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fixed severe exploit

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This commit is contained in:
Werner Koch 1998-07-09 13:37:17 +00:00
parent 5aed77d1db
commit e143f23c23
29 changed files with 1272 additions and 829 deletions
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150
g10/tdbio.h Normal file
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/* tdbio.h - Trust database I/O functions
* Copyright (C) 1998 Free Software Foundation, Inc.
*
* This file is part of GNUPG.
*
* GNUPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNUPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifndef G10_TDBIO_H
#define G10_TDBIO_H
#define TRUST_RECORD_LEN 40
#define SIGS_PER_RECORD ((TRUST_RECORD_LEN-10)/5)
#define ITEMS_PER_HTBL_RECORD ((TRUST_RECORD_LEN-2)/4)
#define ITEMS_PER_HLST_RECORD ((TRUST_RECORD_LEN-6)/5)
#define MAX_LIST_SIGS_DEPTH 20
#define RECTYPE_VER 1
#define RECTYPE_DIR 2
#define RECTYPE_KEY 3
#define RECTYPE_CTL 4
#define RECTYPE_SIG 5
#define RECTYPE_HTBL 6
#define RECTYPE_HLST 7
#define RECTYPE_UID 8
struct trust_record {
int rectype;
union {
struct { /* version record: */
byte version; /* should be 1 */
ulong locked; /* pid of process which holds a lock */
ulong created; /* timestamp of trustdb creation */
ulong modified; /* timestamp of last modification */
ulong validated; /* timestamp of last validation */
byte marginals_needed;
byte completes_needed;
byte max_cert_depth;
} ver;
struct { /* directory record */
ulong local_id;
u32 keyid[2];
ulong keyrec; /* recno of primary public key record */
ulong ctlrec; /* recno of control record */
ulong sigrec; /* recno of first signature record (osolete) */
ulong uidrec; /* recno of first user-id record */
ulong link; /* to next dir record */
byte no_sigs; /* does not have sigature and checked */
} dir;
struct { /* primary public key record */
ulong owner;
u32 keyid[2];
byte pubkey_algo;
byte fingerprint_len;
byte fingerprint[20];
byte ownertrust;
} key;
struct { /* user id reord */
ulong owner; /* point back to the directory record */
ulong chain; /* points to next user id record */
byte subtype; /* must be 0 */
byte namehash[20]; /* ripemd hash of the username */
byte ownertrust;
u32 prefrec; /* recno of reference record */
} uid;
struct { /* control record */
ulong owner;
byte blockhash[20];
byte trustlevel; /* calculated trustlevel */
} ctl;
struct { /* signature record */
ulong owner; /* local_id of record owner (pubkey record) */
ulong chain; /* offset of next record or NULL for last one */
struct {
ulong local_id; /* of pubkey record of signator (0=unused) */
byte flag; /* reserved */
} sig[SIGS_PER_RECORD];
} sig;
struct {
ulong item[ITEMS_PER_HTBL_RECORD];
} htbl;
struct {
ulong chain;
struct {
byte hash;
ulong rnum;
} item[ITEMS_PER_HLST_RECORD];
} hlst;
} r;
};
typedef struct trust_record TRUSTREC;
typedef struct {
ulong local_id; /* localid of the pubkey */
ulong sigrec;
ulong sig_id; /* returned signature id */
unsigned sig_flag; /* returned signature record flag */
struct { /* internal data */
int init_done;
int eof;
TRUSTREC rec;
int index;
} ctl;
} SIGREC_CONTEXT;
/*-- tdbio.c --*/
int tdbio_set_dbname( const char *new_dbname, int create );
const char *tdbio_get_dbname(void);
void tdbio_dump_record( ulong rnum, TRUSTREC *rec, FILE *fp );
int tdbio_read_record( ulong recnum, TRUSTREC *rec, int expected );
int tdbio_write_record( ulong recnum, TRUSTREC *rec );
ulong tdbio_new_recnum(void);
int tdbio_search_record( PKT_public_key *pk, TRUSTREC *rec );
#define buftoulong( p ) ((*(byte*)(p) << 24) | (*((byte*)(p)+1)<< 16) | \
(*((byte*)(p)+2) << 8) | (*((byte*)(p)+3)))
#define buftoushort( p ) ((*((byte*)(p)) << 8) | (*((byte*)(p)+1)))
#define ulongtobuf( p, a ) do { \
((byte*)p)[0] = a >> 24; \
((byte*)p)[1] = a >> 16; \
((byte*)p)[2] = a >> 8; \
((byte*)p)[3] = a ; \
} while(0)
#define ushorttobuf( p, a ) do { \
((byte*)p)[0] = a >> 8; \
((byte*)p)[1] = a ; \
} while(0)
#define buftou32( p) buftoulong( (p) )
#define u32tobuf( p, a) ulongtobuf( (p), (a) )
#endif /*G10_TDBIO_H*/