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d4cd7a3d4b
gnupg/g10/keyring.c
Werner Koch d4cd7a3d4b more bug fixesand some warning cleanups
2001-09-09 16:09:19 +00:00

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/* keyring.c - keyring file handling
* Copyright (C) 2001 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
*/
#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 "util.h"
#include "keyring.h"
#include "packet.h"
#include "keydb.h"
#include "options.h"
#include "i18n.h"
typedef struct keyring_name *KR_NAME;
struct keyring_name {
struct keyring_name *next;
int secret;
DOTLOCK lockhd;
int is_locked;
char fname[1];
};
typedef struct keyring_name const * CONST_KR_NAME;
static KR_NAME kr_names;
static int active_handles;
struct keyring_handle {
int secret; /* this is for a secret keyring */
struct {
CONST_KR_NAME kr;
IOBUF iobuf;
int eof;
int error;
} current;
struct {
CONST_KR_NAME kr;
off_t offset;
size_t pk_no;
size_t uid_no;
unsigned int n_packets; /*used for delete and update*/
} found;
struct {
char *name;
char *pattern;
} word_match;
};
static int do_copy (int mode, const char *fname, KBNODE root, int secret,
off_t start_offset, unsigned int n_packets );
/*
* Register a filename for plain keyring files
*/
void
keyring_register_filename (const char *fname, int secret)
{
KR_NAME kr;
if (active_handles)
BUG (); /* We don't allow that */
for (kr=kr_names; kr; kr = kr->next) {
if ( !compare_filenames (kr->fname, fname) )
return; /* already registered */
}
kr = m_alloc (sizeof *kr + strlen (fname));
strcpy (kr->fname, fname);
kr->secret = !!secret;
kr->lockhd = NULL;
kr->is_locked = 0;
kr->next = kr_names;
kr_names = kr;
}
KEYRING_HANDLE
keyring_new (int secret)
{
KEYRING_HANDLE hd;
hd = m_alloc_clear (sizeof *hd);
hd->secret = !!secret;
active_handles++;
return hd;
}
void
keyring_release (KEYRING_HANDLE hd)
{
if (!hd)
return;
assert (active_handles > 0);
active_handles--;
m_free (hd->word_match.name);
m_free (hd->word_match.pattern);
m_free (hd);
}
static CONST_KR_NAME
next_kr (CONST_KR_NAME start, int secret)
{
start = start? start->next : kr_names;
while ( start && start->secret != secret )
start = start->next;
return start;
}
const char *
keyring_get_resource_name (KEYRING_HANDLE hd)
{
const char *fname;
if (!hd)
fname = NULL;
else if (hd->found.kr)
fname = hd->found.kr->fname;
else if (hd->current.kr)
fname = hd->current.kr->fname;
else {
CONST_KR_NAME kr = next_kr (NULL, hd->secret);
fname = kr? kr->fname:NULL;
}
return fname;
}
/*
* Lock the keyring with the given handle, or unlok if yes is false.
* We ignore the handle and lock all registered files.
*/
int
keyring_lock (KEYRING_HANDLE hd, int yes)
{
KR_NAME kr;
int rc = 0;
if (yes) {
/* first make sure the lock handles are created */
for (kr=kr_names; kr; kr = kr->next) {
if (!kr->lockhd) {
kr->lockhd = create_dotlock( kr->fname );
if (!kr->lockhd) {
log_info ("can't allocate lock for `%s'\n", kr->fname );
rc = G10ERR_GENERAL;
}
}
}
if (rc)
return rc;
/* and now set the locks */
for (kr=kr_names; kr; kr = kr->next) {
if (kr->is_locked)
;
else if (make_dotlock (kr->lockhd, -1) ) {
log_info ("can't lock `%s'\n", kr->fname );
rc = G10ERR_GENERAL;
}
else
kr->is_locked = 1;
}
}
if (rc || !yes) {
for (kr=kr_names; kr; kr = kr->next) {
if (!kr->is_locked)
;
else if (release_dotlock (kr->lockhd))
log_info ("can't unlock `%s'\n", kr->fname );
else
kr->is_locked = 0;
}
}
return rc;
}
/*
* Return the last found keyring. Caller must free it.
* The returned keyblock has the kbode flag bit 0 set for the node with
* the public key used to locate the keyblock or flag bit 1 set for
* the user ID node.
*/
int
keyring_get_keyblock (KEYRING_HANDLE hd, KBNODE *ret_kb)
{
PACKET *pkt;
int rc;
KBNODE keyblock = NULL, node;
IOBUF a;
int in_cert = 0;
int pk_no = 0;
int uid_no = 0;
if (!hd->found.kr)
return -1; /* no successful search */
a = iobuf_open (hd->found.kr->fname);
if (!a) {
log_error ("can't open `%s'\n", hd->found.kr->fname);
return G10ERR_KEYRING_OPEN;
}
if (iobuf_seek (a, hd->found.offset) ) {
log_error ("can't seek `%s'\n", hd->found.kr->fname);
iobuf_close(a);
return G10ERR_KEYRING_OPEN;
}
pkt = m_alloc (sizeof *pkt);
init_packet (pkt);
hd->found.n_packets = 0;;
while ((rc=parse_packet (a, pkt)) != -1) {
hd->found.n_packets++;
if (rc == G10ERR_UNKNOWN_PACKET) {
free_packet (pkt);
init_packet (pkt);
continue;
}
if (rc) {
log_error ("keyring_get_keyblock: read error: %s\n",
g10_errstr(rc) );
rc = G10ERR_INV_KEYRING;
break;
}
if (pkt->pkttype == PKT_COMPRESSED) {
log_error ("skipped compressed packet in keyring\n");
free_packet(pkt);
init_packet(pkt);
continue;
}
if (in_cert && (pkt->pkttype == PKT_PUBLIC_KEY
|| pkt->pkttype == PKT_SECRET_KEY)) {
hd->found.n_packets--; /* fix counter */
break; /* ready */
}
in_cert = 1;
node = new_kbnode (pkt);
if (!keyblock)
keyblock = node;
else
add_kbnode (keyblock, node);
if ( pkt->pkttype == PKT_PUBLIC_KEY
|| pkt->pkttype == PKT_PUBLIC_SUBKEY
|| pkt->pkttype == PKT_SECRET_KEY
|| pkt->pkttype == PKT_SECRET_SUBKEY) {
if (++pk_no == hd->found.pk_no)
node->flag |= 1;
}
else if ( pkt->pkttype == PKT_USER_ID) {
if (++uid_no == hd->found.uid_no)
node->flag |= 2;
}
pkt = m_alloc (sizeof *pkt);
init_packet(pkt);
}
if (rc == -1 && keyblock)
rc = 0; /* got the entire keyblock */
if (rc || !ret_kb)
release_kbnode (keyblock);
else
*ret_kb = keyblock;
free_packet (pkt);
m_free (pkt);
iobuf_close(a);
return rc;
}
int
keyring_update_keyblock (KEYRING_HANDLE hd, KBNODE kb)
{
int rc;
if (!hd->found.kr)
return -1; /* no successful prior search */
if (!hd->found.n_packets) {
/* need to know the number of packets - do a dummy get_keyblock*/
rc = keyring_get_keyblock (hd, NULL);
if (rc) {
log_error ("re-reading keyblock failed: %s\n", g10_errstr (rc));
return rc;
}
if (!hd->found.n_packets)
BUG ();
}
/* do the update */
rc = do_copy (3, hd->found.kr->fname, kb, hd->secret,
hd->found.offset, hd->found.n_packets );
if (!rc) {
/* better reset the found info */
hd->found.kr = NULL;
hd->found.offset = 0;
}
return rc;
}
int
keyring_insert_keyblock (KEYRING_HANDLE hd, KBNODE kb)
{
int rc;
const char *fname;
if (!hd)
fname = NULL;
else if (hd->found.kr)
fname = hd->found.kr->fname;
else if (hd->current.kr)
fname = hd->current.kr->fname;
else {
CONST_KR_NAME kr = next_kr (NULL, hd->secret);
fname = kr? kr->fname:NULL;
}
if (!fname)
return G10ERR_GENERAL;
/* do the insert */
rc = do_copy (1, fname, kb, hd->secret, 0, 0 );
return rc;
}
int
keyring_delete_keyblock (KEYRING_HANDLE hd)
{
int rc;
if (!hd->found.kr)
return -1; /* no successful prior search */
if (!hd->found.n_packets) {
/* need to know the number of packets - do a dummy get_keyblock*/
rc = keyring_get_keyblock (hd, NULL);
if (rc) {
log_error ("re-reading keyblock failed: %s\n", g10_errstr (rc));
return rc;
}
if (!hd->found.n_packets)
BUG ();
}
/* do the delete */
rc = do_copy (2, hd->found.kr->fname, NULL, hd->secret,
hd->found.offset, hd->found.n_packets );
if (!rc) {
/* better reset the found info */
hd->found.kr = NULL;
hd->found.offset = 0;
}
return rc;
}
/*
* Start the next search on this handle right at the beginning
*/
int
keyring_search_reset (KEYRING_HANDLE hd)
{
assert (hd);
hd->current.kr = NULL;
iobuf_close (hd->current.iobuf);
hd->current.iobuf = NULL;
hd->current.eof = 0;
hd->current.error = 0;
hd->found.kr = NULL;
hd->found.offset = 0;
return 0;
}
static int
prepare_search (KEYRING_HANDLE hd)
{
if (hd->current.error)
return hd->current.error; /* still in error state */
if (hd->current.kr && !hd->current.eof) {
assert ( hd->current.iobuf);
return 0; /* okay */
}
if (!hd->current.kr && hd->current.eof)
return -1; /* still EOF */
if (!hd->current.kr) { /* start search with first keyring */
hd->current.kr = next_kr (NULL, hd->secret);
if (!hd->current.kr) {
hd->current.eof = 1;
return -1; /* no keyring available */
}
assert (!hd->current.iobuf);
}
else { /* EOF on last keyring - switch to next one */
iobuf_close (hd->current.iobuf);
hd->current.iobuf = NULL;
hd->current.kr = next_kr (hd->current.kr, hd->secret);
if (!hd->current.kr) {
hd->current.eof = 1;
return -1;
}
}
hd->current.eof = 0;
hd->current.iobuf = iobuf_open (hd->current.kr->fname);
if (!hd->current.iobuf) {
log_error ("can't open `%s'\n", hd->current.kr->fname );
return (hd->current.error = G10ERR_OPEN_FILE);
}
return 0;
}
/* A map of the all characters valid used for word_match()
* Valid characters are in in this table converted to uppercase.
* because the upper 128 bytes have special meaning, we assume
* that they are all valid.
* Note: We must use numerical values here in case that this program
* will be converted to those little blue HAL9000s with their strange
* EBCDIC character set (user ids are UTF-8).
* wk 2000-04-13: Hmmm, does this really make sense, given the fact that
* we can run gpg now on a S/390 running GNU/Linux, where the code
* translation is done by the device drivers?
*/
static const byte word_match_chars[256] = {
/* 00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 18 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
/* 38 */ 0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 40 */ 0x00, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
/* 48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
/* 50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
/* 58 */ 0x58, 0x59, 0x5a, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 60 */ 0x00, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
/* 68 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
/* 70 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
/* 78 */ 0x58, 0x59, 0x5a, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
/* 88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
/* 90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
/* 98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
/* a0 */ 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
/* a8 */ 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
/* b0 */ 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* b8 */ 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
/* c0 */ 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
/* c8 */ 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
/* d0 */ 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
/* d8 */ 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
/* e0 */ 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
/* e8 */ 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
/* f0 */ 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
/* f8 */ 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
};
/****************
* Do a word match (original user id starts with a '+').
* The pattern is already tokenized to a more suitable format:
* There are only the real words in it delimited by one space
* and all converted to uppercase.
*
* Returns: 0 if all words match.
*
* Note: This algorithm is a straightforward one and not very
* fast. It works for UTF-8 strings. The uidlen should
* be removed but due to the fact that old versions of
* pgp don't use UTF-8 we still use the length; this should
* be fixed in parse-packet (and replace \0 by some special
* UTF-8 encoding)
*/
static int
word_match( const byte *uid, size_t uidlen, const byte *pattern )
{
size_t wlen, n;
const byte *p;
const byte *s;
for( s=pattern; *s; ) {
do {
/* skip leading delimiters */
while( uidlen && !word_match_chars[*uid] )
uid++, uidlen--;
/* get length of the word */
n = uidlen; p = uid;
while( n && word_match_chars[*p] )
p++, n--;
wlen = p - uid;
/* and compare against the current word from pattern */
for(n=0, p=uid; n < wlen && s[n] != ' ' && s[n] ; n++, p++ ) {
if( word_match_chars[*p] != s[n] )
break;
}
if( n == wlen && (s[n] == ' ' || !s[n]) )
break; /* found */
uid += wlen;
uidlen -= wlen;
} while( uidlen );
if( !uidlen )
return -1; /* not found */
/* advance to next word in pattern */
for(; *s != ' ' && *s ; s++ )
;
if( *s )
s++ ;
}
return 0; /* found */
}
/****************
* prepare word word_match; that is parse the name and
* build the pattern.
* caller has to free the returned pattern
*/
static char*
prepare_word_match (const byte *name)
{
byte *pattern, *p;
int c;
/* the original length is always enough for the pattern */
p = pattern = m_alloc(strlen(name)+1);
do {
/* skip leading delimiters */
while( *name && !word_match_chars[*name] )
name++;
/* copy as long as we don't have a delimiter and convert
* to uppercase.
* fixme: how can we handle utf8 uppercasing */
for( ; *name && (c=word_match_chars[*name]); name++ )
*p++ = c;
*p++ = ' '; /* append pattern delimiter */
} while( *name );
p[-1] = 0; /* replace last pattern delimiter by EOS */
return pattern;
}
static int
compare_name (int mode, const char *name, const char *uid, size_t uidlen)
{
int i;
const char *s, *se;
if (mode == KEYDB_SEARCH_MODE_EXACT) {
for (i=0; name[i] && uidlen; i++, uidlen--)
if (uid[i] != name[i])
break;
if (!uidlen && !name[i])
return 0; /* found */
}
else if (mode == KEYDB_SEARCH_MODE_SUBSTR) {
if (ascii_memistr( uid, uidlen, name ))
return 0;
}
else if ( mode == KEYDB_SEARCH_MODE_MAIL
|| mode == KEYDB_SEARCH_MODE_MAILSUB
|| mode == KEYDB_SEARCH_MODE_MAILEND) {
for (i=0, s= uid; i < uidlen && *s != '<'; s++, i++)
;
if (i < uidlen) {
/* skip opening delim and one char and look for the closing one*/
s++; i++;
for (se=s+1, i++; i < uidlen && *se != '>'; se++, i++)
;
if (i < uidlen) {
i = se - s;
if (mode == KEYDB_SEARCH_MODE_MAIL) {
if( strlen(name)-2 == i
&& !ascii_memcasecmp( s, name+1, i) )
return 0;
}
else if (mode == KEYDB_SEARCH_MODE_MAILSUB) {
if( ascii_memistr( s, i, name ) )
return 0;
}
else { /* email from end */
/* nyi */
}
}
}
}
else if (mode == KEYDB_SEARCH_MODE_WORDS)
return word_match (uid, uidlen, name);
else
BUG();
return -1; /* not found */
}
/*
* Search through the keyring(s), starting at the current position,
* for a keyblock which contains one of the keys described in the DESC array.
*/
int
keyring_search (KEYRING_HANDLE hd, KEYDB_SEARCH_DESC *desc, size_t ndesc)
{
int rc;
PACKET pkt;
int save_mode;
off_t offset, main_offset;
size_t n;
int need_uid, need_words, need_keyid, need_fpr;
int pk_no, uid_no;
int initial_skip;
PKT_user_id *uid = NULL;
PKT_public_key *pk = NULL;
PKT_secret_key *sk = NULL;
/* figure out what information we need */
need_uid = need_words = need_keyid = need_fpr = 0;
for (n=0; n < ndesc; n++) {
switch (desc[n].mode) {
case KEYDB_SEARCH_MODE_EXACT:
case KEYDB_SEARCH_MODE_SUBSTR:
case KEYDB_SEARCH_MODE_MAIL:
case KEYDB_SEARCH_MODE_MAILSUB:
case KEYDB_SEARCH_MODE_MAILEND:
need_uid = 1;
break;
case KEYDB_SEARCH_MODE_WORDS:
need_uid = 1;
need_words = 1;
break;
case KEYDB_SEARCH_MODE_SHORT_KID:
case KEYDB_SEARCH_MODE_LONG_KID:
need_keyid = 1;
break;
case KEYDB_SEARCH_MODE_FPR16:
case KEYDB_SEARCH_MODE_FPR20:
case KEYDB_SEARCH_MODE_FPR:
need_fpr = 1;
break;
case KEYDB_SEARCH_MODE_FIRST:
/* always restart the search in this mode */
keyring_search_reset (hd);
break;
default: break;
}
}
rc = prepare_search (hd);
if (rc)
return rc;
#if 0
if (need_words) {
BUG();
if ( !hd->word_match.name || strcmp (hd->word_match.name, name) ) {
/* name changed */
m_free (hd->word_match.name);
m_free (hd->word_match.pattern);
hd->word_match.name = m_strdup (name);
hd->word_match.pattern = prepare_word_match (name);
}
name = hd->word_match.pattern;
}
#endif
init_packet(&pkt);
save_mode = set_packet_list_mode(0);
hd->found.kr = NULL;
main_offset = 0;
pk_no = uid_no = 0;
initial_skip = 1; /* skip until we see the start of a keyblock */
while (!(rc=search_packet (hd->current.iobuf, &pkt, &offset, need_uid))) {
byte afp[MAX_FINGERPRINT_LEN];
size_t an;
u32 aki[2];
if (pkt.pkttype == PKT_PUBLIC_KEY
|| pkt.pkttype == PKT_SECRET_KEY) {
main_offset = offset;
pk_no = uid_no = 0;
initial_skip = 0;
}
if (initial_skip) {
free_packet (&pkt);
continue;
}
pk = NULL;
sk = NULL;
uid = NULL;
if ( pkt.pkttype == PKT_PUBLIC_KEY
|| pkt.pkttype == PKT_PUBLIC_SUBKEY) {
pk = pkt.pkt.public_key;
++pk_no;
if (need_fpr) {
fingerprint_from_pk (pk, afp, &an);
while (an < 20) /* fill up to 20 bytes */
afp[an++] = 0;
}
if (need_keyid)
keyid_from_pk (pk, aki);
}
else if (pkt.pkttype == PKT_USER_ID) {
uid = pkt.pkt.user_id;
++uid_no;
}
else if ( pkt.pkttype == PKT_SECRET_KEY
|| pkt.pkttype == PKT_SECRET_SUBKEY) {
sk = pkt.pkt.secret_key;
++pk_no;
if (need_fpr) {
fingerprint_from_sk (sk, afp, &an);
while (an < 20) /* fill up to 20 bytes */
afp[an++] = 0;
}
if (need_keyid)
keyid_from_sk (sk, aki);
}
for (n=0; n < ndesc; n++) {
switch (desc[n].mode) {
case KEYDB_SEARCH_MODE_NONE:
BUG ();
break;
case KEYDB_SEARCH_MODE_TDBIDX:
BUG();
break;
case KEYDB_SEARCH_MODE_EXACT:
case KEYDB_SEARCH_MODE_SUBSTR:
case KEYDB_SEARCH_MODE_MAIL:
case KEYDB_SEARCH_MODE_MAILSUB:
case KEYDB_SEARCH_MODE_MAILEND:
case KEYDB_SEARCH_MODE_WORDS:
if ( uid && !compare_name (desc[n].mode,
desc[n].u.name,
uid->name, uid->len))
goto found;
break;
case KEYDB_SEARCH_MODE_SHORT_KID:
if ((pk||sk) && desc[n].u.kid[1] == aki[1])
goto found;
break;
case KEYDB_SEARCH_MODE_LONG_KID:
if ((pk||sk) && desc[n].u.kid[0] == aki[0]
&& desc[n].u.kid[1] == aki[1])
goto found;
break;
case KEYDB_SEARCH_MODE_FPR16:
if ((pk||sk) && !memcmp (desc[n].u.fpr, afp, 16))
goto found;
break;
case KEYDB_SEARCH_MODE_FPR20:
case KEYDB_SEARCH_MODE_FPR:
if ((pk||sk) && !memcmp (desc[n].u.fpr, afp, 20))
goto found;
break;
case KEYDB_SEARCH_MODE_FIRST:
case KEYDB_SEARCH_MODE_NEXT:
if (pk||sk)
goto found;
break;
default:
rc = G10ERR_INV_ARG;
goto found;
}
}
free_packet (&pkt);
}
found:
if( !rc ) {
hd->found.offset = main_offset;
hd->found.kr = hd->current.kr;
hd->found.pk_no = (pk||sk)? pk_no : 0;
hd->found.uid_no = uid? uid_no : 0;
}
else if (rc == -1)
hd->current.eof = 1;
else
hd->current.error = rc;
free_packet(&pkt);
set_packet_list_mode(save_mode);
return rc;
}
/****************
* Perform insert/delete/update operation.
* mode 1 = insert
* 2 = delete
* 3 = update
*/
static int
do_copy (int mode, const char *fname, KBNODE root, int secret,
off_t start_offset, unsigned int n_packets )
{
IOBUF fp, newfp;
int rc=0;
char *bakfname = NULL;
char *tmpfname = NULL;
/* open the source file */
fp = iobuf_open (fname);
if (mode == 1 && !fp && errno == ENOENT) {
/* insert mode but file does not exist: create a new file */
KBNODE kbctx, node;
newfp = iobuf_create (fname);
if( !newfp ) {
log_error (_("%s: can't create: %s\n"),
fname, strerror(errno));
return G10ERR_OPEN_FILE;
}
if( !opt.quiet )
log_info(_("%s: keyring created\n"), fname );
kbctx=NULL;
while ( (node = walk_kbnode( root, &kbctx, 0 )) ) {
if( (rc = build_packet( newfp, node->pkt )) ) {
log_error("build_packet(%d) failed: %s\n",
node->pkt->pkttype, g10_errstr(rc) );
iobuf_cancel(newfp);
return G10ERR_WRITE_FILE;
}
}
if( iobuf_close(newfp) ) {
log_error ("%s: close failed: %s\n", fname, strerror(errno));
return G10ERR_CLOSE_FILE;
}
if (chmod( fname, S_IRUSR | S_IWUSR )) {
log_error("%s: chmod failed: %s\n", fname, strerror(errno) );
return G10ERR_WRITE_FILE;
}
return 0; /* ready */
}
if( !fp ) {
log_error ("%s: can't open: %s\n", fname, strerror(errno) );
rc = G10ERR_OPEN_FILE;
goto leave;
}
/* create the new file */
#ifdef USE_ONLY_8DOT3
/* Here is another Windoze bug?:
* you cant rename("pubring.gpg.tmp", "pubring.gpg");
* but rename("pubring.gpg.tmp", "pubring.aaa");
* works. So we replace .gpg by .bak or .tmp
*/
if( strlen (fname) > 4
&& !strcmp (fname+strlen(fname)-4, EXTSEP_S "gpg") ) {
bakfname = m_alloc( strlen (fname) + 1 );
strcpy(bakfname, fname);
strcpy(bakfname+strlen(fname)-4, EXTSEP_S "bak");
tmpfname = m_alloc( strlen( fname ) + 1 );
strcpy(tmpfname,fname);
strcpy(tmpfname+strlen(fname)-4, EXTSEP_S "tmp");
}
else { /* file does not end with gpg; hmmm */
bakfname = m_alloc( strlen( fname ) + 5 );
strcpy(stpcpy(bakfname, fname), EXTSEP_S "bak");
tmpfname = m_alloc( strlen( fname ) + 5 );
strcpy(stpcpy(tmpfname, fname), EXTSEP_S "tmp");
}
#else
bakfname = m_alloc( strlen( fname ) + 2 );
strcpy(stpcpy(bakfname,fname),"~");
tmpfname = m_alloc( strlen( fname ) + 5 );
strcpy(stpcpy(tmpfname,fname), EXTSEP_S "tmp");
#endif
newfp = iobuf_create (tmpfname);
if (!newfp) {
log_error ("%s: can't create: %s\n", tmpfname, strerror(errno) );
iobuf_close(fp);
rc = G10ERR_OPEN_FILE;
goto leave;
}
if( mode == 1 ) { /* insert */
/* copy everything to the new file */
rc = copy_all_packets (fp, newfp);
if( rc != -1 ) {
log_error("%s: copy to `%s' failed: %s\n",
fname, tmpfname, g10_errstr(rc) );
iobuf_close(fp);
iobuf_cancel(newfp);
goto leave;
}
rc = 0;
}
if( mode == 2 || mode == 3 ) { /* delete or update */
/* copy first part to the new file */
rc = copy_some_packets( fp, newfp, start_offset );
if( rc ) { /* should never get EOF here */
log_error ("%s: copy to `%s' failed: %s\n",
fname, tmpfname, g10_errstr(rc) );
iobuf_close(fp);
iobuf_cancel(newfp);
goto leave;
}
/* skip this keyblock */
assert( n_packets );
rc = skip_some_packets( fp, n_packets );
if( rc ) {
log_error("%s: skipping %u packets failed: %s\n",
fname, n_packets, g10_errstr(rc));
iobuf_close(fp);
iobuf_cancel(newfp);
goto leave;
}
}
if( mode == 1 || mode == 3 ) { /* insert or update */
KBNODE kbctx, node;
/* append the new data */
kbctx=NULL;
while( (node = walk_kbnode( root, &kbctx, 0 )) ) {
if( (rc = build_packet( newfp, node->pkt )) ) {
log_error("build_packet(%d) failed: %s\n",
node->pkt->pkttype, g10_errstr(rc) );
iobuf_close(fp);
iobuf_cancel(newfp);
rc = G10ERR_WRITE_FILE;
goto leave;
}
}
}
if( mode == 2 || mode == 3 ) { /* delete or update */
/* copy the rest */
rc = copy_all_packets( fp, newfp );
if( rc != -1 ) {
log_error("%s: copy to `%s' failed: %s\n",
fname, tmpfname, g10_errstr(rc) );
iobuf_close(fp);
iobuf_cancel(newfp);
goto leave;
}
rc = 0;
}
/* close both files */
if( iobuf_close(fp) ) {
log_error("%s: close failed: %s\n", fname, strerror(errno) );
rc = G10ERR_CLOSE_FILE;
goto leave;
}
if( iobuf_close(newfp) ) {
log_error("%s: close failed: %s\n", tmpfname, strerror(errno) );
rc = G10ERR_CLOSE_FILE;
goto leave;
}
/* if the new file is a secring, restrict the permissions */
#ifndef HAVE_DOSISH_SYSTEM
if( secret && !opt.preserve_permissions ) {
if( chmod( tmpfname, S_IRUSR | S_IWUSR ) ) {
log_error("%s: chmod failed: %s\n",
tmpfname, strerror(errno) );
rc = G10ERR_WRITE_FILE;
goto leave;
}
}
#endif
/* rename and make backup file */
if( !secret ) { /* but not for secret keyrings */
iobuf_ioctl (NULL, 2, 0, (char *)bakfname );
iobuf_ioctl (NULL, 2, 0, (char *)fname );
#if defined(HAVE_DOSISH_SYSTEM) || defined(__riscos__)
remove( bakfname );
#endif
if( rename( fname, bakfname ) ) {
log_error("%s: rename to `%s' failed: %s\n",
fname, bakfname, strerror(errno) );
rc = G10ERR_RENAME_FILE;
goto leave;
}
}
iobuf_ioctl (NULL, 2, 0, (char*)tmpfname );
iobuf_ioctl (NULL, 2, 0, (char*)fname );
#if defined(HAVE_DOSISH_SYSTEM) || defined(__riscos__)
remove( fname );
#endif
if( rename( tmpfname, fname ) ) {
log_error("%s: rename to `%s' failed: %s\n",
tmpfname, fname,strerror(errno) );
rc = G10ERR_RENAME_FILE;
if( secret ) {
log_info(_(
"WARNING: 2 files with confidential information exists.\n"));
log_info(_("%s is the unchanged one\n"), fname );
log_info(_("%s is the new one\n"), tmpfname );
log_info(_("Please fix this possible security flaw\n"));
}
goto leave;
}
leave:
m_free(bakfname);
m_free(tmpfname);
return rc;
}
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