mirror of git://git.gnupg.org/gnupg.git
1361 lines
34 KiB
C
1361 lines
34 KiB
C
/* ringedit.c - Function for key ring editing
|
||
* Copyright (C) 1998, 2000 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
|
||
*/
|
||
|
||
|
||
/****************
|
||
* This module supplies function for:
|
||
*
|
||
* - Search for a key block (pubkey and all other stuff) and return a
|
||
* handle for it.
|
||
*
|
||
* - Lock/Unlock a key block
|
||
*
|
||
* - Read a key block into a tree
|
||
*
|
||
* - Update a key block
|
||
*
|
||
* - Insert a new key block
|
||
*
|
||
* - Delete a key block
|
||
*
|
||
*/
|
||
|
||
|
||
|
||
#include <config.h>
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <errno.h>
|
||
#include <sys/types.h>
|
||
#include <sys/stat.h>
|
||
#include <unistd.h> /* for truncate */
|
||
#include <assert.h>
|
||
|
||
#include <gcrypt.h>
|
||
#include "util.h"
|
||
#include "packet.h"
|
||
#include "iobuf.h"
|
||
#include "keydb.h"
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||
#include "host2net.h"
|
||
#include "options.h"
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||
#include "main.h"
|
||
#include "i18n.h"
|
||
#include "kbx.h"
|
||
|
||
|
||
|
||
|
||
struct resource_table_struct {
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||
int used;
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||
int secret; /* this is a secret keyring */
|
||
char *fname;
|
||
IOBUF iobuf;
|
||
enum resource_type rt;
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||
DOTLOCK lockhd;
|
||
int is_locked;
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};
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typedef struct resource_table_struct RESTBL;
|
||
|
||
|
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struct keyblock_pos_struct {
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int resno; /* resource number */
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enum resource_type rt;
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ulong offset; /* position information */
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unsigned count; /* length of the keyblock in packets */
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IOBUF fp; /* used by enum_keyblocks */
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int secret; /* working on a secret keyring */
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PACKET *pkt; /* ditto */
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int valid;
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||
ulong save_offset;
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||
};
|
||
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||
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||
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#define MAX_RESOURCES 10
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static RESTBL resource_table[MAX_RESOURCES];
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static int default_public_resource;
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static int default_secret_resource;
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||
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static int keyring_enum( KBPOS kbpos, KBNODE *ret_root, int skipsigs );
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static int keyring_copy( KBPOS kbpos, int mode, KBNODE root );
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|
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static int do_kbxf_enum( KBPOS kbpos, KBNODE *ret_root, int skipsigs );
|
||
static int do_kbxf_copy( KBPOS kbpos, int mode, KBNODE root );
|
||
|
||
|
||
static RESTBL *
|
||
check_pos( KBPOS kbpos )
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||
{
|
||
if( kbpos->resno < 0 || kbpos->resno >= MAX_RESOURCES )
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return NULL;
|
||
if( !resource_table[kbpos->resno].used )
|
||
return NULL;
|
||
return resource_table + kbpos->resno;
|
||
}
|
||
|
||
|
||
/****************
|
||
* Hmmm, how to avoid deadlock? They should not happen if everyone
|
||
* locks the key resources in the same order; but who knows.
|
||
* A solution is to use only one lock file in the gnupg homedir but
|
||
* what will happen with key resources which normally don't belong
|
||
* to the gpg homedir?
|
||
*/
|
||
static void
|
||
lock_rentry( RESTBL *rentry )
|
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{
|
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if( !rentry->lockhd ) {
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rentry->lockhd = create_dotlock( rentry->fname );
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if( !rentry->lockhd )
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log_fatal("can't allocate lock for `%s'\n", rentry->fname );
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rentry->is_locked = 0;
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}
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if( !rentry->is_locked ) {
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if( make_dotlock( rentry->lockhd, -1 ) )
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||
log_fatal("can't lock `%s'\n", rentry->fname );
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rentry->is_locked = 1;
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||
}
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||
}
|
||
|
||
static void
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unlock_rentry( RESTBL *rentry )
|
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{
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if( opt.lock_once )
|
||
return;
|
||
if( !release_dotlock( rentry->lockhd ) )
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||
rentry->is_locked = 0;
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||
}
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/****************************************************************
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****************** public functions ****************************
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||
****************************************************************/
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||
|
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/****************
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* Get the name of the keyrings, start with a sequence number pointing to a 0.
|
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*/
|
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const char *
|
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enum_keyblock_resources( int *sequence, int secret )
|
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{
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||
int i = *sequence;
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const char *name = NULL;
|
||
|
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for(; i < MAX_RESOURCES; i++ )
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if( resource_table[i].used && !resource_table[i].secret == !secret ) {
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if( resource_table[i].fname ) {
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name = resource_table[i].fname;
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break;
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}
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}
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*sequence = ++i;
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return name;
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}
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/****************
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* Register a resource (which currently may only be a keyring file).
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* The first keyring which is added by this function is
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* created if it does not exist.
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* Note: this function may be called before secure memory is
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* available.
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*/
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int
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add_keyblock_resource( const char *url, int force, int secret )
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{
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static int any_secret, any_public;
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const char *resname = url;
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IOBUF iobuf = NULL;
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int i;
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char *filename = NULL;
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int rc = 0;
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enum resource_type rt = rt_UNKNOWN;
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/* Do we have an URL?
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* gnupg-kbxf:filename := this is a KBX file resource
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* gnupg-ring:filename := this is a plain keyring
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* filename := See what is is, but create as plain keyring.
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*/
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if( strlen( resname ) > 11 ) {
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if( !strncmp( resname, "gnupg-ring:", 11 ) ) {
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rt = rt_RING;
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resname += 11;
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}
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else if( !strncmp( resname, "gnupg-kbxf:", 11 ) ) {
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rt = rt_KBXF;
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resname += 11;
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}
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#ifndef HAVE_DRIVE_LETTERS
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else if( strchr( resname, ':' ) ) {
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log_error("%s: invalid URL\n", url );
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rc = GPGERR_GENERAL;
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goto leave;
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}
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#endif
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}
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if( *resname != '/' ) { /* do tilde expansion etc */
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if( strchr(resname, '/') )
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filename = make_filename(resname, NULL);
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else
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filename = make_filename(opt.homedir, resname, NULL);
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}
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else
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filename = gcry_xstrdup( resname );
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if( !force )
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force = secret? !any_secret : !any_public;
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for(i=0; i < MAX_RESOURCES; i++ )
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if( !resource_table[i].used )
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break;
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if( i == MAX_RESOURCES ) {
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rc = GPGERR_RESOURCE_LIMIT;
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goto leave;
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}
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/* see whether we can determine the filetype */
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if( rt == rt_UNKNOWN ) {
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FILE *fp = fopen( filename, "rb" );
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if( fp ) {
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u32 magic;
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if( fread( &magic, 4, 1, fp) == 1 ) {
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char buf[8];
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rt = rt_RING;
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if( fread( buf, 8, 1, fp) == 1 ) {
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if( !memcmp( buf+4, "KBXf", 4 )
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&& buf[0] == 1 && buf[1] == 1 ) {
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rt = rt_KBXF;
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}
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}
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}
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else /* maybe empty: assume ring */
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rt = rt_RING;
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fclose( fp );
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}
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else /* no file yet: create ring */
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rt = rt_RING;
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}
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switch( rt ) {
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case rt_UNKNOWN:
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log_error("%s: unknown resource type\n", url );
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rc = GPGERR_GENERAL;
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goto leave;
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case rt_RING:
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case rt_KBXF:
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iobuf = iobuf_open( filename );
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if( !iobuf && !force ) {
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rc = GPGERR_OPEN_FILE;
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goto leave;
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}
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if( !iobuf ) {
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char *last_slash_in_filename;
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last_slash_in_filename = strrchr(filename, '/');
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*last_slash_in_filename = 0;
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if( access(filename, F_OK) ) {
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/* on the first time we try to create the default homedir and
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* in this case the process will be terminated, so that on the
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* next invocation it can read the options file in on startup
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*/
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try_make_homedir( filename );
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rc = GPGERR_OPEN_FILE;
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goto leave;
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}
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*last_slash_in_filename = '/';
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iobuf = iobuf_create( filename );
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if( !iobuf ) {
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log_error(_("%s: can't create keyring: %s\n"),
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filename, strerror(errno));
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rc = GPGERR_OPEN_FILE;
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goto leave;
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}
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else {
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#ifndef HAVE_DOSISH_SYSTEM
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if( secret ) {
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if( chmod( filename, S_IRUSR | S_IWUSR ) ) {
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log_error("%s: chmod failed: %s\n",
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filename, strerror(errno) );
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rc = GPGERR_WRITE_FILE;
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goto leave;
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}
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}
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#endif
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if( !opt.quiet )
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log_info(_("%s: keyring created\n"), filename );
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}
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}
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#if HAVE_DOSISH_SYSTEM || 1
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iobuf_close( iobuf );
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iobuf = NULL;
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/* must close it again */
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#endif
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break;
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default:
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log_error("%s: unsupported resource type\n", url );
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rc = GPGERR_GENERAL;
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goto leave;
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}
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#ifndef HAVE_DOSISH_SYSTEM
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#if 0 /* fixme: check directory permissions and print a warning */
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if( secret ) {
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}
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#endif
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#endif
|
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|
||
/* fixme: avoid duplicate resources */
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resource_table[i].used = 1;
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resource_table[i].secret = !!secret;
|
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resource_table[i].fname = gcry_xstrdup(filename);
|
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resource_table[i].iobuf = iobuf;
|
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resource_table[i].rt = rt;
|
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if( secret )
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default_secret_resource = i;
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else
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default_public_resource = i;
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|
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leave:
|
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if( rc )
|
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log_error("keyblock resource `%s': %s\n", filename, gpg_errstr(rc) );
|
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else if( secret )
|
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any_secret = 1;
|
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else
|
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any_public = 1;
|
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gcry_free( filename );
|
||
return rc;
|
||
}
|
||
|
||
/****************
|
||
* Return the resource name of the keyblock associated with KBPOS.
|
||
*/
|
||
const char *
|
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keyblock_resource_name( KBPOS kbpos )
|
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{
|
||
RESTBL *rentry;
|
||
|
||
if( !(rentry = check_pos( kbpos )) || !rentry->fname )
|
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log_bug("no name for keyblock resource %d\n", kbpos->resno );
|
||
return rentry->fname;
|
||
}
|
||
|
||
|
||
/****************
|
||
* Get a keyblock handle KBPOS from a filename. This can be used
|
||
* to get a handle for insert_keyblock for a new keyblock.
|
||
* Using a filename of NULL returns the default resource
|
||
*/
|
||
int
|
||
get_keyblock_handle( const char *filename, int secret, KBPOS kbpos )
|
||
{
|
||
int i = 0;
|
||
|
||
if( !filename )
|
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i = secret? default_secret_resource : default_public_resource;
|
||
|
||
for(; i < MAX_RESOURCES; i++ ) {
|
||
if( resource_table[i].used && !resource_table[i].secret == !secret ) {
|
||
/* fixme: dos needs case insensitive file compare */
|
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if( !filename || !strcmp( resource_table[i].fname, filename ) ) {
|
||
memset( kbpos, 0, sizeof *kbpos );
|
||
kbpos->resno = i;
|
||
kbpos->rt = resource_table[i].rt;
|
||
return 0;
|
||
}
|
||
}
|
||
}
|
||
return -1; /* not found */
|
||
}
|
||
|
||
|
||
/****************
|
||
* Return the filename of the firstkeyblock resource which is intended
|
||
* for write access. This will either be the default resource or in
|
||
* case this is not writable one of the others. If no writable is found,
|
||
* the default filename in the homedirectory will be returned.
|
||
* Caller must free, will never return NULL.
|
||
*/
|
||
char *
|
||
get_writable_keyblock_file( int secret )
|
||
{
|
||
int i = secret? default_secret_resource : default_public_resource;
|
||
|
||
if( resource_table[i].used && !resource_table[i].secret == !secret ) {
|
||
if( !access( resource_table[i].fname, R_OK|W_OK ) ) {
|
||
return gcry_xstrdup( resource_table[i].fname );
|
||
}
|
||
}
|
||
for(i=0; i < MAX_RESOURCES; i++ ) {
|
||
if( resource_table[i].used && !resource_table[i].secret == !secret ) {
|
||
if( !access( resource_table[i].fname, R_OK|W_OK ) ) {
|
||
return gcry_xstrdup( resource_table[i].fname );
|
||
}
|
||
}
|
||
}
|
||
/* Assume the home dir is always writable */
|
||
return make_filename(opt.homedir, secret? "secring.gpg"
|
||
: "pubring.gpg", NULL );
|
||
}
|
||
|
||
|
||
void
|
||
ringedit_copy_kbpos ( KBPOS d, KBPOS s )
|
||
{
|
||
*d = *s;
|
||
}
|
||
|
||
|
||
/****************
|
||
* Lock the keyblock; wait until it's available
|
||
* This function may change the internal data in kbpos, in cases
|
||
* when the keyblock to be locked has been modified.
|
||
* fixme: remove this function and add an option to search()?
|
||
*/
|
||
static int
|
||
lock_keyblock( KBPOS kbpos )
|
||
{
|
||
if( !check_pos(kbpos) )
|
||
return GPGERR_GENERAL;
|
||
return 0;
|
||
}
|
||
|
||
/****************
|
||
* Release a lock on a keyblock
|
||
*/
|
||
static void
|
||
unlock_keyblock( KBPOS kbpos )
|
||
{
|
||
if( !check_pos(kbpos) )
|
||
BUG();
|
||
}
|
||
|
||
|
||
static int
|
||
enum_keyrings_open_helper( KBPOS kbpos, int where )
|
||
{
|
||
int i = where;
|
||
RESTBL *rentry;
|
||
|
||
for(; i < MAX_RESOURCES; i++ )
|
||
if( resource_table[i].used
|
||
&& !resource_table[i].secret == !kbpos->secret )
|
||
break;
|
||
if( i == MAX_RESOURCES )
|
||
return -1; /* no resources */
|
||
kbpos->resno = i;
|
||
rentry = check_pos( kbpos );
|
||
kbpos->rt = resource_table[i].rt;
|
||
kbpos->valid = 0;
|
||
switch( kbpos->rt ) {
|
||
case rt_RING:
|
||
case rt_KBXF:
|
||
kbpos->fp = iobuf_open( rentry->fname );
|
||
if ( !kbpos->fp ) {
|
||
log_error("can't open `%s'\n", rentry->fname );
|
||
return GPGERR_OPEN_FILE;
|
||
}
|
||
break;
|
||
|
||
default: BUG();
|
||
}
|
||
kbpos->pkt = NULL;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/****************
|
||
* This set of functions is used to scan over all keyrings.
|
||
* The mode in enum_keyblocks_next() is used liek this:
|
||
* Mode is: 1 = read
|
||
* 11 = read but skip signature and comment packets.
|
||
*/
|
||
int
|
||
enum_keyblocks_begin( KBPOS *rkbpos, int use_secret )
|
||
{
|
||
int rc, i;
|
||
KBPOS kbpos;
|
||
|
||
*rkbpos = NULL;
|
||
|
||
kbpos = gcry_xcalloc( 1, sizeof *kbpos );
|
||
kbpos->fp = NULL;
|
||
kbpos->rt = rt_UNKNOWN;
|
||
if( !use_secret ) {
|
||
kbpos->secret = 0;
|
||
i = 0;
|
||
}
|
||
else {
|
||
kbpos->secret = 1;
|
||
i = 0;
|
||
}
|
||
|
||
rc = enum_keyrings_open_helper( kbpos, i );
|
||
if ( rc ) {
|
||
gcry_free( kbpos );
|
||
return rc;
|
||
}
|
||
/* return the handle */
|
||
*rkbpos = kbpos;
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
enum_keyblocks_end( KBPOS kbpos )
|
||
{
|
||
if ( !kbpos )
|
||
return;
|
||
switch( kbpos->rt ) {
|
||
case rt_RING:
|
||
case rt_KBXF:
|
||
if( kbpos->fp ) {
|
||
iobuf_close( kbpos->fp );
|
||
kbpos->fp = NULL;
|
||
}
|
||
break;
|
||
case rt_UNKNOWN:
|
||
/* this happens when we have no keyring at all */
|
||
gcry_free( kbpos );
|
||
return;
|
||
|
||
default:
|
||
BUG();
|
||
}
|
||
/* release pending packet */
|
||
free_packet( kbpos->pkt );
|
||
gcry_free( kbpos->pkt );
|
||
gcry_free( kbpos );
|
||
}
|
||
|
||
int
|
||
enum_keyblocks_next( KBPOS kbpos, int mode, KBNODE *ret_root )
|
||
{
|
||
int cont, rc = 0;
|
||
RESTBL *rentry;
|
||
|
||
if( mode != 1 && mode != 11 )
|
||
return GPGERR_INV_ARG;
|
||
|
||
do {
|
||
cont = 0;
|
||
switch( kbpos->rt ) {
|
||
case rt_RING:
|
||
if( !kbpos->fp )
|
||
return GPGERR_GENERAL;
|
||
rc = keyring_enum( kbpos, ret_root, mode == 11 );
|
||
break;
|
||
case rt_KBXF:
|
||
if( !kbpos->fp )
|
||
return GPGERR_GENERAL;
|
||
rc = do_kbxf_enum( kbpos, ret_root, mode == 11 );
|
||
break;
|
||
default: BUG();
|
||
}
|
||
|
||
if( rc == -1 ) {
|
||
RESTBL *rentry;
|
||
int i;
|
||
|
||
assert( !kbpos->pkt );
|
||
rentry = check_pos( kbpos );
|
||
assert(rentry);
|
||
i = kbpos->resno+1;
|
||
/* first close */
|
||
if( kbpos->fp ) {
|
||
iobuf_close( kbpos->fp );
|
||
kbpos->fp = NULL;
|
||
}
|
||
free_packet( kbpos->pkt );
|
||
gcry_free( kbpos->pkt );
|
||
kbpos->pkt = NULL;
|
||
/* and then open the next one */
|
||
rc = enum_keyrings_open_helper( kbpos, i );
|
||
if ( !rc )
|
||
cont = 1;
|
||
/* hmm, that is not really correct: if we got an error kbpos
|
||
* might be not well anymore */
|
||
}
|
||
} while(cont);
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
|
||
/****************
|
||
* Insert the keyblock described by ROOT into the keyring described
|
||
* by KBPOS. This actually appends the data to the keyfile.
|
||
*/
|
||
int
|
||
insert_keyblock( KBNODE root )
|
||
{
|
||
int rc;
|
||
#if 0
|
||
if( !check_pos(kbpos) )
|
||
return GPGERR_GENERAL;
|
||
|
||
switch( kbpos->rt ) {
|
||
case rt_RING:
|
||
rc = keyring_copy( kbpos, 1, root );
|
||
break;
|
||
case rt_KBXF:
|
||
rc = do_kbxf_copy( kbpos, 1, root );
|
||
break;
|
||
default: BUG();
|
||
}
|
||
#endif
|
||
return rc;
|
||
}
|
||
|
||
/****************
|
||
* Delete the keyblock described by KBPOS.
|
||
* The current code simply changes the keyblock in the keyring
|
||
* to packet of type 0 with the correct length. To help detect errors,
|
||
* zero bytes are written.
|
||
*/
|
||
int
|
||
delete_keyblock( KBNODE keyblock )
|
||
{
|
||
int rc;
|
||
#if 0
|
||
if( !check_pos(kbpos) )
|
||
return GPGERR_GENERAL;
|
||
|
||
switch( kbpos->rt ) {
|
||
case rt_RING:
|
||
rc = keyring_copy( kbpos, 2, NULL );
|
||
break;
|
||
case rt_KBXF:
|
||
rc = do_kbxf_copy( kbpos, 2, NULL );
|
||
break;
|
||
default: BUG();
|
||
}
|
||
#endif
|
||
return rc;
|
||
}
|
||
|
||
|
||
/****************
|
||
* Update the keyblock in the ring (or whatever resource) one in ROOT.
|
||
*/
|
||
int
|
||
update_keyblock( KBNODE root )
|
||
{
|
||
int rc;
|
||
struct keyblock_pos_struct kbpos;
|
||
|
||
/* We need to get the file position of original keyblock first */
|
||
if ( root->pkt->pkttype == PKT_PUBLIC_KEY )
|
||
rc = find_kblocation_bypk( &kbpos, root->pkt->pkt.public_key );
|
||
else if ( root->pkt->pkttype == PKT_SECRET_KEY )
|
||
rc = find_kblocation_bysk( &kbpos, root->pkt->pkt.secret_key );
|
||
else
|
||
BUG();
|
||
|
||
if ( rc )
|
||
return rc;
|
||
|
||
if( !check_pos(&kbpos) )
|
||
return GPGERR_GENERAL;
|
||
|
||
switch( kbpos.rt ) {
|
||
case rt_RING:
|
||
rc = keyring_copy( &kbpos, 3, root );
|
||
break;
|
||
case rt_KBXF:
|
||
rc = do_kbxf_copy( &kbpos, 3, root );
|
||
break;
|
||
default: BUG();
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
/****************************************************************
|
||
********** Functions which operates on regular keyrings ********
|
||
****************************************************************/
|
||
|
||
static int
|
||
keyring_enum( KBPOS kbpos, KBNODE *ret_root, int skipsigs )
|
||
{
|
||
PACKET *pkt;
|
||
int rc;
|
||
RESTBL *rentry;
|
||
KBNODE root = NULL;
|
||
ulong offset, first_offset=0;
|
||
|
||
if( !(rentry=check_pos(kbpos)) )
|
||
return GPGERR_GENERAL;
|
||
|
||
if( kbpos->pkt ) {
|
||
root = new_kbnode( kbpos->pkt );
|
||
first_offset = kbpos->save_offset;
|
||
kbpos->pkt = NULL;
|
||
}
|
||
kbpos->valid = 0;
|
||
|
||
pkt = gcry_xmalloc( sizeof *pkt );
|
||
init_packet(pkt);
|
||
while( (rc=parse_packet(kbpos->fp, pkt, &offset )) != -1 ) {
|
||
if( rc ) { /* ignore errors */
|
||
if( rc != GPGERR_UNKNOWN_PACKET ) {
|
||
log_error("keyring_enum: read error: %s\n", gpg_errstr(rc) );
|
||
rc = GPGERR_INV_KEYRING;
|
||
goto ready;
|
||
}
|
||
free_packet( pkt );
|
||
init_packet( pkt );
|
||
continue;
|
||
}
|
||
/* make a linked list of all packets */
|
||
switch( pkt->pkttype ) {
|
||
case PKT_COMPRESSED:
|
||
log_error("skipped compressed packet in keyring\n" );
|
||
free_packet(pkt);
|
||
init_packet(pkt);
|
||
break;
|
||
|
||
case PKT_PUBLIC_KEY:
|
||
case PKT_SECRET_KEY:
|
||
if( root ) { /* save this packet */
|
||
kbpos->pkt = pkt;
|
||
kbpos->save_offset = offset;
|
||
pkt = NULL;
|
||
goto ready;
|
||
}
|
||
root = new_kbnode( pkt );
|
||
first_offset = offset;
|
||
pkt = gcry_xmalloc( sizeof *pkt );
|
||
init_packet(pkt);
|
||
break;
|
||
|
||
default:
|
||
/* skip pakets at the beginning of a keyring, until we find
|
||
* a start packet; issue a warning if it is not a comment */
|
||
if( !root && pkt->pkttype != PKT_COMMENT
|
||
&& pkt->pkttype != PKT_OLD_COMMENT ) {
|
||
break;
|
||
}
|
||
if( !root || (skipsigs && ( pkt->pkttype == PKT_SIGNATURE
|
||
||pkt->pkttype == PKT_COMMENT
|
||
||pkt->pkttype == PKT_OLD_COMMENT )) ) {
|
||
init_packet(pkt);
|
||
break;
|
||
}
|
||
add_kbnode( root, new_kbnode( pkt ) );
|
||
pkt = gcry_xmalloc( sizeof *pkt );
|
||
init_packet(pkt);
|
||
break;
|
||
}
|
||
}
|
||
ready:
|
||
if( rc == -1 && root )
|
||
rc = 0;
|
||
|
||
if( rc )
|
||
release_kbnode( root );
|
||
else {
|
||
if ( root ) {
|
||
kbpos->offset = first_offset;
|
||
kbpos->valid = 1;
|
||
}
|
||
*ret_root = root;
|
||
}
|
||
free_packet( pkt );
|
||
gcry_free( pkt );
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
/****************
|
||
* Perform insert/delete/update operation.
|
||
* mode 1 = insert
|
||
* 2 = delete
|
||
* 3 = update
|
||
*/
|
||
static int
|
||
keyring_copy( KBPOS kbpos, int mode, KBNODE root )
|
||
{
|
||
RESTBL *rentry;
|
||
IOBUF fp, newfp;
|
||
int rc=0;
|
||
char *bakfname = NULL;
|
||
char *tmpfname = NULL;
|
||
#warning We need to lock the keyring while we are editing it.
|
||
/* rethink this whole module */
|
||
|
||
if( !(rentry = check_pos( kbpos )) )
|
||
return GPGERR_GENERAL;
|
||
|
||
if( opt.dry_run )
|
||
return 0;
|
||
|
||
lock_rentry( rentry );
|
||
|
||
/* open the source file */
|
||
if( kbpos->fp ) {
|
||
/* BUG(); not allowed with such a handle */
|
||
log_debug("keyring_copy: closing fp %p\n", kbpos->fp );
|
||
iobuf_close (kbpos->fp);
|
||
kbpos->fp = NULL;
|
||
kbpos->valid = 0;
|
||
}
|
||
fp = iobuf_open( rentry->fname );
|
||
if( mode == 1 && !fp && errno == ENOENT ) { /* no file yet */
|
||
KBNODE kbctx, node;
|
||
|
||
/* insert: create a new file */
|
||
newfp = iobuf_create( rentry->fname );
|
||
if( !newfp ) {
|
||
log_error(_("%s: can't create: %s\n"), rentry->fname, strerror(errno));
|
||
unlock_rentry( rentry );
|
||
return GPGERR_OPEN_FILE;
|
||
}
|
||
else if( !opt.quiet )
|
||
log_info(_("%s: keyring created\n"), rentry->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, gpg_errstr(rc) );
|
||
iobuf_cancel(newfp);
|
||
unlock_rentry( rentry );
|
||
return GPGERR_WRITE_FILE;
|
||
}
|
||
}
|
||
if( iobuf_close(newfp) ) {
|
||
log_error("%s: close failed: %s\n", rentry->fname, strerror(errno));
|
||
unlock_rentry( rentry );
|
||
return GPGERR_CLOSE_FILE;
|
||
}
|
||
if( chmod( rentry->fname, S_IRUSR | S_IWUSR ) ) {
|
||
log_error("%s: chmod failed: %s\n",
|
||
rentry->fname, strerror(errno) );
|
||
unlock_rentry( rentry );
|
||
return GPGERR_WRITE_FILE;
|
||
}
|
||
return 0;
|
||
}
|
||
if( !fp ) {
|
||
log_error("%s: can't open: %s\n", rentry->fname, strerror(errno) );
|
||
rc = GPGERR_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(rentry->fname) > 4
|
||
&& !strcmp(rentry->fname+strlen(rentry->fname)-4, ".gpg") ) {
|
||
bakfname = gcry_xmalloc( strlen( rentry->fname ) + 1 );
|
||
strcpy(bakfname,rentry->fname);
|
||
strcpy(bakfname+strlen(rentry->fname)-4, ".bak");
|
||
tmpfname = gcry_xmalloc( strlen( rentry->fname ) + 1 );
|
||
strcpy(tmpfname,rentry->fname);
|
||
strcpy(tmpfname+strlen(rentry->fname)-4, ".tmp");
|
||
}
|
||
else { /* file does not end with gpg; hmmm */
|
||
bakfname = gcry_xmalloc( strlen( rentry->fname ) + 5 );
|
||
strcpy(stpcpy(bakfname,rentry->fname),".bak");
|
||
tmpfname = gcry_xmalloc( strlen( rentry->fname ) + 5 );
|
||
strcpy(stpcpy(tmpfname,rentry->fname),".tmp");
|
||
}
|
||
#else
|
||
bakfname = gcry_xmalloc( strlen( rentry->fname ) + 2 );
|
||
strcpy(stpcpy(bakfname,rentry->fname),"~");
|
||
tmpfname = gcry_xmalloc( strlen( rentry->fname ) + 5 );
|
||
strcpy(stpcpy(tmpfname,rentry->fname),".tmp");
|
||
#endif
|
||
newfp = iobuf_create( tmpfname );
|
||
if( !newfp ) {
|
||
log_error("%s: can't create: %s\n", tmpfname, strerror(errno) );
|
||
iobuf_close(fp);
|
||
rc = GPGERR_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",
|
||
rentry->fname, tmpfname, gpg_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, kbpos->offset );
|
||
if( rc ) { /* should never get EOF here */
|
||
log_error("%s: copy to %s failed: %s\n",
|
||
rentry->fname, tmpfname, gpg_errstr(rc) );
|
||
iobuf_close(fp);
|
||
iobuf_cancel(newfp);
|
||
goto leave;
|
||
}
|
||
/* skip this keyblock */
|
||
assert( kbpos->count );
|
||
rc = skip_some_packets( fp, kbpos->count );
|
||
if( rc ) {
|
||
log_error("%s: skipping %u packets failed: %s\n",
|
||
rentry->fname, kbpos->count, gpg_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, gpg_errstr(rc) );
|
||
iobuf_close(fp);
|
||
iobuf_cancel(newfp);
|
||
rc = GPGERR_WRITE_FILE;
|
||
goto leave;
|
||
}
|
||
}
|
||
kbpos->valid = 0;
|
||
}
|
||
|
||
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",
|
||
rentry->fname, tmpfname, gpg_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", rentry->fname, strerror(errno) );
|
||
rc = GPGERR_CLOSE_FILE;
|
||
goto leave;
|
||
}
|
||
if( iobuf_close(newfp) ) {
|
||
log_error("%s: close failed: %s\n", tmpfname, strerror(errno) );
|
||
rc = GPGERR_CLOSE_FILE;
|
||
goto leave;
|
||
}
|
||
/* if the new file is a secring, restrict the permissions */
|
||
#ifndef HAVE_DOSISH_SYSTEM
|
||
if( rentry->secret ) {
|
||
if( chmod( tmpfname, S_IRUSR | S_IWUSR ) ) {
|
||
log_error("%s: chmod failed: %s\n",
|
||
tmpfname, strerror(errno) );
|
||
rc = GPGERR_WRITE_FILE;
|
||
goto leave;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* rename and make backup file */
|
||
if( !rentry->secret ) { /* but not for secret keyrings */
|
||
#ifdef HAVE_DOSISH_SYSTEM
|
||
remove( bakfname );
|
||
#endif
|
||
if( rename( rentry->fname, bakfname ) ) {
|
||
log_error("%s: rename to %s failed: %s\n",
|
||
rentry->fname, bakfname, strerror(errno) );
|
||
rc = GPGERR_RENAME_FILE;
|
||
goto leave;
|
||
}
|
||
}
|
||
#ifdef HAVE_DOSISH_SYSTEM
|
||
remove( rentry->fname );
|
||
#endif
|
||
if( rename( tmpfname, rentry->fname ) ) {
|
||
log_error("%s: rename to %s failed: %s\n",
|
||
tmpfname, rentry->fname,strerror(errno) );
|
||
rc = GPGERR_RENAME_FILE;
|
||
if( rentry->secret ) {
|
||
log_info(_(
|
||
"WARNING: 2 files with confidential information exists.\n"));
|
||
log_info(_("%s is the unchanged one\n"), rentry->fname );
|
||
log_info(_("%s is the new one\n"), tmpfname );
|
||
log_info(_("Please fix this possible security flaw\n"));
|
||
}
|
||
goto leave;
|
||
}
|
||
|
||
leave:
|
||
unlock_rentry( rentry );
|
||
gcry_free(bakfname);
|
||
gcry_free(tmpfname);
|
||
return rc;
|
||
}
|
||
|
||
|
||
/****************************************************************
|
||
********** Functions which operate on KBX files ****************
|
||
****************************************************************/
|
||
|
||
static int
|
||
do_kbxf_enum( KBPOS kbpos, KBNODE *ret_root, int skipsigs )
|
||
{
|
||
PACKET *pkt;
|
||
int rc;
|
||
RESTBL *rentry;
|
||
KBNODE root = NULL;
|
||
|
||
if( !(rentry=check_pos(kbpos)) )
|
||
return GPGERR_GENERAL;
|
||
|
||
if( kbpos->pkt ) {
|
||
root = new_kbnode( kbpos->pkt );
|
||
kbpos->pkt = NULL;
|
||
}
|
||
|
||
pkt = gcry_xmalloc( sizeof *pkt );
|
||
init_packet(pkt);
|
||
while( (rc=parse_packet(kbpos->fp, pkt, NULL)) != -1 ) {
|
||
if( rc ) { /* ignore errors */
|
||
if( rc != GPGERR_UNKNOWN_PACKET ) {
|
||
log_error("do_kbxf_enum: read error: %s\n", gpg_errstr(rc) );
|
||
rc = GPGERR_INV_KEYRING;
|
||
goto ready;
|
||
}
|
||
free_packet( pkt );
|
||
init_packet( pkt );
|
||
continue;
|
||
}
|
||
/* make a linked list of all packets */
|
||
switch( pkt->pkttype ) {
|
||
case PKT_COMPRESSED:
|
||
log_error("skipped compressed packet in keyring\n" );
|
||
free_packet(pkt);
|
||
init_packet(pkt);
|
||
break;
|
||
|
||
case PKT_PUBLIC_KEY:
|
||
case PKT_SECRET_KEY:
|
||
if( root ) { /* store this packet */
|
||
kbpos->pkt = pkt;
|
||
pkt = NULL;
|
||
goto ready;
|
||
}
|
||
root = new_kbnode( pkt );
|
||
pkt = gcry_xmalloc( sizeof *pkt );
|
||
init_packet(pkt);
|
||
break;
|
||
|
||
default:
|
||
/* skip pakets at the beginning of a keyring, until we find
|
||
* a start packet; issue a warning if it is not a comment */
|
||
if( !root && pkt->pkttype != PKT_COMMENT
|
||
&& pkt->pkttype != PKT_OLD_COMMENT ) {
|
||
break;
|
||
}
|
||
if( !root || (skipsigs && ( pkt->pkttype == PKT_SIGNATURE
|
||
||pkt->pkttype == PKT_COMMENT
|
||
||pkt->pkttype == PKT_OLD_COMMENT )) ) {
|
||
init_packet(pkt);
|
||
break;
|
||
}
|
||
add_kbnode( root, new_kbnode( pkt ) );
|
||
pkt = gcry_xmalloc( sizeof *pkt );
|
||
init_packet(pkt);
|
||
break;
|
||
}
|
||
}
|
||
ready:
|
||
if( rc == -1 && root )
|
||
rc = 0;
|
||
|
||
if( rc )
|
||
release_kbnode( root );
|
||
else
|
||
*ret_root = root;
|
||
free_packet( pkt );
|
||
gcry_free( pkt );
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
/****************
|
||
* Perform insert/delete/update operation.
|
||
* mode 1 = insert
|
||
* 2 = delete
|
||
* 3 = update
|
||
*/
|
||
static int
|
||
do_kbxf_copy( KBPOS kbpos, int mode, KBNODE root )
|
||
{
|
||
RESTBL *rentry;
|
||
IOBUF fp, newfp;
|
||
int rc=0;
|
||
char *bakfname = NULL;
|
||
char *tmpfname = NULL;
|
||
|
||
if( !(rentry = check_pos( kbpos )) )
|
||
return GPGERR_GENERAL;
|
||
if( kbpos->fp )
|
||
BUG(); /* not allowed with such a handle */
|
||
|
||
if( opt.dry_run )
|
||
return 0;
|
||
|
||
lock_rentry( rentry );
|
||
|
||
/* open the source file */
|
||
fp = iobuf_open( rentry->fname );
|
||
if( mode == 1 && !fp && errno == ENOENT ) { /* no file yet */
|
||
KBNODE kbctx, node;
|
||
|
||
/* insert: create a new file */
|
||
newfp = iobuf_create( rentry->fname );
|
||
if( !newfp ) {
|
||
log_error(_("%s: can't create: %s\n"), rentry->fname, strerror(errno));
|
||
unlock_rentry( rentry );
|
||
return GPGERR_OPEN_FILE;
|
||
}
|
||
else if( !opt.quiet )
|
||
log_info(_("%s: keyring created\n"), rentry->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, gpg_errstr(rc) );
|
||
iobuf_cancel(newfp);
|
||
unlock_rentry( rentry );
|
||
return GPGERR_WRITE_FILE;
|
||
}
|
||
}
|
||
if( iobuf_close(newfp) ) {
|
||
log_error("%s: close failed: %s\n", rentry->fname, strerror(errno));
|
||
unlock_rentry( rentry );
|
||
return GPGERR_CLOSE_FILE;
|
||
}
|
||
if( chmod( rentry->fname, S_IRUSR | S_IWUSR ) ) {
|
||
log_error("%s: chmod failed: %s\n",
|
||
rentry->fname, strerror(errno) );
|
||
unlock_rentry( rentry );
|
||
return GPGERR_WRITE_FILE;
|
||
}
|
||
return 0;
|
||
}
|
||
if( !fp ) {
|
||
log_error("%s: can't open: %s\n", rentry->fname, strerror(errno) );
|
||
rc = GPGERR_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(rentry->fname) > 4
|
||
&& !strcmp(rentry->fname+strlen(rentry->fname)-4, ".gpg") ) {
|
||
bakfname = gcry_xmalloc( strlen( rentry->fname ) + 1 );
|
||
strcpy(bakfname,rentry->fname);
|
||
strcpy(bakfname+strlen(rentry->fname)-4, ".bak");
|
||
tmpfname = gcry_xmalloc( strlen( rentry->fname ) + 1 );
|
||
strcpy(tmpfname,rentry->fname);
|
||
strcpy(tmpfname+strlen(rentry->fname)-4, ".tmp");
|
||
}
|
||
else { /* file does not end with gpg; hmmm */
|
||
bakfname = gcry_xmalloc( strlen( rentry->fname ) + 5 );
|
||
strcpy(stpcpy(bakfname,rentry->fname),".bak");
|
||
tmpfname = gcry_xmalloc( strlen( rentry->fname ) + 5 );
|
||
strcpy(stpcpy(tmpfname,rentry->fname),".tmp");
|
||
}
|
||
#else
|
||
bakfname = gcry_xmalloc( strlen( rentry->fname ) + 2 );
|
||
strcpy(stpcpy(bakfname,rentry->fname),"~");
|
||
tmpfname = gcry_xmalloc( strlen( rentry->fname ) + 5 );
|
||
strcpy(stpcpy(tmpfname,rentry->fname),".tmp");
|
||
#endif
|
||
newfp = iobuf_create( tmpfname );
|
||
if( !newfp ) {
|
||
log_error("%s: can't create: %s\n", tmpfname, strerror(errno) );
|
||
iobuf_close(fp);
|
||
rc = GPGERR_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",
|
||
rentry->fname, tmpfname, gpg_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, kbpos->offset );
|
||
if( rc ) { /* should never get EOF here */
|
||
log_error("%s: copy to %s failed: %s\n",
|
||
rentry->fname, tmpfname, gpg_errstr(rc) );
|
||
iobuf_close(fp);
|
||
iobuf_cancel(newfp);
|
||
goto leave;
|
||
}
|
||
/* skip this keyblock */
|
||
assert( kbpos->count );
|
||
rc = skip_some_packets( fp, kbpos->count );
|
||
if( rc ) {
|
||
log_error("%s: skipping %u packets failed: %s\n",
|
||
rentry->fname, kbpos->count, gpg_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, gpg_errstr(rc) );
|
||
iobuf_close(fp);
|
||
iobuf_cancel(newfp);
|
||
rc = GPGERR_WRITE_FILE;
|
||
goto leave;
|
||
}
|
||
}
|
||
kbpos->valid = 0;
|
||
}
|
||
|
||
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",
|
||
rentry->fname, tmpfname, gpg_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", rentry->fname, strerror(errno) );
|
||
rc = GPGERR_CLOSE_FILE;
|
||
goto leave;
|
||
}
|
||
if( iobuf_close(newfp) ) {
|
||
log_error("%s: close failed: %s\n", tmpfname, strerror(errno) );
|
||
rc = GPGERR_CLOSE_FILE;
|
||
goto leave;
|
||
}
|
||
/* if the new file is a secring, restrict the permissions */
|
||
#ifndef HAVE_DOSISH_SYSTEM
|
||
if( rentry->secret ) {
|
||
if( chmod( tmpfname, S_IRUSR | S_IWUSR ) ) {
|
||
log_error("%s: chmod failed: %s\n",
|
||
tmpfname, strerror(errno) );
|
||
rc = GPGERR_WRITE_FILE;
|
||
goto leave;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* rename and make backup file */
|
||
if( !rentry->secret ) { /* but not for secret keyrings */
|
||
#ifdef HAVE_DOSISH_SYSTEM
|
||
remove( bakfname );
|
||
#endif
|
||
if( rename( rentry->fname, bakfname ) ) {
|
||
log_error("%s: rename to %s failed: %s\n",
|
||
rentry->fname, bakfname, strerror(errno) );
|
||
rc = GPGERR_RENAME_FILE;
|
||
goto leave;
|
||
}
|
||
}
|
||
#ifdef HAVE_DOSISH_SYSTEM
|
||
remove( rentry->fname );
|
||
#endif
|
||
if( rename( tmpfname, rentry->fname ) ) {
|
||
log_error("%s: rename to %s failed: %s\n",
|
||
tmpfname, rentry->fname,strerror(errno) );
|
||
rc = GPGERR_RENAME_FILE;
|
||
if( rentry->secret ) {
|
||
log_info(_(
|
||
"WARNING: 2 files with confidential information exists.\n"));
|
||
log_info(_("%s is the unchanged one\n"), rentry->fname );
|
||
log_info(_("%s is the new one\n"), tmpfname );
|
||
log_info(_("Please fix this possible security flaw\n"));
|
||
}
|
||
goto leave;
|
||
}
|
||
|
||
leave:
|
||
unlock_rentry( rentry );
|
||
gcry_free(bakfname);
|
||
gcry_free(tmpfname);
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
|