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/*
* wocky-sasl-utils.c - Some sasl helper functions
* Copyright (C) 2006-2010 Collabora Ltd.
* @author Sjoerd Simons <sjoerd.simons@collabora.co.uk>
* Copyright (C) 2010 Sjoerd Simons <sjoerd@luon.net>
*
* This library 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.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "wocky-sasl-utils.h"
/* Generate a good random nonce encoded with base64 such that it falls in the
* allowable alphabet of various crypto mechanism. */
gchar *
sasl_generate_base64_nonce (void)
{
/* RFC 2831 recommends the the nonce to be either hexadecimal or base64 with
* at least 64 bits of entropy */
#define NR 8
guint32 n[NR];
int i;
for (i = 0; i < NR; i++)
n[i] = g_random_int ();
return g_base64_encode ((guchar *) n, sizeof (n));
}
GByteArray *
sasl_calculate_hmac (GChecksumType digest_type,
guint8 *key,
gsize key_len,
guint8 *text,
gsize text_len)
{
GHmac *hmac = g_hmac_new (digest_type, key, key_len);
gsize len = g_checksum_type_get_length (digest_type);
guint8 *digest = g_new (guint8, len);
g_hmac_update (hmac, text, text_len);
g_hmac_get_digest (hmac, digest, &len);
g_hmac_unref (hmac);
return g_byte_array_new_take (digest, len);
}
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