diff options
Diffstat (limited to 'drivers/staging/rt2860/common/crypt_hmac.c')
| -rw-r--r-- | drivers/staging/rt2860/common/crypt_hmac.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/drivers/staging/rt2860/common/crypt_hmac.c b/drivers/staging/rt2860/common/crypt_hmac.c new file mode 100644 index 000000000000..d7ab08ec1a41 --- /dev/null +++ b/drivers/staging/rt2860/common/crypt_hmac.c @@ -0,0 +1,187 @@ +/* + ************************************************************************* + * 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) +{ + struct rt_sha1_ctx sha_ctx1; + struct rt_sha1_ctx sha_ctx2; + u8 K0[SHA1_BLOCK_SIZE]; + u8 Digest[SHA1_DIGEST_SIZE]; + u32 index; + + NdisZeroMemory(&sha_ctx1, sizeof(struct rt_sha1_ctx)); + NdisZeroMemory(&sha_ctx2, sizeof(struct rt_sha1_ctx)); + /* + * 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) +{ + struct rt_md5_ctx_struc md5_ctx1; + struct rt_md5_ctx_struc md5_ctx2; + u8 K0[MD5_BLOCK_SIZE]; + u8 Digest[MD5_DIGEST_SIZE]; + u32 index; + + NdisZeroMemory(&md5_ctx1, sizeof(struct rt_md5_ctx_struc)); + NdisZeroMemory(&md5_ctx2, sizeof(struct rt_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 */ |