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/*
* librest - RESTful web services access
* Copyright (c) 2008, 2009, Intel Corporation.
*
* Authors: Ross Burton <ross@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU Lesser General Public License,
* version 2.1, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <string.h>
#include <glib.h>
#include "sha1.h"
#define SHA1_LENGTH 20
/*
* hmac_sha1:
* @key: The key
* @message: The message
*
* Given the key and message, compute the HMAC-SHA1 hash and return the base-64
* encoding of it. This is very geared towards OAuth, and as such both key and
* message must be NULL-terminated strings, and the result is base-64 encoded.
*/
char *
hmac_sha1 (const char *key, const char *message)
{
GHmac *hmac;
gsize digest_length = SHA1_LENGTH;
guchar digest[digest_length];
hmac = g_hmac_new (G_CHECKSUM_SHA1, (guchar *)key, strlen (key));
g_hmac_update (hmac, (guchar *)message, -1);
g_hmac_get_digest (hmac, digest, &digest_length);
g_hmac_unref (hmac);
return g_base64_encode (digest, digest_length);
}
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