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![Werner Koch](/assets/img/avatar_default.png)
* g10/gpg.h (MAX_FORMATTED_FINGERPRINT_LEN): New. * g10/keyid.c (hexfingerprint): Add optional args BUFFER and BUFLEN. Change all callers. (format_hexfingerprint): New. * g10/keylist.c (print_fingerprint): Change to use hexfingerprint. * g10/tofu.c (fingerprint_format): Remove. Replace calls by format_hexfingerprint. Signed-off-by: Werner Koch <wk@gnupg.org>
893 lines
20 KiB
C
893 lines
20 KiB
C
/* keyid.c - key ID and fingerprint handling
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* Copyright (C) 1998, 1999, 2000, 2001, 2003,
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* 2004, 2006, 2010 Free Software Foundation, Inc.
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* Copyright (C) 2014 Werner Koch
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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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#include <config.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 <errno.h>
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#include <time.h>
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#include <assert.h>
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#include "gpg.h"
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#include "util.h"
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#include "main.h"
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#include "packet.h"
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#include "options.h"
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#include "keydb.h"
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#include "i18n.h"
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#include "rmd160.h"
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#include "host2net.h"
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#define KEYID_STR_SIZE 19
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#ifdef HAVE_UNSIGNED_TIME_T
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# define IS_INVALID_TIME_T(a) ((a) == (time_t)(-1))
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#else
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/* Error or 32 bit time_t and value after 2038-01-19. */
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# define IS_INVALID_TIME_T(a) ((a) < 0)
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#endif
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/* Return a letter describing the public key algorithms. */
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int
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pubkey_letter( int algo )
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{
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switch (algo)
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{
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case PUBKEY_ALGO_RSA: return 'R' ;
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case PUBKEY_ALGO_RSA_E: return 'r' ;
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case PUBKEY_ALGO_RSA_S: return 's' ;
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case PUBKEY_ALGO_ELGAMAL_E: return 'g' ;
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case PUBKEY_ALGO_ELGAMAL: return 'G' ;
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case PUBKEY_ALGO_DSA: return 'D' ;
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case PUBKEY_ALGO_ECDH: return 'e' ; /* ECC DH (encrypt only) */
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case PUBKEY_ALGO_ECDSA: return 'E' ; /* ECC DSA (sign only) */
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case PUBKEY_ALGO_EDDSA: return 'E' ; /* ECC EdDSA (sign only) */
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default: return '?';
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}
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}
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/* Return a string describing the public key algorithm and the
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keysize. For elliptic curves the functions prints the name of the
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curve because the keysize is a property of the curve. The string
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is copied to the supplied buffer up a length of BUFSIZE-1.
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Examples for the output are:
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"rsa2048" - RSA with 2048 bit
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"elg1024" - Elgamal with 1024 bit
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"ed25519" - ECC using the curve Ed25519.
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"E_1.2.3.4" - ECC using the unsupported curve with OID "1.2.3.4".
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"E_1.3.6.1.4.1.11591.2.12242973" ECC with a bogus OID.
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"unknown_N" - Unknown OpenPGP algorithm N.
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If the option --legacy-list-mode is active, the output use the
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legacy format:
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"2048R" - RSA with 2048 bit
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"1024g" - Elgamal with 1024 bit
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"256E" - ECDSA using a curve with 256 bit
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The macro PUBKEY_STRING_SIZE may be used to allocate a buffer with
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a suitable size.*/
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char *
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pubkey_string (PKT_public_key *pk, char *buffer, size_t bufsize)
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{
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const char *prefix = NULL;
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if (opt.legacy_list_mode)
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{
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snprintf (buffer, bufsize, "%4u%c",
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nbits_from_pk (pk), pubkey_letter (pk->pubkey_algo));
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return buffer;
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}
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switch (pk->pubkey_algo)
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{
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case PUBKEY_ALGO_RSA:
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case PUBKEY_ALGO_RSA_E:
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case PUBKEY_ALGO_RSA_S: prefix = "rsa"; break;
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case PUBKEY_ALGO_ELGAMAL_E: prefix = "elg"; break;
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case PUBKEY_ALGO_DSA: prefix = "dsa"; break;
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case PUBKEY_ALGO_ELGAMAL: prefix = "xxx"; break;
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case PUBKEY_ALGO_ECDH:
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case PUBKEY_ALGO_ECDSA:
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case PUBKEY_ALGO_EDDSA: prefix = ""; break;
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}
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if (prefix && *prefix)
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snprintf (buffer, bufsize, "%s%u", prefix, nbits_from_pk (pk));
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else if (prefix)
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{
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char *curve = openpgp_oid_to_str (pk->pkey[0]);
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const char *name = openpgp_oid_to_curve (curve, 0);
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if (name)
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snprintf (buffer, bufsize, "%s", name);
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else if (curve)
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snprintf (buffer, bufsize, "E_%s", curve);
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else
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snprintf (buffer, bufsize, "E_error");
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xfree (curve);
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}
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else
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snprintf (buffer, bufsize, "unknown_%u", (unsigned int)pk->pubkey_algo);
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return buffer;
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}
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/* Hash a public key. This function is useful for v4 fingerprints and
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for v3 or v4 key signing. */
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void
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hash_public_key (gcry_md_hd_t md, PKT_public_key *pk)
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{
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unsigned int n = 6;
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unsigned int nn[PUBKEY_MAX_NPKEY];
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byte *pp[PUBKEY_MAX_NPKEY];
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int i;
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unsigned int nbits;
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size_t nbytes;
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int npkey = pubkey_get_npkey (pk->pubkey_algo);
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/* FIXME: We can avoid the extra malloc by calling only the first
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mpi_print here which computes the required length and calling the
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real mpi_print only at the end. The speed advantage would only be
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for ECC (opaque MPIs) or if we could implement an mpi_print
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variant with a callback handler to do the hashing. */
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if (npkey==0 && pk->pkey[0]
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&& gcry_mpi_get_flag (pk->pkey[0], GCRYMPI_FLAG_OPAQUE))
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{
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pp[0] = gcry_mpi_get_opaque (pk->pkey[0], &nbits);
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nn[0] = (nbits+7)/8;
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n+=nn[0];
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}
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else
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{
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for (i=0; i < npkey; i++ )
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{
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if (!pk->pkey[i])
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{
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/* This case may only happen if the parsing of the MPI
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failed but the key was anyway created. May happen
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during "gpg KEYFILE". */
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pp[i] = NULL;
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nn[i] = 0;
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}
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else if (gcry_mpi_get_flag (pk->pkey[i], GCRYMPI_FLAG_OPAQUE))
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{
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const void *p;
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p = gcry_mpi_get_opaque (pk->pkey[i], &nbits);
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pp[i] = xmalloc ((nbits+7)/8);
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if (p)
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memcpy (pp[i], p, (nbits+7)/8);
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else
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pp[i] = NULL;
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nn[i] = (nbits+7)/8;
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n += nn[i];
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}
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else
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{
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if (gcry_mpi_print (GCRYMPI_FMT_PGP, NULL, 0,
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&nbytes, pk->pkey[i]))
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BUG ();
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pp[i] = xmalloc (nbytes);
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if (gcry_mpi_print (GCRYMPI_FMT_PGP, pp[i], nbytes,
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&nbytes, pk->pkey[i]))
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BUG ();
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nn[i] = nbytes;
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n += nn[i];
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}
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}
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}
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gcry_md_putc ( md, 0x99 ); /* ctb */
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/* What does it mean if n is greater than than 0xFFFF ? */
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gcry_md_putc ( md, n >> 8 ); /* 2 byte length header */
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gcry_md_putc ( md, n );
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gcry_md_putc ( md, pk->version );
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gcry_md_putc ( md, pk->timestamp >> 24 );
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gcry_md_putc ( md, pk->timestamp >> 16 );
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gcry_md_putc ( md, pk->timestamp >> 8 );
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gcry_md_putc ( md, pk->timestamp );
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gcry_md_putc ( md, pk->pubkey_algo );
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if(npkey==0 && pk->pkey[0]
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&& gcry_mpi_get_flag (pk->pkey[0], GCRYMPI_FLAG_OPAQUE))
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{
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if (pp[0])
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gcry_md_write (md, pp[0], nn[0]);
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}
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else
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{
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for(i=0; i < npkey; i++ )
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{
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if (pp[i])
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gcry_md_write ( md, pp[i], nn[i] );
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xfree(pp[i]);
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}
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}
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}
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static gcry_md_hd_t
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do_fingerprint_md( PKT_public_key *pk )
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{
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gcry_md_hd_t md;
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if (gcry_md_open (&md, DIGEST_ALGO_SHA1, 0))
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BUG ();
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hash_public_key(md,pk);
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gcry_md_final( md );
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return md;
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}
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/* fixme: Check whether we can replace this function or if not
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describe why we need it. */
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u32
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v3_keyid (gcry_mpi_t a, u32 *ki)
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{
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byte *buffer, *p;
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size_t nbytes;
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if (gcry_mpi_print (GCRYMPI_FMT_USG, NULL, 0, &nbytes, a ))
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BUG ();
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/* fixme: allocate it on the stack */
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buffer = xmalloc (nbytes);
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if (gcry_mpi_print( GCRYMPI_FMT_USG, buffer, nbytes, NULL, a ))
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BUG ();
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if (nbytes < 8) /* oops */
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ki[0] = ki[1] = 0;
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else
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{
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p = buffer + nbytes - 8;
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ki[0] = buf32_to_u32 (p);
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p += 4;
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ki[1] = buf32_to_u32 (p);
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}
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xfree (buffer);
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return ki[1];
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}
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size_t
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keystrlen(void)
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{
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switch(opt.keyid_format)
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{
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case KF_SHORT:
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return 8;
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case KF_LONG:
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return 16;
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case KF_0xSHORT:
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return 10;
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case KF_0xLONG:
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return 18;
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default:
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BUG();
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}
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}
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const char *
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keystr (u32 *keyid)
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{
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static char keyid_str[KEYID_STR_SIZE];
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switch (opt.keyid_format)
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{
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case KF_SHORT:
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snprintf (keyid_str, sizeof keyid_str, "%08lX", (ulong)keyid[1]);
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break;
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case KF_LONG:
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if (keyid[0])
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snprintf (keyid_str, sizeof keyid_str, "%08lX%08lX",
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(ulong)keyid[0], (ulong)keyid[1]);
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else
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snprintf (keyid_str, sizeof keyid_str, "%08lX", (ulong)keyid[1]);
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break;
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case KF_0xSHORT:
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snprintf (keyid_str, sizeof keyid_str, "0x%08lX", (ulong)keyid[1]);
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break;
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case KF_0xLONG:
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if(keyid[0])
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snprintf (keyid_str, sizeof keyid_str, "0x%08lX%08lX",
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(ulong)keyid[0],(ulong)keyid[1]);
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else
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snprintf (keyid_str, sizeof keyid_str, "0x%08lX", (ulong)keyid[1]);
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break;
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default:
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BUG();
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}
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return keyid_str;
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}
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const char *
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keystr_with_sub (u32 *main_kid, u32 *sub_kid)
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{
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static char buffer[KEYID_STR_SIZE+1+KEYID_STR_SIZE];
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char *p;
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mem2str (buffer, keystr (main_kid), KEYID_STR_SIZE);
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if (sub_kid)
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{
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p = buffer + strlen (buffer);
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*p++ = '/';
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mem2str (p, keystr (sub_kid), KEYID_STR_SIZE);
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}
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return buffer;
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}
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const char *
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keystr_from_pk(PKT_public_key *pk)
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{
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keyid_from_pk(pk,NULL);
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return keystr(pk->keyid);
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}
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const char *
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keystr_from_pk_with_sub (PKT_public_key *main_pk, PKT_public_key *sub_pk)
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{
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keyid_from_pk (main_pk, NULL);
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if (sub_pk)
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keyid_from_pk (sub_pk, NULL);
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return keystr_with_sub (main_pk->keyid, sub_pk? sub_pk->keyid:NULL);
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}
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const char *
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keystr_from_desc(KEYDB_SEARCH_DESC *desc)
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{
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switch(desc->mode)
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{
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case KEYDB_SEARCH_MODE_LONG_KID:
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case KEYDB_SEARCH_MODE_SHORT_KID:
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return keystr(desc->u.kid);
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case KEYDB_SEARCH_MODE_FPR20:
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{
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u32 keyid[2];
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keyid[0] = buf32_to_u32 (desc->u.fpr+12);
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keyid[1] = buf32_to_u32 (desc->u.fpr+16);
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return keystr(keyid);
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}
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case KEYDB_SEARCH_MODE_FPR16:
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return "?v3 fpr?";
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default:
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BUG();
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}
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}
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/*
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* Get the keyid from the public key and put it into keyid
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* if this is not NULL. Return the 32 low bits of the keyid.
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*/
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u32
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keyid_from_pk (PKT_public_key *pk, u32 *keyid)
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{
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u32 lowbits;
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u32 dummy_keyid[2];
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if (!keyid)
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keyid = dummy_keyid;
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if( pk->keyid[0] || pk->keyid[1] )
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{
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keyid[0] = pk->keyid[0];
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keyid[1] = pk->keyid[1];
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lowbits = keyid[1];
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}
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else
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{
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const byte *dp;
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gcry_md_hd_t md;
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md = do_fingerprint_md(pk);
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if(md)
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{
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dp = gcry_md_read ( md, 0 );
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keyid[0] = buf32_to_u32 (dp+12);
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keyid[1] = buf32_to_u32 (dp+16);
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lowbits = keyid[1];
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gcry_md_close (md);
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pk->keyid[0] = keyid[0];
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pk->keyid[1] = keyid[1];
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}
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else
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pk->keyid[0]=pk->keyid[1]=keyid[0]=keyid[1]=lowbits=0xFFFFFFFF;
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}
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return lowbits;
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}
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/*
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* Get the keyid from the fingerprint. This function is simple for most
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* keys, but has to do a keylookup for old stayle keys.
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*/
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u32
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keyid_from_fingerprint( const byte *fprint, size_t fprint_len, u32 *keyid )
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{
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u32 dummy_keyid[2];
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if( !keyid )
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keyid = dummy_keyid;
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if (fprint_len != 20)
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{
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/* This is special as we have to lookup the key first. */
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PKT_public_key pk;
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int rc;
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memset (&pk, 0, sizeof pk);
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rc = get_pubkey_byfprint (&pk, NULL, fprint, fprint_len);
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if( rc )
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{
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log_error("Oops: keyid_from_fingerprint: no pubkey\n");
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keyid[0] = 0;
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keyid[1] = 0;
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}
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else
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keyid_from_pk (&pk, keyid);
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}
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else
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{
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const byte *dp = fprint;
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keyid[0] = buf32_to_u32 (dp+12);
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keyid[1] = buf32_to_u32 (dp+16);
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}
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return keyid[1];
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}
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u32
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keyid_from_sig (PKT_signature *sig, u32 *keyid)
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{
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if( keyid )
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{
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keyid[0] = sig->keyid[0];
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keyid[1] = sig->keyid[1];
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}
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return sig->keyid[1];
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}
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byte *
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namehash_from_uid (PKT_user_id *uid)
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{
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if (!uid->namehash)
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{
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uid->namehash = xmalloc (20);
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if (uid->attrib_data)
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rmd160_hash_buffer (uid->namehash, uid->attrib_data, uid->attrib_len);
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else
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rmd160_hash_buffer (uid->namehash, uid->name, uid->len);
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}
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return uid->namehash;
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}
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/*
|
||
* Return the number of bits used in PK.
|
||
*/
|
||
unsigned int
|
||
nbits_from_pk (PKT_public_key *pk)
|
||
{
|
||
return pubkey_nbits (pk->pubkey_algo, pk->pkey);
|
||
}
|
||
|
||
|
||
static const char *
|
||
mk_datestr (char *buffer, time_t atime)
|
||
{
|
||
struct tm *tp;
|
||
|
||
if (IS_INVALID_TIME_T (atime))
|
||
strcpy (buffer, "????" "-??" "-??"); /* Mark this as invalid. */
|
||
else
|
||
{
|
||
tp = gmtime (&atime);
|
||
sprintf (buffer,"%04d-%02d-%02d",
|
||
1900+tp->tm_year, tp->tm_mon+1, tp->tm_mday );
|
||
}
|
||
return buffer;
|
||
}
|
||
|
||
|
||
/*
|
||
* return a string with the creation date of the pk
|
||
* Note: this is alloced in a static buffer.
|
||
* Format is: yyyy-mm-dd
|
||
*/
|
||
const char *
|
||
datestr_from_pk (PKT_public_key *pk)
|
||
{
|
||
static char buffer[11+5];
|
||
time_t atime = pk->timestamp;
|
||
|
||
return mk_datestr (buffer, atime);
|
||
}
|
||
|
||
|
||
const char *
|
||
datestr_from_sig (PKT_signature *sig )
|
||
{
|
||
static char buffer[11+5];
|
||
time_t atime = sig->timestamp;
|
||
|
||
return mk_datestr (buffer, atime);
|
||
}
|
||
|
||
|
||
const char *
|
||
expirestr_from_pk (PKT_public_key *pk)
|
||
{
|
||
static char buffer[11+5];
|
||
time_t atime;
|
||
|
||
if (!pk->expiredate)
|
||
return _("never ");
|
||
atime = pk->expiredate;
|
||
return mk_datestr (buffer, atime);
|
||
}
|
||
|
||
|
||
const char *
|
||
expirestr_from_sig (PKT_signature *sig)
|
||
{
|
||
static char buffer[11+5];
|
||
time_t atime;
|
||
|
||
if (!sig->expiredate)
|
||
return _("never ");
|
||
atime=sig->expiredate;
|
||
return mk_datestr (buffer, atime);
|
||
}
|
||
|
||
|
||
const char *
|
||
revokestr_from_pk( PKT_public_key *pk )
|
||
{
|
||
static char buffer[11+5];
|
||
time_t atime;
|
||
|
||
if(!pk->revoked.date)
|
||
return _("never ");
|
||
atime=pk->revoked.date;
|
||
return mk_datestr (buffer, atime);
|
||
}
|
||
|
||
|
||
const char *
|
||
usagestr_from_pk (PKT_public_key *pk, int fill)
|
||
{
|
||
static char buffer[10];
|
||
int i = 0;
|
||
unsigned int use = pk->pubkey_usage;
|
||
|
||
if ( use & PUBKEY_USAGE_SIG )
|
||
buffer[i++] = 'S';
|
||
|
||
if ( use & PUBKEY_USAGE_CERT )
|
||
buffer[i++] = 'C';
|
||
|
||
if ( use & PUBKEY_USAGE_ENC )
|
||
buffer[i++] = 'E';
|
||
|
||
if ( (use & PUBKEY_USAGE_AUTH) )
|
||
buffer[i++] = 'A';
|
||
|
||
while (fill && i < 4)
|
||
buffer[i++] = ' ';
|
||
|
||
buffer[i] = 0;
|
||
return buffer;
|
||
}
|
||
|
||
|
||
const char *
|
||
colon_strtime (u32 t)
|
||
{
|
||
static char buf[20];
|
||
|
||
if (!t)
|
||
return "";
|
||
snprintf (buf, sizeof buf, "%lu", (ulong)t);
|
||
return buf;
|
||
}
|
||
|
||
const char *
|
||
colon_datestr_from_pk (PKT_public_key *pk)
|
||
{
|
||
static char buf[20];
|
||
|
||
snprintf (buf, sizeof buf, "%lu", (ulong)pk->timestamp);
|
||
return buf;
|
||
}
|
||
|
||
|
||
const char *
|
||
colon_datestr_from_sig (PKT_signature *sig)
|
||
{
|
||
static char buf[20];
|
||
|
||
snprintf (buf, sizeof buf, "%lu", (ulong)sig->timestamp);
|
||
return buf;
|
||
}
|
||
|
||
const char *
|
||
colon_expirestr_from_sig (PKT_signature *sig)
|
||
{
|
||
static char buf[20];
|
||
|
||
if (!sig->expiredate)
|
||
return "";
|
||
|
||
snprintf (buf, sizeof buf,"%lu", (ulong)sig->expiredate);
|
||
return buf;
|
||
}
|
||
|
||
|
||
/*
|
||
* Return a byte array with the fingerprint for the given PK/SK
|
||
* The length of the array is returned in ret_len. Caller must free
|
||
* the array or provide an array of length MAX_FINGERPRINT_LEN.
|
||
*/
|
||
byte *
|
||
fingerprint_from_pk (PKT_public_key *pk, byte *array, size_t *ret_len)
|
||
{
|
||
const byte *dp;
|
||
size_t len;
|
||
gcry_md_hd_t md;
|
||
|
||
md = do_fingerprint_md(pk);
|
||
dp = gcry_md_read( md, 0 );
|
||
len = gcry_md_get_algo_dlen (gcry_md_get_algo (md));
|
||
assert( len <= MAX_FINGERPRINT_LEN );
|
||
if (!array)
|
||
array = xmalloc ( len );
|
||
memcpy (array, dp, len );
|
||
pk->keyid[0] = buf32_to_u32 (dp+12);
|
||
pk->keyid[1] = buf32_to_u32 (dp+16);
|
||
gcry_md_close( md);
|
||
|
||
if (ret_len)
|
||
*ret_len = len;
|
||
return array;
|
||
}
|
||
|
||
|
||
/* Return an allocated buffer with the fingerprint of PK formatted as
|
||
a plain hexstring. If BUFFER is NULL the result is a malloc'd
|
||
string. If BUFFER is not NULL the result will be copied into this
|
||
buffer. In the latter case BUFLEN describes the length of the
|
||
buffer; if this is too short the function terminates the process.
|
||
Returns a malloc'ed string or BUFFER. A suitable length for BUFFER
|
||
is (2*MAX_FINGERPRINT_LEN + 1). */
|
||
char *
|
||
hexfingerprint (PKT_public_key *pk, char *buffer, size_t buflen)
|
||
{
|
||
unsigned char fpr[MAX_FINGERPRINT_LEN];
|
||
size_t len;
|
||
|
||
fingerprint_from_pk (pk, fpr, &len);
|
||
if (!buffer)
|
||
buffer = xmalloc (2 * len + 1);
|
||
else if (buflen < 2*len+1)
|
||
log_fatal ("%s: buffer too short (%zu)\n", __func__, buflen);
|
||
bin2hex (fpr, len, buffer);
|
||
return buffer;
|
||
}
|
||
|
||
|
||
/* Pretty print a hex fingerprint. If BUFFER is NULL the result is a
|
||
malloc'd string. If BUFFER is not NULL the result will be copied
|
||
into this buffer. In the latter case BUFLEN describes the length
|
||
of the buffer; if this is too short the function terminates the
|
||
process. Returns a malloc'ed string or BUFFER. A suitable length
|
||
for BUFFER is (MAX_FORMATTED_FINGERPRINT_LEN + 1). */
|
||
char *
|
||
format_hexfingerprint (const char *fingerprint, char *buffer, size_t buflen)
|
||
{
|
||
int hexlen = strlen (fingerprint);
|
||
int space;
|
||
int i, j;
|
||
|
||
if (hexlen == 40) /* v4 fingerprint */
|
||
{
|
||
space = (/* The characters and the NUL. */
|
||
40 + 1
|
||
/* After every fourth character, we add a space (except
|
||
the last). */
|
||
+ 40 / 4 - 1
|
||
/* Half way through we add a second space. */
|
||
+ 1);
|
||
}
|
||
else /* Other fingerprint versions - print as is. */
|
||
{
|
||
space = hexlen + 1;
|
||
}
|
||
|
||
if (!buffer)
|
||
buffer = xmalloc (space);
|
||
else if (buflen < space)
|
||
log_fatal ("%s: buffer too short (%zu)\n", __func__, buflen);
|
||
|
||
if (hexlen == 40) /* v4 fingerprint */
|
||
{
|
||
for (i = 0, j = 0; i < 40; i ++)
|
||
{
|
||
if (i && i % 4 == 0)
|
||
buffer[j ++] = ' ';
|
||
if (i == 40 / 2)
|
||
buffer[j ++] = ' ';
|
||
|
||
buffer[j ++] = fingerprint[i];
|
||
}
|
||
buffer[j ++] = 0;
|
||
assert (j == space);
|
||
}
|
||
else
|
||
{
|
||
strcpy (buffer, fingerprint);
|
||
}
|
||
|
||
return buffer;
|
||
}
|
||
|
||
|
||
|
||
/* Return the so called KEYGRIP which is the SHA-1 hash of the public
|
||
key parameters expressed as an canoncial encoded S-Exp. ARRAY must
|
||
be 20 bytes long. Returns 0 on sucess or an error code. */
|
||
gpg_error_t
|
||
keygrip_from_pk (PKT_public_key *pk, unsigned char *array)
|
||
{
|
||
gpg_error_t err;
|
||
gcry_sexp_t s_pkey;
|
||
|
||
if (DBG_PACKET)
|
||
log_debug ("get_keygrip for public key\n");
|
||
|
||
switch (pk->pubkey_algo)
|
||
{
|
||
case GCRY_PK_DSA:
|
||
err = gcry_sexp_build (&s_pkey, NULL,
|
||
"(public-key(dsa(p%m)(q%m)(g%m)(y%m)))",
|
||
pk->pkey[0], pk->pkey[1],
|
||
pk->pkey[2], pk->pkey[3]);
|
||
break;
|
||
|
||
case GCRY_PK_ELG:
|
||
case GCRY_PK_ELG_E:
|
||
err = gcry_sexp_build (&s_pkey, NULL,
|
||
"(public-key(elg(p%m)(g%m)(y%m)))",
|
||
pk->pkey[0], pk->pkey[1], pk->pkey[2]);
|
||
break;
|
||
|
||
case GCRY_PK_RSA:
|
||
case GCRY_PK_RSA_S:
|
||
case GCRY_PK_RSA_E:
|
||
err = gcry_sexp_build (&s_pkey, NULL,
|
||
"(public-key(rsa(n%m)(e%m)))",
|
||
pk->pkey[0], pk->pkey[1]);
|
||
break;
|
||
|
||
case PUBKEY_ALGO_EDDSA:
|
||
case PUBKEY_ALGO_ECDSA:
|
||
case PUBKEY_ALGO_ECDH:
|
||
{
|
||
char *curve = openpgp_oid_to_str (pk->pkey[0]);
|
||
if (!curve)
|
||
err = gpg_error_from_syserror ();
|
||
else
|
||
{
|
||
err = gcry_sexp_build (&s_pkey, NULL,
|
||
pk->pubkey_algo == PUBKEY_ALGO_EDDSA?
|
||
"(public-key(ecc(curve%s)(flags eddsa)(q%m)))":
|
||
(pk->pubkey_algo == PUBKEY_ALGO_ECDH
|
||
&& openpgp_oid_is_crv25519 (pk->pkey[0]))?
|
||
"(public-key(ecc(curve%s)(flags djb-tweak)(q%m)))":
|
||
"(public-key(ecc(curve%s)(q%m)))",
|
||
curve, pk->pkey[1]);
|
||
xfree (curve);
|
||
}
|
||
}
|
||
break;
|
||
|
||
default:
|
||
err = gpg_error (GPG_ERR_PUBKEY_ALGO);
|
||
break;
|
||
}
|
||
|
||
if (err)
|
||
return err;
|
||
|
||
if (!gcry_pk_get_keygrip (s_pkey, array))
|
||
{
|
||
log_info ("error computing keygrip\n");
|
||
memset (array, 0, 20);
|
||
err = gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
else
|
||
{
|
||
if (DBG_PACKET)
|
||
log_printhex ("keygrip=", array, 20);
|
||
/* FIXME: Save the keygrip in PK. */
|
||
}
|
||
gcry_sexp_release (s_pkey);
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Store an allocated buffer with the keygrip of PK encoded as a
|
||
hexstring at r_GRIP. Returns 0 on success. */
|
||
gpg_error_t
|
||
hexkeygrip_from_pk (PKT_public_key *pk, char **r_grip)
|
||
{
|
||
gpg_error_t err;
|
||
unsigned char grip[20];
|
||
|
||
*r_grip = NULL;
|
||
err = keygrip_from_pk (pk, grip);
|
||
if (!err)
|
||
{
|
||
char * buf = xtrymalloc (20*2+1);
|
||
if (!buf)
|
||
err = gpg_error_from_syserror ();
|
||
else
|
||
{
|
||
bin2hex (grip, 20, buf);
|
||
*r_grip = buf;
|
||
}
|
||
}
|
||
return err;
|
||
}
|