mirror of
git://git.gnupg.org/gnupg.git
synced 2025-07-03 22:56:33 +02:00
Use inline functions to convert buffer data to scalars.
* include/host2net.h (buf16_to_ulong, buf16_to_uint): New.
(buf16_to_ushort, buf16_to_u16): New.
(buf32_to_size_t, buf32_to_ulong, buf32_to_uint, buf32_to_u32): New.
--
This fixes sign extension on shift problems. Hanno Böck found a case
with an invalid read due to this problem. To fix that almost all uses
of "<< 24" and "<< 8" are changed by this patch to use an inline
function from host2net.h.
(back ported from commit 2183683bd6)
Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch
parent
b62395cf59
commit
3627123dc8
20 changed files with 310 additions and 275 deletions
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@ -33,6 +33,7 @@
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#include "cipher.h"
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#include "i18n.h"
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#include "options.h"
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#include "../include/host2net.h"
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static int do_user_id( IOBUF out, int ctb, PKT_user_id *uid );
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static int do_public_key( IOBUF out, int ctb, PKT_public_key *pk );
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@ -632,8 +633,7 @@ delete_sig_subpkt (subpktarea_t *area, sigsubpkttype_t reqtype )
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if( n == 255 ) {
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if( buflen < 4 )
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break;
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n = (buffer[0] << 24) | (buffer[1] << 16)
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| (buffer[2] << 8) | buffer[3];
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n = buf32_to_size_t (buffer);
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buffer += 4;
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buflen -= 4;
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}
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@ -756,7 +756,7 @@ build_sig_subpkt (PKT_signature *sig, sigsubpkttype_t type,
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/* This should never happen since we don't currently allow
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creating such a subpacket, but just in case... */
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case SIGSUBPKT_SIG_EXPIRE:
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if(buffer_to_u32(buffer)+sig->timestamp<=make_timestamp())
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if (buf32_to_u32 (buffer) + sig->timestamp <= make_timestamp())
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sig->flags.expired=1;
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else
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sig->flags.expired=0;
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17
g10/getkey.c
17
g10/getkey.c
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@ -35,6 +35,7 @@
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#include "trustdb.h"
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#include "i18n.h"
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#include "keyserver-internal.h"
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#include "../include/host2net.h"
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#define MAX_PK_CACHE_ENTRIES PK_UID_CACHE_SIZE
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#define MAX_UID_CACHE_ENTRIES PK_UID_CACHE_SIZE
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@ -1486,14 +1487,14 @@ merge_keys_and_selfsig( KBNODE keyblock )
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p = parse_sig_subpkt( sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL );
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if( pk ) {
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ed = p? pk->timestamp + buffer_to_u32(p):0;
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ed = p? pk->timestamp + buf32_to_u32(p):0;
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if( sig->timestamp > sigdate ) {
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pk->expiredate = ed;
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sigdate = sig->timestamp;
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}
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}
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else {
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ed = p? sk->timestamp + buffer_to_u32(p):0;
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ed = p? sk->timestamp + buf32_to_u32(p):0;
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if( sig->timestamp > sigdate ) {
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sk->expiredate = ed;
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sigdate = sig->timestamp;
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@ -1618,8 +1619,8 @@ fixup_uidnode ( KBNODE uidnode, KBNODE signode, u32 keycreated )
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/* ditto for the key expiration */
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p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
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if( p && buffer_to_u32(p) )
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uid->help_key_expire = keycreated + buffer_to_u32(p);
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if( p && buf32_to_u32 (p) )
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uid->help_key_expire = keycreated + buf32_to_u32(p);
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else
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uid->help_key_expire = 0;
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@ -1833,9 +1834,9 @@ merge_selfsigs_main(KBNODE keyblock, int *r_revoked, struct revoke_info *rinfo)
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key_usage=parse_key_usage(sig);
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p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
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if( p && buffer_to_u32(p) )
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if( p && buf32_to_u32 (p) )
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{
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key_expire = keytimestamp + buffer_to_u32(p);
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key_expire = keytimestamp + buf32_to_u32 (p);
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key_expire_seen = 1;
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}
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@ -2257,8 +2258,8 @@ merge_selfsigs_subkey( KBNODE keyblock, KBNODE subnode )
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subpk->pubkey_usage = key_usage;
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p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE, NULL);
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if ( p && buffer_to_u32(p) )
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key_expire = keytimestamp + buffer_to_u32(p);
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if ( p && buf32_to_u32 (p) )
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key_expire = keytimestamp + buf32_to_u32 (p);
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else
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key_expire = 0;
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subpk->has_expired = key_expire >= curtime? 0 : key_expire;
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14
g10/keygen.c
14
g10/keygen.c
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@ -42,6 +42,7 @@
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#include "i18n.h"
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#include "keyserver-internal.h"
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#include "call-agent.h"
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#include "host2net.h"
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/* The default algorithms. If you change them remember to change them
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also in gpg.c:gpgconf_list. You should also check that the value
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@ -849,10 +850,7 @@ make_backsig (PKT_signature *sig,PKT_public_key *pk,
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}
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else if(buf[1]==255)
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{
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pktlen =buf[2] << 24;
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pktlen|=buf[3] << 16;
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pktlen|=buf[4] << 8;
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pktlen|=buf[5];
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pktlen = buf32_to_size_t (buf+2);
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buf+=6;
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}
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else
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@ -869,14 +867,14 @@ make_backsig (PKT_signature *sig,PKT_public_key *pk,
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break;
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case 2:
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pktlen =buf[mark++] << 24;
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pktlen|=buf[mark++] << 16;
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pktlen = (size_t)buf[mark++] << 24;
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pktlen |= buf[mark++] << 16;
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case 1:
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pktlen|=buf[mark++] << 8;
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pktlen |= buf[mark++] << 8;
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case 0:
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pktlen|=buf[mark++];
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pktlen |= buf[mark++];
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}
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buf+=mark;
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32
g10/keyid.c
32
g10/keyid.c
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@ -34,6 +34,7 @@
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#include "keydb.h"
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#include "i18n.h"
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#include "rmd160.h"
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#include "host2net.h"
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int
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pubkey_letter( int algo )
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@ -175,9 +176,9 @@ v3_keyid (gcry_mpi_t a, u32 *ki)
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else
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{
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p = buffer + nbytes - 8;
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ki[0] = (p[0] << 24) | (p[1] <<16) | (p[2] << 8) | p[3];
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ki[0] = buf32_to_u32 (p);
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p += 4;
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ki[1] = (p[0] << 24) | (p[1] <<16) | (p[2] << 8) | p[3];
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ki[1] = buf32_to_u32 (p);
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}
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xfree (buffer);
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return ki[1];
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@ -271,15 +272,8 @@ keystr_from_desc(KEYDB_SEARCH_DESC *desc)
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{
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u32 keyid[2];
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keyid[0] = ((unsigned char)desc->u.fpr[12] << 24
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| (unsigned char)desc->u.fpr[13] << 16
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| (unsigned char)desc->u.fpr[14] << 8
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| (unsigned char)desc->u.fpr[15]);
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keyid[1] = ((unsigned char)desc->u.fpr[16] << 24
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| (unsigned char)desc->u.fpr[17] << 16
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| (unsigned char)desc->u.fpr[18] << 8
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| (unsigned char)desc->u.fpr[19]);
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keyid[0] = buf32_to_u32 (desc->u.fpr+12);
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keyid[1] = buf32_to_u32 (desc->u.fpr+16);
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return keystr(keyid);
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}
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@ -331,8 +325,8 @@ keyid_from_sk( PKT_secret_key *sk, u32 *keyid )
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if(md)
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{
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dp = gcry_md_read (md, 0);
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keyid[0] = dp[12] << 24 | dp[13] << 16 | dp[14] << 8 | dp[15] ;
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keyid[1] = dp[16] << 24 | dp[17] << 16 | dp[18] << 8 | dp[19] ;
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keyid[0] = buf32_to_u32 (dp+12);
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keyid[1] = buf32_to_u32 (dp+16);
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lowbits = keyid[1];
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gcry_md_close (md);
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sk->keyid[0] = keyid[0];
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@ -386,8 +380,8 @@ keyid_from_pk( PKT_public_key *pk, u32 *keyid )
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if(md)
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{
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dp = gcry_md_read ( md, 0 );
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keyid[0] = dp[12] << 24 | dp[13] << 16 | dp[14] << 8 | dp[15] ;
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keyid[1] = dp[16] << 24 | dp[17] << 16 | dp[18] << 8 | dp[19] ;
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keyid[0] = buf32_to_u32 (dp+12);
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keyid[1] = buf32_to_u32 (dp+16);
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lowbits = keyid[1];
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gcry_md_close (md);
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pk->keyid[0] = keyid[0];
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@ -430,8 +424,8 @@ keyid_from_fingerprint( const byte *fprint, size_t fprint_len, u32 *keyid )
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}
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else {
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const byte *dp = fprint;
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keyid[0] = dp[12] << 24 | dp[13] << 16 | dp[14] << 8 | dp[15] ;
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keyid[1] = dp[16] << 24 | dp[17] << 16 | dp[18] << 8 | dp[19] ;
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keyid[0] = buf32_to_u32 (dp+12);
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keyid[1] = buf32_to_u32 (dp+16);
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}
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return keyid[1];
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@ -721,8 +715,8 @@ fingerprint_from_pk( PKT_public_key *pk, byte *array, size_t *ret_len )
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if (!array)
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array = xmalloc ( len );
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memcpy (array, dp, len );
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pk->keyid[0] = dp[12] << 24 | dp[13] << 16 | dp[14] << 8 | dp[15] ;
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pk->keyid[1] = dp[16] << 24 | dp[17] << 16 | dp[18] << 8 | dp[19] ;
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pk->keyid[0] = buf32_to_u32 (dp+12);
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pk->keyid[1] = buf32_to_u32 (dp+16);
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gcry_md_close( md);
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}
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@ -77,7 +77,6 @@ int is_secured_filename (const char *fname);
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u16 checksum_u16( unsigned n );
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u16 checksum( byte *p, unsigned n );
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u16 checksum_mpi( gcry_mpi_t a );
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u32 buffer_to_u32( const byte *buffer );
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const byte *get_session_marker( size_t *rlen );
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void print_pubkey_algo_note( int algo );
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void print_cipher_algo_note( int algo );
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11
g10/misc.c
11
g10/misc.c
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@ -276,17 +276,6 @@ checksum_mpi (gcry_mpi_t a)
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return csum;
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}
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u32
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buffer_to_u32( const byte *buffer )
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{
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unsigned long a;
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a = *buffer << 24;
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a |= buffer[1] << 16;
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a |= buffer[2] << 8;
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a |= buffer[3];
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return a;
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}
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void
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print_pubkey_algo_note( int algo )
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{
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@ -34,6 +34,7 @@
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#include "options.h"
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#include "main.h"
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#include "i18n.h"
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#include "host2net.h"
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/* Maximum length of packets to avoid excessive memory allocation. */
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@ -90,7 +91,7 @@ static unsigned short
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read_16(IOBUF inp)
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{
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unsigned short a;
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a = iobuf_get_noeof(inp) << 8;
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a = (unsigned short)iobuf_get_noeof(inp) << 8;
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a |= iobuf_get_noeof(inp);
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return a;
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}
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@ -99,7 +100,7 @@ static unsigned long
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read_32(IOBUF inp)
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{
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unsigned long a;
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a = iobuf_get_noeof(inp) << 24;
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a = (unsigned long)iobuf_get_noeof(inp) << 24;
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a |= iobuf_get_noeof(inp) << 16;
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a |= iobuf_get_noeof(inp) << 8;
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a |= iobuf_get_noeof(inp);
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@ -457,7 +458,8 @@ parse( IOBUF inp, PACKET *pkt, int onlykeypkts, off_t *retpos,
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}
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else if( c == 255 )
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{
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pktlen = (hdr[hdrlen++] = iobuf_get_noeof(inp)) << 24;
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pktlen =
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(unsigned long)(hdr[hdrlen++] = iobuf_get_noeof(inp)) << 24;
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pktlen |= (hdr[hdrlen++] = iobuf_get_noeof(inp)) << 16;
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pktlen |= (hdr[hdrlen++] = iobuf_get_noeof(inp)) << 8;
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if( (c = iobuf_get(inp)) == -1 )
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|
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@ -954,14 +956,15 @@ dump_sig_subpkt( int hashed, int type, int critical,
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switch( type ) {
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case SIGSUBPKT_SIG_CREATED:
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if( length >= 4 )
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fprintf (listfp, "sig created %s", strtimestamp( buffer_to_u32(buffer) ) );
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fprintf (listfp, "sig created %s",
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strtimestamp (buf32_to_u32(buffer)) );
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break;
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case SIGSUBPKT_SIG_EXPIRE:
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if( length >= 4 )
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{
|
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if(buffer_to_u32(buffer))
|
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if(buf32_to_u32(buffer))
|
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fprintf (listfp, "sig expires after %s",
|
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strtimevalue( buffer_to_u32(buffer) ) );
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strtimevalue( buf32_to_u32(buffer) ) );
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else
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fprintf (listfp, "sig does not expire");
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}
|
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|
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@ -993,9 +996,9 @@ dump_sig_subpkt( int hashed, int type, int critical,
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case SIGSUBPKT_KEY_EXPIRE:
|
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if( length >= 4 )
|
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{
|
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if(buffer_to_u32(buffer))
|
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if(buf32_to_u32(buffer))
|
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fprintf (listfp, "key expires after %s",
|
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strtimevalue( buffer_to_u32(buffer) ) );
|
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strtimevalue( buf32_to_u32(buffer) ) );
|
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else
|
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fprintf (listfp, "key does not expire");
|
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}
|
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|
|
@ -1018,8 +1021,8 @@ dump_sig_subpkt( int hashed, int type, int critical,
|
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case SIGSUBPKT_ISSUER:
|
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if( length >= 8 )
|
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fprintf (listfp, "issuer key ID %08lX%08lX",
|
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(ulong)buffer_to_u32(buffer),
|
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(ulong)buffer_to_u32(buffer+4) );
|
||||
buf32_to_ulong (buffer),
|
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buf32_to_ulong (buffer+4));
|
||||
break;
|
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case SIGSUBPKT_NOTATION:
|
||||
{
|
||||
|
|
@ -1267,8 +1270,7 @@ enum_sig_subpkt( const subpktarea_t *pktbuf, sigsubpkttype_t reqtype,
|
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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];
|
||||
n = buf32_to_size_t (buffer);
|
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buffer += 4;
|
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buflen -= 4;
|
||||
}
|
||||
|
|
@ -1491,7 +1493,7 @@ parse_signature( IOBUF inp, int pkttype, unsigned long pktlen,
|
|||
|
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p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_SIG_CREATED, NULL );
|
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if(p)
|
||||
sig->timestamp = buffer_to_u32(p);
|
||||
sig->timestamp = buf32_to_u32 (p);
|
||||
else if(!(sig->pubkey_algo>=100 && sig->pubkey_algo<=110)
|
||||
&& opt.verbose)
|
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log_info ("signature packet without timestamp\n");
|
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|
|
@ -1499,16 +1501,16 @@ parse_signature( IOBUF inp, int pkttype, unsigned long pktlen,
|
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p = parse_sig_subpkt2( sig, SIGSUBPKT_ISSUER, NULL );
|
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if(p)
|
||||
{
|
||||
sig->keyid[0] = buffer_to_u32(p);
|
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sig->keyid[1] = buffer_to_u32(p+4);
|
||||
sig->keyid[0] = buf32_to_u32 (p);
|
||||
sig->keyid[1] = buf32_to_u32 (p+4);
|
||||
}
|
||||
else if(!(sig->pubkey_algo>=100 && sig->pubkey_algo<=110)
|
||||
&& opt.verbose)
|
||||
log_info ("signature packet without keyid\n");
|
||||
|
||||
p=parse_sig_subpkt(sig->hashed,SIGSUBPKT_SIG_EXPIRE,NULL);
|
||||
if(p && buffer_to_u32(p))
|
||||
sig->expiredate=sig->timestamp+buffer_to_u32(p);
|
||||
if(p && buf32_to_u32 (p))
|
||||
sig->expiredate = sig->timestamp + buf32_to_u32 (p);
|
||||
if(sig->expiredate && sig->expiredate<=make_timestamp())
|
||||
sig->flags.expired=1;
|
||||
|
||||
|
|
@ -2109,9 +2111,8 @@ parse_attribute_subpkts(PKT_user_id *uid)
|
|||
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;
|
||||
n = buf32_to_size_t (buffer);
|
||||
buffer += 4;
|
||||
buflen -= 4;
|
||||
}
|
||||
else if( n >= 192 ) { /* 2 byte special encoded length header */
|
||||
|
|
|
|||
20
g10/tdbio.c
20
g10/tdbio.c
|
|
@ -1223,13 +1223,13 @@ tdbio_read_record( ulong recnum, TRUSTREC *rec, int expected )
|
|||
rec->r.ver.trust_model = *p++;
|
||||
rec->r.ver.min_cert_level = *p++;
|
||||
p += 2;
|
||||
rec->r.ver.created = buftoulong(p); p += 4;
|
||||
rec->r.ver.nextcheck = buftoulong(p); p += 4;
|
||||
rec->r.ver.created = buf32_to_ulong (p); p += 4;
|
||||
rec->r.ver.nextcheck = buf32_to_ulong (p); p += 4;
|
||||
p += 4;
|
||||
p += 4;
|
||||
rec->r.ver.firstfree =buftoulong(p); p += 4;
|
||||
rec->r.ver.firstfree =buf32_to_ulong (p); p += 4;
|
||||
p += 4;
|
||||
rec->r.ver.trusthashtbl =buftoulong(p); p += 4;
|
||||
rec->r.ver.trusthashtbl =buf32_to_ulong (p); p += 4;
|
||||
if( recnum ) {
|
||||
log_error( _("%s: version record with recnum %lu\n"), db_name,
|
||||
(ulong)recnum );
|
||||
|
|
@ -1242,17 +1242,17 @@ tdbio_read_record( ulong recnum, TRUSTREC *rec, int expected )
|
|||
}
|
||||
break;
|
||||
case RECTYPE_FREE:
|
||||
rec->r.free.next = buftoulong(p); p += 4;
|
||||
rec->r.free.next = buf32_to_ulong (p); p += 4;
|
||||
break;
|
||||
case RECTYPE_HTBL:
|
||||
for(i=0; i < ITEMS_PER_HTBL_RECORD; i++ ) {
|
||||
rec->r.htbl.item[i] = buftoulong(p); p += 4;
|
||||
rec->r.htbl.item[i] = buf32_to_ulong (p); p += 4;
|
||||
}
|
||||
break;
|
||||
case RECTYPE_HLST:
|
||||
rec->r.hlst.next = buftoulong(p); p += 4;
|
||||
rec->r.hlst.next = buf32_to_ulong (p); p += 4;
|
||||
for(i=0; i < ITEMS_PER_HLST_RECORD; i++ ) {
|
||||
rec->r.hlst.rnum[i] = buftoulong(p); p += 4;
|
||||
rec->r.hlst.rnum[i] = buf32_to_ulong (p); p += 4;
|
||||
}
|
||||
break;
|
||||
case RECTYPE_TRUST:
|
||||
|
|
@ -1261,12 +1261,12 @@ tdbio_read_record( ulong recnum, TRUSTREC *rec, int expected )
|
|||
rec->r.trust.depth = *p++;
|
||||
rec->r.trust.min_ownertrust = *p++;
|
||||
p++;
|
||||
rec->r.trust.validlist = buftoulong(p); p += 4;
|
||||
rec->r.trust.validlist = buf32_to_ulong (p); p += 4;
|
||||
break;
|
||||
case RECTYPE_VALID:
|
||||
memcpy( rec->r.valid.namehash, p, 20); p+=20;
|
||||
rec->r.valid.validity = *p++;
|
||||
rec->r.valid.next = buftoulong(p); p += 4;
|
||||
rec->r.valid.next = buf32_to_ulong (p); p += 4;
|
||||
rec->r.valid.full_count = *p++;
|
||||
rec->r.valid.marginal_count = *p++;
|
||||
break;
|
||||
|
|
|
|||
|
|
@ -1629,7 +1629,7 @@ mark_usable_uid_certs (KBNODE keyblock, KBNODE uidnode,
|
|||
u32 expire;
|
||||
|
||||
p = parse_sig_subpkt (sig->hashed, SIGSUBPKT_SIG_EXPIRE, NULL );
|
||||
expire = p? sig->timestamp + buffer_to_u32(p) : 0;
|
||||
expire = p? sig->timestamp + buf32_to_u32 (p) : 0;
|
||||
|
||||
if (expire==0 || expire > curtime )
|
||||
{
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue