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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"
void
release_skc_list( SKC_LIST skc_list )
{
SKC_LIST skc_rover;
for( ; skc_list; skc_list = skc_rover ) {
skc_rover = skc_list->next;
free_secret_cert( skc_list->skc );
m_free( skc_list );
}
}
int
build_skc_list( STRLIST locusr, SKC_LIST *ret_skc_list, int unlock,
unsigned usage )
{
SKC_LIST skc_list = NULL;
int rc;
if( !locusr ) { /* use the default one */
PKT_secret_cert *skc;
skc = m_alloc_clear( sizeof *skc );
if( (rc = get_seckey_byname( skc, NULL, unlock )) ) {
free_secret_cert( skc ); skc = NULL;
log_error("no default secret key: %s\n", g10_errstr(rc) );
}
else if( !(rc=check_pubkey_algo2(skc->pubkey_algo, usage)) ) {
SKC_LIST r;
if( skc->version == 4 && (usage & 1)
&& skc->pubkey_algo == PUBKEY_ALGO_ELGAMAL_E ) {
log_error("this is a PGP generated "
"ElGamal key which is NOT secure for signatures!\n");
free_secret_cert( skc ); skc = NULL;
}
else {
r = m_alloc( sizeof *r );
r->skc = skc; skc = NULL;
r->next = skc_list;
r->mark = 0;
skc_list = r;
}
}
else {
free_secret_cert( skc ); skc = NULL;
log_error("invalid default secret key: %s\n", g10_errstr(rc) );
}
}
else {
for(; locusr; locusr = locusr->next ) {
PKT_secret_cert *skc;
skc = m_alloc_clear( sizeof *skc );
if( (rc = get_seckey_byname( skc, locusr->d, unlock )) ) {
free_secret_cert( skc ); skc = NULL;
log_error("skipped '%s': %s\n", locusr->d, g10_errstr(rc) );
}
else if( !(rc=check_pubkey_algo2(skc->pubkey_algo, usage)) ) {
SKC_LIST r;
if( skc->version == 4 && (usage & 1)
&& skc->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_cert( skc ); skc = NULL;
}
else {
r = m_alloc( sizeof *r );
r->skc = skc; skc = NULL;
r->next = skc_list;
r->mark = 0;
skc_list = r;
}
}
else {
free_secret_cert( skc ); skc = NULL;
log_error("skipped '%s': %s\n", locusr->d, g10_errstr(rc) );
}
}
}
if( !rc && !skc_list ) {
log_error("no valid signators\n");
rc = G10ERR_NO_USER_ID;
}
if( rc )
release_skc_list( skc_list );
else
*ret_skc_list = skc_list;
return rc;
}
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