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skclist.c
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skclist.c
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/* skclist.c
* Copyright (C) 1998 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include "options.h"
#include "packet.h"
#include "errors.h"
#include "keydb.h"
#include "memory.h"
#include "util.h"
#include "i18n.h"
#include "cipher.h"
void
release_sk_list( SK_LIST sk_list )
{
SK_LIST sk_rover;
for( ; sk_list; sk_list = sk_rover ) {
sk_rover = sk_list->next;
free_secret_key( sk_list->sk );
m_free( sk_list );
}
}
/* Check that we are only using keys which don't have
* the string "(insecure!)" or "not secure" or "do not use"
* in one of the user ids
*/
static int
is_insecure( PKT_secret_key *sk )
{
return 0; /* FIXME!! */
}
int
build_sk_list( STRLIST locusr, SK_LIST *ret_sk_list, int unlock,
unsigned use )
{
SK_LIST sk_list = NULL;
int rc;
if( !locusr ) { /* use the default one */
PKT_secret_key *sk;
sk = m_alloc_clear( sizeof *sk );
sk->pubkey_usage = use;
if( (rc = get_seckey_byname( sk, NULL, unlock )) ) {
free_secret_key( sk ); sk = NULL;
log_error("no default secret key: %s\n", g10_errstr(rc) );
}
else if( !(rc=check_pubkey_algo2(sk->pubkey_algo, use)) ) {
SK_LIST r;
if( sk->version == 4 && (use & PUBKEY_USAGE_SIG)
&& sk->pubkey_algo == PUBKEY_ALGO_ELGAMAL_E ) {
log_info("this is a PGP generated "
"ElGamal key which is NOT secure for signatures!\n");
free_secret_key( sk ); sk = NULL;
}
else if( random_is_faked() && !is_insecure( sk ) ) {
log_info(_("key is not flagged as insecure - "
"can't use it with the faked RNG!\n"));
free_secret_key( sk ); sk = NULL;
}
else {
r = m_alloc( sizeof *r );
r->sk = sk; sk = NULL;
r->next = sk_list;
r->mark = 0;
sk_list = r;
}
}
else {
free_secret_key( sk ); sk = NULL;
log_error("invalid default secret key: %s\n", g10_errstr(rc) );
}
}
else {
for(; locusr; locusr = locusr->next ) {
PKT_secret_key *sk;
sk = m_alloc_clear( sizeof *sk );
sk->pubkey_usage = use;
if( (rc = get_seckey_byname( sk, locusr->d, unlock )) ) {
free_secret_key( sk ); sk = NULL;
log_error(_("skipped `%s': %s\n"), locusr->d, g10_errstr(rc) );
}
else if( !(rc=check_pubkey_algo2(sk->pubkey_algo, use)) ) {
SK_LIST r;
if( sk->version == 4 && (use & PUBKEY_USAGE_SIG)
&& sk->pubkey_algo == PUBKEY_ALGO_ELGAMAL_E ) {
log_info(_("skipped `%s': this is a PGP generated "
"ElGamal key which is not secure for signatures!\n"),
locusr->d );
free_secret_key( sk ); sk = NULL;
}
else if( random_is_faked() && !is_insecure( sk ) ) {
log_info(_("key is not flagged as insecure - "
"can't use it with the faked RNG!\n"));
free_secret_key( sk ); sk = NULL;
}
else {
r = m_alloc( sizeof *r );
r->sk = sk; sk = NULL;
r->next = sk_list;
r->mark = 0;
sk_list = r;
}
}
else {
free_secret_key( sk ); sk = NULL;
log_error("skipped `%s': %s\n", locusr->d, g10_errstr(rc) );
}
}
}
if( !rc && !sk_list ) {
log_error("no valid signators\n");
rc = G10ERR_NO_USER_ID;
}
if( rc )
release_sk_list( sk_list );
else
*ret_sk_list = sk_list;
return rc;
}

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