6baccdc0c3
* src/op-support.c (_gpgme_parse_plaintext): Decode filename
as percent string.
--
From gnupg/doc/DETAILS:
If a filename is available it gets printed as the third
argument, percent-escaped as usual.
so we can use the usual percent decode function here.
GnuPG-Bug-Id: T6852
433 lines
10 KiB
C
433 lines
10 KiB
C
/* op-support.c - Supporting functions.
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* Copyright (C) 2002, 2003, 2004, 2007 g10 Code GmbH
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*
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* This file is part of GPGME.
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*
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* GPGME is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* GPGME is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, see <https://gnu.org/licenses/>.
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#if HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#include "gpgme.h"
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#include "context.h"
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#include "ops.h"
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#include "util.h"
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#include "debug.h"
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gpgme_error_t
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_gpgme_op_data_lookup (gpgme_ctx_t ctx, ctx_op_data_id_t type, void **hook,
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int size, void (*cleanup) (void *))
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{
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struct ctx_op_data *data;
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if (!ctx)
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return gpg_error (GPG_ERR_INV_VALUE);
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data = ctx->op_data;
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while (data && data->type != type)
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data = data->next;
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if (!data)
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{
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if (size < 0)
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{
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*hook = NULL;
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return 0;
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}
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data = calloc (1, sizeof (struct ctx_op_data) + size);
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if (!data)
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return gpg_error_from_syserror ();
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data->magic = CTX_OP_DATA_MAGIC;
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data->next = ctx->op_data;
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data->type = type;
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data->cleanup = cleanup;
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data->hook = (void *) (((char *) data) + sizeof (struct ctx_op_data));
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data->references = 1;
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ctx->op_data = data;
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}
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*hook = data->hook;
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return 0;
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}
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/* type is: 0: asynchronous operation (use global or user event loop).
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1: synchronous operation (always use private event loop).
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2: asynchronous private operation (use private or user
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event loop).
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256: Modification flag to suppress the engine reset.
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*/
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gpgme_error_t
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_gpgme_op_reset (gpgme_ctx_t ctx, int type)
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{
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gpgme_error_t err = 0;
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struct gpgme_io_cbs io_cbs;
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int no_reset = (type & 256);
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int reuse_engine = 0;
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type &= 255;
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_gpgme_release_result (ctx);
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LOCK (ctx->lock);
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ctx->canceled = 0;
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ctx->redraw_suggested = 0;
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UNLOCK (ctx->lock);
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if (ctx->engine && no_reset)
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reuse_engine = 1;
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else if (ctx->engine)
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{
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/* Attempt to reset an existing engine. */
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err = _gpgme_engine_reset (ctx->engine);
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if (gpg_err_code (err) == GPG_ERR_NOT_IMPLEMENTED)
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{
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_gpgme_engine_release (ctx->engine);
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ctx->engine = NULL;
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}
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}
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if (!ctx->engine)
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{
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gpgme_engine_info_t info;
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info = ctx->engine_info;
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while (info && info->protocol != ctx->protocol)
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info = info->next;
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if (!info)
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return gpg_error (GPG_ERR_UNSUPPORTED_PROTOCOL);
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/* Create an engine object. */
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err = _gpgme_engine_new (info, &ctx->engine);
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if (err)
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return err;
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}
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if (!reuse_engine)
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{
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err = 0;
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#ifdef LC_CTYPE
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err = _gpgme_engine_set_locale (ctx->engine, LC_CTYPE, ctx->lc_ctype);
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#endif
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#ifdef LC_MESSAGES
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if (!err)
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err = _gpgme_engine_set_locale (ctx->engine,
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LC_MESSAGES, ctx->lc_messages);
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#endif
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if (gpg_err_code (err) == GPG_ERR_NOT_IMPLEMENTED)
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err = 0;
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_gpgme_engine_set_engine_flags (ctx->engine, ctx);
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if (!err)
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{
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err = _gpgme_engine_set_pinentry_mode (ctx->engine,
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ctx->pinentry_mode);
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if (gpg_err_code (err) == GPG_ERR_NOT_IMPLEMENTED)
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err = 0;
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}
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if (!err && ctx->status_cb && ctx->full_status)
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{
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_gpgme_engine_set_status_cb (ctx->engine,
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ctx->status_cb, ctx->status_cb_value);
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}
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if (err)
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{
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_gpgme_engine_release (ctx->engine);
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ctx->engine = NULL;
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return err;
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}
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}
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if (ctx->sub_protocol != GPGME_PROTOCOL_DEFAULT)
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{
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err = _gpgme_engine_set_protocol (ctx->engine, ctx->sub_protocol);
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if (err)
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return err;
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}
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if (type == 1 || (type == 2 && !ctx->io_cbs.add))
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{
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/* Use private event loop. */
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io_cbs.add = _gpgme_add_io_cb;
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io_cbs.add_priv = ctx;
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io_cbs.remove = _gpgme_remove_io_cb;
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io_cbs.event = _gpgme_wait_private_event_cb;
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io_cbs.event_priv = ctx;
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}
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else if (! ctx->io_cbs.add)
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{
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/* Use global event loop. */
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io_cbs.add = _gpgme_add_io_cb;
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io_cbs.add_priv = ctx;
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io_cbs.remove = _gpgme_remove_io_cb;
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io_cbs.event = _gpgme_wait_global_event_cb;
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io_cbs.event_priv = ctx;
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}
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else
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{
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/* Use user event loop. */
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io_cbs.add = _gpgme_wait_user_add_io_cb;
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io_cbs.add_priv = ctx;
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io_cbs.remove = _gpgme_wait_user_remove_io_cb;
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io_cbs.event = _gpgme_wait_user_event_cb;
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io_cbs.event_priv = ctx;
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}
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_gpgme_engine_set_io_cbs (ctx->engine, &io_cbs);
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return err;
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}
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/* Parse the INV_RECP or INV_SNDR status line in ARGS and return the
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result in KEY. If KC_FPR (from the KEY_CONSIDERED status line) is
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not NULL take the KC_FLAGS in account. */
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gpgme_error_t
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_gpgme_parse_inv_recp (char *args, int for_signing,
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const char *kc_fpr, unsigned int kc_flags,
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gpgme_invalid_key_t *key)
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{
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gpgme_invalid_key_t inv_key;
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char *tail;
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long int reason;
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(void)for_signing;
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inv_key = calloc (1, sizeof (*inv_key));
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if (!inv_key)
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return gpg_error_from_syserror ();
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inv_key->next = NULL;
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gpg_err_set_errno (0);
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reason = strtol (args, &tail, 0);
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if (errno || args == tail || (*tail && *tail != ' '))
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{
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/* The crypto backend does not behave. */
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free (inv_key);
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return trace_gpg_error (GPG_ERR_INV_ENGINE);
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}
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switch (reason)
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{
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case 0:
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if (kc_fpr && (kc_flags & 2))
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inv_key->reason = gpg_error (GPG_ERR_SUBKEYS_EXP_OR_REV);
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else
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inv_key->reason = gpg_error (GPG_ERR_GENERAL);
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break;
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case 1:
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inv_key->reason = gpg_error (GPG_ERR_NO_PUBKEY);
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break;
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case 2:
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inv_key->reason = gpg_error (GPG_ERR_AMBIGUOUS_NAME);
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break;
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case 3:
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inv_key->reason = gpg_error (GPG_ERR_WRONG_KEY_USAGE);
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break;
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case 4:
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inv_key->reason = gpg_error (GPG_ERR_CERT_REVOKED);
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break;
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case 5:
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inv_key->reason = gpg_error (GPG_ERR_CERT_EXPIRED);
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break;
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case 6:
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inv_key->reason = gpg_error (GPG_ERR_NO_CRL_KNOWN);
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break;
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case 7:
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inv_key->reason = gpg_error (GPG_ERR_CRL_TOO_OLD);
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break;
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case 8:
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inv_key->reason = gpg_error (GPG_ERR_NO_POLICY_MATCH);
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break;
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case 9:
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inv_key->reason = gpg_error (GPG_ERR_NO_SECKEY);
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break;
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case 10:
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inv_key->reason = gpg_error (GPG_ERR_PUBKEY_NOT_TRUSTED);
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break;
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case 11:
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inv_key->reason = gpg_error (GPG_ERR_MISSING_CERT);
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break;
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case 12:
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inv_key->reason = gpg_error (GPG_ERR_MISSING_ISSUER_CERT);
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break;
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case 13:
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inv_key->reason = gpg_error (252); /*GPG_ERR_KEY_DISABLED*/
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break;
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case 14:
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inv_key->reason = gpg_error (GPG_ERR_INV_USER_ID);
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break;
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default:
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inv_key->reason = gpg_error (GPG_ERR_GENERAL);
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break;
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}
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while (*tail && *tail == ' ')
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tail++;
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if (*tail)
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{
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inv_key->fpr = strdup (tail);
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if (!inv_key->fpr)
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{
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free (inv_key);
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return gpg_error_from_syserror ();
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}
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}
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*key = inv_key;
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return 0;
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}
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/* Parse a KEY_CONSIDERED status line in ARGS and store the
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* fingerprint and the flags at R_FPR and R_FLAGS. The caller must
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* free the value at R_FPR on success. */
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gpgme_error_t
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_gpgme_parse_key_considered (const char *args,
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char **r_fpr, unsigned int *r_flags)
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{
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char *pend;
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size_t n;
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*r_fpr = NULL;
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pend = strchr (args, ' ');
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if (!pend || pend == args)
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return trace_gpg_error (GPG_ERR_INV_ENGINE); /* Bogus status line. */
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n = pend - args;
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*r_fpr = malloc (n + 1);
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if (!*r_fpr)
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return gpg_error_from_syserror ();
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memcpy (*r_fpr, args, n);
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(*r_fpr)[n] = 0;
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args = pend + 1;
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gpg_err_set_errno (0);
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*r_flags = strtoul (args, &pend, 0);
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if (errno || args == pend || (*pend && *pend != ' '))
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{
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free (*r_fpr);
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*r_fpr = NULL;
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return trace_gpg_error (GPG_ERR_INV_ENGINE);
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}
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return 0;
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}
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/* Parse the PLAINTEXT status line in ARGS and return the result in
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FILENAMEP. */
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gpgme_error_t
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_gpgme_parse_plaintext (char *args, char **filenamep, int *r_mime)
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{
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char *tail;
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while (*args == ' ')
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args++;
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if (*args == '\0')
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return 0;
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/* First argument is file type (a one byte uppercase hex value). */
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if (args[0] == '6' && args[1] == 'D')
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*r_mime = 1;
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while (*args != ' ' && *args != '\0')
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args++;
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while (*args == ' ')
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args++;
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if (*args == '\0')
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return 0;
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/* Second argument is the timestamp. */
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while (*args != ' ' && *args != '\0')
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args++;
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while (*args == ' ')
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args++;
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if (*args == '\0')
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return 0;
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tail = args;
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while (*tail != ' ' && *tail != '\0')
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tail++;
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*tail = '\0';
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if (filenamep && *args != '\0')
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{
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gpgme_error_t err = 0;
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char *filename = NULL;
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err = _gpgme_decode_percent_string (args, &filename, 0, 0);
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if (err)
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return err;
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*filenamep = filename;
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}
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return 0;
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}
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/* Parse a FAILURE status line and return the error code. ARGS is
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* modified to contain the location part. Note that for now we ignore
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* failure codes with a location of gpg-exit; they are too trouble
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* some. Instead we should eventually record that error in the
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* context and provide a function to return a fuller error
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* description; this could then also show the location of the error
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* (e.g. "option- parser") to make it easier for the user to detect
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* the actual error. */
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gpgme_error_t
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_gpgme_parse_failure (char *args)
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{
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char *where, *which;
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if (!strncmp (args, "gpg-exit", 8))
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return 0;
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where = strchr (args, ' ');
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if (!where)
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return trace_gpg_error (GPG_ERR_INV_ENGINE);
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*where = '\0';
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which = where + 1;
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where = strchr (which, ' ');
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if (where)
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*where = '\0';
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return atoi (which);
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}
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