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9acbeac236
* kbx/keybox-search-desc.h (struct keydb_search_desc.skipfnc): Change third parameter to be the index of the user id packet in the keyblock rather than the packet itself. Update users. -- Signed-off-by: Neal H. Walfield <neal@g10code.com>. The keybox code doesn't work directly with keyblocks. As such, the matched user packet is not readily available to pass to DESC[n].SKIPFNC. But, we do know the index of the user id packet that matched. Thus, pass that instead. If the skip function needs the user id packet, it can use the key id to look up the key block and find the appropriate packet.
1193 lines
30 KiB
C
1193 lines
30 KiB
C
/* keybox-search.c - Search operations
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* Copyright (C) 2001, 2002, 2003, 2004, 2012,
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* 2013 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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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
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* 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
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include "../common/stringhelp.h" /* ascii_xxxx() */
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#include "keybox-defs.h"
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#include <gcrypt.h>
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#include "host2net.h"
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#include "mbox-util.h"
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#define xtoi_1(p) (*(p) <= '9'? (*(p)- '0'): \
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*(p) <= 'F'? (*(p)-'A'+10):(*(p)-'a'+10))
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#define xtoi_2(p) ((xtoi_1(p) * 16) + xtoi_1((p)+1))
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struct sn_array_s {
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int snlen;
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unsigned char *sn;
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};
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#define get32(a) buf32_to_ulong ((a))
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#define get16(a) buf16_to_ulong ((a))
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static inline unsigned int
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blob_get_blob_flags (KEYBOXBLOB blob)
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{
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const unsigned char *buffer;
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size_t length;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 8)
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return 0; /* oops */
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return get16 (buffer + 6);
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}
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/* Return the first keyid from the blob. Returns true if
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available. */
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static int
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blob_get_first_keyid (KEYBOXBLOB blob, u32 *kid)
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{
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const unsigned char *buffer;
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size_t length, nkeys, keyinfolen;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 48)
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return 0; /* blob too short */
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nkeys = get16 (buffer + 16);
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keyinfolen = get16 (buffer + 18);
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if (!nkeys || keyinfolen < 28)
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return 0; /* invalid blob */
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kid[0] = get32 (buffer + 32);
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kid[1] = get32 (buffer + 36);
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return 1;
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}
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/* Return information on the flag WHAT within the blob BUFFER,LENGTH.
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Return the offset and the length (in bytes) of the flag in
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FLAGOFF,FLAG_SIZE. */
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gpg_err_code_t
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_keybox_get_flag_location (const unsigned char *buffer, size_t length,
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int what, size_t *flag_off, size_t *flag_size)
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{
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size_t pos;
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size_t nkeys, keyinfolen;
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size_t nuids, uidinfolen;
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size_t nserial;
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size_t nsigs, siginfolen, siginfooff;
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switch (what)
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{
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case KEYBOX_FLAG_BLOB:
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if (length < 8)
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return GPG_ERR_INV_OBJ;
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*flag_off = 6;
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*flag_size = 2;
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break;
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case KEYBOX_FLAG_OWNERTRUST:
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case KEYBOX_FLAG_VALIDITY:
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case KEYBOX_FLAG_CREATED_AT:
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case KEYBOX_FLAG_SIG_INFO:
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if (length < 20)
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return GPG_ERR_INV_OBJ;
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/* Key info. */
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nkeys = get16 (buffer + 16);
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keyinfolen = get16 (buffer + 18 );
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if (keyinfolen < 28)
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return GPG_ERR_INV_OBJ;
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pos = 20 + keyinfolen*nkeys;
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if (pos+2 > length)
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return GPG_ERR_INV_OBJ; /* Out of bounds. */
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/* Serial number. */
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nserial = get16 (buffer+pos);
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pos += 2 + nserial;
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if (pos+4 > length)
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return GPG_ERR_INV_OBJ; /* Out of bounds. */
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/* User IDs. */
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nuids = get16 (buffer + pos); pos += 2;
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uidinfolen = get16 (buffer + pos); pos += 2;
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if (uidinfolen < 12 )
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return GPG_ERR_INV_OBJ;
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pos += uidinfolen*nuids;
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if (pos+4 > length)
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return GPG_ERR_INV_OBJ ; /* Out of bounds. */
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/* Signature info. */
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siginfooff = pos;
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nsigs = get16 (buffer + pos); pos += 2;
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siginfolen = get16 (buffer + pos); pos += 2;
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if (siginfolen < 4 )
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return GPG_ERR_INV_OBJ;
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pos += siginfolen*nsigs;
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if (pos+1+1+2+4+4+4+4 > length)
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return GPG_ERR_INV_OBJ ; /* Out of bounds. */
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*flag_size = 1;
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*flag_off = pos;
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switch (what)
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{
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case KEYBOX_FLAG_VALIDITY:
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*flag_off += 1;
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break;
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case KEYBOX_FLAG_CREATED_AT:
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*flag_size = 4;
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*flag_off += 1+2+4+4+4;
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break;
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case KEYBOX_FLAG_SIG_INFO:
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*flag_size = siginfolen * nsigs;
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*flag_off = siginfooff;
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break;
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default:
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break;
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}
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break;
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default:
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return GPG_ERR_INV_FLAG;
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}
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return 0;
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}
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/* Return one of the flags WHAT in VALUE from teh blob BUFFER of
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LENGTH bytes. Return 0 on success or an raw error code. */
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static gpg_err_code_t
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get_flag_from_image (const unsigned char *buffer, size_t length,
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int what, unsigned int *value)
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{
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gpg_err_code_t ec;
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size_t pos, size;
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*value = 0;
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ec = _keybox_get_flag_location (buffer, length, what, &pos, &size);
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if (!ec)
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switch (size)
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{
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case 1: *value = buffer[pos]; break;
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case 2: *value = get16 (buffer + pos); break;
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case 4: *value = get32 (buffer + pos); break;
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default: ec = GPG_ERR_BUG; break;
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}
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return ec;
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}
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static int
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blob_cmp_sn (KEYBOXBLOB blob, const unsigned char *sn, int snlen)
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{
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const unsigned char *buffer;
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size_t length;
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size_t pos, off;
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size_t nkeys, keyinfolen;
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size_t nserial;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 40)
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return 0; /* blob too short */
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/*keys*/
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nkeys = get16 (buffer + 16);
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keyinfolen = get16 (buffer + 18 );
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if (keyinfolen < 28)
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return 0; /* invalid blob */
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pos = 20 + keyinfolen*nkeys;
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if (pos+2 > length)
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return 0; /* out of bounds */
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/*serial*/
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nserial = get16 (buffer+pos);
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off = pos + 2;
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if (off+nserial > length)
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return 0; /* out of bounds */
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return nserial == snlen && !memcmp (buffer+off, sn, snlen);
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}
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/* Returns 0 if not found or the number of the key which was found.
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For X.509 this is always 1, for OpenPGP this is 1 for the primary
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key and 2 and more for the subkeys. */
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static int
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blob_cmp_fpr (KEYBOXBLOB blob, const unsigned char *fpr)
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{
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const unsigned char *buffer;
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size_t length;
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size_t pos, off;
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size_t nkeys, keyinfolen;
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int idx;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 40)
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return 0; /* blob too short */
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/*keys*/
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nkeys = get16 (buffer + 16);
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keyinfolen = get16 (buffer + 18 );
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if (keyinfolen < 28)
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return 0; /* invalid blob */
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pos = 20;
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if (pos + keyinfolen*nkeys > length)
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return 0; /* out of bounds */
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for (idx=0; idx < nkeys; idx++)
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{
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off = pos + idx*keyinfolen;
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if (!memcmp (buffer + off, fpr, 20))
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return idx+1; /* found */
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}
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return 0; /* not found */
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}
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static int
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blob_cmp_fpr_part (KEYBOXBLOB blob, const unsigned char *fpr,
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int fproff, int fprlen)
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{
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const unsigned char *buffer;
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size_t length;
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size_t pos, off;
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size_t nkeys, keyinfolen;
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int idx;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 40)
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return 0; /* blob too short */
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/*keys*/
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nkeys = get16 (buffer + 16);
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keyinfolen = get16 (buffer + 18 );
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if (keyinfolen < 28)
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return 0; /* invalid blob */
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pos = 20;
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if (pos + keyinfolen*nkeys > length)
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return 0; /* out of bounds */
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for (idx=0; idx < nkeys; idx++)
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{
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off = pos + idx*keyinfolen;
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if (!memcmp (buffer + off + fproff, fpr, fprlen))
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return idx+1; /* found */
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}
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return 0; /* not found */
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}
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static int
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blob_cmp_name (KEYBOXBLOB blob, int idx,
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const char *name, size_t namelen, int substr, int x509)
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{
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const unsigned char *buffer;
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size_t length;
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size_t pos, off, len;
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size_t nkeys, keyinfolen;
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size_t nuids, uidinfolen;
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size_t nserial;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 40)
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return 0; /* blob too short */
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/*keys*/
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nkeys = get16 (buffer + 16);
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keyinfolen = get16 (buffer + 18 );
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if (keyinfolen < 28)
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return 0; /* invalid blob */
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pos = 20 + keyinfolen*nkeys;
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if (pos+2 > length)
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return 0; /* out of bounds */
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/*serial*/
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nserial = get16 (buffer+pos);
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pos += 2 + nserial;
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if (pos+4 > length)
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return 0; /* out of bounds */
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/* user ids*/
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nuids = get16 (buffer + pos); pos += 2;
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uidinfolen = get16 (buffer + pos); pos += 2;
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if (uidinfolen < 12 /* should add a: || nuidinfolen > MAX_UIDINFOLEN */)
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return 0; /* invalid blob */
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if (pos + uidinfolen*nuids > length)
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return 0; /* out of bounds */
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if (idx < 0)
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{ /* Compare all names. Note that for X.509 we start with index 1
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so to skip the issuer at index 0. */
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for (idx = !!x509; idx < nuids; idx++)
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{
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size_t mypos = pos;
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mypos += idx*uidinfolen;
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off = get32 (buffer+mypos);
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len = get32 (buffer+mypos+4);
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if (off+len > length)
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return 0; /* error: better stop here out of bounds */
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if (len < 1)
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continue; /* empty name */
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if (substr)
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{
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if (ascii_memcasemem (buffer+off, len, name, namelen))
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return idx+1; /* found */
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}
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else
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{
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if (len == namelen && !memcmp (buffer+off, name, len))
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return idx+1; /* found */
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}
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}
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}
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else
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{
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if (idx > nuids)
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return 0; /* no user ID with that idx */
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pos += idx*uidinfolen;
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off = get32 (buffer+pos);
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len = get32 (buffer+pos+4);
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if (off+len > length)
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return 0; /* out of bounds */
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if (len < 1)
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return 0; /* empty name */
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if (substr)
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{
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if (ascii_memcasemem (buffer+off, len, name, namelen))
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return idx+1; /* found */
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}
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else
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{
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if (len == namelen && !memcmp (buffer+off, name, len))
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return idx+1; /* found */
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}
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}
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return 0; /* not found */
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}
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/* Compare all email addresses of the subject. With SUBSTR given as
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True a substring search is done in the mail address. The X509 flag
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indicated whether the search is done on an X.509 blob. */
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static int
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blob_cmp_mail (KEYBOXBLOB blob, const char *name, size_t namelen, int substr,
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int x509)
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{
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const unsigned char *buffer;
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size_t length;
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size_t pos, off, len;
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size_t nkeys, keyinfolen;
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size_t nuids, uidinfolen;
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size_t nserial;
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int idx;
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/* fixme: this code is common to blob_cmp_mail */
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 40)
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return 0; /* blob too short */
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/*keys*/
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nkeys = get16 (buffer + 16);
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keyinfolen = get16 (buffer + 18 );
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if (keyinfolen < 28)
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return 0; /* invalid blob */
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pos = 20 + keyinfolen*nkeys;
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if (pos+2 > length)
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return 0; /* out of bounds */
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/*serial*/
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nserial = get16 (buffer+pos);
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pos += 2 + nserial;
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if (pos+4 > length)
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return 0; /* out of bounds */
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/* user ids*/
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nuids = get16 (buffer + pos); pos += 2;
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uidinfolen = get16 (buffer + pos); pos += 2;
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if (uidinfolen < 12 /* should add a: || nuidinfolen > MAX_UIDINFOLEN */)
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return 0; /* invalid blob */
|
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if (pos + uidinfolen*nuids > length)
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return 0; /* out of bounds */
|
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|
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if (namelen < 1)
|
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return 0;
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/* Note that for X.509 we start at index 1 becuase index 0 is used
|
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for the issuer name. */
|
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for (idx=!!x509 ;idx < nuids; idx++)
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{
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size_t mypos = pos;
|
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size_t mylen;
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mypos += idx*uidinfolen;
|
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off = get32 (buffer+mypos);
|
||
len = get32 (buffer+mypos+4);
|
||
if (off+len > length)
|
||
return 0; /* error: better stop here - out of bounds */
|
||
if (x509)
|
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{
|
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if (len < 2 || buffer[off] != '<')
|
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continue; /* empty name or trailing 0 not stored */
|
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len--; /* one back */
|
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if ( len < 3 || buffer[off+len] != '>')
|
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continue; /* not a proper email address */
|
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off++;
|
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len--;
|
||
}
|
||
else /* OpenPGP. */
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{
|
||
/* We need to forward to the mailbox part. */
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mypos = off;
|
||
mylen = len;
|
||
for ( ; len && buffer[off] != '<'; len--, off++)
|
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;
|
||
if (len < 2 || buffer[off] != '<')
|
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{
|
||
/* Mailbox not explicitly given or too short. Restore
|
||
OFF and LEN and check whether the entire string
|
||
resembles a mailbox without the angle brackets. */
|
||
off = mypos;
|
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len = mylen;
|
||
if (!is_valid_mailbox_mem (buffer+off, len))
|
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continue; /* Not a mail address. */
|
||
}
|
||
else /* Seems to be standard user id with mail address. */
|
||
{
|
||
off++; /* Point to first char of the mail address. */
|
||
len--;
|
||
/* Search closing '>'. */
|
||
for (mypos=off; len && buffer[mypos] != '>'; len--, mypos++)
|
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;
|
||
if (!len || buffer[mypos] != '>' || off == mypos)
|
||
continue; /* Not a proper mail address. */
|
||
len = mypos - off;
|
||
}
|
||
|
||
}
|
||
|
||
if (substr)
|
||
{
|
||
if (ascii_memcasemem (buffer+off, len, name, namelen))
|
||
return idx+1; /* found */
|
||
}
|
||
else
|
||
{
|
||
if (len == namelen && !ascii_memcasecmp (buffer+off, name, len))
|
||
return idx+1; /* found */
|
||
}
|
||
}
|
||
return 0; /* not found */
|
||
}
|
||
|
||
|
||
#ifdef KEYBOX_WITH_X509
|
||
/* Return true if the key in BLOB matches the 20 bytes keygrip GRIP.
|
||
We don't have the keygrips as meta data, thus we need to parse the
|
||
certificate. Fixme: We might want to return proper error codes
|
||
instead of failing a search for invalid certificates etc. */
|
||
static int
|
||
blob_x509_has_grip (KEYBOXBLOB blob, const unsigned char *grip)
|
||
{
|
||
int rc;
|
||
const unsigned char *buffer;
|
||
size_t length;
|
||
size_t cert_off, cert_len;
|
||
ksba_reader_t reader = NULL;
|
||
ksba_cert_t cert = NULL;
|
||
ksba_sexp_t p = NULL;
|
||
gcry_sexp_t s_pkey;
|
||
unsigned char array[20];
|
||
unsigned char *rcp;
|
||
size_t n;
|
||
|
||
buffer = _keybox_get_blob_image (blob, &length);
|
||
if (length < 40)
|
||
return 0; /* Too short. */
|
||
cert_off = get32 (buffer+8);
|
||
cert_len = get32 (buffer+12);
|
||
if (cert_off+cert_len > length)
|
||
return 0; /* Too short. */
|
||
|
||
rc = ksba_reader_new (&reader);
|
||
if (rc)
|
||
return 0; /* Problem with ksba. */
|
||
rc = ksba_reader_set_mem (reader, buffer+cert_off, cert_len);
|
||
if (rc)
|
||
goto failed;
|
||
rc = ksba_cert_new (&cert);
|
||
if (rc)
|
||
goto failed;
|
||
rc = ksba_cert_read_der (cert, reader);
|
||
if (rc)
|
||
goto failed;
|
||
p = ksba_cert_get_public_key (cert);
|
||
if (!p)
|
||
goto failed;
|
||
n = gcry_sexp_canon_len (p, 0, NULL, NULL);
|
||
if (!n)
|
||
goto failed;
|
||
rc = gcry_sexp_sscan (&s_pkey, NULL, (char*)p, n);
|
||
if (rc)
|
||
{
|
||
gcry_sexp_release (s_pkey);
|
||
goto failed;
|
||
}
|
||
rcp = gcry_pk_get_keygrip (s_pkey, array);
|
||
gcry_sexp_release (s_pkey);
|
||
if (!rcp)
|
||
goto failed; /* Can't calculate keygrip. */
|
||
|
||
xfree (p);
|
||
ksba_cert_release (cert);
|
||
ksba_reader_release (reader);
|
||
return !memcmp (array, grip, 20);
|
||
failed:
|
||
xfree (p);
|
||
ksba_cert_release (cert);
|
||
ksba_reader_release (reader);
|
||
return 0;
|
||
}
|
||
#endif /*KEYBOX_WITH_X509*/
|
||
|
||
|
||
|
||
/*
|
||
The has_foo functions are used as helpers for search
|
||
*/
|
||
static inline int
|
||
has_short_kid (KEYBOXBLOB blob, u32 lkid)
|
||
{
|
||
unsigned char buf[4];
|
||
buf[0] = lkid >> 24;
|
||
buf[1] = lkid >> 16;
|
||
buf[2] = lkid >> 8;
|
||
buf[3] = lkid;
|
||
return blob_cmp_fpr_part (blob, buf, 16, 4);
|
||
}
|
||
|
||
static inline int
|
||
has_long_kid (KEYBOXBLOB blob, u32 mkid, u32 lkid)
|
||
{
|
||
unsigned char buf[8];
|
||
buf[0] = mkid >> 24;
|
||
buf[1] = mkid >> 16;
|
||
buf[2] = mkid >> 8;
|
||
buf[3] = mkid;
|
||
buf[4] = lkid >> 24;
|
||
buf[5] = lkid >> 16;
|
||
buf[6] = lkid >> 8;
|
||
buf[7] = lkid;
|
||
return blob_cmp_fpr_part (blob, buf, 12, 8);
|
||
}
|
||
|
||
static inline int
|
||
has_fingerprint (KEYBOXBLOB blob, const unsigned char *fpr)
|
||
{
|
||
return blob_cmp_fpr (blob, fpr);
|
||
}
|
||
|
||
static inline int
|
||
has_keygrip (KEYBOXBLOB blob, const unsigned char *grip)
|
||
{
|
||
#ifdef KEYBOX_WITH_X509
|
||
if (blob_get_type (blob) == KEYBOX_BLOBTYPE_X509)
|
||
return blob_x509_has_grip (blob, grip);
|
||
#else
|
||
(void)blob;
|
||
(void)grip;
|
||
#endif
|
||
return 0;
|
||
}
|
||
|
||
|
||
static inline int
|
||
has_issuer (KEYBOXBLOB blob, const char *name)
|
||
{
|
||
size_t namelen;
|
||
|
||
return_val_if_fail (name, 0);
|
||
|
||
if (blob_get_type (blob) != KEYBOX_BLOBTYPE_X509)
|
||
return 0;
|
||
|
||
namelen = strlen (name);
|
||
return blob_cmp_name (blob, 0 /* issuer */, name, namelen, 0, 1);
|
||
}
|
||
|
||
static inline int
|
||
has_issuer_sn (KEYBOXBLOB blob, const char *name,
|
||
const unsigned char *sn, int snlen)
|
||
{
|
||
size_t namelen;
|
||
|
||
return_val_if_fail (name, 0);
|
||
return_val_if_fail (sn, 0);
|
||
|
||
if (blob_get_type (blob) != KEYBOX_BLOBTYPE_X509)
|
||
return 0;
|
||
|
||
namelen = strlen (name);
|
||
|
||
return (blob_cmp_sn (blob, sn, snlen)
|
||
&& blob_cmp_name (blob, 0 /* issuer */, name, namelen, 0, 1));
|
||
}
|
||
|
||
static inline int
|
||
has_sn (KEYBOXBLOB blob, const unsigned char *sn, int snlen)
|
||
{
|
||
return_val_if_fail (sn, 0);
|
||
|
||
if (blob_get_type (blob) != KEYBOX_BLOBTYPE_X509)
|
||
return 0;
|
||
return blob_cmp_sn (blob, sn, snlen);
|
||
}
|
||
|
||
static inline int
|
||
has_subject (KEYBOXBLOB blob, const char *name)
|
||
{
|
||
size_t namelen;
|
||
|
||
return_val_if_fail (name, 0);
|
||
|
||
if (blob_get_type (blob) != KEYBOX_BLOBTYPE_X509)
|
||
return 0;
|
||
|
||
namelen = strlen (name);
|
||
return blob_cmp_name (blob, 1 /* subject */, name, namelen, 0, 1);
|
||
}
|
||
|
||
|
||
static inline int
|
||
has_username (KEYBOXBLOB blob, const char *name, int substr)
|
||
{
|
||
size_t namelen;
|
||
int btype;
|
||
|
||
return_val_if_fail (name, 0);
|
||
|
||
btype = blob_get_type (blob);
|
||
if (btype != KEYBOX_BLOBTYPE_PGP && btype != KEYBOX_BLOBTYPE_X509)
|
||
return 0;
|
||
|
||
namelen = strlen (name);
|
||
return blob_cmp_name (blob, -1 /* all subject/user names */, name,
|
||
namelen, substr, (btype == KEYBOX_BLOBTYPE_X509));
|
||
}
|
||
|
||
|
||
static inline int
|
||
has_mail (KEYBOXBLOB blob, const char *name, int substr)
|
||
{
|
||
size_t namelen;
|
||
int btype;
|
||
|
||
return_val_if_fail (name, 0);
|
||
|
||
btype = blob_get_type (blob);
|
||
if (btype != KEYBOX_BLOBTYPE_PGP && btype != KEYBOX_BLOBTYPE_X509)
|
||
return 0;
|
||
|
||
if (btype == KEYBOX_BLOBTYPE_PGP && *name == '<')
|
||
name++; /* Hack to remove the leading '<' for gpg. */
|
||
|
||
namelen = strlen (name);
|
||
if (namelen && name[namelen-1] == '>')
|
||
namelen--;
|
||
return blob_cmp_mail (blob, name, namelen, substr,
|
||
(btype == KEYBOX_BLOBTYPE_X509));
|
||
}
|
||
|
||
|
||
static void
|
||
release_sn_array (struct sn_array_s *array, size_t size)
|
||
{
|
||
size_t n;
|
||
|
||
for (n=0; n < size; n++)
|
||
xfree (array[n].sn);
|
||
xfree (array);
|
||
}
|
||
|
||
|
||
/*
|
||
|
||
The search API
|
||
|
||
*/
|
||
|
||
int
|
||
keybox_search_reset (KEYBOX_HANDLE hd)
|
||
{
|
||
if (!hd)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
if (hd->found.blob)
|
||
{
|
||
_keybox_release_blob (hd->found.blob);
|
||
hd->found.blob = NULL;
|
||
}
|
||
|
||
if (hd->fp)
|
||
{
|
||
fclose (hd->fp);
|
||
hd->fp = NULL;
|
||
}
|
||
hd->error = 0;
|
||
hd->eof = 0;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Note: When in ephemeral mode the search function does visit all
|
||
blobs but in standard mode, blobs flagged as ephemeral are ignored.
|
||
If WANT_BLOBTYPE is not 0 only blobs of this type are considered.
|
||
The value at R_SKIPPED is updated by the number of skipped long
|
||
records (counts PGP and X.509). */
|
||
int
|
||
keybox_search (KEYBOX_HANDLE hd, KEYBOX_SEARCH_DESC *desc, size_t ndesc,
|
||
keybox_blobtype_t want_blobtype,
|
||
size_t *r_descindex, unsigned long *r_skipped)
|
||
{
|
||
int rc;
|
||
size_t n;
|
||
int need_words, any_skip;
|
||
KEYBOXBLOB blob = NULL;
|
||
struct sn_array_s *sn_array = NULL;
|
||
int pk_no, uid_no;
|
||
|
||
if (!hd)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
/* clear last found result */
|
||
if (hd->found.blob)
|
||
{
|
||
_keybox_release_blob (hd->found.blob);
|
||
hd->found.blob = NULL;
|
||
}
|
||
|
||
if (hd->error)
|
||
return hd->error; /* still in error state */
|
||
if (hd->eof)
|
||
return -1; /* still EOF */
|
||
|
||
/* figure out what information we need */
|
||
need_words = any_skip = 0;
|
||
for (n=0; n < ndesc; n++)
|
||
{
|
||
switch (desc[n].mode)
|
||
{
|
||
case KEYDB_SEARCH_MODE_WORDS:
|
||
need_words = 1;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_FIRST:
|
||
/* always restart the search in this mode */
|
||
keybox_search_reset (hd);
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
if (desc[n].skipfnc)
|
||
any_skip = 1;
|
||
if (desc[n].snlen == -1 && !sn_array)
|
||
{
|
||
sn_array = xtrycalloc (ndesc, sizeof *sn_array);
|
||
if (!sn_array)
|
||
return (hd->error = gpg_error_from_syserror ());
|
||
}
|
||
}
|
||
|
||
(void)need_words; /* Not yet implemented. */
|
||
|
||
if (!hd->fp)
|
||
{
|
||
hd->fp = fopen (hd->kb->fname, "rb");
|
||
if (!hd->fp)
|
||
{
|
||
hd->error = gpg_error_from_syserror ();
|
||
xfree (sn_array);
|
||
return hd->error;
|
||
}
|
||
}
|
||
|
||
/* Kludge: We need to convert an SN given as hexstring to its binary
|
||
representation - in some cases we are not able to store it in the
|
||
search descriptor, because due to the way we use it, it is not
|
||
possible to free allocated memory. */
|
||
if (sn_array)
|
||
{
|
||
const unsigned char *s;
|
||
int i, odd;
|
||
size_t snlen;
|
||
|
||
for (n=0; n < ndesc; n++)
|
||
{
|
||
if (!desc[n].sn)
|
||
;
|
||
else if (desc[n].snlen == -1)
|
||
{
|
||
unsigned char *sn;
|
||
|
||
s = desc[n].sn;
|
||
for (i=0; *s && *s != '/'; s++, i++)
|
||
;
|
||
odd = (i & 1);
|
||
snlen = (i+1)/2;
|
||
sn_array[n].sn = xtrymalloc (snlen);
|
||
if (!sn_array[n].sn)
|
||
{
|
||
hd->error = gpg_error_from_syserror ();
|
||
release_sn_array (sn_array, n);
|
||
return hd->error;
|
||
}
|
||
sn_array[n].snlen = snlen;
|
||
sn = sn_array[n].sn;
|
||
s = desc[n].sn;
|
||
if (odd)
|
||
{
|
||
*sn++ = xtoi_1 (s);
|
||
s++;
|
||
}
|
||
for (; *s && *s != '/'; s += 2)
|
||
*sn++ = xtoi_2 (s);
|
||
}
|
||
else
|
||
{
|
||
const unsigned char *sn;
|
||
|
||
sn = desc[n].sn;
|
||
snlen = desc[n].snlen;
|
||
sn_array[n].sn = xtrymalloc (snlen);
|
||
if (!sn_array[n].sn)
|
||
{
|
||
hd->error = gpg_error_from_syserror ();
|
||
release_sn_array (sn_array, n);
|
||
return hd->error;
|
||
}
|
||
sn_array[n].snlen = snlen;
|
||
memcpy (sn_array[n].sn, sn, snlen);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
pk_no = uid_no = 0;
|
||
for (;;)
|
||
{
|
||
unsigned int blobflags;
|
||
int blobtype;
|
||
|
||
_keybox_release_blob (blob); blob = NULL;
|
||
rc = _keybox_read_blob (&blob, hd->fp);
|
||
if (gpg_err_code (rc) == GPG_ERR_TOO_LARGE
|
||
&& gpg_err_source (rc) == GPG_ERR_SOURCE_KEYBOX)
|
||
{
|
||
++*r_skipped;
|
||
continue; /* Skip too large records. */
|
||
}
|
||
|
||
if (rc)
|
||
break;
|
||
|
||
blobtype = blob_get_type (blob);
|
||
if (blobtype == KEYBOX_BLOBTYPE_HEADER)
|
||
continue;
|
||
if (want_blobtype && blobtype != want_blobtype)
|
||
continue;
|
||
|
||
blobflags = blob_get_blob_flags (blob);
|
||
if (!hd->ephemeral && (blobflags & 2))
|
||
continue; /* Not in ephemeral mode but blob is flagged ephemeral. */
|
||
|
||
for (n=0; n < ndesc; n++)
|
||
{
|
||
switch (desc[n].mode)
|
||
{
|
||
case KEYDB_SEARCH_MODE_NONE:
|
||
never_reached ();
|
||
break;
|
||
case KEYDB_SEARCH_MODE_EXACT:
|
||
uid_no = has_username (blob, desc[n].u.name, 0);
|
||
if (uid_no)
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_MAIL:
|
||
uid_no = has_mail (blob, desc[n].u.name, 0);
|
||
if (uid_no)
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_MAILSUB:
|
||
uid_no = has_mail (blob, desc[n].u.name, 1);
|
||
if (uid_no)
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_SUBSTR:
|
||
uid_no = has_username (blob, desc[n].u.name, 1);
|
||
if (uid_no)
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_MAILEND:
|
||
case KEYDB_SEARCH_MODE_WORDS:
|
||
/* not yet implemented */
|
||
break;
|
||
case KEYDB_SEARCH_MODE_ISSUER:
|
||
if (has_issuer (blob, desc[n].u.name))
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_ISSUER_SN:
|
||
if (has_issuer_sn (blob, desc[n].u.name,
|
||
sn_array? sn_array[n].sn : desc[n].sn,
|
||
sn_array? sn_array[n].snlen : desc[n].snlen))
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_SN:
|
||
if (has_sn (blob, sn_array? sn_array[n].sn : desc[n].sn,
|
||
sn_array? sn_array[n].snlen : desc[n].snlen))
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_SUBJECT:
|
||
if (has_subject (blob, desc[n].u.name))
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_SHORT_KID:
|
||
pk_no = has_short_kid (blob, desc[n].u.kid[1]);
|
||
if (pk_no)
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_LONG_KID:
|
||
pk_no = has_long_kid (blob, desc[n].u.kid[0], desc[n].u.kid[1]);
|
||
if (pk_no)
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_FPR:
|
||
case KEYDB_SEARCH_MODE_FPR20:
|
||
pk_no = has_fingerprint (blob, desc[n].u.fpr);
|
||
if (pk_no)
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_KEYGRIP:
|
||
if (has_keygrip (blob, desc[n].u.grip))
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_FIRST:
|
||
goto found;
|
||
break;
|
||
case KEYDB_SEARCH_MODE_NEXT:
|
||
goto found;
|
||
break;
|
||
default:
|
||
rc = gpg_error (GPG_ERR_INV_VALUE);
|
||
goto found;
|
||
}
|
||
}
|
||
continue;
|
||
found:
|
||
/* Record which DESC we matched on. Note this value is only
|
||
meaningful if this function returns with no errors. */
|
||
if(r_descindex)
|
||
*r_descindex = n;
|
||
for (n=any_skip?0:ndesc; n < ndesc; n++)
|
||
{
|
||
u32 kid[2];
|
||
|
||
if (desc[n].skipfnc
|
||
&& blob_get_first_keyid (blob, kid)
|
||
&& desc[n].skipfnc (desc[n].skipfncvalue, kid, uid_no))
|
||
break;
|
||
}
|
||
if (n == ndesc)
|
||
break; /* got it */
|
||
}
|
||
|
||
if (!rc)
|
||
{
|
||
hd->found.blob = blob;
|
||
hd->found.pk_no = pk_no;
|
||
hd->found.uid_no = uid_no;
|
||
}
|
||
else if (rc == -1)
|
||
{
|
||
_keybox_release_blob (blob);
|
||
hd->eof = 1;
|
||
}
|
||
else
|
||
{
|
||
_keybox_release_blob (blob);
|
||
hd->error = rc;
|
||
}
|
||
|
||
if (sn_array)
|
||
release_sn_array (sn_array, ndesc);
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
|
||
/*
|
||
Functions to return a certificate or a keyblock. To be used after
|
||
a successful search operation.
|
||
*/
|
||
|
||
|
||
/* Return the last found keyblock. Returns 0 on success and stores a
|
||
new iobuf at R_IOBUF and a signature status vector at R_SIGSTATUS
|
||
in that case. R_UID_NO and R_PK_NO are used to retun the number of
|
||
the key or user id which was matched the search criteria; if not
|
||
known they are set to 0. */
|
||
gpg_error_t
|
||
keybox_get_keyblock (KEYBOX_HANDLE hd, iobuf_t *r_iobuf,
|
||
int *r_pk_no, int *r_uid_no, u32 **r_sigstatus)
|
||
{
|
||
gpg_error_t err;
|
||
const unsigned char *buffer, *p;
|
||
size_t length;
|
||
size_t image_off, image_len;
|
||
size_t siginfo_off, siginfo_len;
|
||
u32 *sigstatus, n, n_sigs, sigilen;
|
||
|
||
*r_iobuf = NULL;
|
||
*r_sigstatus = NULL;
|
||
|
||
if (!hd)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
if (!hd->found.blob)
|
||
return gpg_error (GPG_ERR_NOTHING_FOUND);
|
||
|
||
if (blob_get_type (hd->found.blob) != KEYBOX_BLOBTYPE_PGP)
|
||
return gpg_error (GPG_ERR_WRONG_BLOB_TYPE);
|
||
|
||
buffer = _keybox_get_blob_image (hd->found.blob, &length);
|
||
if (length < 40)
|
||
return gpg_error (GPG_ERR_TOO_SHORT);
|
||
image_off = get32 (buffer+8);
|
||
image_len = get32 (buffer+12);
|
||
if (image_off+image_len > length)
|
||
return gpg_error (GPG_ERR_TOO_SHORT);
|
||
|
||
err = _keybox_get_flag_location (buffer, length, KEYBOX_FLAG_SIG_INFO,
|
||
&siginfo_off, &siginfo_len);
|
||
if (err)
|
||
return err;
|
||
n_sigs = get16 (buffer + siginfo_off);
|
||
sigilen = get16 (buffer + siginfo_off + 2);
|
||
p = buffer + siginfo_off + 4;
|
||
sigstatus = xtrymalloc ((1+n_sigs) * sizeof *sigstatus);
|
||
if (!sigstatus)
|
||
return gpg_error_from_syserror ();
|
||
sigstatus[0] = n_sigs;
|
||
for (n=1; n <= n_sigs; n++, p += sigilen)
|
||
sigstatus[n] = get32 (p);
|
||
|
||
*r_pk_no = hd->found.pk_no;
|
||
*r_uid_no = hd->found.uid_no;
|
||
*r_sigstatus = sigstatus;
|
||
*r_iobuf = iobuf_temp_with_content (buffer+image_off, image_len);
|
||
return 0;
|
||
}
|
||
|
||
|
||
#ifdef KEYBOX_WITH_X509
|
||
/*
|
||
Return the last found cert. Caller must free it.
|
||
*/
|
||
int
|
||
keybox_get_cert (KEYBOX_HANDLE hd, ksba_cert_t *r_cert)
|
||
{
|
||
const unsigned char *buffer;
|
||
size_t length;
|
||
size_t cert_off, cert_len;
|
||
ksba_reader_t reader = NULL;
|
||
ksba_cert_t cert = NULL;
|
||
int rc;
|
||
|
||
if (!hd)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
if (!hd->found.blob)
|
||
return gpg_error (GPG_ERR_NOTHING_FOUND);
|
||
|
||
if (blob_get_type (hd->found.blob) != KEYBOX_BLOBTYPE_X509)
|
||
return gpg_error (GPG_ERR_WRONG_BLOB_TYPE);
|
||
|
||
buffer = _keybox_get_blob_image (hd->found.blob, &length);
|
||
if (length < 40)
|
||
return gpg_error (GPG_ERR_TOO_SHORT);
|
||
cert_off = get32 (buffer+8);
|
||
cert_len = get32 (buffer+12);
|
||
if (cert_off+cert_len > length)
|
||
return gpg_error (GPG_ERR_TOO_SHORT);
|
||
|
||
rc = ksba_reader_new (&reader);
|
||
if (rc)
|
||
return rc;
|
||
rc = ksba_reader_set_mem (reader, buffer+cert_off, cert_len);
|
||
if (rc)
|
||
{
|
||
ksba_reader_release (reader);
|
||
/* fixme: need to map the error codes */
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
|
||
rc = ksba_cert_new (&cert);
|
||
if (rc)
|
||
{
|
||
ksba_reader_release (reader);
|
||
return rc;
|
||
}
|
||
|
||
rc = ksba_cert_read_der (cert, reader);
|
||
if (rc)
|
||
{
|
||
ksba_cert_release (cert);
|
||
ksba_reader_release (reader);
|
||
/* fixme: need to map the error codes */
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
|
||
*r_cert = cert;
|
||
ksba_reader_release (reader);
|
||
return 0;
|
||
}
|
||
|
||
#endif /*KEYBOX_WITH_X509*/
|
||
|
||
/* Return the flags named WHAT at the address of VALUE. IDX is used
|
||
only for certain flags and should be 0 if not required. */
|
||
int
|
||
keybox_get_flags (KEYBOX_HANDLE hd, int what, int idx, unsigned int *value)
|
||
{
|
||
const unsigned char *buffer;
|
||
size_t length;
|
||
gpg_err_code_t ec;
|
||
|
||
(void)idx; /* Not yet used. */
|
||
|
||
if (!hd)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
if (!hd->found.blob)
|
||
return gpg_error (GPG_ERR_NOTHING_FOUND);
|
||
|
||
buffer = _keybox_get_blob_image (hd->found.blob, &length);
|
||
ec = get_flag_from_image (buffer, length, what, value);
|
||
return ec? gpg_error (ec):0;
|
||
}
|