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Code Activity

reworked the way hased data is stored and added a "primary" command

Browse Source 
DCVS: ----------------------------------------------------------------------
This commit is contained in:
Werner Koch 2001-08-09 09:34:25 +00:00
parent 0fa9ffe75c
commit aa9da2b07e
14 changed files with 244 additions and 213 deletions
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3
NEWS
View File

@ -12,6 +12,9 @@
* There is no default comment string with ascii armors anymore
except for revocation certificates and --enarmor mode.
* The command "primary" in the edit menu can be used to change the
primary UID.
Noteworthy changes in version 1.0.6 (2001-05-29)
------------------------------------------------

17
g10/ChangeLog
View File

@ -1,5 +1,22 @@
2001-08-08 Werner Koch <wk@gnupg.org>
* packet.h (subpktarea_t): New.
(PKT_signature): Use that type for hashed_data and unhashed_data and
removed the _data prefix from those fields. Changed all users.
* parse-packet.c (parse_signature): Changed allocation for that.
(parse_sig_subpkt): Changed declaration
(enum_sig_subpkt): Ditto and changed implementation accordingly.
* free-packet.c (cp_subpktarea): Renamed from cp_data_block and
adjusted implementation. Changed caller.
* sig-check.c (mdc_kludge_check): Adjusted the hashing.
(do_check): Ditto.
* sign.c (sign_file, clearsign_file, make_keysig_packet,
update_keysig_packet): Ditto.
* build-packet.c (build_sig_subpkt): Partial rewrite.
(find_subpkt): Adjusted and made static.
(delete_sig_subpkt): Adjusted.
(do_signature): Ditto.
* keygen.c (ask_keysize): Do not print the notes about suggested
key sizes if just a DSA key is generated.

212
g10/build-packet.c
View File

@ -589,24 +589,25 @@ do_compressed( IOBUF out, int ctb, PKT_compressed *cd )
/****************
* Find a subpacket of type REQTYPE in BUFFER and a return a pointer
* Find a subpacket of type REQTYPE in AREA and a return a pointer
* to the first byte of that subpacket data.
* And return the length of the packet in RET_N and the number of
* header bytes in RET_HLEN (length header and type byte).
*/
byte *
find_subpkt( byte *buffer, sigsubpkttype_t reqtype,
static byte *
find_subpkt (subpktarea_t *area, sigsubpkttype_t reqtype,
size_t *ret_hlen, size_t *ret_n )
{
byte *buffer;
int buflen;
sigsubpkttype_t type;
byte *bufstart;
size_t n;
if( !buffer )
if( !area )
return NULL;
buflen = (*buffer << 8) | buffer[1];
buffer += 2;
buflen = area->len;
buffer = area->data;
for(;;) {
if( !buflen )
return NULL; /* end of packets; not found */
@ -649,25 +650,23 @@ find_subpkt( byte *buffer, sigsubpkttype_t reqtype,
}
/****************
* Delete all subpackets of type REQTYPE and return the number of bytes
* which are now unused at the end of the buffer.
* Delete all subpackets of type REQTYPE and return a bool whether a packet
* was deleted.
*/
size_t
delete_sig_subpkt( byte *buffer, sigsubpkttype_t reqtype )
int
delete_sig_subpkt (subpktarea_t *area, sigsubpkttype_t reqtype )
{
int buflen, orig_buflen;
int buflen;
sigsubpkttype_t type;
byte *bufstart, *orig_buffer;
byte *buffer, *bufstart;
size_t n;
size_t unused = 0;
int okay = 0;
if( !buffer )
if( !area )
return 0;
orig_buffer = buffer;
buflen = (*buffer << 8) | buffer[1];
buffer += 2;
orig_buflen = buflen;
buflen = area->len;
buffer = area->data;
for(;;) {
if( !buflen ) {
okay = 1;
@ -692,6 +691,7 @@ delete_sig_subpkt( byte *buffer, sigsubpkttype_t reqtype )
}
if( buflen < n )
break;
type = *buffer & 0x7f;
if( type == reqtype ) {
buffer++;
@ -699,10 +699,11 @@ delete_sig_subpkt( byte *buffer, sigsubpkttype_t reqtype )
n--;
if( n > buflen )
break;
memmove (bufstart, buffer + n, n + (buffer-bufstart)); /* shift */
unused += n + (buffer-bufstart);
buffer = bufstart;
buffer += n; /* point to next subpkt */
buflen -= n;
memmove (bufstart, buffer, buflen); /* shift */
unused += buffer - bufstart;
buffer = bufstart;
}
else {
buffer += n; buflen -=n;
@ -711,64 +712,61 @@ delete_sig_subpkt( byte *buffer, sigsubpkttype_t reqtype )
if (!okay)
log_error ("delete_subpkt: buffer shorter than subpacket\n");
assert (unused <= orig_buflen);
orig_buflen -= unused;
orig_buffer[0] = (orig_buflen >> 8) & 0xff;
orig_buffer[1] = orig_buflen & 0xff;
return unused;
assert (unused <= area->len);
area->len -= unused;
return !!unused;
}
/****************
* Create or update a signature subpacket for SIG of TYPE.
* This functions knows where to put the data (hashed or unhashed).
* The function may move data from the unhashed part to the hashed one.
* Note: All pointers into sig->[un]hashed are not valid after a call
* to this function. The data to put into the subpaket should be
* in buffer with a length of buflen.
* Create or update a signature subpacket for SIG of TYPE. This
* functions knows where to put the data (hashed or unhashed). The
* function may move data from the unhashed part to the hashed one.
* Note: All pointers into sig->[un]hashed (e.g. returned by
* parse_sig_subpkt) are not valid after a call to this function. The
* data to put into the subpaket should be in a buffer with a length
* of buflen.
*/
void
build_sig_subpkt (PKT_signature *sig, sigsubpkttype_t type,
const byte *buffer, size_t buflen )
{
byte *data;
size_t hlen, dlen, nlen;
int found=0;
int critical, hashed, realloced;
size_t n, n0;
size_t unused = 0;
byte *p;
int critical, hashed;
subpktarea_t *oldarea, *newarea;
size_t nlen, n, n0;
critical = (type & SIGSUBPKT_FLAG_CRITICAL);
type &= ~SIGSUBPKT_FLAG_CRITICAL;
if( type == SIGSUBPKT_NOTATION )
; /* we allow multiple packets */
else if( (data = find_subpkt( sig->hashed_data, type, &hlen, &dlen )) )
found = 1;
else if( (data = find_subpkt( sig->unhashed_data, type, &hlen, &dlen )))
found = 2;
if (found==1 && (type == SIGSUBPKT_SIG_CREATED) ) {
unused = delete_sig_subpkt (sig->hashed_data, type);
assert (unused);
found = 0;
else if (find_subpkt (sig->hashed, type, NULL, NULL) ) {
switch (type) {
case SIGSUBPKT_SIG_CREATED:
delete_sig_subpkt (sig->hashed, type);
break;
default:
log_bug("build_sig_packet: update of hashed type %d nyi\n", type);
}
}
else if (find_subpkt (sig->unhashed, type, NULL, NULL)) {
switch (type) {
case SIGSUBPKT_PRIV_VERIFY_CACHE:
case SIGSUBPKT_ISSUER:
delete_sig_subpkt (sig->unhashed, type);
break;
default:
log_bug("build_sig_packet: update of unhashed type %d nyi\n",type);
}
else if (found==2 && ( type == SIGSUBPKT_PRIV_VERIFY_CACHE
|| type == SIGSUBPKT_ISSUER
) ) {
unused = delete_sig_subpkt (sig->unhashed_data, type);
assert (unused);
found = 0;
}
if( found )
log_bug("build_sig_packet: update nyi\n");
if( (buflen+1) >= 8384 )
nlen = 5;
nlen = 5; /* write 5 byte length header */
else if( (buflen+1) >= 192 )
nlen = 2;
nlen = 2; /* write 2 byte length header */
else
nlen = 1;
nlen = 1; /* just a 1 byte length header */
switch( type ) {
case SIGSUBPKT_SIG_CREATED:
@ -785,67 +783,55 @@ build_sig_subpkt( PKT_signature *sig, sigsubpkttype_t type,
default: hashed = 0; break;
}
if( hashed ) {
n0 = sig->hashed_data ? ((*sig->hashed_data << 8)
| sig->hashed_data[1]) : 0;
n = n0 + nlen + 1 + buflen; /* length, type, buffer */
realloced = !!sig->hashed_data;
data = sig->hashed_data ? m_realloc( sig->hashed_data, n+2 )
: m_alloc( n+2 );
}
else {
n0 = sig->unhashed_data ? ((*sig->unhashed_data << 8)
| sig->unhashed_data[1]) : 0;
n = n0 + nlen + 1 + buflen; /* length, type, buffer */
if ( sig->unhashed_data && (nlen + 1 + buflen) <= unused ) {
/* does fit into the freed area */
data = sig->unhashed_data;
realloced = 1;
log_debug ("updating area of type %d\n", type );
}
else {
realloced = !!sig->unhashed_data;
data = sig->unhashed_data ? m_realloc( sig->unhashed_data, n+2 )
: m_alloc( n+2 );
}
}
if( critical )
type |= SIGSUBPKT_FLAG_CRITICAL;
data[0] = (n >> 8) & 0xff;
data[1] = n & 0xff;
oldarea = hashed? sig->hashed : sig->unhashed;
/* Calculate new size of the area and allocate */
n0 = oldarea? oldarea->len : 0;
n = n0 + nlen + 1 + buflen; /* length, type, buffer */
if (oldarea && n <= oldarea->size) { /* fits into the unused space */
newarea = oldarea;
/*log_debug ("updating area for type %d\n", type );*/
}
else if (oldarea) {
newarea = m_realloc (oldarea, sizeof (*newarea) + n - 1);
newarea->size = sizeof (*newarea) + n - 1;
/*log_debug ("reallocating area for type %d\n", type );*/
}
else {
newarea = m_alloc (sizeof (*newarea) + n - 1);
/*log_debug ("allocating area for type %d\n", type );*/
}
newarea->len = n;
p = newarea->data + n0;
if (nlen == 5) {
data[n0+2] = 255;
data[n0+3] = (buflen+1) >> 24;
data[n0+4] = (buflen+1) >> 16;
data[n0+5] = (buflen+1) >> 8;
data[n0+6] = (buflen+1);
data[n0+7] = type;
memcpy(data+n0+8, buffer, buflen );
*p++ = 255;
*p++ = (buflen+1) >> 24;
*p++ = (buflen+1) >> 16;
*p++ = (buflen+1) >> 8;
*p++ = (buflen+1);
*p++ = type;
memcpy (p, buffer, buflen);
}
else if (nlen == 2) {
data[n0+2] = (buflen+1-192) / 256 + 192;
data[n0+3] = (buflen+1-192) % 256;
data[n0+4] = type;
memcpy(data+n0+5, buffer, buflen );
*p++ = (buflen+1-192) / 256 + 192;
*p++ = (buflen+1-192) % 256;
*p++ = type;
memcpy (p, buffer, buflen);
}
else {
data[n0+2] = buflen+1;
data[n0+3] = type;
memcpy(data+n0+4, buffer, buflen );
*p++ = buflen+1;
*p++ = type;
memcpy (p, buffer, buflen);
}
if( hashed ) {
if( !realloced )
m_free(sig->hashed_data);
sig->hashed_data = data;
}
else {
if( !realloced )
m_free(sig->unhashed_data);
sig->unhashed_data = data;
}
if (hashed)
sig->hashed = newarea;
else
sig->unhashed = newarea;
}
/****************
@ -905,16 +891,14 @@ do_signature( IOBUF out, int ctb, PKT_signature *sig )
/* timestamp and keyid must have been packed into the
* subpackets prior to the call of this function, because
* these subpackets are hashed */
nn = sig->hashed_data?((sig->hashed_data[0]<<8)
|sig->hashed_data[1]) :0;
nn = sig->hashed? sig->hashed->len : 0;
write_16(a, nn);
if( nn )
iobuf_write( a, sig->hashed_data+2, nn );
nn = sig->unhashed_data?((sig->unhashed_data[0]<<8)
|sig->unhashed_data[1]) :0;
iobuf_write( a, sig->hashed->data, nn );
nn = sig->unhashed? sig->unhashed->len : 0;
write_16(a, nn);
if( nn )
iobuf_write( a, sig->unhashed_data+2, nn );
iobuf_write( a, sig->unhashed->data, nn );
}
iobuf_put(a, sig->digest_start[0] );
iobuf_put(a, sig->digest_start[1] );

2
g10/export.c
View File

@ -199,7 +199,7 @@ do_export_stream( IOBUF out, STRLIST users, int secret, int onlyrfc, int *any )
continue; /* not exportable */
/* delete our verification cache */
delete_sig_subpkt (node->pkt->pkt.signature->unhashed_data,
delete_sig_subpkt (node->pkt->pkt.signature->unhashed,
SIGSUBPKT_PRIV_VERIFY_CACHE);
}

22
g10/free-packet.c
View File

@ -59,8 +59,8 @@ free_seckey_enc( PKT_signature *sig )
mpi_free(sig->data[0]);
for(i=0; i < n; i++ )
mpi_free( sig->data[i] );
m_free(sig->hashed_data);
m_free(sig->unhashed_data);
m_free(sig->hashed);
m_free(sig->unhashed);
m_free(sig);
}
@ -92,17 +92,17 @@ free_public_key( PKT_public_key *pk )
}
static void *
cp_data_block( byte *s )
static subpktarea_t *
cp_subpktarea (subpktarea_t *s )
{
byte *d;
u16 len;
subpktarea_t *d;
if( !s )
return NULL;
len = (s[0] << 8) | s[1];
d = m_alloc( len+2 );
memcpy(d, s, len+2);
d = m_alloc (sizeof (*d) + s->size - 1 );
d->size = s->size;
d->len = s->len;
memcpy (d->data, s->data, s->len);
return d;
}
@ -177,8 +177,8 @@ copy_signature( PKT_signature *d, PKT_signature *s )
for(i=0; i < n; i++ )
d->data[i] = mpi_copy( s->data[i] );
}
d->hashed_data = cp_data_block(s->hashed_data);
d->unhashed_data = cp_data_block(s->unhashed_data);
d->hashed = cp_subpktarea (s->hashed);
d->unhashed = cp_subpktarea (s->unhashed);
return d;
}

23
g10/getkey.c
View File

@ -1380,7 +1380,7 @@ merge_keys_and_selfsig( KBNODE keyblock )
const byte *p;
u32 ed;
p = parse_sig_subpkt( sig->hashed_data, SIGSUBPKT_KEY_EXPIRE, NULL );
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 ) {
@ -1418,7 +1418,7 @@ fixup_uidnode ( KBNODE uidnode, KBNODE signode, u32 keycreated )
/* store the key flags in the helper variable for later processing */
uid->help_key_usage = 0;
p = parse_sig_subpkt ( sig->hashed_data, SIGSUBPKT_KEY_FLAGS, &n );
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_FLAGS, &n );
if ( p && n ) {
/* first octet of the keyflags */
if ( (*p & 3) )
@ -1429,7 +1429,7 @@ fixup_uidnode ( KBNODE uidnode, KBNODE signode, u32 keycreated )
/* ditto or the key expiration */
uid->help_key_expire = 0;
p = parse_sig_subpkt ( sig->hashed_data, SIGSUBPKT_KEY_EXPIRE, NULL);
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
if ( p ) {
uid->help_key_expire = keycreated + buffer_to_u32(p);
}
@ -1437,7 +1437,7 @@ fixup_uidnode ( KBNODE uidnode, KBNODE signode, u32 keycreated )
/* Set the primary user ID flag - we will later wipe out some
* of them to only have one in out keyblock */
uid->is_primary = 0;
p = parse_sig_subpkt ( sig->hashed_data, SIGSUBPKT_PRIMARY_UID, NULL );
p = parse_sig_subpkt ( sig->hashed, SIGSUBPKT_PRIMARY_UID, NULL );
if ( p && *p )
uid->is_primary = 1;
/* We could also query this from the unhashed area if it is not in
@ -1505,7 +1505,7 @@ merge_selfsigs_main( KBNODE keyblock, int *r_revoked )
else if ( IS_KEY_SIG (sig) && sig->timestamp >= sigdate ) {
const byte *p;
p = parse_sig_subpkt( sig->hashed_data,
p = parse_sig_subpkt( sig->hashed,
SIGSUBPKT_SIG_EXPIRE, NULL );
if ( p && (sig->timestamp + buffer_to_u32(p)) >= curtime )
; /* signature has expired - ignore it */
@ -1526,7 +1526,7 @@ merge_selfsigs_main( KBNODE keyblock, int *r_revoked )
const byte *p;
size_t n;
p = parse_sig_subpkt ( sig->hashed_data, SIGSUBPKT_KEY_FLAGS, &n );
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_FLAGS, &n );
if ( p && n ) {
/* first octet of the keyflags */
if ( (*p & 3) )
@ -1536,8 +1536,7 @@ merge_selfsigs_main( KBNODE keyblock, int *r_revoked )
}
if ( pk->version > 3 ) {
p = parse_sig_subpkt ( sig->hashed_data,
SIGSUBPKT_KEY_EXPIRE, NULL);
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
if ( p ) {
key_expire = keytimestamp + buffer_to_u32(p);
key_expire_seen = 1;
@ -1580,7 +1579,7 @@ merge_selfsigs_main( KBNODE keyblock, int *r_revoked )
*/
const byte *p;
p = parse_sig_subpkt( sig->hashed_data,
p = parse_sig_subpkt (sig->hashed,
SIGSUBPKT_SIG_EXPIRE, NULL );
if ( p && (sig->timestamp + buffer_to_u32(p)) >= curtime )
; /* signature/revocation has expired - ignore it */
@ -1733,7 +1732,7 @@ merge_selfsigs_subkey( KBNODE keyblock, KBNODE subnode )
* time */
}
else if ( IS_SUBKEY_SIG (sig) && sig->timestamp >= sigdate ) {
p = parse_sig_subpkt( sig->hashed_data,
p = parse_sig_subpkt (sig->hashed,
SIGSUBPKT_SIG_EXPIRE, NULL );
if ( p && (sig->timestamp + buffer_to_u32(p)) >= curtime )
; /* signature has expired - ignore it */
@ -1753,7 +1752,7 @@ merge_selfsigs_subkey( KBNODE keyblock, KBNODE subnode )
subpk->is_valid = 1;
sig = signode->pkt->pkt.signature;
p = parse_sig_subpkt ( sig->hashed_data, SIGSUBPKT_KEY_FLAGS, &n );
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_FLAGS, &n );
if ( p && n ) {
/* first octet of the keyflags */
if ( (*p & 3) )
@ -1771,7 +1770,7 @@ merge_selfsigs_subkey( KBNODE keyblock, KBNODE subnode )
}
subpk->pubkey_usage = key_usage;
p = parse_sig_subpkt ( sig->hashed_data, SIGSUBPKT_KEY_EXPIRE, NULL);
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
if ( p )
key_expire = keytimestamp + buffer_to_u32(p);

2
g10/import.c
View File

@ -359,7 +359,7 @@ remove_bad_stuff (KBNODE keyblock)
for (node=keyblock; node; node = node->next ) {
if( node->pkt->pkttype == PKT_SIGNATURE ) {
/* delete the subpackets we use for the verification cache */
delete_sig_subpkt (node->pkt->pkt.signature->unhashed_data,
delete_sig_subpkt (node->pkt->pkt.signature->unhashed,
SIGSUBPKT_PRIV_VERIFY_CACHE);
}
}

8
g10/keyedit.c
View File

@ -1653,8 +1653,8 @@ change_primary_uid_cb ( PKT_signature *sig, void *opaque )
/* first clear all primary uid flags so that we are sure none are
* lingering around */
delete_sig_subpkt (sig->hashed_data, SIGSUBPKT_PRIMARY_UID);
delete_sig_subpkt (sig->unhashed_data, SIGSUBPKT_PRIMARY_UID);
delete_sig_subpkt (sig->hashed, SIGSUBPKT_PRIMARY_UID);
delete_sig_subpkt (sig->unhashed, SIGSUBPKT_PRIMARY_UID);
/* if opaque is set,we want to set the primary id */
if (opaque) {
@ -1725,10 +1725,10 @@ menu_set_primary_uid ( KBNODE pub_keyblock, KBNODE sec_keyblock )
int action;
/* see whether this signature has the primary UID flag */
p = parse_sig_subpkt (sig->hashed_data,
p = parse_sig_subpkt (sig->hashed,
SIGSUBPKT_PRIMARY_UID, NULL );
if ( !p )
p = parse_sig_subpkt (sig->unhashed_data,
p = parse_sig_subpkt (sig->unhashed,
SIGSUBPKT_PRIMARY_UID, NULL );
if ( p && *p ) /* yes */
action = selected? 0 : -1;

5
g10/mainproc.c
View File

@ -715,8 +715,7 @@ print_notation_data( PKT_signature *sig )
const byte *p;
int seq = 0;
while( (p = enum_sig_subpkt( sig->hashed_data, SIGSUBPKT_NOTATION,
&n, &seq )) ) {
while( (p = enum_sig_subpkt (sig->hashed, SIGSUBPKT_NOTATION, &n, &seq))) {
if( n < 8 ) {
log_info(_("WARNING: invalid notation data found\n"));
return;
@ -738,7 +737,7 @@ print_notation_data( PKT_signature *sig )
write_status_buffer ( STATUS_NOTATION_NAME, p , n1, 0 );
write_status_buffer ( STATUS_NOTATION_DATA, p+n1, n2, 20 );
}
if( (p = parse_sig_subpkt( sig->hashed_data, SIGSUBPKT_POLICY, &n ) )) {
if( (p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_POLICY, &n ) )) {
log_info(_("Policy: ") );
print_string( log_stream(), p, n, 0 );
putc( '\n', log_stream() );

24
g10/packet.h
View File

@ -96,6 +96,12 @@ typedef struct {
} PKT_onepass_sig;
typedef struct {
size_t size; /* allocated */
size_t len; /* used */
byte data[1];
} subpktarea_t;
typedef struct {
ulong local_id; /* internal use, valid if > 0 */
struct {
@ -110,8 +116,8 @@ typedef struct {
byte pubkey_algo; /* algorithm used for public key scheme */
/* (PUBKEY_ALGO_xxx) */
byte digest_algo; /* algorithm used for digest (DIGEST_ALGO_xxxx) */
byte *hashed_data; /* all subpackets with hashed data (v4 only) */
byte *unhashed_data; /* ditto for unhashed data */
subpktarea_t *hashed; /* all subpackets with hashed data (v4 only) */
subpktarea_t *unhashed; /* ditto for unhashed data */
byte digest_start[2]; /* first 2 bytes of the digest */
MPI data[PUBKEY_MAX_NSIG];
} PKT_signature;
@ -325,14 +331,18 @@ int copy_some_packets( IOBUF inp, IOBUF out, off_t stopoff );
int skip_some_packets( IOBUF inp, unsigned n );
#endif
const byte *enum_sig_subpkt( const byte *buffer, sigsubpkttype_t reqtype,
const byte *enum_sig_subpkt ( const subpktarea_t *subpkts,
sigsubpkttype_t reqtype,
size_t *ret_n, int *start );
const byte *parse_sig_subpkt( const byte *buffer, sigsubpkttype_t reqtype,
const byte *parse_sig_subpkt ( const subpktarea_t *buffer,
sigsubpkttype_t reqtype,
size_t *ret_n );
const byte *parse_sig_subpkt2 ( PKT_signature *sig,
sigsubpkttype_t reqtype, size_t *ret_n );
sigsubpkttype_t reqtype,
size_t *ret_n );
PACKET *create_gpg_control ( ctrlpkttype_t type,
const byte *data, size_t datalen );
const byte *data,
size_t datalen );
/*-- build-packet.c --*/
int build_packet( IOBUF inp, PACKET *pkt );
@ -341,7 +351,7 @@ void hash_public_key( MD_HANDLE md, PKT_public_key *pk );
void build_sig_subpkt( PKT_signature *sig, sigsubpkttype_t type,
const byte *buffer, size_t buflen );
void build_sig_subpkt_from_sig( PKT_signature *sig );
size_t delete_sig_subpkt( byte *buffer, sigsubpkttype_t type );
int delete_sig_subpkt(subpktarea_t *buffer, sigsubpkttype_t type );
/*-- free-packet.c --*/
void free_symkey_enc( PKT_symkey_enc *enc );

63
g10/parse-packet.c
View File

@ -954,9 +954,10 @@ can_handle_critical( const byte *buffer, size_t n, int type )
const byte *
enum_sig_subpkt( const byte *buffer, sigsubpkttype_t reqtype,
enum_sig_subpkt( const subpktarea_t *pktbuf, sigsubpkttype_t reqtype,
size_t *ret_n, int *start )
{
const byte *buffer;
int buflen;
int type;
int critical;
@ -965,26 +966,25 @@ enum_sig_subpkt( const byte *buffer, sigsubpkttype_t reqtype,
int seq = 0;
int reqseq = start? *start: 0;
if( !buffer || reqseq == -1 ) {
if( !pktbuf || reqseq == -1 ) {
/* return some value different from NULL to indicate that
* there is no crtitical bit we do not understand. The caller
* there is no critical bit we do not understand. The caller
* will never use the value. Yes I know, it is an ugly hack */
return reqtype == SIGSUBPKT_TEST_CRITICAL? (const byte*)&buffer : NULL;
return reqtype == SIGSUBPKT_TEST_CRITICAL? (const byte*)&pktbuf : NULL;
}
buflen = (*buffer << 8) | buffer[1];
buffer += 2;
buffer = pktbuf->data;
buflen = pktbuf->len;
while( buflen ) {
n = *buffer++; buflen--;
if( n == 255 ) {
if( n == 255 ) { /* 4 byte length header */
if( buflen < 4 )
goto too_short;
n = (buffer[0] << 24) | (buffer[1] << 16)
| (buffer[2] << 8) | buffer[3];
buffer += 4;
buflen -= 4;
}
else if( n >= 192 ) {
else if( n >= 192 ) { /* 2 byte special encoded length header */
if( buflen < 2 )
goto too_short;
n = (( n - 192 ) << 8) + *buffer + 192;
@ -1059,19 +1059,21 @@ enum_sig_subpkt( const byte *buffer, sigsubpkttype_t reqtype,
const byte *
parse_sig_subpkt( const byte *buffer, sigsubpkttype_t reqtype, size_t *ret_n )
parse_sig_subpkt (const subpktarea_t *buffer, sigsubpkttype_t reqtype,
size_t *ret_n)
{
return enum_sig_subpkt( buffer, reqtype, ret_n, NULL );
}
const byte *
parse_sig_subpkt2( PKT_signature *sig, sigsubpkttype_t reqtype, size_t *ret_n )
parse_sig_subpkt2 (PKT_signature *sig, sigsubpkttype_t reqtype,
size_t *ret_n )
{
const byte *p;
p = parse_sig_subpkt( sig->hashed_data, reqtype, ret_n );
p = parse_sig_subpkt (sig->hashed, reqtype, ret_n );
if( !p )
p = parse_sig_subpkt( sig->unhashed_data, reqtype, ret_n );
p = parse_sig_subpkt (sig->unhashed, reqtype, ret_n );
return p;
}
@ -1119,11 +1121,12 @@ parse_signature( IOBUF inp, int pkttype, unsigned long pktlen,
goto leave;
}
if( n ) {
sig->hashed_data = m_alloc( n + 2 );
sig->hashed_data[0] = n >> 8;
sig->hashed_data[1] = n;
if( iobuf_read(inp, sig->hashed_data+2, n ) != n ) {
log_error("premature eof while reading hashed signature data\n");
sig->hashed = m_alloc (sizeof (*sig->hashed) + n - 1 );
sig->hashed->size = n;
sig->hashed->len = n;
if( iobuf_read (inp, sig->hashed->data, n ) != n ) {
log_error ("premature eof while reading "
"hashed signature data\n");
rc = -1;
goto leave;
}
@ -1136,11 +1139,15 @@ parse_signature( IOBUF inp, int pkttype, unsigned long pktlen,
goto leave;
}
if( n ) {
sig->unhashed_data = m_alloc( n + 2 );
sig->unhashed_data[0] = n >> 8;
sig->unhashed_data[1] = n;
if( iobuf_read(inp, sig->unhashed_data+2, n ) != n ) {
log_error("premature eof while reading unhashed signature data\n");
/* we add 6 extra bytes so that we have space for the signature
* status cache. Well we are wastin this if there is a cache
* packet already, but in the other case it avoids an realloc */
sig->unhashed = m_alloc (sizeof(*sig->unhashed) + n + 8 - 1 );
sig->unhashed->size = n + 8;
sig->unhashed->len = n;
if( iobuf_read(inp, sig->unhashed->data, n ) != n ) {
log_error("premature eof while reading "
"unhashed signature data\n");
rc = -1;
goto leave;
}
@ -1162,14 +1169,14 @@ parse_signature( IOBUF inp, int pkttype, unsigned long pktlen,
/* set sig->flags.unknown_critical if there is a
* critical bit set for packets which we do not understand */
if( !parse_sig_subpkt( sig->hashed_data, SIGSUBPKT_TEST_CRITICAL, NULL)
|| !parse_sig_subpkt( sig->unhashed_data, SIGSUBPKT_TEST_CRITICAL,
if( !parse_sig_subpkt (sig->hashed, SIGSUBPKT_TEST_CRITICAL, NULL)
|| !parse_sig_subpkt (sig->unhashed, SIGSUBPKT_TEST_CRITICAL,
NULL) )
{
sig->flags.unknown_critical = 1;
}
p = parse_sig_subpkt( sig->hashed_data, SIGSUBPKT_SIG_CREATED, NULL );
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_SIG_CREATED, NULL );
if( !p )
log_error("signature packet without timestamp\n");
else
@ -1193,8 +1200,8 @@ parse_signature( IOBUF inp, int pkttype, unsigned long pktlen,
sig->digest_algo,
sig->digest_start[0], sig->digest_start[1] );
if( is_v4 ) {
parse_sig_subpkt( sig->hashed_data, SIGSUBPKT_LIST_HASHED, NULL );
parse_sig_subpkt( sig->unhashed_data,SIGSUBPKT_LIST_UNHASHED, NULL);
parse_sig_subpkt (sig->hashed, SIGSUBPKT_LIST_HASHED, NULL );
parse_sig_subpkt (sig->unhashed, SIGSUBPKT_LIST_UNHASHED, NULL);
}
}

2
g10/pkclist.c
View File

@ -107,7 +107,7 @@ do_show_revocation_reason( PKT_signature *sig )
int seq = 0;
const char *text;
while( (p = enum_sig_subpkt( sig->hashed_data, SIGSUBPKT_REVOC_REASON,
while( (p = enum_sig_subpkt (sig->hashed, SIGSUBPKT_REVOC_REASON,
&n, &seq )) ) {
if( !n )
continue; /* invalid - just skip it */

18
g10/sig-check.c
View File

@ -153,9 +153,11 @@ mdc_kludge_check( PKT_signature *sig, MD_HANDLE digest )
size_t n;
md_putc( digest, sig->pubkey_algo );
md_putc( digest, sig->digest_algo );
if( sig->hashed_data ) {
n = (sig->hashed_data[0] << 8) | sig->hashed_data[1];
md_write( digest, sig->hashed_data, n+2 );
if( sig->hashed ) {
n = sig->hashed->len;
md_putc (digest, (n >> 8) );
md_putc (digest, n );
md_write (digest, sig->hashed->data, n);
n += 6;
}
else
@ -357,9 +359,11 @@ do_check( PKT_public_key *pk, PKT_signature *sig, MD_HANDLE digest,
size_t n;
md_putc( digest, sig->pubkey_algo );
md_putc( digest, sig->digest_algo );
if( sig->hashed_data ) {
n = (sig->hashed_data[0] << 8) | sig->hashed_data[1];
md_write( digest, sig->hashed_data, n+2 );
if( sig->hashed ) {
n = sig->hashed->len;
md_putc (digest, (n >> 8) );
md_putc (digest, n );
md_write (digest, sig->hashed->data, n);
n += 6;
}
else
@ -510,7 +514,7 @@ check_key_signature2( KBNODE root, KBNODE node, int *is_selfsig,
const byte *p;
size_t len;
p = parse_sig_subpkt( sig->unhashed_data,
p = parse_sig_subpkt( sig->unhashed,
SIGSUBPKT_PRIV_VERIFY_CACHE, &len );
if ( p && len >= 2 && p[0] == 1 ) { /* cache hit */
if( is_selfsig ) {

32
g10/sign.c
View File

@ -536,9 +536,11 @@ sign_file( STRLIST filenames, int detached, STRLIST locusr,
md_putc( md, sig->pubkey_algo );
md_putc( md, sig->digest_algo );
if( sig->hashed_data ) {
n = (sig->hashed_data[0] << 8) | sig->hashed_data[1];
md_write( md, sig->hashed_data, n+2 );
if( sig->hashed ) {
n = sig->hashed->len;
md_putc (md, (n >> 8) );
md_putc (md, n );
md_write (md, sig->hashed->data, n );
n += 6;
}
else {
@ -740,9 +742,11 @@ clearsign_file( const char *fname, STRLIST locusr, const char *outfile )
md_putc( md, sig->pubkey_algo );
md_putc( md, sig->digest_algo );
if( sig->hashed_data ) {
n = (sig->hashed_data[0] << 8) | sig->hashed_data[1];
md_write( md, sig->hashed_data, n+2 );
if( sig->hashed ) {
n = sig->hashed->len;
md_putc (md, (n >> 8) );
md_putc (md, n );
md_write (md, sig->hashed->data, n);
n += 6;
}
else {
@ -882,9 +886,11 @@ make_keysig_packet( PKT_signature **ret_sig, PKT_public_key *pk,
md_putc( md, sig->pubkey_algo );
md_putc( md, sig->digest_algo );
if( sig->hashed_data ) {
n = (sig->hashed_data[0] << 8) | sig->hashed_data[1];
md_write( md, sig->hashed_data, n+2 );
if( sig->hashed ) {
n = sig->hashed->len;
md_putc (md, (n >> 8) );
md_putc (md, n );
md_write (md, sig->hashed->data, n );
n += 6;
}
else {
@ -988,9 +994,11 @@ update_keysig_packet( PKT_signature **ret_sig,
md_putc( md, sig->pubkey_algo );
md_putc( md, sig->digest_algo );
if( sig->hashed_data ) {
n = (sig->hashed_data[0] << 8) | sig->hashed_data[1];
md_write( md, sig->hashed_data, n+2 );
if( sig->hashed ) {
n = sig->hashed->len;
md_putc (md, (n >> 8) );
md_putc (md, n );
md_write (md, sig->hashed->data, n );
n += 6;
}
else {