mirror of
git://git.gnupg.org/gnupg.git
synced 2024-11-04 20:38:50 +01:00
492 lines
11 KiB
C
492 lines
11 KiB
C
/* keyid.c - key ID and fingerprint handling
|
|
* Copyright (C) 1998, 1999, 2000, 2001 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 <time.h>
|
|
#include <assert.h>
|
|
#include "util.h"
|
|
#include "main.h"
|
|
#include "packet.h"
|
|
#include "options.h"
|
|
#include "mpi.h"
|
|
#include "keydb.h"
|
|
#include "i18n.h"
|
|
|
|
|
|
int
|
|
pubkey_letter( int algo )
|
|
{
|
|
switch( algo ) {
|
|
case PUBKEY_ALGO_RSA: return 'R' ;
|
|
case PUBKEY_ALGO_RSA_E: return 'r' ;
|
|
case PUBKEY_ALGO_RSA_S: return 's' ;
|
|
case PUBKEY_ALGO_ELGAMAL_E: return 'g';
|
|
case PUBKEY_ALGO_ELGAMAL: return 'G' ;
|
|
case PUBKEY_ALGO_DSA: return 'D' ;
|
|
default: return '?';
|
|
}
|
|
}
|
|
|
|
int
|
|
get_lsign_letter ( PKT_signature *sig )
|
|
{
|
|
const char *p;
|
|
|
|
if (!sig)
|
|
return '?';
|
|
p = parse_sig_subpkt2( sig, SIGSUBPKT_EXPORTABLE, NULL );
|
|
return (p && !*p)? 'l':'x';
|
|
}
|
|
|
|
|
|
static MD_HANDLE
|
|
do_fingerprint_md( PKT_public_key *pk )
|
|
{
|
|
MD_HANDLE md;
|
|
unsigned n;
|
|
unsigned nb[PUBKEY_MAX_NPKEY];
|
|
unsigned nn[PUBKEY_MAX_NPKEY];
|
|
byte *pp[PUBKEY_MAX_NPKEY];
|
|
int i;
|
|
int npkey = pubkey_get_npkey( pk->pubkey_algo );
|
|
|
|
md = md_open( pk->version < 4 ? DIGEST_ALGO_RMD160 : DIGEST_ALGO_SHA1, 0);
|
|
n = pk->version < 4 ? 8 : 6;
|
|
for(i=0; i < npkey; i++ ) {
|
|
nb[i] = mpi_get_nbits(pk->pkey[i]);
|
|
pp[i] = mpi_get_buffer( pk->pkey[i], nn+i, NULL );
|
|
n += 2 + nn[i];
|
|
}
|
|
|
|
md_putc( md, 0x99 ); /* ctb */
|
|
md_putc( md, n >> 8 ); /* 2 byte length header */
|
|
md_putc( md, n );
|
|
if( pk->version < 4 )
|
|
md_putc( md, 3 );
|
|
else
|
|
md_putc( md, 4 );
|
|
|
|
{ u32 a = pk->timestamp;
|
|
md_putc( md, a >> 24 );
|
|
md_putc( md, a >> 16 );
|
|
md_putc( md, a >> 8 );
|
|
md_putc( md, a );
|
|
}
|
|
if( pk->version < 4 ) {
|
|
u16 a;
|
|
|
|
if( pk->expiredate )
|
|
a = (u16)((pk->expiredate - pk->timestamp) / 86400L);
|
|
else
|
|
a = 0;
|
|
md_putc( md, a >> 8 );
|
|
md_putc( md, a );
|
|
}
|
|
md_putc( md, pk->pubkey_algo );
|
|
for(i=0; i < npkey; i++ ) {
|
|
md_putc( md, nb[i]>>8);
|
|
md_putc( md, nb[i] );
|
|
md_write( md, pp[i], nn[i] );
|
|
m_free(pp[i]);
|
|
}
|
|
md_final( md );
|
|
|
|
return md;
|
|
}
|
|
|
|
static MD_HANDLE
|
|
do_fingerprint_md_sk( PKT_secret_key *sk )
|
|
{
|
|
PKT_public_key pk;
|
|
int npkey = pubkey_get_npkey( sk->pubkey_algo ); /* npkey is correct! */
|
|
int i;
|
|
|
|
pk.pubkey_algo = sk->pubkey_algo;
|
|
pk.version = sk->version;
|
|
pk.timestamp = sk->timestamp;
|
|
pk.expiredate = sk->expiredate;
|
|
pk.pubkey_algo = sk->pubkey_algo;
|
|
for( i=0; i < npkey; i++ )
|
|
pk.pkey[i] = sk->skey[i];
|
|
return do_fingerprint_md( &pk );
|
|
}
|
|
|
|
|
|
/****************
|
|
* Get the keyid from the secret key and put it into keyid
|
|
* if this is not NULL. Return the 32 low bits of the keyid.
|
|
*/
|
|
u32
|
|
keyid_from_sk( PKT_secret_key *sk, u32 *keyid )
|
|
{
|
|
u32 lowbits;
|
|
u32 dummy_keyid[2];
|
|
|
|
if( !keyid )
|
|
keyid = dummy_keyid;
|
|
|
|
if( sk->version < 4 && is_RSA(sk->pubkey_algo) ) {
|
|
lowbits = pubkey_get_npkey(sk->pubkey_algo) ?
|
|
mpi_get_keyid( sk->skey[0], keyid ) : 0; /* take n */
|
|
}
|
|
else {
|
|
const byte *dp;
|
|
MD_HANDLE md;
|
|
md = do_fingerprint_md_sk(sk);
|
|
dp = md_read( md, 0 );
|
|
keyid[0] = dp[12] << 24 | dp[13] << 16 | dp[14] << 8 | dp[15] ;
|
|
keyid[1] = dp[16] << 24 | dp[17] << 16 | dp[18] << 8 | dp[19] ;
|
|
lowbits = keyid[1];
|
|
md_close(md);
|
|
}
|
|
|
|
return lowbits;
|
|
}
|
|
|
|
|
|
/****************
|
|
* Get the keyid from the public key and put it into keyid
|
|
* if this is not NULL. Return the 32 low bits of the keyid.
|
|
*/
|
|
u32
|
|
keyid_from_pk( PKT_public_key *pk, u32 *keyid )
|
|
{
|
|
u32 lowbits;
|
|
u32 dummy_keyid[2];
|
|
|
|
if( !keyid )
|
|
keyid = dummy_keyid;
|
|
|
|
if( pk->keyid[0] || pk->keyid[1] ) {
|
|
keyid[0] = pk->keyid[0];
|
|
keyid[1] = pk->keyid[1];
|
|
lowbits = keyid[1];
|
|
}
|
|
else if( pk->version < 4 && is_RSA(pk->pubkey_algo) ) {
|
|
lowbits = pubkey_get_npkey(pk->pubkey_algo) ?
|
|
mpi_get_keyid( pk->pkey[0], keyid ) : 0 ; /* from n */
|
|
pk->keyid[0] = keyid[0];
|
|
pk->keyid[1] = keyid[1];
|
|
}
|
|
else {
|
|
const byte *dp;
|
|
MD_HANDLE md;
|
|
md = do_fingerprint_md(pk);
|
|
dp = md_read( md, 0 );
|
|
keyid[0] = dp[12] << 24 | dp[13] << 16 | dp[14] << 8 | dp[15] ;
|
|
keyid[1] = dp[16] << 24 | dp[17] << 16 | dp[18] << 8 | dp[19] ;
|
|
lowbits = keyid[1];
|
|
md_close(md);
|
|
pk->keyid[0] = keyid[0];
|
|
pk->keyid[1] = keyid[1];
|
|
}
|
|
|
|
return lowbits;
|
|
}
|
|
|
|
|
|
/****************
|
|
* Get the keyid from the fingerprint. This function is simple for most
|
|
* keys, but has to do a keylookup for old stayle keys.
|
|
*/
|
|
u32
|
|
keyid_from_fingerprint( const byte *fprint, size_t fprint_len, u32 *keyid )
|
|
{
|
|
u32 dummy_keyid[2];
|
|
|
|
if( !keyid )
|
|
keyid = dummy_keyid;
|
|
|
|
if( fprint_len != 20 ) {
|
|
/* This is special as we have to lookup the key first */
|
|
PKT_public_key pk;
|
|
int rc;
|
|
|
|
memset( &pk, 0, sizeof pk );
|
|
rc = get_pubkey_byfprint( &pk, fprint, fprint_len );
|
|
if( rc ) {
|
|
log_error("Oops: keyid_from_fingerprint: no pubkey\n");
|
|
keyid[0] = 0;
|
|
keyid[1] = 0;
|
|
}
|
|
else
|
|
keyid_from_pk( &pk, keyid );
|
|
}
|
|
else {
|
|
const byte *dp = fprint;
|
|
keyid[0] = dp[12] << 24 | dp[13] << 16 | dp[14] << 8 | dp[15] ;
|
|
keyid[1] = dp[16] << 24 | dp[17] << 16 | dp[18] << 8 | dp[19] ;
|
|
}
|
|
|
|
return keyid[1];
|
|
}
|
|
|
|
|
|
u32
|
|
keyid_from_sig( PKT_signature *sig, u32 *keyid )
|
|
{
|
|
if( keyid ) {
|
|
keyid[0] = sig->keyid[0];
|
|
keyid[1] = sig->keyid[1];
|
|
}
|
|
return sig->keyid[1];
|
|
}
|
|
|
|
/****************
|
|
* return the number of bits used in the pk
|
|
*/
|
|
unsigned
|
|
nbits_from_pk( PKT_public_key *pk )
|
|
{
|
|
return pubkey_nbits( pk->pubkey_algo, pk->pkey );
|
|
}
|
|
|
|
/****************
|
|
* return the number of bits used in the sk
|
|
*/
|
|
unsigned
|
|
nbits_from_sk( PKT_secret_key *sk )
|
|
{
|
|
return pubkey_nbits( sk->pubkey_algo, sk->skey );
|
|
}
|
|
|
|
static const char *
|
|
mk_datestr (char *buffer, time_t atime)
|
|
{
|
|
struct tm *tp;
|
|
|
|
if ( atime < 0 ) /* 32 bit time_t and after 2038-01-19 */
|
|
strcpy (buffer, "????" "-??" "-??"); /* mark this as invalid */
|
|
else {
|
|
tp = gmtime (&atime);
|
|
sprintf (buffer,"%04d-%02d-%02d",
|
|
1900+tp->tm_year, tp->tm_mon+1, tp->tm_mday );
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
/****************
|
|
* return a string with the creation date of the pk
|
|
* Note: this is alloced in a static buffer.
|
|
* Format is: yyyy-mm-dd
|
|
*/
|
|
const char *
|
|
datestr_from_pk( PKT_public_key *pk )
|
|
{
|
|
static char buffer[11+5];
|
|
time_t atime = pk->timestamp;
|
|
|
|
return mk_datestr (buffer, atime);
|
|
}
|
|
|
|
const char *
|
|
datestr_from_sk( PKT_secret_key *sk )
|
|
{
|
|
static char buffer[11+5];
|
|
time_t atime = sk->timestamp;
|
|
|
|
return mk_datestr (buffer, atime);
|
|
}
|
|
|
|
const char *
|
|
datestr_from_sig( PKT_signature *sig )
|
|
{
|
|
static char buffer[11+5];
|
|
time_t atime = sig->timestamp;
|
|
|
|
return mk_datestr (buffer, atime);
|
|
}
|
|
|
|
|
|
const char *
|
|
expirestr_from_pk( PKT_public_key *pk )
|
|
{
|
|
static char buffer[11+5];
|
|
time_t atime;
|
|
|
|
if( !pk->expiredate )
|
|
return _("never ");
|
|
atime = pk->expiredate;
|
|
return mk_datestr (buffer, atime);
|
|
}
|
|
|
|
const char *
|
|
expirestr_from_sk( PKT_secret_key *sk )
|
|
{
|
|
static char buffer[11+5];
|
|
time_t atime;
|
|
|
|
if( !sk->expiredate )
|
|
return "never ";
|
|
atime = sk->expiredate;
|
|
return mk_datestr (buffer, atime);
|
|
}
|
|
|
|
const char *
|
|
colon_strtime (u32 t)
|
|
{
|
|
if (!t)
|
|
return "";
|
|
if (opt.fixed_list_mode) {
|
|
static char buf[15];
|
|
sprintf (buf, "%lu", (ulong)t);
|
|
return buf;
|
|
}
|
|
return strtimestamp(t);
|
|
}
|
|
|
|
const char *
|
|
colon_datestr_from_pk (PKT_public_key *pk)
|
|
{
|
|
if (opt.fixed_list_mode) {
|
|
static char buf[15];
|
|
sprintf (buf, "%lu", (ulong)pk->timestamp);
|
|
return buf;
|
|
}
|
|
return datestr_from_pk (pk);
|
|
}
|
|
|
|
const char *
|
|
colon_datestr_from_sk (PKT_secret_key *sk)
|
|
{
|
|
if (opt.fixed_list_mode) {
|
|
static char buf[15];
|
|
sprintf (buf, "%lu", (ulong)sk->timestamp);
|
|
return buf;
|
|
}
|
|
return datestr_from_sk (sk);
|
|
}
|
|
|
|
const char *
|
|
colon_datestr_from_sig (PKT_signature *sig)
|
|
{
|
|
if (opt.fixed_list_mode) {
|
|
static char buf[15];
|
|
sprintf (buf, "%lu", (ulong)sig->timestamp);
|
|
return buf;
|
|
}
|
|
return datestr_from_sig (sig);
|
|
}
|
|
|
|
|
|
|
|
/**************** .
|
|
* Return a byte array with the fingerprint for the given PK/SK
|
|
* The length of the array is returned in ret_len. Caller must free
|
|
* the array or provide an array of length MAX_FINGERPRINT_LEN.
|
|
*/
|
|
|
|
byte *
|
|
fingerprint_from_pk( PKT_public_key *pk, byte *array, size_t *ret_len )
|
|
{
|
|
byte *p, *buf;
|
|
const byte *dp;
|
|
size_t len;
|
|
unsigned int n;
|
|
|
|
if( pk->version < 4 && is_RSA(pk->pubkey_algo) ) {
|
|
/* RSA in version 3 packets is special */
|
|
MD_HANDLE md;
|
|
|
|
md = md_open( DIGEST_ALGO_MD5, 0);
|
|
if( pubkey_get_npkey( pk->pubkey_algo ) > 1 ) {
|
|
p = buf = mpi_get_buffer( pk->pkey[0], &n, NULL );
|
|
md_write( md, p, n );
|
|
m_free(buf);
|
|
p = buf = mpi_get_buffer( pk->pkey[1], &n, NULL );
|
|
md_write( md, p, n );
|
|
m_free(buf);
|
|
}
|
|
md_final(md);
|
|
if( !array )
|
|
array = m_alloc( 16 );
|
|
len = 16;
|
|
memcpy(array, md_read(md, DIGEST_ALGO_MD5), 16 );
|
|
md_close(md);
|
|
}
|
|
else {
|
|
MD_HANDLE md;
|
|
md = do_fingerprint_md(pk);
|
|
dp = md_read( md, 0 );
|
|
len = md_digest_length( md_get_algo( md ) );
|
|
assert( len <= MAX_FINGERPRINT_LEN );
|
|
if( !array )
|
|
array = m_alloc( len );
|
|
memcpy(array, dp, len );
|
|
pk->keyid[0] = dp[12] << 24 | dp[13] << 16 | dp[14] << 8 | dp[15] ;
|
|
pk->keyid[1] = dp[16] << 24 | dp[17] << 16 | dp[18] << 8 | dp[19] ;
|
|
md_close(md);
|
|
}
|
|
|
|
*ret_len = len;
|
|
return array;
|
|
}
|
|
|
|
byte *
|
|
fingerprint_from_sk( PKT_secret_key *sk, byte *array, size_t *ret_len )
|
|
{
|
|
byte *p, *buf;
|
|
const char *dp;
|
|
size_t len;
|
|
unsigned n;
|
|
|
|
if( sk->version < 4 && is_RSA(sk->pubkey_algo) ) {
|
|
/* RSA in version 3 packets is special */
|
|
MD_HANDLE md;
|
|
|
|
md = md_open( DIGEST_ALGO_MD5, 0);
|
|
if( pubkey_get_npkey( sk->pubkey_algo ) > 1 ) {
|
|
p = buf = mpi_get_buffer( sk->skey[1], &n, NULL );
|
|
md_write( md, p, n );
|
|
m_free(buf);
|
|
p = buf = mpi_get_buffer( sk->skey[0], &n, NULL );
|
|
md_write( md, p, n );
|
|
m_free(buf);
|
|
}
|
|
md_final(md);
|
|
if( !array )
|
|
array = m_alloc( 16 );
|
|
len = 16;
|
|
memcpy(array, md_read(md, DIGEST_ALGO_MD5), 16 );
|
|
md_close(md);
|
|
}
|
|
else {
|
|
MD_HANDLE md;
|
|
md = do_fingerprint_md_sk(sk);
|
|
dp = md_read( md, 0 );
|
|
len = md_digest_length( md_get_algo( md ) );
|
|
assert( len <= MAX_FINGERPRINT_LEN );
|
|
if( !array )
|
|
array = m_alloc( len );
|
|
memcpy(array, dp, len );
|
|
md_close(md);
|
|
}
|
|
|
|
*ret_len = len;
|
|
return array;
|
|
}
|
|
|
|
|
|
|