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-rw-r--r--g10/keyid.c753
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diff --git a/g10/keyid.c b/g10/keyid.c
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--- /dev/null
+++ b/g10/keyid.c
@@ -0,0 +1,753 @@
+/* keyid.c - key ID and fingerprint handling
+ * Copyright (C) 1998, 1999, 2000, 2001, 2003,
+ * 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * 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 '?';
+ }
+}
+
+/* This function is useful for v4 fingerprints and v3 or v4 key
+ signing. */
+void
+hash_public_key( MD_HANDLE md, PKT_public_key *pk )
+{
+ unsigned n=6;
+ 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 );
+
+ /* Two extra bytes for the expiration date in v3 */
+ if(pk->version<4)
+ n+=2;
+
+ if(npkey==0 && pk->pkey[0] && mpi_is_opaque(pk->pkey[0]))
+ {
+ pp[0]=mpi_get_opaque(pk->pkey[0],&nn[0]);
+ n+=nn[0];
+ }
+ else
+ 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 */
+ /* What does it mean if n is greater than than 0xFFFF ? */
+ md_putc( md, n >> 8 ); /* 2 byte length header */
+ md_putc( md, n );
+ md_putc( md, pk->version );
+
+ md_putc( md, pk->timestamp >> 24 );
+ md_putc( md, pk->timestamp >> 16 );
+ md_putc( md, pk->timestamp >> 8 );
+ md_putc( md, pk->timestamp );
+
+ if(pk->version<4)
+ {
+ u16 days=0;
+ if(pk->expiredate)
+ days=(u16)((pk->expiredate - pk->timestamp) / 86400L);
+
+ md_putc( md, days >> 8 );
+ md_putc( md, days );
+ }
+
+ md_putc( md, pk->pubkey_algo );
+
+ if(npkey==0 && pk->pkey[0] && mpi_is_opaque(pk->pkey[0]))
+ md_write(md,pp[0],nn[0]);
+ else
+ for(i=0; i < npkey; i++ )
+ {
+ md_putc( md, nb[i]>>8);
+ md_putc( md, nb[i] );
+ md_write( md, pp[i], nn[i] );
+ xfree(pp[i]);
+ }
+}
+
+static MD_HANDLE
+do_fingerprint_md( PKT_public_key *pk )
+{
+ MD_HANDLE md;
+
+ md = md_open( DIGEST_ALGO_SHA1, 0);
+ hash_public_key(md,pk);
+ 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;
+
+ if(npkey==0)
+ return NULL;
+
+ 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 );
+}
+
+size_t
+keystrlen(void)
+{
+ switch(opt.keyid_format)
+ {
+ case KF_SHORT:
+ return 8;
+
+ case KF_LONG:
+ return 16;
+
+ case KF_0xSHORT:
+ return 10;
+
+ case KF_0xLONG:
+ return 18;
+
+ default:
+ BUG();
+ }
+}
+
+const char *
+keystr(u32 *keyid)
+{
+ static char keyid_str[19];
+
+ switch(opt.keyid_format)
+ {
+ case KF_SHORT:
+ sprintf(keyid_str,"%08lX",(ulong)keyid[1]);
+ break;
+
+ case KF_LONG:
+ if(keyid[0])
+ sprintf(keyid_str,"%08lX%08lX",(ulong)keyid[0],(ulong)keyid[1]);
+ else
+ sprintf(keyid_str,"%08lX",(ulong)keyid[1]);
+ break;
+
+ case KF_0xSHORT:
+ sprintf(keyid_str,"0x%08lX",(ulong)keyid[1]);
+ break;
+
+ case KF_0xLONG:
+ if(keyid[0])
+ sprintf(keyid_str,"0x%08lX%08lX",(ulong)keyid[0],(ulong)keyid[1]);
+ else
+ sprintf(keyid_str,"0x%08lX",(ulong)keyid[1]);
+ break;
+
+ default:
+ BUG();
+ }
+
+ return keyid_str;
+}
+
+const char *
+keystr_from_pk(PKT_public_key *pk)
+{
+ keyid_from_pk(pk,NULL);
+
+ return keystr(pk->keyid);
+}
+
+const char *
+keystr_from_sk(PKT_secret_key *sk)
+{
+ keyid_from_sk(sk,NULL);
+
+ return keystr(sk->keyid);
+}
+
+const char *
+keystr_from_desc(KEYDB_SEARCH_DESC *desc)
+{
+ switch(desc->mode)
+ {
+ case KEYDB_SEARCH_MODE_LONG_KID:
+ case KEYDB_SEARCH_MODE_SHORT_KID:
+ return keystr(desc->u.kid);
+
+ case KEYDB_SEARCH_MODE_FPR20:
+ {
+ u32 keyid[2];
+
+ keyid[0] = (unsigned char)desc->u.fpr[12] << 24
+ | (unsigned char)desc->u.fpr[13] << 16
+ | (unsigned char)desc->u.fpr[14] << 8
+ | (unsigned char)desc->u.fpr[15] ;
+ keyid[1] = (unsigned char)desc->u.fpr[16] << 24
+ | (unsigned char)desc->u.fpr[17] << 16
+ | (unsigned char)desc->u.fpr[18] << 8
+ | (unsigned char)desc->u.fpr[19] ;
+
+ return keystr(keyid);
+ }
+
+ case KEYDB_SEARCH_MODE_FPR16:
+ return "?v3 fpr?";
+
+ default:
+ BUG();
+ }
+}
+
+/****************
+ * 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->keyid[0] || sk->keyid[1] )
+ {
+ keyid[0] = sk->keyid[0];
+ keyid[1] = sk->keyid[1];
+ lowbits = keyid[1];
+ }
+ else if( sk->version < 4 )
+ {
+ if( is_RSA(sk->pubkey_algo) )
+ {
+ lowbits = pubkey_get_npkey(sk->pubkey_algo) ?
+ mpi_get_keyid( sk->skey[0], keyid ) : 0; /* take n */
+ sk->keyid[0]=keyid[0];
+ sk->keyid[1]=keyid[1];
+ }
+ else
+ sk->keyid[0]=sk->keyid[1]=keyid[0]=keyid[1]=lowbits=0xFFFFFFFF;
+ }
+ else
+ {
+ const byte *dp;
+ MD_HANDLE md;
+ md = do_fingerprint_md_sk(sk);
+ if(md)
+ {
+ 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);
+ sk->keyid[0] = keyid[0];
+ sk->keyid[1] = keyid[1];
+ }
+ else
+ sk->keyid[0]=sk->keyid[1]=keyid[0]=keyid[1]=lowbits=0xFFFFFFFF;
+ }
+
+ 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 )
+ {
+ if( 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
+ pk->keyid[0]=pk->keyid[1]=keyid[0]=keyid[1]=lowbits=0xFFFFFFFF;
+ }
+ else
+ {
+ const byte *dp;
+ MD_HANDLE md;
+ md = do_fingerprint_md(pk);
+ if(md)
+ {
+ 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];
+ }
+ else
+ pk->keyid[0]=pk->keyid[1]=keyid[0]=keyid[1]=lowbits=0xFFFFFFFF;
+ }
+
+ 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=xmalloc(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 *
+revokestr_from_pk( PKT_public_key *pk )
+{
+ static char buffer[11+5];
+ time_t atime;
+
+ if(!pk->revoked.date)
+ return _("never ");
+ atime=pk->revoked.date;
+ return mk_datestr (buffer, atime);
+}
+
+
+const char *
+usagestr_from_pk( PKT_public_key *pk )
+{
+ static char buffer[10];
+ int i = 0;
+ unsigned int use = pk->pubkey_usage;
+
+ if ( use & PUBKEY_USAGE_SIG )
+ buffer[i++] = 'S';
+
+ if ( use & PUBKEY_USAGE_CERT )
+ buffer[i++] = 'C';
+
+ if ( use & PUBKEY_USAGE_ENC )
+ buffer[i++] = 'E';
+
+ if ( (use & PUBKEY_USAGE_AUTH) )
+ buffer[i++] = 'A';
+
+ while (i < 4)
+ buffer[i++] = ' ';
+
+ buffer[i] = 0;
+ return buffer;
+}
+
+
+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 )
+ {
+ if( 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 );
+ xfree(buf);
+ p = buf = mpi_get_buffer( pk->pkey[1], &n, NULL );
+ md_write( md, p, n );
+ xfree(buf);
+ }
+ md_final(md);
+ if( !array )
+ array = xmalloc( 16 );
+ len = 16;
+ memcpy(array, md_read(md, DIGEST_ALGO_MD5), 16 );
+ md_close(md);
+ }
+ else
+ {
+ if(!array)
+ array=xmalloc(16);
+ len=16;
+ memset(array,0,16);
+ }
+ }
+ 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 = xmalloc( 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 )
+ {
+ if( 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 );
+ xfree(buf);
+ p = buf = mpi_get_buffer( sk->skey[1], &n, NULL );
+ md_write( md, p, n );
+ xfree(buf);
+ }
+ md_final(md);
+ if( !array )
+ array = xmalloc( 16 );
+ len = 16;
+ memcpy(array, md_read(md, DIGEST_ALGO_MD5), 16 );
+ md_close(md);
+ }
+ else
+ {
+ if(!array)
+ array=xmalloc(16);
+ len=16;
+ memset(array,0,16);
+ }
+ }
+ else {
+ MD_HANDLE md;
+ md = do_fingerprint_md_sk(sk);
+ if(md)
+ {
+ dp = md_read( md, 0 );
+ len = md_digest_length( md_get_algo( md ) );
+ assert( len <= MAX_FINGERPRINT_LEN );
+ if( !array )
+ array = xmalloc( len );
+ memcpy(array, dp, len );
+ md_close(md);
+ }
+ else
+ {
+ len=MAX_FINGERPRINT_LEN;
+ if(!array)
+ array=xmalloc(len);
+ memset(array,0,len);
+ }
+ }
+
+ *ret_len = len;
+ return array;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 12:13:58 +0000