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c2525d507d
* iso7816.h (iso7816_verify_kp): Remove arguments of CHV and CHVLEN. * iso7816.c (iso7816_verify_kp): Call apdu_keypad_verify. Only handle thecase with PININFO. (iso7816_verify): Call apdu_send_simple. * app-openpgp.c (verify_a_chv, verify_chv3): Follow the change of iso7816_verify_kp. * app-nks.c (verify_pin): Likewise. * app-dinsig.c (verify_pin): Likewise. * apdu.c: Include "iso7816.h". (struct reader_table_s): New memeber function keypad_verify. Add fields verify_ioctl and modify_ioctl in pcsc. (CM_IOCTL_GET_FEATURE_REQUEST, FEATURE_VERIFY_PIN_DIRECT) (FEATURE_MODIFY_PIN_DIRECT): New. (pcsc_control): New. (control_pcsc_direct, control_pcsc_wrapped, control_pcsc) (check_pcsc_keypad, pcsc_keypad_verify): New. (ccid_keypad_verify, apdu_keypad_verify): New. (new_reader_slot): Initialize with check_pcsc_keypad, pcsc_keypad_verify, verify_ioctl and modify_ioctl. (open_ct_reader): Initialize keypad_verify with NULL. (open_ccid_reader): Initialize keypad_verify. (open_rapdu_reader): Initialize keypad_verify with NULL. (apdu_open_reader): Initialize pcsc_control. * pcsc-wrapper.c (load_pcsc_driver): Initialize pcsc_control. (handle_control): New. (main): Handle the case 6 of handle_control.
575 lines
18 KiB
C
575 lines
18 KiB
C
/* app-dinsig.c - The DINSIG (DIN V 66291-1) card application.
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* Copyright (C) 2002, 2004, 2005, 2007, 2008 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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/* The German signature law and its bylaw (SigG and SigV) is currently
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used with an interface specification described in DIN V 66291-1.
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The AID to be used is: 'D27600006601'.
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The file IDs for certificates utilize the generic format:
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Cxyz
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C being the hex digit 'C' (12).
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x being the service indicator:
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'0' := SigG conform digital signature.
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'1' := entity authentication.
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'2' := key encipherment.
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'3' := data encipherment.
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'4' := key agreement.
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other values are reserved for future use.
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y being the security environment number using '0' for cards
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not supporting a SE number.
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z being the certificate type:
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'0' := C.CH (base certificate of card holder) or C.ICC.
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'1' .. '7' := C.CH (business or professional certificate
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of card holder.
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'8' .. 'D' := C.CA (certificate of a CA issue by the Root-CA).
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'E' := C.RCA (self certified certificate of the Root-CA).
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'F' := reserved.
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The file IDs used by default are:
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'1F00' EF.SSD (security service descriptor). [o,o]
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'2F02' EF.GDO (global data objects) [m,m]
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'A000' EF.PROT (signature log). Cyclic file with 20 records of 53 byte.
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Read and update after user authentication. [o,o]
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'B000' EF.PK.RCA.DS (public keys of Root-CA). Size is 512b or size
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of keys. [m (unless a 'C00E' is present),m]
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'B001' EF.PK.CA.DS (public keys of CAs). Size is 512b or size
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of keys. [o,o]
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'C00n' EF.C.CH.DS (digital signature certificate of card holder)
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with n := 0 .. 7. Size is 2k or size of cert. Read and
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update allowed after user authentication. [m,m]
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'C00m' EF.C.CA.DS (digital signature certificate of CA)
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with m := 8 .. E. Size is 1k or size of cert. Read always
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allowed, update after user authentication. [o,o]
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'C100' EF.C.ICC.AUT (AUT certificate of ICC) [o,m]
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'C108' EF.C.CA.AUT (AUT certificate of CA) [o,m]
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'D000' EF.DM (display message) [-,m]
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The letters in brackets indicate optional or mandatory files: The
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first for card terminals under full control and the second for
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"business" card terminals.
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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 <string.h>
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#include <assert.h>
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#include <time.h>
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#include "scdaemon.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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static gpg_error_t
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do_learn_status (app_t app, ctrl_t ctrl, unsigned int flags)
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{
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gpg_error_t err;
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char ct_buf[100], id_buf[100];
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char hexkeygrip[41];
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size_t len, certoff;
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unsigned char *der;
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size_t derlen;
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ksba_cert_t cert;
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int fid;
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(void)flags;
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/* Return the certificate of the card holder. */
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fid = 0xC000;
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len = app_help_read_length_of_cert (app->slot, fid, &certoff);
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if (!len)
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return 0; /* Card has not been personalized. */
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sprintf (ct_buf, "%d", 101);
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sprintf (id_buf, "DINSIG.%04X", fid);
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send_status_info (ctrl, "CERTINFO",
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ct_buf, strlen (ct_buf),
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id_buf, strlen (id_buf),
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NULL, (size_t)0);
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/* Now we need to read the certificate, so that we can get the
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public key out of it. */
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err = iso7816_read_binary (app->slot, certoff, len-certoff, &der, &derlen);
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if (err)
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{
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log_info ("error reading entire certificate from FID 0x%04X: %s\n",
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fid, gpg_strerror (err));
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return 0;
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}
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err = ksba_cert_new (&cert);
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if (err)
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{
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xfree (der);
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return err;
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}
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err = ksba_cert_init_from_mem (cert, der, derlen);
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xfree (der); der = NULL;
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if (err)
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{
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log_error ("failed to parse the certificate at FID 0x%04X: %s\n",
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fid, gpg_strerror (err));
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ksba_cert_release (cert);
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return err;
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}
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err = app_help_get_keygrip_string (cert, hexkeygrip);
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if (err)
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{
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log_error ("failed to calculate the keygrip for FID 0x%04X\n", fid);
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ksba_cert_release (cert);
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return gpg_error (GPG_ERR_CARD);
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}
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ksba_cert_release (cert);
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sprintf (id_buf, "DINSIG.%04X", fid);
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send_status_info (ctrl, "KEYPAIRINFO",
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hexkeygrip, 40,
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id_buf, strlen (id_buf),
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NULL, (size_t)0);
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return 0;
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}
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/* Read the certificate with id CERTID (as returned by learn_status in
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the CERTINFO status lines) and return it in the freshly allocated
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buffer put into CERT and the length of the certificate put into
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CERTLEN.
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FIXME: This needs some cleanups and caching with do_learn_status.
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*/
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static gpg_error_t
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do_readcert (app_t app, const char *certid,
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unsigned char **cert, size_t *certlen)
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{
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int fid;
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gpg_error_t err;
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unsigned char *buffer;
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const unsigned char *p;
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size_t buflen, n;
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int class, tag, constructed, ndef;
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size_t totobjlen, objlen, hdrlen;
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int rootca = 0;
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*cert = NULL;
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*certlen = 0;
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if (strncmp (certid, "DINSIG.", 7) )
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return gpg_error (GPG_ERR_INV_ID);
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certid += 7;
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if (!hexdigitp (certid) || !hexdigitp (certid+1)
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|| !hexdigitp (certid+2) || !hexdigitp (certid+3)
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|| certid[4])
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return gpg_error (GPG_ERR_INV_ID);
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fid = xtoi_4 (certid);
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if (fid != 0xC000 )
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return gpg_error (GPG_ERR_NOT_FOUND);
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/* Read the entire file. fixme: This could be optimized by first
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reading the header to figure out how long the certificate
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actually is. */
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err = iso7816_select_file (app->slot, fid, 0, NULL, NULL);
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if (err)
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{
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log_error ("error selecting FID 0x%04X: %s\n", fid, gpg_strerror (err));
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return err;
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}
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err = iso7816_read_binary (app->slot, 0, 0, &buffer, &buflen);
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if (err)
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{
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log_error ("error reading certificate from FID 0x%04X: %s\n",
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fid, gpg_strerror (err));
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return err;
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}
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if (!buflen || *buffer == 0xff)
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{
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log_info ("no certificate contained in FID 0x%04X\n", fid);
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err = gpg_error (GPG_ERR_NOT_FOUND);
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goto leave;
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}
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/* Now figure something out about the object. */
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p = buffer;
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n = buflen;
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err = parse_ber_header (&p, &n, &class, &tag, &constructed,
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&ndef, &objlen, &hdrlen);
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if (err)
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goto leave;
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if ( class == CLASS_UNIVERSAL && tag == TAG_SEQUENCE && constructed )
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;
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else if ( class == CLASS_UNIVERSAL && tag == TAG_SET && constructed )
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rootca = 1;
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else
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return gpg_error (GPG_ERR_INV_OBJ);
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totobjlen = objlen + hdrlen;
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assert (totobjlen <= buflen);
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err = parse_ber_header (&p, &n, &class, &tag, &constructed,
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&ndef, &objlen, &hdrlen);
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if (err)
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goto leave;
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if (rootca)
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;
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else if (class == CLASS_UNIVERSAL && tag == TAG_OBJECT_ID && !constructed)
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{
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const unsigned char *save_p;
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/* The certificate seems to be contained in a userCertificate
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container. Skip this and assume the following sequence is
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the certificate. */
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if (n < objlen)
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{
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err = gpg_error (GPG_ERR_INV_OBJ);
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goto leave;
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}
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p += objlen;
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n -= objlen;
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save_p = p;
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err = parse_ber_header (&p, &n, &class, &tag, &constructed,
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&ndef, &objlen, &hdrlen);
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if (err)
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goto leave;
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if ( !(class == CLASS_UNIVERSAL && tag == TAG_SEQUENCE && constructed) )
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return gpg_error (GPG_ERR_INV_OBJ);
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totobjlen = objlen + hdrlen;
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assert (save_p + totobjlen <= buffer + buflen);
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memmove (buffer, save_p, totobjlen);
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}
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*cert = buffer;
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buffer = NULL;
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*certlen = totobjlen;
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leave:
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xfree (buffer);
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return err;
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}
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/* Verify the PIN if required. */
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static gpg_error_t
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verify_pin (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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{
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const char *s;
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int rc;
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iso7816_pininfo_t pininfo;
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if ( app->did_chv1 && !app->force_chv1 )
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return 0; /* No need to verify it again. */
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memset (&pininfo, 0, sizeof pininfo);
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pininfo.mode = 1;
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pininfo.minlen = 6;
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pininfo.maxlen = 8;
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if (!opt.disable_keypad
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&& !iso7816_check_keypad (app->slot, ISO7816_VERIFY, &pininfo) )
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{
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rc = pincb (pincb_arg,
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_("||Please enter your PIN at the reader's keypad"),
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NULL);
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if (rc)
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{
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log_info (_("PIN callback returned error: %s\n"),
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gpg_strerror (rc));
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return rc;
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}
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rc = iso7816_verify_kp (app->slot, 0x81, &pininfo);
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/* Dismiss the prompt. */
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pincb (pincb_arg, NULL, NULL);
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}
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else /* No Keypad. */
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{
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char *pinvalue;
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rc = pincb (pincb_arg, "PIN", &pinvalue);
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if (rc)
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{
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log_info ("PIN callback returned error: %s\n", gpg_strerror (rc));
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return rc;
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}
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/* We require the PIN to be at least 6 and at max 8 bytes.
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According to the specs, this should all be ASCII. */
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for (s=pinvalue; digitp (s); s++)
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;
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if (*s)
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{
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log_error ("Non-numeric digits found in PIN\n");
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xfree (pinvalue);
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return gpg_error (GPG_ERR_BAD_PIN);
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}
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if (strlen (pinvalue) < pininfo.minlen)
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{
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log_error ("PIN is too short; minimum length is %d\n",
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pininfo.minlen);
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xfree (pinvalue);
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return gpg_error (GPG_ERR_BAD_PIN);
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}
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else if (strlen (pinvalue) > pininfo.maxlen)
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{
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log_error ("PIN is too large; maximum length is %d\n",
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pininfo.maxlen);
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xfree (pinvalue);
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return gpg_error (GPG_ERR_BAD_PIN);
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}
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rc = iso7816_verify (app->slot, 0x81, pinvalue, strlen (pinvalue));
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if (gpg_err_code (rc) == GPG_ERR_INV_VALUE)
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{
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/* We assume that ISO 9564-1 encoding is used and we failed
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because the first nibble we passed was 3 and not 2. DIN
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says something about looking up such an encoding in the
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SSD but I was not able to find any tag relevant to
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this. */
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char paddedpin[8];
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int i, ndigits;
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for (ndigits=0, s=pinvalue; *s; ndigits++, s++)
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;
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i = 0;
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paddedpin[i++] = 0x20 | (ndigits & 0x0f);
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for (s=pinvalue; i < sizeof paddedpin && *s && s[1]; s = s+2 )
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paddedpin[i++] = (((*s - '0') << 4) | ((s[1] - '0') & 0x0f));
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if (i < sizeof paddedpin && *s)
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paddedpin[i++] = (((*s - '0') << 4) | 0x0f);
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while (i < sizeof paddedpin)
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paddedpin[i++] = 0xff;
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rc = iso7816_verify (app->slot, 0x81, paddedpin, sizeof paddedpin);
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}
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xfree (pinvalue);
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}
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if (rc)
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{
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log_error ("verify PIN failed\n");
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return rc;
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}
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app->did_chv1 = 1;
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return 0;
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}
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/* Create the signature and return the allocated result in OUTDATA.
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If a PIN is required the PINCB will be used to ask for the PIN;
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that callback should return the PIN in an allocated buffer and
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store that in the 3rd argument. */
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static gpg_error_t
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do_sign (app_t app, const char *keyidstr, int hashalgo,
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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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{
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static unsigned char sha1_prefix[15] = /* Object ID is 1.3.14.3.2.26 */
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{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03,
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0x02, 0x1a, 0x05, 0x00, 0x04, 0x14 };
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static unsigned char rmd160_prefix[15] = /* Object ID is 1.3.36.3.2.1 */
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{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x24, 0x03,
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0x02, 0x01, 0x05, 0x00, 0x04, 0x14 };
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static unsigned char sha256_prefix[19] = /* OID is 2.16.840.1.101.3.4.2.1 */
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{ 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
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0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05,
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0x00, 0x04, 0x20 };
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int rc;
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int fid;
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unsigned char data[19+32]; /* Must be large enough for a SHA-256 digest
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+ the largest OID _prefix above. */
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int datalen;
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if (!keyidstr || !*keyidstr)
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return gpg_error (GPG_ERR_INV_VALUE);
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if (indatalen != 20 && indatalen != 16 && indatalen != 32
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&& indatalen != (15+20) && indatalen != (19+32))
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return gpg_error (GPG_ERR_INV_VALUE);
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/* Check that the provided ID is vaid. This is not really needed
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but we do it to to enforce correct usage by the caller. */
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if (strncmp (keyidstr, "DINSIG.", 7) )
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return gpg_error (GPG_ERR_INV_ID);
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keyidstr += 7;
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if (!hexdigitp (keyidstr) || !hexdigitp (keyidstr+1)
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|| !hexdigitp (keyidstr+2) || !hexdigitp (keyidstr+3)
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|| keyidstr[4])
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return gpg_error (GPG_ERR_INV_ID);
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fid = xtoi_4 (keyidstr);
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if (fid != 0xC000)
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return gpg_error (GPG_ERR_NOT_FOUND);
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/* Prepare the DER object from INDATA. */
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datalen = 35;
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if (indatalen == 15+20)
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{
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/* Alright, the caller was so kind to send us an already
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prepared DER object. Check that it is what we want and that
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it matches the hash algorithm. */
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if (hashalgo == GCRY_MD_SHA1 && !memcmp (indata, sha1_prefix, 15))
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;
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else if (hashalgo == GCRY_MD_RMD160 && !memcmp (indata, rmd160_prefix,15))
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;
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else
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return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
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memcpy (data, indata, indatalen);
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}
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else if (indatalen == 19+32)
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{
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/* Alright, the caller was so kind to send us an already
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|
prepared DER object. Check that it is what we want and that
|
|
it matches the hash algorithm. */
|
|
datalen = indatalen;
|
|
if (hashalgo == GCRY_MD_SHA256 && !memcmp (indata, sha256_prefix, 19))
|
|
;
|
|
else if (hashalgo == GCRY_MD_SHA1 && !memcmp (indata, sha256_prefix, 19))
|
|
{
|
|
/* Fixme: This is a kludge. A better solution is not to use
|
|
SHA1 as default but use an autodetection. However this
|
|
needs changes in all app-*.c */
|
|
hashalgo = GCRY_MD_SHA256;
|
|
datalen = indatalen;
|
|
}
|
|
else
|
|
return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
|
|
memcpy (data, indata, indatalen);
|
|
}
|
|
else
|
|
{
|
|
int len = 15;
|
|
if (hashalgo == GCRY_MD_SHA1)
|
|
memcpy (data, sha1_prefix, len);
|
|
else if (hashalgo == GCRY_MD_RMD160)
|
|
memcpy (data, rmd160_prefix, len);
|
|
else if (hashalgo == GCRY_MD_SHA256)
|
|
{
|
|
len = 19;
|
|
datalen = len + indatalen;
|
|
memcpy (data, sha256_prefix, len);
|
|
}
|
|
else
|
|
return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
|
|
memcpy (data+len, indata, indatalen);
|
|
}
|
|
|
|
rc = verify_pin (app, pincb, pincb_arg);
|
|
if (!rc)
|
|
rc = iso7816_compute_ds (app->slot, 0, data, datalen, 0,
|
|
outdata, outdatalen);
|
|
return rc;
|
|
}
|
|
|
|
|
|
#if 0
|
|
#warning test function - works but may brick your card
|
|
/* Handle the PASSWD command. CHVNOSTR is currently ignored; we
|
|
always use VHV0. RESET_MODE is not yet implemented. */
|
|
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)
|
|
{
|
|
gpg_error_t err;
|
|
char *pinvalue;
|
|
const char *oldpin;
|
|
size_t oldpinlen;
|
|
|
|
if ((flags & APP_CHANGE_FLAG_RESET))
|
|
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
|
|
|
|
if ((flags & APP_CHANGE_FLAG_NULLPIN))
|
|
{
|
|
/* With the nullpin flag, we do not verify the PIN - it would fail
|
|
if the Nullpin is still set. */
|
|
oldpin = "\0\0\0\0\0";
|
|
oldpinlen = 6;
|
|
}
|
|
else
|
|
{
|
|
err = verify_pin (app, pincb, pincb_arg);
|
|
if (err)
|
|
return err;
|
|
oldpin = NULL;
|
|
oldpinlen = 0;
|
|
}
|
|
|
|
/* 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. */
|
|
err = pincb (pincb_arg, _("|N|Initial New PIN"), &pinvalue);
|
|
if (err)
|
|
{
|
|
log_error (_("error getting new PIN: %s\n"), gpg_strerror (err));
|
|
return err;
|
|
}
|
|
|
|
err = iso7816_change_reference_data (app->slot, 0x81,
|
|
oldpin, oldpinlen,
|
|
pinvalue, strlen (pinvalue));
|
|
xfree (pinvalue);
|
|
return err;
|
|
}
|
|
#endif /*0*/
|
|
|
|
|
|
/* Select the DINSIG application on the card in SLOT. This function
|
|
must be used before any other DINSIG application functions. */
|
|
gpg_error_t
|
|
app_select_dinsig (app_t app)
|
|
{
|
|
static char const aid[] = { 0xD2, 0x76, 0x00, 0x00, 0x66, 0x01 };
|
|
int slot = app->slot;
|
|
int rc;
|
|
|
|
rc = iso7816_select_application (slot, aid, sizeof aid, 0);
|
|
if (!rc)
|
|
{
|
|
app->apptype = "DINSIG";
|
|
|
|
app->fnc.learn_status = do_learn_status;
|
|
app->fnc.readcert = do_readcert;
|
|
app->fnc.getattr = NULL;
|
|
app->fnc.setattr = NULL;
|
|
app->fnc.genkey = NULL;
|
|
app->fnc.sign = do_sign;
|
|
app->fnc.auth = NULL;
|
|
app->fnc.decipher = NULL;
|
|
app->fnc.change_pin = NULL /*do_change_pin*/;
|
|
app->fnc.check_pin = NULL;
|
|
|
|
app->force_chv1 = 1;
|
|
}
|
|
|
|
return rc;
|
|
}
|