diff options
Diffstat (limited to 'stack/smp/smp_cmac.c')
| -rw-r--r-- | stack/smp/smp_cmac.c | 76 |
1 files changed, 44 insertions, 32 deletions
diff --git a/stack/smp/smp_cmac.c b/stack/smp/smp_cmac.c index d72c3b5..44e776e 100644 --- a/stack/smp/smp_cmac.c +++ b/stack/smp/smp_cmac.c @@ -1,14 +1,26 @@ -/***************************************************************************** -** -** Name: smp_cmac.c -** -** Description: This file contains the implementation of the AES128 CMAC -** algorithm. -** -** -** Copyright (c) 2008-2009, Broadcom Corp., All Rights Reserved. -** Broadcom Bluetooth Core. Proprietary and confidential. -******************************************************************************/ +/****************************************************************************** + * + * Copyright (C) 2008-2012 Broadcom Corporation + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + ******************************************************************************/ + +/****************************************************************************** + * + * This file contains the implementation of the AES128 CMAC algorithm. + * + ******************************************************************************/ #include "bt_target.h" @@ -26,7 +38,7 @@ typedef struct UINT16 len; UINT16 round; }tCMAC_CB; - + tCMAC_CB cmac_cb; /* Rb for AES-128 as block cipher, LSB as [0] */ @@ -45,8 +57,8 @@ void print128(BT_OCTET16 x, const UINT8 *key_name) for (i = 0; i < 4; i ++) { - SMP_TRACE_WARNING4("%02x %02x %02x %02x", - p[BT_OCTET16_LEN - i*4 -1], p[BT_OCTET16_LEN - i*4 -2], + SMP_TRACE_WARNING4("%02x %02x %02x %02x", + p[BT_OCTET16_LEN - i*4 -1], p[BT_OCTET16_LEN - i*4 -2], p[BT_OCTET16_LEN - i*4 -3], p[BT_OCTET16_LEN - i*4 -4]); } #endif @@ -56,11 +68,11 @@ void print128(BT_OCTET16 x, const UINT8 *key_name) ** ** Function padding ** -** Description utility function to padding the given text to be a 128 bits +** Description utility function to padding the given text to be a 128 bits ** data. The parameter dest is input and output parameter, it ** must point to a BT_OCTET16_LEN memory space; where include ** length bytes valid data. -** +** ** Returns void ** *******************************************************************************/ @@ -76,7 +88,7 @@ static void padding ( BT_OCTET16 dest, UINT8 length ) ** Function leftshift_onebit ** ** Description utility function to left shift one bit for a 128 bits value. -** +** ** Returns void ** *******************************************************************************/ @@ -98,12 +110,12 @@ static void leftshift_onebit(UINT8 *input, UINT8 *output) ** Function cmac_aes_cleanup ** ** Description clean up function for AES_CMAC algorithm. -** +** ** Returns void ** *******************************************************************************/ static void cmac_aes_cleanup(void) -{ +{ if (cmac_cb.text != NULL) { GKI_freebuf(cmac_cb.text); @@ -116,7 +128,7 @@ static void cmac_aes_cleanup(void) ** Function cmac_aes_k_calculate ** ** Description This function is the calculation of block cipher using AES-128. -** +** ** Returns void ** *******************************************************************************/ @@ -138,7 +150,7 @@ static BOOLEAN cmac_aes_k_calculate(BT_OCTET16 key, UINT8 *p_signature, UINT16 t err = 1; break; } - + memcpy(x, output.param_buf, BT_OCTET16_LEN); i ++; } @@ -149,9 +161,9 @@ static BOOLEAN cmac_aes_k_calculate(BT_OCTET16 key, UINT8 *p_signature, UINT16 t memcpy(p_signature, p_mac, tlen); SMP_TRACE_DEBUG2("tlen = %d p_mac = %d", tlen, p_mac); - SMP_TRACE_DEBUG4("p_mac[0] = 0x%02x p_mac[1] = 0x%02x p_mac[2] = 0x%02x p_mac[3] = 0x%02x", + SMP_TRACE_DEBUG4("p_mac[0] = 0x%02x p_mac[1] = 0x%02x p_mac[2] = 0x%02x p_mac[3] = 0x%02x", *p_mac, *(p_mac + 1), *(p_mac + 2), *(p_mac + 3)); - SMP_TRACE_DEBUG4("p_mac[4] = 0x%02x p_mac[5] = 0x%02x p_mac[6] = 0x%02x p_mac[7] = 0x%02x", + SMP_TRACE_DEBUG4("p_mac[4] = 0x%02x p_mac[5] = 0x%02x p_mac[6] = 0x%02x p_mac[7] = 0x%02x", *(p_mac + 4), *(p_mac + 5), *(p_mac + 6), *(p_mac + 7)); return TRUE; @@ -166,7 +178,7 @@ static BOOLEAN cmac_aes_k_calculate(BT_OCTET16 key, UINT8 *p_signature, UINT16 t ** ** Description This function proceeed to prepare the last block of message ** Mn depending on the size of the message. -** +** ** Returns void ** *******************************************************************************/ @@ -197,7 +209,7 @@ static void cmac_prepare_last_block (BT_OCTET16 k1, BT_OCTET16 k2) ** Function cmac_subkey_cont ** ** Description This is the callback function when CIPHk(0[128]) is completed. -** +** ** Returns void ** *******************************************************************************/ @@ -242,9 +254,9 @@ static void cmac_subkey_cont(tSMP_ENC *p) ** Function cmac_generate_subkey ** ** Description This is the function to generate the two subkeys. -** +** ** Parameters key - CMAC key, expect SRK when used by SMP. -** +** ** Returns void ** *******************************************************************************/ @@ -269,13 +281,13 @@ static BOOLEAN cmac_generate_subkey(BT_OCTET16 key) ** Function AES_CMAC ** ** Description This is the AES-CMAC Generation Function with tlen implemented. -** +** ** Parameters key - CMAC key in little endian order, expect SRK when used by SMP. ** input - text to be signed in little endian byte order. ** length - length of the input in byte. ** tlen - lenth of mac desired ** p_signature - data pointer to where signed data to be stored, tlen long. -** +** ** Returns void ** *******************************************************************************/ @@ -288,7 +300,7 @@ BOOLEAN AES_CMAC ( BT_OCTET16 key, UINT8 *input, UINT16 length, SMP_TRACE_EVENT0 ("AES_CMAC "); - if (n == 0) n = 1; + if (n == 0) n = 1; len = n * BT_OCTET16_LEN; SMP_TRACE_WARNING1("AES128_CMAC started, allocate buffer size = %d", len); @@ -314,7 +326,7 @@ BOOLEAN AES_CMAC ( BT_OCTET16 key, UINT8 *input, UINT16 length, /* start calculation */ ret = cmac_aes_k_calculate(key, p_signature, tlen); } - /* clean up */ + /* clean up */ cmac_aes_cleanup(); } else @@ -322,7 +334,7 @@ BOOLEAN AES_CMAC ( BT_OCTET16 key, UINT8 *input, UINT16 length, ret = FALSE; SMP_TRACE_ERROR0("No resources"); } - + return ret; } |