mirror of
git://git.gnupg.org/gnupg.git
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e5891a82c3
* agent/cvt-openpgp.c (get_keygrip): Handle Curve25519. (convert_secret_key, convert_transfer_key): Ditto. * common/openpgp-oid.c (oidtable): Add Curve25519. (oid_crv25519, openpgp_oid_is_crv25519): New. * common/util.h (openpgp_oid_is_crv25519): New. * g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Handle the case with Montgomery curve which uses x-only coordinate. * g10/keygen.c (gen_ecc): Handle Curve25519. (ask_curve): Change the API and second arg is to return subkey algo. (generate_keypair, generate_subkeypair): Follow chage of ask_curve. * g10/keyid.c (keygrip_from_pk): Handle Curve25519. * g10/pkglue.c (pk_encrypt): Handle Curve25519. * g10/pubkey-enc.c (get_it): Handle the case with Montgomery curve. * scd/app-openpgp.c (ECC_FLAG_DJB_TWEAK): New. (send_key_attr): Work with general ECC, Ed25519, and Curve25519. (get_public_key): Likewise. (ecc_writekey): Handle flag_djb_tweak. -- When libgcrypt has Curve25519, GnuPG now supports Curve25519.
4649 lines
137 KiB
C
4649 lines
137 KiB
C
/* app-openpgp.c - The OpenPGP card application.
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* Copyright (C) 2003, 2004, 2005, 2007, 2008,
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* 2009, 2013, 2014, 2015 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/* Some notes:
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CHV means Card Holder Verification and is nothing else than a PIN
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or password. That term seems to have been used originally with GSM
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cards. Version v2 of the specs changes the term to the clearer
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term PW for password. We use the terms here interchangeable
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because we do not want to change existing strings i18n wise.
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Version 2 of the specs also drops the separate PW2 which was
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required in v1 due to ISO requirements. It is now possible to have
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one physical PW but two reference to it so that they can be
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individually be verified (e.g. to implement a forced verification
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for one key). Thus you will noticed the use of PW2 with the verify
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command but not with change_reference_data because the latter
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operates directly on the physical PW.
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The Reset Code (RC) as implemented by v2 cards uses the same error
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counter as the PW2 of v1 cards. By default no RC is set and thus
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that error counter is set to 0. After setting the RC the error
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counter will be initialized to 3.
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*/
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#include <config.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <assert.h>
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#include <time.h>
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#if GNUPG_MAJOR_VERSION == 1
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/* This is used with GnuPG version < 1.9. The code has been source
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copied from the current GnuPG >= 1.9 and is maintained over
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there. */
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#include "options.h"
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#include "errors.h"
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#include "memory.h"
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#include "cardglue.h"
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#else /* GNUPG_MAJOR_VERSION != 1 */
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#include "scdaemon.h"
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#endif /* GNUPG_MAJOR_VERSION != 1 */
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#include "util.h"
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#include "i18n.h"
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#include "iso7816.h"
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#include "app-common.h"
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#include "tlv.h"
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#include "host2net.h"
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#include "openpgpdefs.h"
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/* A table describing the DOs of the card. */
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static struct {
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int tag;
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int constructed;
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int get_from; /* Constructed DO with this DO or 0 for direct access. */
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int binary:1;
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int dont_cache:1;
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int flush_on_error:1;
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int get_immediate_in_v11:1; /* Enable a hack to bypass the cache of
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this data object if it is used in 1.1
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and later versions of the card. This
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does not work with composite DO and
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is currently only useful for the CHV
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status bytes. */
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int try_extlen:1; /* Large object; try to use an extended
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length APDU. */
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char *desc;
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} data_objects[] = {
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{ 0x005E, 0, 0, 1, 0, 0, 0, 0, "Login Data" },
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{ 0x5F50, 0, 0, 0, 0, 0, 0, 0, "URL" },
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{ 0x5F52, 0, 0, 1, 0, 0, 0, 0, "Historical Bytes" },
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{ 0x0065, 1, 0, 1, 0, 0, 0, 0, "Cardholder Related Data"},
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{ 0x005B, 0, 0x65, 0, 0, 0, 0, 0, "Name" },
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{ 0x5F2D, 0, 0x65, 0, 0, 0, 0, 0, "Language preferences" },
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{ 0x5F35, 0, 0x65, 0, 0, 0, 0, 0, "Sex" },
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{ 0x006E, 1, 0, 1, 0, 0, 0, 0, "Application Related Data" },
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{ 0x004F, 0, 0x6E, 1, 0, 0, 0, 0, "AID" },
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{ 0x0073, 1, 0, 1, 0, 0, 0, 0, "Discretionary Data Objects" },
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{ 0x0047, 0, 0x6E, 1, 1, 0, 0, 0, "Card Capabilities" },
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{ 0x00C0, 0, 0x6E, 1, 1, 0, 0, 0, "Extended Card Capabilities" },
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{ 0x00C1, 0, 0x6E, 1, 1, 0, 0, 0, "Algorithm Attributes Signature" },
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{ 0x00C2, 0, 0x6E, 1, 1, 0, 0, 0, "Algorithm Attributes Decryption" },
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{ 0x00C3, 0, 0x6E, 1, 1, 0, 0, 0, "Algorithm Attributes Authentication" },
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{ 0x00C4, 0, 0x6E, 1, 0, 1, 1, 0, "CHV Status Bytes" },
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{ 0x00C5, 0, 0x6E, 1, 0, 0, 0, 0, "Fingerprints" },
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{ 0x00C6, 0, 0x6E, 1, 0, 0, 0, 0, "CA Fingerprints" },
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{ 0x00CD, 0, 0x6E, 1, 0, 0, 0, 0, "Generation time" },
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{ 0x007A, 1, 0, 1, 0, 0, 0, 0, "Security Support Template" },
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{ 0x0093, 0, 0x7A, 1, 1, 0, 0, 0, "Digital Signature Counter" },
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{ 0x0101, 0, 0, 0, 0, 0, 0, 0, "Private DO 1"},
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{ 0x0102, 0, 0, 0, 0, 0, 0, 0, "Private DO 2"},
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{ 0x0103, 0, 0, 0, 0, 0, 0, 0, "Private DO 3"},
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{ 0x0104, 0, 0, 0, 0, 0, 0, 0, "Private DO 4"},
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{ 0x7F21, 1, 0, 1, 0, 0, 0, 1, "Cardholder certificate"},
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/* V3.0 */
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{ 0x7F74, 0, 0, 1, 0, 0, 0, 0, "General Feature Management"},
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{ 0x00D5, 0, 0, 1, 0, 0, 0, 0, "AES key data"},
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{ 0 }
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};
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/* Type of keys. */
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typedef enum
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{
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KEY_TYPE_ECC,
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KEY_TYPE_RSA,
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}
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key_type_t;
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/* The format of RSA private keys. */
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typedef enum
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{
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RSA_UNKNOWN_FMT,
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RSA_STD,
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RSA_STD_N,
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RSA_CRT,
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RSA_CRT_N
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}
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rsa_key_format_t;
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/* One cache item for DOs. */
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struct cache_s {
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struct cache_s *next;
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int tag;
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size_t length;
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unsigned char data[1];
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};
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/* Object with application (i.e. OpenPGP card) specific data. */
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struct app_local_s {
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/* A linked list with cached DOs. */
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struct cache_s *cache;
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/* Keep track of the public keys. */
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struct
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{
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int read_done; /* True if we have at least tried to read them. */
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unsigned char *key; /* This is a malloced buffer with a canonical
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encoded S-expression encoding a public
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key. Might be NULL if key is not
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available. */
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size_t keylen; /* The length of the above S-expression. This
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is usually only required for cross checks
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because the length of an S-expression is
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implicitly available. */
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} pk[3];
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unsigned char status_indicator; /* The card status indicator. */
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unsigned int manufacturer:16; /* Manufacturer ID from the s/n. */
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/* Keep track of the ISO card capabilities. */
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struct
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{
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unsigned int cmd_chaining:1; /* Command chaining is supported. */
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unsigned int ext_lc_le:1; /* Extended Lc and Le are supported. */
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} cardcap;
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/* Keep track of extended card capabilities. */
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struct
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{
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unsigned int is_v2:1; /* This is a v2.0 compatible card. */
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unsigned int sm_supported:1; /* Secure Messaging is supported. */
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unsigned int get_challenge:1;
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unsigned int key_import:1;
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unsigned int change_force_chv:1;
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unsigned int private_dos:1;
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unsigned int algo_attr_change:1; /* Algorithm attributes changeable. */
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unsigned int has_decrypt:1; /* Support symmetric decryption. */
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unsigned int has_button:1;
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unsigned int sm_algo:2; /* Symmetric crypto algo for SM. */
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unsigned int max_certlen_3:16;
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unsigned int max_get_challenge:16; /* Maximum size for get_challenge. */
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unsigned int max_cmd_data:16; /* Maximum data size for a command. */
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unsigned int max_rsp_data:16; /* Maximum size of a response. */
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} extcap;
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/* Flags used to control the application. */
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struct
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{
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unsigned int no_sync:1; /* Do not sync CHV1 and CHV2 */
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unsigned int def_chv2:1; /* Use 123456 for CHV2. */
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} flags;
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/* Pinpad request specified on card. */
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struct
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{
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unsigned int specified:1;
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int fixedlen_user;
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int fixedlen_admin;
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} pinpad;
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struct
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{
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key_type_t key_type;
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union {
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struct {
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unsigned int n_bits; /* Size of the modulus in bits. The rest
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of this strucuire is only valid if
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this is not 0. */
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unsigned int e_bits; /* Size of the public exponent in bits. */
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rsa_key_format_t format;
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} rsa;
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struct {
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const char *oid;
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int flags;
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} ecc;
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};
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} keyattr[3];
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};
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#define ECC_FLAG_DJB_TWEAK (1 << 0)
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/***** Local prototypes *****/
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static unsigned long convert_sig_counter_value (const unsigned char *value,
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size_t valuelen);
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static unsigned long get_sig_counter (app_t app);
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static gpg_error_t do_auth (app_t app, const char *keyidstr,
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gpg_error_t (*pincb)(void*, const char *, char **),
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void *pincb_arg,
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const void *indata, size_t indatalen,
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unsigned char **outdata, size_t *outdatalen);
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static void parse_algorithm_attribute (app_t app, int keyno);
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static gpg_error_t change_keyattr_from_string
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(app_t app,
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gpg_error_t (*pincb)(void*, const char *, char **),
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void *pincb_arg,
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const void *value, size_t valuelen);
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/* Deconstructor. */
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static void
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do_deinit (app_t app)
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{
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if (app && app->app_local)
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{
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struct cache_s *c, *c2;
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int i;
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for (c = app->app_local->cache; c; c = c2)
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{
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c2 = c->next;
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xfree (c);
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}
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for (i=0; i < DIM (app->app_local->pk); i++)
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{
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xfree (app->app_local->pk[i].key);
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app->app_local->pk[i].read_done = 0;
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}
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xfree (app->app_local);
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app->app_local = NULL;
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}
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}
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/* Wrapper around iso7816_get_data which first tries to get the data
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from the cache. With GET_IMMEDIATE passed as true, the cache is
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bypassed. With TRY_EXTLEN extended lengths APDUs are use if
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supported by the card. */
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static gpg_error_t
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get_cached_data (app_t app, int tag,
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unsigned char **result, size_t *resultlen,
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int get_immediate, int try_extlen)
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{
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gpg_error_t err;
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int i;
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unsigned char *p;
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size_t len;
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struct cache_s *c;
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int exmode;
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*result = NULL;
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*resultlen = 0;
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if (!get_immediate)
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{
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for (c=app->app_local->cache; c; c = c->next)
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if (c->tag == tag)
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{
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if(c->length)
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{
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p = xtrymalloc (c->length);
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if (!p)
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return gpg_error (gpg_err_code_from_errno (errno));
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memcpy (p, c->data, c->length);
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*result = p;
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}
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*resultlen = c->length;
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return 0;
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}
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}
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if (try_extlen && app->app_local->cardcap.ext_lc_le)
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exmode = app->app_local->extcap.max_rsp_data;
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else
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exmode = 0;
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err = iso7816_get_data (app->slot, exmode, tag, &p, &len);
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if (err)
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return err;
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*result = p;
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*resultlen = len;
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/* Check whether we should cache this object. */
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if (get_immediate)
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return 0;
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for (i=0; data_objects[i].tag; i++)
|
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if (data_objects[i].tag == tag)
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{
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if (data_objects[i].dont_cache)
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return 0;
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break;
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}
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/* Okay, cache it. */
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for (c=app->app_local->cache; c; c = c->next)
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assert (c->tag != tag);
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c = xtrymalloc (sizeof *c + len);
|
||
if (c)
|
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{
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memcpy (c->data, p, len);
|
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c->length = len;
|
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c->tag = tag;
|
||
c->next = app->app_local->cache;
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app->app_local->cache = c;
|
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}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Remove DO at TAG from the cache. */
|
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static void
|
||
flush_cache_item (app_t app, int tag)
|
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{
|
||
struct cache_s *c, *cprev;
|
||
int i;
|
||
|
||
if (!app->app_local)
|
||
return;
|
||
|
||
for (c=app->app_local->cache, cprev=NULL; c ; cprev=c, c = c->next)
|
||
if (c->tag == tag)
|
||
{
|
||
if (cprev)
|
||
cprev->next = c->next;
|
||
else
|
||
app->app_local->cache = c->next;
|
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xfree (c);
|
||
|
||
for (c=app->app_local->cache; c ; c = c->next)
|
||
{
|
||
assert (c->tag != tag); /* Oops: duplicated entry. */
|
||
}
|
||
return;
|
||
}
|
||
|
||
/* Try again if we have an outer tag. */
|
||
for (i=0; data_objects[i].tag; i++)
|
||
if (data_objects[i].tag == tag && data_objects[i].get_from
|
||
&& data_objects[i].get_from != tag)
|
||
flush_cache_item (app, data_objects[i].get_from);
|
||
}
|
||
|
||
/* Flush all entries from the cache which might be out of sync after
|
||
an error. */
|
||
static void
|
||
flush_cache_after_error (app_t app)
|
||
{
|
||
int i;
|
||
|
||
for (i=0; data_objects[i].tag; i++)
|
||
if (data_objects[i].flush_on_error)
|
||
flush_cache_item (app, data_objects[i].tag);
|
||
}
|
||
|
||
|
||
/* Flush the entire cache. */
|
||
static void
|
||
flush_cache (app_t app)
|
||
{
|
||
if (app && app->app_local)
|
||
{
|
||
struct cache_s *c, *c2;
|
||
|
||
for (c = app->app_local->cache; c; c = c2)
|
||
{
|
||
c2 = c->next;
|
||
xfree (c);
|
||
}
|
||
app->app_local->cache = NULL;
|
||
}
|
||
}
|
||
|
||
|
||
/* Get the DO identified by TAG from the card in SLOT and return a
|
||
buffer with its content in RESULT and NBYTES. The return value is
|
||
NULL if not found or a pointer which must be used to release the
|
||
buffer holding value. */
|
||
static void *
|
||
get_one_do (app_t app, int tag, unsigned char **result, size_t *nbytes,
|
||
int *r_rc)
|
||
{
|
||
int rc, i;
|
||
unsigned char *buffer;
|
||
size_t buflen;
|
||
unsigned char *value;
|
||
size_t valuelen;
|
||
int dummyrc;
|
||
int exmode;
|
||
|
||
if (!r_rc)
|
||
r_rc = &dummyrc;
|
||
|
||
*result = NULL;
|
||
*nbytes = 0;
|
||
*r_rc = 0;
|
||
for (i=0; data_objects[i].tag && data_objects[i].tag != tag; i++)
|
||
;
|
||
|
||
if (app->card_version > 0x0100 && data_objects[i].get_immediate_in_v11)
|
||
{
|
||
if (data_objects[i].try_extlen && app->app_local->cardcap.ext_lc_le)
|
||
exmode = app->app_local->extcap.max_rsp_data;
|
||
else
|
||
exmode = 0;
|
||
rc = iso7816_get_data (app->slot, exmode, tag, &buffer, &buflen);
|
||
if (rc)
|
||
{
|
||
*r_rc = rc;
|
||
return NULL;
|
||
}
|
||
*result = buffer;
|
||
*nbytes = buflen;
|
||
return buffer;
|
||
}
|
||
|
||
value = NULL;
|
||
rc = -1;
|
||
if (data_objects[i].tag && data_objects[i].get_from)
|
||
{
|
||
rc = get_cached_data (app, data_objects[i].get_from,
|
||
&buffer, &buflen,
|
||
(data_objects[i].dont_cache
|
||
|| data_objects[i].get_immediate_in_v11),
|
||
data_objects[i].try_extlen);
|
||
if (!rc)
|
||
{
|
||
const unsigned char *s;
|
||
|
||
s = find_tlv_unchecked (buffer, buflen, tag, &valuelen);
|
||
if (!s)
|
||
value = NULL; /* not found */
|
||
else if (valuelen > buflen - (s - buffer))
|
||
{
|
||
log_error ("warning: constructed DO too short\n");
|
||
value = NULL;
|
||
xfree (buffer); buffer = NULL;
|
||
}
|
||
else
|
||
value = buffer + (s - buffer);
|
||
}
|
||
}
|
||
|
||
if (!value) /* Not in a constructed DO, try simple. */
|
||
{
|
||
rc = get_cached_data (app, tag, &buffer, &buflen,
|
||
(data_objects[i].dont_cache
|
||
|| data_objects[i].get_immediate_in_v11),
|
||
data_objects[i].try_extlen);
|
||
if (!rc)
|
||
{
|
||
value = buffer;
|
||
valuelen = buflen;
|
||
}
|
||
}
|
||
|
||
if (!rc)
|
||
{
|
||
*nbytes = valuelen;
|
||
*result = value;
|
||
return buffer;
|
||
}
|
||
*r_rc = rc;
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static void
|
||
dump_all_do (int slot)
|
||
{
|
||
int rc, i, j;
|
||
unsigned char *buffer;
|
||
size_t buflen;
|
||
|
||
for (i=0; data_objects[i].tag; i++)
|
||
{
|
||
if (data_objects[i].get_from)
|
||
continue;
|
||
|
||
/* We don't try extended length APDU because such large DO would
|
||
be pretty useless in a log file. */
|
||
rc = iso7816_get_data (slot, 0, data_objects[i].tag, &buffer, &buflen);
|
||
if (gpg_err_code (rc) == GPG_ERR_NO_OBJ)
|
||
;
|
||
else if (rc)
|
||
log_info ("DO '%s' not available: %s\n",
|
||
data_objects[i].desc, gpg_strerror (rc));
|
||
else
|
||
{
|
||
if (data_objects[i].binary)
|
||
{
|
||
log_info ("DO '%s': ", data_objects[i].desc);
|
||
log_printhex ("", buffer, buflen);
|
||
}
|
||
else
|
||
log_info ("DO '%s': '%.*s'\n",
|
||
data_objects[i].desc,
|
||
(int)buflen, buffer); /* FIXME: sanitize */
|
||
|
||
if (data_objects[i].constructed)
|
||
{
|
||
for (j=0; data_objects[j].tag; j++)
|
||
{
|
||
const unsigned char *value;
|
||
size_t valuelen;
|
||
|
||
if (j==i || data_objects[i].tag != data_objects[j].get_from)
|
||
continue;
|
||
value = find_tlv_unchecked (buffer, buflen,
|
||
data_objects[j].tag, &valuelen);
|
||
if (!value)
|
||
; /* not found */
|
||
else if (valuelen > buflen - (value - buffer))
|
||
log_error ("warning: constructed DO too short\n");
|
||
else
|
||
{
|
||
if (data_objects[j].binary)
|
||
{
|
||
log_info ("DO '%s': ", data_objects[j].desc);
|
||
if (valuelen > 200)
|
||
log_info ("[%u]\n", (unsigned int)valuelen);
|
||
else
|
||
log_printhex ("", value, valuelen);
|
||
}
|
||
else
|
||
log_info ("DO '%s': '%.*s'\n",
|
||
data_objects[j].desc,
|
||
(int)valuelen, value); /* FIXME: sanitize */
|
||
}
|
||
}
|
||
}
|
||
}
|
||
xfree (buffer); buffer = NULL;
|
||
}
|
||
}
|
||
|
||
|
||
/* Count the number of bits, assuming the A represents an unsigned big
|
||
integer of length LEN bytes. */
|
||
static unsigned int
|
||
count_bits (const unsigned char *a, size_t len)
|
||
{
|
||
unsigned int n = len * 8;
|
||
int i;
|
||
|
||
for (; len && !*a; len--, a++, n -=8)
|
||
;
|
||
if (len)
|
||
{
|
||
for (i=7; i && !(*a & (1<<i)); i--)
|
||
n--;
|
||
}
|
||
return n;
|
||
}
|
||
|
||
/* GnuPG makes special use of the login-data DO, this function parses
|
||
the login data to store the flags for later use. It may be called
|
||
at any time and should be called after changing the login-data DO.
|
||
|
||
Everything up to a LF is considered a mailbox or account name. If
|
||
the first LF is followed by DC4 (0x14) control sequence are
|
||
expected up to the next LF. Control sequences are separated by FS
|
||
(0x18) and consist of key=value pairs. There are two keys defined:
|
||
|
||
F=<flags>
|
||
|
||
Where FLAGS is a plain hexadecimal number representing flag values.
|
||
The lsb is here the rightmost bit. Defined flags bits are:
|
||
|
||
Bit 0 = CHV1 and CHV2 are not syncronized
|
||
Bit 1 = CHV2 has been been set to the default PIN of "123456"
|
||
(this implies that bit 0 is also set).
|
||
|
||
P=<pinpad-request>
|
||
|
||
Where PINPAD_REQUEST is in the format of: <n> or <n>,<m>.
|
||
N for user PIN, M for admin PIN. If M is missing it means M=N.
|
||
0 means to force not to use pinpad.
|
||
|
||
*/
|
||
static void
|
||
parse_login_data (app_t app)
|
||
{
|
||
unsigned char *buffer, *p;
|
||
size_t buflen, len;
|
||
void *relptr;
|
||
|
||
/* Set defaults. */
|
||
app->app_local->flags.no_sync = 0;
|
||
app->app_local->flags.def_chv2 = 0;
|
||
app->app_local->pinpad.specified = 0;
|
||
app->app_local->pinpad.fixedlen_user = -1;
|
||
app->app_local->pinpad.fixedlen_admin = -1;
|
||
|
||
/* Read the DO. */
|
||
relptr = get_one_do (app, 0x005E, &buffer, &buflen, NULL);
|
||
if (!relptr)
|
||
return; /* Ooops. */
|
||
for (; buflen; buflen--, buffer++)
|
||
if (*buffer == '\n')
|
||
break;
|
||
if (buflen < 2 || buffer[1] != '\x14')
|
||
{
|
||
xfree (relptr);
|
||
return; /* No control sequences. */
|
||
}
|
||
|
||
buflen--;
|
||
buffer++;
|
||
do
|
||
{
|
||
buflen--;
|
||
buffer++;
|
||
if (buflen > 1 && *buffer == 'F' && buffer[1] == '=')
|
||
{
|
||
/* Flags control sequence found. */
|
||
int lastdig = 0;
|
||
|
||
/* For now we are only interested in the last digit, so skip
|
||
any leading digits but bail out on invalid characters. */
|
||
for (p=buffer+2, len = buflen-2; len && hexdigitp (p); p++, len--)
|
||
lastdig = xtoi_1 (p);
|
||
buffer = p;
|
||
buflen = len;
|
||
if (len && !(*p == '\n' || *p == '\x18'))
|
||
goto next; /* Invalid characters in field. */
|
||
app->app_local->flags.no_sync = !!(lastdig & 1);
|
||
app->app_local->flags.def_chv2 = (lastdig & 3) == 3;
|
||
}
|
||
else if (buflen > 1 && *buffer == 'P' && buffer[1] == '=')
|
||
{
|
||
/* Pinpad request control sequence found. */
|
||
buffer += 2;
|
||
buflen -= 2;
|
||
|
||
if (buflen)
|
||
{
|
||
if (digitp (buffer))
|
||
{
|
||
char *q;
|
||
int n, m;
|
||
|
||
n = strtol (buffer, &q, 10);
|
||
if (q >= (char *)buffer + buflen
|
||
|| *q == '\x18' || *q == '\n')
|
||
m = n;
|
||
else
|
||
{
|
||
if (*q++ != ',' || !digitp (q))
|
||
goto next;
|
||
m = strtol (q, &q, 10);
|
||
}
|
||
|
||
if (buflen < ((unsigned char *)q - buffer))
|
||
break;
|
||
|
||
buflen -= ((unsigned char *)q - buffer);
|
||
buffer = q;
|
||
|
||
if (buflen && !(*buffer == '\n' || *buffer == '\x18'))
|
||
goto next;
|
||
app->app_local->pinpad.specified = 1;
|
||
app->app_local->pinpad.fixedlen_user = n;
|
||
app->app_local->pinpad.fixedlen_admin = m;
|
||
}
|
||
}
|
||
}
|
||
next:
|
||
/* Skip to FS (0x18) or LF (\n). */
|
||
for (; buflen && *buffer != '\x18' && *buffer != '\n'; buflen--)
|
||
buffer++;
|
||
}
|
||
while (buflen && *buffer != '\n');
|
||
|
||
xfree (relptr);
|
||
}
|
||
|
||
|
||
#define MAX_ARGS_STORE_FPR 3
|
||
|
||
/* Note, that FPR must be at least 20 bytes. */
|
||
static gpg_error_t
|
||
store_fpr (app_t app, int keynumber, u32 timestamp, unsigned char *fpr,
|
||
int algo, ...)
|
||
{
|
||
unsigned int n, nbits;
|
||
unsigned char *buffer, *p;
|
||
int tag, tag2;
|
||
int rc;
|
||
const unsigned char *m[MAX_ARGS_STORE_FPR];
|
||
size_t mlen[MAX_ARGS_STORE_FPR];
|
||
va_list ap;
|
||
int argc;
|
||
int i;
|
||
|
||
n = 6; /* key packet version, 4-byte timestamps, and algorithm */
|
||
if (algo == PUBKEY_ALGO_ECDH)
|
||
argc = 3;
|
||
else
|
||
argc = 2;
|
||
|
||
va_start (ap, algo);
|
||
for (i = 0; i < argc; i++)
|
||
{
|
||
m[i] = va_arg (ap, const unsigned char *);
|
||
mlen[i] = va_arg (ap, size_t);
|
||
if (algo == PUBKEY_ALGO_RSA || i == 1)
|
||
n += 2;
|
||
n += mlen[i];
|
||
}
|
||
va_end (ap);
|
||
|
||
p = buffer = xtrymalloc (3 + n);
|
||
if (!buffer)
|
||
return gpg_error_from_syserror ();
|
||
|
||
*p++ = 0x99; /* ctb */
|
||
*p++ = n >> 8; /* 2 byte length header */
|
||
*p++ = n;
|
||
*p++ = 4; /* key packet version */
|
||
*p++ = timestamp >> 24;
|
||
*p++ = timestamp >> 16;
|
||
*p++ = timestamp >> 8;
|
||
*p++ = timestamp;
|
||
*p++ = algo;
|
||
|
||
for (i = 0; i < argc; i++)
|
||
{
|
||
if (algo == PUBKEY_ALGO_RSA || i == 1)
|
||
{
|
||
nbits = count_bits (m[i], mlen[i]);
|
||
*p++ = nbits >> 8;
|
||
*p++ = nbits;
|
||
}
|
||
memcpy (p, m[i], mlen[i]);
|
||
p += mlen[i];
|
||
}
|
||
|
||
gcry_md_hash_buffer (GCRY_MD_SHA1, fpr, buffer, n+3);
|
||
|
||
xfree (buffer);
|
||
|
||
tag = (app->card_version > 0x0007? 0xC7 : 0xC6) + keynumber;
|
||
flush_cache_item (app, 0xC5);
|
||
tag2 = 0xCE + keynumber;
|
||
flush_cache_item (app, 0xCD);
|
||
|
||
rc = iso7816_put_data (app->slot, 0, tag, fpr, 20);
|
||
if (rc)
|
||
log_error (_("failed to store the fingerprint: %s\n"),gpg_strerror (rc));
|
||
|
||
if (!rc && app->card_version > 0x0100)
|
||
{
|
||
unsigned char buf[4];
|
||
|
||
buf[0] = timestamp >> 24;
|
||
buf[1] = timestamp >> 16;
|
||
buf[2] = timestamp >> 8;
|
||
buf[3] = timestamp;
|
||
|
||
rc = iso7816_put_data (app->slot, 0, tag2, buf, 4);
|
||
if (rc)
|
||
log_error (_("failed to store the creation date: %s\n"),
|
||
gpg_strerror (rc));
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
static void
|
||
send_fpr_if_not_null (ctrl_t ctrl, const char *keyword,
|
||
int number, const unsigned char *fpr)
|
||
{
|
||
int i;
|
||
char buf[41];
|
||
char numbuf[25];
|
||
|
||
for (i=0; i < 20 && !fpr[i]; i++)
|
||
;
|
||
if (i==20)
|
||
return; /* All zero. */
|
||
bin2hex (fpr, 20, buf);
|
||
if (number == -1)
|
||
*numbuf = 0; /* Don't print the key number */
|
||
else
|
||
sprintf (numbuf, "%d", number);
|
||
send_status_info (ctrl, keyword,
|
||
numbuf, (size_t)strlen(numbuf),
|
||
buf, (size_t)strlen (buf), NULL, 0);
|
||
}
|
||
|
||
static void
|
||
send_fprtime_if_not_null (ctrl_t ctrl, const char *keyword,
|
||
int number, const unsigned char *stamp)
|
||
{
|
||
char numbuf1[50], numbuf2[50];
|
||
unsigned long value;
|
||
|
||
value = buf32_to_ulong (stamp);
|
||
if (!value)
|
||
return;
|
||
sprintf (numbuf1, "%d", number);
|
||
sprintf (numbuf2, "%lu", value);
|
||
send_status_info (ctrl, keyword,
|
||
numbuf1, (size_t)strlen(numbuf1),
|
||
numbuf2, (size_t)strlen(numbuf2), NULL, 0);
|
||
}
|
||
|
||
static void
|
||
send_key_data (ctrl_t ctrl, const char *name,
|
||
const unsigned char *a, size_t alen)
|
||
{
|
||
char *buffer, *buf;
|
||
size_t buflen;
|
||
|
||
buffer = buf = bin2hex (a, alen, NULL);
|
||
if (!buffer)
|
||
{
|
||
log_error ("memory allocation error in send_key_data\n");
|
||
return;
|
||
}
|
||
buflen = strlen (buffer);
|
||
|
||
/* 768 is the hexified size for the modulus of an 3072 bit key. We
|
||
use extra chunks to transmit larger data (i.e for 4096 bit). */
|
||
for ( ;buflen > 768; buflen -= 768, buf += 768)
|
||
send_status_info (ctrl, "KEY-DATA",
|
||
"-", 1,
|
||
buf, 768,
|
||
NULL, 0);
|
||
send_status_info (ctrl, "KEY-DATA",
|
||
name, (size_t)strlen(name),
|
||
buf, buflen,
|
||
NULL, 0);
|
||
xfree (buffer);
|
||
}
|
||
|
||
|
||
static void
|
||
send_key_attr (ctrl_t ctrl, app_t app, const char *keyword, int keyno)
|
||
{
|
||
char buffer[200];
|
||
|
||
assert (keyno >=0 && keyno < DIM(app->app_local->keyattr));
|
||
|
||
if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA)
|
||
snprintf (buffer, sizeof buffer, "%d 1 rsa%u %u %d",
|
||
keyno+1,
|
||
app->app_local->keyattr[keyno].rsa.n_bits,
|
||
app->app_local->keyattr[keyno].rsa.e_bits,
|
||
app->app_local->keyattr[keyno].rsa.format);
|
||
else if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_ECC)
|
||
{
|
||
snprintf (buffer, sizeof buffer, "%d %d %s",
|
||
keyno+1,
|
||
keyno==1? PUBKEY_ALGO_ECDH :
|
||
app->app_local->keyattr[keyno].ecc.flags?
|
||
PUBKEY_ALGO_EDDSA : PUBKEY_ALGO_ECDSA,
|
||
openpgp_oid_to_curve (app->app_local->keyattr[keyno].ecc.oid, 0));
|
||
}
|
||
else
|
||
snprintf (buffer, sizeof buffer, "%d 0 0 UNKNOWN", keyno+1);
|
||
|
||
send_status_direct (ctrl, keyword, buffer);
|
||
}
|
||
|
||
|
||
/* Implement the GETATTR command. This is similar to the LEARN
|
||
command but returns just one value via the status interface. */
|
||
static gpg_error_t
|
||
do_getattr (app_t app, ctrl_t ctrl, const char *name)
|
||
{
|
||
static struct {
|
||
const char *name;
|
||
int tag;
|
||
int special;
|
||
} table[] = {
|
||
{ "DISP-NAME", 0x005B },
|
||
{ "LOGIN-DATA", 0x005E },
|
||
{ "DISP-LANG", 0x5F2D },
|
||
{ "DISP-SEX", 0x5F35 },
|
||
{ "PUBKEY-URL", 0x5F50 },
|
||
{ "KEY-FPR", 0x00C5, 3 },
|
||
{ "KEY-TIME", 0x00CD, 4 },
|
||
{ "KEY-ATTR", 0x0000, -5 },
|
||
{ "CA-FPR", 0x00C6, 3 },
|
||
{ "CHV-STATUS", 0x00C4, 1 },
|
||
{ "SIG-COUNTER", 0x0093, 2 },
|
||
{ "SERIALNO", 0x004F, -1 },
|
||
{ "AID", 0x004F },
|
||
{ "EXTCAP", 0x0000, -2 },
|
||
{ "PRIVATE-DO-1", 0x0101 },
|
||
{ "PRIVATE-DO-2", 0x0102 },
|
||
{ "PRIVATE-DO-3", 0x0103 },
|
||
{ "PRIVATE-DO-4", 0x0104 },
|
||
{ "$AUTHKEYID", 0x0000, -3 },
|
||
{ "$DISPSERIALNO",0x0000, -4 },
|
||
{ NULL, 0 }
|
||
};
|
||
int idx, i, rc;
|
||
void *relptr;
|
||
unsigned char *value;
|
||
size_t valuelen;
|
||
|
||
for (idx=0; table[idx].name && strcmp (table[idx].name, name); idx++)
|
||
;
|
||
if (!table[idx].name)
|
||
return gpg_error (GPG_ERR_INV_NAME);
|
||
|
||
if (table[idx].special == -1)
|
||
{
|
||
/* The serial number is very special. We could have used the
|
||
AID DO to retrieve it, but we have it already in the app
|
||
context and the stamp argument is required anyway which we
|
||
can't by other means. The AID DO is available anyway but not
|
||
hex formatted. */
|
||
char *serial;
|
||
time_t stamp;
|
||
char tmp[50];
|
||
|
||
if (!app_get_serial_and_stamp (app, &serial, &stamp))
|
||
{
|
||
sprintf (tmp, "%lu", (unsigned long)stamp);
|
||
send_status_info (ctrl, "SERIALNO",
|
||
serial, strlen (serial),
|
||
tmp, strlen (tmp),
|
||
NULL, 0);
|
||
xfree (serial);
|
||
}
|
||
return 0;
|
||
}
|
||
if (table[idx].special == -2)
|
||
{
|
||
char tmp[110];
|
||
|
||
snprintf (tmp, sizeof tmp,
|
||
"gc=%d ki=%d fc=%d pd=%d mcl3=%u aac=%d "
|
||
"sm=%d si=%u dec=%d bt=%d",
|
||
app->app_local->extcap.get_challenge,
|
||
app->app_local->extcap.key_import,
|
||
app->app_local->extcap.change_force_chv,
|
||
app->app_local->extcap.private_dos,
|
||
app->app_local->extcap.max_certlen_3,
|
||
app->app_local->extcap.algo_attr_change,
|
||
(app->app_local->extcap.sm_supported
|
||
? (app->app_local->extcap.sm_algo == 0? CIPHER_ALGO_3DES :
|
||
(app->app_local->extcap.sm_algo == 1?
|
||
CIPHER_ALGO_AES : CIPHER_ALGO_AES256))
|
||
: 0),
|
||
app->app_local->status_indicator,
|
||
app->app_local->extcap.has_decrypt,
|
||
app->app_local->extcap.has_button);
|
||
send_status_info (ctrl, table[idx].name, tmp, strlen (tmp), NULL, 0);
|
||
return 0;
|
||
}
|
||
if (table[idx].special == -3)
|
||
{
|
||
char const tmp[] = "OPENPGP.3";
|
||
send_status_info (ctrl, table[idx].name, tmp, strlen (tmp), NULL, 0);
|
||
return 0;
|
||
}
|
||
if (table[idx].special == -4)
|
||
{
|
||
char *serial;
|
||
time_t stamp;
|
||
|
||
if (!app_get_serial_and_stamp (app, &serial, &stamp))
|
||
{
|
||
if (strlen (serial) > 16+12)
|
||
{
|
||
send_status_info (ctrl, table[idx].name, serial+16, 12, NULL, 0);
|
||
xfree (serial);
|
||
return 0;
|
||
}
|
||
xfree (serial);
|
||
}
|
||
return gpg_error (GPG_ERR_INV_NAME);
|
||
}
|
||
if (table[idx].special == -5)
|
||
{
|
||
for (i=0; i < 3; i++)
|
||
send_key_attr (ctrl, app, table[idx].name, i);
|
||
return 0;
|
||
}
|
||
|
||
relptr = get_one_do (app, table[idx].tag, &value, &valuelen, &rc);
|
||
if (relptr)
|
||
{
|
||
if (table[idx].special == 1)
|
||
{
|
||
char numbuf[7*23];
|
||
|
||
for (i=0,*numbuf=0; i < valuelen && i < 7; i++)
|
||
sprintf (numbuf+strlen (numbuf), " %d", value[i]);
|
||
send_status_info (ctrl, table[idx].name,
|
||
numbuf, strlen (numbuf), NULL, 0);
|
||
}
|
||
else if (table[idx].special == 2)
|
||
{
|
||
char numbuf[50];
|
||
|
||
sprintf (numbuf, "%lu", convert_sig_counter_value (value, valuelen));
|
||
send_status_info (ctrl, table[idx].name,
|
||
numbuf, strlen (numbuf), NULL, 0);
|
||
}
|
||
else if (table[idx].special == 3)
|
||
{
|
||
if (valuelen >= 60)
|
||
for (i=0; i < 3; i++)
|
||
send_fpr_if_not_null (ctrl, table[idx].name, i+1, value+i*20);
|
||
}
|
||
else if (table[idx].special == 4)
|
||
{
|
||
if (valuelen >= 12)
|
||
for (i=0; i < 3; i++)
|
||
send_fprtime_if_not_null (ctrl, table[idx].name, i+1, value+i*4);
|
||
}
|
||
else
|
||
send_status_info (ctrl, table[idx].name, value, valuelen, NULL, 0);
|
||
|
||
xfree (relptr);
|
||
}
|
||
return rc;
|
||
}
|
||
|
||
/* Retrieve the fingerprint from the card inserted in SLOT and write
|
||
the according hex representation to FPR. Caller must have provide
|
||
a buffer at FPR of least 41 bytes. Returns 0 on success or an
|
||
error code. */
|
||
#if GNUPG_MAJOR_VERSION > 1
|
||
static gpg_error_t
|
||
retrieve_fpr_from_card (app_t app, int keyno, char *fpr)
|
||
{
|
||
gpg_error_t err = 0;
|
||
void *relptr;
|
||
unsigned char *value;
|
||
size_t valuelen;
|
||
|
||
assert (keyno >=0 && keyno <= 2);
|
||
|
||
relptr = get_one_do (app, 0x00C5, &value, &valuelen, NULL);
|
||
if (relptr && valuelen >= 60)
|
||
bin2hex (value+keyno*20, 20, fpr);
|
||
else
|
||
err = gpg_error (GPG_ERR_NOT_FOUND);
|
||
xfree (relptr);
|
||
return err;
|
||
}
|
||
#endif /*GNUPG_MAJOR_VERSION > 1*/
|
||
|
||
|
||
/* Retrieve the public key material for the RSA key, whose fingerprint
|
||
is FPR, from gpg output, which can be read through the stream FP.
|
||
The RSA modulus will be stored at the address of M and MLEN, the
|
||
public exponent at E and ELEN. Returns zero on success, an error
|
||
code on failure. Caller must release the allocated buffers at M
|
||
and E if the function returns success. */
|
||
#if GNUPG_MAJOR_VERSION > 1
|
||
static gpg_error_t
|
||
retrieve_key_material (FILE *fp, const char *hexkeyid,
|
||
const unsigned char **m, size_t *mlen,
|
||
const unsigned char **e, size_t *elen)
|
||
{
|
||
gcry_error_t err = 0;
|
||
char *line = NULL; /* read_line() buffer. */
|
||
size_t line_size = 0; /* Helper for for read_line. */
|
||
int found_key = 0; /* Helper to find a matching key. */
|
||
unsigned char *m_new = NULL;
|
||
unsigned char *e_new = NULL;
|
||
size_t m_new_n = 0;
|
||
size_t e_new_n = 0;
|
||
|
||
/* Loop over all records until we have found the subkey
|
||
corresponding to the fingerprint. Inm general the first record
|
||
should be the pub record, but we don't rely on that. Given that
|
||
we only need to look at one key, it is sufficient to compare the
|
||
keyid so that we don't need to look at "fpr" records. */
|
||
for (;;)
|
||
{
|
||
char *p;
|
||
char *fields[6] = { NULL, NULL, NULL, NULL, NULL, NULL };
|
||
int nfields;
|
||
size_t max_length;
|
||
gcry_mpi_t mpi;
|
||
int i;
|
||
|
||
max_length = 4096;
|
||
i = read_line (fp, &line, &line_size, &max_length);
|
||
if (!i)
|
||
break; /* EOF. */
|
||
if (i < 0)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave; /* Error. */
|
||
}
|
||
if (!max_length)
|
||
{
|
||
err = gpg_error (GPG_ERR_TRUNCATED);
|
||
goto leave; /* Line truncated - we better stop processing. */
|
||
}
|
||
|
||
/* Parse the line into fields. */
|
||
for (nfields=0, p=line; p && nfields < DIM (fields); nfields++)
|
||
{
|
||
fields[nfields] = p;
|
||
p = strchr (p, ':');
|
||
if (p)
|
||
*(p++) = 0;
|
||
}
|
||
if (!nfields)
|
||
continue; /* No fields at all - skip line. */
|
||
|
||
if (!found_key)
|
||
{
|
||
if ( (!strcmp (fields[0], "sub") || !strcmp (fields[0], "pub") )
|
||
&& nfields > 4 && !strcmp (fields[4], hexkeyid))
|
||
found_key = 1;
|
||
continue;
|
||
}
|
||
|
||
if ( !strcmp (fields[0], "sub") || !strcmp (fields[0], "pub") )
|
||
break; /* Next key - stop. */
|
||
|
||
if ( strcmp (fields[0], "pkd") )
|
||
continue; /* Not a key data record. */
|
||
i = 0; /* Avoid erroneous compiler warning. */
|
||
if ( nfields < 4 || (i = atoi (fields[1])) < 0 || i > 1
|
||
|| (!i && m_new) || (i && e_new))
|
||
{
|
||
err = gpg_error (GPG_ERR_GENERAL);
|
||
goto leave; /* Error: Invalid key data record or not an RSA key. */
|
||
}
|
||
|
||
err = gcry_mpi_scan (&mpi, GCRYMPI_FMT_HEX, fields[3], 0, NULL);
|
||
if (err)
|
||
mpi = NULL;
|
||
else if (!i)
|
||
err = gcry_mpi_aprint (GCRYMPI_FMT_STD, &m_new, &m_new_n, mpi);
|
||
else
|
||
err = gcry_mpi_aprint (GCRYMPI_FMT_STD, &e_new, &e_new_n, mpi);
|
||
gcry_mpi_release (mpi);
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
|
||
if (m_new && e_new)
|
||
{
|
||
*m = m_new;
|
||
*mlen = m_new_n;
|
||
m_new = NULL;
|
||
*e = e_new;
|
||
*elen = e_new_n;
|
||
e_new = NULL;
|
||
}
|
||
else
|
||
err = gpg_error (GPG_ERR_GENERAL);
|
||
|
||
leave:
|
||
xfree (m_new);
|
||
xfree (e_new);
|
||
xfree (line);
|
||
return err;
|
||
}
|
||
#endif /*GNUPG_MAJOR_VERSION > 1*/
|
||
|
||
|
||
/* Get the public key for KEYNO and store it as an S-expresion with
|
||
the APP handle. On error that field gets cleared. If we already
|
||
know about the public key we will just return. Note that this does
|
||
not mean a key is available; this is soley indicated by the
|
||
presence of the app->app_local->pk[KEYNO-1].key field.
|
||
|
||
Note that GnuPG 1.x does not need this and it would be too time
|
||
consuming to send it just for the fun of it. However, given that we
|
||
use the same code in gpg 1.4, we can't use the gcry S-expresion
|
||
here but need to open encode it. */
|
||
#if GNUPG_MAJOR_VERSION > 1
|
||
static gpg_error_t
|
||
get_public_key (app_t app, int keyno)
|
||
{
|
||
gpg_error_t err = 0;
|
||
unsigned char *buffer;
|
||
const unsigned char *keydata, *m, *e;
|
||
size_t buflen, keydatalen;
|
||
size_t mlen = 0;
|
||
size_t elen = 0;
|
||
unsigned char *mbuf = NULL;
|
||
unsigned char *ebuf = NULL;
|
||
char *keybuf = NULL;
|
||
gcry_sexp_t s_pkey;
|
||
size_t len;
|
||
|
||
if (keyno < 1 || keyno > 3)
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
keyno--;
|
||
|
||
/* Already cached? */
|
||
if (app->app_local->pk[keyno].read_done)
|
||
return 0;
|
||
|
||
xfree (app->app_local->pk[keyno].key);
|
||
app->app_local->pk[keyno].key = NULL;
|
||
app->app_local->pk[keyno].keylen = 0;
|
||
|
||
m = e = NULL; /* (avoid cc warning) */
|
||
|
||
if (app->card_version > 0x0100)
|
||
{
|
||
int exmode, le_value;
|
||
|
||
/* We may simply read the public key out of these cards. */
|
||
if (app->app_local->cardcap.ext_lc_le)
|
||
{
|
||
exmode = 1; /* Use extended length. */
|
||
le_value = app->app_local->extcap.max_rsp_data;
|
||
}
|
||
else
|
||
{
|
||
exmode = 0;
|
||
le_value = 256; /* Use legacy value. */
|
||
}
|
||
|
||
err = iso7816_read_public_key
|
||
(app->slot, exmode,
|
||
(const unsigned char*)(keyno == 0? "\xB6" :
|
||
keyno == 1? "\xB8" : "\xA4"), 2,
|
||
le_value,
|
||
&buffer, &buflen);
|
||
if (err)
|
||
{
|
||
log_error (_("reading public key failed: %s\n"), gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
keydata = find_tlv (buffer, buflen, 0x7F49, &keydatalen);
|
||
if (!keydata)
|
||
{
|
||
err = gpg_error (GPG_ERR_CARD);
|
||
log_error (_("response does not contain the public key data\n"));
|
||
goto leave;
|
||
}
|
||
|
||
if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA)
|
||
{
|
||
m = find_tlv (keydata, keydatalen, 0x0081, &mlen);
|
||
if (!m)
|
||
{
|
||
err = gpg_error (GPG_ERR_CARD);
|
||
log_error (_("response does not contain the RSA modulus\n"));
|
||
goto leave;
|
||
}
|
||
|
||
e = find_tlv (keydata, keydatalen, 0x0082, &elen);
|
||
if (!e)
|
||
{
|
||
err = gpg_error (GPG_ERR_CARD);
|
||
log_error (_("response does not contain the RSA public exponent\n"));
|
||
goto leave;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
m = find_tlv (keydata, keydatalen, 0x0086, &mlen);
|
||
if (!m)
|
||
{
|
||
err = gpg_error (GPG_ERR_CARD);
|
||
log_error (_("response does not contain the EC public point\n"));
|
||
goto leave;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Due to a design problem in v1.0 cards we can't get the public
|
||
key out of these cards without doing a verify on CHV3.
|
||
Clearly that is not an option and thus we try to locate the
|
||
key using an external helper.
|
||
|
||
The helper we use here is gpg itself, which should know about
|
||
the key in any case. */
|
||
|
||
char fpr[41];
|
||
char *hexkeyid;
|
||
char *command = NULL;
|
||
FILE *fp;
|
||
int ret;
|
||
|
||
buffer = NULL; /* We don't need buffer. */
|
||
|
||
err = retrieve_fpr_from_card (app, keyno, fpr);
|
||
if (err)
|
||
{
|
||
log_error ("error while retrieving fpr from card: %s\n",
|
||
gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
hexkeyid = fpr + 24;
|
||
|
||
ret = gpgrt_asprintf
|
||
(&command, "gpg --list-keys --with-colons --with-key-data '%s'", fpr);
|
||
if (ret < 0)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
fp = popen (command, "r");
|
||
xfree (command);
|
||
if (!fp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("running gpg failed: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
err = retrieve_key_material (fp, hexkeyid, &m, &mlen, &e, &elen);
|
||
pclose (fp);
|
||
if (err)
|
||
{
|
||
log_error ("error while retrieving key material through pipe: %s\n",
|
||
gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
}
|
||
|
||
mbuf = xtrymalloc (mlen + 1);
|
||
if (!mbuf)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
if ((app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA
|
||
|| (app->app_local->keyattr[keyno].key_type == KEY_TYPE_ECC
|
||
&& !app->app_local->keyattr[keyno].ecc.flags))
|
||
&& mlen && (*m & 0x80))
|
||
{ /* Prepend numbers with a 0 if needed for MPI. */
|
||
*mbuf = 0;
|
||
memcpy (mbuf+1, m, mlen);
|
||
mlen++;
|
||
}
|
||
else if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_ECC
|
||
&& app->app_local->keyattr[keyno].ecc.flags)
|
||
{ /* Prepend 0x40 prefix. */
|
||
*mbuf = 0x40;
|
||
memcpy (mbuf+1, m, mlen);
|
||
mlen++;
|
||
}
|
||
else
|
||
memcpy (mbuf, m, mlen);
|
||
|
||
if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA)
|
||
{
|
||
ebuf = xtrymalloc (elen + 1);
|
||
if (!ebuf)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
/* Prepend numbers with a 0 if needed. */
|
||
if (elen && (*e & 0x80))
|
||
{
|
||
*ebuf = 0;
|
||
memcpy (ebuf+1, e, elen);
|
||
elen++;
|
||
}
|
||
else
|
||
memcpy (ebuf, e, elen);
|
||
|
||
err = gcry_sexp_build (&s_pkey, NULL, "(public-key(rsa(n%b)(e%b)))",
|
||
(int)mlen, mbuf, (int)elen, ebuf);
|
||
}
|
||
else if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_ECC)
|
||
{
|
||
char *format;
|
||
|
||
if (!app->app_local->keyattr[keyno].ecc.flags)
|
||
format = "(public-key(ecc(curve%s)(q%b)))";
|
||
else if (keyno == 1)
|
||
format = "(public-key(ecc(curve%s)(flags djb-tweak)(q%b)))";
|
||
else
|
||
format = "(public-key(ecc(curve%s)(flags eddsa)(q%b)))";
|
||
|
||
err = gcry_sexp_build (&s_pkey, NULL, format,
|
||
openpgp_oid_to_curve (app->app_local->keyattr[keyno].ecc.oid, 1),
|
||
(int)mlen, mbuf);
|
||
}
|
||
else
|
||
err = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
|
||
|
||
if (err)
|
||
goto leave;
|
||
|
||
len = gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, NULL, 0);
|
||
|
||
keybuf = xtrymalloc (len);
|
||
if (!keybuf)
|
||
{
|
||
gcry_sexp_release (s_pkey);
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, keybuf, len);
|
||
gcry_sexp_release (s_pkey);
|
||
|
||
app->app_local->pk[keyno].key = (unsigned char*)keybuf;
|
||
app->app_local->pk[keyno].keylen = len - 1; /* Decrement for trailing '\0' */
|
||
|
||
leave:
|
||
/* Set a flag to indicate that we tried to read the key. */
|
||
app->app_local->pk[keyno].read_done = 1;
|
||
|
||
xfree (buffer);
|
||
xfree (mbuf);
|
||
xfree (ebuf);
|
||
return 0;
|
||
}
|
||
#endif /* GNUPG_MAJOR_VERSION > 1 */
|
||
|
||
|
||
|
||
/* Send the KEYPAIRINFO back. KEYNO needs to be in the range [1,3].
|
||
This is used by the LEARN command. */
|
||
static gpg_error_t
|
||
send_keypair_info (app_t app, ctrl_t ctrl, int keyno)
|
||
{
|
||
gpg_error_t err = 0;
|
||
/* Note that GnuPG 1.x does not need this and it would be too time
|
||
consuming to send it just for the fun of it. */
|
||
#if GNUPG_MAJOR_VERSION > 1
|
||
unsigned char grip[20];
|
||
char gripstr[41];
|
||
char idbuf[50];
|
||
|
||
err = get_public_key (app, keyno);
|
||
if (err)
|
||
goto leave;
|
||
|
||
assert (keyno >= 1 && keyno <= 3);
|
||
if (!app->app_local->pk[keyno-1].key)
|
||
goto leave; /* No such key - ignore. */
|
||
|
||
err = keygrip_from_canon_sexp (app->app_local->pk[keyno-1].key,
|
||
app->app_local->pk[keyno-1].keylen,
|
||
grip);
|
||
if (err)
|
||
goto leave;
|
||
|
||
bin2hex (grip, 20, gripstr);
|
||
|
||
sprintf (idbuf, "OPENPGP.%d", keyno);
|
||
send_status_info (ctrl, "KEYPAIRINFO",
|
||
gripstr, 40,
|
||
idbuf, strlen (idbuf),
|
||
NULL, (size_t)0);
|
||
|
||
leave:
|
||
#endif /* GNUPG_MAJOR_VERSION > 1 */
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Handle the LEARN command for OpenPGP. */
|
||
static gpg_error_t
|
||
do_learn_status (app_t app, ctrl_t ctrl, unsigned int flags)
|
||
{
|
||
(void)flags;
|
||
|
||
do_getattr (app, ctrl, "EXTCAP");
|
||
do_getattr (app, ctrl, "DISP-NAME");
|
||
do_getattr (app, ctrl, "DISP-LANG");
|
||
do_getattr (app, ctrl, "DISP-SEX");
|
||
do_getattr (app, ctrl, "PUBKEY-URL");
|
||
do_getattr (app, ctrl, "LOGIN-DATA");
|
||
do_getattr (app, ctrl, "KEY-FPR");
|
||
if (app->card_version > 0x0100)
|
||
do_getattr (app, ctrl, "KEY-TIME");
|
||
do_getattr (app, ctrl, "CA-FPR");
|
||
do_getattr (app, ctrl, "CHV-STATUS");
|
||
do_getattr (app, ctrl, "SIG-COUNTER");
|
||
if (app->app_local->extcap.private_dos)
|
||
{
|
||
do_getattr (app, ctrl, "PRIVATE-DO-1");
|
||
do_getattr (app, ctrl, "PRIVATE-DO-2");
|
||
if (app->did_chv2)
|
||
do_getattr (app, ctrl, "PRIVATE-DO-3");
|
||
if (app->did_chv3)
|
||
do_getattr (app, ctrl, "PRIVATE-DO-4");
|
||
}
|
||
send_keypair_info (app, ctrl, 1);
|
||
send_keypair_info (app, ctrl, 2);
|
||
send_keypair_info (app, ctrl, 3);
|
||
/* Note: We do not send the Cardholder Certificate, because that is
|
||
relativly long and for OpenPGP applications not really needed. */
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Handle the READKEY command for OpenPGP. On success a canonical
|
||
encoded S-expression with the public key will get stored at PK and
|
||
its length (for assertions) at PKLEN; the caller must release that
|
||
buffer. On error PK and PKLEN are not changed and an error code is
|
||
returned. */
|
||
static gpg_error_t
|
||
do_readkey (app_t app, const char *keyid, unsigned char **pk, size_t *pklen)
|
||
{
|
||
#if GNUPG_MAJOR_VERSION > 1
|
||
gpg_error_t err;
|
||
int keyno;
|
||
unsigned char *buf;
|
||
|
||
if (!strcmp (keyid, "OPENPGP.1"))
|
||
keyno = 1;
|
||
else if (!strcmp (keyid, "OPENPGP.2"))
|
||
keyno = 2;
|
||
else if (!strcmp (keyid, "OPENPGP.3"))
|
||
keyno = 3;
|
||
else
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
|
||
err = get_public_key (app, keyno);
|
||
if (err)
|
||
return err;
|
||
|
||
buf = app->app_local->pk[keyno-1].key;
|
||
if (!buf)
|
||
return gpg_error (GPG_ERR_NO_PUBKEY);
|
||
*pklen = app->app_local->pk[keyno-1].keylen;;
|
||
*pk = xtrymalloc (*pklen);
|
||
if (!*pk)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
*pklen = 0;
|
||
return err;
|
||
}
|
||
memcpy (*pk, buf, *pklen);
|
||
return 0;
|
||
#else
|
||
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
|
||
#endif
|
||
}
|
||
|
||
/* Read the standard certificate of an OpenPGP v2 card. It is
|
||
returned in a freshly allocated buffer with that address stored at
|
||
CERT and the length of the certificate stored at CERTLEN. CERTID
|
||
needs to be set to "OPENPGP.3". */
|
||
static gpg_error_t
|
||
do_readcert (app_t app, const char *certid,
|
||
unsigned char **cert, size_t *certlen)
|
||
{
|
||
#if GNUPG_MAJOR_VERSION > 1
|
||
gpg_error_t err;
|
||
unsigned char *buffer;
|
||
size_t buflen;
|
||
void *relptr;
|
||
|
||
*cert = NULL;
|
||
*certlen = 0;
|
||
if (strcmp (certid, "OPENPGP.3"))
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
if (!app->app_local->extcap.is_v2)
|
||
return gpg_error (GPG_ERR_NOT_FOUND);
|
||
|
||
relptr = get_one_do (app, 0x7F21, &buffer, &buflen, NULL);
|
||
if (!relptr)
|
||
return gpg_error (GPG_ERR_NOT_FOUND);
|
||
|
||
if (!buflen)
|
||
err = gpg_error (GPG_ERR_NOT_FOUND);
|
||
else if (!(*cert = xtrymalloc (buflen)))
|
||
err = gpg_error_from_syserror ();
|
||
else
|
||
{
|
||
memcpy (*cert, buffer, buflen);
|
||
*certlen = buflen;
|
||
err = 0;
|
||
}
|
||
xfree (relptr);
|
||
return err;
|
||
#else
|
||
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
|
||
#endif
|
||
}
|
||
|
||
|
||
/* Decide if we use the pinpad of the reader for PIN input according
|
||
to the user preference on the card, and the capability of the
|
||
reader. This routine is only called when the reader has pinpad.
|
||
Returns 0 if we use pinpad, 1 otherwise. */
|
||
static int
|
||
check_pinpad_request (app_t app, pininfo_t *pininfo, int admin_pin)
|
||
{
|
||
if (app->app_local->pinpad.specified == 0) /* No preference on card. */
|
||
{
|
||
if (pininfo->fixedlen == 0) /* Reader has varlen capability. */
|
||
return 0; /* Then, use pinpad. */
|
||
else
|
||
/*
|
||
* Reader has limited capability, and it may not match PIN of
|
||
* the card.
|
||
*/
|
||
return 1;
|
||
}
|
||
|
||
if (admin_pin)
|
||
pininfo->fixedlen = app->app_local->pinpad.fixedlen_admin;
|
||
else
|
||
pininfo->fixedlen = app->app_local->pinpad.fixedlen_user;
|
||
|
||
if (pininfo->fixedlen == 0 /* User requests disable pinpad. */
|
||
|| pininfo->fixedlen < pininfo->minlen
|
||
|| pininfo->fixedlen > pininfo->maxlen
|
||
/* Reader doesn't have the capability to input a PIN which
|
||
* length is FIXEDLEN. */)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Verify a CHV either using using the pinentry or if possibile by
|
||
using a pinpad. PINCB and PINCB_ARG describe the usual callback
|
||
for the pinentry. CHVNO must be either 1 or 2. SIGCOUNT is only
|
||
used with CHV1. PINVALUE is the address of a pointer which will
|
||
receive a newly allocated block with the actual PIN (this is useful
|
||
in case that PIN shall be used for another verify operation). The
|
||
caller needs to free this value. If the function returns with
|
||
success and NULL is stored at PINVALUE, the caller should take this
|
||
as an indication that the pinpad has been used.
|
||
*/
|
||
static gpg_error_t
|
||
verify_a_chv (app_t app,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg,
|
||
int chvno, unsigned long sigcount, char **pinvalue)
|
||
{
|
||
int rc = 0;
|
||
char *prompt_buffer = NULL;
|
||
const char *prompt;
|
||
pininfo_t pininfo;
|
||
int minlen = 6;
|
||
|
||
assert (chvno == 1 || chvno == 2);
|
||
|
||
*pinvalue = NULL;
|
||
|
||
if (chvno == 2 && app->app_local->flags.def_chv2)
|
||
{
|
||
/* Special case for def_chv2 mechanism. */
|
||
if (opt.verbose)
|
||
log_info (_("using default PIN as %s\n"), "CHV2");
|
||
rc = iso7816_verify (app->slot, 0x82, "123456", 6);
|
||
if (rc)
|
||
{
|
||
/* Verification of CHV2 with the default PIN failed,
|
||
although the card pretends to have the default PIN set as
|
||
CHV2. We better disable the def_chv2 flag now. */
|
||
log_info (_("failed to use default PIN as %s: %s"
|
||
" - disabling further default use\n"),
|
||
"CHV2", gpg_strerror (rc));
|
||
app->app_local->flags.def_chv2 = 0;
|
||
}
|
||
return rc;
|
||
}
|
||
|
||
memset (&pininfo, 0, sizeof pininfo);
|
||
pininfo.fixedlen = -1;
|
||
pininfo.minlen = minlen;
|
||
|
||
|
||
if (chvno == 1)
|
||
{
|
||
#define PROMPTSTRING _("||Please enter the PIN%%0A[sigs done: %lu]")
|
||
size_t promptsize = strlen (PROMPTSTRING) + 50;
|
||
|
||
prompt_buffer = xtrymalloc (promptsize);
|
||
if (!prompt_buffer)
|
||
return gpg_error_from_syserror ();
|
||
snprintf (prompt_buffer, promptsize-1, PROMPTSTRING, sigcount);
|
||
prompt = prompt_buffer;
|
||
#undef PROMPTSTRING
|
||
}
|
||
else
|
||
prompt = _("||Please enter the PIN");
|
||
|
||
|
||
if (!opt.disable_pinpad
|
||
&& !iso7816_check_pinpad (app->slot, ISO7816_VERIFY, &pininfo)
|
||
&& !check_pinpad_request (app, &pininfo, 0))
|
||
{
|
||
/* The reader supports the verify command through the pinpad.
|
||
Note that the pincb appends a text to the prompt telling the
|
||
user to use the pinpad. */
|
||
rc = pincb (pincb_arg, prompt, NULL);
|
||
prompt = NULL;
|
||
xfree (prompt_buffer);
|
||
prompt_buffer = NULL;
|
||
if (rc)
|
||
{
|
||
log_info (_("PIN callback returned error: %s\n"),
|
||
gpg_strerror (rc));
|
||
return rc;
|
||
}
|
||
rc = iso7816_verify_kp (app->slot, 0x80+chvno, &pininfo);
|
||
/* Dismiss the prompt. */
|
||
pincb (pincb_arg, NULL, NULL);
|
||
|
||
assert (!*pinvalue);
|
||
}
|
||
else
|
||
{
|
||
/* The reader has no pinpad or we don't want to use it. */
|
||
rc = pincb (pincb_arg, prompt, pinvalue);
|
||
prompt = NULL;
|
||
xfree (prompt_buffer);
|
||
prompt_buffer = NULL;
|
||
if (rc)
|
||
{
|
||
log_info (_("PIN callback returned error: %s\n"),
|
||
gpg_strerror (rc));
|
||
return rc;
|
||
}
|
||
|
||
if (strlen (*pinvalue) < minlen)
|
||
{
|
||
log_error (_("PIN for CHV%d is too short;"
|
||
" minimum length is %d\n"), chvno, minlen);
|
||
xfree (*pinvalue);
|
||
*pinvalue = NULL;
|
||
return gpg_error (GPG_ERR_BAD_PIN);
|
||
}
|
||
|
||
rc = iso7816_verify (app->slot, 0x80+chvno,
|
||
*pinvalue, strlen (*pinvalue));
|
||
}
|
||
|
||
if (rc)
|
||
{
|
||
log_error (_("verify CHV%d failed: %s\n"), chvno, gpg_strerror (rc));
|
||
xfree (*pinvalue);
|
||
*pinvalue = NULL;
|
||
flush_cache_after_error (app);
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
/* Verify CHV2 if required. Depending on the configuration of the
|
||
card CHV1 will also be verified. */
|
||
static gpg_error_t
|
||
verify_chv2 (app_t app,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg)
|
||
{
|
||
int rc;
|
||
char *pinvalue;
|
||
|
||
if (app->did_chv2)
|
||
return 0; /* We already verified CHV2. */
|
||
|
||
rc = verify_a_chv (app, pincb, pincb_arg, 2, 0, &pinvalue);
|
||
if (rc)
|
||
return rc;
|
||
app->did_chv2 = 1;
|
||
|
||
if (!app->did_chv1 && !app->force_chv1 && pinvalue)
|
||
{
|
||
/* For convenience we verify CHV1 here too. We do this only if
|
||
the card is not configured to require a verification before
|
||
each CHV1 controlled operation (force_chv1) and if we are not
|
||
using the pinpad (PINVALUE == NULL). */
|
||
rc = iso7816_verify (app->slot, 0x81, pinvalue, strlen (pinvalue));
|
||
if (gpg_err_code (rc) == GPG_ERR_BAD_PIN)
|
||
rc = gpg_error (GPG_ERR_PIN_NOT_SYNCED);
|
||
if (rc)
|
||
{
|
||
log_error (_("verify CHV%d failed: %s\n"), 1, gpg_strerror (rc));
|
||
flush_cache_after_error (app);
|
||
}
|
||
else
|
||
app->did_chv1 = 1;
|
||
}
|
||
|
||
xfree (pinvalue);
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
/* Build the prompt to enter the Admin PIN. The prompt depends on the
|
||
current sdtate of the card. */
|
||
static gpg_error_t
|
||
build_enter_admin_pin_prompt (app_t app, char **r_prompt)
|
||
{
|
||
void *relptr;
|
||
unsigned char *value;
|
||
size_t valuelen;
|
||
int remaining;
|
||
char *prompt;
|
||
|
||
*r_prompt = NULL;
|
||
|
||
relptr = get_one_do (app, 0x00C4, &value, &valuelen, NULL);
|
||
if (!relptr || valuelen < 7)
|
||
{
|
||
log_error (_("error retrieving CHV status from card\n"));
|
||
xfree (relptr);
|
||
return gpg_error (GPG_ERR_CARD);
|
||
}
|
||
if (value[6] == 0)
|
||
{
|
||
log_info (_("card is permanently locked!\n"));
|
||
xfree (relptr);
|
||
return gpg_error (GPG_ERR_BAD_PIN);
|
||
}
|
||
remaining = value[6];
|
||
xfree (relptr);
|
||
|
||
log_info(_("%d Admin PIN attempts remaining before card"
|
||
" is permanently locked\n"), remaining);
|
||
|
||
if (remaining < 3)
|
||
{
|
||
/* TRANSLATORS: Do not translate the "|A|" prefix but keep it at
|
||
the start of the string. Use %%0A to force a linefeed. */
|
||
prompt = xtryasprintf (_("|A|Please enter the Admin PIN%%0A"
|
||
"[remaining attempts: %d]"), remaining);
|
||
}
|
||
else
|
||
prompt = xtrystrdup (_("|A|Please enter the Admin PIN"));
|
||
|
||
if (!prompt)
|
||
return gpg_error_from_syserror ();
|
||
|
||
*r_prompt = prompt;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Verify CHV3 if required. */
|
||
static gpg_error_t
|
||
verify_chv3 (app_t app,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg)
|
||
{
|
||
int rc = 0;
|
||
|
||
#if GNUPG_MAJOR_VERSION != 1
|
||
if (!opt.allow_admin)
|
||
{
|
||
log_info (_("access to admin commands is not configured\n"));
|
||
return gpg_error (GPG_ERR_EACCES);
|
||
}
|
||
#endif
|
||
|
||
if (!app->did_chv3)
|
||
{
|
||
pininfo_t pininfo;
|
||
int minlen = 8;
|
||
char *prompt;
|
||
|
||
memset (&pininfo, 0, sizeof pininfo);
|
||
pininfo.fixedlen = -1;
|
||
pininfo.minlen = minlen;
|
||
|
||
rc = build_enter_admin_pin_prompt (app, &prompt);
|
||
if (rc)
|
||
return rc;
|
||
|
||
if (!opt.disable_pinpad
|
||
&& !iso7816_check_pinpad (app->slot, ISO7816_VERIFY, &pininfo)
|
||
&& !check_pinpad_request (app, &pininfo, 1))
|
||
{
|
||
/* The reader supports the verify command through the pinpad. */
|
||
rc = pincb (pincb_arg, prompt, NULL);
|
||
xfree (prompt);
|
||
prompt = NULL;
|
||
if (rc)
|
||
{
|
||
log_info (_("PIN callback returned error: %s\n"),
|
||
gpg_strerror (rc));
|
||
return rc;
|
||
}
|
||
rc = iso7816_verify_kp (app->slot, 0x83, &pininfo);
|
||
/* Dismiss the prompt. */
|
||
pincb (pincb_arg, NULL, NULL);
|
||
}
|
||
else
|
||
{
|
||
char *pinvalue;
|
||
|
||
rc = pincb (pincb_arg, prompt, &pinvalue);
|
||
xfree (prompt);
|
||
prompt = NULL;
|
||
if (rc)
|
||
{
|
||
log_info (_("PIN callback returned error: %s\n"),
|
||
gpg_strerror (rc));
|
||
return rc;
|
||
}
|
||
|
||
if (strlen (pinvalue) < minlen)
|
||
{
|
||
log_error (_("PIN for CHV%d is too short;"
|
||
" minimum length is %d\n"), 3, minlen);
|
||
xfree (pinvalue);
|
||
return gpg_error (GPG_ERR_BAD_PIN);
|
||
}
|
||
|
||
rc = iso7816_verify (app->slot, 0x83, pinvalue, strlen (pinvalue));
|
||
xfree (pinvalue);
|
||
}
|
||
|
||
if (rc)
|
||
{
|
||
log_error (_("verify CHV%d failed: %s\n"), 3, gpg_strerror (rc));
|
||
flush_cache_after_error (app);
|
||
return rc;
|
||
}
|
||
app->did_chv3 = 1;
|
||
}
|
||
return rc;
|
||
}
|
||
|
||
|
||
/* Handle the SETATTR operation. All arguments are already basically
|
||
checked. */
|
||
static gpg_error_t
|
||
do_setattr (app_t app, const char *name,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg,
|
||
const unsigned char *value, size_t valuelen)
|
||
{
|
||
gpg_error_t rc;
|
||
int idx;
|
||
static struct {
|
||
const char *name;
|
||
int tag;
|
||
int need_chv;
|
||
int special;
|
||
unsigned int need_v2:1;
|
||
} table[] = {
|
||
{ "DISP-NAME", 0x005B, 3 },
|
||
{ "LOGIN-DATA", 0x005E, 3, 2 },
|
||
{ "DISP-LANG", 0x5F2D, 3 },
|
||
{ "DISP-SEX", 0x5F35, 3 },
|
||
{ "PUBKEY-URL", 0x5F50, 3 },
|
||
{ "CHV-STATUS-1", 0x00C4, 3, 1 },
|
||
{ "CA-FPR-1", 0x00CA, 3 },
|
||
{ "CA-FPR-2", 0x00CB, 3 },
|
||
{ "CA-FPR-3", 0x00CC, 3 },
|
||
{ "PRIVATE-DO-1", 0x0101, 2 },
|
||
{ "PRIVATE-DO-2", 0x0102, 3 },
|
||
{ "PRIVATE-DO-3", 0x0103, 2 },
|
||
{ "PRIVATE-DO-4", 0x0104, 3 },
|
||
{ "CERT-3", 0x7F21, 3, 0, 1 },
|
||
{ "SM-KEY-ENC", 0x00D1, 3, 0, 1 },
|
||
{ "SM-KEY-MAC", 0x00D2, 3, 0, 1 },
|
||
{ "KEY-ATTR", 0, 0, 3, 1 },
|
||
{ "AESKEY", 0x00D5, 3, 0, 1 },
|
||
{ NULL, 0 }
|
||
};
|
||
int exmode;
|
||
|
||
for (idx=0; table[idx].name && strcmp (table[idx].name, name); idx++)
|
||
;
|
||
if (!table[idx].name)
|
||
return gpg_error (GPG_ERR_INV_NAME);
|
||
if (table[idx].need_v2 && !app->app_local->extcap.is_v2)
|
||
return gpg_error (GPG_ERR_NOT_SUPPORTED); /* Not yet supported. */
|
||
|
||
if (table[idx].special == 3)
|
||
return change_keyattr_from_string (app, pincb, pincb_arg, value, valuelen);
|
||
|
||
switch (table[idx].need_chv)
|
||
{
|
||
case 2:
|
||
rc = verify_chv2 (app, pincb, pincb_arg);
|
||
break;
|
||
case 3:
|
||
rc = verify_chv3 (app, pincb, pincb_arg);
|
||
break;
|
||
default:
|
||
rc = 0;
|
||
}
|
||
if (rc)
|
||
return rc;
|
||
|
||
/* Flush the cache before writing it, so that the next get operation
|
||
will reread the data from the card and thus get synced in case of
|
||
errors (e.g. data truncated by the card). */
|
||
flush_cache_item (app, table[idx].tag);
|
||
|
||
if (app->app_local->cardcap.ext_lc_le && valuelen > 254)
|
||
exmode = 1; /* Use extended length w/o a limit. */
|
||
else if (app->app_local->cardcap.cmd_chaining && valuelen > 254)
|
||
exmode = -254; /* Command chaining with max. 254 bytes. */
|
||
else
|
||
exmode = 0;
|
||
rc = iso7816_put_data (app->slot, exmode, table[idx].tag, value, valuelen);
|
||
if (rc)
|
||
log_error ("failed to set '%s': %s\n", table[idx].name, gpg_strerror (rc));
|
||
|
||
if (table[idx].special == 1)
|
||
app->force_chv1 = (valuelen && *value == 0);
|
||
else if (table[idx].special == 2)
|
||
parse_login_data (app);
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
/* Handle the WRITECERT command for OpenPGP. This rites the standard
|
||
certifciate to the card; CERTID needs to be set to "OPENPGP.3".
|
||
PINCB and PINCB_ARG are the usual arguments for the pinentry
|
||
callback. */
|
||
static gpg_error_t
|
||
do_writecert (app_t app, ctrl_t ctrl,
|
||
const char *certidstr,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg,
|
||
const unsigned char *certdata, size_t certdatalen)
|
||
{
|
||
(void)ctrl;
|
||
#if GNUPG_MAJOR_VERSION > 1
|
||
if (strcmp (certidstr, "OPENPGP.3"))
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
if (!certdata || !certdatalen)
|
||
return gpg_error (GPG_ERR_INV_ARG);
|
||
if (!app->app_local->extcap.is_v2)
|
||
return gpg_error (GPG_ERR_NOT_SUPPORTED);
|
||
if (certdatalen > app->app_local->extcap.max_certlen_3)
|
||
return gpg_error (GPG_ERR_TOO_LARGE);
|
||
return do_setattr (app, "CERT-3", pincb, pincb_arg, certdata, certdatalen);
|
||
#else
|
||
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
|
||
#endif
|
||
}
|
||
|
||
|
||
|
||
/* Handle the PASSWD command. The following combinations are
|
||
possible:
|
||
|
||
Flags CHVNO Vers. Description
|
||
RESET 1 1 Verify CHV3 and set a new CHV1 and CHV2
|
||
RESET 1 2 Verify PW3 and set a new PW1.
|
||
RESET 2 1 Verify CHV3 and set a new CHV1 and CHV2.
|
||
RESET 2 2 Verify PW3 and set a new Reset Code.
|
||
RESET 3 any Returns GPG_ERR_INV_ID.
|
||
- 1 1 Verify CHV2 and set a new CHV1 and CHV2.
|
||
- 1 2 Verify PW1 and set a new PW1.
|
||
- 2 1 Verify CHV2 and set a new CHV1 and CHV2.
|
||
- 2 2 Verify Reset Code and set a new PW1.
|
||
- 3 any Verify CHV3/PW3 and set a new CHV3/PW3.
|
||
*/
|
||
static gpg_error_t
|
||
do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr,
|
||
unsigned int flags,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg)
|
||
{
|
||
int rc = 0;
|
||
int chvno = atoi (chvnostr);
|
||
char *resetcode = NULL;
|
||
char *oldpinvalue = NULL;
|
||
char *pinvalue = NULL;
|
||
int reset_mode = !!(flags & APP_CHANGE_FLAG_RESET);
|
||
int set_resetcode = 0;
|
||
pininfo_t pininfo;
|
||
int use_pinpad = 0;
|
||
int minlen = 6;
|
||
|
||
(void)ctrl;
|
||
memset (&pininfo, 0, sizeof pininfo);
|
||
pininfo.fixedlen = -1;
|
||
pininfo.minlen = minlen;
|
||
|
||
if (reset_mode && chvno == 3)
|
||
{
|
||
rc = gpg_error (GPG_ERR_INV_ID);
|
||
goto leave;
|
||
}
|
||
|
||
if (!app->app_local->extcap.is_v2)
|
||
{
|
||
/* Version 1 cards. */
|
||
|
||
if (reset_mode || chvno == 3)
|
||
{
|
||
/* We always require that the PIN is entered. */
|
||
app->did_chv3 = 0;
|
||
rc = verify_chv3 (app, pincb, pincb_arg);
|
||
if (rc)
|
||
goto leave;
|
||
}
|
||
else if (chvno == 1 || chvno == 2)
|
||
{
|
||
/* On a v1.x card CHV1 and CVH2 should always have the same
|
||
value, thus we enforce it here. */
|
||
int save_force = app->force_chv1;
|
||
|
||
app->force_chv1 = 0;
|
||
app->did_chv1 = 0;
|
||
app->did_chv2 = 0;
|
||
rc = verify_chv2 (app, pincb, pincb_arg);
|
||
app->force_chv1 = save_force;
|
||
if (rc)
|
||
goto leave;
|
||
}
|
||
else
|
||
{
|
||
rc = gpg_error (GPG_ERR_INV_ID);
|
||
goto leave;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Version 2 cards. */
|
||
|
||
if (!opt.disable_pinpad
|
||
&& !iso7816_check_pinpad (app->slot,
|
||
ISO7816_CHANGE_REFERENCE_DATA, &pininfo)
|
||
&& !check_pinpad_request (app, &pininfo, chvno == 3))
|
||
use_pinpad = 1;
|
||
|
||
if (reset_mode)
|
||
{
|
||
/* To reset a PIN the Admin PIN is required. */
|
||
use_pinpad = 0;
|
||
app->did_chv3 = 0;
|
||
rc = verify_chv3 (app, pincb, pincb_arg);
|
||
if (rc)
|
||
goto leave;
|
||
|
||
if (chvno == 2)
|
||
set_resetcode = 1;
|
||
}
|
||
else if (chvno == 1 || chvno == 3)
|
||
{
|
||
if (!use_pinpad)
|
||
{
|
||
char *promptbuf = NULL;
|
||
const char *prompt;
|
||
|
||
if (chvno == 3)
|
||
{
|
||
minlen = 8;
|
||
rc = build_enter_admin_pin_prompt (app, &promptbuf);
|
||
if (rc)
|
||
goto leave;
|
||
prompt = promptbuf;
|
||
}
|
||
else
|
||
prompt = _("||Please enter the PIN");
|
||
rc = pincb (pincb_arg, prompt, &oldpinvalue);
|
||
xfree (promptbuf);
|
||
promptbuf = NULL;
|
||
if (rc)
|
||
{
|
||
log_info (_("PIN callback returned error: %s\n"),
|
||
gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
|
||
if (strlen (oldpinvalue) < minlen)
|
||
{
|
||
log_info (_("PIN for CHV%d is too short;"
|
||
" minimum length is %d\n"), chvno, minlen);
|
||
rc = gpg_error (GPG_ERR_BAD_PIN);
|
||
goto leave;
|
||
}
|
||
}
|
||
}
|
||
else if (chvno == 2)
|
||
{
|
||
/* There is no PW2 for v2 cards. We use this condition to
|
||
allow a PW reset using the Reset Code. */
|
||
void *relptr;
|
||
unsigned char *value;
|
||
size_t valuelen;
|
||
int remaining;
|
||
|
||
use_pinpad = 0;
|
||
minlen = 8;
|
||
relptr = get_one_do (app, 0x00C4, &value, &valuelen, NULL);
|
||
if (!relptr || valuelen < 7)
|
||
{
|
||
log_error (_("error retrieving CHV status from card\n"));
|
||
xfree (relptr);
|
||
rc = gpg_error (GPG_ERR_CARD);
|
||
goto leave;
|
||
}
|
||
remaining = value[5];
|
||
xfree (relptr);
|
||
if (!remaining)
|
||
{
|
||
log_error (_("Reset Code not or not anymore available\n"));
|
||
rc = gpg_error (GPG_ERR_BAD_PIN);
|
||
goto leave;
|
||
}
|
||
|
||
rc = pincb (pincb_arg,
|
||
_("||Please enter the Reset Code for the card"),
|
||
&resetcode);
|
||
if (rc)
|
||
{
|
||
log_info (_("PIN callback returned error: %s\n"),
|
||
gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
if (strlen (resetcode) < minlen)
|
||
{
|
||
log_info (_("Reset Code is too short; minimum length is %d\n"),
|
||
minlen);
|
||
rc = gpg_error (GPG_ERR_BAD_PIN);
|
||
goto leave;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
rc = gpg_error (GPG_ERR_INV_ID);
|
||
goto leave;
|
||
}
|
||
}
|
||
|
||
if (chvno == 3)
|
||
app->did_chv3 = 0;
|
||
else
|
||
app->did_chv1 = app->did_chv2 = 0;
|
||
|
||
if (!use_pinpad)
|
||
{
|
||
/* TRANSLATORS: Do not translate the "|*|" prefixes but
|
||
keep it at the start of the string. We need this elsewhere
|
||
to get some infos on the string. */
|
||
rc = pincb (pincb_arg, set_resetcode? _("|RN|New Reset Code") :
|
||
chvno == 3? _("|AN|New Admin PIN") : _("|N|New PIN"),
|
||
&pinvalue);
|
||
if (rc)
|
||
{
|
||
log_error (_("error getting new PIN: %s\n"), gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
}
|
||
|
||
|
||
if (resetcode)
|
||
{
|
||
char *buffer;
|
||
|
||
buffer = xtrymalloc (strlen (resetcode) + strlen (pinvalue) + 1);
|
||
if (!buffer)
|
||
rc = gpg_error_from_syserror ();
|
||
else
|
||
{
|
||
strcpy (stpcpy (buffer, resetcode), pinvalue);
|
||
rc = iso7816_reset_retry_counter_with_rc (app->slot, 0x81,
|
||
buffer, strlen (buffer));
|
||
wipememory (buffer, strlen (buffer));
|
||
xfree (buffer);
|
||
}
|
||
}
|
||
else if (set_resetcode)
|
||
{
|
||
if (strlen (pinvalue) < 8)
|
||
{
|
||
log_error (_("Reset Code is too short; minimum length is %d\n"), 8);
|
||
rc = gpg_error (GPG_ERR_BAD_PIN);
|
||
}
|
||
else
|
||
rc = iso7816_put_data (app->slot, 0, 0xD3,
|
||
pinvalue, strlen (pinvalue));
|
||
}
|
||
else if (reset_mode)
|
||
{
|
||
rc = iso7816_reset_retry_counter (app->slot, 0x81,
|
||
pinvalue, strlen (pinvalue));
|
||
if (!rc && !app->app_local->extcap.is_v2)
|
||
rc = iso7816_reset_retry_counter (app->slot, 0x82,
|
||
pinvalue, strlen (pinvalue));
|
||
}
|
||
else if (!app->app_local->extcap.is_v2)
|
||
{
|
||
/* Version 1 cards. */
|
||
if (chvno == 1 || chvno == 2)
|
||
{
|
||
rc = iso7816_change_reference_data (app->slot, 0x81, NULL, 0,
|
||
pinvalue, strlen (pinvalue));
|
||
if (!rc)
|
||
rc = iso7816_change_reference_data (app->slot, 0x82, NULL, 0,
|
||
pinvalue, strlen (pinvalue));
|
||
}
|
||
else /* CHVNO == 3 */
|
||
{
|
||
rc = iso7816_change_reference_data (app->slot, 0x80 + chvno, NULL, 0,
|
||
pinvalue, strlen (pinvalue));
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Version 2 cards. */
|
||
assert (chvno == 1 || chvno == 3);
|
||
|
||
if (use_pinpad)
|
||
{
|
||
rc = pincb (pincb_arg,
|
||
chvno == 3 ?
|
||
_("||Please enter the Admin PIN and New Admin PIN") :
|
||
_("||Please enter the PIN and New PIN"), NULL);
|
||
if (rc)
|
||
{
|
||
log_info (_("PIN callback returned error: %s\n"),
|
||
gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
rc = iso7816_change_reference_data_kp (app->slot, 0x80 + chvno, 0,
|
||
&pininfo);
|
||
pincb (pincb_arg, NULL, NULL); /* Dismiss the prompt. */
|
||
}
|
||
else
|
||
rc = iso7816_change_reference_data (app->slot, 0x80 + chvno,
|
||
oldpinvalue, strlen (oldpinvalue),
|
||
pinvalue, strlen (pinvalue));
|
||
}
|
||
|
||
if (pinvalue)
|
||
{
|
||
wipememory (pinvalue, strlen (pinvalue));
|
||
xfree (pinvalue);
|
||
}
|
||
if (rc)
|
||
flush_cache_after_error (app);
|
||
|
||
leave:
|
||
if (resetcode)
|
||
{
|
||
wipememory (resetcode, strlen (resetcode));
|
||
xfree (resetcode);
|
||
}
|
||
if (oldpinvalue)
|
||
{
|
||
wipememory (oldpinvalue, strlen (oldpinvalue));
|
||
xfree (oldpinvalue);
|
||
}
|
||
return rc;
|
||
}
|
||
|
||
|
||
/* Check whether a key already exists. KEYIDX is the index of the key
|
||
(0..2). If FORCE is TRUE a diagnositic will be printed but no
|
||
error returned if the key already exists. The flag GENERATING is
|
||
only used to print correct messages. */
|
||
static gpg_error_t
|
||
does_key_exist (app_t app, int keyidx, int generating, int force)
|
||
{
|
||
const unsigned char *fpr;
|
||
unsigned char *buffer;
|
||
size_t buflen, n;
|
||
int i;
|
||
|
||
assert (keyidx >=0 && keyidx <= 2);
|
||
|
||
if (iso7816_get_data (app->slot, 0, 0x006E, &buffer, &buflen))
|
||
{
|
||
log_error (_("error reading application data\n"));
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
fpr = find_tlv (buffer, buflen, 0x00C5, &n);
|
||
if (!fpr || n < 60)
|
||
{
|
||
log_error (_("error reading fingerprint DO\n"));
|
||
xfree (buffer);
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
fpr += 20*keyidx;
|
||
for (i=0; i < 20 && !fpr[i]; i++)
|
||
;
|
||
xfree (buffer);
|
||
if (i!=20 && !force)
|
||
{
|
||
log_error (_("key already exists\n"));
|
||
return gpg_error (GPG_ERR_EEXIST);
|
||
}
|
||
else if (i!=20)
|
||
log_info (_("existing key will be replaced\n"));
|
||
else if (generating)
|
||
log_info (_("generating new key\n"));
|
||
else
|
||
log_info (_("writing new key\n"));
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Create a TLV tag and value and store it at BUFFER. Return the length
|
||
of tag and length. A LENGTH greater than 65535 is truncated. */
|
||
static size_t
|
||
add_tlv (unsigned char *buffer, unsigned int tag, size_t length)
|
||
{
|
||
unsigned char *p = buffer;
|
||
|
||
assert (tag <= 0xffff);
|
||
if ( tag > 0xff )
|
||
*p++ = tag >> 8;
|
||
*p++ = tag;
|
||
if (length < 128)
|
||
*p++ = length;
|
||
else if (length < 256)
|
||
{
|
||
*p++ = 0x81;
|
||
*p++ = length;
|
||
}
|
||
else
|
||
{
|
||
if (length > 0xffff)
|
||
length = 0xffff;
|
||
*p++ = 0x82;
|
||
*p++ = length >> 8;
|
||
*p++ = length;
|
||
}
|
||
|
||
return p - buffer;
|
||
}
|
||
|
||
|
||
static gpg_error_t
|
||
build_privkey_template (app_t app, int keyno,
|
||
const unsigned char *rsa_n, size_t rsa_n_len,
|
||
const unsigned char *rsa_e, size_t rsa_e_len,
|
||
const unsigned char *rsa_p, size_t rsa_p_len,
|
||
const unsigned char *rsa_q, size_t rsa_q_len,
|
||
const unsigned char *rsa_u, size_t rsa_u_len,
|
||
const unsigned char *rsa_dp, size_t rsa_dp_len,
|
||
const unsigned char *rsa_dq, size_t rsa_dq_len,
|
||
unsigned char **result, size_t *resultlen)
|
||
{
|
||
size_t rsa_e_reqlen;
|
||
unsigned char privkey[7*(1+3+3)];
|
||
size_t privkey_len;
|
||
unsigned char exthdr[2+2+3];
|
||
size_t exthdr_len;
|
||
unsigned char suffix[2+3];
|
||
size_t suffix_len;
|
||
unsigned char *tp;
|
||
size_t datalen;
|
||
unsigned char *template;
|
||
size_t template_size;
|
||
|
||
*result = NULL;
|
||
*resultlen = 0;
|
||
|
||
switch (app->app_local->keyattr[keyno].rsa.format)
|
||
{
|
||
case RSA_STD:
|
||
case RSA_STD_N:
|
||
case RSA_CRT:
|
||
case RSA_CRT_N:
|
||
break;
|
||
|
||
default:
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
}
|
||
|
||
/* Get the required length for E. Rounded up to the nearest byte */
|
||
rsa_e_reqlen = (app->app_local->keyattr[keyno].rsa.e_bits + 7) / 8;
|
||
assert (rsa_e_len <= rsa_e_reqlen);
|
||
|
||
/* Build the 7f48 cardholder private key template. */
|
||
datalen = 0;
|
||
tp = privkey;
|
||
|
||
tp += add_tlv (tp, 0x91, rsa_e_reqlen);
|
||
datalen += rsa_e_reqlen;
|
||
|
||
tp += add_tlv (tp, 0x92, rsa_p_len);
|
||
datalen += rsa_p_len;
|
||
|
||
tp += add_tlv (tp, 0x93, rsa_q_len);
|
||
datalen += rsa_q_len;
|
||
|
||
if (app->app_local->keyattr[keyno].rsa.format == RSA_CRT
|
||
|| app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N)
|
||
{
|
||
tp += add_tlv (tp, 0x94, rsa_u_len);
|
||
datalen += rsa_u_len;
|
||
tp += add_tlv (tp, 0x95, rsa_dp_len);
|
||
datalen += rsa_dp_len;
|
||
tp += add_tlv (tp, 0x96, rsa_dq_len);
|
||
datalen += rsa_dq_len;
|
||
}
|
||
|
||
if (app->app_local->keyattr[keyno].rsa.format == RSA_STD_N
|
||
|| app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N)
|
||
{
|
||
tp += add_tlv (tp, 0x97, rsa_n_len);
|
||
datalen += rsa_n_len;
|
||
}
|
||
privkey_len = tp - privkey;
|
||
|
||
/* Build the extended header list without the private key template. */
|
||
tp = exthdr;
|
||
*tp++ = keyno ==0 ? 0xb6 : keyno == 1? 0xb8 : 0xa4;
|
||
*tp++ = 0;
|
||
tp += add_tlv (tp, 0x7f48, privkey_len);
|
||
exthdr_len = tp - exthdr;
|
||
|
||
/* Build the 5f48 suffix of the data. */
|
||
tp = suffix;
|
||
tp += add_tlv (tp, 0x5f48, datalen);
|
||
suffix_len = tp - suffix;
|
||
|
||
/* Now concatenate everything. */
|
||
template_size = (1 + 3 /* 0x4d and len. */
|
||
+ exthdr_len
|
||
+ privkey_len
|
||
+ suffix_len
|
||
+ datalen);
|
||
tp = template = xtrymalloc_secure (template_size);
|
||
if (!template)
|
||
return gpg_error_from_syserror ();
|
||
|
||
tp += add_tlv (tp, 0x4d, exthdr_len + privkey_len + suffix_len + datalen);
|
||
memcpy (tp, exthdr, exthdr_len);
|
||
tp += exthdr_len;
|
||
memcpy (tp, privkey, privkey_len);
|
||
tp += privkey_len;
|
||
memcpy (tp, suffix, suffix_len);
|
||
tp += suffix_len;
|
||
|
||
memcpy (tp, rsa_e, rsa_e_len);
|
||
if (rsa_e_len < rsa_e_reqlen)
|
||
{
|
||
/* Right justify E. */
|
||
memmove (tp + rsa_e_reqlen - rsa_e_len, tp, rsa_e_len);
|
||
memset (tp, 0, rsa_e_reqlen - rsa_e_len);
|
||
}
|
||
tp += rsa_e_reqlen;
|
||
|
||
memcpy (tp, rsa_p, rsa_p_len);
|
||
tp += rsa_p_len;
|
||
|
||
memcpy (tp, rsa_q, rsa_q_len);
|
||
tp += rsa_q_len;
|
||
|
||
if (app->app_local->keyattr[keyno].rsa.format == RSA_CRT
|
||
|| app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N)
|
||
{
|
||
memcpy (tp, rsa_u, rsa_u_len);
|
||
tp += rsa_u_len;
|
||
memcpy (tp, rsa_dp, rsa_dp_len);
|
||
tp += rsa_dp_len;
|
||
memcpy (tp, rsa_dq, rsa_dq_len);
|
||
tp += rsa_dq_len;
|
||
}
|
||
|
||
if (app->app_local->keyattr[keyno].rsa.format == RSA_STD_N
|
||
|| app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N)
|
||
{
|
||
memcpy (tp, rsa_n, rsa_n_len);
|
||
tp += rsa_n_len;
|
||
}
|
||
|
||
/* Sanity check. We don't know the exact length because we
|
||
allocated 3 bytes for the first length header. */
|
||
assert (tp - template <= template_size);
|
||
|
||
*result = template;
|
||
*resultlen = tp - template;
|
||
return 0;
|
||
}
|
||
|
||
static gpg_error_t
|
||
build_ecc_privkey_template (app_t app, int keyno,
|
||
const unsigned char *ecc_d, size_t ecc_d_len,
|
||
unsigned char **result, size_t *resultlen)
|
||
{
|
||
unsigned char privkey[2];
|
||
size_t privkey_len;
|
||
unsigned char exthdr[2+2+1];
|
||
size_t exthdr_len;
|
||
unsigned char suffix[2+1];
|
||
size_t suffix_len;
|
||
unsigned char *tp;
|
||
size_t datalen;
|
||
unsigned char *template;
|
||
size_t template_size;
|
||
|
||
(void)app;
|
||
|
||
*result = NULL;
|
||
*resultlen = 0;
|
||
|
||
/* Build the 7f48 cardholder private key template. */
|
||
datalen = 0;
|
||
tp = privkey;
|
||
|
||
tp += add_tlv (tp, 0x92, ecc_d_len);
|
||
datalen += ecc_d_len;
|
||
|
||
privkey_len = tp - privkey;
|
||
|
||
/* Build the extended header list without the private key template. */
|
||
tp = exthdr;
|
||
*tp++ = keyno ==0 ? 0xb6 : keyno == 1? 0xb8 : 0xa4;
|
||
*tp++ = 0;
|
||
tp += add_tlv (tp, 0x7f48, privkey_len);
|
||
exthdr_len = tp - exthdr;
|
||
|
||
/* Build the 5f48 suffix of the data. */
|
||
tp = suffix;
|
||
tp += add_tlv (tp, 0x5f48, datalen);
|
||
suffix_len = tp - suffix;
|
||
|
||
/* Now concatenate everything. */
|
||
template_size = (1 + 1 /* 0x4d and len. */
|
||
+ exthdr_len
|
||
+ privkey_len
|
||
+ suffix_len
|
||
+ datalen);
|
||
tp = template = xtrymalloc_secure (template_size);
|
||
if (!template)
|
||
return gpg_error_from_syserror ();
|
||
|
||
tp += add_tlv (tp, 0x4d, exthdr_len + privkey_len + suffix_len + datalen);
|
||
memcpy (tp, exthdr, exthdr_len);
|
||
tp += exthdr_len;
|
||
memcpy (tp, privkey, privkey_len);
|
||
tp += privkey_len;
|
||
memcpy (tp, suffix, suffix_len);
|
||
tp += suffix_len;
|
||
|
||
memcpy (tp, ecc_d, ecc_d_len);
|
||
tp += ecc_d_len;
|
||
|
||
assert (tp - template == template_size);
|
||
|
||
*result = template;
|
||
*resultlen = tp - template;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Helper for do_writekley to change the size of a key. Not ethat
|
||
this deletes the entire key without asking. */
|
||
static gpg_error_t
|
||
change_keyattr (app_t app, int keyno, const unsigned char *buf, size_t buflen,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg)
|
||
{
|
||
gpg_error_t err;
|
||
|
||
assert (keyno >=0 && keyno <= 2);
|
||
|
||
/* Prepare for storing the key. */
|
||
err = verify_chv3 (app, pincb, pincb_arg);
|
||
if (err)
|
||
return err;
|
||
|
||
/* Change the attribute. */
|
||
err = iso7816_put_data (app->slot, 0, 0xC1+keyno, buf, buflen);
|
||
if (err)
|
||
log_error ("error changing key attribute (key=%d)\n", keyno+1);
|
||
else
|
||
log_info ("key attribute changed (key=%d)\n", keyno+1);
|
||
flush_cache (app);
|
||
parse_algorithm_attribute (app, keyno);
|
||
app->did_chv1 = 0;
|
||
app->did_chv2 = 0;
|
||
app->did_chv3 = 0;
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Helper to process an setattr command for name KEY-ATTR.
|
||
In (VALUE,VALUELEN), it expects following string:
|
||
RSA: "--force <keyno> <algo> rsa<nbits>"
|
||
ECC: "--force <keyno> <algo> <curvename>"
|
||
*/
|
||
static gpg_error_t
|
||
change_keyattr_from_string (app_t app,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg,
|
||
const void *value, size_t valuelen)
|
||
{
|
||
gpg_error_t err = 0;
|
||
char *string;
|
||
int keyno, algo;
|
||
int n = 0;
|
||
|
||
/* VALUE is expected to be a string but not guaranteed to be
|
||
terminated. Thus copy it to an allocated buffer first. */
|
||
string = xtrymalloc (valuelen+1);
|
||
if (!string)
|
||
return gpg_error_from_syserror ();
|
||
memcpy (string, value, valuelen);
|
||
string[valuelen] = 0;
|
||
|
||
/* Because this function deletes the key we require the string
|
||
"--force" in the data to make clear that something serious might
|
||
happen. */
|
||
sscanf (string, " --force %d %d %n", &keyno, &algo, &n);
|
||
if (n < 13)
|
||
{
|
||
err = gpg_error (GPG_ERR_INV_DATA);
|
||
goto leave;
|
||
}
|
||
|
||
if (keyno < 1 || keyno > 3)
|
||
err = gpg_error (GPG_ERR_INV_ID);
|
||
else if (algo == PUBKEY_ALGO_RSA)
|
||
{
|
||
unsigned int nbits;
|
||
|
||
errno = 0;
|
||
nbits = strtoul (string+n+3, NULL, 10);
|
||
if (errno)
|
||
err = gpg_error (GPG_ERR_INV_DATA);
|
||
else if (nbits < 1024)
|
||
err = gpg_error (GPG_ERR_TOO_SHORT);
|
||
else if (nbits > 4096)
|
||
err = gpg_error (GPG_ERR_TOO_LARGE);
|
||
else
|
||
{
|
||
unsigned char *buf;
|
||
size_t buflen;
|
||
void *relptr;
|
||
|
||
/* Read the current attributes into a buffer. */
|
||
relptr = get_one_do (app, 0xC1+keyno, &buf, &buflen, NULL);
|
||
if (!relptr)
|
||
{
|
||
err = gpg_error (GPG_ERR_CARD);
|
||
goto leave;
|
||
}
|
||
if (buflen < 6 || buf[0] != PUBKEY_ALGO_RSA)
|
||
{
|
||
/* Attriutes too short or not an RSA key. */
|
||
xfree (relptr);
|
||
err = gpg_error (GPG_ERR_CARD);
|
||
goto leave;
|
||
}
|
||
|
||
/* We only change n_bits and don't touch anything else. Before we
|
||
do so, we round up NBITS to a sensible way in the same way as
|
||
gpg's key generation does it. This may help to sort out problems
|
||
with a few bits too short keys. */
|
||
nbits = ((nbits + 31) / 32) * 32;
|
||
buf[1] = (nbits >> 8);
|
||
buf[2] = nbits;
|
||
err = change_keyattr (app, keyno-1, buf, buflen, pincb, pincb_arg);
|
||
xfree (relptr);
|
||
}
|
||
}
|
||
else if (algo == PUBKEY_ALGO_ECDH || algo == PUBKEY_ALGO_ECDSA
|
||
|| algo == PUBKEY_ALGO_EDDSA)
|
||
{
|
||
const char *oidstr;
|
||
|
||
oidstr = openpgp_curve_to_oid (string+n, NULL);
|
||
if (!oidstr)
|
||
err = gpg_error (GPG_ERR_INV_DATA);
|
||
else
|
||
{
|
||
gcry_mpi_t m;
|
||
|
||
err = openpgp_oid_from_str (oidstr, &m);
|
||
if (!err)
|
||
{
|
||
unsigned int len;
|
||
const unsigned char *buf = gcry_mpi_get_opaque (m, &len);
|
||
|
||
/* We have enough room at STRING. */
|
||
len = buf[0];
|
||
string[0] = algo;
|
||
memcpy (string+1, buf+1, len++);
|
||
err = change_keyattr (app, keyno-1, string, len,
|
||
pincb, pincb_arg);
|
||
gcry_mpi_release (m);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
err = gpg_error (GPG_ERR_PUBKEY_ALGO);
|
||
|
||
leave:
|
||
xfree (string);
|
||
return err;
|
||
}
|
||
|
||
|
||
static gpg_error_t
|
||
rsa_writekey (app_t app, gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg, int keyno,
|
||
const unsigned char *buf, size_t buflen, int depth)
|
||
{
|
||
gpg_error_t err;
|
||
const unsigned char *tok;
|
||
size_t toklen;
|
||
int last_depth1, last_depth2;
|
||
const unsigned char *rsa_n = NULL;
|
||
const unsigned char *rsa_e = NULL;
|
||
const unsigned char *rsa_p = NULL;
|
||
const unsigned char *rsa_q = NULL;
|
||
size_t rsa_n_len, rsa_e_len, rsa_p_len, rsa_q_len;
|
||
unsigned int nbits;
|
||
unsigned int maxbits;
|
||
unsigned char *template = NULL;
|
||
unsigned char *tp;
|
||
size_t template_len;
|
||
unsigned char fprbuf[20];
|
||
u32 created_at = 0;
|
||
|
||
if (app->app_local->keyattr[keyno].key_type != KEY_TYPE_RSA)
|
||
{
|
||
log_error (_("unsupported algorithm: %s"), "RSA");
|
||
err = gpg_error (GPG_ERR_INV_VALUE);
|
||
goto leave;
|
||
}
|
||
|
||
last_depth1 = depth;
|
||
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
|
||
&& depth && depth >= last_depth1)
|
||
{
|
||
if (tok)
|
||
{
|
||
err = gpg_error (GPG_ERR_UNKNOWN_SEXP);
|
||
goto leave;
|
||
}
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if (tok && toklen == 1)
|
||
{
|
||
const unsigned char **mpi;
|
||
size_t *mpi_len;
|
||
|
||
switch (*tok)
|
||
{
|
||
case 'n': mpi = &rsa_n; mpi_len = &rsa_n_len; break;
|
||
case 'e': mpi = &rsa_e; mpi_len = &rsa_e_len; break;
|
||
case 'p': mpi = &rsa_p; mpi_len = &rsa_p_len; break;
|
||
case 'q': mpi = &rsa_q; mpi_len = &rsa_q_len;break;
|
||
default: mpi = NULL; mpi_len = NULL; break;
|
||
}
|
||
if (mpi && *mpi)
|
||
{
|
||
err = gpg_error (GPG_ERR_DUP_VALUE);
|
||
goto leave;
|
||
}
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if (tok && mpi)
|
||
{
|
||
/* Strip off leading zero bytes and save. */
|
||
for (;toklen && !*tok; toklen--, tok++)
|
||
;
|
||
*mpi = tok;
|
||
*mpi_len = toklen;
|
||
}
|
||
}
|
||
/* Skip until end of list. */
|
||
last_depth2 = depth;
|
||
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
|
||
&& depth && depth >= last_depth2)
|
||
;
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
/* Parse other attributes. */
|
||
last_depth1 = depth;
|
||
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
|
||
&& depth && depth >= last_depth1)
|
||
{
|
||
if (tok)
|
||
{
|
||
err = gpg_error (GPG_ERR_UNKNOWN_SEXP);
|
||
goto leave;
|
||
}
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if (tok && toklen == 10 && !memcmp ("created-at", tok, toklen))
|
||
{
|
||
if ((err = parse_sexp (&buf,&buflen,&depth,&tok,&toklen)))
|
||
goto leave;
|
||
if (tok)
|
||
{
|
||
for (created_at=0; toklen && *tok && *tok >= '0' && *tok <= '9';
|
||
tok++, toklen--)
|
||
created_at = created_at*10 + (*tok - '0');
|
||
}
|
||
}
|
||
/* Skip until end of list. */
|
||
last_depth2 = depth;
|
||
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
|
||
&& depth && depth >= last_depth2)
|
||
;
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
|
||
|
||
/* Check that we have all parameters and that they match the card
|
||
description. */
|
||
if (!created_at)
|
||
{
|
||
log_error (_("creation timestamp missing\n"));
|
||
err = gpg_error (GPG_ERR_INV_VALUE);
|
||
goto leave;
|
||
}
|
||
|
||
maxbits = app->app_local->keyattr[keyno].rsa.n_bits;
|
||
nbits = rsa_n? count_bits (rsa_n, rsa_n_len) : 0;
|
||
if (opt.verbose)
|
||
log_info ("RSA modulus size is %u bits (%u bytes)\n",
|
||
nbits, (unsigned int)rsa_n_len);
|
||
if (nbits != maxbits)
|
||
{
|
||
log_error (_("RSA modulus missing or not of size %d bits\n"),
|
||
(int)maxbits);
|
||
err = gpg_error (GPG_ERR_BAD_SECKEY);
|
||
goto leave;
|
||
}
|
||
|
||
maxbits = app->app_local->keyattr[keyno].rsa.e_bits;
|
||
if (maxbits > 32 && !app->app_local->extcap.is_v2)
|
||
maxbits = 32; /* Our code for v1 does only support 32 bits. */
|
||
nbits = rsa_e? count_bits (rsa_e, rsa_e_len) : 0;
|
||
if (nbits < 2 || nbits > maxbits)
|
||
{
|
||
log_error (_("RSA public exponent missing or larger than %d bits\n"),
|
||
(int)maxbits);
|
||
err = gpg_error (GPG_ERR_BAD_SECKEY);
|
||
goto leave;
|
||
}
|
||
|
||
maxbits = app->app_local->keyattr[keyno].rsa.n_bits/2;
|
||
nbits = rsa_p? count_bits (rsa_p, rsa_p_len) : 0;
|
||
if (nbits != maxbits)
|
||
{
|
||
log_error (_("RSA prime %s missing or not of size %d bits\n"),
|
||
"P", (int)maxbits);
|
||
err = gpg_error (GPG_ERR_BAD_SECKEY);
|
||
goto leave;
|
||
}
|
||
nbits = rsa_q? count_bits (rsa_q, rsa_q_len) : 0;
|
||
if (nbits != maxbits)
|
||
{
|
||
log_error (_("RSA prime %s missing or not of size %d bits\n"),
|
||
"Q", (int)maxbits);
|
||
err = gpg_error (GPG_ERR_BAD_SECKEY);
|
||
goto leave;
|
||
}
|
||
|
||
/* We need to remove the cached public key. */
|
||
xfree (app->app_local->pk[keyno].key);
|
||
app->app_local->pk[keyno].key = NULL;
|
||
app->app_local->pk[keyno].keylen = 0;
|
||
app->app_local->pk[keyno].read_done = 0;
|
||
|
||
|
||
if (app->app_local->extcap.is_v2)
|
||
{
|
||
unsigned char *rsa_u, *rsa_dp, *rsa_dq;
|
||
size_t rsa_u_len, rsa_dp_len, rsa_dq_len;
|
||
gcry_mpi_t mpi_e, mpi_p, mpi_q;
|
||
gcry_mpi_t mpi_u = gcry_mpi_snew (0);
|
||
gcry_mpi_t mpi_dp = gcry_mpi_snew (0);
|
||
gcry_mpi_t mpi_dq = gcry_mpi_snew (0);
|
||
gcry_mpi_t mpi_tmp = gcry_mpi_snew (0);
|
||
int exmode;
|
||
|
||
/* Calculate the u, dp and dq components needed by RSA_CRT cards */
|
||
gcry_mpi_scan (&mpi_e, GCRYMPI_FMT_USG, rsa_e, rsa_e_len, NULL);
|
||
gcry_mpi_scan (&mpi_p, GCRYMPI_FMT_USG, rsa_p, rsa_p_len, NULL);
|
||
gcry_mpi_scan (&mpi_q, GCRYMPI_FMT_USG, rsa_q, rsa_q_len, NULL);
|
||
|
||
gcry_mpi_invm (mpi_u, mpi_q, mpi_p);
|
||
gcry_mpi_sub_ui (mpi_tmp, mpi_p, 1);
|
||
gcry_mpi_invm (mpi_dp, mpi_e, mpi_tmp);
|
||
gcry_mpi_sub_ui (mpi_tmp, mpi_q, 1);
|
||
gcry_mpi_invm (mpi_dq, mpi_e, mpi_tmp);
|
||
|
||
gcry_mpi_aprint (GCRYMPI_FMT_USG, &rsa_u, &rsa_u_len, mpi_u);
|
||
gcry_mpi_aprint (GCRYMPI_FMT_USG, &rsa_dp, &rsa_dp_len, mpi_dp);
|
||
gcry_mpi_aprint (GCRYMPI_FMT_USG, &rsa_dq, &rsa_dq_len, mpi_dq);
|
||
|
||
gcry_mpi_release (mpi_e);
|
||
gcry_mpi_release (mpi_p);
|
||
gcry_mpi_release (mpi_q);
|
||
gcry_mpi_release (mpi_u);
|
||
gcry_mpi_release (mpi_dp);
|
||
gcry_mpi_release (mpi_dq);
|
||
gcry_mpi_release (mpi_tmp);
|
||
|
||
/* Build the private key template as described in section 4.3.3.7 of
|
||
the OpenPGP card specs version 2.0. */
|
||
err = build_privkey_template (app, keyno,
|
||
rsa_n, rsa_n_len,
|
||
rsa_e, rsa_e_len,
|
||
rsa_p, rsa_p_len,
|
||
rsa_q, rsa_q_len,
|
||
rsa_u, rsa_u_len,
|
||
rsa_dp, rsa_dp_len,
|
||
rsa_dq, rsa_dq_len,
|
||
&template, &template_len);
|
||
xfree(rsa_u);
|
||
xfree(rsa_dp);
|
||
xfree(rsa_dq);
|
||
|
||
if (err)
|
||
goto leave;
|
||
|
||
/* Prepare for storing the key. */
|
||
err = verify_chv3 (app, pincb, pincb_arg);
|
||
if (err)
|
||
goto leave;
|
||
|
||
/* Store the key. */
|
||
if (app->app_local->cardcap.ext_lc_le && template_len > 254)
|
||
exmode = 1; /* Use extended length w/o a limit. */
|
||
else if (app->app_local->cardcap.cmd_chaining && template_len > 254)
|
||
exmode = -254;
|
||
else
|
||
exmode = 0;
|
||
err = iso7816_put_data_odd (app->slot, exmode, 0x3fff,
|
||
template, template_len);
|
||
}
|
||
else
|
||
{
|
||
/* Build the private key template as described in section 4.3.3.6 of
|
||
the OpenPGP card specs version 1.1:
|
||
0xC0 <length> public exponent
|
||
0xC1 <length> prime p
|
||
0xC2 <length> prime q
|
||
*/
|
||
assert (rsa_e_len <= 4);
|
||
template_len = (1 + 1 + 4
|
||
+ 1 + 1 + rsa_p_len
|
||
+ 1 + 1 + rsa_q_len);
|
||
template = tp = xtrymalloc_secure (template_len);
|
||
if (!template)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
*tp++ = 0xC0;
|
||
*tp++ = 4;
|
||
memcpy (tp, rsa_e, rsa_e_len);
|
||
if (rsa_e_len < 4)
|
||
{
|
||
/* Right justify E. */
|
||
memmove (tp+4-rsa_e_len, tp, rsa_e_len);
|
||
memset (tp, 0, 4-rsa_e_len);
|
||
}
|
||
tp += 4;
|
||
|
||
*tp++ = 0xC1;
|
||
*tp++ = rsa_p_len;
|
||
memcpy (tp, rsa_p, rsa_p_len);
|
||
tp += rsa_p_len;
|
||
|
||
*tp++ = 0xC2;
|
||
*tp++ = rsa_q_len;
|
||
memcpy (tp, rsa_q, rsa_q_len);
|
||
tp += rsa_q_len;
|
||
|
||
assert (tp - template == template_len);
|
||
|
||
/* Prepare for storing the key. */
|
||
err = verify_chv3 (app, pincb, pincb_arg);
|
||
if (err)
|
||
goto leave;
|
||
|
||
/* Store the key. */
|
||
err = iso7816_put_data (app->slot, 0,
|
||
(app->card_version > 0x0007? 0xE0:0xE9)+keyno,
|
||
template, template_len);
|
||
}
|
||
if (err)
|
||
{
|
||
log_error (_("failed to store the key: %s\n"), gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
err = store_fpr (app, keyno, created_at, fprbuf, PUBKEY_ALGO_RSA,
|
||
rsa_n, rsa_n_len, rsa_e, rsa_e_len);
|
||
if (err)
|
||
goto leave;
|
||
|
||
|
||
leave:
|
||
xfree (template);
|
||
return err;
|
||
}
|
||
|
||
|
||
static gpg_error_t
|
||
ecc_writekey (app_t app, gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg, int keyno,
|
||
const unsigned char *buf, size_t buflen, int depth)
|
||
{
|
||
gpg_error_t err;
|
||
const unsigned char *tok;
|
||
size_t toklen;
|
||
int last_depth1, last_depth2;
|
||
const unsigned char *ecc_q = NULL;
|
||
const unsigned char *ecc_d = NULL;
|
||
size_t ecc_q_len, ecc_d_len;
|
||
u32 created_at = 0;
|
||
const char *oidstr = NULL;
|
||
int flag_djb_tweak = 0;
|
||
int algo;
|
||
|
||
/* (private-key(ecc(curve%s)(q%m)(d%m))(created-at%d)):
|
||
curve = "NIST P-256" */
|
||
/* (private-key(ecc(curve%s)(q%m)(d%m))(created-at%d)):
|
||
curve = "secp256k1" */
|
||
/* (private-key(ecc(curve%s)(flags eddsa)(q%m)(d%m))(created-at%d)):
|
||
curve = "Ed25519" */
|
||
last_depth1 = depth;
|
||
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
|
||
&& depth && depth >= last_depth1)
|
||
{
|
||
if (tok)
|
||
{
|
||
err = gpg_error (GPG_ERR_UNKNOWN_SEXP);
|
||
goto leave;
|
||
}
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
|
||
if (tok && toklen == 5 && !memcmp (tok, "curve", 5))
|
||
{
|
||
unsigned char *curve;
|
||
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
|
||
curve = xtrymalloc (toklen+1);
|
||
if (!curve)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
memcpy (curve, tok, toklen);
|
||
curve[toklen] = 0;
|
||
oidstr = openpgp_curve_to_oid (curve, NULL);
|
||
xfree (curve);
|
||
}
|
||
else if (tok && toklen == 5 && !memcmp (tok, "flags", 5))
|
||
{
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
|
||
if (tok)
|
||
{
|
||
if ((toklen == 5 && !memcmp (tok, "eddsa", 5))
|
||
|| (toklen == 9 && !memcmp (tok, "djb-tweak", 9)))
|
||
flag_djb_tweak = 1;
|
||
}
|
||
}
|
||
else if (tok && toklen == 1)
|
||
{
|
||
const unsigned char **buf2;
|
||
size_t *buf2len;
|
||
|
||
switch (*tok)
|
||
{
|
||
case 'q': buf2 = &ecc_q; buf2len = &ecc_q_len; break;
|
||
case 'd': buf2 = &ecc_d; buf2len = &ecc_d_len; break;
|
||
default: buf2 = NULL; buf2len = NULL; break;
|
||
}
|
||
if (buf2 && *buf2)
|
||
{
|
||
err = gpg_error (GPG_ERR_DUP_VALUE);
|
||
goto leave;
|
||
}
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if (tok && buf2 && !flag_djb_tweak)
|
||
/* It's MPI. Strip off leading zero bytes and save. */
|
||
for (;toklen && !*tok; toklen--, tok++)
|
||
;
|
||
|
||
*buf2 = tok;
|
||
*buf2len = toklen;
|
||
}
|
||
/* Skip until end of list. */
|
||
last_depth2 = depth;
|
||
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
|
||
&& depth && depth >= last_depth2)
|
||
;
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
/* Parse other attributes. */
|
||
last_depth1 = depth;
|
||
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
|
||
&& depth && depth >= last_depth1)
|
||
{
|
||
if (tok)
|
||
{
|
||
err = gpg_error (GPG_ERR_UNKNOWN_SEXP);
|
||
goto leave;
|
||
}
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if (tok && toklen == 10 && !memcmp ("created-at", tok, toklen))
|
||
{
|
||
if ((err = parse_sexp (&buf,&buflen,&depth,&tok,&toklen)))
|
||
goto leave;
|
||
if (tok)
|
||
{
|
||
for (created_at=0; toklen && *tok && *tok >= '0' && *tok <= '9';
|
||
tok++, toklen--)
|
||
created_at = created_at*10 + (*tok - '0');
|
||
}
|
||
}
|
||
/* Skip until end of list. */
|
||
last_depth2 = depth;
|
||
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
|
||
&& depth && depth >= last_depth2)
|
||
;
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
|
||
|
||
/* Check that we have all parameters and that they match the card
|
||
description. */
|
||
if (!oidstr)
|
||
{
|
||
log_error (_("unsupported curve\n"));
|
||
err = gpg_error (GPG_ERR_INV_VALUE);
|
||
goto leave;
|
||
}
|
||
if (!created_at)
|
||
{
|
||
log_error (_("creation timestamp missing\n"));
|
||
err = gpg_error (GPG_ERR_INV_VALUE);
|
||
goto leave;
|
||
}
|
||
if (flag_djb_tweak && keyno != 1)
|
||
algo = PUBKEY_ALGO_EDDSA;
|
||
else if (keyno == 1)
|
||
algo = PUBKEY_ALGO_ECDH;
|
||
else
|
||
algo = PUBKEY_ALGO_ECDSA;
|
||
|
||
if (app->app_local->keyattr[keyno].key_type != KEY_TYPE_ECC
|
||
|| app->app_local->keyattr[keyno].ecc.oid != oidstr
|
||
|| app->app_local->keyattr[keyno].ecc.flags != flag_djb_tweak)
|
||
{
|
||
log_error ("key attribute on card doesn't match\n");
|
||
err = gpg_error (GPG_ERR_INV_VALUE);
|
||
goto leave;
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info ("ECC private key size is %u bytes\n", (unsigned int)ecc_d_len);
|
||
|
||
/* We need to remove the cached public key. */
|
||
xfree (app->app_local->pk[keyno].key);
|
||
app->app_local->pk[keyno].key = NULL;
|
||
app->app_local->pk[keyno].keylen = 0;
|
||
app->app_local->pk[keyno].read_done = 0;
|
||
|
||
if (app->app_local->extcap.is_v2)
|
||
{
|
||
/* Build the private key template as described in section 4.3.3.7 of
|
||
the OpenPGP card specs version 2.0. */
|
||
unsigned char *template;
|
||
size_t template_len;
|
||
int exmode;
|
||
|
||
err = build_ecc_privkey_template (app, keyno,
|
||
ecc_d, ecc_d_len,
|
||
&template, &template_len);
|
||
if (err)
|
||
goto leave;
|
||
|
||
/* Prepare for storing the key. */
|
||
err = verify_chv3 (app, pincb, pincb_arg);
|
||
if (err)
|
||
{
|
||
xfree (template);
|
||
goto leave;
|
||
}
|
||
|
||
/* Store the key. */
|
||
if (app->app_local->cardcap.ext_lc_le && template_len > 254)
|
||
exmode = 1; /* Use extended length w/o a limit. */
|
||
else if (app->app_local->cardcap.cmd_chaining && template_len > 254)
|
||
exmode = -254;
|
||
else
|
||
exmode = 0;
|
||
err = iso7816_put_data_odd (app->slot, exmode, 0x3fff,
|
||
template, template_len);
|
||
xfree (template);
|
||
}
|
||
else
|
||
err = gpg_error (GPG_ERR_NOT_SUPPORTED);
|
||
|
||
if (err)
|
||
{
|
||
log_error (_("failed to store the key: %s\n"), gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
else
|
||
{
|
||
gcry_mpi_t oid;
|
||
const unsigned char *oidbuf;
|
||
unsigned int n;
|
||
size_t oid_len;
|
||
unsigned char fprbuf[20];
|
||
|
||
err = openpgp_oid_from_str (oidstr, &oid);
|
||
if (err)
|
||
goto leave;
|
||
|
||
oidbuf = gcry_mpi_get_opaque (oid, &n);
|
||
oid_len = (n+7)/8;
|
||
if (!oidbuf)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
gcry_mpi_release (oid);
|
||
goto leave;
|
||
}
|
||
err = store_fpr (app, keyno, created_at, fprbuf, algo,
|
||
oidbuf, oid_len, ecc_q, ecc_q_len,
|
||
"\x03\x01\x08\x07", (size_t)4);
|
||
gcry_mpi_release (oid);
|
||
}
|
||
|
||
leave:
|
||
return err;
|
||
}
|
||
|
||
/* Handle the WRITEKEY command for OpenPGP. This function expects a
|
||
canonical encoded S-expression with the secret key in KEYDATA and
|
||
its length (for assertions) in KEYDATALEN. KEYID needs to be the
|
||
usual keyid which for OpenPGP is the string "OPENPGP.n" with
|
||
n=1,2,3. Bit 0 of FLAGS indicates whether an existing key shall
|
||
get overwritten. PINCB and PINCB_ARG are the usual arguments for
|
||
the pinentry callback. */
|
||
static gpg_error_t
|
||
do_writekey (app_t app, ctrl_t ctrl,
|
||
const char *keyid, unsigned int flags,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg,
|
||
const unsigned char *keydata, size_t keydatalen)
|
||
{
|
||
gpg_error_t err;
|
||
int force = (flags & 1);
|
||
int keyno;
|
||
const unsigned char *buf, *tok;
|
||
size_t buflen, toklen;
|
||
int depth;
|
||
|
||
(void)ctrl;
|
||
|
||
if (!strcmp (keyid, "OPENPGP.1"))
|
||
keyno = 0;
|
||
else if (!strcmp (keyid, "OPENPGP.2"))
|
||
keyno = 1;
|
||
else if (!strcmp (keyid, "OPENPGP.3"))
|
||
keyno = 2;
|
||
else
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
|
||
err = does_key_exist (app, keyno, 0, force);
|
||
if (err)
|
||
return err;
|
||
|
||
|
||
/*
|
||
Parse the S-expression
|
||
*/
|
||
buf = keydata;
|
||
buflen = keydatalen;
|
||
depth = 0;
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if (!tok || toklen != 11 || memcmp ("private-key", tok, toklen))
|
||
{
|
||
if (!tok)
|
||
;
|
||
else if (toklen == 21 && !memcmp ("protected-private-key", tok, toklen))
|
||
log_info ("protected-private-key passed to writekey\n");
|
||
else if (toklen == 20 && !memcmp ("shadowed-private-key", tok, toklen))
|
||
log_info ("shadowed-private-key passed to writekey\n");
|
||
err = gpg_error (GPG_ERR_BAD_SECKEY);
|
||
goto leave;
|
||
}
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
|
||
goto leave;
|
||
if (tok && toklen == 3 && memcmp ("rsa", tok, toklen) == 0)
|
||
err = rsa_writekey (app, pincb, pincb_arg, keyno, buf, buflen, depth);
|
||
else if (tok && toklen == 3 && memcmp ("ecc", tok, toklen) == 0)
|
||
err = ecc_writekey (app, pincb, pincb_arg, keyno, buf, buflen, depth);
|
||
else
|
||
{
|
||
err = gpg_error (GPG_ERR_WRONG_PUBKEY_ALGO);
|
||
goto leave;
|
||
}
|
||
|
||
leave:
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
/* Handle the GENKEY command. */
|
||
static gpg_error_t
|
||
do_genkey (app_t app, ctrl_t ctrl, const char *keynostr, unsigned int flags,
|
||
time_t createtime,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg)
|
||
{
|
||
int rc;
|
||
char numbuf[30];
|
||
unsigned char fprbuf[20];
|
||
const unsigned char *keydata, *m, *e;
|
||
unsigned char *buffer = NULL;
|
||
size_t buflen, keydatalen, mlen, elen;
|
||
time_t created_at;
|
||
int keyno = atoi (keynostr);
|
||
int force = (flags & 1);
|
||
time_t start_at;
|
||
int exmode;
|
||
int le_value;
|
||
unsigned int keybits;
|
||
|
||
if (keyno < 1 || keyno > 3)
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
keyno--;
|
||
|
||
/* We flush the cache to increase the traffic before a key
|
||
generation. This _might_ help a card to gather more entropy. */
|
||
flush_cache (app);
|
||
|
||
/* Obviously we need to remove the cached public key. */
|
||
xfree (app->app_local->pk[keyno].key);
|
||
app->app_local->pk[keyno].key = NULL;
|
||
app->app_local->pk[keyno].keylen = 0;
|
||
app->app_local->pk[keyno].read_done = 0;
|
||
|
||
/* Check whether a key already exists. */
|
||
rc = does_key_exist (app, keyno, 1, force);
|
||
if (rc)
|
||
return rc;
|
||
|
||
/* Because we send the key parameter back via status lines we need
|
||
to put a limit on the max. allowed keysize. 2048 bit will
|
||
already lead to a 527 byte long status line and thus a 4096 bit
|
||
key would exceed the Assuan line length limit. */
|
||
keybits = app->app_local->keyattr[keyno].rsa.n_bits;
|
||
if (keybits > 4096)
|
||
return gpg_error (GPG_ERR_TOO_LARGE);
|
||
|
||
/* Prepare for key generation by verifying the Admin PIN. */
|
||
rc = verify_chv3 (app, pincb, pincb_arg);
|
||
if (rc)
|
||
goto leave;
|
||
|
||
/* Test whether we will need extended length mode. (1900 is an
|
||
arbitrary length which for sure fits into a short apdu.) */
|
||
if (app->app_local->cardcap.ext_lc_le && keybits > 1900)
|
||
{
|
||
exmode = 1; /* Use extended length w/o a limit. */
|
||
le_value = app->app_local->extcap.max_rsp_data;
|
||
/* No need to check le_value because it comes from a 16 bit
|
||
value and thus can't create an overflow on a 32 bit
|
||
system. */
|
||
}
|
||
else
|
||
{
|
||
exmode = 0;
|
||
le_value = 256; /* Use legacy value. */
|
||
}
|
||
|
||
log_info (_("please wait while key is being generated ...\n"));
|
||
start_at = time (NULL);
|
||
rc = iso7816_generate_keypair
|
||
/* # warning key generation temporary replaced by reading an existing key. */
|
||
/* rc = iso7816_read_public_key */
|
||
(app->slot, exmode,
|
||
(const unsigned char*)(keyno == 0? "\xB6" :
|
||
keyno == 1? "\xB8" : "\xA4"), 2,
|
||
le_value,
|
||
&buffer, &buflen);
|
||
if (rc)
|
||
{
|
||
rc = gpg_error (GPG_ERR_CARD);
|
||
log_error (_("generating key failed\n"));
|
||
goto leave;
|
||
}
|
||
log_info (_("key generation completed (%d seconds)\n"),
|
||
(int)(time (NULL) - start_at));
|
||
|
||
keydata = find_tlv (buffer, buflen, 0x7F49, &keydatalen);
|
||
if (!keydata)
|
||
{
|
||
rc = gpg_error (GPG_ERR_CARD);
|
||
log_error (_("response does not contain the public key data\n"));
|
||
goto leave;
|
||
}
|
||
|
||
m = find_tlv (keydata, keydatalen, 0x0081, &mlen);
|
||
if (!m)
|
||
{
|
||
rc = gpg_error (GPG_ERR_CARD);
|
||
log_error (_("response does not contain the RSA modulus\n"));
|
||
goto leave;
|
||
}
|
||
/* log_printhex ("RSA n:", m, mlen); */
|
||
send_key_data (ctrl, "n", m, mlen);
|
||
|
||
e = find_tlv (keydata, keydatalen, 0x0082, &elen);
|
||
if (!e)
|
||
{
|
||
rc = gpg_error (GPG_ERR_CARD);
|
||
log_error (_("response does not contain the RSA public exponent\n"));
|
||
goto leave;
|
||
}
|
||
/* log_printhex ("RSA e:", e, elen); */
|
||
send_key_data (ctrl, "e", e, elen);
|
||
|
||
created_at = createtime? createtime : gnupg_get_time ();
|
||
sprintf (numbuf, "%lu", (unsigned long)created_at);
|
||
send_status_info (ctrl, "KEY-CREATED-AT",
|
||
numbuf, (size_t)strlen(numbuf), NULL, 0);
|
||
|
||
rc = store_fpr (app, keyno, (u32)created_at, fprbuf, PUBKEY_ALGO_RSA,
|
||
m, mlen, e, elen);
|
||
if (rc)
|
||
goto leave;
|
||
send_fpr_if_not_null (ctrl, "KEY-FPR", -1, fprbuf);
|
||
|
||
|
||
leave:
|
||
xfree (buffer);
|
||
return rc;
|
||
}
|
||
|
||
|
||
static unsigned long
|
||
convert_sig_counter_value (const unsigned char *value, size_t valuelen)
|
||
{
|
||
unsigned long ul;
|
||
|
||
if (valuelen == 3 )
|
||
ul = (value[0] << 16) | (value[1] << 8) | value[2];
|
||
else
|
||
{
|
||
log_error (_("invalid structure of OpenPGP card (DO 0x93)\n"));
|
||
ul = 0;
|
||
}
|
||
return ul;
|
||
}
|
||
|
||
static unsigned long
|
||
get_sig_counter (app_t app)
|
||
{
|
||
void *relptr;
|
||
unsigned char *value;
|
||
size_t valuelen;
|
||
unsigned long ul;
|
||
|
||
relptr = get_one_do (app, 0x0093, &value, &valuelen, NULL);
|
||
if (!relptr)
|
||
return 0;
|
||
ul = convert_sig_counter_value (value, valuelen);
|
||
xfree (relptr);
|
||
return ul;
|
||
}
|
||
|
||
static gpg_error_t
|
||
compare_fingerprint (app_t app, int keyno, unsigned char *sha1fpr)
|
||
{
|
||
const unsigned char *fpr;
|
||
unsigned char *buffer;
|
||
size_t buflen, n;
|
||
int rc, i;
|
||
|
||
assert (keyno >= 1 && keyno <= 3);
|
||
|
||
rc = get_cached_data (app, 0x006E, &buffer, &buflen, 0, 0);
|
||
if (rc)
|
||
{
|
||
log_error (_("error reading application data\n"));
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
fpr = find_tlv (buffer, buflen, 0x00C5, &n);
|
||
if (!fpr || n != 60)
|
||
{
|
||
xfree (buffer);
|
||
log_error (_("error reading fingerprint DO\n"));
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
fpr += (keyno-1)*20;
|
||
for (i=0; i < 20; i++)
|
||
if (sha1fpr[i] != fpr[i])
|
||
{
|
||
xfree (buffer);
|
||
log_info (_("fingerprint on card does not match requested one\n"));
|
||
return gpg_error (GPG_ERR_WRONG_SECKEY);
|
||
}
|
||
xfree (buffer);
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* If a fingerprint has been specified check it against the one on the
|
||
card. This allows for a meaningful error message in case the key
|
||
on the card has been replaced but the shadow information known to
|
||
gpg has not been updated. If there is no fingerprint we assume
|
||
that this is okay. */
|
||
static gpg_error_t
|
||
check_against_given_fingerprint (app_t app, const char *fpr, int keyno)
|
||
{
|
||
unsigned char tmp[20];
|
||
const char *s;
|
||
int n;
|
||
|
||
for (s=fpr, n=0; hexdigitp (s); s++, n++)
|
||
;
|
||
if (n != 40)
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
else if (!*s)
|
||
; /* okay */
|
||
else
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
|
||
for (s=fpr, n=0; n < 20; s += 2, n++)
|
||
tmp[n] = xtoi_2 (s);
|
||
return compare_fingerprint (app, keyno, tmp);
|
||
}
|
||
|
||
|
||
|
||
/* Compute a digital signature on INDATA which is expected to be the
|
||
raw message digest. For this application the KEYIDSTR consists of
|
||
the serialnumber and the fingerprint delimited by a slash.
|
||
|
||
Note that this function may return the error code
|
||
GPG_ERR_WRONG_CARD to indicate that the card currently present does
|
||
not match the one required for the requested action (e.g. the
|
||
serial number does not match).
|
||
|
||
As a special feature a KEYIDSTR of "OPENPGP.3" redirects the
|
||
operation to the auth command.
|
||
*/
|
||
static gpg_error_t
|
||
do_sign (app_t app, const char *keyidstr, int hashalgo,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg,
|
||
const void *indata, size_t indatalen,
|
||
unsigned char **outdata, size_t *outdatalen )
|
||
{
|
||
static unsigned char rmd160_prefix[15] = /* Object ID is 1.3.36.3.2.1 */
|
||
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x24, 0x03,
|
||
0x02, 0x01, 0x05, 0x00, 0x04, 0x14 };
|
||
static unsigned char sha1_prefix[15] = /* (1.3.14.3.2.26) */
|
||
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03,
|
||
0x02, 0x1a, 0x05, 0x00, 0x04, 0x14 };
|
||
static unsigned char sha224_prefix[19] = /* (2.16.840.1.101.3.4.2.4) */
|
||
{ 0x30, 0x2D, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48,
|
||
0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 0x05, 0x00, 0x04,
|
||
0x1C };
|
||
static unsigned char sha256_prefix[19] = /* (2.16.840.1.101.3.4.2.1) */
|
||
{ 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
|
||
0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05,
|
||
0x00, 0x04, 0x20 };
|
||
static unsigned char sha384_prefix[19] = /* (2.16.840.1.101.3.4.2.2) */
|
||
{ 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
|
||
0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05,
|
||
0x00, 0x04, 0x30 };
|
||
static unsigned char sha512_prefix[19] = /* (2.16.840.1.101.3.4.2.3) */
|
||
{ 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
|
||
0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05,
|
||
0x00, 0x04, 0x40 };
|
||
int rc;
|
||
unsigned char data[19+64];
|
||
size_t datalen;
|
||
unsigned char tmp_sn[20]; /* Actually 16 bytes but also for the fpr. */
|
||
const char *s;
|
||
int n;
|
||
const char *fpr = NULL;
|
||
unsigned long sigcount;
|
||
int use_auth = 0;
|
||
int exmode, le_value;
|
||
|
||
if (!keyidstr || !*keyidstr)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
/* Strip off known prefixes. */
|
||
#define X(a,b,c,d) \
|
||
if (hashalgo == GCRY_MD_ ## a \
|
||
&& (d) \
|
||
&& indatalen == sizeof b ## _prefix + (c) \
|
||
&& !memcmp (indata, b ## _prefix, sizeof b ## _prefix)) \
|
||
{ \
|
||
indata = (const char*)indata + sizeof b ## _prefix; \
|
||
indatalen -= sizeof b ## _prefix; \
|
||
}
|
||
|
||
if (indatalen == 20)
|
||
; /* Assume a plain SHA-1 or RMD160 digest has been given. */
|
||
else X(SHA1, sha1, 20, 1)
|
||
else X(RMD160, rmd160, 20, 1)
|
||
else X(SHA224, sha224, 28, app->app_local->extcap.is_v2)
|
||
else X(SHA256, sha256, 32, app->app_local->extcap.is_v2)
|
||
else X(SHA384, sha384, 48, app->app_local->extcap.is_v2)
|
||
else X(SHA512, sha512, 64, app->app_local->extcap.is_v2)
|
||
else if ((indatalen == 28 || indatalen == 32
|
||
|| indatalen == 48 || indatalen ==64)
|
||
&& app->app_local->extcap.is_v2)
|
||
; /* Assume a plain SHA-3 digest has been given. */
|
||
else
|
||
{
|
||
log_error (_("card does not support digest algorithm %s\n"),
|
||
gcry_md_algo_name (hashalgo));
|
||
/* Or the supplied digest length does not match an algorithm. */
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
}
|
||
#undef X
|
||
|
||
/* Check whether an OpenPGP card of any version has been requested. */
|
||
if (!strcmp (keyidstr, "OPENPGP.1"))
|
||
;
|
||
else if (!strcmp (keyidstr, "OPENPGP.3"))
|
||
use_auth = 1;
|
||
else if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
else
|
||
{
|
||
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
|
||
;
|
||
if (n != 32)
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
else if (!*s)
|
||
; /* no fingerprint given: we allow this for now. */
|
||
else if (*s == '/')
|
||
fpr = s + 1;
|
||
else
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
|
||
for (s=keyidstr, n=0; n < 16; s += 2, n++)
|
||
tmp_sn[n] = xtoi_2 (s);
|
||
|
||
if (app->serialnolen != 16)
|
||
return gpg_error (GPG_ERR_INV_CARD);
|
||
if (memcmp (app->serialno, tmp_sn, 16))
|
||
return gpg_error (GPG_ERR_WRONG_CARD);
|
||
}
|
||
|
||
/* If a fingerprint has been specified check it against the one on
|
||
the card. This is allows for a meaningful error message in case
|
||
the key on the card has been replaced but the shadow information
|
||
known to gpg was not updated. If there is no fingerprint, gpg
|
||
will detect a bogus signature anyway due to the
|
||
verify-after-signing feature. */
|
||
rc = fpr? check_against_given_fingerprint (app, fpr, 1) : 0;
|
||
if (rc)
|
||
return rc;
|
||
|
||
/* Concatenate prefix and digest. */
|
||
#define X(a,b,d) \
|
||
if (hashalgo == GCRY_MD_ ## a && (d) ) \
|
||
{ \
|
||
datalen = sizeof b ## _prefix + indatalen; \
|
||
assert (datalen <= sizeof data); \
|
||
memcpy (data, b ## _prefix, sizeof b ## _prefix); \
|
||
memcpy (data + sizeof b ## _prefix, indata, indatalen); \
|
||
}
|
||
|
||
if (use_auth
|
||
|| app->app_local->keyattr[use_auth? 2: 0].key_type == KEY_TYPE_RSA)
|
||
{
|
||
X(SHA1, sha1, 1)
|
||
else X(RMD160, rmd160, 1)
|
||
else X(SHA224, sha224, app->app_local->extcap.is_v2)
|
||
else X(SHA256, sha256, app->app_local->extcap.is_v2)
|
||
else X(SHA384, sha384, app->app_local->extcap.is_v2)
|
||
else X(SHA512, sha512, app->app_local->extcap.is_v2)
|
||
else
|
||
return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
|
||
}
|
||
else
|
||
{
|
||
datalen = indatalen;
|
||
memcpy (data, indata, indatalen);
|
||
}
|
||
#undef X
|
||
|
||
/* Redirect to the AUTH command if asked to. */
|
||
if (use_auth)
|
||
{
|
||
return do_auth (app, "OPENPGP.3", pincb, pincb_arg,
|
||
data, datalen,
|
||
outdata, outdatalen);
|
||
}
|
||
|
||
/* Show the number of signature done using this key. */
|
||
sigcount = get_sig_counter (app);
|
||
log_info (_("signatures created so far: %lu\n"), sigcount);
|
||
|
||
/* Check CHV if needed. */
|
||
if (!app->did_chv1 || app->force_chv1 )
|
||
{
|
||
char *pinvalue;
|
||
|
||
rc = verify_a_chv (app, pincb, pincb_arg, 1, sigcount, &pinvalue);
|
||
if (rc)
|
||
return rc;
|
||
|
||
app->did_chv1 = 1;
|
||
|
||
/* For cards with versions < 2 we want to keep CHV1 and CHV2 in
|
||
sync, thus we verify CHV2 here using the given PIN. Cards
|
||
with version2 to not have the need for a separate CHV2 and
|
||
internally use just one. Obviously we can't do that if the
|
||
pinpad has been used. */
|
||
if (!app->did_chv2 && pinvalue && !app->app_local->extcap.is_v2)
|
||
{
|
||
rc = iso7816_verify (app->slot, 0x82, pinvalue, strlen (pinvalue));
|
||
if (gpg_err_code (rc) == GPG_ERR_BAD_PIN)
|
||
rc = gpg_error (GPG_ERR_PIN_NOT_SYNCED);
|
||
if (rc)
|
||
{
|
||
log_error (_("verify CHV%d failed: %s\n"), 2, gpg_strerror (rc));
|
||
xfree (pinvalue);
|
||
flush_cache_after_error (app);
|
||
return rc;
|
||
}
|
||
app->did_chv2 = 1;
|
||
}
|
||
xfree (pinvalue);
|
||
}
|
||
|
||
|
||
if (app->app_local->cardcap.ext_lc_le)
|
||
{
|
||
exmode = 1; /* Use extended length. */
|
||
le_value = app->app_local->extcap.max_rsp_data;
|
||
}
|
||
else
|
||
{
|
||
exmode = 0;
|
||
le_value = 0;
|
||
}
|
||
rc = iso7816_compute_ds (app->slot, exmode, data, datalen, le_value,
|
||
outdata, outdatalen);
|
||
return rc;
|
||
}
|
||
|
||
/* Compute a digital signature using the INTERNAL AUTHENTICATE command
|
||
on INDATA which is expected to be the raw message digest. For this
|
||
application the KEYIDSTR consists of the serialnumber and the
|
||
fingerprint delimited by a slash. Optionally the id OPENPGP.3 may
|
||
be given.
|
||
|
||
Note that this function may return the error code
|
||
GPG_ERR_WRONG_CARD to indicate that the card currently present does
|
||
not match the one required for the requested action (e.g. the
|
||
serial number does not match). */
|
||
static gpg_error_t
|
||
do_auth (app_t app, const char *keyidstr,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg,
|
||
const void *indata, size_t indatalen,
|
||
unsigned char **outdata, size_t *outdatalen )
|
||
{
|
||
int rc;
|
||
unsigned char tmp_sn[20]; /* Actually 16 but we use it also for the fpr. */
|
||
const char *s;
|
||
int n;
|
||
const char *fpr = NULL;
|
||
|
||
if (!keyidstr || !*keyidstr)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
if (app->app_local->keyattr[2].key_type == KEY_TYPE_RSA
|
||
&& indatalen > 101) /* For a 2048 bit key. */
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
if (app->app_local->keyattr[2].key_type == KEY_TYPE_ECC)
|
||
{
|
||
if (!app->app_local->keyattr[2].ecc.flags
|
||
&& (indatalen == 51 || indatalen == 67 || indatalen == 83))
|
||
{
|
||
const char *p = (const char *)indata + 19;
|
||
indata = p;
|
||
indatalen -= 19;
|
||
}
|
||
else
|
||
{
|
||
const char *p = (const char *)indata + 15;
|
||
indata = p;
|
||
indatalen -= 15;
|
||
}
|
||
}
|
||
|
||
/* Check whether an OpenPGP card of any version has been requested. */
|
||
if (!strcmp (keyidstr, "OPENPGP.3"))
|
||
;
|
||
else if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
else
|
||
{
|
||
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
|
||
;
|
||
if (n != 32)
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
else if (!*s)
|
||
; /* no fingerprint given: we allow this for now. */
|
||
else if (*s == '/')
|
||
fpr = s + 1;
|
||
else
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
|
||
for (s=keyidstr, n=0; n < 16; s += 2, n++)
|
||
tmp_sn[n] = xtoi_2 (s);
|
||
|
||
if (app->serialnolen != 16)
|
||
return gpg_error (GPG_ERR_INV_CARD);
|
||
if (memcmp (app->serialno, tmp_sn, 16))
|
||
return gpg_error (GPG_ERR_WRONG_CARD);
|
||
}
|
||
|
||
/* If a fingerprint has been specified check it against the one on
|
||
the card. This is allows for a meaningful error message in case
|
||
the key on the card has been replaced but the shadow information
|
||
known to gpg was not updated. If there is no fingerprint, gpg
|
||
will detect a bogus signature anyway due to the
|
||
verify-after-signing feature. */
|
||
rc = fpr? check_against_given_fingerprint (app, fpr, 3) : 0;
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = verify_chv2 (app, pincb, pincb_arg);
|
||
if (!rc)
|
||
{
|
||
int exmode, le_value;
|
||
|
||
if (app->app_local->cardcap.ext_lc_le)
|
||
{
|
||
exmode = 1; /* Use extended length. */
|
||
le_value = app->app_local->extcap.max_rsp_data;
|
||
}
|
||
else
|
||
{
|
||
exmode = 0;
|
||
le_value = 0;
|
||
}
|
||
rc = iso7816_internal_authenticate (app->slot, exmode,
|
||
indata, indatalen, le_value,
|
||
outdata, outdatalen);
|
||
}
|
||
return rc;
|
||
}
|
||
|
||
|
||
static gpg_error_t
|
||
do_decipher (app_t app, const char *keyidstr,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg,
|
||
const void *indata, size_t indatalen,
|
||
unsigned char **outdata, size_t *outdatalen,
|
||
unsigned int *r_info)
|
||
{
|
||
int rc;
|
||
unsigned char tmp_sn[20]; /* actually 16 but we use it also for the fpr. */
|
||
const char *s;
|
||
int n;
|
||
const char *fpr = NULL;
|
||
int exmode, le_value;
|
||
unsigned char *fixbuf = NULL;
|
||
int padind = 0;
|
||
int fixuplen = 0;
|
||
|
||
if (!keyidstr || !*keyidstr || !indatalen)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
/* Check whether an OpenPGP card of any version has been requested. */
|
||
if (!strcmp (keyidstr, "OPENPGP.2"))
|
||
;
|
||
else if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
else
|
||
{
|
||
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
|
||
;
|
||
if (n != 32)
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
else if (!*s)
|
||
; /* no fingerprint given: we allow this for now. */
|
||
else if (*s == '/')
|
||
fpr = s + 1;
|
||
else
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
|
||
for (s=keyidstr, n=0; n < 16; s += 2, n++)
|
||
tmp_sn[n] = xtoi_2 (s);
|
||
|
||
if (app->serialnolen != 16)
|
||
return gpg_error (GPG_ERR_INV_CARD);
|
||
if (memcmp (app->serialno, tmp_sn, 16))
|
||
return gpg_error (GPG_ERR_WRONG_CARD);
|
||
}
|
||
|
||
/* If a fingerprint has been specified check it against the one on
|
||
the card. This is allows for a meaningful error message in case
|
||
the key on the card has been replaced but the shadow information
|
||
known to gpg was not updated. If there is no fingerprint, the
|
||
decryption won't produce the right plaintext anyway. */
|
||
rc = fpr? check_against_given_fingerprint (app, fpr, 2) : 0;
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = verify_chv2 (app, pincb, pincb_arg);
|
||
if (rc)
|
||
return rc;
|
||
|
||
if (indatalen == 16 + 1 || indatalen == 32 + 1)
|
||
/* PSO:DECIPHER with symmetric key. */
|
||
padind = -1;
|
||
else if (app->app_local->keyattr[1].key_type == KEY_TYPE_RSA)
|
||
{
|
||
/* We might encounter a couple of leading zeroes in the
|
||
cryptogram. Due to internal use of MPIs these leading zeroes
|
||
are stripped. However the OpenPGP card expects exactly 128
|
||
bytes for the cryptogram (for a 1k key). Thus we need to fix
|
||
it up. We do this for up to 16 leading zero bytes; a
|
||
cryptogram with more than this is with a very high
|
||
probability anyway broken. If a signed conversion was used
|
||
we may also encounter one leading zero followed by the correct
|
||
length. We fix that as well. */
|
||
if (indatalen >= (128-16) && indatalen < 128) /* 1024 bit key. */
|
||
fixuplen = 128 - indatalen;
|
||
else if (indatalen >= (192-16) && indatalen < 192) /* 1536 bit key. */
|
||
fixuplen = 192 - indatalen;
|
||
else if (indatalen >= (256-16) && indatalen < 256) /* 2048 bit key. */
|
||
fixuplen = 256 - indatalen;
|
||
else if (indatalen >= (384-16) && indatalen < 384) /* 3072 bit key. */
|
||
fixuplen = 384 - indatalen;
|
||
else if (indatalen >= (512-16) && indatalen < 512) /* 4096 bit key. */
|
||
fixuplen = 512 - indatalen;
|
||
else if (!*(const char *)indata && (indatalen == 129
|
||
|| indatalen == 193
|
||
|| indatalen == 257
|
||
|| indatalen == 385
|
||
|| indatalen == 513))
|
||
fixuplen = -1;
|
||
else
|
||
fixuplen = 0;
|
||
|
||
if (fixuplen > 0)
|
||
{
|
||
/* While we have to prepend stuff anyway, we can also
|
||
include the padding byte here so that iso1816_decipher
|
||
does not need to do another data mangling. */
|
||
fixuplen++;
|
||
|
||
fixbuf = xtrymalloc (fixuplen + indatalen);
|
||
if (!fixbuf)
|
||
return gpg_error_from_syserror ();
|
||
|
||
memset (fixbuf, 0, fixuplen);
|
||
memcpy (fixbuf+fixuplen, indata, indatalen);
|
||
indata = fixbuf;
|
||
indatalen = fixuplen + indatalen;
|
||
padind = -1; /* Already padded. */
|
||
}
|
||
else if (fixuplen < 0)
|
||
{
|
||
/* We use the extra leading zero as the padding byte. */
|
||
padind = -1;
|
||
}
|
||
}
|
||
else if (app->app_local->keyattr[1].key_type == KEY_TYPE_ECC)
|
||
{
|
||
fixuplen = 7;
|
||
fixbuf = xtrymalloc (fixuplen + indatalen);
|
||
if (!fixbuf)
|
||
return gpg_error_from_syserror ();
|
||
|
||
/* Build 'Cipher DO' */
|
||
fixbuf[0] = '\xa6';
|
||
fixbuf[1] = (char)(indatalen+5);
|
||
fixbuf[2] = '\x7f';
|
||
fixbuf[3] = '\x49';
|
||
fixbuf[4] = (char)(indatalen+2);
|
||
fixbuf[5] = '\x86';
|
||
fixbuf[6] = (char)indatalen;
|
||
memcpy (fixbuf+fixuplen, indata, indatalen);
|
||
indata = fixbuf;
|
||
indatalen = fixuplen + indatalen;
|
||
|
||
padind = -1;
|
||
}
|
||
else
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
if (app->app_local->cardcap.ext_lc_le && indatalen > 254 )
|
||
{
|
||
exmode = 1; /* Extended length w/o a limit. */
|
||
le_value = app->app_local->extcap.max_rsp_data;
|
||
}
|
||
else if (app->app_local->cardcap.cmd_chaining && indatalen > 254)
|
||
{
|
||
exmode = -254; /* Command chaining with max. 254 bytes. */
|
||
le_value = 0;
|
||
}
|
||
else
|
||
exmode = le_value = 0;
|
||
|
||
rc = iso7816_decipher (app->slot, exmode,
|
||
indata, indatalen, le_value, padind,
|
||
outdata, outdatalen);
|
||
xfree (fixbuf);
|
||
|
||
if (gpg_err_code (rc) == GPG_ERR_CARD /* actual SW is 0x640a */
|
||
&& app->app_local->manufacturer == 5
|
||
&& app->card_version == 0x0200)
|
||
log_info ("NOTE: Cards with manufacturer id 5 and s/n <= 346 (0x15a)"
|
||
" do not work with encryption keys > 2048 bits\n");
|
||
|
||
*r_info |= APP_DECIPHER_INFO_NOPAD;
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
/* Perform a simple verify operation for CHV1 and CHV2, so that
|
||
further operations won't ask for CHV2 and it is possible to do a
|
||
cheap check on the PIN: If there is something wrong with the PIN
|
||
entry system, only the regular CHV will get blocked and not the
|
||
dangerous CHV3. KEYIDSTR is the usual card's serial number; an
|
||
optional fingerprint part will be ignored.
|
||
|
||
There is a special mode if the keyidstr is "<serialno>[CHV3]" with
|
||
the "[CHV3]" being a literal string: The Admin Pin is checked if
|
||
and only if the retry counter is still at 3. */
|
||
static gpg_error_t
|
||
do_check_pin (app_t app, const char *keyidstr,
|
||
gpg_error_t (*pincb)(void*, const char *, char **),
|
||
void *pincb_arg)
|
||
{
|
||
unsigned char tmp_sn[20];
|
||
const char *s;
|
||
int n;
|
||
int admin_pin = 0;
|
||
|
||
if (!keyidstr || !*keyidstr)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
/* Check whether an OpenPGP card of any version has been requested. */
|
||
if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
|
||
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
|
||
;
|
||
if (n != 32)
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
else if (!*s)
|
||
; /* No fingerprint given: we allow this for now. */
|
||
else if (*s == '/')
|
||
; /* We ignore a fingerprint. */
|
||
else if (!strcmp (s, "[CHV3]") )
|
||
admin_pin = 1;
|
||
else
|
||
return gpg_error (GPG_ERR_INV_ID);
|
||
|
||
for (s=keyidstr, n=0; n < 16; s += 2, n++)
|
||
tmp_sn[n] = xtoi_2 (s);
|
||
|
||
if (app->serialnolen != 16)
|
||
return gpg_error (GPG_ERR_INV_CARD);
|
||
if (memcmp (app->serialno, tmp_sn, 16))
|
||
return gpg_error (GPG_ERR_WRONG_CARD);
|
||
|
||
/* Yes, there is a race conditions: The user might pull the card
|
||
right here and we won't notice that. However this is not a
|
||
problem and the check above is merely for a graceful failure
|
||
between operations. */
|
||
|
||
if (admin_pin)
|
||
{
|
||
void *relptr;
|
||
unsigned char *value;
|
||
size_t valuelen;
|
||
int count;
|
||
|
||
relptr = get_one_do (app, 0x00C4, &value, &valuelen, NULL);
|
||
if (!relptr || valuelen < 7)
|
||
{
|
||
log_error (_("error retrieving CHV status from card\n"));
|
||
xfree (relptr);
|
||
return gpg_error (GPG_ERR_CARD);
|
||
}
|
||
count = value[6];
|
||
xfree (relptr);
|
||
|
||
if (!count)
|
||
{
|
||
log_info (_("card is permanently locked!\n"));
|
||
return gpg_error (GPG_ERR_BAD_PIN);
|
||
}
|
||
else if (count < 3)
|
||
{
|
||
log_info (_("verification of Admin PIN is currently prohibited "
|
||
"through this command\n"));
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
|
||
app->did_chv3 = 0; /* Force verification. */
|
||
return verify_chv3 (app, pincb, pincb_arg);
|
||
}
|
||
else
|
||
return verify_chv2 (app, pincb, pincb_arg);
|
||
}
|
||
|
||
|
||
/* Show information about card capabilities. */
|
||
static void
|
||
show_caps (struct app_local_s *s)
|
||
{
|
||
log_info ("Version-2 ......: %s\n", s->extcap.is_v2? "yes":"no");
|
||
log_info ("Get-Challenge ..: %s", s->extcap.get_challenge? "yes":"no");
|
||
if (s->extcap.get_challenge)
|
||
log_printf (" (%u bytes max)", s->extcap.max_get_challenge);
|
||
log_info ("Key-Import .....: %s\n", s->extcap.key_import? "yes":"no");
|
||
log_info ("Change-Force-PW1: %s\n", s->extcap.change_force_chv? "yes":"no");
|
||
log_info ("Private-DOs ....: %s\n", s->extcap.private_dos? "yes":"no");
|
||
log_info ("Algo-Attr-Change: %s\n", s->extcap.algo_attr_change? "yes":"no");
|
||
log_info ("SM-Support .....: %s", s->extcap.sm_supported? "yes":"no");
|
||
if (s->extcap.sm_supported)
|
||
log_printf (" (%s)", s->extcap.sm_algo==2? "3DES":
|
||
(s->extcap.sm_algo==2? "AES-128" : "AES-256"));
|
||
log_info ("Max-Cert3-Len ..: %u\n", s->extcap.max_certlen_3);
|
||
log_info ("Max-Cmd-Data ...: %u\n", s->extcap.max_cmd_data);
|
||
log_info ("Max-Rsp-Data ...: %u\n", s->extcap.max_rsp_data);
|
||
log_info ("Cmd-Chaining ...: %s\n", s->cardcap.cmd_chaining?"yes":"no");
|
||
log_info ("Ext-Lc-Le ......: %s\n", s->cardcap.ext_lc_le?"yes":"no");
|
||
log_info ("Status Indicator: %02X\n", s->status_indicator);
|
||
log_info ("Symmetric crypto: %s\n", s->extcap.has_decrypt? "yes":"no");
|
||
log_info ("Button..........: %s\n", s->extcap.has_button? "yes":"no");
|
||
|
||
log_info ("GnuPG-No-Sync ..: %s\n", s->flags.no_sync? "yes":"no");
|
||
log_info ("GnuPG-Def-PW2 ..: %s\n", s->flags.def_chv2? "yes":"no");
|
||
}
|
||
|
||
|
||
/* Parse the historical bytes in BUFFER of BUFLEN and store them in
|
||
APPLOC. */
|
||
static void
|
||
parse_historical (struct app_local_s *apploc,
|
||
const unsigned char * buffer, size_t buflen)
|
||
{
|
||
/* Example buffer: 00 31 C5 73 C0 01 80 00 90 00 */
|
||
if (buflen < 4)
|
||
{
|
||
log_error ("warning: historical bytes are too short\n");
|
||
return; /* Too short. */
|
||
}
|
||
if (*buffer)
|
||
{
|
||
log_error ("warning: bad category indicator in historical bytes\n");
|
||
return;
|
||
}
|
||
|
||
/* Skip category indicator. */
|
||
buffer++;
|
||
buflen--;
|
||
|
||
/* Get the status indicator. */
|
||
apploc->status_indicator = buffer[buflen-3];
|
||
buflen -= 3;
|
||
|
||
/* Parse the compact TLV. */
|
||
while (buflen)
|
||
{
|
||
unsigned int tag = (*buffer & 0xf0) >> 4;
|
||
unsigned int len = (*buffer & 0x0f);
|
||
if (len+1 > buflen)
|
||
{
|
||
log_error ("warning: bad Compact-TLV in historical bytes\n");
|
||
return; /* Error. */
|
||
}
|
||
buffer++;
|
||
buflen--;
|
||
if (tag == 7 && len == 3)
|
||
{
|
||
/* Card capabilities. */
|
||
apploc->cardcap.cmd_chaining = !!(buffer[2] & 0x80);
|
||
apploc->cardcap.ext_lc_le = !!(buffer[2] & 0x40);
|
||
}
|
||
buffer += len;
|
||
buflen -= len;
|
||
}
|
||
}
|
||
|
||
|
||
/*
|
||
* Check if the OID in an DER encoding is available by GnuPG/libgcrypt,
|
||
* and return the constant string in dotted decimal form.
|
||
* Return NULL if not available.
|
||
* The constant string is not allocated dynamically, never free it.
|
||
*/
|
||
static const char *
|
||
ecc_oid (unsigned char *buf, size_t buflen)
|
||
{
|
||
gcry_mpi_t oid;
|
||
char *oidstr;
|
||
const char *result;
|
||
unsigned char *oidbuf;
|
||
|
||
oidbuf = xtrymalloc (buflen + 1);
|
||
if (!oidbuf)
|
||
return NULL;
|
||
|
||
memcpy (oidbuf+1, buf, buflen);
|
||
oidbuf[0] = buflen;
|
||
oid = gcry_mpi_set_opaque (NULL, oidbuf, (buflen+1) * 8);
|
||
if (!oid)
|
||
{
|
||
xfree (oidbuf);
|
||
return NULL;
|
||
}
|
||
|
||
oidstr = openpgp_oid_to_str (oid);
|
||
gcry_mpi_release (oid);
|
||
if (!oidstr)
|
||
return NULL;
|
||
|
||
result = openpgp_curve_to_oid (oidstr, NULL);
|
||
xfree (oidstr);
|
||
return result;
|
||
}
|
||
|
||
|
||
/* Parse and optionally show the algorithm attributes for KEYNO.
|
||
KEYNO must be in the range 0..2. */
|
||
static void
|
||
parse_algorithm_attribute (app_t app, int keyno)
|
||
{
|
||
unsigned char *buffer;
|
||
size_t buflen;
|
||
void *relptr;
|
||
const char desc[3][5] = {"sign", "encr", "auth"};
|
||
|
||
assert (keyno >=0 && keyno <= 2);
|
||
|
||
app->app_local->keyattr[keyno].key_type = KEY_TYPE_RSA;
|
||
app->app_local->keyattr[keyno].rsa.n_bits = 0;
|
||
|
||
relptr = get_one_do (app, 0xC1+keyno, &buffer, &buflen, NULL);
|
||
if (!relptr)
|
||
{
|
||
log_error ("error reading DO 0x%02X\n", 0xc1+keyno);
|
||
return;
|
||
}
|
||
if (buflen < 1)
|
||
{
|
||
log_error ("error reading DO 0x%02X\n", 0xc1+keyno);
|
||
xfree (relptr);
|
||
return;
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info ("Key-Attr-%s ..: ", desc[keyno]);
|
||
if (*buffer == PUBKEY_ALGO_RSA && (buflen == 5 || buflen == 6))
|
||
{
|
||
app->app_local->keyattr[keyno].rsa.n_bits = (buffer[1]<<8 | buffer[2]);
|
||
app->app_local->keyattr[keyno].rsa.e_bits = (buffer[3]<<8 | buffer[4]);
|
||
app->app_local->keyattr[keyno].rsa.format = 0;
|
||
if (buflen < 6)
|
||
app->app_local->keyattr[keyno].rsa.format = RSA_STD;
|
||
else
|
||
app->app_local->keyattr[keyno].rsa.format = (buffer[5] == 0? RSA_STD :
|
||
buffer[5] == 1? RSA_STD_N :
|
||
buffer[5] == 2? RSA_CRT :
|
||
buffer[5] == 3? RSA_CRT_N :
|
||
RSA_UNKNOWN_FMT);
|
||
|
||
if (opt.verbose)
|
||
log_printf
|
||
("RSA, n=%u, e=%u, fmt=%s\n",
|
||
app->app_local->keyattr[keyno].rsa.n_bits,
|
||
app->app_local->keyattr[keyno].rsa.e_bits,
|
||
app->app_local->keyattr[keyno].rsa.format == RSA_STD? "std" :
|
||
app->app_local->keyattr[keyno].rsa.format == RSA_STD_N?"std+n":
|
||
app->app_local->keyattr[keyno].rsa.format == RSA_CRT? "crt" :
|
||
app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N?"crt+n":"?");
|
||
}
|
||
else if (*buffer == PUBKEY_ALGO_ECDH || *buffer == PUBKEY_ALGO_ECDSA
|
||
|| *buffer == PUBKEY_ALGO_EDDSA)
|
||
{
|
||
const char *oid = ecc_oid (buffer + 1, buflen - 1);
|
||
|
||
if (!oid)
|
||
log_printhex ("Curve with OID not supported: ", buffer+1, buflen-1);
|
||
else
|
||
{
|
||
app->app_local->keyattr[keyno].key_type = KEY_TYPE_ECC;
|
||
app->app_local->keyattr[keyno].ecc.oid = oid;
|
||
if (*buffer == PUBKEY_ALGO_EDDSA
|
||
|| (*buffer == PUBKEY_ALGO_ECDH
|
||
&& !strcmp (app->app_local->keyattr[keyno].ecc.oid,
|
||
"1.3.6.1.4.1.3029.1.5.1")))
|
||
app->app_local->keyattr[keyno].ecc.flags = ECC_FLAG_DJB_TWEAK;
|
||
else
|
||
app->app_local->keyattr[keyno].ecc.flags = 0;
|
||
if (opt.verbose)
|
||
log_printf
|
||
("ECC, curve=%s%s\n", app->app_local->keyattr[keyno].ecc.oid,
|
||
!app->app_local->keyattr[keyno].ecc.flags ? "":
|
||
keyno==1? " (djb-tweak)": " (eddsa)");
|
||
}
|
||
}
|
||
else if (opt.verbose)
|
||
log_printhex ("", buffer, buflen);
|
||
|
||
xfree (relptr);
|
||
}
|
||
|
||
/* Select the OpenPGP application on the card in SLOT. This function
|
||
must be used before any other OpenPGP application functions. */
|
||
gpg_error_t
|
||
app_select_openpgp (app_t app)
|
||
{
|
||
static char const aid[] = { 0xD2, 0x76, 0x00, 0x01, 0x24, 0x01 };
|
||
int slot = app->slot;
|
||
int rc;
|
||
unsigned char *buffer;
|
||
size_t buflen;
|
||
void *relptr;
|
||
|
||
/* Note that the card can't cope with P2=0xCO, thus we need to pass a
|
||
special flag value. */
|
||
rc = iso7816_select_application (slot, aid, sizeof aid, 0x0001);
|
||
if (!rc)
|
||
{
|
||
unsigned int manufacturer;
|
||
|
||
app->apptype = "OPENPGP";
|
||
|
||
app->did_chv1 = 0;
|
||
app->did_chv2 = 0;
|
||
app->did_chv3 = 0;
|
||
app->app_local = NULL;
|
||
|
||
/* The OpenPGP card returns the serial number as part of the
|
||
AID; because we prefer to use OpenPGP serial numbers, we
|
||
replace a possibly already set one from a EF.GDO with this
|
||
one. Note, that for current OpenPGP cards, no EF.GDO exists
|
||
and thus it won't matter at all. */
|
||
rc = iso7816_get_data (slot, 0, 0x004F, &buffer, &buflen);
|
||
if (rc)
|
||
goto leave;
|
||
if (opt.verbose)
|
||
{
|
||
log_info ("AID: ");
|
||
log_printhex ("", buffer, buflen);
|
||
}
|
||
|
||
app->card_version = buffer[6] << 8;
|
||
app->card_version |= buffer[7];
|
||
manufacturer = (buffer[8]<<8 | buffer[9]);
|
||
|
||
xfree (app->serialno);
|
||
app->serialno = buffer;
|
||
app->serialnolen = buflen;
|
||
buffer = NULL;
|
||
app->app_local = xtrycalloc (1, sizeof *app->app_local);
|
||
if (!app->app_local)
|
||
{
|
||
rc = gpg_error (gpg_err_code_from_errno (errno));
|
||
goto leave;
|
||
}
|
||
|
||
app->app_local->manufacturer = manufacturer;
|
||
|
||
if (app->card_version >= 0x0200)
|
||
app->app_local->extcap.is_v2 = 1;
|
||
|
||
|
||
/* Read the historical bytes. */
|
||
relptr = get_one_do (app, 0x5f52, &buffer, &buflen, NULL);
|
||
if (relptr)
|
||
{
|
||
if (opt.verbose)
|
||
{
|
||
log_info ("Historical Bytes: ");
|
||
log_printhex ("", buffer, buflen);
|
||
}
|
||
parse_historical (app->app_local, buffer, buflen);
|
||
xfree (relptr);
|
||
}
|
||
|
||
/* Read the force-chv1 flag. */
|
||
relptr = get_one_do (app, 0x00C4, &buffer, &buflen, NULL);
|
||
if (!relptr)
|
||
{
|
||
log_error (_("can't access %s - invalid OpenPGP card?\n"),
|
||
"CHV Status Bytes");
|
||
goto leave;
|
||
}
|
||
app->force_chv1 = (buflen && *buffer == 0);
|
||
xfree (relptr);
|
||
|
||
/* Read the extended capabilities. */
|
||
relptr = get_one_do (app, 0x00C0, &buffer, &buflen, NULL);
|
||
if (!relptr)
|
||
{
|
||
log_error (_("can't access %s - invalid OpenPGP card?\n"),
|
||
"Extended Capability Flags" );
|
||
goto leave;
|
||
}
|
||
if (buflen)
|
||
{
|
||
app->app_local->extcap.sm_supported = !!(*buffer & 0x80);
|
||
app->app_local->extcap.get_challenge = !!(*buffer & 0x40);
|
||
app->app_local->extcap.key_import = !!(*buffer & 0x20);
|
||
app->app_local->extcap.change_force_chv = !!(*buffer & 0x10);
|
||
app->app_local->extcap.private_dos = !!(*buffer & 0x08);
|
||
app->app_local->extcap.algo_attr_change = !!(*buffer & 0x04);
|
||
app->app_local->extcap.has_decrypt = !!(*buffer & 0x02);
|
||
}
|
||
if (buflen >= 10)
|
||
{
|
||
/* Available with v2 cards. */
|
||
app->app_local->extcap.sm_algo = buffer[1];
|
||
app->app_local->extcap.max_get_challenge
|
||
= (buffer[2] << 8 | buffer[3]);
|
||
app->app_local->extcap.max_certlen_3 = (buffer[4] << 8 | buffer[5]);
|
||
app->app_local->extcap.max_cmd_data = (buffer[6] << 8 | buffer[7]);
|
||
app->app_local->extcap.max_rsp_data = (buffer[8] << 8 | buffer[9]);
|
||
}
|
||
xfree (relptr);
|
||
|
||
/* Some of the first cards accidently don't set the
|
||
CHANGE_FORCE_CHV bit but allow it anyway. */
|
||
if (app->card_version <= 0x0100 && manufacturer == 1)
|
||
app->app_local->extcap.change_force_chv = 1;
|
||
|
||
/* Check optional DO of "General Feature Management" for button. */
|
||
relptr = get_one_do (app, 0x7f74, &buffer, &buflen, NULL);
|
||
if (relptr)
|
||
/* It must be: 03 81 01 20 */
|
||
app->app_local->extcap.has_button = 1;
|
||
|
||
parse_login_data (app);
|
||
|
||
if (opt.verbose)
|
||
show_caps (app->app_local);
|
||
|
||
parse_algorithm_attribute (app, 0);
|
||
parse_algorithm_attribute (app, 1);
|
||
parse_algorithm_attribute (app, 2);
|
||
|
||
if (opt.verbose > 1)
|
||
dump_all_do (slot);
|
||
|
||
app->fnc.deinit = do_deinit;
|
||
app->fnc.learn_status = do_learn_status;
|
||
app->fnc.readcert = do_readcert;
|
||
app->fnc.readkey = do_readkey;
|
||
app->fnc.getattr = do_getattr;
|
||
app->fnc.setattr = do_setattr;
|
||
app->fnc.writecert = do_writecert;
|
||
app->fnc.writekey = do_writekey;
|
||
app->fnc.genkey = do_genkey;
|
||
app->fnc.sign = do_sign;
|
||
app->fnc.auth = do_auth;
|
||
app->fnc.decipher = do_decipher;
|
||
app->fnc.change_pin = do_change_pin;
|
||
app->fnc.check_pin = do_check_pin;
|
||
}
|
||
|
||
leave:
|
||
if (rc)
|
||
do_deinit (app);
|
||
return rc;
|
||
}
|