1 /* 2 * AMD Cryptographic Coprocessor (CCP) crypto API support 3 * 4 * Copyright (C) 2013 Advanced Micro Devices, Inc. 5 * 6 * Author: Tom Lendacky <thomas.lendacky@amd.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #ifndef __CCP_CRYPTO_H__ 14 #define __CCP_CRYPTO_H__ 15 16 #include <linux/list.h> 17 #include <linux/wait.h> 18 #include <linux/pci.h> 19 #include <linux/ccp.h> 20 #include <linux/crypto.h> 21 #include <crypto/algapi.h> 22 #include <crypto/aes.h> 23 #include <crypto/ctr.h> 24 #include <crypto/hash.h> 25 #include <crypto/sha.h> 26 27 #define CCP_CRA_PRIORITY 300 28 29 struct ccp_crypto_ablkcipher_alg { 30 struct list_head entry; 31 32 u32 mode; 33 34 struct crypto_alg alg; 35 }; 36 37 struct ccp_crypto_ahash_alg { 38 struct list_head entry; 39 40 const __be32 *init; 41 u32 type; 42 u32 mode; 43 44 /* Child algorithm used for HMAC, CMAC, etc */ 45 char child_alg[CRYPTO_MAX_ALG_NAME]; 46 47 struct ahash_alg alg; 48 }; 49 50 static inline struct ccp_crypto_ablkcipher_alg * 51 ccp_crypto_ablkcipher_alg(struct crypto_tfm *tfm) 52 { 53 struct crypto_alg *alg = tfm->__crt_alg; 54 55 return container_of(alg, struct ccp_crypto_ablkcipher_alg, alg); 56 } 57 58 static inline struct ccp_crypto_ahash_alg * 59 ccp_crypto_ahash_alg(struct crypto_tfm *tfm) 60 { 61 struct crypto_alg *alg = tfm->__crt_alg; 62 struct ahash_alg *ahash_alg; 63 64 ahash_alg = container_of(alg, struct ahash_alg, halg.base); 65 66 return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg); 67 } 68 69 /***** AES related defines *****/ 70 struct ccp_aes_ctx { 71 /* Fallback cipher for XTS with unsupported unit sizes */ 72 struct crypto_ablkcipher *tfm_ablkcipher; 73 74 /* Cipher used to generate CMAC K1/K2 keys */ 75 struct crypto_cipher *tfm_cipher; 76 77 enum ccp_engine engine; 78 enum ccp_aes_type type; 79 enum ccp_aes_mode mode; 80 81 struct scatterlist key_sg; 82 unsigned int key_len; 83 u8 key[AES_MAX_KEY_SIZE]; 84 85 u8 nonce[CTR_RFC3686_NONCE_SIZE]; 86 87 /* CMAC key structures */ 88 struct scatterlist k1_sg; 89 struct scatterlist k2_sg; 90 unsigned int kn_len; 91 u8 k1[AES_BLOCK_SIZE]; 92 u8 k2[AES_BLOCK_SIZE]; 93 }; 94 95 struct ccp_aes_req_ctx { 96 struct scatterlist iv_sg; 97 u8 iv[AES_BLOCK_SIZE]; 98 99 /* Fields used for RFC3686 requests */ 100 u8 *rfc3686_info; 101 u8 rfc3686_iv[AES_BLOCK_SIZE]; 102 103 struct ccp_cmd cmd; 104 }; 105 106 struct ccp_aes_cmac_req_ctx { 107 unsigned int null_msg; 108 unsigned int final; 109 110 struct scatterlist *src; 111 unsigned int nbytes; 112 113 u64 hash_cnt; 114 unsigned int hash_rem; 115 116 struct sg_table data_sg; 117 118 struct scatterlist iv_sg; 119 u8 iv[AES_BLOCK_SIZE]; 120 121 struct scatterlist buf_sg; 122 unsigned int buf_count; 123 u8 buf[AES_BLOCK_SIZE]; 124 125 struct scatterlist pad_sg; 126 unsigned int pad_count; 127 u8 pad[AES_BLOCK_SIZE]; 128 129 struct ccp_cmd cmd; 130 }; 131 132 /***** SHA related defines *****/ 133 #define MAX_SHA_CONTEXT_SIZE SHA256_DIGEST_SIZE 134 #define MAX_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE 135 136 struct ccp_sha_ctx { 137 struct scatterlist opad_sg; 138 unsigned int opad_count; 139 140 unsigned int key_len; 141 u8 key[MAX_SHA_BLOCK_SIZE]; 142 u8 ipad[MAX_SHA_BLOCK_SIZE]; 143 u8 opad[MAX_SHA_BLOCK_SIZE]; 144 struct crypto_shash *hmac_tfm; 145 }; 146 147 struct ccp_sha_req_ctx { 148 enum ccp_sha_type type; 149 150 u64 msg_bits; 151 152 unsigned int first; 153 unsigned int final; 154 155 struct scatterlist *src; 156 unsigned int nbytes; 157 158 u64 hash_cnt; 159 unsigned int hash_rem; 160 161 struct sg_table data_sg; 162 163 struct scatterlist ctx_sg; 164 u8 ctx[MAX_SHA_CONTEXT_SIZE]; 165 166 struct scatterlist buf_sg; 167 unsigned int buf_count; 168 u8 buf[MAX_SHA_BLOCK_SIZE]; 169 170 /* CCP driver command */ 171 struct ccp_cmd cmd; 172 }; 173 174 /***** Common Context Structure *****/ 175 struct ccp_ctx { 176 int (*complete)(struct crypto_async_request *req, int ret); 177 178 union { 179 struct ccp_aes_ctx aes; 180 struct ccp_sha_ctx sha; 181 } u; 182 }; 183 184 int ccp_crypto_enqueue_request(struct crypto_async_request *req, 185 struct ccp_cmd *cmd); 186 struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table, 187 struct scatterlist *sg_add); 188 189 int ccp_register_aes_algs(struct list_head *head); 190 int ccp_register_aes_cmac_algs(struct list_head *head); 191 int ccp_register_aes_xts_algs(struct list_head *head); 192 int ccp_register_sha_algs(struct list_head *head); 193 194 #endif 195