1/* SPDX-License-Identifier: GPL-2.0 */ 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/internal/rsa.h> 25 26/* We want the module name in front of our messages */ 27#undef pr_fmt 28#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 29 30#define CCP_LOG_LEVEL KERN_INFO 31 32#define CCP_CRA_PRIORITY 300 33 34struct ccp_crypto_ablkcipher_alg { 35 struct list_head entry; 36 37 u32 mode; 38 39 struct crypto_alg alg; 40}; 41 42struct ccp_crypto_aead { 43 struct list_head entry; 44 45 u32 mode; 46 47 struct aead_alg alg; 48}; 49 50struct ccp_crypto_ahash_alg { 51 struct list_head entry; 52 53 const __be32 *init; 54 u32 type; 55 u32 mode; 56 57 /* Child algorithm used for HMAC, CMAC, etc */ 58 char child_alg[CRYPTO_MAX_ALG_NAME]; 59 60 struct ahash_alg alg; 61}; 62 63struct ccp_crypto_akcipher_alg { 64 struct list_head entry; 65 66 struct akcipher_alg alg; 67}; 68 69static inline struct ccp_crypto_ablkcipher_alg * 70 ccp_crypto_ablkcipher_alg(struct crypto_tfm *tfm) 71{ 72 struct crypto_alg *alg = tfm->__crt_alg; 73 74 return container_of(alg, struct ccp_crypto_ablkcipher_alg, alg); 75} 76 77static inline struct ccp_crypto_ahash_alg * 78 ccp_crypto_ahash_alg(struct crypto_tfm *tfm) 79{ 80 struct crypto_alg *alg = tfm->__crt_alg; 81 struct ahash_alg *ahash_alg; 82 83 ahash_alg = container_of(alg, struct ahash_alg, halg.base); 84 85 return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg); 86} 87 88/***** AES related defines *****/ 89struct ccp_aes_ctx { 90 /* Fallback cipher for XTS with unsupported unit sizes */ 91 struct crypto_sync_skcipher *tfm_skcipher; 92 93 /* Cipher used to generate CMAC K1/K2 keys */ 94 struct crypto_cipher *tfm_cipher; 95 96 enum ccp_engine engine; 97 enum ccp_aes_type type; 98 enum ccp_aes_mode mode; 99 100 struct scatterlist key_sg; 101 unsigned int key_len; 102 u8 key[AES_MAX_KEY_SIZE * 2]; 103 104 u8 nonce[CTR_RFC3686_NONCE_SIZE]; 105 106 /* CMAC key structures */ 107 struct scatterlist k1_sg; 108 struct scatterlist k2_sg; 109 unsigned int kn_len; 110 u8 k1[AES_BLOCK_SIZE]; 111 u8 k2[AES_BLOCK_SIZE]; 112}; 113 114struct ccp_aes_req_ctx { 115 struct scatterlist iv_sg; 116 u8 iv[AES_BLOCK_SIZE]; 117 118 struct scatterlist tag_sg; 119 u8 tag[AES_BLOCK_SIZE]; 120 121 /* Fields used for RFC3686 requests */ 122 u8 *rfc3686_info; 123 u8 rfc3686_iv[AES_BLOCK_SIZE]; 124 125 struct ccp_cmd cmd; 126}; 127 128struct 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 154struct 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 *****/ 164struct 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 174struct 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 187struct 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 198struct 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 225struct 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 240struct 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 253struct 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 *****/ 261struct 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 272int ccp_crypto_enqueue_request(struct crypto_async_request *req, 273 struct ccp_cmd *cmd); 274struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table, 275 struct scatterlist *sg_add); 276 277int ccp_register_aes_algs(struct list_head *head); 278int ccp_register_aes_cmac_algs(struct list_head *head); 279int ccp_register_aes_xts_algs(struct list_head *head); 280int ccp_register_aes_aeads(struct list_head *head); 281int ccp_register_sha_algs(struct list_head *head); 282int ccp_register_des3_algs(struct list_head *head); 283int ccp_register_rsa_algs(struct list_head *head); 284 285#endif 286