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/* keycache-openpgp.c - OpenPGP code for the key cache |
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* Copyright (C) 2001, 2002, 2003, 2005 Timo Schulz |
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* |
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* This file is part of MyGPGME. |
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* |
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* MyGPGME 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 2 of the License, or |
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* (at your option) any later version. |
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* |
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* MyGPGME 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, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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*/ |
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|
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#include <stdio.h> |
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#include <sys/types.h> |
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#include <string.h> |
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#include <malloc.h> |
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|
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#include "gpgme-config.h" |
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#ifdef WITH_OPENPGP |
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#include "gpgme.h" |
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#include "key.h" |
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#include "util.h" |
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#include "ops.h" |
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#include "openpgp.h" |
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|
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|
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static void |
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buffer_to_string (char * dst, size_t dlen, const byte *buf, size_t nbytes) |
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{ |
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char dig[3]; |
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size_t i; |
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|
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memset( dst, 0, dlen ); |
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for( i = 0; i < nbytes && dlen > 0; i++ ) { |
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sprintf( dig, "%02X", buf[i] ); |
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strcat( dst, dig ); |
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dlen -= 2; |
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} |
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} /* buffer_to_string */ |
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|
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|
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static void |
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parse_secring (gpgme_keycache_t cache, const char *kid, const char *secring) |
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{ |
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PACKET *pkt = calloc (1, sizeof * pkt); |
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PKT_secret_key *sk; |
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gpg_iobuf_t inp; |
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gpgme_error_t err; |
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gpgme_key_t key; |
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struct keycache_s *c=NULL; |
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char keyid[16+1]; |
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|
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inp = gpg_iobuf_open (secring); |
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if (!inp) { |
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safe_free (pkt); |
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return; |
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} |
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gpg_iobuf_ioctl (inp, 3, 1, NULL); |
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gpg_init_packet (pkt); |
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while (gpg_parse_packet (inp, pkt) != -1) { |
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if (pkt->pkttype == PKT_SECRET_KEY) { |
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sk = pkt->pkt.secret_key; |
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_snprintf (keyid, sizeof keyid-1, "%08lX", |
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gpg_keyid_from_sk (sk, NULL)); |
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if (kid && strcmp (kid, keyid) != 0) |
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goto next; |
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err = _gpgme_keycache_find_key2 (cache, keyid, 0, &key, &c); |
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/*DEBUG2 ("parse_secring: keyid=%s %p\r\n", keyid, c);*/ |
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if (!err) { |
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key->gloflags.is_protected = sk->is_protected; |
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key->gloflags.divert_to_card = sk->protect.s2k.mode==1002? 1 : 0; |
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if (c->pubpart != NULL) { |
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c->pubpart->gloflags.is_protected = sk->is_protected; |
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c->pubpart->gloflags.divert_to_card = sk->protect.s2k.mode==1002? 1 : 0; |
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/*DEBUG1 ("parse_secring: sync %s\r\n", keyid);*/ |
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} |
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} |
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} |
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next: |
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gpg_free_packet (pkt); |
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gpg_init_packet (pkt); |
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} |
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safe_free (pkt); |
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gpg_iobuf_close (inp); |
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} /* parse_secring */ |
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|
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|
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gpgme_error_t |
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keycache_prepare2 (gpgme_keycache_t ctx, const char *kid, |
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const char *pubring, const char *secring) |
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{ |
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gpgme_error_t err; |
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gpgme_key_t key = NULL; |
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gpg_iobuf_t inp; |
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PACKET *pkt = calloc (1, sizeof * pkt); |
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struct revoker_key_s *r; |
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const byte *sym_prefs; |
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char keyid[16+1], *id = NULL; |
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int key_seen = 0; |
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size_t nbytes = 0, nsym =0; |
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|
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if (secring) { |
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parse_secring (ctx, kid, secring); |
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if (!pubring) { |
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safe_free(pkt); |
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return 0; |
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} |
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} |
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inp = gpg_iobuf_open( pubring ); |
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if( !inp ) { |
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safe_free( pkt ); |
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return mk_error( File_Error ); |
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} |
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gpg_iobuf_ioctl( inp, 3, 1, NULL ); /* disable cache */ |
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|
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gpg_init_packet( pkt ); |
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while (gpg_parse_packet (inp, pkt) != -1) { |
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if (pkt->pkttype == PKT_PUBLIC_KEY) { |
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strcpy (keyid, ""); |
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key_seen = 1; |
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} |
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|
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if( pkt->pkttype == PKT_SIGNATURE && pkt->pkt.signature->sig_class == 0x1F ) { |
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if (pkt->pkt.signature->numrevkeys == 0) |
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goto next; |
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nbytes = pkt->pkt.signature->numrevkeys; |
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_snprintf (keyid, sizeof keyid -1, "%08X", pkt->pkt.signature->keyid[1]); |
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if (kid && strcmp (kid, keyid) != 0) |
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goto next; |
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err = gpgme_keycache_find_key (ctx, keyid, 0, &key); |
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if (err) |
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goto next; |
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while( nbytes-- ) { |
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PKT_signature *sig = pkt->pkt.signature; |
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r = calloc( 1, sizeof *r ); |
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if (!r) { |
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err = mk_error (Out_Of_Core); |
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goto fail; |
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} |
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r->algo = sig->revkey[nbytes]->algid; |
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buffer_to_string( r->fpr, sizeof r->fpr-1, sig->revkey[nbytes]->fpr, 20 ); |
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r->next = key->rvks; |
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key->rvks = r; |
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} |
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} |
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if( pkt->pkttype == PKT_SIGNATURE && key_seen == 1 ) { |
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if( (sym_prefs=gpg_parse_sig_subpkt( pkt->pkt.signature->hashed, |
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SIGSUBPKT_PREF_SYM, &nsym )) == NULL) |
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goto next; |
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_snprintf (keyid, sizeof keyid - 1, "%08X", pkt->pkt.signature->keyid[1]); |
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if (kid && strcmp (kid, keyid) != 0) |
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goto next; |
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err = gpgme_keycache_find_key (ctx, keyid, 0, &key); |
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if (err) |
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goto next; |
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else if (nsym) { |
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key->sym_prefs = calloc (1, nsym+1); |
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if (!key->sym_prefs) |
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return mk_error (Out_Of_Core); |
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memcpy (key->sym_prefs, sym_prefs, nsym); |
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} |
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} |
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if (pkt->pkttype == PKT_USER_ID) { |
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safe_free (id); |
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id = strdup (pkt->pkt.user_id->name); |
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if (!id) { |
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err = mk_error (Out_Of_Core); |
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goto fail; |
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} |
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} |
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if( (pkt->pkttype == PKT_USER_ID || pkt->pkttype == PKT_ATTRIBUTE) |
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&& pkt->pkt.user_id->attrib_data && key ) { |
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PKT_user_id *id = pkt->pkt.user_id; |
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key->attrib.used = 1; |
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key->attrib.len = id->attrib_len; |
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key->attrib.d = malloc (id->attrib_len + 1); |
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if( !key->attrib.d ) { |
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err = mk_error( Out_Of_Core ); |
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goto fail; |
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} |
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memcpy (key->attrib.d, id->attrib_data, id->attrib_len); |
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key = NULL; |
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} |
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next: |
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gpg_free_packet (pkt); |
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gpg_init_packet(pkt); |
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} |
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|
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fail: |
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safe_free (id); |
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safe_free (pkt); |
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gpg_iobuf_close (inp); |
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return err; |
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} /* gpgme_keycache_prepare */ |
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|
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|
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gpgme_error_t |
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gpgme_keycache_prepare (gpgme_keycache_t ctx, const char *pubr, const char *secr) |
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{ |
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return keycache_prepare2 (ctx, NULL, pubr, secr); |
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} |
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|
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gpgme_error_t |
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gpgme_keycache_prepare_single (gpgme_keycache_t ctx, const char *keyid, |
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const char *pubr, const char *secr) |
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{ |
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if (!strncmp (keyid, "0x", 2)) |
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keyid += 2; |
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DEBUG1 ("keycache_prepare_single: %s\r\n", keyid); |
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return keycache_prepare2 (ctx, keyid, pubr, secr); |
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} |
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#endif /*WITH_OPENPGP*/ |
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