/** @file hmac_md5.c
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*
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* @brief This file defines algorithm for hmac md5
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*
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* Copyright (C) 2014-2017, Marvell International Ltd.
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*
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* This software file (the "File") is distributed by Marvell International
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* Ltd. under the terms of the GNU General Public License Version 2, June 1991
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* (the "License"). You may use, redistribute and/or modify this File in
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* accordance with the terms and conditions of the License, a copy of which
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* is available by writing to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
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* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
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*
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
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* this warranty disclaimer.
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*/
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/******************************************************
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Change log:
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03/07/2014: Initial version
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******************************************************/
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#include "wltypes.h"
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#include "md5.h"
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#include "hostsa_ext_def.h"
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#include "authenticator.h"
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void
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Mrvl_hmac_md5(void *priv, UINT8 *text_data, int text_len, UINT8 *key,
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int key_len, void *digest)
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{
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phostsa_private psapriv = (phostsa_private)priv;
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hostsa_util_fns *util_fns = &psapriv->util_fns;
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//BufferDesc_t * pDesc = NULL;
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UINT8 buf[400] = { 0 };
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Mrvl_MD5_CTX *context;
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unsigned char *k_pad; /* padding - key XORd with i/opad */
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int i;
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#if 0
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/* Wait forever ensures a buffer */
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pDesc = (BufferDesc_t *) bml_AllocBuffer(ramHook_encrPoolConfig,
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400, BML_WAIT_FOREVER);
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#endif
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/* WLAN buffers are aligned, so k_pad start at a UINT32 boundary */
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//k_pad = (unsigned char *)BML_DATA_PTR(pDesc);
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k_pad = (unsigned char *)buf;
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context = (Mrvl_MD5_CTX *)(k_pad + 64);
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/* if key is longer than 64 bytes reset it to key=MD5(key) */
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if (key_len > 64) {
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Mrvl_MD5_CTX tctx;
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wpa_MD5Init(&tctx);
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wpa_MD5Update((void *)priv, &tctx, key, key_len);
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wpa_MD5Final((void *)priv, context->buffer, &tctx);
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key = context->buffer;
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key_len = 16;
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}
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/* the HMAC_MD5 transform looks like: */
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/* */
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/* MD5(K XOR opad, MD5(K XOR ipad, text)) */
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/* */
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/* where K is an n byte key */
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/* ipad is the byte 0x36 repeated 64 times */
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/* opad is the byte 0x5c repeated 64 times */
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/* and text is the data being protected */
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/* start out by storing key in pads */
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memset(util_fns, k_pad, 0, 64);
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memcpy(util_fns, k_pad, key, key_len);
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/* XOR key with ipad and opad values */
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for (i = 0; i < 16; i++) {
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((UINT32 *)k_pad)[i] ^= 0x36363636;
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}
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/* perform inner MD5 */
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wpa_MD5Init(context); /* init context for 1st pass */
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wpa_MD5Update((void *)priv, context, k_pad, 64); /* start with inner pad */
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wpa_MD5Update((void *)priv, context, text_data, text_len); /* then text of datagram */
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wpa_MD5Final((void *)priv, digest, context); /* finish up 1st pass */
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/* start out by storing key in pads */
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memset(util_fns, k_pad, 0, 64);
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memcpy(util_fns, k_pad, key, key_len);
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for (i = 0; i < 16; i++) {
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((UINT32 *)k_pad)[i] ^= 0x5c5c5c5c;
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}
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/* perform outer MD5 */
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wpa_MD5Init(context); /* init context for 2nd pass */
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wpa_MD5Update((void *)priv, context, k_pad, 64);
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/* start with outer pad */
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wpa_MD5Update((void *)priv, context, digest, 16);
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/* then results of 1st hash */
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wpa_MD5Final((void *)priv, digest, context); /* finish up 2nd pass */
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// bml_FreeBuffer((UINT32)pDesc);
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}
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