This commit was manufactured by cvs2svn to create branch

'GNUPG-1-9-BRANCH'.

1 files changed, 518 insertions, 0 deletions

diff --git a/g10/keyid.c b/g10/keyid.c
new file mode 100644
index 000000000..09f24e8ea
--- /dev/null
+++ b/g10/keyid.c
@@ -0,0 +1,518 @@
+/* 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 '?';
+    }
+}
+
+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];
+}
+
+byte *
+namehash_from_uid(PKT_user_id *uid)
+{
+  if(uid->namehash==NULL)
+    {
+      uid->namehash=m_alloc(20);
+
+      if(uid->attrib_data)
+	rmd160_hash_buffer(uid->namehash,uid->attrib_data,uid->attrib_len);
+      else
+	rmd160_hash_buffer(uid->namehash,uid->name,uid->len);
+    }
+
+  return uid->namehash;
+}
+
+/****************
+ * 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 *
+expirestr_from_sig( PKT_signature *sig )
+{
+    static char buffer[11+5];
+    time_t atime;
+
+    if(!sig->expiredate)
+      return _("never     ");
+    atime=sig->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);
+}
+
+const char *
+colon_expirestr_from_sig (PKT_signature *sig)
+{
+    if(!sig->expiredate)
+        return "";
+    if (opt.fixed_list_mode) {
+        static char buf[15];
+        sprintf (buf, "%lu", (ulong)sig->expiredate);
+        return buf;
+    }
+    return expirestr_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[0], &n, NULL );
+	    md_write( md, p, n );
+	    m_free(buf);
+	    p = buf = mpi_get_buffer( sk->skey[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_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;
+}
+
+
+