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gpg: Avoid using cached MD5 signature status.

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* g10/sig-check.c (check_key_signature2): Avoid using a cached MD5
signature status.
* g10/keyring.c (keyring_get_keyblock): Ditto.
(write_keyblock): Ditto.

* g10/sig-check.c (do_check): Move reject warning to ...
* g10/misc.c (print_md5_rejected_note): new.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2014-10-11 19:41:51 +02:00
parent f952fe8c6d
commit 9112fed78b
4 changed files with 145 additions and 125 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

230
g10/keyring.c
View File

@ -31,7 +31,7 @@
#include "util.h"
#include "keyring.h"
#include "packet.h"
#include "keydb.h"
#include "keydb.h"
#include "options.h"
#include "main.h" /*for check_key_signature()*/
#include "i18n.h"
@ -46,11 +46,11 @@ struct off_item {
/*off_t off;*/
};
typedef struct off_item **OffsetHashTable;
typedef struct off_item **OffsetHashTable;
typedef struct keyring_name *KR_NAME;
struct keyring_name
struct keyring_name
{
struct keyring_name *next;
int secret;
@ -79,7 +79,7 @@ struct keyring_handle {
int error;
} current;
struct {
CONST_KR_NAME kr;
CONST_KR_NAME kr;
off_t offset;
size_t pk_no;
size_t uid_no;
@ -102,7 +102,7 @@ static struct off_item *
new_offset_item (void)
{
struct off_item *k;
k = xmalloc_clear (sizeof *k);
return k;
}
@ -121,7 +121,7 @@ release_offset_items (struct off_item *k)
}
#endif
static OffsetHashTable
static OffsetHashTable
new_offset_hash_table (void)
{
struct off_item **tbl;
@ -164,7 +164,7 @@ update_offset_hash_table (OffsetHashTable tbl, u32 *kid, off_t off)
for (k = tbl[(kid[1] & 0x07ff)]; k; k = k->next)
{
if (k->kid[0] == kid[0] && k->kid[1] == kid[1])
if (k->kid[0] == kid[0] && k->kid[1] == kid[1])
{
/*k->off = off;*/
return;
@ -194,14 +194,14 @@ update_offset_hash_table_from_kb (OffsetHashTable tbl, KBNODE node, off_t off)
}
}
/*
/*
* Register a filename for plain keyring files. ptr is set to a
* pointer to be used to create a handles etc, or the already-issued
* pointer if it has already been registered. The function returns 1
* if a new keyring was registered.
*/
int
keyring_register_filename (const char *fname, int secret, int readonly,
keyring_register_filename (const char *fname, int secret, int readonly,
void **ptr)
{
KR_NAME kr;
@ -217,7 +217,7 @@ keyring_register_filename (const char *fname, int secret, int readonly,
if (readonly)
kr->readonly = 1;
*ptr=kr;
return 0;
return 0;
}
}
@ -251,12 +251,12 @@ keyring_is_writable (void *token)
return r? (r->readonly || !access (r->fname, W_OK)) : 0;
}
/* Create a new handle for the resource associated with TOKEN. SECRET
is just just as a cross-check.
The returned handle must be released using keyring_release (). */
KEYRING_HANDLE
keyring_new (void *token, int secret)
@ -265,7 +265,7 @@ keyring_new (void *token, int secret)
KR_NAME resource = token;
assert (resource && !resource->secret == !secret);
hd = xmalloc_clear (sizeof *hd);
hd->resource = resource;
hd->secret = !!secret;
@ -273,7 +273,7 @@ keyring_new (void *token, int secret)
return hd;
}
void
void
keyring_release (KEYRING_HANDLE hd)
{
if (!hd)
@ -300,7 +300,7 @@ keyring_get_resource_name (KEYRING_HANDLE hd)
* Lock the keyring with the given handle, or unlock if YES is false.
* We ignore the handle and lock all registered files.
*/
int
int
keyring_lock (KEYRING_HANDLE hd, int yes)
{
KR_NAME kr;
@ -323,7 +323,7 @@ keyring_lock (KEYRING_HANDLE hd, int yes)
}
if (rc)
return rc;
/* and now set the locks */
for (kr=kr_names; kr; kr = kr->next) {
if (!keyring_is_writable(kr))
@ -334,7 +334,7 @@ keyring_lock (KEYRING_HANDLE hd, int yes)
log_info ("can't lock `%s'\n", kr->fname );
rc = G10ERR_GENERAL;
}
else
else
kr->is_locked = 1;
}
}
@ -347,10 +347,10 @@ keyring_lock (KEYRING_HANDLE hd, int yes)
;
else if (release_dotlock (kr->lockhd))
log_info ("can't unlock `%s'\n", kr->fname );
else
else
kr->is_locked = 0;
}
}
}
return rc;
}
@ -360,7 +360,7 @@ keyring_lock (KEYRING_HANDLE hd, int yes)
/*
* Return the last found keyring. Caller must free it.
* The returned keyblock has the kbode flag bit 0 set for the node with
* the public key used to locate the keyblock or flag bit 1 set for
* the public key used to locate the keyblock or flag bit 1 set for
* the user ID node.
*/
int
@ -406,7 +406,7 @@ keyring_get_keyblock (KEYRING_HANDLE hd, KBNODE *ret_kb)
init_packet (pkt);
continue;
}
if (rc) {
if (rc) {
log_error ("keyring_get_keyblock: read error: %s\n",
g10_errstr(rc) );
rc = G10ERR_INV_KEYRING;
@ -426,19 +426,26 @@ keyring_get_keyblock (KEYRING_HANDLE hd, KBNODE *ret_kb)
}
in_cert = 1;
if (pkt->pkttype == PKT_RING_TRUST)
if (pkt->pkttype == PKT_RING_TRUST)
{
/*(this code is duplicated after the loop)*/
if ( lastnode
if ( lastnode
&& lastnode->pkt->pkttype == PKT_SIGNATURE
&& (pkt->pkt.ring_trust->sigcache & 1) ) {
/* This is a ring trust packet with a checked signature
/* This is a ring trust packet with a checked signature
* status cache following directly a signature paket.
* Set the cache status into that signature packet. */
* Set the cache status into that signature packet.
*
* We do not use cached signatures made with MD5 to
* avoid using a cached status created with an older
* version of gpg. */
PKT_signature *sig = lastnode->pkt->pkt.signature;
sig->flags.checked = 1;
sig->flags.valid = !!(pkt->pkt.ring_trust->sigcache & 2);
if (sig->digest_algo != DIGEST_ALGO_MD5)
{
sig->flags.checked = 1;
sig->flags.valid = !!(pkt->pkt.ring_trust->sigcache & 2);
}
}
/* Reset LASTNODE, so that we set the cache status only from
* the ring trust packet immediately following a signature. */
@ -468,7 +475,7 @@ keyring_get_keyblock (KEYRING_HANDLE hd, KBNODE *ret_kb)
if (++uid_no == hd->found.uid_no)
node->flag |= 2;
break;
default:
break;
}
@ -478,7 +485,7 @@ keyring_get_keyblock (KEYRING_HANDLE hd, KBNODE *ret_kb)
}
set_packet_list_mode(save_mode);
if (rc == -1 && keyblock)
if (rc == -1 && keyblock)
rc = 0; /* got the entire keyblock */
if (rc || !ret_kb)
@ -486,12 +493,15 @@ keyring_get_keyblock (KEYRING_HANDLE hd, KBNODE *ret_kb)
else {
/*(duplicated form the loop body)*/
if ( pkt && pkt->pkttype == PKT_RING_TRUST
&& lastnode
&& lastnode
&& lastnode->pkt->pkttype == PKT_SIGNATURE
&& (pkt->pkt.ring_trust->sigcache & 1) ) {
PKT_signature *sig = lastnode->pkt->pkt.signature;
sig->flags.checked = 1;
sig->flags.valid = !!(pkt->pkt.ring_trust->sigcache & 2);
if (sig->digest_algo != DIGEST_ALGO_MD5)
{
sig->flags.checked = 1;
sig->flags.valid = !!(pkt->pkt.ring_trust->sigcache & 2);
}
}
*ret_kb = keyblock;
}
@ -500,7 +510,7 @@ keyring_get_keyblock (KEYRING_HANDLE hd, KBNODE *ret_kb)
iobuf_close(a);
/* Make sure that future search operations fail immediately when
* we know that we are working on a invalid keyring
* we know that we are working on a invalid keyring
*/
if (rc == G10ERR_INV_KEYRING)
hd->current.error = rc;
@ -571,11 +581,11 @@ keyring_insert_keyblock (KEYRING_HANDLE hd, KBNODE kb)
if (hd->current.kr->readonly)
return gpg_error (GPG_ERR_EACCES);
}
else
else
fname = hd->resource? hd->resource->fname:NULL;
if (!fname)
return G10ERR_GENERAL;
return G10ERR_GENERAL;
/* Close this one otherwise we will lose the position for
* a next search. Fixme: it would be better to adjust the position
@ -590,7 +600,7 @@ keyring_insert_keyblock (KEYRING_HANDLE hd, KBNODE kb)
{
update_offset_hash_table_from_kb (kr_offtbl, kb, 0);
}
return rc;
}
@ -639,10 +649,10 @@ keyring_delete_keyblock (KEYRING_HANDLE hd)
/*
/*
* Start the next search on this handle right at the beginning
*/
int
int
keyring_search_reset (KEYRING_HANDLE hd)
{
assert (hd);
@ -652,17 +662,17 @@ keyring_search_reset (KEYRING_HANDLE hd)
hd->current.iobuf = NULL;
hd->current.eof = 0;
hd->current.error = 0;
hd->found.kr = NULL;
hd->found.offset = 0;
return 0;
return 0;
}
static int
prepare_search (KEYRING_HANDLE hd)
{
if (hd->current.error)
if (hd->current.error)
return hd->current.error; /* still in error state */
if (hd->current.kr && !hd->current.eof) {
@ -671,7 +681,7 @@ prepare_search (KEYRING_HANDLE hd)
return 0; /* okay */
}
if (!hd->current.kr && hd->current.eof)
if (!hd->current.kr && hd->current.eof)
return -1; /* still EOF */
if (!hd->current.kr) { /* start search with first keyring */
@ -683,7 +693,7 @@ prepare_search (KEYRING_HANDLE hd)
assert (!hd->current.iobuf);
}
else { /* EOF */
iobuf_close (hd->current.iobuf);
iobuf_close (hd->current.iobuf);
hd->current.iobuf = NULL;
hd->current.kr = NULL;
hd->current.eof = 1;
@ -841,7 +851,7 @@ compare_name (int mode, const char *name, const char *uid, size_t uidlen)
int i;
const char *s, *se;
if (mode == KEYDB_SEARCH_MODE_EXACT) {
if (mode == KEYDB_SEARCH_MODE_EXACT) {
for (i=0; name[i] && uidlen; i++, uidlen--)
if (uid[i] != name[i])
break;
@ -852,7 +862,7 @@ compare_name (int mode, const char *name, const char *uid, size_t uidlen)
if (ascii_memistr( uid, uidlen, name ))
return 0;
}
else if ( mode == KEYDB_SEARCH_MODE_MAIL
else if ( mode == KEYDB_SEARCH_MODE_MAIL
|| mode == KEYDB_SEARCH_MODE_MAILSUB
|| mode == KEYDB_SEARCH_MODE_MAILEND) {
for (i=0, s= uid; i < uidlen && *s != '<'; s++, i++)
@ -864,7 +874,7 @@ compare_name (int mode, const char *name, const char *uid, size_t uidlen)
;
if (i < uidlen) {
i = se - s;
if (mode == KEYDB_SEARCH_MODE_MAIL) {
if (mode == KEYDB_SEARCH_MODE_MAIL) {
if( strlen(name)-2 == i
&& !ascii_memcasecmp( s, name+1, i) )
return 0;
@ -888,11 +898,11 @@ compare_name (int mode, const char *name, const char *uid, size_t uidlen)
}
/*
/*
* Search through the keyring(s), starting at the current position,
* for a keyblock which contains one of the keys described in the DESC array.
*/
int
int
keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
size_t ndesc, size_t *descindex)
{
@ -912,28 +922,28 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
/* figure out what information we need */
need_uid = need_words = need_keyid = need_fpr = any_skip = 0;
for (n=0; n < ndesc; n++)
for (n=0; n < ndesc; n++)
{
switch (desc[n].mode)
switch (desc[n].mode)
{
case KEYDB_SEARCH_MODE_EXACT:
case KEYDB_SEARCH_MODE_EXACT:
case KEYDB_SEARCH_MODE_SUBSTR:
case KEYDB_SEARCH_MODE_MAIL:
case KEYDB_SEARCH_MODE_MAILSUB:
case KEYDB_SEARCH_MODE_MAILEND:
need_uid = 1;
break;
case KEYDB_SEARCH_MODE_WORDS:
case KEYDB_SEARCH_MODE_WORDS:
need_uid = 1;
need_words = 1;
break;
case KEYDB_SEARCH_MODE_SHORT_KID:
case KEYDB_SEARCH_MODE_SHORT_KID:
case KEYDB_SEARCH_MODE_LONG_KID:
need_keyid = 1;
break;
case KEYDB_SEARCH_MODE_FPR16:
case KEYDB_SEARCH_MODE_FPR16:
case KEYDB_SEARCH_MODE_FPR20:
case KEYDB_SEARCH_MODE_FPR:
case KEYDB_SEARCH_MODE_FPR:
need_fpr = 1;
break;
case KEYDB_SEARCH_MODE_FIRST:
@ -942,7 +952,7 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
break;
default: break;
}
if (desc[n].skipfnc)
if (desc[n].skipfnc)
{
any_skip = 1;
need_keyid = 1;
@ -961,7 +971,7 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
else if (ndesc == 1 && desc[0].mode == KEYDB_SEARCH_MODE_LONG_KID)
{
struct off_item *oi;
oi = lookup_offset_hash_table (kr_offtbl, desc[0].u.kid);
if (!oi)
{ /* We know that we don't have this key */
@ -970,9 +980,9 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
return -1;
}
/* We could now create a positive search status and return.
* However the problem is that another instance of gpg may
* However the problem is that another instance of gpg may
* have changed the keyring so that the offsets are not valid
* anymore - therefore we don't do it
* anymore - therefore we don't do it
*/
}
@ -983,13 +993,13 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
log_debug ("word search mode does not yet work\n");
/* FIXME: here is a long standing bug in our function and in addition we
just use the first search description */
for (n=0; n < ndesc && !name; n++)
for (n=0; n < ndesc && !name; n++)
{
if (desc[n].mode == KEYDB_SEARCH_MODE_WORDS)
if (desc[n].mode == KEYDB_SEARCH_MODE_WORDS)
name = desc[n].u.name;
}
assert (name);
if ( !hd->word_match.name || strcmp (hd->word_match.name, name) )
if ( !hd->word_match.name || strcmp (hd->word_match.name, name) )
{
/* name changed */
xfree (hd->word_match.name);
@ -1007,23 +1017,23 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
main_offset = 0;
pk_no = uid_no = 0;
initial_skip = 1; /* skip until we see the start of a keyblock */
while (!(rc=search_packet (hd->current.iobuf, &pkt, &offset, need_uid)))
while (!(rc=search_packet (hd->current.iobuf, &pkt, &offset, need_uid)))
{
byte afp[MAX_FINGERPRINT_LEN];
size_t an;
if (pkt.pkttype == PKT_PUBLIC_KEY || pkt.pkttype == PKT_SECRET_KEY)
if (pkt.pkttype == PKT_PUBLIC_KEY || pkt.pkttype == PKT_SECRET_KEY)
{
main_offset = offset;
pk_no = uid_no = 0;
initial_skip = 0;
}
if (initial_skip)
if (initial_skip)
{
free_packet (&pkt);
continue;
}
pk = NULL;
sk = NULL;
uid = NULL;
@ -1044,13 +1054,13 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
if (use_offtbl && !kr_offtbl_ready)
update_offset_hash_table (kr_offtbl, aki, main_offset);
}
else if (pkt.pkttype == PKT_USER_ID)
else if (pkt.pkttype == PKT_USER_ID)
{
uid = pkt.pkt.user_id;
++uid_no;
}
else if ( pkt.pkttype == PKT_SECRET_KEY
|| pkt.pkttype == PKT_SECRET_SUBKEY)
|| pkt.pkttype == PKT_SECRET_SUBKEY)
{
sk = pkt.pkt.secret_key;
++pk_no;
@ -1062,28 +1072,28 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
}
if (need_keyid)
keyid_from_sk (sk, aki);
}
for (n=0; n < ndesc; n++)
for (n=0; n < ndesc; n++)
{
switch (desc[n].mode) {
case KEYDB_SEARCH_MODE_NONE:
case KEYDB_SEARCH_MODE_NONE:
BUG ();
break;
case KEYDB_SEARCH_MODE_EXACT:
case KEYDB_SEARCH_MODE_EXACT:
case KEYDB_SEARCH_MODE_SUBSTR:
case KEYDB_SEARCH_MODE_MAIL:
case KEYDB_SEARCH_MODE_MAILSUB:
case KEYDB_SEARCH_MODE_MAILEND:
case KEYDB_SEARCH_MODE_WORDS:
case KEYDB_SEARCH_MODE_WORDS:
if ( uid && !compare_name (desc[n].mode,
desc[n].u.name,
uid->name, uid->len))
uid->name, uid->len))
goto found;
break;
case KEYDB_SEARCH_MODE_SHORT_KID:
case KEYDB_SEARCH_MODE_SHORT_KID:
if ((pk||sk) && desc[n].u.kid[1] == aki[1])
goto found;
break;
@ -1097,19 +1107,19 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
goto found;
break;
case KEYDB_SEARCH_MODE_FPR20:
case KEYDB_SEARCH_MODE_FPR:
case KEYDB_SEARCH_MODE_FPR:
if ((pk||sk) && !memcmp (desc[n].u.fpr, afp, 20))
goto found;
break;
case KEYDB_SEARCH_MODE_FIRST:
case KEYDB_SEARCH_MODE_FIRST:
if (pk||sk)
goto found;
break;
case KEYDB_SEARCH_MODE_NEXT:
case KEYDB_SEARCH_MODE_NEXT:
if (pk||sk)
goto found;
break;
default:
default:
rc = G10ERR_INV_ARG;
goto found;
}
@ -1121,7 +1131,7 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
meaningful if this function returns with no errors. */
if(descindex)
*descindex=n;
for (n=any_skip?0:ndesc; n < ndesc; n++)
for (n=any_skip?0:ndesc; n < ndesc; n++)
{
if (desc[n].skipfnc
&& desc[n].skipfnc (desc[n].skipfncvalue, aki, uid))
@ -1147,12 +1157,12 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
if (use_offtbl && !kr_offtbl_ready)
{
KR_NAME kr;
/* First set the did_full_scan flag for this keyring (ignore
secret keyrings) */
for (kr=kr_names; kr; kr = kr->next)
{
if (!kr->secret && hd->resource == kr)
if (!kr->secret && hd->resource == kr)
{
kr->did_full_scan = 1;
break;
@ -1162,14 +1172,14 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
offtbl ready */
for (kr=kr_names; kr; kr = kr->next)
{
if (!kr->secret && !kr->did_full_scan)
if (!kr->secret && !kr->did_full_scan)
break;
}
if (!kr)
kr_offtbl_ready = 1;
}
}
else
else
hd->current.error = rc;
free_packet(&pkt);
@ -1181,7 +1191,7 @@ keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc,
static int
create_tmp_file (const char *template,
char **r_bakfname, char **r_tmpfname, IOBUF *r_fp)
{
{
char *bakfname, *tmpfname;
mode_t oldmask;
@ -1205,7 +1215,7 @@ create_tmp_file (const char *template,
strcpy (tmpfname,template);
strcpy (tmpfname+strlen(template)-4, EXTSEP_S "tmp");
}
else
else
{ /* file does not end with gpg; hmmm */
bakfname = xmalloc (strlen( template ) + 5);
strcpy (stpcpy(bakfname, template), EXTSEP_S "bak");
@ -1239,7 +1249,7 @@ create_tmp_file (const char *template,
xfree (bakfname);
return rc;
}
*r_bakfname = bakfname;
*r_tmpfname = tmpfname;
return 0;
@ -1272,7 +1282,7 @@ rename_tmp_file (const char *bakfname, const char *tmpfname,
/* first make a backup file except for secret keyrings */
if (!secret)
{
{
#if defined(HAVE_DOSISH_SYSTEM) || defined(__riscos__)
remove (bakfname);
#endif
@ -1284,7 +1294,7 @@ rename_tmp_file (const char *bakfname, const char *tmpfname,
return rc;
}
}
/* then rename the file */
#if defined(HAVE_DOSISH_SYSTEM) || defined(__riscos__)
remove( fname );
@ -1309,7 +1319,7 @@ rename_tmp_file (const char *bakfname, const char *tmpfname,
statbuf.st_mode=S_IRUSR | S_IWUSR;
if (((secret && !opt.preserve_permissions)
|| !stat (bakfname,&statbuf))
|| !stat (bakfname,&statbuf))
&& !chmod (fname,statbuf.st_mode))
;
else
@ -1337,10 +1347,10 @@ write_keyblock (IOBUF fp, KBNODE keyblock)
{
KBNODE kbctx = NULL, node;
int rc;
while ( (node = walk_kbnode (keyblock, &kbctx, 0)) )
while ( (node = walk_kbnode (keyblock, &kbctx, 0)) )
{
if (node->pkt->pkttype == PKT_RING_TRUST)
if (node->pkt->pkttype == PKT_RING_TRUST)
continue; /* we write it later on our own */
if ( (rc = build_packet (fp, node->pkt) ))
@ -1349,12 +1359,12 @@ write_keyblock (IOBUF fp, KBNODE keyblock)
node->pkt->pkttype, g10_errstr(rc) );
return rc;
}
if (node->pkt->pkttype == PKT_SIGNATURE)
if (node->pkt->pkttype == PKT_SIGNATURE)
{ /* always write a signature cache packet */
PKT_signature *sig = node->pkt->pkt.signature;
unsigned int cacheval = 0;
if (sig->flags.checked)
if (sig->flags.checked && sig->digest_algo != DIGEST_ALGO_MD5)
{
cacheval |= 1;
if (sig->flags.valid)
@ -1363,7 +1373,7 @@ write_keyblock (IOBUF fp, KBNODE keyblock)
iobuf_put (fp, 0xb0); /* old style packet 12, 1 byte len*/
iobuf_put (fp, 2); /* 2 bytes */
iobuf_put (fp, 0); /* unused */
if (iobuf_put (fp, cacheval))
if (iobuf_put (fp, cacheval))
{
rc = gpg_error_from_syserror ();
log_error ("writing sigcache packet failed\n");
@ -1374,7 +1384,7 @@ write_keyblock (IOBUF fp, KBNODE keyblock)
return 0;
}
/*
/*
* Walk over all public keyrings, check the signatures and replace the
* keyring with a new one where the signature cache is then updated.
* This is only done for the public keyrings.
@ -1419,7 +1429,7 @@ keyring_rebuild_cache (void *token,int noisy)
* the original file is closed */
tmpfp = NULL;
}
rc = lastresname? rename_tmp_file (bakfilename, tmpfilename,
rc = lastresname? rename_tmp_file (bakfilename, tmpfilename,
lastresname, 0) : 0;
xfree (tmpfilename); tmpfilename = NULL;
xfree (bakfilename); bakfilename = NULL;
@ -1432,10 +1442,10 @@ keyring_rebuild_cache (void *token,int noisy)
if (rc)
goto leave;
}
release_kbnode (keyblock);
rc = keyring_get_keyblock (hd, &keyblock);
if (rc)
if (rc)
{
log_error ("keyring_get_keyblock failed: %s\n", g10_errstr(rc));
goto leave;
@ -1479,7 +1489,7 @@ keyring_rebuild_cache (void *token,int noisy)
sigcount++;
}
}
/* write the keyblock to the temporary file */
rc = write_keyblock (tmpfp, keyblock);
if (rc)
@ -1489,10 +1499,10 @@ keyring_rebuild_cache (void *token,int noisy)
log_info(_("%lu keys cached so far (%lu signatures)\n"),
count, sigcount );
} /* end main loop */
} /* end main loop */
if (rc == -1)
rc = 0;
if (rc)
if (rc)
{
log_error ("keyring_search failed: %s\n", g10_errstr(rc));
goto leave;
@ -1520,8 +1530,8 @@ keyring_rebuild_cache (void *token,int noisy)
leave:
if (tmpfp)
iobuf_cancel (tmpfp);
xfree (tmpfilename);
xfree (bakfilename);
xfree (tmpfilename);
xfree (bakfilename);
release_kbnode (keyblock);
keyring_lock (hd, 0);
keyring_release (hd);
@ -1544,13 +1554,13 @@ do_copy (int mode, const char *fname, KBNODE root, int secret,
char *bakfname = NULL;
char *tmpfname = NULL;
/* Open the source file. Because we do a rename, we have to check the
/* Open the source file. Because we do a rename, we have to check the
permissions of the file */
if (access (fname, W_OK))
return gpg_error_from_syserror ();
fp = iobuf_open (fname);
if (mode == 1 && !fp && errno == ENOENT) {
if (mode == 1 && !fp && errno == ENOENT) {
/* insert mode but file does not exist: create a new file */
KBNODE kbctx, node;
mode_t oldmask;

7
g10/main.h
View File

@ -63,9 +63,6 @@ extern int g10_errors_seen;
#else
void g10_exit(int rc);
#endif
void print_pubkey_algo_note( int algo );
void print_cipher_algo_note( int algo );
void print_digest_algo_note( int algo );
/*-- armor.c --*/
char *make_radix64_string( const byte *data, size_t len );
@ -82,6 +79,10 @@ u16 checksum( byte *p, unsigned n );
u16 checksum_mpi( gcry_mpi_t a );
u32 buffer_to_u32( const byte *buffer );
const byte *get_session_marker( size_t *rlen );
void print_pubkey_algo_note( int algo );
void print_cipher_algo_note( int algo );
void print_digest_algo_note( int algo );
void print_md5_rejected_note (void);
int map_cipher_openpgp_to_gcry (int algo);
#define openpgp_cipher_open(_a,_b,_c,_d) gcry_cipher_open((_a),map_cipher_openpgp_to_gcry((_b)),(_c),(_d))
#define openpgp_cipher_get_algo_keylen(_a) gcry_cipher_get_algo_keylen(map_cipher_openpgp_to_gcry((_a)))

16
g10/misc.c
View File

@ -340,6 +340,22 @@ print_digest_algo_note( int algo )
}
void
print_md5_rejected_note (void)
{
static int shown;
if (!shown)
{
fflush (stdout);
log_info
(_("Note: signatures using the %s algorithm are rejected\n"),
"MD5");
shown = 1;
}
}
/* Map OpenPGP algo numbers to those used by Libgcrypt. We need to do
this for algorithms we implemented in Libgcrypt after they become
part of OpenPGP. */

17
g10/sig-check.c
View File

@ -272,16 +272,7 @@ do_check( PKT_public_key *pk, PKT_signature *sig, gcry_md_hd_t digest,
if (sig->digest_algo == GCRY_MD_MD5
&& !opt.flags.allow_weak_digest_algos)
{
static int shown;
if (!shown)
{
log_info
(_("Note: signatures using the %s algorithm are rejected\n"),
"MD5");
shown = 1;
}
print_md5_rejected_note ();
return GPG_ERR_DIGEST_ALGO;
}
@ -549,9 +540,11 @@ check_key_signature2( KBNODE root, KBNODE node, PKT_public_key *check_pk,
/* Check whether we have cached the result of a previous signature
check. Note that we may no longer have the pubkey or hash
needed to verify a sig, but can still use the cached value. A
cache refresh detects and clears these cases. */
cache refresh detects and clears these cases.
For safety reasons we ignore cache entries from MD5 signatures. */
if ( !opt.no_sig_cache ) {
if (sig->flags.checked) { /*cached status available*/
if (sig->flags.checked && sig->digest_algo != DIGEST_ALGO_MD5) {
/*cached status available*/
if( is_selfsig ) {
u32 keyid[2];