mirror of git://git.gnupg.org/gnupg.git
402 lines
9.8 KiB
C
402 lines
9.8 KiB
C
/* free-packet.c - cleanup stuff for packets
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* Copyright (C) 1998 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 <assert.h>
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#include "packet.h"
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#include "iobuf.h"
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#include "mpi.h"
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#include "util.h"
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#include "cipher.h"
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#include "memory.h"
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void
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free_pubkey_enc( PKT_pubkey_enc *enc )
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{
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if( enc->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
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mpi_free( enc->d.elg.a );
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mpi_free( enc->d.elg.b );
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}
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else if( enc->pubkey_algo == PUBKEY_ALGO_RSA )
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mpi_free( enc->d.rsa.rsa_integer );
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m_free(enc);
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}
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void
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free_seckey_enc( PKT_signature *sig )
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{
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if( sig->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
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mpi_free( sig->d.elg.a );
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mpi_free( sig->d.elg.b );
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}
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else if( sig->pubkey_algo == PUBKEY_ALGO_DSA ) {
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mpi_free( sig->d.dsa.r );
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mpi_free( sig->d.dsa.s );
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}
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else if( sig->pubkey_algo == PUBKEY_ALGO_RSA )
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mpi_free( sig->d.rsa.rsa_integer );
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m_free(sig->hashed_data);
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m_free(sig->unhashed_data);
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m_free(sig);
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}
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/****************
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* Return the digest algorithm from the signature packet.
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* We need this function because the digest algo depends on the
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* used pubkey algorithm.
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*/
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int
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digest_algo_from_sig( PKT_signature *sig )
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{
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#if 0 /* not used anymore */
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switch( sig->pubkey_algo ) {
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case PUBKEY_ALGO_ELGAMAL: return sig->d.elg.digest_algo;
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case PUBKEY_ALGO_DSA: return sig->d.dsa.digest_algo;
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case PUBKEY_ALGO_RSA: return sig->d.rsa.digest_algo;
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default: return 0;
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}
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#endif
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return sig->digest_algo;
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}
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void
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release_public_cert_parts( PKT_public_cert *cert )
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{
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if( cert->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
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mpi_free( cert->d.elg.p ); cert->d.elg.p = NULL;
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mpi_free( cert->d.elg.g ); cert->d.elg.g = NULL;
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mpi_free( cert->d.elg.y ); cert->d.elg.y = NULL;
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}
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else if( cert->pubkey_algo == PUBKEY_ALGO_DSA ) {
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mpi_free( cert->d.dsa.p ); cert->d.dsa.p = NULL;
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mpi_free( cert->d.dsa.q ); cert->d.dsa.q = NULL;
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mpi_free( cert->d.dsa.g ); cert->d.dsa.g = NULL;
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mpi_free( cert->d.dsa.y ); cert->d.dsa.y = NULL;
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}
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else if( cert->pubkey_algo == PUBKEY_ALGO_RSA ) {
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mpi_free( cert->d.rsa.n ); cert->d.rsa.n = NULL;
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mpi_free( cert->d.rsa.e ); cert->d.rsa.e = NULL;
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}
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}
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void
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free_public_cert( PKT_public_cert *cert )
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{
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release_public_cert_parts( cert );
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m_free(cert);
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}
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PKT_public_cert *
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copy_public_cert( PKT_public_cert *d, PKT_public_cert *s )
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{
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if( !d )
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d = m_alloc(sizeof *d);
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memcpy( d, s, sizeof *d );
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if( s->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
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d->d.elg.p = mpi_copy( s->d.elg.p );
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d->d.elg.g = mpi_copy( s->d.elg.g );
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d->d.elg.y = mpi_copy( s->d.elg.y );
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}
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else if( s->pubkey_algo == PUBKEY_ALGO_DSA ) {
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d->d.dsa.p = mpi_copy( s->d.dsa.p );
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d->d.dsa.q = mpi_copy( s->d.dsa.q );
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d->d.dsa.g = mpi_copy( s->d.dsa.g );
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d->d.dsa.y = mpi_copy( s->d.dsa.y );
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}
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else if( s->pubkey_algo == PUBKEY_ALGO_RSA ) {
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d->d.rsa.n = mpi_copy( s->d.rsa.n );
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d->d.rsa.e = mpi_copy( s->d.rsa.e );
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}
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return d;
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}
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void
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release_secret_cert_parts( PKT_secret_cert *cert )
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{
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if( cert->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
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mpi_free( cert->d.elg.p ); cert->d.elg.p = NULL;
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mpi_free( cert->d.elg.g ); cert->d.elg.g = NULL;
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mpi_free( cert->d.elg.y ); cert->d.elg.y = NULL;
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mpi_free( cert->d.elg.x ); cert->d.elg.x = NULL;
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}
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else if( cert->pubkey_algo == PUBKEY_ALGO_DSA ) {
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mpi_free( cert->d.dsa.p ); cert->d.dsa.p = NULL;
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mpi_free( cert->d.dsa.q ); cert->d.dsa.q = NULL;
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mpi_free( cert->d.dsa.g ); cert->d.dsa.g = NULL;
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mpi_free( cert->d.dsa.y ); cert->d.dsa.y = NULL;
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mpi_free( cert->d.dsa.x ); cert->d.dsa.x = NULL;
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}
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else if( cert->pubkey_algo == PUBKEY_ALGO_RSA ) {
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mpi_free( cert->d.rsa.n ); cert->d.rsa.n = NULL;
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mpi_free( cert->d.rsa.e ); cert->d.rsa.e = NULL;
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mpi_free( cert->d.rsa.d ); cert->d.rsa.d = NULL;
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mpi_free( cert->d.rsa.p ); cert->d.rsa.p = NULL;
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mpi_free( cert->d.rsa.q ); cert->d.rsa.q = NULL;
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mpi_free( cert->d.rsa.u ); cert->d.rsa.u = NULL;
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}
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}
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void
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free_secret_cert( PKT_secret_cert *cert )
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{
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release_secret_cert_parts( cert );
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m_free(cert);
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}
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PKT_secret_cert *
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copy_secret_cert( PKT_secret_cert *d, PKT_secret_cert *s )
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{
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if( !d )
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d = m_alloc(sizeof *d);
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memcpy( d, s, sizeof *d );
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if( s->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
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d->d.elg.p = mpi_copy( s->d.elg.p );
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d->d.elg.g = mpi_copy( s->d.elg.g );
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d->d.elg.y = mpi_copy( s->d.elg.y );
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d->d.elg.x = mpi_copy( s->d.elg.x );
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}
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else if( s->pubkey_algo == PUBKEY_ALGO_DSA ) {
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d->d.dsa.p = mpi_copy( s->d.dsa.p );
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d->d.dsa.q = mpi_copy( s->d.dsa.q );
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d->d.dsa.g = mpi_copy( s->d.dsa.g );
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d->d.dsa.y = mpi_copy( s->d.dsa.y );
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d->d.dsa.x = mpi_copy( s->d.dsa.x );
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}
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else if( s->pubkey_algo == PUBKEY_ALGO_RSA ) {
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d->d.rsa.n = mpi_copy( s->d.rsa.n );
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d->d.rsa.e = mpi_copy( s->d.rsa.e );
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d->d.rsa.d = mpi_copy( s->d.rsa.d );
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d->d.rsa.p = mpi_copy( s->d.rsa.p );
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d->d.rsa.q = mpi_copy( s->d.rsa.q );
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d->d.rsa.u = mpi_copy( s->d.rsa.u );
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}
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return d;
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}
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void
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free_comment( PKT_comment *rem )
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{
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m_free(rem);
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}
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void
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free_user_id( PKT_user_id *uid )
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{
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m_free(uid);
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}
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void
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free_compressed( PKT_compressed *zd )
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{
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if( zd->buf ) { /* have to skip some bytes */
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/* don't have any information about the length, so
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* we assume this is the last packet */
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while( iobuf_get(zd->buf) != -1 )
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;
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}
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m_free(zd);
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}
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void
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free_encrypted( PKT_encrypted *ed )
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{
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if( ed->buf ) { /* have to skip some bytes */
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if( iobuf_in_block_mode(ed->buf) ) {
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while( iobuf_get(ed->buf) != -1 )
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;
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iobuf_set_block_mode(ed->buf, 0);
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}
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else {
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for( ; ed->len; ed->len-- ) /* skip the packet */
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iobuf_get(ed->buf);
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}
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}
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m_free(ed);
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}
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void
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free_plaintext( PKT_plaintext *pt )
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{
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if( pt->buf ) { /* have to skip some bytes */
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if( iobuf_in_block_mode(pt->buf) ) {
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while( iobuf_get(pt->buf) != -1 )
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;
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iobuf_set_block_mode(pt->buf, 0);
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}
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else {
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for( ; pt->len; pt->len-- ) /* skip the packet */
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iobuf_get(pt->buf);
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}
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}
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m_free(pt);
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}
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/****************
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* Free the packet in pkt.
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*/
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void
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free_packet( PACKET *pkt )
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{
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if( !pkt || !pkt->pkt.generic )
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return;
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if( DBG_MEMORY )
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log_debug("free_packet() type=%d\n", pkt->pkttype );
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switch( pkt->pkttype ) {
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case PKT_SIGNATURE:
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free_seckey_enc( pkt->pkt.signature );
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break;
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case PKT_PUBKEY_ENC:
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free_pubkey_enc( pkt->pkt.pubkey_enc );
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break;
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case PKT_PUBLIC_CERT:
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free_public_cert( pkt->pkt.public_cert );
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break;
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case PKT_SECRET_CERT:
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free_secret_cert( pkt->pkt.secret_cert );
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break;
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case PKT_COMMENT:
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free_comment( pkt->pkt.comment );
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break;
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case PKT_USER_ID:
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free_user_id( pkt->pkt.user_id );
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break;
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case PKT_COMPRESSED:
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free_compressed( pkt->pkt.compressed);
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break;
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case PKT_ENCRYPTED:
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free_encrypted( pkt->pkt.encrypted );
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break;
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case PKT_PLAINTEXT:
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free_plaintext( pkt->pkt.plaintext );
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break;
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default:
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m_free( pkt->pkt.generic );
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break;
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}
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pkt->pkt.generic = NULL;
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}
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/****************
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* Returns 0 if they match.
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*/
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int
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cmp_public_certs( PKT_public_cert *a, PKT_public_cert *b )
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{
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if( a->timestamp != b->timestamp )
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return -1;
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if( a->valid_days != b->valid_days )
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return -1;
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if( a->pubkey_algo != b->pubkey_algo )
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return -1;
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if( a->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
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if( mpi_cmp( a->d.elg.p , b->d.elg.p ) )
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return -1;
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if( mpi_cmp( a->d.elg.g , b->d.elg.g ) )
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return -1;
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if( mpi_cmp( a->d.elg.y , b->d.elg.y ) )
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return -1;
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}
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else if( a->pubkey_algo == PUBKEY_ALGO_DSA ) {
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if( mpi_cmp( a->d.dsa.p , b->d.dsa.p ) )
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return -1;
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if( mpi_cmp( a->d.dsa.q , b->d.dsa.q ) )
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return -1;
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if( mpi_cmp( a->d.dsa.g , b->d.dsa.g ) )
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return -1;
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if( mpi_cmp( a->d.dsa.y , b->d.dsa.y ) )
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return -1;
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}
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else if( a->pubkey_algo == PUBKEY_ALGO_RSA ) {
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if( mpi_cmp( a->d.rsa.n , b->d.rsa.n ) )
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return -1;
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if( mpi_cmp( a->d.rsa.e , b->d.rsa.e ) )
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return -1;
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}
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return 0;
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}
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/****************
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* Returns 0 if they match.
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*/
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int
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cmp_public_secret_cert( PKT_public_cert *pkc, PKT_secret_cert *skc )
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{
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if( pkc->timestamp != skc->timestamp )
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return -1;
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if( pkc->valid_days != skc->valid_days )
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return -1;
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if( pkc->pubkey_algo != skc->pubkey_algo )
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return -1;
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if( pkc->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
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if( mpi_cmp( pkc->d.elg.p , skc->d.elg.p ) )
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return -1;
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if( mpi_cmp( pkc->d.elg.g , skc->d.elg.g ) )
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return -1;
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if( mpi_cmp( pkc->d.elg.y , skc->d.elg.y ) )
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return -1;
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}
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else if( pkc->pubkey_algo == PUBKEY_ALGO_DSA ) {
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if( mpi_cmp( pkc->d.dsa.p , skc->d.dsa.p ) )
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return -1;
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if( mpi_cmp( pkc->d.dsa.q , skc->d.dsa.q ) )
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return -1;
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if( mpi_cmp( pkc->d.dsa.g , skc->d.dsa.g ) )
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return -1;
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if( mpi_cmp( pkc->d.dsa.y , skc->d.dsa.y ) )
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return -1;
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}
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else if( pkc->pubkey_algo == PUBKEY_ALGO_RSA ) {
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if( mpi_cmp( pkc->d.rsa.n , skc->d.rsa.n ) )
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return -1;
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if( mpi_cmp( pkc->d.rsa.e , skc->d.rsa.e ) )
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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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cmp_user_ids( PKT_user_id *a, PKT_user_id *b )
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{
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int res;
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res = a->len - b->len;
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if( !res )
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res = memcmp( a->name, b->name, a->len );
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return res;
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}
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