/*
*************************************************************************
* Ralink Tech Inc.
* 5F., No.36, Taiyuan St., Jhubei City,
* Hsinchu County 302,
* Taiwan, R.O.C.
*
* (c) Copyright 2002-2007, Ralink Technology, Inc.
*
* 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 2 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
*************************************************************************/
#include "../crypt_hmac.h"
#ifdef HMAC_SHA1_SUPPORT
/*
========================================================================
Routine Description:
HMAC using SHA1 hash function
Arguments:
key Secret key
key_len The length of the key in bytes
message Message context
message_len The length of message in bytes
macLen Request the length of message authentication code
Return Value:
mac Message authentication code
Note:
None
========================================================================
*/
void HMAC_SHA1(IN const u8 Key[],
u32 KeyLen,
IN const u8 Message[],
u32 MessageLen, u8 MAC[], u32 MACLen)
{
SHA1_CTX_STRUC sha_ctx1;
SHA1_CTX_STRUC sha_ctx2;
u8 K0[SHA1_BLOCK_SIZE];
u8 Digest[SHA1_DIGEST_SIZE];
u32 index;
NdisZeroMemory(&sha_ctx1, sizeof(SHA1_CTX_STRUC));
NdisZeroMemory(&sha_ctx2, sizeof(SHA1_CTX_STRUC));
/*
* If the length of K = B(Block size): K0 = K.
* If the length of K > B: hash K to obtain an L byte string,
* then append (B-L) zeros to create a B-byte string K0 (i.e., K0 = H(K) || 00...00).
* If the length of K < B: append zeros to the end of K to create a B-byte string K0
*/
NdisZeroMemory(K0, SHA1_BLOCK_SIZE);
if (KeyLen <= SHA1_BLOCK_SIZE)
NdisMoveMemory(K0, Key, KeyLen);
else
RT_SHA1(Key, KeyLen, K0);
/* End of if */
/* Exclusive-Or K0 with ipad */
/* ipad: Inner pad; the byte x¡¦36¡¦ repeated B times. */
for (index = 0; index < SHA1_BLOCK_SIZE; index++)
K0[index] ^= 0x36;
/* End of for */
RT_SHA1_Init(&sha_ctx1);
/* H(K0^ipad) */
SHA1_Append(&sha_ctx1, K0, sizeof(K0));
/* H((K0^ipad)||text) */
SHA1_Append(&sha_ctx1, Message, MessageLen);
SHA1_End(&sha_ctx1, Digest);
/* Exclusive-Or K0 with opad and remove ipad */
/* opad: Outer pad; the byte x¡¦5c¡¦ repeated B times. */
for (index = 0; index < SHA1_BLOCK_SIZE; index++)
K0[index] ^= 0x36 ^ 0x5c;
/* End of for */
RT_SHA1_Init(&sha_ctx2);
/* H(K0^opad) */
SHA1_Append(&sha_ctx2, K0, sizeof(K0));
/* H( (K0^opad) || H((K0^ipad)||text) ) */
SHA1_Append(&sha_ctx2, Digest, SHA1_DIGEST_SIZE);
SHA1_End(&sha_ctx2, Digest);
if (MACLen > SHA1_DIGEST_SIZE)
NdisMoveMemory(MAC, Digest, SHA1_DIGEST_SIZE);
else
NdisMoveMemory(MAC, Digest, MACLen);
} /* End of HMAC_SHA1 */
#endif /* HMAC_SHA1_SUPPORT */
#ifdef HMAC_MD5_SUPPORT
/*
========================================================================
Routine Description:
HMAC using MD5 hash function
Arguments:
key Secret key
key_len The length of the key in bytes
message Message context
message_len The length of message in bytes
macLen Request the length of message authentication code
Return Value:
mac Message authentication code
Note:
None
========================================================================
*/
void HMAC_MD5(IN const u8 Key[],
u32 KeyLen,
IN const u8 Message[],
u32 MessageLen, u8 MAC[], u32 MACLen)
{
MD5_CTX_STRUC md5_ctx1;
MD5_CTX_STRUC md5_ctx2;
u8 K0[MD5_BLOCK_SIZE];
u8 Digest[MD5_DIGEST_SIZE];
u32 index;
NdisZeroMemory(&md5_ctx1, sizeof(MD5_CTX_STRUC));
NdisZeroMemory(&md5_ctx2, sizeof(MD5_CTX_STRUC));
/*
* If the length of K = B(Block size): K0 = K.
* If the length of K > B: hash K to obtain an L byte string,
* then append (B-L) zeros to create a B-byte string K0 (i.e., K0 = H(K) || 00...00).
* If the length of K < B: append zeros to the end of K to create a B-byte string K0
*/
NdisZeroMemory(K0, MD5_BLOCK_SIZE);
if (KeyLen <= MD5_BLOCK_SIZE) {
NdisMoveMemory(K0, Key, KeyLen);
} else {
RT_MD5(Key, KeyLen, K0);
}
/* Exclusive-Or K0 with ipad */
/* ipad: Inner pad; the byte x¡¦36¡¦ repeated B times. */
for (index = 0; index < MD5_BLOCK_SIZE; index++)
K0[index] ^= 0x36;
/* End of for */
MD5_Init(&md5_ctx1);
/* H(K0^ipad) */
MD5_Append(&md5_ctx1, K0, sizeof(K0));
/* H((K0^ipad)||text) */
MD5_Append(&md5_ctx1, Message, MessageLen);
MD5_End(&md5_ctx1, Digest);
/* Exclusive-Or K0 with opad and remove ipad */
/* opad: Outer pad; the byte x¡¦5c¡¦ repeated B times. */
for (index = 0; index < MD5_BLOCK_SIZE; index++)
K0[index] ^= 0x36 ^ 0x5c;
/* End of for */
MD5_Init(&md5_ctx2);
/* H(K0^opad) */
MD5_Append(&md5_ctx2, K0, sizeof(K0));
/* H( (K0^opad) || H((K0^ipad)||text) ) */
MD5_Append(&md5_ctx2, Digest, MD5_DIGEST_SIZE);
MD5_End(&md5_ctx2, Digest);
if (MACLen > MD5_DIGEST_SIZE)
NdisMoveMemory(MAC, Digest, MD5_DIGEST_SIZE);
else
NdisMoveMemory(MAC, Digest, MACLen);
} /* End of HMAC_SHA256 */
#endif /* HMAC_MD5_SUPPORT */
/* End of crypt_hmac.c */
