1 /* 2 * Copyright (c) 2017-2018, 2020 The Linux Foundation. All rights reserved. 3 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for 6 * any purpose with or without fee is hereby granted, provided that the 7 * above copyright notice and this permission notice appear in all 8 * copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 11 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 12 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 13 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 14 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 15 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 16 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /** 21 * DOC: qdf_crypto.h 22 * This file provides OS abstraction for crypto APIs. 23 */ 24 25 #if !defined(__QDF_CRYPTO_H) 26 #define __QDF_CRYPTO_H 27 28 /* Include Files */ 29 #include "qdf_status.h" 30 #include <qdf_types.h> 31 #include <qdf_trace.h> 32 33 /* Preprocessor definitions and constants */ 34 #ifdef __cplusplus 35 extern "C" { 36 #endif /* __cplusplus */ 37 38 #define AES_BLOCK_SIZE 16 39 #define HMAC_SHA256_CRYPTO_TYPE "hmac(sha256)" 40 #define HMAC_SHA386_CRYPTO_TYPE "hmac(sha384)" 41 42 #define SHA256_CRYPTO_TYPE "sha256" 43 #define SHA386_CRYPTO_TYPE "sha384" 44 45 #define SHA256_DIGEST_SIZE 32 46 #define SHA384_DIGEST_SIZE 48 47 48 #define FIXED_PARAM_OFFSET_ASSOC_REQ 4 49 #define FIXED_PARAM_OFFSET_ASSOC_RSP 6 50 51 #define CMAC_TLEN 8 /* CMAC TLen = 64 bits (8 octets) */ 52 #define AAD_LEN 20 53 #define IEEE80211_MMIE_GMAC_MICLEN 16 54 55 #define IS_VALID_CTR_KEY_LEN(len) ((((len) == 16) || ((len) == 32) || \ 56 ((len) == 48)) ? 1 : 0) 57 58 #define WLAN_MAX_PRF_INTERATIONS_COUNT 255 59 60 /* Function declarations and documentation */ 61 62 /** 63 * qdf_get_hash: API to get hash using specific crypto and scatterlist 64 * @type: crypto type 65 * @element_cnt: scatterlist element count 66 * @addr: scatterlist element array 67 * @addr_len: element length array 68 * @hash: new hash 69 * 70 * Return: 0 if success else error code 71 */ 72 int qdf_get_hash(uint8_t *type, uint8_t element_cnt, 73 uint8_t *addr[], uint32_t *addr_len, 74 int8_t *hash); 75 76 /** 77 * qdf_get_hmac_hash: API to get hmac hash using specific crypto and 78 * scatterlist elements. 79 * @type: crypto type 80 * @key: key needs to be used for hmac api 81 * @keylen: length of key 82 * @element_cnt: scatterlist element count 83 * @addr: scatterlist element array 84 * @addr_len: element length array 85 * @hash: new hash 86 * 87 * Return: 0 if success else error code 88 */ 89 int qdf_get_hmac_hash(uint8_t *type, uint8_t *key, 90 uint32_t keylen, uint8_t element_cnt, 91 uint8_t *addr[], uint32_t *addr_len, int8_t *hash); 92 93 /** 94 * qdf_default_hmac_sha256_kdf()- This API calculates key data using default kdf 95 * defined in RFC4306. 96 * @secret: key which needs to be used in crypto 97 * @secret_len: key_len of secret 98 * @label: PRF label 99 * @optional_data: Data used for hash 100 * @optional_data_len: data length 101 * @key: key data output 102 * @keylen: key data length 103 * 104 * This API creates default KDF as defined in RFC4306 105 * PRF+ (K,S) = T1 | T2 | T3 | T4 | ... 106 * T1 = PRF (K, S | 0x01) 107 * T2 = PRF (K, T1 | S | 0x02) 108 * T3 = PRF (K, T2 | S | 0x03) 109 * T4 = PRF (K, T3 | S | 0x04) 110 * 111 * for every iteration its creates 32 bit of hash 112 * 113 * Return: QDF_STATUS 114 */ 115 QDF_STATUS 116 qdf_default_hmac_sha256_kdf(uint8_t *secret, uint32_t secret_len, 117 uint8_t *label, uint8_t *optional_data, 118 uint32_t optional_data_len, uint8_t *key, 119 uint32_t keylen); 120 121 /** 122 * qdf_get_keyed_hash: API to get hash using specific crypto and 123 * scatterlist elements. 124 * @type: crypto type 125 * @key: key needs to be used for hmac api 126 * @keylen: length of key 127 * @element_cnt: scatterlist element count 128 * @addr: scatterlist element array 129 * @addr_len: element length array 130 * @hash: new hash 131 * 132 * Return: 0 if success else error code 133 */ 134 int qdf_get_keyed_hash(const char *alg, const uint8_t *key, 135 unsigned int key_len, const uint8_t *src[], 136 size_t *src_len, size_t num_elements, uint8_t *out); 137 /** 138 * qdf_update_dbl: This API does the doubling operation as defined in RFC5297 139 * @d: input for doubling 140 * 141 * Return: None 142 */ 143 void qdf_update_dbl(uint8_t *d); 144 145 /** 146 * qdf_aes_s2v: This API gets vector from AES string as defined in RFC5297 147 * output length will be AES_BLOCK_SIZE. 148 * @key: key used for operation 149 * @key_len: key len 150 * @s: addresses of elements to be used 151 * @s_len: array of element length 152 * @num_s: number of elements 153 * @out: pointer to output vector 154 * 155 * Return: 0 if success else Error number 156 */ 157 int qdf_aes_s2v(const uint8_t *key, unsigned int key_len, const uint8_t *s[], 158 size_t s_len[], size_t num_s, uint8_t *out); 159 160 /** 161 * qdf_aes_ctr: This API defines AES Counter Mode 162 * @key: key used for operation 163 * @key_len: key len 164 * @siv: Initialization vector 165 * @src: input 166 * @src_len: input len 167 * @dest: output 168 * @enc: if encryption needs to be done or decryption 169 * 170 * Return: 0 if success else Error number 171 */ 172 int qdf_aes_ctr(const uint8_t *key, unsigned int key_len, uint8_t *siv, 173 const uint8_t *src, size_t src_len, uint8_t *dest, bool enc); 174 175 /** 176 * qdf_crypto_aes_gmac: This API calculates MIC for GMAC 177 * @key: key used for operation 178 * @key_length: key length 179 * @iv: Initialization vector 180 * @aad: Additional authentication data 181 * @data: Pointer to data 182 * @data_len: Length of data 183 * @mic: Pointer to MIC 184 * 185 * Return: 0 if success else Error number 186 */ 187 int qdf_crypto_aes_gmac(const uint8_t *key, uint16_t key_length, 188 uint8_t *iv, const uint8_t *aad, 189 const uint8_t *data, uint16_t data_len, uint8_t *mic); 190 191 /** 192 * qdf_crypto_aes_128_cmac: This API calculates MIC for AES 128 CMAC 193 * @key: key used for operation 194 * @data: Pointer to data 195 * @len: Length of data 196 * @mic: Pointer to MIC 197 * 198 * Return: 0 if success else Error number 199 */ 200 int qdf_crypto_aes_128_cmac(const uint8_t *key, const uint8_t *data, 201 uint16_t len, uint8_t *mic); 202 203 #ifdef __cplusplus 204 } 205 #endif /* __cplusplus */ 206 #endif /* __QDF_CRYPTO_H */ 207