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diff --git a/g10/getkey.c b/g10/getkey.c
index 5440c29d7..3c953d61e 100644
--- a/g10/getkey.c
+++ b/g10/getkey.c
@@ -1,3096 +1,3102 @@
/* getkey.c - Get a key from the database
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
* 2006 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include "util.h"
#include "packet.h"
#include "memory.h"
#include "iobuf.h"
#include "keydb.h"
#include "options.h"
#include "main.h"
#include "trustdb.h"
#include "i18n.h"
#include "keyserver-internal.h"
#define MAX_PK_CACHE_ENTRIES PK_UID_CACHE_SIZE
#define MAX_UID_CACHE_ENTRIES PK_UID_CACHE_SIZE
#if MAX_PK_CACHE_ENTRIES < 2
#error We need the cache for key creation
#endif
struct getkey_ctx_s {
int exact;
KBNODE keyblock;
KBPOS kbpos;
KBNODE found_key; /* pointer into some keyblock */
int last_rc;
int req_usage;
int req_algo;
KEYDB_HANDLE kr_handle;
int not_allocated;
int nitems;
KEYDB_SEARCH_DESC items[1];
};
#if 0
static struct {
int any;
int okay_count;
int nokey_count;
int error_count;
} lkup_stats[21];
#endif
typedef struct keyid_list {
struct keyid_list *next;
u32 keyid[2];
} *keyid_list_t;
#if MAX_PK_CACHE_ENTRIES
typedef struct pk_cache_entry {
struct pk_cache_entry *next;
u32 keyid[2];
PKT_public_key *pk;
} *pk_cache_entry_t;
static pk_cache_entry_t pk_cache;
static int pk_cache_entries; /* number of entries in pk cache */
static int pk_cache_disabled;
#endif
#if MAX_UID_CACHE_ENTRIES < 5
#error we really need the userid cache
#endif
typedef struct user_id_db {
struct user_id_db *next;
keyid_list_t keyids;
int len;
char name[1];
} *user_id_db_t;
static user_id_db_t user_id_db;
static int uid_cache_entries; /* number of entries in uid cache */
static void merge_selfsigs( KBNODE keyblock );
static int lookup( GETKEY_CTX ctx, KBNODE *ret_keyblock, int secmode );
#if 0
static void
print_stats()
{
int i;
for(i=0; i < DIM(lkup_stats); i++ ) {
if( lkup_stats[i].any )
fprintf(stderr,
"lookup stats: mode=%-2d ok=%-6d nokey=%-6d err=%-6d\n",
i,
lkup_stats[i].okay_count,
lkup_stats[i].nokey_count,
lkup_stats[i].error_count );
}
}
#endif
void
cache_public_key( PKT_public_key *pk )
{
#if MAX_PK_CACHE_ENTRIES
pk_cache_entry_t ce;
u32 keyid[2];
if( pk_cache_disabled )
return;
if( pk->dont_cache )
return;
if( is_ELGAMAL(pk->pubkey_algo)
|| pk->pubkey_algo == PUBKEY_ALGO_DSA
|| is_RSA(pk->pubkey_algo) ) {
keyid_from_pk( pk, keyid );
}
else
return; /* don't know how to get the keyid */
for( ce = pk_cache; ce; ce = ce->next )
if( ce->keyid[0] == keyid[0] && ce->keyid[1] == keyid[1] ) {
if( DBG_CACHE )
log_debug("cache_public_key: already in cache\n");
return;
}
if( pk_cache_entries >= MAX_PK_CACHE_ENTRIES ) {
/* fixme: use another algorithm to free some cache slots */
pk_cache_disabled=1;
if( opt.verbose > 1 )
log_info(_("too many entries in pk cache - disabled\n"));
return;
}
pk_cache_entries++;
ce = xmalloc( sizeof *ce );
ce->next = pk_cache;
pk_cache = ce;
ce->pk = copy_public_key( NULL, pk );
ce->keyid[0] = keyid[0];
ce->keyid[1] = keyid[1];
#endif
}
/* Return a const utf-8 string with the text "[User ID not found]".
This fucntion is required so that we don't need to switch gettext's
encoding temporary. */
static const char *
user_id_not_found_utf8 (void)
{
static char *text;
if (!text)
text = native_to_utf8 (_("[User ID not found]"));
return text;
}
/*
* Return the user ID from the given keyblock.
* We use the primary uid flag which has been set by the merge_selfsigs
* function. The returned value is only valid as long as then given
* keyblock is not changed
*/
static const char *
get_primary_uid ( KBNODE keyblock, size_t *uidlen )
{
KBNODE k;
const char *s;
for (k=keyblock; k; k=k->next ) {
if ( k->pkt->pkttype == PKT_USER_ID
&& !k->pkt->pkt.user_id->attrib_data
&& k->pkt->pkt.user_id->is_primary ) {
*uidlen = k->pkt->pkt.user_id->len;
return k->pkt->pkt.user_id->name;
}
}
s = user_id_not_found_utf8 ();
*uidlen = strlen (s);
return s;
}
static void
release_keyid_list ( keyid_list_t k )
{
while ( k ) {
keyid_list_t k2 = k->next;
xfree (k);
k = k2;
}
}
/****************
* Store the association of keyid and userid
* Feed only public keys to this function.
*/
static void
cache_user_id( KBNODE keyblock )
{
user_id_db_t r;
const char *uid;
size_t uidlen;
keyid_list_t keyids = NULL;
KBNODE k;
for (k=keyblock; k; k = k->next ) {
if ( k->pkt->pkttype == PKT_PUBLIC_KEY
|| k->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
keyid_list_t a = xmalloc_clear ( sizeof *a );
/* Hmmm: For a long list of keyids it might be an advantage
* to append the keys */
keyid_from_pk( k->pkt->pkt.public_key, a->keyid );
/* first check for duplicates */
for(r=user_id_db; r; r = r->next ) {
keyid_list_t b = r->keyids;
for ( b = r->keyids; b; b = b->next ) {
if( b->keyid[0] == a->keyid[0]
&& b->keyid[1] == a->keyid[1] ) {
if( DBG_CACHE )
log_debug("cache_user_id: already in cache\n");
release_keyid_list ( keyids );
xfree ( a );
return;
}
}
}
/* now put it into the cache */
a->next = keyids;
keyids = a;
}
}
if ( !keyids )
BUG (); /* No key no fun */
uid = get_primary_uid ( keyblock, &uidlen );
if( uid_cache_entries >= MAX_UID_CACHE_ENTRIES ) {
/* fixme: use another algorithm to free some cache slots */
r = user_id_db;
user_id_db = r->next;
release_keyid_list ( r->keyids );
xfree(r);
uid_cache_entries--;
}
r = xmalloc( sizeof *r + uidlen-1 );
r->keyids = keyids;
r->len = uidlen;
memcpy(r->name, uid, r->len);
r->next = user_id_db;
user_id_db = r;
uid_cache_entries++;
}
void
getkey_disable_caches()
{
#if MAX_PK_CACHE_ENTRIES
{
pk_cache_entry_t ce, ce2;
for( ce = pk_cache; ce; ce = ce2 ) {
ce2 = ce->next;
free_public_key( ce->pk );
xfree( ce );
}
pk_cache_disabled=1;
pk_cache_entries = 0;
pk_cache = NULL;
}
#endif
/* fixme: disable user id cache ? */
}
static void
pk_from_block ( GETKEY_CTX ctx, PKT_public_key *pk, KBNODE keyblock )
{
KBNODE a = ctx->found_key ? ctx->found_key : keyblock;
assert ( a->pkt->pkttype == PKT_PUBLIC_KEY
|| a->pkt->pkttype == PKT_PUBLIC_SUBKEY );
copy_public_key ( pk, a->pkt->pkt.public_key );
}
static void
sk_from_block ( GETKEY_CTX ctx,
PKT_secret_key *sk, KBNODE keyblock )
{
KBNODE a = ctx->found_key ? ctx->found_key : keyblock;
assert ( a->pkt->pkttype == PKT_SECRET_KEY
|| a->pkt->pkttype == PKT_SECRET_SUBKEY );
copy_secret_key( sk, a->pkt->pkt.secret_key);
}
/****************
* Get a public key and store it into the allocated pk
* can be called with PK set to NULL to just read it into some
* internal structures.
*/
int
get_pubkey( PKT_public_key *pk, u32 *keyid )
{
int internal = 0;
int rc = 0;
#if MAX_PK_CACHE_ENTRIES
if(pk)
{
/* Try to get it from the cache. We don't do this when pk is
NULL as it does not guarantee that the user IDs are
cached. */
pk_cache_entry_t ce;
for( ce = pk_cache; ce; ce = ce->next )
{
if( ce->keyid[0] == keyid[0] && ce->keyid[1] == keyid[1] )
{
copy_public_key( pk, ce->pk );
return 0;
}
}
}
#endif
/* more init stuff */
if( !pk ) {
pk = xmalloc_clear( sizeof *pk );
internal++;
}
/* do a lookup */
{ struct getkey_ctx_s ctx;
KBNODE kb = NULL;
memset( &ctx, 0, sizeof ctx );
ctx.exact = 1; /* use the key ID exactly as given */
ctx.not_allocated = 1;
ctx.kr_handle = keydb_new (0);
ctx.nitems = 1;
ctx.items[0].mode = KEYDB_SEARCH_MODE_LONG_KID;
ctx.items[0].u.kid[0] = keyid[0];
ctx.items[0].u.kid[1] = keyid[1];
ctx.req_algo = pk->req_algo;
ctx.req_usage = pk->req_usage;
rc = lookup( &ctx, &kb, 0 );
if ( !rc ) {
pk_from_block ( &ctx, pk, kb );
}
get_pubkey_end( &ctx );
release_kbnode ( kb );
}
if( !rc )
goto leave;
rc = G10ERR_NO_PUBKEY;
leave:
if( !rc )
cache_public_key( pk );
if( internal )
free_public_key(pk);
return rc;
}
/* Get a public key and store it into the allocated pk. This function
differs from get_pubkey() in that it does not do a check of the key
to avoid recursion. It should be used only in very certain cases.
It will only retrieve primary keys. */
int
get_pubkey_fast (PKT_public_key *pk, u32 *keyid)
{
int rc = 0;
KEYDB_HANDLE hd;
KBNODE keyblock;
u32 pkid[2];
assert (pk);
#if MAX_PK_CACHE_ENTRIES
{ /* Try to get it from the cache */
pk_cache_entry_t ce;
for (ce = pk_cache; ce; ce = ce->next)
{
if (ce->keyid[0] == keyid[0] && ce->keyid[1] == keyid[1])
{
if (pk)
copy_public_key (pk, ce->pk);
return 0;
}
}
}
#endif
hd = keydb_new (0);
rc = keydb_search_kid (hd, keyid);
if (rc == -1)
{
keydb_release (hd);
return G10ERR_NO_PUBKEY;
}
rc = keydb_get_keyblock (hd, &keyblock);
keydb_release (hd);
if (rc)
{
log_error ("keydb_get_keyblock failed: %s\n", g10_errstr(rc));
return G10ERR_NO_PUBKEY;
}
assert ( keyblock->pkt->pkttype == PKT_PUBLIC_KEY
|| keyblock->pkt->pkttype == PKT_PUBLIC_SUBKEY );
keyid_from_pk(keyblock->pkt->pkt.public_key,pkid);
if(keyid[0]==pkid[0] && keyid[1]==pkid[1])
copy_public_key (pk, keyblock->pkt->pkt.public_key );
else
rc=G10ERR_NO_PUBKEY;
release_kbnode (keyblock);
/* Not caching key here since it won't have all of the fields
properly set. */
return rc;
}
KBNODE
get_pubkeyblock( u32 *keyid )
{
struct getkey_ctx_s ctx;
int rc = 0;
KBNODE keyblock = NULL;
memset( &ctx, 0, sizeof ctx );
/* no need to set exact here because we want the entire block */
ctx.not_allocated = 1;
ctx.kr_handle = keydb_new (0);
ctx.nitems = 1;
ctx.items[0].mode = KEYDB_SEARCH_MODE_LONG_KID;
ctx.items[0].u.kid[0] = keyid[0];
ctx.items[0].u.kid[1] = keyid[1];
rc = lookup( &ctx, &keyblock, 0 );
get_pubkey_end( &ctx );
return rc ? NULL : keyblock;
}
/****************
* Get a secret key and store it into sk
*/
int
get_seckey( PKT_secret_key *sk, u32 *keyid )
{
int rc;
struct getkey_ctx_s ctx;
KBNODE kb = NULL;
memset( &ctx, 0, sizeof ctx );
ctx.exact = 1; /* use the key ID exactly as given */
ctx.not_allocated = 1;
ctx.kr_handle = keydb_new (1);
ctx.nitems = 1;
ctx.items[0].mode = KEYDB_SEARCH_MODE_LONG_KID;
ctx.items[0].u.kid[0] = keyid[0];
ctx.items[0].u.kid[1] = keyid[1];
ctx.req_algo = sk->req_algo;
ctx.req_usage = sk->req_usage;
rc = lookup( &ctx, &kb, 1 );
if ( !rc ) {
sk_from_block ( &ctx, sk, kb );
}
get_seckey_end( &ctx );
release_kbnode ( kb );
if( !rc ) {
/* check the secret key (this may prompt for a passprase to
* unlock the secret key
*/
rc = check_secret_key( sk, 0 );
}
return rc;
}
/****************
* Check whether the secret key is available. This is just a fast
* check and does not tell us whether the secret key is valid. It
* merely tells other whether there is some secret key.
* Returns: 0 := key is available
* G10ERR_NO_SECKEY := not availabe
*/
int
seckey_available( u32 *keyid )
{
int rc;
KEYDB_HANDLE hd = keydb_new (1);
rc = keydb_search_kid (hd, keyid);
if ( rc == -1 )
rc = G10ERR_NO_SECKEY;
keydb_release (hd);
return rc;
}
/****************
* Return the type of the user id:
*
* Please use the constants KEYDB_SERCH_MODE_xxx
* 0 = Invalid user ID
* 1 = exact match
* 2 = match a substring
* 3 = match an email address
* 4 = match a substring of an email address
* 5 = match an email address, but compare from end
* 6 = word match mode
* 10 = it is a short KEYID (don't care about keyid[0])
* 11 = it is a long KEYID
* 12 = it is a trustdb index (keyid is looked up)
* 16 = it is a 16 byte fingerprint
* 20 = it is a 20 byte fingerprint
* 21 = Unified fingerprint :fpr:pk_algo:
* (We don't use pk_algo yet)
*
* Rules used:
* - If the username starts with 8,9,16 or 17 hex-digits (the first one
* must be in the range 0..9), this is considered a keyid; depending
* on the length a short or complete one.
* - If the username starts with 32,33,40 or 41 hex-digits (the first one
* must be in the range 0..9), this is considered a fingerprint.
* - If the username starts with a left angle, we assume it is a complete
* email address and look only at this part.
* - If the username starts with a colon we assume it is a unified
* key specfification.
* - If the username starts with a '.', we assume it is the ending
* part of an email address
* - If the username starts with an '@', we assume it is a part of an
* email address
* - If the userid start with an '=' an exact compare is done.
* - If the userid starts with a '*' a case insensitive substring search is
* done (This is the default).
* - If the userid starts with a '+' we will compare individual words
* and a match requires that all the words are in the userid.
* Words are delimited by white space or "()<>[]{}.@-+_,;/&!"
* (note that you can't search for these characters). Compare
* is not case sensitive.
*/
int
classify_user_id( const char *name, KEYDB_SEARCH_DESC *desc )
{
const char *s;
int hexprefix = 0;
int hexlength;
int mode = 0;
KEYDB_SEARCH_DESC dummy_desc;
if (!desc)
desc = &dummy_desc;
/* clear the structure so that the mode field is set to zero unless
* we set it to the correct value right at the end of this function */
memset (desc, 0, sizeof *desc);
/* skip leading spaces. Fixme: what is with trailing spaces? */
for(s = name; *s && spacep (s); s++ )
;
switch (*s) {
case 0: /* empty string is an error */
return 0;
#if 0
case '.': /* an email address, compare from end */
mode = KEYDB_SEARCH_MODE_MAILEND;
s++;
desc->u.name = s;
break;
#endif
case '<': /* an email address */
mode = KEYDB_SEARCH_MODE_MAIL;
desc->u.name = s;
break;
case '@': /* part of an email address */
mode = KEYDB_SEARCH_MODE_MAILSUB;
s++;
desc->u.name = s;
break;
case '=': /* exact compare */
mode = KEYDB_SEARCH_MODE_EXACT;
s++;
desc->u.name = s;
break;
case '*': /* case insensitive substring search */
mode = KEYDB_SEARCH_MODE_SUBSTR;
s++;
desc->u.name = s;
break;
#if 0
case '+': /* compare individual words */
mode = KEYDB_SEARCH_MODE_WORDS;
s++;
desc->u.name = s;
break;
#endif
case '#': /* local user id */
return 0; /* This is now obsolete and van't not be used anymore*/
case ':': /*Unified fingerprint */
{
const char *se, *si;
int i;
se = strchr( ++s,':');
if ( !se )
return 0;
for (i=0,si=s; si < se; si++, i++ ) {
if ( !strchr("01234567890abcdefABCDEF", *si ) )
return 0; /* invalid digit */
}
if (i != 32 && i != 40)
return 0; /* invalid length of fpr*/
for (i=0,si=s; si < se; i++, si +=2)
desc->u.fpr[i] = hextobyte(si);
for ( ; i < 20; i++)
desc->u.fpr[i]= 0;
s = se + 1;
mode = KEYDB_SEARCH_MODE_FPR;
}
break;
default:
if (s[0] == '0' && s[1] == 'x') {
hexprefix = 1;
s += 2;
}
hexlength = strspn(s, "0123456789abcdefABCDEF");
if (hexlength >= 8 && s[hexlength] =='!') {
desc->exact = 1;
hexlength++; /* just for the following check */
}
/* check if a hexadecimal number is terminated by EOS or blank */
if (hexlength && s[hexlength] && !spacep(s+hexlength)) {
if (hexprefix) /* a "0x" prefix without correct */
return 0; /* termination is an error */
else /* The first chars looked like */
hexlength = 0; /* a hex number, but really were not. */
}
if (desc->exact)
hexlength--;
if (hexlength == 8
|| (!hexprefix && hexlength == 9 && *s == '0')){
/* short keyid */
if (hexlength == 9)
s++;
desc->u.kid[0] = 0;
desc->u.kid[1] = strtoul( s, NULL, 16 );
mode = KEYDB_SEARCH_MODE_SHORT_KID;
}
else if (hexlength == 16
|| (!hexprefix && hexlength == 17 && *s == '0')) {
/* complete keyid */
char buf[9];
if (hexlength == 17)
s++;
mem2str(buf, s, 9 );
desc->u.kid[0] = strtoul( buf, NULL, 16 );
desc->u.kid[1] = strtoul( s+8, NULL, 16 );
mode = KEYDB_SEARCH_MODE_LONG_KID;
}
else if (hexlength == 32 || (!hexprefix && hexlength == 33
&& *s == '0')) {
/* md5 fingerprint */
int i;
if (hexlength == 33)
s++;
memset(desc->u.fpr+16, 0, 4);
for (i=0; i < 16; i++, s+=2) {
int c = hextobyte(s);
if (c == -1)
return 0;
desc->u.fpr[i] = c;
}
mode = KEYDB_SEARCH_MODE_FPR16;
}
else if (hexlength == 40 || (!hexprefix && hexlength == 41
&& *s == '0')) {
/* sha1/rmd160 fingerprint */
int i;
if (hexlength == 41)
s++;
for (i=0; i < 20; i++, s+=2) {
int c = hextobyte(s);
if (c == -1)
return 0;
desc->u.fpr[i] = c;
}
mode = KEYDB_SEARCH_MODE_FPR20;
}
else if (!hexprefix) {
/* No hex indicator; check for a space separated
OpenPGP v4 fingerprint like:
8061 5870 F5BA D690 3336 86D0 F2AD 85AC 1E42 B367
or
8061 5870 F5BA D690 3336 86D0 F2AD 85AC 1E42 B367
*/
mode = 0;
hexlength = strspn (s, " 0123456789abcdefABCDEF");
if (s[hexlength] && s[hexlength] != ' ')
hexlength = 0; /* Followed by non-space. */
while (hexlength && s[hexlength-1] == ' ')
hexlength--; /* Trim trailing spaces. */
if ((hexlength == 49 || hexlength == 50)
&& (!s[hexlength] || s[hexlength] == ' ')) {
int i, c;
for (i=0; i < 20; i++) {
if (i && !(i % 2)) {
if (*s != ' ')
break;
s++;
/* Skip the double space in the middle but
don't require it to help copying
fingerprints from sources which fold
multiple space to one. */
if (i == 10 && *s == ' ')
s++;
}
c = hextobyte(s);
if (c == -1)
break;
desc->u.fpr[i] = c;
s += 2;
}
if (i == 20)
mode = KEYDB_SEARCH_MODE_FPR20;
}
if (!mode) {
desc->exact = 0;
desc->u.name = s;
mode = KEYDB_SEARCH_MODE_SUBSTR; /* default mode */
}
}
else /* This was a hex number with a prefix */
return 0; /* and a wrong length */
}
desc->mode = mode;
return mode;
}
static int
skip_unusable(void *dummy, u32 *keyid,PKT_user_id *uid)
{
int unusable=0;
KBNODE keyblock;
(void)dummy;
keyblock=get_pubkeyblock(keyid);
if(!keyblock)
{
log_error("error checking usability status of %s\n",keystr(keyid));
goto leave;
}
/* Is the user ID in question revoked/expired? */
if(uid)
{
KBNODE node;
for(node=keyblock;node;node=node->next)
{
if(node->pkt->pkttype==PKT_USER_ID)
{
if(cmp_user_ids(uid,node->pkt->pkt.user_id)==0
&& (node->pkt->pkt.user_id->is_revoked
|| node->pkt->pkt.user_id->is_expired))
{
unusable=1;
break;
}
}
}
}
if(!unusable)
unusable=pk_is_disabled(keyblock->pkt->pkt.public_key);
leave:
release_kbnode(keyblock);
return unusable;
}
/****************
* Try to get the pubkey by the userid. This function looks for the
* first pubkey certificate which has the given name in a user_id. if
* pk/sk has the pubkey algo set, the function will only return a
* pubkey with that algo. If namelist is NULL, the first key is
* returned. The caller should provide storage for either the pk or
* the sk. If ret_kb is not NULL the function will return the
* keyblock there.
*/
static int
key_byname( GETKEY_CTX *retctx, STRLIST namelist,
PKT_public_key *pk, PKT_secret_key *sk,
int secmode, int include_unusable,
KBNODE *ret_kb, KEYDB_HANDLE *ret_kdbhd )
{
int rc = 0;
int n;
STRLIST r;
GETKEY_CTX ctx;
KBNODE help_kb = NULL;
if( retctx ) {/* reset the returned context in case of error */
assert (!ret_kdbhd); /* not allowed because the handle is
stored in the context */
*retctx = NULL;
}
if (ret_kdbhd)
*ret_kdbhd = NULL;
if(!namelist)
{
ctx = xmalloc_clear (sizeof *ctx);
ctx->nitems = 1;
ctx->items[0].mode=KEYDB_SEARCH_MODE_FIRST;
if(!include_unusable)
ctx->items[0].skipfnc=skip_unusable;
}
else
{
/* build the search context */
for(n=0, r=namelist; r; r = r->next )
n++;
ctx = xmalloc_clear (sizeof *ctx + (n-1)*sizeof ctx->items );
ctx->nitems = n;
for(n=0, r=namelist; r; r = r->next, n++ )
{
classify_user_id (r->d, &ctx->items[n]);
if (ctx->items[n].exact)
ctx->exact = 1;
if (!ctx->items[n].mode)
{
xfree (ctx);
return G10ERR_INV_USER_ID;
}
if(!include_unusable
&& ctx->items[n].mode!=KEYDB_SEARCH_MODE_SHORT_KID
&& ctx->items[n].mode!=KEYDB_SEARCH_MODE_LONG_KID
&& ctx->items[n].mode!=KEYDB_SEARCH_MODE_FPR16
&& ctx->items[n].mode!=KEYDB_SEARCH_MODE_FPR20
&& ctx->items[n].mode!=KEYDB_SEARCH_MODE_FPR)
ctx->items[n].skipfnc=skip_unusable;
}
}
ctx->kr_handle = keydb_new (secmode);
if ( !ret_kb )
ret_kb = &help_kb;
if( secmode ) {
if (sk) {
ctx->req_algo = sk->req_algo;
ctx->req_usage = sk->req_usage;
}
rc = lookup( ctx, ret_kb, 1 );
if ( !rc && sk ) {
sk_from_block ( ctx, sk, *ret_kb );
}
}
else {
if (pk) {
ctx->req_algo = pk->req_algo;
ctx->req_usage = pk->req_usage;
}
rc = lookup( ctx, ret_kb, 0 );
if ( !rc && pk ) {
pk_from_block ( ctx, pk, *ret_kb );
}
}
release_kbnode ( help_kb );
if (retctx) /* caller wants the context */
*retctx = ctx;
else {
if (ret_kdbhd) {
*ret_kdbhd = ctx->kr_handle;
ctx->kr_handle = NULL;
}
get_pubkey_end (ctx);
}
return rc;
}
/* Find a public key from NAME and return the keyblock or the key. If
ret_kdb is not NULL, the KEYDB handle used to locate this keyblock
is returned and the caller is responsible for closing it. If a key
was not found and NAME is a valid RFC822 mailbox and PKA retrieval
has been enabled, we try to import the pkea via the PKA
mechanism. */
int
get_pubkey_byname (PKT_public_key *pk,
const char *name, KBNODE *ret_keyblock,
KEYDB_HANDLE *ret_kdbhd, int include_unusable )
{
int rc;
STRLIST namelist = NULL;
add_to_strlist( &namelist, name );
rc = key_byname( NULL, namelist, pk, NULL, 0,
include_unusable, ret_keyblock, ret_kdbhd);
/* If the requested name resembles a valid mailbox and automatic
retrieval has been enabled, we try to import the key. */
if (rc == G10ERR_NO_PUBKEY && is_valid_mailbox(name))
{
struct akl *akl;
for(akl=opt.auto_key_locate;akl;akl=akl->next)
{
unsigned char *fpr=NULL;
size_t fpr_len;
switch(akl->type)
{
case AKL_CERT:
glo_ctrl.in_auto_key_retrieve++;
rc=keyserver_import_cert(name,&fpr,&fpr_len);
glo_ctrl.in_auto_key_retrieve--;
if(rc==0)
log_info(_("automatically retrieved `%s' via %s\n"),
name,"DNS CERT");
break;
case AKL_PKA:
glo_ctrl.in_auto_key_retrieve++;
rc=keyserver_import_pka(name,&fpr,&fpr_len);
glo_ctrl.in_auto_key_retrieve--;
if(rc==0)
log_info(_("automatically retrieved `%s' via %s\n"),
name,"PKA");
break;
case AKL_LDAP:
glo_ctrl.in_auto_key_retrieve++;
rc=keyserver_import_ldap(name,&fpr,&fpr_len);
glo_ctrl.in_auto_key_retrieve--;
if(rc==0)
log_info(_("automatically retrieved `%s' via %s\n"),
name,"LDAP");
break;
case AKL_KEYSERVER:
/* Strictly speaking, we don't need to only use a valid
mailbox for the getname search, but it helps cut down
on the problem of searching for something like "john"
and getting a whole lot of keys back. */
if(opt.keyserver)
{
glo_ctrl.in_auto_key_retrieve++;
rc=keyserver_import_name(name,&fpr,&fpr_len,opt.keyserver);
glo_ctrl.in_auto_key_retrieve--;
if(rc==0)
log_info(_("automatically retrieved `%s' via %s\n"),
name,opt.keyserver->uri);
}
break;
case AKL_SPEC:
{
struct keyserver_spec *keyserver;
keyserver=keyserver_match(akl->spec);
glo_ctrl.in_auto_key_retrieve++;
rc=keyserver_import_name(name,&fpr,&fpr_len,keyserver);
glo_ctrl.in_auto_key_retrieve--;
if(rc==0)
log_info(_("automatically retrieved `%s' via %s\n"),
name,akl->spec->uri);
}
break;
}
/* Use the fingerprint of the key that we actually fetched.
This helps prevent problems where the key that we fetched
doesn't have the same name that we used to fetch it. In
the case of CERT and PKA, this is an actual security
requirement as the URL might point to a key put in by an
attacker. By forcing the use of the fingerprint, we
won't use the attacker's key here. */
if(rc==0 && fpr)
{
int i;
char fpr_string[MAX_FINGERPRINT_LEN*2+1];
assert(fpr_len<=MAX_FINGERPRINT_LEN);
free_strlist(namelist);
namelist=NULL;
for(i=0;i<fpr_len;i++)
sprintf(fpr_string+2*i,"%02X",fpr[i]);
if(opt.verbose)
log_info("auto-key-locate found fingerprint %s\n",fpr_string);
add_to_strlist( &namelist, fpr_string );
xfree(fpr);
}
rc = key_byname( NULL, namelist, pk, NULL, 0,
include_unusable, ret_keyblock, ret_kdbhd);
if(rc!=G10ERR_NO_PUBKEY)
break;
}
}
free_strlist( namelist );
return rc;
}
int
get_pubkey_bynames( GETKEY_CTX *retctx, PKT_public_key *pk,
STRLIST names, KBNODE *ret_keyblock )
{
return key_byname( retctx, names, pk, NULL, 0, 1, ret_keyblock, NULL);
}
int
get_pubkey_next( GETKEY_CTX ctx, PKT_public_key *pk, KBNODE *ret_keyblock )
{
int rc;
rc = lookup( ctx, ret_keyblock, 0 );
if ( !rc && pk && ret_keyblock )
pk_from_block ( ctx, pk, *ret_keyblock );
return rc;
}
void
get_pubkey_end( GETKEY_CTX ctx )
{
if( ctx ) {
memset (&ctx->kbpos, 0, sizeof ctx->kbpos);
keydb_release (ctx->kr_handle);
if( !ctx->not_allocated )
xfree( ctx );
}
}
/****************
* Search for a key with the given fingerprint.
* FIXME:
* We should replace this with the _byname function. Thiscsan be done
* by creating a userID conforming to the unified fingerprint style.
*/
int
get_pubkey_byfprint( PKT_public_key *pk,
const byte *fprint, size_t fprint_len)
{
int rc;
if( fprint_len == 20 || fprint_len == 16 ) {
struct getkey_ctx_s ctx;
KBNODE kb = NULL;
memset( &ctx, 0, sizeof ctx );
ctx.exact = 1 ;
ctx.not_allocated = 1;
ctx.kr_handle = keydb_new (0);
ctx.nitems = 1;
ctx.items[0].mode = fprint_len==16? KEYDB_SEARCH_MODE_FPR16
: KEYDB_SEARCH_MODE_FPR20;
memcpy( ctx.items[0].u.fpr, fprint, fprint_len );
rc = lookup( &ctx, &kb, 0 );
if (!rc && pk )
pk_from_block ( &ctx, pk, kb );
release_kbnode ( kb );
get_pubkey_end( &ctx );
}
else
rc = G10ERR_GENERAL; /* Oops */
return rc;
}
/* Get a public key and store it into the allocated pk. This function
differs from get_pubkey_byfprint() in that it does not do a check
of the key to avoid recursion. It should be used only in very
certain cases. PK may be NULL to check just for the existance of
the key. */
int
get_pubkey_byfprint_fast (PKT_public_key *pk,
const byte *fprint, size_t fprint_len)
{
int rc = 0;
KEYDB_HANDLE hd;
KBNODE keyblock;
byte fprbuf[MAX_FINGERPRINT_LEN];
int i;
for (i=0; i < MAX_FINGERPRINT_LEN && i < fprint_len; i++)
fprbuf[i] = fprint[i];
while (i < MAX_FINGERPRINT_LEN)
fprbuf[i++] = 0;
hd = keydb_new (0);
rc = keydb_search_fpr (hd, fprbuf);
if (rc == -1)
{
keydb_release (hd);
return G10ERR_NO_PUBKEY;
}
rc = keydb_get_keyblock (hd, &keyblock);
keydb_release (hd);
if (rc)
{
log_error ("keydb_get_keyblock failed: %s\n", g10_errstr(rc));
return G10ERR_NO_PUBKEY;
}
assert ( keyblock->pkt->pkttype == PKT_PUBLIC_KEY
|| keyblock->pkt->pkttype == PKT_PUBLIC_SUBKEY );
if (pk)
copy_public_key (pk, keyblock->pkt->pkt.public_key );
release_kbnode (keyblock);
/* Not caching key here since it won't have all of the fields
properly set. */
return 0;
}
/****************
* Search for a key with the given fingerprint and return the
* complete keyblock which may have more than only this key.
*/
int
get_keyblock_byfprint( KBNODE *ret_keyblock, const byte *fprint,
size_t fprint_len )
{
int rc;
if( fprint_len == 20 || fprint_len == 16 ) {
struct getkey_ctx_s ctx;
memset( &ctx, 0, sizeof ctx );
ctx.not_allocated = 1;
ctx.kr_handle = keydb_new (0);
ctx.nitems = 1;
ctx.items[0].mode = fprint_len==16? KEYDB_SEARCH_MODE_FPR16
: KEYDB_SEARCH_MODE_FPR20;
memcpy( ctx.items[0].u.fpr, fprint, fprint_len );
rc = lookup( &ctx, ret_keyblock, 0 );
get_pubkey_end( &ctx );
}
else
rc = G10ERR_GENERAL; /* Oops */
return rc;
}
/****************
* Get a secret key by name and store it into sk
* If NAME is NULL use the default key
*/
static int
get_seckey_byname2( GETKEY_CTX *retctx,
PKT_secret_key *sk, const char *name, int unprotect,
KBNODE *retblock )
{
STRLIST namelist = NULL;
int rc,include_unusable=1;
/* If we have no name, try to use the default secret key. If we
have no default, we'll use the first usable one. */
if( !name && opt.def_secret_key && *opt.def_secret_key )
add_to_strlist( &namelist, opt.def_secret_key );
else if(name)
add_to_strlist( &namelist, name );
else
include_unusable=0;
rc = key_byname( retctx, namelist, NULL, sk, 1, include_unusable,
retblock, NULL );
free_strlist( namelist );
if( !rc && unprotect )
rc = check_secret_key( sk, 0 );
return rc;
}
int
get_seckey_byname( PKT_secret_key *sk, const char *name, int unlock )
{
return get_seckey_byname2 ( NULL, sk, name, unlock, NULL );
}
int
get_seckey_bynames( GETKEY_CTX *retctx, PKT_secret_key *sk,
STRLIST names, KBNODE *ret_keyblock )
{
return key_byname( retctx, names, NULL, sk, 1, 1, ret_keyblock, NULL );
}
int
get_seckey_next( GETKEY_CTX ctx, PKT_secret_key *sk, KBNODE *ret_keyblock )
{
int rc;
rc = lookup( ctx, ret_keyblock, 1 );
if ( !rc && sk && ret_keyblock )
sk_from_block ( ctx, sk, *ret_keyblock );
return rc;
}
void
get_seckey_end( GETKEY_CTX ctx )
{
get_pubkey_end( ctx );
}
/****************
* Search for a key with the given fingerprint.
* FIXME:
* We should replace this with the _byname function. Thiscsan be done
* by creating a userID conforming to the unified fingerprint style.
*/
int
get_seckey_byfprint( PKT_secret_key *sk,
const byte *fprint, size_t fprint_len)
{
int rc;
if( fprint_len == 20 || fprint_len == 16 ) {
struct getkey_ctx_s ctx;
KBNODE kb = NULL;
memset( &ctx, 0, sizeof ctx );
ctx.exact = 1 ;
ctx.not_allocated = 1;
ctx.kr_handle = keydb_new (1);
ctx.nitems = 1;
ctx.items[0].mode = fprint_len==16? KEYDB_SEARCH_MODE_FPR16
: KEYDB_SEARCH_MODE_FPR20;
memcpy( ctx.items[0].u.fpr, fprint, fprint_len );
rc = lookup( &ctx, &kb, 1 );
if (!rc && sk )
sk_from_block ( &ctx, sk, kb );
release_kbnode ( kb );
get_seckey_end( &ctx );
}
else
rc = G10ERR_GENERAL; /* Oops */
return rc;
}
/* Search for a secret key with the given fingerprint and return the
complete keyblock which may have more than only this key. */
int
get_seckeyblock_byfprint (KBNODE *ret_keyblock, const byte *fprint,
size_t fprint_len )
{
int rc;
struct getkey_ctx_s ctx;
if (fprint_len != 20 && fprint_len == 16)
return G10ERR_GENERAL; /* Oops */
memset (&ctx, 0, sizeof ctx);
ctx.not_allocated = 1;
ctx.kr_handle = keydb_new (1);
ctx.nitems = 1;
ctx.items[0].mode = (fprint_len==16
? KEYDB_SEARCH_MODE_FPR16
: KEYDB_SEARCH_MODE_FPR20);
memcpy (ctx.items[0].u.fpr, fprint, fprint_len);
rc = lookup (&ctx, ret_keyblock, 1);
get_seckey_end (&ctx);
return rc;
}
/************************************************
************* Merging stuff ********************
************************************************/
/****************
* merge all selfsignatures with the keys.
* FIXME: replace this at least for the public key parts
* by merge_selfsigs.
* It is still used in keyedit.c and
* at 2 or 3 other places - check whether it is really needed.
* It might be needed by the key edit and import stuff because
* the keylock is changed.
*/
void
merge_keys_and_selfsig( KBNODE keyblock )
{
PKT_public_key *pk = NULL;
PKT_secret_key *sk = NULL;
PKT_signature *sig;
KBNODE k;
u32 kid[2] = { 0, 0 };
u32 sigdate = 0;
if (keyblock && keyblock->pkt->pkttype == PKT_PUBLIC_KEY ) {
/* divert to our new function */
merge_selfsigs (keyblock);
return;
}
/* still need the old one because the new one can't handle secret keys */
for(k=keyblock; k; k = k->next ) {
if( k->pkt->pkttype == PKT_PUBLIC_KEY
|| k->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
pk = k->pkt->pkt.public_key; sk = NULL;
if( pk->version < 4 )
pk = NULL; /* not needed for old keys */
else if( k->pkt->pkttype == PKT_PUBLIC_KEY )
keyid_from_pk( pk, kid );
else if( !pk->expiredate ) { /* and subkey */
/* insert the expiration date here */
/*FIXME!!! pk->expiredate = subkeys_expiretime( k, kid );*/
}
sigdate = 0;
}
else if( k->pkt->pkttype == PKT_SECRET_KEY
|| k->pkt->pkttype == PKT_SECRET_SUBKEY ) {
pk = NULL; sk = k->pkt->pkt.secret_key;
if( sk->version < 4 )
sk = NULL;
else if( k->pkt->pkttype == PKT_SECRET_KEY )
keyid_from_sk( sk, kid );
sigdate = 0;
}
else if( (pk || sk ) && k->pkt->pkttype == PKT_SIGNATURE
&& (sig=k->pkt->pkt.signature)->sig_class >= 0x10
&& sig->sig_class <= 0x30 && sig->version > 3
&& !(sig->sig_class == 0x18 || sig->sig_class == 0x28)
&& sig->keyid[0] == kid[0] && sig->keyid[1] == kid[1] ) {
/* okay this is a self-signature which can be used.
* This is not used for subkey binding signature, becuase this
* is done above.
* FIXME: We should only use this if the signature is valid
* but this is time consuming - we must provide another
* way to handle this
*/
const byte *p;
u32 ed;
p = parse_sig_subpkt( sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL );
if( pk ) {
ed = p? pk->timestamp + buffer_to_u32(p):0;
if( sig->timestamp > sigdate ) {
pk->expiredate = ed;
sigdate = sig->timestamp;
}
}
else {
ed = p? sk->timestamp + buffer_to_u32(p):0;
if( sig->timestamp > sigdate ) {
sk->expiredate = ed;
sigdate = sig->timestamp;
}
}
}
if(pk && (pk->expiredate==0 ||
(pk->max_expiredate && pk->expiredate>pk->max_expiredate)))
pk->expiredate=pk->max_expiredate;
if(sk && (sk->expiredate==0 ||
(sk->max_expiredate && sk->expiredate>sk->max_expiredate)))
sk->expiredate=sk->max_expiredate;
}
}
static int
parse_key_usage(PKT_signature *sig)
{
int key_usage=0;
const byte *p;
size_t n;
byte flags;
p=parse_sig_subpkt(sig->hashed,SIGSUBPKT_KEY_FLAGS,&n);
if(p && n)
{
/* first octet of the keyflags */
flags=*p;
if(flags & 1)
{
key_usage |= PUBKEY_USAGE_CERT;
flags&=~1;
}
if(flags & 2)
{
key_usage |= PUBKEY_USAGE_SIG;
flags&=~2;
}
/* We do not distinguish between encrypting communications and
encrypting storage. */
if(flags & (0x04|0x08))
{
key_usage |= PUBKEY_USAGE_ENC;
flags&=~(0x04|0x08);
}
if(flags & 0x20)
{
key_usage |= PUBKEY_USAGE_AUTH;
flags&=~0x20;
}
if(flags)
key_usage |= PUBKEY_USAGE_UNKNOWN;
+
+ if (!key_usage)
+ key_usage |= PUBKEY_USAGE_NONE;
}
+ else if (p) /* Key flags of length zero. */
+ key_usage |= PUBKEY_USAGE_NONE;
/* We set PUBKEY_USAGE_UNKNOWN to indicate that this key has a
capability that we do not handle. This serves to distinguish
between a zero key usage which we handle as the default
capabilities for that algorithm, and a usage that we do not
- handle. */
+ handle. Likewise we use PUBKEY_USAGE_NONE to indicate that
+ key_flags have been given but they do not specify any usage. */
return key_usage;
}
/*
* Apply information from SIGNODE (which is the valid self-signature
* associated with that UID) to the UIDNODE:
* - wether the UID has been revoked
* - assumed creation date of the UID
* - temporary store the keyflags here
* - temporary store the key expiration time here
* - mark whether the primary user ID flag hat been set.
* - store the preferences
*/
static void
fixup_uidnode ( KBNODE uidnode, KBNODE signode, u32 keycreated )
{
PKT_user_id *uid = uidnode->pkt->pkt.user_id;
PKT_signature *sig = signode->pkt->pkt.signature;
const byte *p, *sym, *hash, *zip;
size_t n, nsym, nhash, nzip;
sig->flags.chosen_selfsig = 1; /* we chose this one */
uid->created = 0; /* not created == invalid */
if ( IS_UID_REV ( sig ) )
{
uid->is_revoked = 1;
return; /* has been revoked */
}
else
uid->is_revoked=0;
uid->expiredate = sig->expiredate;
if(sig->flags.expired)
{
uid->is_expired = 1;
return; /* has expired */
}
else
uid->is_expired=0;
uid->created = sig->timestamp; /* this one is okay */
uid->selfsigversion = sig->version;
/* If we got this far, it's not expired :) */
uid->is_expired = 0;
/* store the key flags in the helper variable for later processing */
uid->help_key_usage=parse_key_usage(sig);
/* ditto for the key expiration */
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
if( p && buffer_to_u32(p) )
uid->help_key_expire = keycreated + buffer_to_u32(p);
else
uid->help_key_expire = 0;
/* Set the primary user ID flag - we will later wipe out some
* of them to only have one in our keyblock */
uid->is_primary = 0;
p = parse_sig_subpkt ( sig->hashed, SIGSUBPKT_PRIMARY_UID, NULL );
if ( p && *p )
uid->is_primary = 2;
/* We could also query this from the unhashed area if it is not in
* the hased area and then later try to decide which is the better
* there should be no security problem with this.
* For now we only look at the hashed one.
*/
/* Now build the preferences list. These must come from the
hashed section so nobody can modify the ciphers a key is
willing to accept. */
p = parse_sig_subpkt ( sig->hashed, SIGSUBPKT_PREF_SYM, &n );
sym = p; nsym = p?n:0;
p = parse_sig_subpkt ( sig->hashed, SIGSUBPKT_PREF_HASH, &n );
hash = p; nhash = p?n:0;
p = parse_sig_subpkt ( sig->hashed, SIGSUBPKT_PREF_COMPR, &n );
zip = p; nzip = p?n:0;
if (uid->prefs)
xfree (uid->prefs);
n = nsym + nhash + nzip;
if (!n)
uid->prefs = NULL;
else {
uid->prefs = xmalloc (sizeof (*uid->prefs) * (n+1));
n = 0;
for (; nsym; nsym--, n++) {
uid->prefs[n].type = PREFTYPE_SYM;
uid->prefs[n].value = *sym++;
}
for (; nhash; nhash--, n++) {
uid->prefs[n].type = PREFTYPE_HASH;
uid->prefs[n].value = *hash++;
}
for (; nzip; nzip--, n++) {
uid->prefs[n].type = PREFTYPE_ZIP;
uid->prefs[n].value = *zip++;
}
uid->prefs[n].type = PREFTYPE_NONE; /* end of list marker */
uid->prefs[n].value = 0;
}
/* see whether we have the MDC feature */
uid->flags.mdc = 0;
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_FEATURES, &n);
if (p && n && (p[0] & 0x01))
uid->flags.mdc = 1;
/* and the keyserver modify flag */
uid->flags.ks_modify = 1;
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KS_FLAGS, &n);
if (p && n && (p[0] & 0x80))
uid->flags.ks_modify = 0;
}
static void
sig_to_revoke_info(PKT_signature *sig,struct revoke_info *rinfo)
{
rinfo->date = sig->timestamp;
rinfo->algo = sig->pubkey_algo;
rinfo->keyid[0] = sig->keyid[0];
rinfo->keyid[1] = sig->keyid[1];
}
static void
merge_selfsigs_main(KBNODE keyblock, int *r_revoked, struct revoke_info *rinfo)
{
PKT_public_key *pk = NULL;
KBNODE k;
u32 kid[2];
u32 sigdate, uiddate, uiddate2;
KBNODE signode, uidnode, uidnode2;
u32 curtime = make_timestamp ();
unsigned int key_usage = 0;
u32 keytimestamp = 0;
u32 key_expire = 0;
int key_expire_seen = 0;
byte sigversion = 0;
*r_revoked = 0;
memset(rinfo,0,sizeof(*rinfo));
if ( keyblock->pkt->pkttype != PKT_PUBLIC_KEY )
BUG ();
pk = keyblock->pkt->pkt.public_key;
keytimestamp = pk->timestamp;
keyid_from_pk( pk, kid );
pk->main_keyid[0] = kid[0];
pk->main_keyid[1] = kid[1];
if ( pk->version < 4 ) {
/* before v4 the key packet itself contains the expiration
* date and there was no way to change it, so we start with
* the one from the key packet */
key_expire = pk->max_expiredate;
key_expire_seen = 1;
}
/* first pass: find the latest direct key self-signature.
* We assume that the newest one overrides all others
*/
/* In case this key was already merged */
xfree(pk->revkey);
pk->revkey=NULL;
pk->numrevkeys=0;
signode = NULL;
sigdate = 0; /* helper to find the latest signature */
for(k=keyblock; k && k->pkt->pkttype != PKT_USER_ID; k = k->next ) {
if ( k->pkt->pkttype == PKT_SIGNATURE ) {
PKT_signature *sig = k->pkt->pkt.signature;
if ( sig->keyid[0] == kid[0] && sig->keyid[1]==kid[1] ) {
if ( check_key_signature( keyblock, k, NULL ) )
; /* signature did not verify */
else if ( IS_KEY_REV (sig) ){
/* key has been revoked - there is no way to override
* such a revocation, so we theoretically can stop now.
* We should not cope with expiration times for revocations
* here because we have to assume that an attacker can
* generate all kinds of signatures. However due to the
* fact that the key has been revoked it does not harm
* either and by continuing we gather some more info on
* that key.
*/
*r_revoked = 1;
sig_to_revoke_info(sig,rinfo);
}
else if ( IS_KEY_SIG (sig) ) {
/* Add any revocation keys onto the pk. This is
particularly interesting since we normally only
get data from the most recent 1F signature, but
you need multiple 1F sigs to properly handle
revocation keys (PGP does it this way, and a
revocation key could be sensitive and hence in a
different signature). */
if(sig->revkey) {
int i;
pk->revkey=
xrealloc(pk->revkey,sizeof(struct revocation_key)*
(pk->numrevkeys+sig->numrevkeys));
for(i=0;i<sig->numrevkeys;i++)
memcpy(&pk->revkey[pk->numrevkeys++],
sig->revkey[i],
sizeof(struct revocation_key));
}
if( sig->timestamp >= sigdate ) {
if(sig->flags.expired)
; /* signature has expired - ignore it */
else {
sigdate = sig->timestamp;
signode = k;
if( sig->version > sigversion )
sigversion = sig->version;
}
}
}
}
}
}
/* Remove dupes from the revocation keys */
if(pk->revkey)
{
int i,j,x,changed=0;
for(i=0;i<pk->numrevkeys;i++)
{
for(j=i+1;j<pk->numrevkeys;j++)
{
if(memcmp(&pk->revkey[i],&pk->revkey[j],
sizeof(struct revocation_key))==0)
{
/* remove j */
for(x=j;x<pk->numrevkeys-1;x++)
pk->revkey[x]=pk->revkey[x+1];
pk->numrevkeys--;
j--;
changed=1;
}
}
}
if(changed)
pk->revkey=xrealloc(pk->revkey,
pk->numrevkeys*sizeof(struct revocation_key));
}
if ( signode )
{
/* some information from a direct key signature take precedence
* over the same information given in UID sigs.
*/
PKT_signature *sig = signode->pkt->pkt.signature;
const byte *p;
key_usage=parse_key_usage(sig);
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
if( p && buffer_to_u32(p) )
{
key_expire = keytimestamp + buffer_to_u32(p);
key_expire_seen = 1;
}
/* mark that key as valid: one direct key signature should
* render a key as valid */
pk->is_valid = 1;
}
/* pass 1.5: look for key revocation signatures that were not made
by the key (i.e. did a revocation key issue a revocation for
us?). Only bother to do this if there is a revocation key in
the first place and we're not revoked already. */
if(!*r_revoked && pk->revkey)
for(k=keyblock; k && k->pkt->pkttype != PKT_USER_ID; k = k->next )
{
if ( k->pkt->pkttype == PKT_SIGNATURE )
{
PKT_signature *sig = k->pkt->pkt.signature;
if(IS_KEY_REV(sig) &&
(sig->keyid[0]!=kid[0] || sig->keyid[1]!=kid[1]))
{
int rc=check_revocation_keys(pk,sig);
if(rc==0)
{
*r_revoked=2;
sig_to_revoke_info(sig,rinfo);
/* don't continue checking since we can't be any
more revoked than this */
break;
}
else if(rc==G10ERR_NO_PUBKEY)
pk->maybe_revoked=1;
/* A failure here means the sig did not verify, was
not issued by a revocation key, or a revocation
key loop was broken. If a revocation key isn't
findable, however, the key might be revoked and
we don't know it. */
/* TODO: In the future handle subkey and cert
revocations? PGP doesn't, but it's in 2440. */
}
}
}
/* second pass: look at the self-signature of all user IDs */
signode = uidnode = NULL;
sigdate = 0; /* helper to find the latest signature in one user ID */
for(k=keyblock; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY; k = k->next ) {
if ( k->pkt->pkttype == PKT_USER_ID ) {
if ( uidnode && signode )
{
fixup_uidnode ( uidnode, signode, keytimestamp );
pk->is_valid=1;
}
uidnode = k;
signode = NULL;
sigdate = 0;
}
else if ( k->pkt->pkttype == PKT_SIGNATURE && uidnode ) {
PKT_signature *sig = k->pkt->pkt.signature;
if ( sig->keyid[0] == kid[0] && sig->keyid[1]==kid[1] ) {
if ( check_key_signature( keyblock, k, NULL ) )
; /* signature did not verify */
else if ( (IS_UID_SIG (sig) || IS_UID_REV (sig))
&& sig->timestamp >= sigdate )
{
/* Note: we allow to invalidate cert revocations
* by a newer signature. An attacker can't use this
* because a key should be revoced with a key revocation.
* The reason why we have to allow for that is that at
* one time an email address may become invalid but later
* the same email address may become valid again (hired,
* fired, hired again).
*/
sigdate = sig->timestamp;
signode = k;
signode->pkt->pkt.signature->flags.chosen_selfsig=0;
if( sig->version > sigversion )
sigversion = sig->version;
}
}
}
}
if ( uidnode && signode ) {
fixup_uidnode ( uidnode, signode, keytimestamp );
pk->is_valid = 1;
}
/* If the key isn't valid yet, and we have
--allow-non-selfsigned-uid set, then force it valid. */
if(!pk->is_valid && opt.allow_non_selfsigned_uid)
{
if(opt.verbose)
log_info(_("Invalid key %s made valid by"
" --allow-non-selfsigned-uid\n"),keystr_from_pk(pk));
pk->is_valid = 1;
}
/* The key STILL isn't valid, so try and find an ultimately
trusted signature. */
if(!pk->is_valid)
{
uidnode=NULL;
for(k=keyblock; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY; k=k->next)
{
if ( k->pkt->pkttype == PKT_USER_ID )
uidnode = k;
else if ( k->pkt->pkttype == PKT_SIGNATURE && uidnode )
{
PKT_signature *sig = k->pkt->pkt.signature;
if(sig->keyid[0] != kid[0] || sig->keyid[1]!=kid[1])
{
PKT_public_key *ultimate_pk;
ultimate_pk=xmalloc_clear(sizeof(*ultimate_pk));
/* We don't want to use the full get_pubkey to
avoid infinite recursion in certain cases.
There is no reason to check that an ultimately
trusted key is still valid - if it has been
revoked or the user should also renmove the
ultimate trust flag. */
if(get_pubkey_fast(ultimate_pk,sig->keyid)==0
&& check_key_signature2(keyblock,k,ultimate_pk,
NULL,NULL,NULL,NULL)==0
&& get_ownertrust(ultimate_pk)==TRUST_ULTIMATE)
{
free_public_key(ultimate_pk);
pk->is_valid=1;
break;
}
free_public_key(ultimate_pk);
}
}
}
}
/* Record the highest selfsig version so we know if this is a v3
key through and through, or a v3 key with a v4 selfsig
somewhere. This is useful in a few places to know if the key
must be treated as PGP2-style or OpenPGP-style. Note that a
selfsig revocation with a higher version number will also raise
this value. This is okay since such a revocation must be
issued by the user (i.e. it cannot be issued by someone else to
modify the key behavior.) */
pk->selfsigversion=sigversion;
/* Now that we had a look at all user IDs we can now get some information
* from those user IDs.
*/
if ( !key_usage ) {
/* find the latest user ID with key flags set */
uiddate = 0; /* helper to find the latest user ID */
for(k=keyblock; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY;
k = k->next ) {
if ( k->pkt->pkttype == PKT_USER_ID ) {
PKT_user_id *uid = k->pkt->pkt.user_id;
if ( uid->help_key_usage && uid->created > uiddate ) {
key_usage = uid->help_key_usage;
uiddate = uid->created;
}
}
}
}
if ( !key_usage ) { /* no key flags at all: get it from the algo */
key_usage = openpgp_pk_algo_usage ( pk->pubkey_algo );
}
else { /* check that the usage matches the usage as given by the algo */
int x = openpgp_pk_algo_usage ( pk->pubkey_algo );
if ( x ) /* mask it down to the actual allowed usage */
key_usage &= x;
}
/* Whatever happens, it's a primary key, so it can certify. */
pk->pubkey_usage = key_usage|PUBKEY_USAGE_CERT;
if ( !key_expire_seen ) {
/* find the latest valid user ID with a key expiration set
* Note, that this may be a different one from the above because
* some user IDs may have no expiration date set */
uiddate = 0;
for(k=keyblock; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY;
k = k->next ) {
if ( k->pkt->pkttype == PKT_USER_ID ) {
PKT_user_id *uid = k->pkt->pkt.user_id;
if ( uid->help_key_expire && uid->created > uiddate ) {
key_expire = uid->help_key_expire;
uiddate = uid->created;
}
}
}
}
/* Currently only v3 keys have a maximum expiration date, but I'll
bet v5 keys get this feature again. */
if(key_expire==0 || (pk->max_expiredate && key_expire>pk->max_expiredate))
key_expire=pk->max_expiredate;
pk->has_expired = key_expire >= curtime? 0 : key_expire;
pk->expiredate = key_expire;
/* Fixme: we should see how to get rid of the expiretime fields but
* this needs changes at other places too. */
/* and now find the real primary user ID and delete all others */
uiddate = uiddate2 = 0;
uidnode = uidnode2 = NULL;
for(k=keyblock; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY; k = k->next ) {
if ( k->pkt->pkttype == PKT_USER_ID &&
!k->pkt->pkt.user_id->attrib_data) {
PKT_user_id *uid = k->pkt->pkt.user_id;
if (uid->is_primary)
{
if(uid->created > uiddate)
{
uiddate = uid->created;
uidnode = k;
}
else if(uid->created==uiddate && uidnode)
{
/* The dates are equal, so we need to do a
different (and arbitrary) comparison. This
should rarely, if ever, happen. It's good to
try and guarantee that two different GnuPG
users with two different keyrings at least pick
the same primary. */
if(cmp_user_ids(uid,uidnode->pkt->pkt.user_id)>0)
uidnode=k;
}
}
else
{
if(uid->created > uiddate2)
{
uiddate2 = uid->created;
uidnode2 = k;
}
else if(uid->created==uiddate2 && uidnode2)
{
if(cmp_user_ids(uid,uidnode2->pkt->pkt.user_id)>0)
uidnode2=k;
}
}
}
}
if ( uidnode ) {
for(k=keyblock; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY;
k = k->next ) {
if ( k->pkt->pkttype == PKT_USER_ID &&
!k->pkt->pkt.user_id->attrib_data) {
PKT_user_id *uid = k->pkt->pkt.user_id;
if ( k != uidnode )
uid->is_primary = 0;
}
}
}
else if( uidnode2 ) {
/* none is flagged primary - use the latest user ID we have,
and disambiguate with the arbitrary packet comparison. */
uidnode2->pkt->pkt.user_id->is_primary = 1;
}
else
{
/* None of our uids were self-signed, so pick the one that
sorts first to be the primary. This is the best we can do
here since there are no self sigs to date the uids. */
uidnode = NULL;
for(k=keyblock; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY;
k = k->next )
{
if(k->pkt->pkttype==PKT_USER_ID
&& !k->pkt->pkt.user_id->attrib_data)
{
if(!uidnode)
{
uidnode=k;
uidnode->pkt->pkt.user_id->is_primary=1;
continue;
}
else
{
if(cmp_user_ids(k->pkt->pkt.user_id,
uidnode->pkt->pkt.user_id)>0)
{
uidnode->pkt->pkt.user_id->is_primary=0;
uidnode=k;
uidnode->pkt->pkt.user_id->is_primary=1;
}
else
k->pkt->pkt.user_id->is_primary=0; /* just to be
safe */
}
}
}
}
}
/* Convert a buffer to a signature. Useful for 0x19 embedded sigs.
Caller must free the signature when they are done. */
static PKT_signature *
buf_to_sig(const byte *buf,size_t len)
{
PKT_signature *sig=xmalloc_clear(sizeof(PKT_signature));
IOBUF iobuf=iobuf_temp_with_content(buf,len);
int save_mode=set_packet_list_mode(0);
if(parse_signature(iobuf,PKT_SIGNATURE,len,sig)!=0)
{
xfree(sig);
sig=NULL;
}
set_packet_list_mode(save_mode);
iobuf_close(iobuf);
return sig;
}
static void
merge_selfsigs_subkey( KBNODE keyblock, KBNODE subnode )
{
PKT_public_key *mainpk = NULL, *subpk = NULL;
PKT_signature *sig;
KBNODE k;
u32 mainkid[2];
u32 sigdate = 0;
KBNODE signode;
u32 curtime = make_timestamp ();
unsigned int key_usage = 0;
u32 keytimestamp = 0;
u32 key_expire = 0;
const byte *p;
if ( subnode->pkt->pkttype != PKT_PUBLIC_SUBKEY )
BUG ();
mainpk = keyblock->pkt->pkt.public_key;
if ( mainpk->version < 4 )
return; /* (actually this should never happen) */
keyid_from_pk( mainpk, mainkid );
subpk = subnode->pkt->pkt.public_key;
keytimestamp = subpk->timestamp;
subpk->is_valid = 0;
subpk->main_keyid[0] = mainpk->main_keyid[0];
subpk->main_keyid[1] = mainpk->main_keyid[1];
/* find the latest key binding self-signature. */
signode = NULL;
sigdate = 0; /* helper to find the latest signature */
for(k=subnode->next; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY;
k = k->next ) {
if ( k->pkt->pkttype == PKT_SIGNATURE ) {
sig = k->pkt->pkt.signature;
if ( sig->keyid[0] == mainkid[0] && sig->keyid[1]==mainkid[1] ) {
if ( check_key_signature( keyblock, k, NULL ) )
; /* signature did not verify */
else if ( IS_SUBKEY_REV (sig) ) {
/* Note that this means that the date on a
revocation sig does not matter - even if the
binding sig is dated after the revocation sig,
the subkey is still marked as revoked. This
seems ok, as it is just as easy to make new
subkeys rather than re-sign old ones as the
problem is in the distribution. Plus, PGP (7)
does this the same way. */
subpk->is_revoked = 1;
sig_to_revoke_info(sig,&subpk->revoked);
/* although we could stop now, we continue to
* figure out other information like the old expiration
* time */
}
else if ( IS_SUBKEY_SIG (sig) && sig->timestamp >= sigdate )
{
if(sig->flags.expired)
; /* signature has expired - ignore it */
else
{
sigdate = sig->timestamp;
signode = k;
signode->pkt->pkt.signature->flags.chosen_selfsig=0;
}
}
}
}
}
/* no valid key binding */
if ( !signode )
return;
sig = signode->pkt->pkt.signature;
sig->flags.chosen_selfsig=1; /* so we know which selfsig we chose later */
key_usage=parse_key_usage(sig);
if ( !key_usage )
{
/* no key flags at all: get it from the algo */
key_usage = openpgp_pk_algo_usage ( subpk->pubkey_algo );
}
else
{
/* check that the usage matches the usage as given by the algo */
int x = openpgp_pk_algo_usage ( subpk->pubkey_algo );
if ( x ) /* mask it down to the actual allowed usage */
key_usage &= x;
}
subpk->pubkey_usage = key_usage;
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
if ( p && buffer_to_u32(p) )
key_expire = keytimestamp + buffer_to_u32(p);
else
key_expire = 0;
subpk->has_expired = key_expire >= curtime? 0 : key_expire;
subpk->expiredate = key_expire;
/* Check that algo exists. Elgamal sign+encrypt are only allowed
with option --rfc2440. */
if (RFC2440 && subpk->pubkey_algo == PUBKEY_ALGO_ELGAMAL)
;
else if(check_pubkey_algo(subpk->pubkey_algo))
return;
subpk->is_valid = 1;
/* Find the most recent 0x19 embedded signature on our self-sig. */
if(subpk->backsig==0)
{
int seq=0;
size_t n;
PKT_signature *backsig=NULL;
sigdate=0;
/* We do this while() since there may be other embedded
signatures in the future. We only want 0x19 here. */
while((p=enum_sig_subpkt(sig->hashed,
SIGSUBPKT_SIGNATURE,&n,&seq,NULL)))
if(n>3 && ((p[0]==3 && p[2]==0x19) || (p[0]==4 && p[1]==0x19)))
{
PKT_signature *tempsig=buf_to_sig(p,n);
if(tempsig)
{
if(tempsig->timestamp>sigdate)
{
if(backsig)
free_seckey_enc(backsig);
backsig=tempsig;
sigdate=backsig->timestamp;
}
else
free_seckey_enc(tempsig);
}
}
seq=0;
/* It is safe to have this in the unhashed area since the 0x19
is located on the selfsig for convenience, not security. */
while((p=enum_sig_subpkt(sig->unhashed,SIGSUBPKT_SIGNATURE,
&n,&seq,NULL)))
if(n>3 && ((p[0]==3 && p[2]==0x19) || (p[0]==4 && p[1]==0x19)))
{
PKT_signature *tempsig=buf_to_sig(p,n);
if(tempsig)
{
if(tempsig->timestamp>sigdate)
{
if(backsig)
free_seckey_enc(backsig);
backsig=tempsig;
sigdate=backsig->timestamp;
}
else
free_seckey_enc(tempsig);
}
}
if(backsig)
{
/* At ths point, backsig contains the most recent 0x19 sig.
Let's see if it is good. */
/* 2==valid, 1==invalid, 0==didn't check */
if(check_backsig(mainpk,subpk,backsig)==0)
subpk->backsig=2;
else
subpk->backsig=1;
free_seckey_enc(backsig);
}
}
}
/*
* Merge information from the self-signatures with the key, so that
* we can later use them more easy.
* The function works by first applying the self signatures to the
* primary key and the to each subkey.
* Here are the rules we use to decide which inormation from which
* self-signature is used:
* We check all self signatures or validity and ignore all invalid signatures.
* All signatures are then ordered by their creation date ....
* For the primary key:
* FIXME the docs
*/
static void
merge_selfsigs( KBNODE keyblock )
{
KBNODE k;
int revoked;
struct revoke_info rinfo;
PKT_public_key *main_pk;
prefitem_t *prefs;
int mdc_feature;
if ( keyblock->pkt->pkttype != PKT_PUBLIC_KEY ) {
if (keyblock->pkt->pkttype == PKT_SECRET_KEY ) {
log_error ("expected public key but found secret key "
"- must stop\n");
/* we better exit here becuase a public key is expected at
other places too. FIXME: Figure this out earlier and
don't get to here at all */
g10_exit (1);
}
BUG ();
}
merge_selfsigs_main ( keyblock, &revoked, &rinfo );
/* now merge in the data from each of the subkeys */
for(k=keyblock; k; k = k->next ) {
if ( k->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
merge_selfsigs_subkey ( keyblock, k );
}
}
main_pk = keyblock->pkt->pkt.public_key;
if ( revoked || main_pk->has_expired || !main_pk->is_valid ) {
/* if the primary key is revoked, expired, or invalid we
* better set the appropriate flags on that key and all
* subkeys */
for(k=keyblock; k; k = k->next ) {
if ( k->pkt->pkttype == PKT_PUBLIC_KEY
|| k->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
PKT_public_key *pk = k->pkt->pkt.public_key;
if(!main_pk->is_valid)
pk->is_valid = 0;
if(revoked && !pk->is_revoked)
{
pk->is_revoked = revoked;
memcpy(&pk->revoked,&rinfo,sizeof(rinfo));
}
if(main_pk->has_expired)
pk->has_expired = main_pk->has_expired;
}
}
return;
}
/* set the preference list of all keys to those of the primary real
* user ID. Note: we use these preferences when we don't know by
* which user ID the key has been selected.
* fixme: we should keep atoms of commonly used preferences or
* use reference counting to optimize the preference lists storage.
* FIXME: it might be better to use the intersection of
* all preferences.
* Do a similar thing for the MDC feature flag.
*/
prefs = NULL;
mdc_feature = 0;
for (k=keyblock; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY; k = k->next) {
if (k->pkt->pkttype == PKT_USER_ID
&& !k->pkt->pkt.user_id->attrib_data
&& k->pkt->pkt.user_id->is_primary) {
prefs = k->pkt->pkt.user_id->prefs;
mdc_feature = k->pkt->pkt.user_id->flags.mdc;
break;
}
}
for(k=keyblock; k; k = k->next ) {
if ( k->pkt->pkttype == PKT_PUBLIC_KEY
|| k->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
PKT_public_key *pk = k->pkt->pkt.public_key;
if (pk->prefs)
xfree (pk->prefs);
pk->prefs = copy_prefs (prefs);
pk->mdc_feature = mdc_feature;
}
}
}
/*
* Merge the secret keys from secblock into the pubblock thereby
* replacing the public (sub)keys with their secret counterparts Hmmm:
* It might be better to get away from the concept of entire secret
* keys at all and have a way to store just the real secret parts
* from the key.
*/
static void
merge_public_with_secret ( KBNODE pubblock, KBNODE secblock )
{
KBNODE pub;
assert ( pubblock->pkt->pkttype == PKT_PUBLIC_KEY );
assert ( secblock->pkt->pkttype == PKT_SECRET_KEY );
for (pub=pubblock; pub; pub = pub->next ) {
if ( pub->pkt->pkttype == PKT_PUBLIC_KEY ) {
PKT_public_key *pk = pub->pkt->pkt.public_key;
PKT_secret_key *sk = secblock->pkt->pkt.secret_key;
assert ( pub == pubblock ); /* only in the first node */
/* there is nothing to compare in this case, so just replace
* some information */
copy_public_parts_to_secret_key ( pk, sk );
free_public_key ( pk );
pub->pkt->pkttype = PKT_SECRET_KEY;
pub->pkt->pkt.secret_key = copy_secret_key (NULL, sk);
}
else if ( pub->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
KBNODE sec;
PKT_public_key *pk = pub->pkt->pkt.public_key;
/* this is more complicated: it may happen that the sequence
* of the subkeys dosn't match, so we have to find the
* appropriate secret key */
for (sec=secblock->next; sec; sec = sec->next ) {
if ( sec->pkt->pkttype == PKT_SECRET_SUBKEY ) {
PKT_secret_key *sk = sec->pkt->pkt.secret_key;
if ( !cmp_public_secret_key ( pk, sk ) ) {
copy_public_parts_to_secret_key ( pk, sk );
free_public_key ( pk );
pub->pkt->pkttype = PKT_SECRET_SUBKEY;
pub->pkt->pkt.secret_key = copy_secret_key (NULL, sk);
break;
}
}
}
if ( !sec )
BUG(); /* already checked in premerge */
}
}
}
/* This function checks that for every public subkey a corresponding
* secret subkey is available and deletes the public subkey otherwise.
* We need this function because we can't delete it later when we
* actually merge the secret parts into the pubring.
* The function also plays some games with the node flags.
*/
static void
premerge_public_with_secret ( KBNODE pubblock, KBNODE secblock )
{
KBNODE last, pub;
assert ( pubblock->pkt->pkttype == PKT_PUBLIC_KEY );
assert ( secblock->pkt->pkttype == PKT_SECRET_KEY );
for (pub=pubblock,last=NULL; pub; last = pub, pub = pub->next ) {
pub->flag &= ~3; /* reset bits 0 and 1 */
if ( pub->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
KBNODE sec;
PKT_public_key *pk = pub->pkt->pkt.public_key;
for (sec=secblock->next; sec; sec = sec->next ) {
if ( sec->pkt->pkttype == PKT_SECRET_SUBKEY ) {
PKT_secret_key *sk = sec->pkt->pkt.secret_key;
if ( !cmp_public_secret_key ( pk, sk ) ) {
if ( sk->protect.s2k.mode == 1001 ) {
/* The secret parts are not available so
we can't use that key for signing etc.
Fix the pubkey usage */
pk->pubkey_usage &= ~(PUBKEY_USAGE_SIG
|PUBKEY_USAGE_AUTH);
}
/* transfer flag bits 0 and 1 to the pubblock */
pub->flag |= (sec->flag &3);
break;
}
}
}
if ( !sec ) {
KBNODE next, ll;
if (opt.verbose)
log_info (_("no secret subkey"
" for public subkey %s - ignoring\n"),
keystr_from_pk (pk));
/* we have to remove the subkey in this case */
assert ( last );
/* find the next subkey */
for (next=pub->next,ll=pub;
next && next->pkt->pkttype != PKT_PUBLIC_SUBKEY;
ll = next, next = next->next )
;
/* make new link */
last->next = next;
/* release this public subkey with all sigs */
ll->next = NULL;
release_kbnode( pub );
/* let the loop continue */
pub = last;
}
}
}
/* We need to copy the found bits (0 and 1) from the secret key to
the public key. This has already been done for the subkeys but
got lost on the primary key - fix it here *. */
pubblock->flag |= (secblock->flag & 3);
}
/* See see whether the key fits
* our requirements and in case we do not
* request the primary key, we should select
* a suitable subkey.
* FIXME: Check against PGP 7 whether we still need a kludge
* to favor type 16 keys over type 20 keys when type 20
* has not been explitely requested.
* Returns: True when a suitable key has been found.
*
* We have to distinguish four cases: FIXME!
* 1. No usage and no primary key requested
* Examples for this case are that we have a keyID to be used
* for decrytion or verification.
* 2. No usage but primary key requested
* This is the case for all functions which work on an
* entire keyblock, e.g. for editing or listing
* 3. Usage and primary key requested
* FXME
* 4. Usage but no primary key requested
* FIXME
* FIXME: Tell what is going to happen here and something about the rationale
* Note: We don't use this function if no specific usage is requested;
* This way the getkey functions can be used for plain key listings.
*
* CTX ist the keyblock we are investigating, if FOUNDK is not NULL this
* is the key we actually found by looking at the keyid or a fingerprint and
* may eitehr point to the primary or one of the subkeys.
*/
static int
finish_lookup (GETKEY_CTX ctx)
{
KBNODE keyblock = ctx->keyblock;
KBNODE k;
KBNODE foundk = NULL;
PKT_user_id *foundu = NULL;
#define USAGE_MASK (PUBKEY_USAGE_SIG|PUBKEY_USAGE_ENC|PUBKEY_USAGE_CERT)
unsigned int req_usage = ( ctx->req_usage & USAGE_MASK );
/* Request the primary if we're certifying another key, and also
if signing data while --pgp6 or --pgp7 is on since pgp 6 and 7
do not understand signatures made by a signing subkey. PGP 8
does. */
int req_prim = (ctx->req_usage & PUBKEY_USAGE_CERT) ||
((PGP6 || PGP7) && (ctx->req_usage & PUBKEY_USAGE_SIG));
u32 latest_date;
KBNODE latest_key;
u32 curtime = make_timestamp ();
assert( keyblock->pkt->pkttype == PKT_PUBLIC_KEY );
ctx->found_key = NULL;
if (ctx->exact) {
for (k=keyblock; k; k = k->next) {
if ( (k->flag & 1) ) {
assert ( k->pkt->pkttype == PKT_PUBLIC_KEY
|| k->pkt->pkttype == PKT_PUBLIC_SUBKEY );
foundk = k;
break;
}
}
}
for (k=keyblock; k; k = k->next) {
if ( (k->flag & 2) ) {
assert (k->pkt->pkttype == PKT_USER_ID);
foundu = k->pkt->pkt.user_id;
break;
}
}
if ( DBG_CACHE )
log_debug( "finish_lookup: checking key %08lX (%s)(req_usage=%x)\n",
(ulong)keyid_from_pk( keyblock->pkt->pkt.public_key, NULL),
foundk? "one":"all", req_usage);
if (!req_usage) {
latest_key = foundk? foundk:keyblock;
goto found;
}
latest_date = 0;
latest_key = NULL;
/* do not look at subkeys if a certification key is requested */
if ((!foundk || foundk->pkt->pkttype == PKT_PUBLIC_SUBKEY) && !req_prim) {
KBNODE nextk;
/* either start a loop or check just this one subkey */
for (k=foundk?foundk:keyblock; k; k = nextk ) {
PKT_public_key *pk;
nextk = k->next;
if ( k->pkt->pkttype != PKT_PUBLIC_SUBKEY )
continue;
if ( foundk )
nextk = NULL; /* what a hack */
pk = k->pkt->pkt.public_key;
if (DBG_CACHE)
log_debug( "\tchecking subkey %08lX\n",
(ulong)keyid_from_pk( pk, NULL));
if ( !pk->is_valid ) {
if (DBG_CACHE)
log_debug( "\tsubkey not valid\n");
continue;
}
if ( pk->is_revoked ) {
if (DBG_CACHE)
log_debug( "\tsubkey has been revoked\n");
continue;
}
if ( pk->has_expired ) {
if (DBG_CACHE)
log_debug( "\tsubkey has expired\n");
continue;
}
if ( pk->timestamp > curtime && !opt.ignore_valid_from ) {
if (DBG_CACHE)
log_debug( "\tsubkey not yet valid\n");
continue;
}
if ( !((pk->pubkey_usage&USAGE_MASK) & req_usage) ) {
if (DBG_CACHE)
log_debug( "\tusage does not match: want=%x have=%x\n",
req_usage, pk->pubkey_usage );
continue;
}
if (DBG_CACHE)
log_debug( "\tsubkey looks fine\n");
if ( pk->timestamp > latest_date ) {
latest_date = pk->timestamp;
latest_key = k;
}
}
}
/* Okay now try the primary key unless we want an exact
* key ID match on a subkey */
if ((!latest_key && !(ctx->exact && foundk != keyblock)) || req_prim) {
PKT_public_key *pk;
if (DBG_CACHE && !foundk && !req_prim )
log_debug( "\tno suitable subkeys found - trying primary\n");
pk = keyblock->pkt->pkt.public_key;
if ( !pk->is_valid ) {
if (DBG_CACHE)
log_debug( "\tprimary key not valid\n");
}
else if ( pk->is_revoked ) {
if (DBG_CACHE)
log_debug( "\tprimary key has been revoked\n");
}
else if ( pk->has_expired ) {
if (DBG_CACHE)
log_debug( "\tprimary key has expired\n");
}
else if ( !((pk->pubkey_usage&USAGE_MASK) & req_usage) ) {
if (DBG_CACHE)
log_debug( "\tprimary key usage does not match: "
"want=%x have=%x\n",
req_usage, pk->pubkey_usage );
}
else { /* okay */
if (DBG_CACHE)
log_debug( "\tprimary key may be used\n");
latest_key = keyblock;
latest_date = pk->timestamp;
}
}
if ( !latest_key ) {
if (DBG_CACHE)
log_debug("\tno suitable key found - giving up\n");
return 0;
}
found:
if (DBG_CACHE)
log_debug( "\tusing key %08lX\n",
(ulong)keyid_from_pk( latest_key->pkt->pkt.public_key, NULL) );
if (latest_key) {
PKT_public_key *pk = latest_key->pkt->pkt.public_key;
if (pk->user_id)
free_user_id (pk->user_id);
pk->user_id = scopy_user_id (foundu);
}
ctx->found_key = latest_key;
if (latest_key != keyblock && opt.verbose)
{
char *tempkeystr=
xstrdup(keystr_from_pk(latest_key->pkt->pkt.public_key));
log_info(_("using subkey %s instead of primary key %s\n"),
tempkeystr, keystr_from_pk(keyblock->pkt->pkt.public_key));
xfree(tempkeystr);
}
cache_user_id( keyblock );
return 1; /* found */
}
static int
lookup( GETKEY_CTX ctx, KBNODE *ret_keyblock, int secmode )
{
int rc;
KBNODE secblock = NULL; /* helper */
int no_suitable_key = 0;
rc = 0;
while (!(rc = keydb_search (ctx->kr_handle, ctx->items, ctx->nitems))) {
/* If we are searching for the first key we have to make sure
that the next interation does not no an implicit reset.
This can be triggered by an empty key ring. */
if (ctx->nitems && ctx->items->mode == KEYDB_SEARCH_MODE_FIRST)
ctx->items->mode = KEYDB_SEARCH_MODE_NEXT;
rc = keydb_get_keyblock (ctx->kr_handle, &ctx->keyblock);
if (rc) {
log_error ("keydb_get_keyblock failed: %s\n", g10_errstr(rc));
rc = 0;
goto skip;
}
if ( secmode ) {
/* find the correspondig public key and use this
* this one for the selection process */
u32 aki[2];
KBNODE k = ctx->keyblock;
if (k->pkt->pkttype != PKT_SECRET_KEY)
BUG();
keyid_from_sk (k->pkt->pkt.secret_key, aki);
k = get_pubkeyblock (aki);
if( !k )
{
if (!opt.quiet)
log_info(_("key %s: secret key without public key"
" - skipped\n"), keystr(aki));
goto skip;
}
secblock = ctx->keyblock;
ctx->keyblock = k;
premerge_public_with_secret ( ctx->keyblock, secblock );
}
/* warning: node flag bits 0 and 1 should be preserved by
* merge_selfsigs. For secret keys, premerge did tranfer the
* keys to the keyblock */
merge_selfsigs ( ctx->keyblock );
if ( finish_lookup (ctx) ) {
no_suitable_key = 0;
if ( secmode ) {
merge_public_with_secret ( ctx->keyblock,
secblock);
release_kbnode (secblock);
secblock = NULL;
}
goto found;
}
else
no_suitable_key = 1;
skip:
/* release resources and continue search */
if ( secmode ) {
release_kbnode( secblock );
secblock = NULL;
}
release_kbnode( ctx->keyblock );
ctx->keyblock = NULL;
}
found:
if( rc && rc != -1 )
log_error("keydb_search failed: %s\n", g10_errstr(rc));
if( !rc ) {
*ret_keyblock = ctx->keyblock; /* return the keyblock */
ctx->keyblock = NULL;
}
else if (rc == -1 && no_suitable_key)
rc = secmode ? G10ERR_UNU_SECKEY : G10ERR_UNU_PUBKEY;
else if( rc == -1 )
rc = secmode ? G10ERR_NO_SECKEY : G10ERR_NO_PUBKEY;
if ( secmode ) {
release_kbnode( secblock );
secblock = NULL;
}
release_kbnode( ctx->keyblock );
ctx->keyblock = NULL;
ctx->last_rc = rc;
return rc;
}
/****************
* FIXME: Replace by the generic function
* It does not work as it is right now - it is used at
* 2 places: a) to get the key for an anonyous recipient
* b) to get the ultimately trusted keys.
* The a) usage might have some problems.
*
* set with_subkeys true to include subkeys
* set with_spm true to include secret-parts-missing keys
*
* Enumerate all primary secret keys. Caller must use these procedure:
* 1) create a void pointer and initialize it to NULL
* 2) pass this void pointer by reference to this function
* and provide space for the secret key (pass a buffer for sk)
* 3) call this function as long as it does not return -1
* to indicate EOF.
* 4) Always call this function a last time with SK set to NULL,
* so that can free it's context.
*/
int
enum_secret_keys( void **context, PKT_secret_key *sk,
int with_subkeys, int with_spm )
{
int rc=0;
struct {
int eof;
int first;
KEYDB_HANDLE hd;
KBNODE keyblock;
KBNODE node;
} *c = *context;
if( !c ) { /* make a new context */
c = xmalloc_clear( sizeof *c );
*context = c;
c->hd = keydb_new (1);
c->first = 1;
c->keyblock = NULL;
c->node = NULL;
}
if( !sk ) { /* free the context */
keydb_release (c->hd);
release_kbnode (c->keyblock);
xfree( c );
*context = NULL;
return 0;
}
if( c->eof )
return -1;
do {
/* get the next secret key from the current keyblock */
for (; c->node; c->node = c->node->next) {
if ((c->node->pkt->pkttype == PKT_SECRET_KEY
|| (with_subkeys
&& c->node->pkt->pkttype == PKT_SECRET_SUBKEY) )
&& !(c->node->pkt->pkt.secret_key->protect.s2k.mode==1001
&& !with_spm)) {
copy_secret_key (sk, c->node->pkt->pkt.secret_key );
c->node = c->node->next;
return 0; /* found */
}
}
release_kbnode (c->keyblock);
c->keyblock = c->node = NULL;
rc = c->first? keydb_search_first (c->hd) : keydb_search_next (c->hd);
c->first = 0;
if (rc) {
keydb_release (c->hd); c->hd = NULL;
c->eof = 1;
return -1; /* eof */
}
rc = keydb_get_keyblock (c->hd, &c->keyblock);
c->node = c->keyblock;
} while (!rc);
return rc; /* error */
}
/*********************************************
*********** user ID printing helpers *******
*********************************************/
/****************
* Return a string with a printable representation of the user_id.
* this string must be freed by xfree.
*/
char*
get_user_id_string( u32 *keyid )
{
user_id_db_t r;
char *p;
int pass=0;
/* try it two times; second pass reads from key resources */
do
{
for(r=user_id_db; r; r = r->next )
{
keyid_list_t a;
for (a=r->keyids; a; a= a->next )
{
if( a->keyid[0] == keyid[0] && a->keyid[1] == keyid[1] )
{
p = xmalloc( keystrlen() + 1 + r->len + 1 );
sprintf(p, "%s %.*s", keystr(keyid), r->len, r->name );
return p;
}
}
}
} while( ++pass < 2 && !get_pubkey( NULL, keyid ) );
p = xmalloc( keystrlen() + 5 );
sprintf(p, "%s [?]", keystr(keyid));
return p;
}
char*
get_user_id_string_native ( u32 *keyid )
{
char *p = get_user_id_string( keyid );
char *p2 = utf8_to_native( p, strlen(p), 0 );
xfree(p);
return p2;
}
char*
get_long_user_id_string( u32 *keyid )
{
user_id_db_t r;
char *p;
int pass=0;
/* try it two times; second pass reads from key resources */
do {
for(r=user_id_db; r; r = r->next ) {
keyid_list_t a;
for (a=r->keyids; a; a= a->next ) {
if( a->keyid[0] == keyid[0] && a->keyid[1] == keyid[1] ) {
p = xmalloc( r->len + 20 );
sprintf(p, "%08lX%08lX %.*s",
(ulong)keyid[0], (ulong)keyid[1],
r->len, r->name );
return p;
}
}
}
} while( ++pass < 2 && !get_pubkey( NULL, keyid ) );
p = xmalloc( 25 );
sprintf(p, "%08lX%08lX [?]", (ulong)keyid[0], (ulong)keyid[1] );
return p;
}
char*
get_user_id( u32 *keyid, size_t *rn )
{
user_id_db_t r;
char *p;
int pass=0;
/* try it two times; second pass reads from key resources */
do {
for(r=user_id_db; r; r = r->next ) {
keyid_list_t a;
for (a=r->keyids; a; a= a->next ) {
if( a->keyid[0] == keyid[0] && a->keyid[1] == keyid[1] ) {
p = xmalloc( r->len );
memcpy(p, r->name, r->len );
*rn = r->len;
return p;
}
}
}
} while( ++pass < 2 && !get_pubkey( NULL, keyid ) );
p = xstrdup( user_id_not_found_utf8 () );
*rn = strlen(p);
return p;
}
char*
get_user_id_native( u32 *keyid )
{
size_t rn;
char *p = get_user_id( keyid, &rn );
char *p2 = utf8_to_native( p, rn, 0 );
xfree(p);
return p2;
}
KEYDB_HANDLE
get_ctx_handle(GETKEY_CTX ctx)
{
return ctx->kr_handle;
}
static void
free_akl(struct akl *akl)
{
if(akl->spec)
free_keyserver_spec(akl->spec);
xfree(akl);
}
void
release_akl(void)
{
while(opt.auto_key_locate)
{
struct akl *akl2=opt.auto_key_locate;
opt.auto_key_locate=opt.auto_key_locate->next;
free_akl(akl2);
}
}
int
parse_auto_key_locate(char *options)
{
char *tok;
while((tok=optsep(&options)))
{
struct akl *akl,*check,*last=NULL;
int dupe=0;
if(tok[0]=='\0')
continue;
/* For now we silently ignore the new methods introduced with
2.0.10. */
if (!ascii_strcasecmp (tok,"nodefault")
|| !ascii_strcasecmp (tok,"local"))
continue;
akl=xmalloc_clear(sizeof(*akl));
if(ascii_strcasecmp(tok,"ldap")==0)
akl->type=AKL_LDAP;
else if(ascii_strcasecmp(tok,"keyserver")==0)
akl->type=AKL_KEYSERVER;
#ifdef USE_DNS_CERT
else if(ascii_strcasecmp(tok,"cert")==0)
akl->type=AKL_CERT;
#endif
#ifdef USE_DNS_PKA
else if(ascii_strcasecmp(tok,"pka")==0)
akl->type=AKL_PKA;
#endif
else if((akl->spec=parse_keyserver_uri(tok,1,NULL,0)))
akl->type=AKL_SPEC;
else
{
free_akl(akl);
return 0;
}
/* We must maintain the order the user gave us */
for(check=opt.auto_key_locate;check;last=check,check=check->next)
{
/* Check for duplicates */
if(check->type==akl->type
&& (akl->type!=AKL_SPEC
|| (akl->type==AKL_SPEC
&& strcmp(check->spec->uri,akl->spec->uri)==0)))
{
dupe=1;
free_akl(akl);
break;
}
}
if(!dupe)
{
if(last)
last->next=akl;
else
opt.auto_key_locate=akl;
}
}
return 1;
}
diff --git a/include/cipher.h b/include/cipher.h
index a69c6b38d..dcc304521 100644
--- a/include/cipher.h
+++ b/include/cipher.h
@@ -1,215 +1,216 @@
/* cipher.h
* Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007,
* 2008 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef G10_CIPHER_H
#define G10_CIPHER_H
#define DBG_CIPHER g10c_debug_mode
#include "mpi.h"
#include "../cipher/random.h"
#define CIPHER_ALGO_NONE 0
#define CIPHER_ALGO_IDEA 1
#define CIPHER_ALGO_3DES 2
#define CIPHER_ALGO_CAST5 3
#define CIPHER_ALGO_BLOWFISH 4 /* blowfish 128 bit key */
/* 5 & 6 are reserved */
#define CIPHER_ALGO_AES 7
#define CIPHER_ALGO_AES192 8
#define CIPHER_ALGO_AES256 9
#define CIPHER_ALGO_TWOFISH 10 /* twofish 256 bit */
#define CIPHER_ALGO_CAMELLIA128 11
#define CIPHER_ALGO_CAMELLIA192 12
#define CIPHER_ALGO_CAMELLIA256 13
#define CIPHER_ALGO_DUMMY 110 /* no encryption at all */
#define PUBKEY_ALGO_RSA 1
#define PUBKEY_ALGO_RSA_E 2 /* RSA encrypt only */
#define PUBKEY_ALGO_RSA_S 3 /* RSA sign only */
#define PUBKEY_ALGO_ELGAMAL_E 16 /* encrypt only ElGamal (but not for v3)*/
#define PUBKEY_ALGO_DSA 17
#define PUBKEY_ALGO_ECDH 18
#define PUBKEY_ALGO_ECDSA 19
#define PUBKEY_ALGO_ELGAMAL 20 /* sign and encrypt elgamal */
#define PUBKEY_ALGO_ECC 22 /* Generic ECC. */
#define PUBKEY_USAGE_SIG 1 /* key is good for signatures */
#define PUBKEY_USAGE_ENC 2 /* key is good for encryption */
#define PUBKEY_USAGE_CERT 4 /* key is also good to certify other keys*/
#define PUBKEY_USAGE_AUTH 8 /* key is good for authentication */
#define PUBKEY_USAGE_UNKNOWN 128 /* key has an unknown usage bit */
+#define PUBKEY_USAGE_NONE 256 /* No usage given. */
#define DIGEST_ALGO_MD5 1
#define DIGEST_ALGO_SHA1 2
#define DIGEST_ALGO_RMD160 3
/* 4, 5, 6, and 7 are reserved */
#define DIGEST_ALGO_SHA256 8
#define DIGEST_ALGO_SHA384 9
#define DIGEST_ALGO_SHA512 10
#define DIGEST_ALGO_SHA224 11
#define COMPRESS_ALGO_NONE 0
#define COMPRESS_ALGO_ZIP 1
#define COMPRESS_ALGO_ZLIB 2
#define COMPRESS_ALGO_BZIP2 3
#define is_RSA(a) ((a)==PUBKEY_ALGO_RSA || (a)==PUBKEY_ALGO_RSA_E \
|| (a)==PUBKEY_ALGO_RSA_S )
#define is_ELGAMAL(a) ((a)==PUBKEY_ALGO_ELGAMAL_E)
#define is_DSA(a) ((a)==PUBKEY_ALGO_DSA)
typedef struct
{
int algo;
int keylen;
int algo_info_printed;
int use_mdc;
int symmetric;
byte key[32]; /* this is the largest used keylen (256 bit) */
} DEK;
struct cipher_handle_s;
typedef struct cipher_handle_s *CIPHER_HANDLE;
#define CIPHER_MODE_ECB 1
#define CIPHER_MODE_CFB 2
#define CIPHER_MODE_PHILS_CFB 3
#define CIPHER_MODE_AUTO_CFB 4
#define CIPHER_MODE_DUMMY 5 /* used with algo DUMMY for no encryption */
#define CIPHER_MODE_CBC 6
struct md_digest_list_s;
struct gcry_md_context {
int secure;
FILE *debug;
int finalized;
struct md_digest_list_s *list;
int bufcount;
int bufsize;
byte buffer[1];
};
typedef struct gcry_md_context *MD_HANDLE;
#ifndef EXTERN_UNLESS_MAIN_MODULE
#if defined (__riscos__) && !defined (INCLUDED_BY_MAIN_MODULE)
#define EXTERN_UNLESS_MAIN_MODULE extern
#else
#define EXTERN_UNLESS_MAIN_MODULE
#endif
#endif
EXTERN_UNLESS_MAIN_MODULE int g10c_debug_mode;
EXTERN_UNLESS_MAIN_MODULE int g10_opt_verbose;
EXTERN_UNLESS_MAIN_MODULE const char *g10_opt_homedir;
/*-- dynload.c --*/
void register_cipher_extension( const char *mainpgm, const char *fname );
/*-- md.c --*/
int string_to_digest_algo( const char *string );
const char * digest_algo_to_string( int algo );
int check_digest_algo( int algo );
MD_HANDLE md_open( int algo, int secure );
void md_enable( MD_HANDLE hd, int algo );
MD_HANDLE md_copy( MD_HANDLE a );
void md_reset( MD_HANDLE a );
void md_close(MD_HANDLE a);
void md_write( MD_HANDLE a, const byte *inbuf, size_t inlen);
void md_final(MD_HANDLE a);
byte *md_read( MD_HANDLE a, int algo );
int md_digest( MD_HANDLE a, int algo, byte *buffer, int buflen );
int md_get_algo( MD_HANDLE a );
int md_algo_present( MD_HANDLE a, int algo );
int md_digest_length( int algo );
const byte *md_asn_oid( int algo, size_t *asnlen, size_t *mdlen );
void md_start_debug( MD_HANDLE a, const char *suffix );
void md_stop_debug( MD_HANDLE a );
#define md_is_secure(a) ((a)->secure)
#define md_putc(h,c) \
do { \
if( (h)->bufcount == (h)->bufsize ) \
md_write( (h), NULL, 0 ); \
(h)->buffer[(h)->bufcount++] = (c) & 0xff; \
} while(0)
void rmd160_hash_buffer (char *outbuf, const char *buffer, size_t length);
/*-- cipher.c --*/
int string_to_cipher_algo( const char *string );
const char * cipher_algo_to_string( int algo );
void disable_cipher_algo( int algo );
int check_cipher_algo( int algo );
unsigned cipher_get_keylen( int algo );
unsigned cipher_get_blocksize( int algo );
CIPHER_HANDLE cipher_open( int algo, int mode, int secure );
void cipher_close( CIPHER_HANDLE c );
int cipher_setkey( CIPHER_HANDLE c, byte *key, unsigned keylen );
void cipher_setiv( CIPHER_HANDLE c, const byte *iv, unsigned ivlen );
void cipher_encrypt( CIPHER_HANDLE c, byte *out, byte *in, unsigned nbytes );
void cipher_decrypt( CIPHER_HANDLE c, byte *out, byte *in, unsigned nbytes );
void cipher_sync( CIPHER_HANDLE c );
/*-- pubkey.c --*/
#define PUBKEY_MAX_NPKEY 4
#define PUBKEY_MAX_NSKEY 6
#define PUBKEY_MAX_NSIG 2
#define PUBKEY_MAX_NENC 2
int string_to_pubkey_algo( const char *string );
const char * pubkey_algo_to_string( int algo );
void disable_pubkey_algo( int algo );
int check_pubkey_algo( int algo );
int check_pubkey_algo2( int algo, unsigned use );
int pubkey_get_npkey( int algo );
int pubkey_get_nskey( int algo );
int pubkey_get_nsig( int algo );
int pubkey_get_nenc( int algo );
unsigned pubkey_nbits( int algo, MPI *pkey );
int pubkey_generate( int algo, unsigned nbits, MPI *skey, MPI **retfactors );
int dsa2_generate( int algo, unsigned nbits, unsigned qbits,
MPI *skey, MPI **retfactors );
int pubkey_check_secret_key( int algo, MPI *skey );
int pubkey_encrypt( int algo, MPI *resarr, MPI data, MPI *pkey );
int pubkey_decrypt( int algo, MPI *result, MPI *data, MPI *skey );
int pubkey_sign( int algo, MPI *resarr, MPI hash, MPI *skey );
int pubkey_verify( int algo, MPI hash, MPI *data, MPI *pkey );
/*-- smallprime.c --*/
extern ushort small_prime_numbers[];
/*-- primegen.c --*/
void register_primegen_progress ( void (*cb)( void *, int), void *cb_data );
MPI generate_secret_prime( unsigned nbits );
MPI generate_public_prime( unsigned nbits );
MPI generate_elg_prime( int mode, unsigned pbits, unsigned qbits,
MPI g, MPI **factors );
/*-- elsewhere --*/
void register_pk_dsa_progress ( void (*cb)( void *, int), void *cb_data );
void register_pk_elg_progress ( void (*cb)( void *, int), void *cb_data );
#endif /*G10_CIPHER_H*/

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