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gnupg/g10/test-stubs.c
Werner Koch 6a4443c842
gpg: Make use of the included key block in a signature.
* g10/import.c (read_key_from_file): Rename to ...
(read_key_from_file_or_buffer): this and add new parameters.  Adjust
callers.
(import_included_key_block): New.
* g10/packet.h (PKT_signature): Add field flags.key_block.
* g10/parse-packet.c (parse_signature): Set that flags.
* g10/sig-check.c (check_signature2): Add parm forced_pk and change
all callers.
* g10/mainproc.c (do_check_sig): Ditto.
(check_sig_and_print): Try the included key block if no key is
available.
--

This is is the second part to support the new Key Block subpacket.
The idea is that after having received a signed mail, it is instantly
possible to reply encrypted - without the need for any centralized
infrastructure.

There is one case where this does not work: A signed mail is received
using a specified signer ID (e.g. using gpg --sender option) and the
key block with only that user ID is thus imported.  The next time a
mail is received using the same key but with a different user ID; the
signatures checks out using the key imported the last time.  However,
the new user id is not imported.  Now when trying to reply to that
last mail, no key will be found.  We need to see whether we can update
a key in such a case.

GnuPG-bug-id: 4856
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-13 17:14:34 +01:00

568 lines
9.8 KiB
C

/* test-stubs.c - The GnuPG signature verify utility
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005, 2006,
* 2008, 2009, 2012 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#define INCLUDED_BY_MAIN_MODULE 1
#include "gpg.h"
#include "../common/util.h"
#include "packet.h"
#include "../common/iobuf.h"
#include "main.h"
#include "options.h"
#include "keydb.h"
#include "trustdb.h"
#include "filter.h"
#include "../common/ttyio.h"
#include "../common/i18n.h"
#include "../common/sysutils.h"
#include "../common/status.h"
#include "call-agent.h"
int g10_errors_seen;
void
g10_exit( int rc )
{
rc = rc? rc : log_get_errorcount(0)? 2 : g10_errors_seen? 1 : 0;
exit(rc );
}
/* Stub:
* We have to override the trustcheck from pkclist.c because
* this utility assumes that all keys in the keyring are trustworthy
*/
int
check_signatures_trust (ctrl_t ctrl, PKT_signature *sig)
{
(void)ctrl;
(void)sig;
return 0;
}
void
read_trust_options (ctrl_t ctrl,
byte *trust_model, ulong *created, ulong *nextcheck,
byte *marginals, byte *completes, byte *cert_depth,
byte *min_cert_level)
{
(void)ctrl;
(void)trust_model;
(void)created;
(void)nextcheck;
(void)marginals;
(void)completes;
(void)cert_depth;
(void)min_cert_level;
}
/* Stub:
* We don't have the trustdb , so we have to provide some stub functions
* instead
*/
int
cache_disabled_value (ctrl_t ctrl, PKT_public_key *pk)
{
(void)ctrl;
(void)pk;
return 0;
}
void
check_trustdb_stale (ctrl_t ctrl)
{
(void)ctrl;
}
int
get_validity_info (ctrl_t ctrl, kbnode_t kb, PKT_public_key *pk,
PKT_user_id *uid)
{
(void)ctrl;
(void)kb;
(void)pk;
(void)uid;
return '?';
}
unsigned int
get_validity (ctrl_t ctrl, kbnode_t kb, PKT_public_key *pk, PKT_user_id *uid,
PKT_signature *sig, int may_ask)
{
(void)ctrl;
(void)kb;
(void)pk;
(void)uid;
(void)sig;
(void)may_ask;
return 0;
}
const char *
trust_value_to_string (unsigned int value)
{
(void)value;
return "err";
}
const char *
uid_trust_string_fixed (ctrl_t ctrl, PKT_public_key *key, PKT_user_id *uid)
{
(void)ctrl;
(void)key;
(void)uid;
return "err";
}
int
get_ownertrust_info (ctrl_t ctrl, PKT_public_key *pk, int no_create)
{
(void)ctrl;
(void)pk;
(void)no_create;
return '?';
}
unsigned int
get_ownertrust (ctrl_t ctrl, PKT_public_key *pk)
{
(void)ctrl;
(void)pk;
return TRUST_UNKNOWN;
}
/* Stubs:
* Because we only work with trusted keys, it does not make sense to
* get them from a keyserver
*/
struct keyserver_spec *
keyserver_match (struct keyserver_spec *spec)
{
(void)spec;
return NULL;
}
int
keyserver_any_configured (ctrl_t ctrl)
{
(void)ctrl;
return 0;
}
int
keyserver_import_keyid (u32 *keyid, void *dummy, int quick)
{
(void)keyid;
(void)dummy;
(void)quick;
return -1;
}
int
keyserver_import_fprint (ctrl_t ctrl, const byte *fprint,size_t fprint_len,
struct keyserver_spec *keyserver, int quick)
{
(void)ctrl;
(void)fprint;
(void)fprint_len;
(void)keyserver;
(void)quick;
return -1;
}
int
keyserver_import_cert (const char *name)
{
(void)name;
return -1;
}
int
keyserver_import_pka (const char *name,unsigned char *fpr)
{
(void)name;
(void)fpr;
return -1;
}
gpg_error_t
keyserver_import_wkd (ctrl_t ctrl, const char *name, int quick,
unsigned char **fpr, size_t *fpr_len)
{
(void)ctrl;
(void)name;
(void)quick;
(void)fpr;
(void)fpr_len;
return GPG_ERR_BUG;
}
int
keyserver_import_name (const char *name,struct keyserver_spec *spec)
{
(void)name;
(void)spec;
return -1;
}
int
keyserver_import_ldap (const char *name)
{
(void)name;
return -1;
}
gpg_error_t
read_key_from_file_or_buffer (ctrl_t ctrl, const char *fname,
const void *buffer, size_t buflen,
kbnode_t *r_keyblock)
{
(void)ctrl;
(void)fname;
(void)buffer;
(void)buflen;
(void)r_keyblock;
return -1;
}
gpg_error_t
import_included_key_block (ctrl_t ctrl, kbnode_t keyblock)
{
(void)ctrl;
(void)keyblock;
return -1;
}
/* Stub:
* No encryption here but mainproc links to these functions.
*/
gpg_error_t
get_session_key (ctrl_t ctrl, struct pubkey_enc_list *k, DEK *dek)
{
(void)ctrl;
(void)k;
(void)dek;
return GPG_ERR_GENERAL;
}
/* Stub: */
gpg_error_t
get_override_session_key (DEK *dek, const char *string)
{
(void)dek;
(void)string;
return GPG_ERR_GENERAL;
}
/* Stub: */
int
decrypt_data (ctrl_t ctrl, void *procctx, PKT_encrypted *ed, DEK *dek)
{
(void)ctrl;
(void)procctx;
(void)ed;
(void)dek;
return GPG_ERR_GENERAL;
}
/* Stub:
* No interactive commands, so we don't need the helptexts
*/
void
display_online_help (const char *keyword)
{
(void)keyword;
}
/* Stub:
* We don't use secret keys, but getkey.c links to this
*/
int
check_secret_key (PKT_public_key *pk, int n)
{
(void)pk;
(void)n;
return GPG_ERR_GENERAL;
}
/* Stub:
* No secret key, so no passphrase needed
*/
DEK *
passphrase_to_dek (int cipher_algo, STRING2KEY *s2k, int create, int nocache,
const char *tmp, int *canceled)
{
(void)cipher_algo;
(void)s2k;
(void)create;
(void)nocache;
(void)tmp;
if (canceled)
*canceled = 0;
return NULL;
}
void
passphrase_clear_cache (const char *cacheid)
{
(void)cacheid;
}
struct keyserver_spec *
parse_preferred_keyserver(PKT_signature *sig)
{
(void)sig;
return NULL;
}
struct keyserver_spec *
parse_keyserver_uri (const char *uri, int require_scheme,
const char *configname, unsigned int configlineno)
{
(void)uri;
(void)require_scheme;
(void)configname;
(void)configlineno;
return NULL;
}
void
free_keyserver_spec (struct keyserver_spec *keyserver)
{
(void)keyserver;
}
/* Stubs to avoid linking to photoid.c */
void
show_photos (const struct user_attribute *attrs, int count, PKT_public_key *pk)
{
(void)attrs;
(void)count;
(void)pk;
}
int
parse_image_header (const struct user_attribute *attr, byte *type, u32 *len)
{
(void)attr;
(void)type;
(void)len;
return 0;
}
char *
image_type_to_string (byte type, int string)
{
(void)type;
(void)string;
return NULL;
}
#ifdef ENABLE_CARD_SUPPORT
int
agent_scd_getattr (const char *name, struct agent_card_info_s *info)
{
(void)name;
(void)info;
return 0;
}
#endif /* ENABLE_CARD_SUPPORT */
/* We do not do any locking, so use these stubs here */
void
dotlock_disable (void)
{
}
dotlock_t
dotlock_create (const char *file_to_lock, unsigned int flags)
{
(void)file_to_lock;
(void)flags;
return NULL;
}
void
dotlock_destroy (dotlock_t h)
{
(void)h;
}
int
dotlock_take (dotlock_t h, long timeout)
{
(void)h;
(void)timeout;
return 0;
}
int
dotlock_release (dotlock_t h)
{
(void)h;
return 0;
}
void
dotlock_remove_lockfiles (void)
{
}
int
agent_probe_secret_key (ctrl_t ctrl, PKT_public_key *pk)
{
(void)ctrl;
(void)pk;
return 0;
}
gpg_error_t
agent_probe_any_secret_key (ctrl_t ctrl, kbnode_t keyblock)
{
(void)ctrl;
(void)keyblock;
return gpg_error (GPG_ERR_NO_SECKEY);
}
gpg_error_t
agent_get_keyinfo (ctrl_t ctrl, const char *hexkeygrip,
char **r_serialno, int *r_cleartext)
{
(void)ctrl;
(void)hexkeygrip;
(void)r_cleartext;
*r_serialno = NULL;
return gpg_error (GPG_ERR_NO_SECKEY);
}
gpg_error_t
gpg_dirmngr_get_pka (ctrl_t ctrl, const char *userid,
unsigned char **r_fpr, size_t *r_fprlen,
char **r_url)
{
(void)ctrl;
(void)userid;
if (r_fpr)
*r_fpr = NULL;
if (r_fprlen)
*r_fprlen = 0;
if (r_url)
*r_url = NULL;
return gpg_error (GPG_ERR_NOT_FOUND);
}
gpg_error_t
export_pubkey_buffer (ctrl_t ctrl, const char *keyspec, unsigned int options,
const void *prefix, size_t prefixlen,
export_stats_t stats,
kbnode_t *r_keyblock, void **r_data, size_t *r_datalen)
{
(void)ctrl;
(void)keyspec;
(void)options;
(void)prefix;
(void)prefixlen;
(void)stats;
*r_keyblock = NULL;
*r_data = NULL;
*r_datalen = 0;
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
}
gpg_error_t
tofu_write_tfs_record (ctrl_t ctrl, estream_t fp,
PKT_public_key *pk, const char *user_id)
{
(void)ctrl;
(void)fp;
(void)pk;
(void)user_id;
return gpg_error (GPG_ERR_GENERAL);
}
gpg_error_t
tofu_get_policy (ctrl_t ctrl, PKT_public_key *pk, PKT_user_id *user_id,
enum tofu_policy *policy)
{
(void)ctrl;
(void)pk;
(void)user_id;
(void)policy;
return gpg_error (GPG_ERR_GENERAL);
}
const char *
tofu_policy_str (enum tofu_policy policy)
{
(void)policy;
return "unknown";
}
void
tofu_begin_batch_update (ctrl_t ctrl)
{
(void)ctrl;
}
void
tofu_end_batch_update (ctrl_t ctrl)
{
(void)ctrl;
}
gpg_error_t
tofu_notice_key_changed (ctrl_t ctrl, kbnode_t kb)
{
(void) ctrl;
(void) kb;
return 0;
}
int
get_revocation_reason (PKT_signature *sig, char **r_reason,
char **r_comment, size_t *r_commentlen)
{
(void)sig;
(void)r_commentlen;
if (r_reason)
*r_reason = NULL;
if (r_comment)
*r_comment = NULL;
return 0;
}