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| | /* notmuch - Not much of an email program, (just index and search)
*
* Copyright © 2012 Jameson Rollins
*
* This program 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.
*
* This program 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 http://www.gnu.org/licenses/ .
*
* Authors: Jameson Rollins <jrollins@finestructure.net>
* Daniel Kahn Gillmor <dkg@fifthhorseman.net>
*/
#include "notmuch.h"
#include "crypto.h"
#include "search-path.h"
#include <string.h>
#include <talloc.h>
#define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr[0]))
/* Create a GPG context (GMime 2.6) */
static notmuch_status_t
get_gpg_context (_notmuch_crypto_t *crypto, GMimeCryptoContext **ctx)
{
if (ctx == NULL || crypto == NULL)
return NOTMUCH_STATUS_NULL_POINTER;
if (crypto->gpgctx) {
*ctx = crypto->gpgctx;
return NOTMUCH_STATUS_SUCCESS;
}
/* TODO: GMimePasswordRequestFunc */
crypto->gpgctx = g_mime_gpg_context_new (NULL, _notmuch_crypto_get_gpg_path(crypto));
if (! crypto->gpgctx) {
return NOTMUCH_STATUS_FAILED_CRYPTO_CONTEXT_CREATION;
}
g_mime_gpg_context_set_use_agent ((GMimeGpgContext *) crypto->gpgctx, TRUE);
g_mime_gpg_context_set_always_trust ((GMimeGpgContext *) crypto->gpgctx, FALSE);
*ctx = crypto->gpgctx;
return NOTMUCH_STATUS_SUCCESS;
}
/* Create a PKCS7 context (GMime 2.6) */
static notmuch_status_t
create_pkcs7_context (_notmuch_crypto_t *crypto, GMimeCryptoContext **ctx)
{
if (ctx == NULL || crypto == NULL)
return NOTMUCH_STATUS_NULL_POINTER;
if (crypto->pkcs7ctx) {
*ctx = crypto->pkcs7ctx;
return NOTMUCH_STATUS_SUCCESS;
}
/* TODO: GMimePasswordRequestFunc */
crypto->pkcs7ctx = g_mime_pkcs7_context_new (NULL);
if (! crypto->pkcs7ctx) {
return NOTMUCH_STATUS_FAILED_CRYPTO_CONTEXT_CREATION;
}
g_mime_pkcs7_context_set_always_trust ((GMimePkcs7Context *) crypto->pkcs7ctx,
FALSE);
*ctx = crypto->pkcs7ctx;
return NOTMUCH_STATUS_SUCCESS;
}
static const struct {
const char *protocol;
notmuch_status_t (*get_context) (_notmuch_crypto_t *crypto, GMimeCryptoContext **ctx);
} protocols[] = {
{
.protocol = "application/pgp-signature",
.get_context = get_gpg_context,
},
{
.protocol = "application/pgp-encrypted",
.get_context = get_gpg_context,
},
{
.protocol = "application/pkcs7-signature",
.get_context = create_pkcs7_context,
},
{
.protocol = "application/x-pkcs7-signature",
.get_context = create_pkcs7_context,
},
};
/* for the specified protocol return the context pointer (initializing
* if needed) */
notmuch_status_t
_notmuch_crypto_get_gmime_ctx_for_protocol (_notmuch_crypto_t *crypto,
const char *protocol,
GMimeCryptoContext **ctx)
{
if (! protocol)
return NOTMUCH_STATUS_MALFORMED_CRYPTO_PROTOCOL;
/* As per RFC 1847 section 2.1: "the [protocol] value token is
* comprised of the type and sub-type tokens of the Content-Type".
* As per RFC 1521 section 2: "Content-Type values, subtypes, and
* parameter names as defined in this document are
* case-insensitive." Thus, we use strcasecmp for the protocol.
*/
for (size_t i = 0; i < ARRAY_SIZE (protocols); i++) {
if (strcasecmp (protocol, protocols[i].protocol) == 0)
return protocols[i].get_context (crypto, ctx);
}
return NOTMUCH_STATUS_UNKNOWN_CRYPTO_PROTOCOL;
}
const char*
_notmuch_crypto_get_gpg_path (const _notmuch_crypto_t *crypto)
{
if (crypto->gpg_path)
return crypto->gpg_path;
#define try_gpg_path(z) if (test_for_executable(z)) return z
try_gpg_path("gpg2");
try_gpg_path("gpg");
#undef try_gpg_path
return NULL;
}
notmuch_status_t
_notmuch_crypto_set_gpg_path (_notmuch_crypto_t *crypto, const char* gpg_path)
{
/* return success if this matches what is already configured */
if ((!gpg_path && !crypto->gpg_path) ||
(gpg_path && crypto->gpg_path && 0 == strcmp(gpg_path, crypto->gpg_path)))
return NOTMUCH_STATUS_SUCCESS;
if (!gpg_path && !test_for_executable(gpg_path))
return NOTMUCH_STATUS_FILE_ERROR;
/* clear any existing gpgctx, since things are changing */
if (crypto->gpgctx) {
g_object_unref (crypto->gpgctx);
crypto->gpgctx = NULL;
}
if (crypto->gpg_path) {
talloc_free(crypto->gpg_path);
crypto->gpg_path = NULL;
}
if (gpg_path)
crypto->gpg_path = talloc_strdup (NULL, gpg_path);
return NOTMUCH_STATUS_SUCCESS;
}
void
_notmuch_crypto_cleanup (_notmuch_crypto_t *crypto)
{
if (crypto->gpgctx) {
g_object_unref (crypto->gpgctx);
crypto->gpgctx = NULL;
}
if (crypto->pkcs7ctx) {
g_object_unref (crypto->pkcs7ctx);
crypto->pkcs7ctx = NULL;
}
talloc_free (crypto->gpg_path);
crypto->gpg_path = NULL;
}
|