mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-22 10:19:57 +01:00
3cbc66410d
* g10/trustdb.c (tdb_register_trusted_keyid): Make static. (tdb_register_trusted_key): Replace register_trusted_keyid by tdb_register_trusted_key. * g10/keygen.c (do_generate_keypair): Ditto. * g10/trust.c (register_trusted_keyid): Remove.
429 lines
11 KiB
C
429 lines
11 KiB
C
/* trust.c - High level trust functions
|
||
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
|
||
* 2008, 2012 Free Software Foundation, Inc.
|
||
* Copyright (C) 2014 Werner Koch
|
||
*
|
||
* 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 <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
|
||
#include "gpg.h"
|
||
#include "keydb.h"
|
||
#include "../common/util.h"
|
||
#include "options.h"
|
||
#include "packet.h"
|
||
#include "main.h"
|
||
#include "../common/i18n.h"
|
||
#include "trustdb.h"
|
||
#include "../common/host2net.h"
|
||
|
||
|
||
/* Return true if key is disabled. Note that this is usually used via
|
||
the pk_is_disabled macro. */
|
||
int
|
||
cache_disabled_value (ctrl_t ctrl, PKT_public_key *pk)
|
||
{
|
||
#ifdef NO_TRUST_MODELS
|
||
(void)pk;
|
||
return 0;
|
||
#else
|
||
return tdb_cache_disabled_value (ctrl, pk);
|
||
#endif
|
||
}
|
||
|
||
|
||
void
|
||
register_trusted_key (const char *string)
|
||
{
|
||
#ifdef NO_TRUST_MODELS
|
||
(void)string;
|
||
#else
|
||
|
||
/* Some users have conf files with entries like
|
||
* trusted-key 0x1234567812345678 # foo
|
||
* That is obviously wrong. Before fixing bug#1206 trailing garbage
|
||
* on a key specification if was ignored. We detect the above use case
|
||
* here and cut off the junk-looking-like-a comment. */
|
||
if (strchr (string, '#'))
|
||
{
|
||
char *buf;
|
||
|
||
buf = xtrystrdup (string);
|
||
if (buf)
|
||
{
|
||
*strchr (buf, '#') = 0;
|
||
tdb_register_trusted_key (buf);
|
||
xfree (buf);
|
||
return;
|
||
}
|
||
}
|
||
|
||
tdb_register_trusted_key (string);
|
||
#endif
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
* This function returns a letter for a trust value. Trust flags
|
||
* are ignored.
|
||
*/
|
||
static int
|
||
trust_letter (unsigned int value)
|
||
{
|
||
switch( (value & TRUST_MASK) )
|
||
{
|
||
case TRUST_UNKNOWN: return '-';
|
||
case TRUST_EXPIRED: return 'e';
|
||
case TRUST_UNDEFINED: return 'q';
|
||
case TRUST_NEVER: return 'n';
|
||
case TRUST_MARGINAL: return 'm';
|
||
case TRUST_FULLY: return 'f';
|
||
case TRUST_ULTIMATE: return 'u';
|
||
default: return '?';
|
||
}
|
||
}
|
||
|
||
|
||
/* The strings here are similar to those in
|
||
pkclist.c:do_edit_ownertrust() */
|
||
const char *
|
||
trust_value_to_string (unsigned int value)
|
||
{
|
||
switch ((value & TRUST_MASK))
|
||
{
|
||
case TRUST_UNKNOWN: return _("unknown");
|
||
case TRUST_EXPIRED: return _("expired");
|
||
case TRUST_UNDEFINED: return _("undefined");
|
||
case TRUST_NEVER: return _("never");
|
||
case TRUST_MARGINAL: return _("marginal");
|
||
case TRUST_FULLY: return _("full");
|
||
case TRUST_ULTIMATE: return _("ultimate");
|
||
default: return "err";
|
||
}
|
||
}
|
||
|
||
|
||
int
|
||
string_to_trust_value (const char *str)
|
||
{
|
||
if (!ascii_strcasecmp (str, "undefined"))
|
||
return TRUST_UNDEFINED;
|
||
else if (!ascii_strcasecmp (str, "never"))
|
||
return TRUST_NEVER;
|
||
else if (!ascii_strcasecmp (str, "marginal"))
|
||
return TRUST_MARGINAL;
|
||
else if (!ascii_strcasecmp (str, "full"))
|
||
return TRUST_FULLY;
|
||
else if (!ascii_strcasecmp(str, "ultimate"))
|
||
return TRUST_ULTIMATE;
|
||
else
|
||
return -1;
|
||
}
|
||
|
||
|
||
const char *
|
||
uid_trust_string_fixed (ctrl_t ctrl, PKT_public_key *key, PKT_user_id *uid)
|
||
{
|
||
if (!key && !uid)
|
||
{
|
||
/* TRANSLATORS: these strings are similar to those in
|
||
trust_value_to_string(), but are a fixed length. This is needed to
|
||
make attractive information listings where columns line up
|
||
properly. The value "10" should be the length of the strings you
|
||
choose to translate to. This is the length in printable columns.
|
||
It gets passed to atoi() so everything after the number is
|
||
essentially a comment and need not be translated. Either key and
|
||
uid are both NULL, or neither are NULL. */
|
||
return _("10 translator see trust.c:uid_trust_string_fixed");
|
||
}
|
||
else if(uid->flags.revoked || (key && key->flags.revoked))
|
||
return _("[ revoked]");
|
||
else if(uid->flags.expired)
|
||
return _("[ expired]");
|
||
else if(key)
|
||
{
|
||
switch (get_validity (ctrl, NULL, key, uid, NULL, 0) & TRUST_MASK)
|
||
{
|
||
case TRUST_UNKNOWN: return _("[ unknown]");
|
||
case TRUST_EXPIRED: return _("[ expired]");
|
||
case TRUST_UNDEFINED: return _("[ undef ]");
|
||
case TRUST_NEVER: return _("[ never ]");
|
||
case TRUST_MARGINAL: return _("[marginal]");
|
||
case TRUST_FULLY: return _("[ full ]");
|
||
case TRUST_ULTIMATE: return _("[ultimate]");
|
||
}
|
||
}
|
||
|
||
return "err";
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
* Return the assigned ownertrust value for the given public key.
|
||
* The key should be the primary key.
|
||
*/
|
||
unsigned int
|
||
get_ownertrust (ctrl_t ctrl, PKT_public_key *pk)
|
||
{
|
||
#ifdef NO_TRUST_MODELS
|
||
(void)pk;
|
||
return TRUST_UNKNOWN;
|
||
#else
|
||
return tdb_get_ownertrust (ctrl, pk, 0);
|
||
#endif
|
||
}
|
||
|
||
|
||
/*
|
||
* Same as get_ownertrust but this takes the minimum ownertrust value
|
||
* into account, and will bump up the value as needed. NO_CREATE
|
||
* inhibits creation of a trustdb it that does not yet exists.
|
||
*/
|
||
static int
|
||
get_ownertrust_with_min (ctrl_t ctrl, PKT_public_key *pk, int no_create)
|
||
{
|
||
#ifdef NO_TRUST_MODELS
|
||
(void)pk;
|
||
return TRUST_UNKNOWN;
|
||
#else
|
||
unsigned int otrust, otrust_min;
|
||
|
||
/* Shortcut instead of doing the same twice in the two tdb_get
|
||
* functions: If the caller asked not to create a trustdb we call
|
||
* init_trustdb directly and allow it to fail with an error code for
|
||
* a non-existing trustdb. */
|
||
if (no_create && init_trustdb (ctrl, 1))
|
||
return TRUST_UNKNOWN;
|
||
|
||
otrust = (tdb_get_ownertrust (ctrl, pk, no_create) & TRUST_MASK);
|
||
otrust_min = tdb_get_min_ownertrust (ctrl, pk, no_create);
|
||
if (otrust < otrust_min)
|
||
{
|
||
/* If the trust that the user has set is less than the trust
|
||
that was calculated from a trust signature chain, use the
|
||
higher of the two. We do this here and not in
|
||
get_ownertrust since the underlying ownertrust should not
|
||
really be set - just the appearance of the ownertrust. */
|
||
|
||
otrust = otrust_min;
|
||
}
|
||
|
||
return otrust;
|
||
#endif
|
||
}
|
||
|
||
|
||
/*
|
||
* Same as get_ownertrust but return a trust letter instead of an
|
||
* value. This takes the minimum ownertrust value into account. If
|
||
* NO_CREATE is set, no efforts for creating a trustdb will be taken.
|
||
*/
|
||
int
|
||
get_ownertrust_info (ctrl_t ctrl, PKT_public_key *pk, int no_create)
|
||
{
|
||
return trust_letter (get_ownertrust_with_min (ctrl, pk, no_create));
|
||
}
|
||
|
||
|
||
/*
|
||
* Same as get_ownertrust but return a trust string instead of an
|
||
* value. This takes the minimum ownertrust value into account. If
|
||
* NO_CREATE is set, no efforts for creating a trustdb will be taken.
|
||
*/
|
||
const char *
|
||
get_ownertrust_string (ctrl_t ctrl, PKT_public_key *pk, int no_create)
|
||
{
|
||
return trust_value_to_string (get_ownertrust_with_min (ctrl, pk, no_create));
|
||
}
|
||
|
||
|
||
/*
|
||
* Set the trust value of the given public key to the new value.
|
||
* The key should be a primary one.
|
||
*/
|
||
void
|
||
update_ownertrust (ctrl_t ctrl, PKT_public_key *pk, unsigned int new_trust)
|
||
{
|
||
#ifdef NO_TRUST_MODELS
|
||
(void)pk;
|
||
(void)new_trust;
|
||
#else
|
||
tdb_update_ownertrust (ctrl, pk, new_trust);
|
||
#endif
|
||
}
|
||
|
||
|
||
int
|
||
clear_ownertrusts (ctrl_t ctrl, PKT_public_key *pk)
|
||
{
|
||
#ifdef NO_TRUST_MODELS
|
||
(void)pk;
|
||
return 0;
|
||
#else
|
||
return tdb_clear_ownertrusts (ctrl, pk);
|
||
#endif
|
||
}
|
||
|
||
|
||
void
|
||
revalidation_mark (ctrl_t ctrl)
|
||
{
|
||
#ifndef NO_TRUST_MODELS
|
||
tdb_revalidation_mark (ctrl);
|
||
#endif
|
||
}
|
||
|
||
|
||
void
|
||
check_trustdb_stale (ctrl_t ctrl)
|
||
{
|
||
#ifndef NO_TRUST_MODELS
|
||
tdb_check_trustdb_stale (ctrl);
|
||
#else
|
||
(void)ctrl;
|
||
#endif
|
||
}
|
||
|
||
|
||
void
|
||
check_or_update_trustdb (ctrl_t ctrl)
|
||
{
|
||
#ifndef NO_TRUST_MODELS
|
||
tdb_check_or_update (ctrl);
|
||
#else
|
||
(void)ctrl;
|
||
#endif
|
||
}
|
||
|
||
|
||
/*
|
||
* Return the validity information for KB/PK (at least one must be
|
||
* non-NULL). If the namehash is not NULL, the validity of the
|
||
* corresponding user ID is returned, otherwise, a reasonable value
|
||
* for the entire key is returned.
|
||
*/
|
||
unsigned int
|
||
get_validity (ctrl_t ctrl, kbnode_t kb, PKT_public_key *pk, PKT_user_id *uid,
|
||
PKT_signature *sig, int may_ask)
|
||
{
|
||
int rc;
|
||
unsigned int validity;
|
||
u32 kid[2];
|
||
PKT_public_key *main_pk;
|
||
|
||
if (kb && pk)
|
||
log_assert (keyid_cmp (pk_main_keyid (pk),
|
||
pk_main_keyid (kb->pkt->pkt.public_key)) == 0);
|
||
|
||
if (! pk)
|
||
{
|
||
log_assert (kb);
|
||
pk = kb->pkt->pkt.public_key;
|
||
}
|
||
|
||
if (uid)
|
||
namehash_from_uid (uid);
|
||
|
||
keyid_from_pk (pk, kid);
|
||
if (pk->main_keyid[0] != kid[0] || pk->main_keyid[1] != kid[1])
|
||
{
|
||
/* This is a subkey - get the mainkey. */
|
||
if (kb)
|
||
main_pk = kb->pkt->pkt.public_key;
|
||
else
|
||
{
|
||
main_pk = xmalloc_clear (sizeof *main_pk);
|
||
rc = get_pubkey (ctrl, main_pk, pk->main_keyid);
|
||
if (rc)
|
||
{
|
||
char *tempkeystr = xstrdup (keystr (pk->main_keyid));
|
||
log_error ("error getting main key %s of subkey %s: %s\n",
|
||
tempkeystr, keystr (kid), gpg_strerror (rc));
|
||
xfree (tempkeystr);
|
||
validity = TRUST_UNKNOWN;
|
||
goto leave;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
main_pk = pk;
|
||
|
||
#ifdef NO_TRUST_MODELS
|
||
validity = TRUST_UNKNOWN;
|
||
#else
|
||
validity = tdb_get_validity_core (ctrl, kb, pk, uid, main_pk, sig, may_ask);
|
||
#endif
|
||
|
||
leave:
|
||
/* Set some flags direct from the key */
|
||
if (main_pk->flags.revoked)
|
||
validity |= TRUST_FLAG_REVOKED;
|
||
if (main_pk != pk && pk->flags.revoked)
|
||
validity |= TRUST_FLAG_SUB_REVOKED;
|
||
/* Note: expiration is a trust value and not a flag - don't know why
|
||
* I initially designed it that way. */
|
||
if (main_pk->has_expired || pk->has_expired)
|
||
validity = ((validity & (~TRUST_MASK | TRUST_FLAG_PENDING_CHECK))
|
||
| TRUST_EXPIRED);
|
||
|
||
if (main_pk != pk && !kb)
|
||
free_public_key (main_pk);
|
||
return validity;
|
||
}
|
||
|
||
|
||
int
|
||
get_validity_info (ctrl_t ctrl, kbnode_t kb, PKT_public_key *pk,
|
||
PKT_user_id *uid)
|
||
{
|
||
int trustlevel;
|
||
|
||
if (kb && pk)
|
||
log_assert (keyid_cmp (pk_main_keyid (pk),
|
||
pk_main_keyid (kb->pkt->pkt.public_key)) == 0);
|
||
|
||
if (! pk && kb)
|
||
pk = kb->pkt->pkt.public_key;
|
||
if (!pk)
|
||
return '?'; /* Just in case a NULL PK is passed. */
|
||
|
||
trustlevel = get_validity (ctrl, kb, pk, uid, NULL, 0);
|
||
if ((trustlevel & TRUST_FLAG_REVOKED))
|
||
return 'r';
|
||
return trust_letter (trustlevel);
|
||
}
|
||
|
||
|
||
const char *
|
||
get_validity_string (ctrl_t ctrl, PKT_public_key *pk, PKT_user_id *uid)
|
||
{
|
||
int trustlevel;
|
||
|
||
if (!pk)
|
||
return "err"; /* Just in case a NULL PK is passed. */
|
||
|
||
trustlevel = get_validity (ctrl, NULL, pk, uid, NULL, 0);
|
||
if ((trustlevel & TRUST_FLAG_REVOKED))
|
||
return _("revoked");
|
||
return trust_value_to_string (trustlevel);
|
||
}
|