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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 <string.h>
#define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr[0]))
/* Create a GPG context (GMime 2.6) */
static GMimeCryptoContext*
create_gpg_context (_notmuch_crypto_t *crypto)
{
GMimeCryptoContext *gpgctx;
if (crypto->gpgctx) {
return crypto->gpgctx;
}
/* TODO: GMimePasswordRequestFunc */
gpgctx = g_mime_gpg_context_new (NULL, crypto->gpgpath ? crypto->gpgpath : "gpg");
if (! gpgctx) {
fprintf (stderr, "Failed to construct gpg context.\n");
return NULL;
}
crypto->gpgctx = gpgctx;
g_mime_gpg_context_set_use_agent ((GMimeGpgContext *) gpgctx, TRUE);
g_mime_gpg_context_set_always_trust ((GMimeGpgContext *) gpgctx, FALSE);
return crypto->gpgctx;
}
static const struct {
const char *protocol;
GMimeCryptoContext *(*get_context) (_notmuch_crypto_t *crypto);
} protocols[] = {
{
.protocol = "application/pgp-signature",
.get_context = create_gpg_context,
},
{
.protocol = "application/pgp-encrypted",
.get_context = create_gpg_context,
},
};
/* for the specified protocol return the context pointer (initializing
* if needed) */
GMimeCryptoContext *
_notmuch_crypto_get_gmime_context (_notmuch_crypto_t *crypto, const char *protocol)
{
GMimeCryptoContext *cryptoctx = NULL;
size_t i;
if (! protocol) {
fprintf (stderr, "Cryptographic protocol is empty.\n");
return cryptoctx;
}
/* 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 (i = 0; i < ARRAY_SIZE (protocols); i++) {
if (strcasecmp (protocol, protocols[i].protocol) == 0)
return protocols[i].get_context (crypto);
}
fprintf (stderr, "Unknown or unsupported cryptographic protocol %s.\n",
protocol);
return NULL;
}
void
_notmuch_crypto_cleanup (_notmuch_crypto_t *crypto)
{
if (crypto->gpgctx) {
g_object_unref (crypto->gpgctx);
crypto->gpgctx = NULL;
}
}
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