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135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/* skclist.c
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* Copyright (C) 1998, 1999, 2000 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 <gcrypt.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 "util.h"
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#include "i18n.h"
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#include "main.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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gcry_free( sk_list );
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}
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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 = gcry_xcalloc( 1, sizeof *sk );
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sk->pubkey_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", gpg_errstr(rc) );
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}
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else if( !(rc=openpgp_pk_test_algo(sk->pubkey_algo, use)) ) {
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SK_LIST r;
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if( sk->version == 4 && (use & GCRY_PK_USAGE_SIGN )
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&& sk->pubkey_algo == GCRY_PK_ELG_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 {
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r = gcry_xmalloc( 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", gpg_errstr(rc) );
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}
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}
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else {
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for(; locusr; locusr = locusr->next ) {
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PKT_secret_key *sk;
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sk = gcry_xcalloc( 1, sizeof *sk );
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sk->pubkey_usage = use;
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if( (rc = get_seckey_byname( sk, locusr->d, unlock )) ) {
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free_secret_key( sk ); sk = NULL;
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log_error(_("skipped `%s': %s\n"), locusr->d, gpg_errstr(rc) );
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}
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else if( !(rc=openpgp_pk_test_algo(sk->pubkey_algo, use)) ) {
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SK_LIST r;
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if( sk->version == 4 && (use & GCRY_PK_USAGE_SIGN)
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&& sk->pubkey_algo == GCRY_PK_ELG_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 {
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r = gcry_xmalloc( 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, gpg_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 = GPGERR_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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