mirror of
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198 lines
5.1 KiB
C
198 lines
5.1 KiB
C
/* skclist.c
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* Copyright (C) 1998, 1999, 2000, 2001 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 2 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, 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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#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 <assert.h>
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#include "options.h"
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#include "packet.h"
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#include "errors.h"
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#include "keydb.h"
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#include "memory.h"
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#include "util.h"
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#include "i18n.h"
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#include "cipher.h"
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void
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release_sk_list( SK_LIST sk_list )
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{
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SK_LIST sk_rover;
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for( ; sk_list; sk_list = sk_rover ) {
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sk_rover = sk_list->next;
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free_secret_key( sk_list->sk );
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m_free( sk_list );
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}
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}
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/* Check that we are only using keys which don't have
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* the string "(insecure!)" or "not secure" or "do not use"
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* in one of the user ids
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*/
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static int
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is_insecure( PKT_secret_key *sk )
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{
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return 0; /* FIXME!! */
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}
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static int
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key_present_in_sk_list(SK_LIST sk_list, PKT_secret_key *sk)
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{
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for (; sk_list; sk_list = sk_list->next) {
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if ( !cmp_secret_keys(sk_list->sk, sk) )
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return 0;
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}
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return -1;
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}
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static int
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is_duplicated_entry (STRLIST list, STRLIST item)
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{
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for(; list && list != item; list = list->next) {
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if ( !strcmp (list->d, item->d) )
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return 1;
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}
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return 0;
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}
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int
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build_sk_list( STRLIST locusr, SK_LIST *ret_sk_list, int unlock,
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unsigned use )
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{
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SK_LIST sk_list = NULL;
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int rc;
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if( !locusr ) { /* use the default one */
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PKT_secret_key *sk;
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sk = m_alloc_clear( sizeof *sk );
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sk->req_usage = use;
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if( (rc = get_seckey_byname( sk, NULL, unlock )) ) {
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free_secret_key( sk ); sk = NULL;
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log_error("no default secret key: %s\n", g10_errstr(rc) );
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}
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else if( !(rc=check_pubkey_algo2(sk->pubkey_algo, use)) ) {
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SK_LIST r;
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if( sk->version == 4 && (use & PUBKEY_USAGE_SIG)
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&& sk->pubkey_algo == PUBKEY_ALGO_ELGAMAL_E ) {
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log_info("this is a PGP generated "
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"ElGamal key which is NOT secure for signatures!\n");
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free_secret_key( sk ); sk = NULL;
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}
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else if( random_is_faked() && !is_insecure( sk ) ) {
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log_info(_("key is not flagged as insecure - "
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"can't use it with the faked RNG!\n"));
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free_secret_key( sk ); sk = NULL;
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}
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else {
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r = m_alloc( sizeof *r );
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r->sk = sk; sk = NULL;
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r->next = sk_list;
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r->mark = 0;
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sk_list = r;
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}
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}
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else {
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free_secret_key( sk ); sk = NULL;
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log_error("invalid default secret key: %s\n", g10_errstr(rc) );
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}
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}
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else {
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STRLIST locusr_orig = locusr;
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for(; locusr; locusr = locusr->next ) {
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PKT_secret_key *sk;
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rc = 0;
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/* Do an early check agains duplicated entries. However this
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* won't catch all duplicates because the user IDs may be
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* specified in different ways.
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*/
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if ( is_duplicated_entry ( locusr_orig, locusr ) ) {
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log_error(_("skipped `%s': duplicated\n"), locusr->d );
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continue;
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}
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sk = m_alloc_clear( sizeof *sk );
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sk->req_usage = use;
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if( (rc = get_seckey_byname( sk, locusr->d, 0 )) ) {
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free_secret_key( sk ); sk = NULL;
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log_error(_("skipped `%s': %s\n"), locusr->d, g10_errstr(rc) );
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}
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else if ( key_present_in_sk_list(sk_list, sk) == 0) {
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free_secret_key(sk); sk = NULL;
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log_info(_("skipped: secret key already present\n"));
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}
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else if ( unlock && (rc = check_secret_key( sk, 0 )) ) {
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free_secret_key( sk ); sk = NULL;
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log_error(_("skipped `%s': %s\n"), locusr->d, g10_errstr(rc) );
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}
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else if( !(rc=check_pubkey_algo2(sk->pubkey_algo, use)) ) {
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SK_LIST r;
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if( sk->version == 4 && (use & PUBKEY_USAGE_SIG)
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&& sk->pubkey_algo == PUBKEY_ALGO_ELGAMAL_E ) {
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log_info(_("skipped `%s': this is a PGP generated "
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"ElGamal key which is not secure for signatures!\n"),
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locusr->d );
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free_secret_key( sk ); sk = NULL;
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}
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else if( random_is_faked() && !is_insecure( sk ) ) {
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log_info(_("key is not flagged as insecure - "
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"can't use it with the faked RNG!\n"));
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free_secret_key( sk ); sk = NULL;
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}
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else {
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r = m_alloc( sizeof *r );
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r->sk = sk; sk = NULL;
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r->next = sk_list;
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r->mark = 0;
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sk_list = r;
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}
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}
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else {
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free_secret_key( sk ); sk = NULL;
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log_error("skipped `%s': %s\n", locusr->d, g10_errstr(rc) );
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}
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}
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}
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if( !rc && !sk_list ) {
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log_error("no valid signators\n");
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rc = G10ERR_NO_USER_ID;
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}
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if( rc )
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release_sk_list( sk_list );
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else
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*ret_sk_list = sk_list;
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return rc;
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}
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