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gnupg/g10/tdbio.c

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1998-07-09 13:37:17 +00:00
/* tdbio.c
2001-03-08 14:33:24 +00:00
* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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*
* This file is part of GnuPG.
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*
* GnuPG is free software; you can redistribute it and/or modify
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* 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,
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* 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
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "errors.h"
#include "iobuf.h"
#include "memory.h"
#include "util.h"
#include "options.h"
#include "main.h"
#include "i18n.h"
#include "trustdb.h"
#include "tdbio.h"
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/****************
* Yes, this is a very simple implementation. We should really
* use a page aligned buffer and read complete pages.
* To implement a simple trannsaction system, this is sufficient.
*/
typedef struct cache_ctrl_struct *CACHE_CTRL;
struct cache_ctrl_struct {
CACHE_CTRL next;
struct {
unsigned used:1;
unsigned dirty:1;
} flags;
ulong recno;
char data[TRUST_RECORD_LEN];
};
#define MAX_CACHE_ENTRIES_SOFT 200 /* may be increased while in a */
#define MAX_CACHE_ENTRIES_HARD 10000 /* transaction to this one */
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static CACHE_CTRL cache_list;
static int cache_entries;
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static int cache_is_dirty;
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/* a type used to pass infomation to cmp_krec_fpr */
struct cmp_krec_fpr_struct {
int pubkey_algo;
const char *fpr;
int fprlen;
};
/* a type used to pass infomation to cmp_[s]dir */
struct cmp_xdir_struct {
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int pubkey_algo;
u32 keyid[2];
};
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static char *db_name;
static DOTLOCK lockhandle;
static int is_locked;
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static int db_fd = -1;
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static int in_transaction;
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static void open_db(void);
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/*************************************
************* record cache **********
*************************************/
/****************
* Get the data from therecord cache and return a
* pointer into that cache. Caller should copy
* the return data. NULL is returned on a cache miss.
*/
static const char *
get_record_from_cache( ulong recno )
{
CACHE_CTRL r;
for( r = cache_list; r; r = r->next ) {
if( r->flags.used && r->recno == recno )
return r->data;
}
return NULL;
}
static int
write_cache_item( CACHE_CTRL r )
{
int n;
if( lseek( db_fd, r->recno * TRUST_RECORD_LEN, SEEK_SET ) == -1 ) {
log_error(_("trustdb rec %lu: lseek failed: %s\n"),
r->recno, strerror(errno) );
return G10ERR_WRITE_FILE;
}
n = write( db_fd, r->data, TRUST_RECORD_LEN);
if( n != TRUST_RECORD_LEN ) {
log_error(_("trustdb rec %lu: write failed (n=%d): %s\n"),
r->recno, n, strerror(errno) );
return G10ERR_WRITE_FILE;
}
r->flags.dirty = 0;
return 0;
}
/****************
* Put data into the cache. This function may flush the
* some cache entries if there is not enough space available.
*/
int
put_record_into_cache( ulong recno, const char *data )
{
CACHE_CTRL r, unused;
int dirty_count = 0;
int clean_count = 0;
/* see whether we already cached this one */
for( unused = NULL, r = cache_list; r; r = r->next ) {
if( !r->flags.used ) {
if( !unused )
unused = r;
}
else if( r->recno == recno ) {
if( !r->flags.dirty ) {
/* Hmmm: should we use a a copy and compare? */
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if( memcmp(r->data, data, TRUST_RECORD_LEN ) ) {
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r->flags.dirty = 1;
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cache_is_dirty = 1;
}
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}
memcpy( r->data, data, TRUST_RECORD_LEN );
return 0;
}
if( r->flags.used ) {
if( r->flags.dirty )
dirty_count++;
else
clean_count++;
}
}
/* not in the cache: add a new entry */
if( unused ) { /* reuse this entry */
r = unused;
r->flags.used = 1;
r->recno = recno;
memcpy( r->data, data, TRUST_RECORD_LEN );
r->flags.dirty = 1;
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cache_is_dirty = 1;
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cache_entries++;
return 0;
}
/* see whether we reached the limit */
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if( cache_entries < MAX_CACHE_ENTRIES_SOFT ) { /* no */
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r = m_alloc( sizeof *r );
r->flags.used = 1;
r->recno = recno;
memcpy( r->data, data, TRUST_RECORD_LEN );
r->flags.dirty = 1;
r->next = cache_list;
cache_list = r;
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cache_is_dirty = 1;
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cache_entries++;
return 0;
}
/* cache is full: discard some clean entries */
if( clean_count ) {
int n = clean_count / 3; /* discard a third of the clean entries */
if( !n )
n = 1;
for( unused = NULL, r = cache_list; r; r = r->next ) {
if( r->flags.used && !r->flags.dirty ) {
if( !unused )
unused = r;
r->flags.used = 0;
cache_entries--;
if( !--n )
break;
}
}
assert( unused );
r = unused;
r->flags.used = 1;
r->recno = recno;
memcpy( r->data, data, TRUST_RECORD_LEN );
r->flags.dirty = 1;
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cache_is_dirty = 1;
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cache_entries++;
return 0;
}
/* no clean entries: have to flush some dirty entries */
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if( in_transaction ) {
/* but we can't do this while in a transaction
* we increase the cache size instead */
if( cache_entries < MAX_CACHE_ENTRIES_HARD ) { /* no */
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if( opt.debug && !(cache_entries % 100) )
log_debug("increasing tdbio cache size\n");
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r = m_alloc( sizeof *r );
r->flags.used = 1;
r->recno = recno;
memcpy( r->data, data, TRUST_RECORD_LEN );
r->flags.dirty = 1;
r->next = cache_list;
cache_list = r;
cache_is_dirty = 1;
cache_entries++;
return 0;
}
log_info(_("trustdb transaction too large\n"));
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return G10ERR_RESOURCE_LIMIT;
}
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if( dirty_count ) {
int n = dirty_count / 5; /* discard some dirty entries */
if( !n )
n = 1;
if( !is_locked ) {
if( make_dotlock( lockhandle, -1 ) )
log_fatal("can't acquire lock - giving up\n");
else
is_locked = 1;
}
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for( unused = NULL, r = cache_list; r; r = r->next ) {
if( r->flags.used && r->flags.dirty ) {
int rc = write_cache_item( r );
if( rc )
return rc;
if( !unused )
unused = r;
r->flags.used = 0;
cache_entries--;
if( !--n )
break;
}
}
if( !opt.lock_once ) {
if( !release_dotlock( lockhandle ) )
is_locked = 0;
}
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assert( unused );
r = unused;
r->flags.used = 1;
r->recno = recno;
memcpy( r->data, data, TRUST_RECORD_LEN );
r->flags.dirty = 1;
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cache_is_dirty = 1;
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cache_entries++;
return 0;
}
BUG();
}
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int
tdbio_is_dirty()
{
return cache_is_dirty;
}
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/****************
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* Flush the cache. This cannot be used while in a transaction.
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*/
int
tdbio_sync()
{
CACHE_CTRL r;
int did_lock = 0;
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if( db_fd == -1 )
open_db();
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if( in_transaction )
log_bug("tdbio: syncing while in transaction\n");
if( !cache_is_dirty )
return 0;
if( !is_locked ) {
if( make_dotlock( lockhandle, -1 ) )
log_fatal("can't acquire lock - giving up\n");
else
is_locked = 1;
did_lock = 1;
}
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for( r = cache_list; r; r = r->next ) {
if( r->flags.used && r->flags.dirty ) {
int rc = write_cache_item( r );
if( rc )
return rc;
}
}
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cache_is_dirty = 0;
if( did_lock && !opt.lock_once ) {
if( !release_dotlock( lockhandle ) )
is_locked = 0;
}
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return 0;
}
/****************
* Simple transactions system:
* Everything between begin_transaction and end/cancel_transaction
* is not immediatly written but at the time of end_transaction.
*
*/
int
tdbio_begin_transaction()
{
int rc;
if( in_transaction )
log_bug("tdbio: nested transactions\n");
/* flush everything out */
rc = tdbio_sync();
if( rc )
return rc;
in_transaction = 1;
return 0;
}
int
tdbio_end_transaction()
{
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int rc;
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if( !in_transaction )
log_bug("tdbio: no active transaction\n");
if( !is_locked ) {
if( make_dotlock( lockhandle, -1 ) )
log_fatal("can't acquire lock - giving up\n");
else
is_locked = 1;
}
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block_all_signals();
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in_transaction = 0;
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rc = tdbio_sync();
unblock_all_signals();
if( !opt.lock_once ) {
if( !release_dotlock( lockhandle ) )
is_locked = 0;
}
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return rc;
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}
int
tdbio_cancel_transaction()
{
CACHE_CTRL r;
if( !in_transaction )
log_bug("tdbio: no active transaction\n");
/* remove all dirty marked entries, so that the original ones
* are read back the next time */
if( cache_is_dirty ) {
for( r = cache_list; r; r = r->next ) {
if( r->flags.used && r->flags.dirty ) {
r->flags.used = 0;
cache_entries--;
}
}
cache_is_dirty = 0;
}
in_transaction = 0;
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return 0;
}
/********************************************************
**************** cached I/O functions ******************
********************************************************/
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static void
cleanup(void)
{
if( is_locked ) {
if( !release_dotlock(lockhandle) )
is_locked = 0;
}
}
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int
tdbio_set_dbname( const char *new_dbname, int create )
{
char *fname;
static int initialized = 0;
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if( !initialized ) {
atexit( cleanup );
initialized = 1;
}
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fname = new_dbname? m_strdup( new_dbname )
: make_filename(opt.homedir, "trustdb.gpg", NULL );
if( access( fname, R_OK ) ) {
if( errno != ENOENT ) {
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log_error( _("%s: can't access: %s\n"), fname, strerror(errno) );
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m_free(fname);
return G10ERR_TRUSTDB;
}
if( create ) {
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FILE *fp;
TRUSTREC rec;
int rc;
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char *p = strrchr( fname, '/' );
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assert(p);
*p = 0;
if( access( fname, F_OK ) ) {
try_make_homedir( fname );
log_fatal( _("%s: directory does not exist!\n"), fname );
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}
*p = '/';
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fp =fopen( fname, "wb" );
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if( !fp )
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log_fatal( _("%s: can't create: %s\n"), fname, strerror(errno) );
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fclose(fp);
m_free(db_name);
db_name = fname;
#ifdef HAVE_DOSISH_SYSTEM
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db_fd = open( db_name, O_RDWR | O_BINARY );
#else
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db_fd = open( db_name, O_RDWR );
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#endif
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if( db_fd == -1 )
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log_fatal( _("%s: can't open: %s\n"), db_name, strerror(errno) );
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if( !lockhandle )
lockhandle = create_dotlock( db_name );
if( !lockhandle )
log_fatal( _("%s: can't create lock\n"), db_name );
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memset( &rec, 0, sizeof rec );
rec.r.ver.version = 2;
rec.r.ver.created = make_timestamp();
rec.r.ver.marginals = opt.marginals_needed;
rec.r.ver.completes = opt.completes_needed;
rec.r.ver.cert_depth = opt.max_cert_depth;
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rec.rectype = RECTYPE_VER;
rec.recnum = 0;
rc = tdbio_write_record( &rec );
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if( !rc )
tdbio_sync();
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if( rc )
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log_fatal( _("%s: failed to create version record: %s"),
fname, g10_errstr(rc));
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/* and read again to check that we are okay */
if( tdbio_read_record( 0, &rec, RECTYPE_VER ) )
log_fatal( _("%s: invalid trustdb created\n"), db_name );
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if( !opt.quiet )
log_info(_("%s: trustdb created\n"), db_name);
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return 0;
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}
}
m_free(db_name);
db_name = fname;
return 0;
}
const char *
tdbio_get_dbname()
{
return db_name;
}
static void
open_db()
{
TRUSTREC rec;
assert( db_fd == -1 );
if( !lockhandle )
lockhandle = create_dotlock( db_name );
if( !lockhandle )
log_fatal( _("%s: can't create lock\n"), db_name );
#ifdef HAVE_DOSISH_SYSTEM
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db_fd = open( db_name, O_RDWR | O_BINARY );
#else
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db_fd = open( db_name, O_RDWR );
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#endif
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if( db_fd == -1 )
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log_fatal( _("%s: can't open: %s\n"), db_name, strerror(errno) );
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if( tdbio_read_record( 0, &rec, RECTYPE_VER ) )
log_fatal( _("%s: invalid trustdb\n"), db_name );
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}
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/****************
* Make a hashtable: type 0 = key hash, 1 = sdir hash
*/
static void
create_hashtable( TRUSTREC *vr, int type )
{
TRUSTREC rec;
off_t offset;
ulong recnum;
int i, n, rc;
offset = lseek( db_fd, 0, SEEK_END );
if( offset == -1 )
log_fatal("trustdb: lseek to end failed: %s\n", strerror(errno) );
recnum = offset / TRUST_RECORD_LEN;
assert(recnum); /* this is will never be the first record */
if( !type )
vr->r.ver.keyhashtbl = recnum;
else
vr->r.ver.sdirhashtbl = recnum;
/* Now write the records */
n = (256+ITEMS_PER_HTBL_RECORD-1) / ITEMS_PER_HTBL_RECORD;
for(i=0; i < n; i++, recnum++ ) {
memset( &rec, 0, sizeof rec );
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rec.rectype = RECTYPE_HTBL;
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rec.recnum = recnum;
rc = tdbio_write_record( &rec );
if( rc )
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log_fatal( _("%s: failed to create hashtable: %s\n"),
db_name, g10_errstr(rc));
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}
/* update the version record */
rc = tdbio_write_record( vr );
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if( !rc )
rc = tdbio_sync();
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if( rc )
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log_fatal( _("%s: error updating version record: %s\n"),
db_name, g10_errstr(rc));
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}
int
tdbio_db_matches_options()
{
static int yes_no = -1;
if( yes_no == -1 ) {
TRUSTREC vr;
int rc;
rc = tdbio_read_record( 0, &vr, RECTYPE_VER );
if( rc )
log_fatal( _("%s: error reading version record: %s\n"),
db_name, g10_errstr(rc) );
if( !vr.r.ver.marginals && !vr.r.ver.completes
&& !vr.r.ver.cert_depth )
{ /* special hack for trustdbs created by old versions of GnuPG */
vr.r.ver.marginals = opt.marginals_needed;
vr.r.ver.completes = opt.completes_needed;
vr.r.ver.cert_depth = opt.max_cert_depth;
rc = tdbio_write_record( &vr );
if( !rc && !in_transaction )
rc = tdbio_sync();
if( rc )
log_error( _("%s: error writing version record: %s\n"),
db_name, g10_errstr(rc) );
}
yes_no = vr.r.ver.marginals == opt.marginals_needed
&& vr.r.ver.completes == opt.completes_needed
&& vr.r.ver.cert_depth == opt.max_cert_depth;
}
return yes_no;
}
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/****************
* Return the modifiy stamp.
* if modify_down is true, the modify_down stamp will be
* returned, otherwise the modify_up stamp.
*/
ulong
tdbio_read_modify_stamp( int modify_down )
{
TRUSTREC vr;
int rc;
ulong mod;
rc = tdbio_read_record( 0, &vr, RECTYPE_VER );
if( rc )
log_fatal( _("%s: error reading version record: %s\n"),
db_name, g10_errstr(rc) );
mod = modify_down? vr.r.ver.mod_down : vr.r.ver.mod_up;
/* Always return at least 1 to make comparison easier;
* this is still far back in history (before Led Zeppelin III :-) */
return mod ? mod : 1;
}
void
tdbio_write_modify_stamp( int up, int down )
{
TRUSTREC vr;
int rc;
ulong stamp;
if( !(up || down) )
return;
rc = tdbio_read_record( 0, &vr, RECTYPE_VER );
if( rc )
log_fatal( _("%s: error reading version record: %s\n"),
db_name, g10_errstr(rc) );
stamp = make_timestamp();
if( down )
vr.r.ver.mod_down = stamp;
if( up )
vr.r.ver.mod_up = stamp;
rc = tdbio_write_record( &vr );
if( rc )
log_fatal( _("%s: error writing version record: %s\n"),
db_name, g10_errstr(rc) );
}
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/****************
* Return the record number of the keyhash tbl or create a new one.
*/
static ulong
get_keyhashrec(void)
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{
static ulong keyhashtbl; /* record number of the key hashtable */
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if( !keyhashtbl ) {
TRUSTREC vr;
int rc;
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rc = tdbio_read_record( 0, &vr, RECTYPE_VER );
if( rc )
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log_fatal( _("%s: error reading version record: %s\n"),
db_name, g10_errstr(rc) );
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if( !vr.r.ver.keyhashtbl )
create_hashtable( &vr, 0 );
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keyhashtbl = vr.r.ver.keyhashtbl;
}
return keyhashtbl;
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}
/****************
* Return the record number of the shadow direcory hash table
* or create a new one.
*/
static ulong
get_sdirhashrec(void)
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{
static ulong sdirhashtbl; /* record number of the hashtable */
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if( !sdirhashtbl ) {
TRUSTREC vr;
int rc;
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rc = tdbio_read_record( 0, &vr, RECTYPE_VER );
if( rc )
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log_fatal( _("%s: error reading version record: %s\n"),
db_name, g10_errstr(rc) );
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if( !vr.r.ver.sdirhashtbl )
create_hashtable( &vr, 1 );
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sdirhashtbl = vr.r.ver.sdirhashtbl;
}
return sdirhashtbl;
1998-07-29 19:35:05 +00:00
}
/****************
1998-10-12 20:16:38 +00:00
* Update a hashtable.
* table gives the start of the table, key and keylen is the key,
* newrecnum is the record number to insert.
1998-07-29 19:35:05 +00:00
*/
static int
1998-10-12 20:16:38 +00:00
upd_hashtable( ulong table, byte *key, int keylen, ulong newrecnum )
1998-07-29 19:35:05 +00:00
{
TRUSTREC lastrec, rec;
ulong hashrec, item;
int msb;
int level=0;
int rc, i;
1998-10-12 20:16:38 +00:00
hashrec = table;
1998-07-29 19:35:05 +00:00
next_level:
1998-10-12 20:16:38 +00:00
msb = key[level];
1998-07-29 19:35:05 +00:00
hashrec += msb / ITEMS_PER_HTBL_RECORD;
rc = tdbio_read_record( hashrec, &rec, RECTYPE_HTBL );
if( rc ) {
1998-10-12 20:16:38 +00:00
log_error( db_name, "upd_hashtable: read failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
return rc;
}
item = rec.r.htbl.item[msb % ITEMS_PER_HTBL_RECORD];
1998-10-12 20:16:38 +00:00
if( !item ) { /* insert a new item into the hash table */
rec.r.htbl.item[msb % ITEMS_PER_HTBL_RECORD] = newrecnum;
1998-07-29 19:35:05 +00:00
rc = tdbio_write_record( &rec );
if( rc ) {
1998-10-12 20:16:38 +00:00
log_error( db_name, "upd_hashtable: write htbl failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
return rc;
}
}
1998-10-12 20:16:38 +00:00
else if( item != newrecnum ) { /* must do an update */
1998-07-29 19:35:05 +00:00
lastrec = rec;
rc = tdbio_read_record( item, &rec, 0 );
if( rc ) {
1998-10-16 16:00:17 +00:00
log_error( "upd_hashtable: read item failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
return rc;
}
1998-10-16 16:00:17 +00:00
1998-07-29 19:35:05 +00:00
if( rec.rectype == RECTYPE_HTBL ) {
hashrec = item;
level++;
1998-10-12 20:16:38 +00:00
if( level >= keylen ) {
1998-10-16 16:00:17 +00:00
log_error( "hashtable has invalid indirections.\n");
1998-07-29 19:35:05 +00:00
return G10ERR_TRUSTDB;
}
goto next_level;
}
else if( rec.rectype == RECTYPE_HLST ) { /* extend list */
/* see whether the key is already in this list */
for(;;) {
for(i=0; i < ITEMS_PER_HLST_RECORD; i++ ) {
1998-10-12 20:16:38 +00:00
if( rec.r.hlst.rnum[i] == newrecnum ) {
return 0; /* okay, already in the list */
1998-07-29 19:35:05 +00:00
}
}
if( rec.r.hlst.next ) {
rc = tdbio_read_record( rec.r.hlst.next,
1998-10-12 20:16:38 +00:00
&rec, RECTYPE_HLST);
1998-07-29 19:35:05 +00:00
if( rc ) {
1998-10-16 16:00:17 +00:00
log_error( "scan keyhashtbl read hlst failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
return rc;
}
}
else
break; /* not there */
}
/* find the next free entry and put it in */
for(;;) {
for(i=0; i < ITEMS_PER_HLST_RECORD; i++ ) {
if( !rec.r.hlst.rnum[i] ) {
1998-10-12 20:16:38 +00:00
rec.r.hlst.rnum[i] = newrecnum;
1998-07-29 19:35:05 +00:00
rc = tdbio_write_record( &rec );
if( rc )
1998-10-16 16:00:17 +00:00
log_error( "upd_hashtable: write hlst failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
1998-10-12 20:16:38 +00:00
return rc; /* done */
1998-07-29 19:35:05 +00:00
}
}
if( rec.r.hlst.next ) {
rc = tdbio_read_record( rec.r.hlst.next,
&rec, RECTYPE_HLST );
if( rc ) {
1998-10-16 16:00:17 +00:00
log_error( "upd_hashtable: read hlst failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
return rc;
}
}
else { /* add a new list record */
rec.r.hlst.next = item = tdbio_new_recnum();
rc = tdbio_write_record( &rec );
if( rc ) {
1998-10-16 16:00:17 +00:00
log_error( "upd_hashtable: write hlst failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
return rc;
}
memset( &rec, 0, sizeof rec );
rec.rectype = RECTYPE_HLST;
rec.recnum = item;
1998-10-12 20:16:38 +00:00
rec.r.hlst.rnum[0] = newrecnum;
rc = tdbio_write_record( &rec );
1998-07-29 19:35:05 +00:00
if( rc )
1998-10-16 16:00:17 +00:00
log_error( "upd_hashtable: write ext hlst failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
1998-10-12 20:16:38 +00:00
return rc; /* done */
1998-07-29 19:35:05 +00:00
}
1998-10-12 20:16:38 +00:00
} /* end loop over hlst slots */
1998-07-29 19:35:05 +00:00
}
1998-10-12 20:16:38 +00:00
else if( rec.rectype == RECTYPE_KEY
1998-10-16 16:00:17 +00:00
|| rec.rectype == RECTYPE_DIR
1998-10-12 20:16:38 +00:00
|| rec.rectype == RECTYPE_SDIR ) { /* insert a list record */
if( rec.recnum == newrecnum ) {
1998-07-29 19:35:05 +00:00
return 0;
}
item = rec.recnum; /* save number of key record */
memset( &rec, 0, sizeof rec );
rec.rectype = RECTYPE_HLST;
rec.recnum = tdbio_new_recnum();
rec.r.hlst.rnum[0] = item; /* old keyrecord */
1998-10-12 20:16:38 +00:00
rec.r.hlst.rnum[1] = newrecnum; /* and new one */
1998-07-29 19:35:05 +00:00
rc = tdbio_write_record( &rec );
if( rc ) {
1998-10-16 16:00:17 +00:00
log_error( "upd_hashtable: write new hlst failed: %s\n",
1998-07-29 19:35:05 +00:00
g10_errstr(rc) );
return rc;
}
/* update the hashtable record */
lastrec.r.htbl.item[msb % ITEMS_PER_HTBL_RECORD] = rec.recnum;
rc = tdbio_write_record( &lastrec );
if( rc )
1998-10-16 16:00:17 +00:00
log_error( "upd_hashtable: update htbl failed: %s\n",
1998-10-12 20:16:38 +00:00
g10_errstr(rc) );
1998-07-29 19:35:05 +00:00
return rc; /* ready */
}
else {
log_error( "hashtbl %lu: %lu/%d points to an invalid record %lu\n",
table, hashrec, (msb % ITEMS_PER_HTBL_RECORD), item);
list_trustdb(NULL);
1998-07-29 19:35:05 +00:00
return G10ERR_TRUSTDB;
}
}
return 0;
}
/****************
* Drop an entry from a hashtable
* table gives the start of the table, key and keylen is the key,
*/
static int
drop_from_hashtable( ulong table, byte *key, int keylen, ulong recnum )
{
TRUSTREC rec;
ulong hashrec, item;
int msb;
int level=0;
int rc, i;
hashrec = table;
next_level:
msb = key[level];
hashrec += msb / ITEMS_PER_HTBL_RECORD;
rc = tdbio_read_record( hashrec, &rec, RECTYPE_HTBL );
if( rc ) {
log_error( db_name, "drop_from_hashtable: read failed: %s\n",
g10_errstr(rc) );
return rc;
}
item = rec.r.htbl.item[msb % ITEMS_PER_HTBL_RECORD];
if( !item ) /* not found - forget about it */
return 0;
if( item == recnum ) { /* tables points direct to the record */
rec.r.htbl.item[msb % ITEMS_PER_HTBL_RECORD] = 0;
rc = tdbio_write_record( &rec );
if( rc )
log_error( db_name, "drop_from_hashtable: write htbl failed: %s\n",
g10_errstr(rc) );
return rc;
}
rc = tdbio_read_record( item, &rec, 0 );
if( rc ) {
log_error( "drop_from_hashtable: read item failed: %s\n",
g10_errstr(rc) );
return rc;
}
if( rec.rectype == RECTYPE_HTBL ) {
hashrec = item;
level++;
if( level >= keylen ) {
log_error( "hashtable has invalid indirections.\n");
return G10ERR_TRUSTDB;
}
goto next_level;
}
if( rec.rectype == RECTYPE_HLST ) {
for(;;) {
for(i=0; i < ITEMS_PER_HLST_RECORD; i++ ) {
if( rec.r.hlst.rnum[i] == recnum ) {
rec.r.hlst.rnum[i] = 0; /* drop */
rc = tdbio_write_record( &rec );
if( rc )
log_error( db_name, "drop_from_hashtable: write htbl failed: %s\n",
g10_errstr(rc) );
return rc;
}
}
if( rec.r.hlst.next ) {
rc = tdbio_read_record( rec.r.hlst.next,
&rec, RECTYPE_HLST);
if( rc ) {
log_error( "scan keyhashtbl read hlst failed: %s\n",
g10_errstr(rc) );
return rc;
}
}
else
return 0; /* key not in table */
}
}
log_error( "hashtbl %lu: %lu/%d points to wrong record %lu\n",
table, hashrec, (msb % ITEMS_PER_HTBL_RECORD), item);
return G10ERR_TRUSTDB;
}
1998-07-29 19:35:05 +00:00
1998-10-12 20:16:38 +00:00
/****************
* Lookup a record via the hashtable tablewith key/keylen and return the
* result in rec. cmp() should return if the record is the desired one.
* Returns -1 if not found, 0 if found or another errocode
*/
static int
lookup_hashtable( ulong table, const byte *key, size_t keylen,
int (*cmpfnc)(void*, const TRUSTREC *), void *cmpdata,
TRUSTREC *rec )
{
int rc;
ulong hashrec, item;
int msb;
int level=0;
hashrec = table;
next_level:
msb = key[level];
hashrec += msb / ITEMS_PER_HTBL_RECORD;
rc = tdbio_read_record( hashrec, rec, RECTYPE_HTBL );
if( rc ) {
log_error( db_name, "lookup_hashtable failed: %s\n", g10_errstr(rc) );
return rc;
}
item = rec->r.htbl.item[msb % ITEMS_PER_HTBL_RECORD];
if( !item )
return -1; /* not found */
rc = tdbio_read_record( item, rec, 0 );
if( rc ) {
log_error( db_name, "hashtable read failed: %s\n", g10_errstr(rc) );
return rc;
}
if( rec->rectype == RECTYPE_HTBL ) {
hashrec = item;
level++;
if( level >= keylen ) {
log_error( db_name, "hashtable has invalid indirections\n");
return G10ERR_TRUSTDB;
}
goto next_level;
}
else if( rec->rectype == RECTYPE_HLST ) {
for(;;) {
int i;
for(i=0; i < ITEMS_PER_HLST_RECORD; i++ ) {
if( rec->r.hlst.rnum[i] ) {
TRUSTREC tmp;
rc = tdbio_read_record( rec->r.hlst.rnum[i], &tmp, 0 );
if( rc ) {
log_error( "lookup_hashtable: read item failed: %s\n",
g10_errstr(rc) );
return rc;
}
if( (*cmpfnc)( cmpdata, &tmp ) ) {
*rec = tmp;
return 0;
}
}
}
if( rec->r.hlst.next ) {
rc = tdbio_read_record( rec->r.hlst.next, rec, RECTYPE_HLST );
if( rc ) {
log_error( "lookup_hashtable: read hlst failed: %s\n",
g10_errstr(rc) );
return rc;
}
}
else
return -1; /* not found */
}
}
if( (*cmpfnc)( cmpdata, rec ) )
return 0; /* really found */
return -1; /* no: not found */
}
/****************
* Update the key hashtbl or create the table if it does not exist
*/
static int
update_keyhashtbl( TRUSTREC *kr )
{
return upd_hashtable( get_keyhashrec(),
kr->r.key.fingerprint,
kr->r.key.fingerprint_len, kr->recnum );
}
/****************
* Update the shadow dir hashtbl or create the table if it does not exist
*/
static int
update_sdirhashtbl( TRUSTREC *sr )
{
byte key[8];
u32tobuf( key , sr->r.sdir.keyid[0] );
u32tobuf( key+4 , sr->r.sdir.keyid[1] );
return upd_hashtable( get_sdirhashrec(), key, 8, sr->recnum );
}
/****************
* Drop the records from the key-hashtbl
*/
static int
drop_from_keyhashtbl( TRUSTREC *kr )
{
return drop_from_hashtable( get_keyhashrec(),
kr->r.key.fingerprint,
kr->r.key.fingerprint_len, kr->recnum );
}
/****************
* Drop record drom the shadow dir hashtbl
*/
static int
drop_from_sdirhashtbl( TRUSTREC *sr )
{
byte key[8];
u32tobuf( key , sr->r.sdir.keyid[0] );
u32tobuf( key+4 , sr->r.sdir.keyid[1] );
return drop_from_hashtable( get_sdirhashrec(), key, 8, sr->recnum );
}
1998-10-12 20:16:38 +00:00
1998-07-09 13:37:17 +00:00
void
1998-07-21 12:53:38 +00:00
tdbio_dump_record( TRUSTREC *rec, FILE *fp )
1998-07-09 13:37:17 +00:00
{
1998-07-29 19:35:05 +00:00
int i;
1998-07-21 12:53:38 +00:00
ulong rnum = rec->recnum;
1998-08-05 16:51:59 +00:00
byte *p;
1998-07-09 13:37:17 +00:00
1998-07-21 12:53:38 +00:00
fprintf(fp, "rec %5lu, ", rnum );
1998-07-09 13:37:17 +00:00
switch( rec->rectype ) {
1998-10-07 13:30:43 +00:00
case 0: fprintf(fp, "blank\n");
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_VER: fprintf(fp,
"version, kd=%lu, sd=%lu, free=%lu, m/c/d=%d/%d/%d down=%s",
1998-10-12 20:16:38 +00:00
rec->r.ver.keyhashtbl, rec->r.ver.sdirhashtbl,
rec->r.ver.firstfree,
rec->r.ver.marginals,
rec->r.ver.completes,
rec->r.ver.cert_depth,
strtimestamp(rec->r.ver.mod_down) );
fprintf(fp, ", up=%s\n", strtimestamp(rec->r.ver.mod_up) );
1998-10-07 13:30:43 +00:00
break;
case RECTYPE_FREE: fprintf(fp, "free, next=%lu\n", rec->r.free.next );
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_DIR:
fprintf(fp, "dir %lu, keys=%lu, uids=%lu, t=%02x",
1998-07-14 17:10:28 +00:00
rec->r.dir.lid,
rec->r.dir.keylist,
rec->r.dir.uidlist,
rec->r.dir.ownertrust );
if( rec->r.dir.valcheck )
fprintf( fp, ", v=%02x/%s", rec->r.dir.validity,
strtimestamp(rec->r.dir.valcheck) );
if( rec->r.dir.checkat )
fprintf( fp, ", a=%s", strtimestamp(rec->r.dir.checkat) );
1998-10-21 17:34:36 +00:00
if( rec->r.dir.dirflags & DIRF_CHECKED ) {
if( rec->r.dir.dirflags & DIRF_VALID )
fputs(", valid", fp );
if( rec->r.dir.dirflags & DIRF_EXPIRED )
fputs(", expired", fp );
if( rec->r.dir.dirflags & DIRF_REVOKED )
fputs(", revoked", fp );
if( rec->r.dir.dirflags & DIRF_NEWKEYS )
fputs(", newkeys", fp );
1998-10-21 17:34:36 +00:00
}
1998-07-09 13:37:17 +00:00
putc('\n', fp);
break;
1998-07-14 17:10:28 +00:00
case RECTYPE_KEY:
fprintf(fp, "key %lu, n=%lu a=%d ",
1998-07-14 17:10:28 +00:00
rec->r.key.lid,
rec->r.key.next,
1998-07-29 19:35:05 +00:00
rec->r.key.pubkey_algo );
for(i=0; i < rec->r.key.fingerprint_len; i++ )
fprintf(fp, "%02X", rec->r.key.fingerprint[i] );
1998-10-21 17:34:36 +00:00
if( rec->r.key.keyflags & KEYF_CHECKED ) {
if( rec->r.key.keyflags & KEYF_VALID )
fputs(", valid", fp );
if( rec->r.key.keyflags & KEYF_EXPIRED )
fputs(", expired", fp );
if( rec->r.key.keyflags & KEYF_REVOKED )
fputs(", revoked", fp );
}
1998-07-21 12:53:38 +00:00
putc('\n', fp);
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_UID:
1998-07-21 12:53:38 +00:00
fprintf(fp, "uid %lu, next=%lu, pref=%lu, sig=%lu, hash=%02X%02X",
1998-07-14 17:10:28 +00:00
rec->r.uid.lid,
rec->r.uid.next,
rec->r.uid.prefrec,
rec->r.uid.siglist,
rec->r.uid.namehash[18], rec->r.uid.namehash[19]);
fprintf( fp, ", v=%02x", rec->r.uid.validity );
1998-10-21 17:34:36 +00:00
if( rec->r.uid.uidflags & UIDF_CHECKED ) {
if( rec->r.uid.uidflags & UIDF_VALID )
fputs(", valid", fp );
if( rec->r.uid.uidflags & UIDF_REVOKED )
fputs(", revoked", fp );
}
1998-07-21 12:53:38 +00:00
putc('\n', fp);
1998-07-09 13:37:17 +00:00
break;
1998-07-14 17:10:28 +00:00
case RECTYPE_PREF:
1998-08-05 16:51:59 +00:00
fprintf(fp, "pref %lu, next=%lu,",
rec->r.pref.lid, rec->r.pref.next);
for(i=0,p=rec->r.pref.data; i < ITEMS_PER_PREF_RECORD; i+=2,p+=2 ) {
if( *p )
fprintf(fp, " %c%d", *p == PREFTYPE_SYM ? 'S' :
*p == PREFTYPE_HASH ? 'H' :
*p == PREFTYPE_COMPR ? 'Z' : '?', p[1]);
}
putc('\n', fp);
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_SIG:
1998-07-29 19:35:05 +00:00
fprintf(fp, "sig %lu, next=%lu,",
1998-07-14 17:10:28 +00:00
rec->r.sig.lid, rec->r.sig.next );
1998-07-29 19:35:05 +00:00
for(i=0; i < SIGS_PER_RECORD; i++ ) {
1998-10-21 17:34:36 +00:00
if( rec->r.sig.sig[i].lid ) {
fprintf(fp, " %lu:", rec->r.sig.sig[i].lid );
if( rec->r.sig.sig[i].flag & SIGF_CHECKED ) {
fprintf(fp,"%c%c%c",
(rec->r.sig.sig[i].flag & SIGF_VALID) ? 'V':
(rec->r.sig.sig[i].flag & SIGF_IGNORED) ? 'I':'-',
1998-10-21 17:34:36 +00:00
(rec->r.sig.sig[i].flag & SIGF_EXPIRED) ? 'E':'-',
(rec->r.sig.sig[i].flag & SIGF_REVOKED) ? 'R':'-');
}
else if( rec->r.sig.sig[i].flag & SIGF_NOPUBKEY)
fputs("?--", fp);
else
fputs("---", fp);
}
1998-07-09 13:37:17 +00:00
}
1998-07-29 19:35:05 +00:00
putc('\n', fp);
1998-07-09 13:37:17 +00:00
break;
1998-10-12 20:16:38 +00:00
case RECTYPE_SDIR:
fprintf(fp, "sdir %lu, keyid=%08lX%08lX, algo=%d, hint=%lu\n",
rec->r.sdir.lid,
(ulong)rec->r.sdir.keyid[0],
(ulong)rec->r.sdir.keyid[1],
rec->r.sdir.pubkey_algo,
(ulong)rec->r.sdir.hintlist );
break;
1998-07-14 17:10:28 +00:00
case RECTYPE_CACH:
fprintf(fp, "cach\n");
break;
case RECTYPE_HTBL:
1998-07-29 19:35:05 +00:00
fprintf(fp, "htbl,");
for(i=0; i < ITEMS_PER_HTBL_RECORD; i++ )
fprintf(fp, " %lu", rec->r.htbl.item[i] );
putc('\n', fp);
1998-07-14 17:10:28 +00:00
break;
1998-07-21 12:53:38 +00:00
case RECTYPE_HLST:
1998-07-29 19:35:05 +00:00
fprintf(fp, "hlst, next=%lu,", rec->r.hlst.next );
for(i=0; i < ITEMS_PER_HLST_RECORD; i++ )
fprintf(fp, " %lu", rec->r.hlst.rnum[i] );
putc('\n', fp);
1998-07-14 17:10:28 +00:00
break;
1998-07-09 13:37:17 +00:00
default:
1998-07-21 12:53:38 +00:00
fprintf(fp, "unknown type %d\n", rec->rectype );
1998-07-09 13:37:17 +00:00
break;
}
}
/****************
* read the record with number recnum
* returns: -1 on error, 0 on success
*/
int
tdbio_read_record( ulong recnum, TRUSTREC *rec, int expected )
{
1998-10-16 16:00:17 +00:00
byte readbuf[TRUST_RECORD_LEN];
const byte *buf, *p;
1998-07-09 13:37:17 +00:00
int rc = 0;
int n, i;
if( db_fd == -1 )
open_db();
1998-10-16 16:00:17 +00:00
buf = get_record_from_cache( recnum );
if( !buf ) {
if( lseek( db_fd, recnum * TRUST_RECORD_LEN, SEEK_SET ) == -1 ) {
log_error(_("trustdb: lseek failed: %s\n"), strerror(errno) );
return G10ERR_READ_FILE;
}
n = read( db_fd, readbuf, TRUST_RECORD_LEN);
if( !n ) {
return -1; /* eof */
}
else if( n != TRUST_RECORD_LEN ) {
log_error(_("trustdb: read failed (n=%d): %s\n"), n,
strerror(errno) );
return G10ERR_READ_FILE;
}
buf = readbuf;
1998-07-09 13:37:17 +00:00
}
1998-07-15 18:05:01 +00:00
rec->recnum = recnum;
1998-10-12 20:16:38 +00:00
rec->dirty = 0;
1998-07-09 13:37:17 +00:00
p = buf;
rec->rectype = *p++;
if( expected && rec->rectype != expected ) {
log_error("%lu: read expected rec type %d, got %d\n",
recnum, expected, rec->rectype );
return G10ERR_TRUSTDB;
}
1998-07-29 19:35:05 +00:00
p++; /* skip reserved byte */
1998-07-09 13:37:17 +00:00
switch( rec->rectype ) {
1998-07-29 19:35:05 +00:00
case 0: /* unused (free) record */
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_VER: /* version record */
1998-07-14 17:10:28 +00:00
if( memcmp(buf+1, "gpg", 3 ) ) {
1998-10-21 17:34:36 +00:00
log_error( _("%s: not a trustdb file\n"), db_name );
1998-07-09 13:37:17 +00:00
rc = G10ERR_TRUSTDB;
}
1998-07-29 19:35:05 +00:00
p += 2; /* skip "pgp" */
1998-07-09 13:37:17 +00:00
rec->r.ver.version = *p++;
rec->r.ver.marginals = *p++;
rec->r.ver.completes = *p++;
rec->r.ver.cert_depth = *p++;
1998-07-29 19:35:05 +00:00
p += 4; /* lock flags */
1998-07-09 13:37:17 +00:00
rec->r.ver.created = buftoulong(p); p += 4;
rec->r.ver.mod_down = buftoulong(p); p += 4;
rec->r.ver.mod_up = buftoulong(p); p += 4;
1998-07-29 19:35:05 +00:00
rec->r.ver.keyhashtbl=buftoulong(p); p += 4;
1998-10-07 13:30:43 +00:00
rec->r.ver.firstfree =buftoulong(p); p += 4;
1998-10-12 20:16:38 +00:00
rec->r.ver.sdirhashtbl =buftoulong(p); p += 4;
1998-07-09 13:37:17 +00:00
if( recnum ) {
1998-10-21 17:34:36 +00:00
log_error( _("%s: version record with recnum %lu\n"), db_name,
1998-07-09 13:37:17 +00:00
(ulong)recnum );
rc = G10ERR_TRUSTDB;
}
1998-07-29 19:35:05 +00:00
else if( rec->r.ver.version != 2 ) {
1998-10-21 17:34:36 +00:00
log_error( _("%s: invalid file version %d\n"), db_name,
1998-07-09 13:37:17 +00:00
rec->r.ver.version );
rc = G10ERR_TRUSTDB;
}
break;
1998-10-07 13:30:43 +00:00
case RECTYPE_FREE:
rec->r.free.next = buftoulong(p); p += 4;
break;
1998-07-09 13:37:17 +00:00
case RECTYPE_DIR: /*directory record */
1998-07-14 17:10:28 +00:00
rec->r.dir.lid = buftoulong(p); p += 4;
rec->r.dir.keylist = buftoulong(p); p += 4;
rec->r.dir.uidlist = buftoulong(p); p += 4;
rec->r.dir.cacherec = buftoulong(p); p += 4;
rec->r.dir.ownertrust = *p++;
1998-07-21 12:53:38 +00:00
rec->r.dir.dirflags = *p++;
rec->r.dir.validity = *p++;
rec->r.dir.valcheck = buftoulong(p); p += 4;
rec->r.dir.checkat = buftoulong(p); p += 4;
switch( rec->r.dir.validity ) {
case 0:
case TRUST_UNDEFINED:
case TRUST_NEVER:
case TRUST_MARGINAL:
case TRUST_FULLY:
case TRUST_ULTIMATE:
break;
default:
log_info("lid %lu: invalid validity value - cleared\n", recnum);
}
1998-07-14 17:10:28 +00:00
if( rec->r.dir.lid != recnum ) {
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log_error( "%s: dir LID != recnum (%lu,%lu)\n",
db_name, rec->r.dir.lid, (ulong)recnum );
1998-07-09 13:37:17 +00:00
rc = G10ERR_TRUSTDB;
}
break;
case RECTYPE_KEY: /* public key record */
1998-07-14 17:10:28 +00:00
rec->r.key.lid = buftoulong(p); p += 4;
rec->r.key.next = buftoulong(p); p += 4;
1998-07-21 12:53:38 +00:00
p += 7;
rec->r.key.keyflags = *p++;
1998-07-09 13:37:17 +00:00
rec->r.key.pubkey_algo = *p++;
rec->r.key.fingerprint_len = *p++;
if( rec->r.key.fingerprint_len < 1 || rec->r.key.fingerprint_len > 20 )
rec->r.key.fingerprint_len = 20;
1998-07-14 17:10:28 +00:00
memcpy( rec->r.key.fingerprint, p, 20);
1998-07-09 13:37:17 +00:00
break;
1998-07-14 17:10:28 +00:00
case RECTYPE_UID: /* user id record */
rec->r.uid.lid = buftoulong(p); p += 4;
rec->r.uid.next = buftoulong(p); p += 4;
rec->r.uid.prefrec = buftoulong(p); p += 4;
rec->r.uid.siglist = buftoulong(p); p += 4;
1998-07-21 12:53:38 +00:00
rec->r.uid.uidflags = *p++;
rec->r.uid.validity = *p++;
switch( rec->r.uid.validity ) {
case 0:
case TRUST_UNDEFINED:
case TRUST_NEVER:
case TRUST_MARGINAL:
case TRUST_FULLY:
case TRUST_ULTIMATE:
break;
default:
log_info("lid %lu: invalid validity value - cleared\n", recnum);
}
1998-07-14 17:10:28 +00:00
memcpy( rec->r.uid.namehash, p, 20);
break;
case RECTYPE_PREF: /* preference record */
rec->r.pref.lid = buftoulong(p); p += 4;
rec->r.pref.next = buftoulong(p); p += 4;
1998-08-05 16:51:59 +00:00
memcpy( rec->r.pref.data, p, 30 );
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_SIG:
1998-07-14 17:10:28 +00:00
rec->r.sig.lid = buftoulong(p); p += 4;
rec->r.sig.next = buftoulong(p); p += 4;
1998-07-09 13:37:17 +00:00
for(i=0; i < SIGS_PER_RECORD; i++ ) {
1998-07-14 17:10:28 +00:00
rec->r.sig.sig[i].lid = buftoulong(p); p += 4;
1998-07-09 13:37:17 +00:00
rec->r.sig.sig[i].flag = *p++;
}
break;
1998-10-12 20:16:38 +00:00
case RECTYPE_SDIR: /* shadow directory record */
rec->r.sdir.lid = buftoulong(p); p += 4;
rec->r.sdir.keyid[0]= buftou32(p); p += 4;
rec->r.sdir.keyid[1]= buftou32(p); p += 4;
rec->r.sdir.pubkey_algo = *p++;
p += 3;
rec->r.sdir.hintlist = buftoulong(p);
if( rec->r.sdir.lid != recnum ) {
1998-10-21 17:34:36 +00:00
log_error( "%s: sdir LID != recnum (%lu,%lu)\n",
db_name, rec->r.sdir.lid, (ulong)recnum );
1998-10-12 20:16:38 +00:00
rc = G10ERR_TRUSTDB;
}
break;
1998-10-18 15:21:22 +00:00
case RECTYPE_CACH: /* cache record */
1998-07-14 17:10:28 +00:00
rec->r.cache.lid = buftoulong(p); p += 4;
memcpy(rec->r.cache.blockhash, p, 20); p += 20;
rec->r.cache.trustlevel = *p++;
break;
1998-07-29 19:35:05 +00:00
case RECTYPE_HTBL:
for(i=0; i < ITEMS_PER_HTBL_RECORD; i++ ) {
rec->r.htbl.item[i] = buftoulong(p); p += 4;
}
break;
case RECTYPE_HLST:
rec->r.hlst.next = buftoulong(p); p += 4;
for(i=0; i < ITEMS_PER_HLST_RECORD; i++ ) {
rec->r.hlst.rnum[i] = buftoulong(p); p += 4;
}
break;
1998-07-09 13:37:17 +00:00
default:
1998-10-21 17:34:36 +00:00
log_error( "%s: invalid record type %d at recnum %lu\n",
db_name, rec->rectype, (ulong)recnum );
1998-07-09 13:37:17 +00:00
rc = G10ERR_TRUSTDB;
break;
}
return rc;
}
/****************
* Write the record at RECNUM
*/
int
1998-07-15 18:05:01 +00:00
tdbio_write_record( TRUSTREC *rec )
1998-07-09 13:37:17 +00:00
{
byte buf[TRUST_RECORD_LEN], *p;
int rc = 0;
1998-10-16 16:00:17 +00:00
int i;
1998-07-15 18:05:01 +00:00
ulong recnum = rec->recnum;
1998-07-09 13:37:17 +00:00
if( db_fd == -1 )
open_db();
memset(buf, 0, TRUST_RECORD_LEN);
p = buf;
*p++ = rec->rectype; p++;
switch( rec->rectype ) {
case 0: /* unused record */
break;
1998-07-29 19:35:05 +00:00
case RECTYPE_VER: /* version record */
if( recnum )
BUG();
memcpy(p-1, "gpg", 3 ); p += 2;
*p++ = rec->r.ver.version;
*p++ = rec->r.ver.marginals;
*p++ = rec->r.ver.completes;
*p++ = rec->r.ver.cert_depth;
p += 4; /* skip lock flags */
1998-07-29 19:35:05 +00:00
ulongtobuf(p, rec->r.ver.created); p += 4;
ulongtobuf(p, rec->r.ver.mod_down); p += 4;
ulongtobuf(p, rec->r.ver.mod_up); p += 4;
1998-07-29 19:35:05 +00:00
ulongtobuf(p, rec->r.ver.keyhashtbl); p += 4;
1998-10-07 13:30:43 +00:00
ulongtobuf(p, rec->r.ver.firstfree ); p += 4;
1998-10-12 20:16:38 +00:00
ulongtobuf(p, rec->r.ver.sdirhashtbl ); p += 4;
1998-10-07 13:30:43 +00:00
break;
case RECTYPE_FREE:
ulongtobuf(p, rec->r.free.next); p += 4;
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_DIR: /*directory record */
1998-07-14 17:10:28 +00:00
ulongtobuf(p, rec->r.dir.lid); p += 4;
ulongtobuf(p, rec->r.dir.keylist); p += 4;
ulongtobuf(p, rec->r.dir.uidlist); p += 4;
ulongtobuf(p, rec->r.dir.cacherec); p += 4;
*p++ = rec->r.dir.ownertrust;
1998-07-21 12:53:38 +00:00
*p++ = rec->r.dir.dirflags;
*p++ = rec->r.dir.validity;
ulongtobuf(p, rec->r.dir.valcheck); p += 4;
ulongtobuf(p, rec->r.dir.checkat); p += 4;
1998-07-14 17:10:28 +00:00
assert( rec->r.dir.lid == recnum );
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_KEY:
1998-07-14 17:10:28 +00:00
ulongtobuf(p, rec->r.key.lid); p += 4;
ulongtobuf(p, rec->r.key.next); p += 4;
1998-07-21 12:53:38 +00:00
p += 7;
*p++ = rec->r.key.keyflags;
1998-07-09 13:37:17 +00:00
*p++ = rec->r.key.pubkey_algo;
*p++ = rec->r.key.fingerprint_len;
memcpy( p, rec->r.key.fingerprint, 20); p += 20;
break;
1998-07-14 17:10:28 +00:00
case RECTYPE_UID: /* user id record */
ulongtobuf(p, rec->r.uid.lid); p += 4;
ulongtobuf(p, rec->r.uid.next); p += 4;
ulongtobuf(p, rec->r.uid.prefrec); p += 4;
ulongtobuf(p, rec->r.uid.siglist); p += 4;
1998-07-21 12:53:38 +00:00
*p++ = rec->r.uid.uidflags;
*p++ = rec->r.uid.validity;
1998-07-14 17:10:28 +00:00
memcpy( p, rec->r.uid.namehash, 20 ); p += 20;
break;
case RECTYPE_PREF:
ulongtobuf(p, rec->r.pref.lid); p += 4;
ulongtobuf(p, rec->r.pref.next); p += 4;
1998-08-05 16:51:59 +00:00
memcpy( p, rec->r.pref.data, 30 );
1998-07-09 13:37:17 +00:00
break;
case RECTYPE_SIG:
1998-07-14 17:10:28 +00:00
ulongtobuf(p, rec->r.sig.lid); p += 4;
ulongtobuf(p, rec->r.sig.next); p += 4;
1998-07-09 13:37:17 +00:00
for(i=0; i < SIGS_PER_RECORD; i++ ) {
1998-07-14 17:10:28 +00:00
ulongtobuf(p, rec->r.sig.sig[i].lid); p += 4;
1998-07-09 13:37:17 +00:00
*p++ = rec->r.sig.sig[i].flag;
}
break;
1998-07-14 17:10:28 +00:00
1998-10-12 20:16:38 +00:00
case RECTYPE_SDIR:
ulongtobuf( p, rec->r.sdir.lid); p += 4;
u32tobuf( p, rec->r.sdir.keyid[0] ); p += 4;
u32tobuf( p, rec->r.sdir.keyid[1] ); p += 4;
*p++ = rec->r.sdir.pubkey_algo;
p += 3;
ulongtobuf( p, rec->r.sdir.hintlist );
break;
1998-10-18 15:21:22 +00:00
case RECTYPE_CACH:
1998-07-14 17:10:28 +00:00
ulongtobuf(p, rec->r.cache.lid); p += 4;
memcpy(p, rec->r.cache.blockhash, 20); p += 20;
*p++ = rec->r.cache.trustlevel;
break;
1998-07-29 19:35:05 +00:00
case RECTYPE_HTBL:
for(i=0; i < ITEMS_PER_HTBL_RECORD; i++ ) {
ulongtobuf( p, rec->r.htbl.item[i]); p += 4;
}
break;
case RECTYPE_HLST:
ulongtobuf( p, rec->r.hlst.next); p += 4;
for(i=0; i < ITEMS_PER_HLST_RECORD; i++ ) {
ulongtobuf( p, rec->r.hlst.rnum[i]); p += 4;
}
break;
1998-07-09 13:37:17 +00:00
default:
BUG();
}
1998-10-16 16:00:17 +00:00
rc = put_record_into_cache( recnum, buf );
if( rc )
;
else if( rec->rectype == RECTYPE_KEY )
1998-07-29 19:35:05 +00:00
rc = update_keyhashtbl( rec );
1998-10-12 20:16:38 +00:00
else if( rec->rectype == RECTYPE_SDIR )
rc = update_sdirhashtbl( rec );
1998-07-09 13:37:17 +00:00
return rc;
}
1998-07-21 12:53:38 +00:00
int
tdbio_delete_record( ulong recnum )
{
1998-10-07 13:30:43 +00:00
TRUSTREC vr, rec;
int rc;
/* Must read the record fist, so we can drop it from the hash tables */
rc = tdbio_read_record( recnum, &rec, 0 );
if( rc )
;
else if( rec.rectype == RECTYPE_KEY )
rc = drop_from_keyhashtbl( &rec );
else if( rec.rectype == RECTYPE_SDIR )
rc = drop_from_sdirhashtbl( &rec );
if( rc )
return rc;
/* now we can chnage it to a free record */
1998-10-07 13:30:43 +00:00
rc = tdbio_read_record( 0, &vr, RECTYPE_VER );
if( rc )
1998-10-21 17:34:36 +00:00
log_fatal( _("%s: error reading version record: %s\n"),
db_name, g10_errstr(rc) );
1998-07-21 12:53:38 +00:00
rec.recnum = recnum;
1998-10-07 13:30:43 +00:00
rec.rectype = RECTYPE_FREE;
rec.r.free.next = vr.r.ver.firstfree;
vr.r.ver.firstfree = recnum;
rc = tdbio_write_record( &rec );
if( !rc )
rc = tdbio_write_record( &vr );
return rc;
1998-07-21 12:53:38 +00:00
}
1998-07-09 13:37:17 +00:00
/****************
* create a new record and return its record number
*/
ulong
tdbio_new_recnum()
{
off_t offset;
ulong recnum;
1998-10-07 13:30:43 +00:00
TRUSTREC vr, rec;
1998-07-09 13:37:17 +00:00
int rc;
1998-10-07 13:30:43 +00:00
/* look for unused records */
rc = tdbio_read_record( 0, &vr, RECTYPE_VER );
1998-07-09 13:37:17 +00:00
if( rc )
1998-10-21 17:34:36 +00:00
log_fatal( _("%s: error reading version record: %s\n"),
db_name, g10_errstr(rc) );
1998-10-07 13:30:43 +00:00
if( vr.r.ver.firstfree ) {
recnum = vr.r.ver.firstfree;
rc = tdbio_read_record( recnum, &rec, RECTYPE_FREE );
if( rc ) {
1998-10-21 17:34:36 +00:00
log_error( _("%s: error reading free record: %s\n"),
db_name, g10_errstr(rc) );
1998-10-07 13:30:43 +00:00
return rc;
}
/* update dir record */
vr.r.ver.firstfree = rec.r.free.next;
rc = tdbio_write_record( &vr );
if( rc ) {
1998-10-21 17:34:36 +00:00
log_error( _("%s: error writing dir record: %s\n"),
db_name, g10_errstr(rc) );
1998-10-07 13:30:43 +00:00
return rc;
}
/*zero out the new record */
memset( &rec, 0, sizeof rec );
rec.rectype = 0; /* unused record */
rec.recnum = recnum;
rc = tdbio_write_record( &rec );
if( rc )
1998-10-21 17:34:36 +00:00
log_fatal(_("%s: failed to zero a record: %s\n"),
db_name, g10_errstr(rc));
1998-10-07 13:30:43 +00:00
}
else { /* not found, append a new record */
offset = lseek( db_fd, 0, SEEK_END );
if( offset == -1 )
log_fatal("trustdb: lseek to end failed: %s\n", strerror(errno) );
recnum = offset / TRUST_RECORD_LEN;
assert(recnum); /* this is will never be the first record */
/* we must write a record, so that the next call to this function
* returns another recnum */
memset( &rec, 0, sizeof rec );
rec.rectype = 0; /* unused record */
rec.recnum = recnum;
1998-10-16 16:00:17 +00:00
rc = 0;
if( lseek( db_fd, recnum * TRUST_RECORD_LEN, SEEK_SET ) == -1 ) {
log_error(_("trustdb rec %lu: lseek failed: %s\n"),
recnum, strerror(errno) );
rc = G10ERR_WRITE_FILE;
}
else {
int n = write( db_fd, &rec, TRUST_RECORD_LEN);
if( n != TRUST_RECORD_LEN ) {
log_error(_("trustdb rec %lu: write failed (n=%d): %s\n"),
recnum, n, strerror(errno) );
rc = G10ERR_WRITE_FILE;
}
}
1998-10-07 13:30:43 +00:00
if( rc )
1998-10-21 17:34:36 +00:00
log_fatal(_("%s: failed to append a record: %s\n"),
db_name, g10_errstr(rc));
1998-10-07 13:30:43 +00:00
}
1998-07-09 13:37:17 +00:00
return recnum ;
}
/****************
* Search the trustdb for a key which matches PK and return the dir record
* The local_id of PK is set to the correct value
*/
int
1998-07-30 17:37:03 +00:00
tdbio_search_dir_bypk( PKT_public_key *pk, TRUSTREC *rec )
1998-07-09 13:37:17 +00:00
{
1998-10-12 20:16:38 +00:00
byte fingerprint[MAX_FINGERPRINT_LEN];
1998-07-09 13:37:17 +00:00
size_t fingerlen;
1998-07-30 17:37:03 +00:00
u32 keyid[2];
int rc;
keyid_from_pk( pk, keyid );
1998-10-12 20:16:38 +00:00
fingerprint_from_pk( pk, fingerprint, &fingerlen );
1998-07-30 17:37:03 +00:00
rc = tdbio_search_dir_byfpr( fingerprint, fingerlen,
pk->pubkey_algo, rec );
if( !rc ) {
if( pk->local_id && pk->local_id != rec->recnum )
1998-10-21 17:34:36 +00:00
log_error("%s: found record, but LID from memory does "
1998-07-30 17:37:03 +00:00
"not match recnum (%lu,%lu)\n",
1998-10-21 17:34:36 +00:00
db_name, pk->local_id, rec->recnum );
1998-07-30 17:37:03 +00:00
pk->local_id = rec->recnum;
}
return rc;
}
1998-10-12 20:16:38 +00:00
static int
cmp_krec_fpr( void *dataptr, const TRUSTREC *rec )
{
const struct cmp_krec_fpr_struct *d = dataptr;
return rec->rectype == RECTYPE_KEY
&& ( !d->pubkey_algo || rec->r.key.pubkey_algo == d->pubkey_algo )
&& rec->r.key.fingerprint_len == d->fprlen
&& !memcmp( rec->r.key.fingerprint, d->fpr, d->fprlen );
}
1998-07-30 17:37:03 +00:00
int
tdbio_search_dir_byfpr( const byte *fingerprint, size_t fingerlen,
int pubkey_algo, TRUSTREC *rec )
{
1998-10-12 20:16:38 +00:00
struct cmp_krec_fpr_struct cmpdata;
1998-07-30 17:37:03 +00:00
ulong recnum;
1998-07-09 13:37:17 +00:00
int rc;
assert( fingerlen == 20 || fingerlen == 16 );
1998-07-29 19:35:05 +00:00
/* locate the key using the hash table */
1998-10-12 20:16:38 +00:00
cmpdata.pubkey_algo = pubkey_algo;
cmpdata.fpr = fingerprint;
cmpdata.fprlen = fingerlen;
rc = lookup_hashtable( get_keyhashrec(), fingerprint, fingerlen,
cmp_krec_fpr, &cmpdata, rec );
if( !rc ) {
recnum = rec->r.key.lid;
/* Now read the dir record */
rc = tdbio_read_record( recnum, rec, RECTYPE_DIR);
if( rc )
1998-10-21 17:34:36 +00:00
log_error("%s: can't read dirrec %lu: %s\n",
db_name, recnum, g10_errstr(rc) );
1998-07-29 19:35:05 +00:00
}
1998-07-09 13:37:17 +00:00
return rc;
}
1998-10-12 20:16:38 +00:00
1998-08-07 08:53:38 +00:00
static int
1998-10-12 20:16:38 +00:00
cmp_sdir( void *dataptr, const TRUSTREC *rec )
1998-08-07 08:53:38 +00:00
{
const struct cmp_xdir_struct *d = dataptr;
1998-08-07 08:53:38 +00:00
1998-10-12 20:16:38 +00:00
return rec->rectype == RECTYPE_SDIR
&& ( !d->pubkey_algo || rec->r.sdir.pubkey_algo == d->pubkey_algo )
&& rec->r.sdir.keyid[0] == d->keyid[0]
&& rec->r.sdir.keyid[1] == d->keyid[1];
1998-08-07 08:53:38 +00:00
}
1998-07-09 13:37:17 +00:00
1998-10-12 20:16:38 +00:00
1998-07-14 17:10:28 +00:00
int
1998-10-12 20:16:38 +00:00
tdbio_search_sdir( u32 *keyid, int pubkey_algo, TRUSTREC *rec )
1998-07-14 17:10:28 +00:00
{
struct cmp_xdir_struct cmpdata;
1998-08-07 08:53:38 +00:00
int rc;
1998-10-12 20:16:38 +00:00
byte key[8];
/* locate the shadow dir record using the hash table */
u32tobuf( key , keyid[0] );
u32tobuf( key+4 , keyid[1] );
cmpdata.pubkey_algo = pubkey_algo;
cmpdata.keyid[0] = keyid[0];
cmpdata.keyid[1] = keyid[1];
rc = lookup_hashtable( get_sdirhashrec(), key, 8,
cmp_sdir, &cmpdata, rec );
return rc;
1998-07-14 17:10:28 +00:00
}
1998-07-21 12:53:38 +00:00
void
tdbio_invalid(void)
{
log_error(_(
"the trustdb is corrupted; please run \"gpg --fix-trustdb\".\n") );
g10_exit(2);
}