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/* keysign.c - OpenPGP key signing
* Copyright (C) 2016 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, see <https://www.gnu.org/licenses/>.
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "gpgme.h"
#include "debug.h"
#include "context.h"
#include "ops.h"
#include "util.h"
typedef struct
{
/* The error code from a FAILURE status line or 0. */
gpg_error_t failure_code;
/* The error code from certain ERROR status lines or 0. */
gpg_error_t error_code;
} *op_data_t;
static void
release_op_data (void *hook)
{
op_data_t opd = (op_data_t) hook;
(void)opd;
}
/* Parse an error status line. Return the error location and the
error code. The function may modify ARGS. */
static char *
parse_error (char *args, gpg_error_t *r_err)
{
char *where = strchr (args, ' ');
char *which;
if (where)
{
*where = '\0';
which = where + 1;
where = strchr (which, ' ');
if (where)
*where = '\0';
where = args;
}
else
{
*r_err = trace_gpg_error (GPG_ERR_INV_ENGINE);
return NULL;
}
*r_err = atoi (which);
return where;
}
static gpgme_error_t
keysign_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;
char *loc;
/* Pipe the status code through the progress status handler. */
err = _gpgme_progress_status_handler (ctx, code, args);
if (err)
return err;
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYSIGN, &hook, -1, NULL);
opd = hook;
if (err)
return err;
switch (code)
{
case GPGME_STATUS_ERROR:
loc = parse_error (args, &err);
if (!loc)
return err;
if (!opd->error_code)
opd->error_code = err;
break;
case GPGME_STATUS_FAILURE:
opd->failure_code = _gpgme_parse_failure (args);
break;
case GPGME_STATUS_EOF:
if (opd->error_code)
return opd->error_code;
else if (opd->failure_code)
return opd->failure_code;
break;
case GPGME_STATUS_INQUIRE_MAXLEN:
if (ctx->status_cb && !ctx->full_status)
{
err = ctx->status_cb (ctx->status_cb_value, "INQUIRE_MAXLEN", args);
if (err)
return err;
}
break;
default:
break;
}
return 0;
}
/* Sign the USERID of KEY using the current set of signers. If USERID
* is NULL, sign all user ids. To put several user ids into USERID,
* separate them by LF and set the flag GPGME_KEYSIGN_LFSEP. */
static gpgme_error_t
keysign_start (gpgme_ctx_t ctx, int synchronous,
gpgme_key_t key, const char *userid,
unsigned long expires, unsigned int flags)
{
gpgme_error_t err;
void *hook;
op_data_t opd;
if (ctx->protocol != GPGME_PROTOCOL_OPENPGP)
return gpgme_error (GPG_ERR_UNSUPPORTED_PROTOCOL);
err = _gpgme_op_reset (ctx, synchronous);
if (err)
return err;
if (!key)
return gpg_error (GPG_ERR_INV_ARG);
err = _gpgme_op_data_lookup (ctx, OPDATA_KEYSIGN, &hook,
sizeof (*opd), release_op_data);
opd = hook;
if (err)
return err;
_gpgme_engine_set_status_handler (ctx->engine, keysign_status_handler, ctx);
if (ctx->passphrase_cb)
{
err = _gpgme_engine_set_command_handler
(ctx->engine, _gpgme_passphrase_command_handler, ctx, NULL);
if (err)
return err;
}
return _gpgme_engine_op_keysign (ctx->engine,
key, userid, expires, flags, ctx);
}
/* Sign the USERID of KEY using the current set of signers. */
gpgme_error_t
gpgme_op_keysign_start (gpgme_ctx_t ctx, gpgme_key_t key, const char *userid,
unsigned long expires, unsigned int flags)
{
gpgme_error_t err;
TRACE_BEG3 (DEBUG_CTX, "gpgme_op_keysign_start", ctx,
"key=%p, uid='%s' flags=0x%x", key, userid, flags);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_ARG));
err = keysign_start (ctx, 0, key, userid, expires, flags);
return TRACE_ERR (err);
}
gpgme_error_t
gpgme_op_keysign (gpgme_ctx_t ctx, gpgme_key_t key, const char *userid,
unsigned long expires, unsigned int flags)
{
gpgme_error_t err;
TRACE_BEG3 (DEBUG_CTX, "gpgme_op_keysign", ctx,
"key=%p, uid='%s' flags=0x%x", key, userid, flags);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_ARG));
err = keysign_start (ctx, 1, key, userid, expires, flags);
if (!err)
err = _gpgme_wait_one (ctx);
return TRACE_ERR (err);
}
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