1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * AMD Cryptographic Coprocessor (CCP) crypto API support 4 * 5 * Copyright (C) 2013,2017 Advanced Micro Devices, Inc. 6 * 7 * Author: Tom Lendacky <thomas.lendacky@amd.com> 8 */ 9 10 #ifndef __CCP_CRYPTO_H__ 11 #define __CCP_CRYPTO_H__ 12 13 #include <linux/list.h> 14 #include <linux/wait.h> 15 #include <linux/ccp.h> 16 #include <crypto/algapi.h> 17 #include <crypto/aes.h> 18 #include <crypto/internal/aead.h> 19 #include <crypto/aead.h> 20 #include <crypto/ctr.h> 21 #include <crypto/hash.h> 22 #include <crypto/sha.h> 23 #include <crypto/akcipher.h> 24 #include <crypto/skcipher.h> 25 #include <crypto/internal/rsa.h> 26 27 /* We want the module name in front of our messages */ 28 #undef pr_fmt 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #define CCP_LOG_LEVEL KERN_INFO 32 33 #define CCP_CRA_PRIORITY 300 34 35 struct ccp_crypto_skcipher_alg { 36 struct list_head entry; 37 38 u32 mode; 39 40 struct skcipher_alg alg; 41 }; 42 43 struct ccp_crypto_aead { 44 struct list_head entry; 45 46 u32 mode; 47 48 struct aead_alg alg; 49 }; 50 51 struct ccp_crypto_ahash_alg { 52 struct list_head entry; 53 54 const __be32 *init; 55 u32 type; 56 u32 mode; 57 58 /* Child algorithm used for HMAC, CMAC, etc */ 59 char child_alg[CRYPTO_MAX_ALG_NAME]; 60 61 struct ahash_alg alg; 62 }; 63 64 struct ccp_crypto_akcipher_alg { 65 struct list_head entry; 66 67 struct akcipher_alg alg; 68 }; 69 70 static inline struct ccp_crypto_skcipher_alg * ccp_crypto_skcipher_alg(struct crypto_skcipher * tfm)71 ccp_crypto_skcipher_alg(struct crypto_skcipher *tfm) 72 { 73 struct skcipher_alg *alg = crypto_skcipher_alg(tfm); 74 75 return container_of(alg, struct ccp_crypto_skcipher_alg, alg); 76 } 77 78 static inline struct ccp_crypto_ahash_alg * ccp_crypto_ahash_alg(struct crypto_tfm * tfm)79 ccp_crypto_ahash_alg(struct crypto_tfm *tfm) 80 { 81 struct crypto_alg *alg = tfm->__crt_alg; 82 struct ahash_alg *ahash_alg; 83 84 ahash_alg = container_of(alg, struct ahash_alg, halg.base); 85 86 return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg); 87 } 88 89 /***** AES related defines *****/ 90 struct ccp_aes_ctx { 91 /* Fallback cipher for XTS with unsupported unit sizes */ 92 struct crypto_skcipher *tfm_skcipher; 93 94 enum ccp_engine engine; 95 enum ccp_aes_type type; 96 enum ccp_aes_mode mode; 97 98 struct scatterlist key_sg; 99 unsigned int key_len; 100 u8 key[AES_MAX_KEY_SIZE * 2]; 101 102 u8 nonce[CTR_RFC3686_NONCE_SIZE]; 103 104 /* CMAC key structures */ 105 struct scatterlist k1_sg; 106 struct scatterlist k2_sg; 107 unsigned int kn_len; 108 u8 k1[AES_BLOCK_SIZE]; 109 u8 k2[AES_BLOCK_SIZE]; 110 }; 111 112 struct ccp_aes_req_ctx { 113 struct scatterlist iv_sg; 114 u8 iv[AES_BLOCK_SIZE]; 115 116 struct scatterlist tag_sg; 117 u8 tag[AES_BLOCK_SIZE]; 118 119 /* Fields used for RFC3686 requests */ 120 u8 *rfc3686_info; 121 u8 rfc3686_iv[AES_BLOCK_SIZE]; 122 123 struct ccp_cmd cmd; 124 125 struct skcipher_request fallback_req; // keep at the end 126 }; 127 128 struct ccp_aes_cmac_req_ctx { 129 unsigned int null_msg; 130 unsigned int final; 131 132 struct scatterlist *src; 133 unsigned int nbytes; 134 135 u64 hash_cnt; 136 unsigned int hash_rem; 137 138 struct sg_table data_sg; 139 140 struct scatterlist iv_sg; 141 u8 iv[AES_BLOCK_SIZE]; 142 143 struct scatterlist buf_sg; 144 unsigned int buf_count; 145 u8 buf[AES_BLOCK_SIZE]; 146 147 struct scatterlist pad_sg; 148 unsigned int pad_count; 149 u8 pad[AES_BLOCK_SIZE]; 150 151 struct ccp_cmd cmd; 152 }; 153 154 struct ccp_aes_cmac_exp_ctx { 155 unsigned int null_msg; 156 157 u8 iv[AES_BLOCK_SIZE]; 158 159 unsigned int buf_count; 160 u8 buf[AES_BLOCK_SIZE]; 161 }; 162 163 /***** 3DES related defines *****/ 164 struct ccp_des3_ctx { 165 enum ccp_engine engine; 166 enum ccp_des3_type type; 167 enum ccp_des3_mode mode; 168 169 struct scatterlist key_sg; 170 unsigned int key_len; 171 u8 key[AES_MAX_KEY_SIZE]; 172 }; 173 174 struct ccp_des3_req_ctx { 175 struct scatterlist iv_sg; 176 u8 iv[AES_BLOCK_SIZE]; 177 178 struct ccp_cmd cmd; 179 }; 180 181 /* SHA-related defines 182 * These values must be large enough to accommodate any variant 183 */ 184 #define MAX_SHA_CONTEXT_SIZE SHA512_DIGEST_SIZE 185 #define MAX_SHA_BLOCK_SIZE SHA512_BLOCK_SIZE 186 187 struct ccp_sha_ctx { 188 struct scatterlist opad_sg; 189 unsigned int opad_count; 190 191 unsigned int key_len; 192 u8 key[MAX_SHA_BLOCK_SIZE]; 193 u8 ipad[MAX_SHA_BLOCK_SIZE]; 194 u8 opad[MAX_SHA_BLOCK_SIZE]; 195 struct crypto_shash *hmac_tfm; 196 }; 197 198 struct ccp_sha_req_ctx { 199 enum ccp_sha_type type; 200 201 u64 msg_bits; 202 203 unsigned int first; 204 unsigned int final; 205 206 struct scatterlist *src; 207 unsigned int nbytes; 208 209 u64 hash_cnt; 210 unsigned int hash_rem; 211 212 struct sg_table data_sg; 213 214 struct scatterlist ctx_sg; 215 u8 ctx[MAX_SHA_CONTEXT_SIZE]; 216 217 struct scatterlist buf_sg; 218 unsigned int buf_count; 219 u8 buf[MAX_SHA_BLOCK_SIZE]; 220 221 /* CCP driver command */ 222 struct ccp_cmd cmd; 223 }; 224 225 struct ccp_sha_exp_ctx { 226 enum ccp_sha_type type; 227 228 u64 msg_bits; 229 230 unsigned int first; 231 232 u8 ctx[MAX_SHA_CONTEXT_SIZE]; 233 234 unsigned int buf_count; 235 u8 buf[MAX_SHA_BLOCK_SIZE]; 236 }; 237 238 /***** RSA related defines *****/ 239 240 struct ccp_rsa_ctx { 241 unsigned int key_len; /* in bits */ 242 struct scatterlist e_sg; 243 u8 *e_buf; 244 unsigned int e_len; 245 struct scatterlist n_sg; 246 u8 *n_buf; 247 unsigned int n_len; 248 struct scatterlist d_sg; 249 u8 *d_buf; 250 unsigned int d_len; 251 }; 252 253 struct ccp_rsa_req_ctx { 254 struct ccp_cmd cmd; 255 }; 256 257 #define CCP_RSA_MAXMOD (4 * 1024 / 8) 258 #define CCP5_RSA_MAXMOD (16 * 1024 / 8) 259 260 /***** Common Context Structure *****/ 261 struct ccp_ctx { 262 int (*complete)(struct crypto_async_request *req, int ret); 263 264 union { 265 struct ccp_aes_ctx aes; 266 struct ccp_rsa_ctx rsa; 267 struct ccp_sha_ctx sha; 268 struct ccp_des3_ctx des3; 269 } u; 270 }; 271 272 int ccp_crypto_enqueue_request(struct crypto_async_request *req, 273 struct ccp_cmd *cmd); 274 struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table, 275 struct scatterlist *sg_add); 276 277 int ccp_register_aes_algs(struct list_head *head); 278 int ccp_register_aes_cmac_algs(struct list_head *head); 279 int ccp_register_aes_xts_algs(struct list_head *head); 280 int ccp_register_aes_aeads(struct list_head *head); 281 int ccp_register_sha_algs(struct list_head *head); 282 int ccp_register_des3_algs(struct list_head *head); 283 int ccp_register_rsa_algs(struct list_head *head); 284 285 #endif 286