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|
/* keylist.c - Listing keys.
Copyright (C) 2000 Werner Koch (dd9jn)
Copyright (C) 2001, 2002, 2003, 2004, 2006 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include "gpgme.h"
#include "util.h"
#include "context.h"
#include "ops.h"
#include "debug.h"
struct key_queue_item_s
{
struct key_queue_item_s *next;
gpgme_key_t key;
};
typedef struct
{
struct _gpgme_op_keylist_result result;
gpgme_key_t tmp_key;
/* This points to the last uid in tmp_key. */
gpgme_user_id_t tmp_uid;
/* This points to the last sig in tmp_uid. */
gpgme_key_sig_t tmp_keysig;
/* Something new is available. */
int key_cond;
struct key_queue_item_s *key_queue;
} *op_data_t;
static void
release_op_data (void *hook)
{
op_data_t opd = (op_data_t) hook;
struct key_queue_item_s *key = opd->key_queue;
if (opd->tmp_key)
gpgme_key_unref (opd->tmp_key);
/* opd->tmp_uid and opd->tmp_keysig are actually part of opd->tmp_key,
so we do not need to release them here. */
while (key)
{
struct key_queue_item_s *next = key->next;
gpgme_key_unref (key->key);
key = next;
}
}
gpgme_keylist_result_t
gpgme_op_keylist_result (gpgme_ctx_t ctx)
{
void *hook;
op_data_t opd;
gpgme_error_t err;
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYLIST, &hook, -1, NULL);
opd = hook;
if (err || !opd)
return NULL;
return &opd->result;
}
static gpgme_error_t
keylist_status_handler (void *priv, gpgme_status_code_t code, char *args)
{
gpgme_ctx_t ctx = (gpgme_ctx_t) priv;
gpgme_error_t err;
void *hook;
op_data_t opd;
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYLIST, &hook, -1, NULL);
opd = hook;
if (err)
return err;
switch (code)
{
case GPGME_STATUS_TRUNCATED:
opd->result.truncated = 1;
break;
default:
break;
}
return 0;
}
static void
set_subkey_trust_info (gpgme_subkey_t subkey, const char *src)
{
while (*src && !isdigit (*src))
{
switch (*src)
{
case 'e':
subkey->expired = 1;
break;
case 'r':
subkey->revoked = 1;
break;
case 'd':
/* Note that gpg 1.3 won't print that anymore but only uses
the capabilities field. */
subkey->disabled = 1;
break;
case 'i':
subkey->invalid = 1;
break;
}
src++;
}
}
static void
set_mainkey_trust_info (gpgme_key_t key, const char *src)
{
/* First set the trust info of the main key (the first subkey). */
set_subkey_trust_info (key->subkeys, src);
/* Now set the summarized trust info. */
while (*src && !isdigit (*src))
{
switch (*src)
{
case 'e':
key->expired = 1;
break;
case 'r':
key->revoked = 1;
break;
case 'd':
/* Note that gpg 1.3 won't print that anymore but only uses
the capabilities field. However, it is still used for
external key listings. */
key->disabled = 1;
break;
case 'i':
key->invalid = 1;
break;
}
src++;
}
}
static void
set_userid_flags (gpgme_key_t key, const char *src)
{
gpgme_user_id_t uid = key->_last_uid;
assert (uid);
/* Look at letters and stop at the first digit. */
while (*src && !isdigit (*src))
{
switch (*src)
{
case 'r':
uid->revoked = 1;
break;
case 'i':
uid->invalid = 1;
break;
case 'n':
uid->validity = GPGME_VALIDITY_NEVER;
break;
case 'm':
uid->validity = GPGME_VALIDITY_MARGINAL;
break;
case 'f':
uid->validity = GPGME_VALIDITY_FULL;
break;
case 'u':
uid->validity = GPGME_VALIDITY_ULTIMATE;
break;
}
src++;
}
}
static void
set_subkey_capability (gpgme_subkey_t subkey, const char *src)
{
while (*src)
{
switch (*src)
{
case 'e':
subkey->can_encrypt = 1;
break;
case 's':
subkey->can_sign = 1;
break;
case 'c':
subkey->can_certify = 1;
break;
case 'a':
subkey->can_authenticate = 1;
break;
case 'q':
subkey->is_qualified = 1;
break;
case 'd':
subkey->disabled = 1;
break;
}
src++;
}
}
static void
set_mainkey_capability (gpgme_key_t key, const char *src)
{
/* First set the capabilities of the main key (the first subkey). */
set_subkey_capability (key->subkeys, src);
while (*src)
{
switch (*src)
{
case 'd':
case 'D':
/* Note, that this flag is also set using the key validity
field for backward compatibility with gpg 1.2. We use d
and D, so that a future gpg version will be able to
disable certain subkeys. Currently it is expected that
gpg sets this for the primary key. */
key->disabled = 1;
break;
case 'e':
case 'E':
key->can_encrypt = 1;
break;
case 's':
case 'S':
key->can_sign = 1;
break;
case 'c':
case 'C':
key->can_certify = 1;
break;
case 'a':
case 'A':
key->can_authenticate = 1;
break;
case 'q':
case 'Q':
key->is_qualified = 1;
break;
}
src++;
}
}
static void
set_ownertrust (gpgme_key_t key, const char *src)
{
/* Look at letters and stop at the first digit. */
while (*src && !isdigit (*src))
{
switch (*src)
{
case 'n':
key->owner_trust = GPGME_VALIDITY_NEVER;
break;
case 'm':
key->owner_trust = GPGME_VALIDITY_MARGINAL;
break;
case 'f':
key->owner_trust = GPGME_VALIDITY_FULL;
break;
case 'u':
key->owner_trust = GPGME_VALIDITY_ULTIMATE;
break;
default:
key->owner_trust = GPGME_VALIDITY_UNKNOWN;
break;
}
src++;
}
}
/* We have read an entire key into tmp_key and should now finish it.
It is assumed that this releases tmp_key. */
static void
finish_key (gpgme_ctx_t ctx, op_data_t opd)
{
gpgme_key_t key = opd->tmp_key;
opd->tmp_key = NULL;
opd->tmp_uid = NULL;
opd->tmp_keysig = NULL;
if (key)
_gpgme_engine_io_event (ctx->engine, GPGME_EVENT_NEXT_KEY, key);
}
/* Note: We are allowed to modify LINE. */
static gpgme_error_t
keylist_colon_handler (void *priv, char *line)
{
gpgme_ctx_t ctx = (gpgme_ctx_t) priv;
enum
{
RT_NONE, RT_SIG, RT_UID, RT_SUB, RT_PUB, RT_FPR,
RT_SSB, RT_SEC, RT_CRT, RT_CRS, RT_REV, RT_SPK
}
rectype = RT_NONE;
#define NR_FIELDS 16
char *field[NR_FIELDS];
int fields = 0;
void *hook;
op_data_t opd;
gpgme_error_t err;
gpgme_key_t key;
gpgme_subkey_t subkey = NULL;
gpgme_key_sig_t keysig = NULL;
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYLIST, &hook, -1, NULL);
opd = hook;
if (err)
return err;
key = opd->tmp_key;
DEBUG3 ("keylist_colon_handler ctx = %p, key = %p, line = %s\n",
ctx, key, line ? line : "(null)");
if (!line)
{
/* End Of File. */
finish_key (ctx, opd);
return 0;
}
while (line && fields < NR_FIELDS)
{
field[fields++] = line;
line = strchr (line, ':');
if (line)
*(line++) = '\0';
}
if (!strcmp (field[0], "sig"))
rectype = RT_SIG;
else if (!strcmp (field[0], "rev"))
rectype = RT_REV;
else if (!strcmp (field[0], "pub"))
rectype = RT_PUB;
else if (!strcmp (field[0], "sec"))
rectype = RT_SEC;
else if (!strcmp (field[0], "crt"))
rectype = RT_CRT;
else if (!strcmp (field[0], "crs"))
rectype = RT_CRS;
else if (!strcmp (field[0], "fpr") && key)
rectype = RT_FPR;
else if (!strcmp (field[0], "uid") && key)
rectype = RT_UID;
else if (!strcmp (field[0], "sub") && key)
rectype = RT_SUB;
else if (!strcmp (field[0], "ssb") && key)
rectype = RT_SSB;
else if (!strcmp (field[0], "spk") && key)
rectype = RT_SPK;
else
rectype = RT_NONE;
/* Only look at signatures immediately following a user ID. For
this, clear the user ID pointer when encountering anything but a
signature. */
if (rectype != RT_SIG && rectype != RT_REV)
opd->tmp_uid = NULL;
/* Only look at subpackets immediately following a signature. For
this, clear the signature pointer when encountering anything but
a subpacket. */
if (rectype != RT_SPK)
opd->tmp_keysig = NULL;
switch (rectype)
{
case RT_PUB:
case RT_SEC:
case RT_CRT:
case RT_CRS:
/* Start a new keyblock. */
err = _gpgme_key_new (&key);
if (err)
return err;
key->keylist_mode = ctx->keylist_mode;
err = _gpgme_key_add_subkey (key, &subkey);
if (err)
{
gpgme_key_unref (key);
return err;
}
if (rectype == RT_SEC || rectype == RT_CRS)
key->secret = subkey->secret = 1;
if (rectype == RT_CRT || rectype == RT_CRS)
key->protocol = GPGME_PROTOCOL_CMS;
finish_key (ctx, opd);
opd->tmp_key = key;
/* Field 2 has the trust info. */
if (fields >= 2)
set_mainkey_trust_info (key, field[1]);
/* Field 3 has the key length. */
if (fields >= 3)
{
int i = atoi (field[2]);
/* Ignore invalid values. */
if (i > 1)
subkey->length = i;
}
/* Field 4 has the public key algorithm. */
if (fields >= 4)
{
int i = atoi (field[3]);
if (i >= 1 && i < 128)
subkey->pubkey_algo = i;
}
/* Field 5 has the long keyid. Allow short key IDs for the
output of an external keyserver listing. */
if (fields >= 5 && strlen (field[4]) <= DIM(subkey->_keyid) - 1)
strcpy (subkey->_keyid, field[4]);
/* Field 6 has the timestamp (seconds). */
if (fields >= 6)
subkey->timestamp = _gpgme_parse_timestamp (field[5], NULL);
/* Field 7 has the expiration time (seconds). */
if (fields >= 7)
subkey->expires = _gpgme_parse_timestamp (field[6], NULL);
/* Field 8 has the X.509 serial number. */
if (fields >= 8 && (rectype == RT_CRT || rectype == RT_CRS))
{
key->issuer_serial = strdup (field[7]);
if (!key->issuer_serial)
return gpg_error_from_errno (errno);
}
/* Field 9 has the ownertrust. */
if (fields >= 9)
set_ownertrust (key, field[8]);
/* Field 10 is not used for gpg due to --fixed-list-mode option
but GPGSM stores the issuer name. */
if (fields >= 10 && (rectype == RT_CRT || rectype == RT_CRS))
if (_gpgme_decode_c_string (field[9], &key->issuer_name, 0))
return gpg_error (GPG_ERR_ENOMEM); /* FIXME */
/* Field 11 has the signature class. */
/* Field 12 has the capabilities. */
if (fields >= 12)
set_mainkey_capability (key, field[11]);
/* Field 15 carries special flags of a secret key. We reset the
SECRET flag of a subkey here if the key is actually only a
stub. The SECRET flag of the key will be true even then. */
if (fields >= 15 && key->secret)
if (*field[14] == '#')
subkey->secret = 0;
break;
case RT_SUB:
case RT_SSB:
/* Start a new subkey. */
err = _gpgme_key_add_subkey (key, &subkey);
if (err)
return err;
if (rectype == RT_SSB)
subkey->secret = 1;
/* Field 2 has the trust info. */
if (fields >= 2)
set_subkey_trust_info (subkey, field[1]);
/* Field 3 has the key length. */
if (fields >= 3)
{
int i = atoi (field[2]);
/* Ignore invalid values. */
if (i > 1)
subkey->length = i;
}
/* Field 4 has the public key algorithm. */
if (fields >= 4)
{
int i = atoi (field[3]);
if (i >= 1 && i < 128)
subkey->pubkey_algo = i;
}
/* Field 5 has the long keyid. */
if (fields >= 5 && strlen (field[4]) == DIM(subkey->_keyid) - 1)
strcpy (subkey->_keyid, field[4]);
/* Field 6 has the timestamp (seconds). */
if (fields >= 6)
subkey->timestamp = _gpgme_parse_timestamp (field[5], NULL);
/* Field 7 has the expiration time (seconds). */
if (fields >= 7)
subkey->expires = _gpgme_parse_timestamp (field[6], NULL);
/* Field 8 is reserved (LID). */
/* Field 9 has the ownertrust. */
/* Field 10, the user ID, is n/a for a subkey. */
/* Field 11 has the signature class. */
/* Field 12 has the capabilities. */
if (fields >= 12)
set_subkey_capability (subkey, field[11]);
/* Field 15 carries special flags of a secret key. */
if (fields >= 15 && key->secret)
if (*field[14] == '#')
subkey->secret = 0;
break;
case RT_UID:
/* Field 2 has the trust info, and field 10 has the user ID. */
if (fields >= 10)
{
if (_gpgme_key_append_name (key, field[9]))
return gpg_error_from_errno (GPG_ERR_ENOMEM); /* FIXME */
else
{
if (field[1])
set_userid_flags (key, field[1]);
opd->tmp_uid = key->_last_uid;
}
}
break;
case RT_FPR:
/* Field 10 has the fingerprint (take only the first one). */
if (fields >= 10 && field[9] && *field[9])
{
/* Need to apply it to the last subkey because all subkeys
do have fingerprints. */
subkey = key->_last_subkey;
if (!subkey->fpr)
{
subkey->fpr = strdup (field[9]);
if (!subkey->fpr)
return gpg_error_from_errno (errno);
}
}
/* Field 13 has the gpgsm chain ID (take only the first one). */
if (fields >= 13 && !key->chain_id && *field[12])
{
key->chain_id = strdup (field[12]);
if (!key->chain_id)
return gpg_error_from_errno (errno);
}
break;
case RT_SIG:
case RT_REV:
if (!opd->tmp_uid)
return 0;
/* Start a new (revoked) signature. */
assert (opd->tmp_uid == key->_last_uid);
keysig = _gpgme_key_add_sig (key, (fields >= 10) ? field[9] : NULL);
if (!keysig)
return gpg_error (GPG_ERR_ENOMEM); /* FIXME */
/* Field 2 has the calculated trust ('!', '-', '?', '%'). */
if (fields >= 2)
switch (field[1][0])
{
case '!':
keysig->status = gpg_error (GPG_ERR_NO_ERROR);
break;
case '-':
keysig->status = gpg_error (GPG_ERR_BAD_SIGNATURE);
break;
case '?':
keysig->status = gpg_error (GPG_ERR_NO_PUBKEY);
break;
case '%':
keysig->status = gpg_error (GPG_ERR_GENERAL);
break;
default:
keysig->status = gpg_error (GPG_ERR_NO_ERROR);
break;
}
/* Field 4 has the public key algorithm. */
if (fields >= 4)
{
int i = atoi (field[3]);
if (i >= 1 && i < 128)
keysig->pubkey_algo = i;
}
/* Field 5 has the long keyid. */
if (fields >= 5 && strlen (field[4]) == DIM(keysig->_keyid) - 1)
strcpy (keysig->_keyid, field[4]);
/* Field 6 has the timestamp (seconds). */
if (fields >= 6)
keysig->timestamp = _gpgme_parse_timestamp (field[5], NULL);
/* Field 7 has the expiration time (seconds). */
if (fields >= 7)
keysig->expires = _gpgme_parse_timestamp (field[6], NULL);
/* Field 11 has the signature class (eg, 0x30 means revoked). */
if (fields >= 11)
if (field[10][0] && field[10][1])
{
int sig_class = _gpgme_hextobyte (field[10]);
if (sig_class >= 0)
{
keysig->sig_class = sig_class;
keysig->class = keysig->sig_class;
if (sig_class == 0x30)
keysig->revoked = 1;
}
if (field[10][2] == 'x')
keysig->exportable = 1;
}
opd->tmp_keysig = keysig;
break;
case RT_SPK:
if (!opd->tmp_keysig)
return 0;
assert (opd->tmp_keysig == key->_last_uid->_last_keysig);
if (fields >= 4)
{
/* Field 2 has the subpacket type. */
int type = atoi (field[1]);
/* Field 3 has the flags. */
int flags = atoi (field[2]);
/* Field 4 has the length. */
int len = atoi (field[3]);
/* Field 5 has the data. */
char *data = field[4];
/* Type 20: Notation data. */
/* Type 26: Policy URL. */
if (type == 20 || type == 26)
{
gpgme_sig_notation_t notation;
keysig = opd->tmp_keysig;
/* At this time, any error is serious. */
err = _gpgme_parse_notation (¬ation, type, flags, len, data);
if (err)
return err;
/* Add a new notation. FIXME: Could be factored out. */
if (!keysig->notations)
keysig->notations = notation;
if (keysig->_last_notation)
keysig->_last_notation->next = notation;
keysig->_last_notation = notation;
}
}
case RT_NONE:
/* Unknown record. */
break;
}
return 0;
}
void
_gpgme_op_keylist_event_cb (void *data, gpgme_event_io_t type, void *type_data)
{
gpgme_error_t err;
gpgme_ctx_t ctx = (gpgme_ctx_t) data;
gpgme_key_t key = (gpgme_key_t) type_data;
void *hook;
op_data_t opd;
struct key_queue_item_s *q, *q2;
assert (type == GPGME_EVENT_NEXT_KEY);
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYLIST, &hook, -1, NULL);
opd = hook;
if (err)
return;
q = malloc (sizeof *q);
if (!q)
{
gpgme_key_unref (key);
/* FIXME return GPGME_Out_Of_Core; */
return;
}
q->key = key;
q->next = NULL;
/* FIXME: Use a tail pointer? */
if (!(q2 = opd->key_queue))
opd->key_queue = q;
else
{
for (; q2->next; q2 = q2->next)
;
q2->next = q;
}
opd->key_cond = 1;
}
/* Start a keylist operation within CTX, searching for keys which
match PATTERN. If SECRET_ONLY is true, only secret keys are
returned. */
gpgme_error_t
gpgme_op_keylist_start (gpgme_ctx_t ctx, const char *pattern, int secret_only)
{
gpgme_error_t err;
void *hook;
op_data_t opd;
err = _gpgme_op_reset (ctx, 2);
if (err)
return err;
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYLIST, &hook,
sizeof (*opd), release_op_data);
opd = hook;
if (err)
return err;
_gpgme_engine_set_status_handler (ctx->engine, keylist_status_handler, ctx);
err = _gpgme_engine_set_colon_line_handler (ctx->engine,
keylist_colon_handler, ctx);
if (err)
return err;
return _gpgme_engine_op_keylist (ctx->engine, pattern, secret_only,
ctx->keylist_mode);
}
/* Start a keylist operation within CTX, searching for keys which
match PATTERN. If SECRET_ONLY is true, only secret keys are
returned. */
gpgme_error_t
gpgme_op_keylist_ext_start (gpgme_ctx_t ctx, const char *pattern[],
int secret_only, int reserved)
{
gpgme_error_t err;
void *hook;
op_data_t opd;
err = _gpgme_op_reset (ctx, 2);
if (err)
return err;
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYLIST, &hook,
sizeof (*opd), release_op_data);
opd = hook;
if (err)
return err;
_gpgme_engine_set_status_handler (ctx->engine, keylist_status_handler, ctx);
err = _gpgme_engine_set_colon_line_handler (ctx->engine,
keylist_colon_handler, ctx);
if (err)
return err;
return _gpgme_engine_op_keylist_ext (ctx->engine, pattern, secret_only,
reserved, ctx->keylist_mode);
}
/* Return the next key from the keylist in R_KEY. */
gpgme_error_t
gpgme_op_keylist_next (gpgme_ctx_t ctx, gpgme_key_t *r_key)
{
gpgme_error_t err;
struct key_queue_item_s *queue_item;
void *hook;
op_data_t opd;
if (!ctx || !r_key)
return gpg_error (GPG_ERR_INV_VALUE);
*r_key = NULL;
if (!ctx)
return gpg_error (GPG_ERR_INV_VALUE);
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYLIST, &hook, -1, NULL);
opd = hook;
if (err)
return err;
if (opd == NULL)
return gpg_error (GPG_ERR_INV_VALUE);
if (!opd->key_queue)
{
err = _gpgme_wait_on_condition (ctx, &opd->key_cond);
if (err)
return err;
if (!opd->key_cond)
return gpg_error (GPG_ERR_EOF);
opd->key_cond = 0;
assert (opd->key_queue);
}
queue_item = opd->key_queue;
opd->key_queue = queue_item->next;
if (!opd->key_queue)
opd->key_cond = 0;
*r_key = queue_item->key;
free (queue_item);
return 0;
}
/* Terminate a pending keylist operation within CTX. */
gpgme_error_t
gpgme_op_keylist_end (gpgme_ctx_t ctx)
{
if (!ctx)
return gpg_error (GPG_ERR_INV_VALUE);
return 0;
}
/* Get the key with the fingerprint FPR from the crypto backend. If
SECRET is true, get the secret key. */
gpgme_error_t
gpgme_get_key (gpgme_ctx_t ctx, const char *fpr, gpgme_key_t *r_key,
int secret)
{
gpgme_ctx_t listctx;
gpgme_error_t err;
gpgme_key_t key;
if (!ctx || !r_key || !fpr)
return gpg_error (GPG_ERR_INV_VALUE);
if (strlen (fpr) < 8) /* We have at least a key ID. */
return gpg_error (GPG_ERR_INV_VALUE);
/* FIXME: We use our own context because we have to avoid the user's
I/O callback handlers. */
err = gpgme_new (&listctx);
if (err)
return err;
{
gpgme_protocol_t proto;
gpgme_engine_info_t info;
/* Clone the relevant state. */
proto = gpgme_get_protocol (ctx);
gpgme_set_protocol (listctx, proto);
gpgme_set_keylist_mode (listctx, gpgme_get_keylist_mode (ctx));
info = gpgme_ctx_get_engine_info (ctx);
while (info && info->protocol != proto)
info = info->next;
if (info)
gpgme_ctx_set_engine_info (listctx, proto,
info->file_name, info->home_dir);
}
err = gpgme_op_keylist_start (listctx, fpr, secret);
if (!err)
err = gpgme_op_keylist_next (listctx, r_key);
if (!err)
{
err = gpgme_op_keylist_next (listctx, &key);
if (gpgme_err_code (err) == GPG_ERR_EOF)
err = gpg_error (GPG_ERR_NO_ERROR);
else
{
if (!err)
{
gpgme_key_unref (key);
err = gpg_error (GPG_ERR_AMBIGUOUS_NAME);
}
gpgme_key_unref (*r_key);
}
}
gpgme_release (listctx);
return err;
}
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