drivers/crypto/ccp/ccp-crypto.h

   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
  17 #include <linux/list.h>
  18 #include <linux/wait.h>
  19 #include <linux/pci.h>
  20 #include <linux/ccp.h>
  21 #include <linux/crypto.h>
  22 #include <crypto/algapi.h>
  23 #include <crypto/aes.h>
  24 #include <crypto/ctr.h>
  25 #include <crypto/hash.h>
  26 #include <crypto/sha.h>
  27
  28
  29 #define CCP_CRA_PRIORITY        300
  30
  31 struct ccp_crypto_ablkcipher_alg {
  32         struct list_head entry;
  33
  34         u32 mode;
  35
  36         struct crypto_alg alg;
  37 };
  38
  39 struct ccp_crypto_ahash_alg {
  40         struct list_head entry;
  41
  42         const __be32 *init;
  43         u32 type;
  44         u32 mode;
  45
  46         /* Child algorithm used for HMAC, CMAC, etc */
  47         char child_alg[CRYPTO_MAX_ALG_NAME];
  48
  49         struct ahash_alg alg;
  50 };
  51
  52 static inline struct ccp_crypto_ablkcipher_alg *
  53         ccp_crypto_ablkcipher_alg(struct crypto_tfm *tfm)
  54 {
  55         struct crypto_alg *alg = tfm->__crt_alg;
  56
  57         return container_of(alg, struct ccp_crypto_ablkcipher_alg, alg);
  58 }
  59
  60 static inline struct ccp_crypto_ahash_alg *
  61         ccp_crypto_ahash_alg(struct crypto_tfm *tfm)
  62 {
  63         struct crypto_alg *alg = tfm->__crt_alg;
  64         struct ahash_alg *ahash_alg;
  65
  66         ahash_alg = container_of(alg, struct ahash_alg, halg.base);
  67
  68         return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg);
  69 }
  70
  71
  72 /***** AES related defines *****/
  73 struct ccp_aes_ctx {
  74         /* Fallback cipher for XTS with unsupported unit sizes */
  75         struct crypto_ablkcipher *tfm_ablkcipher;
  76
  77         /* Cipher used to generate CMAC K1/K2 keys */
  78         struct crypto_cipher *tfm_cipher;
  79
  80         enum ccp_engine engine;
  81         enum ccp_aes_type type;
  82         enum ccp_aes_mode mode;
  83
  84         struct scatterlist key_sg;
  85         unsigned int key_len;
  86         u8 key[AES_MAX_KEY_SIZE];
  87
  88         u8 nonce[CTR_RFC3686_NONCE_SIZE];
  89
  90         /* CMAC key structures */
  91         struct scatterlist k1_sg;
  92         struct scatterlist k2_sg;
  93         unsigned int kn_len;
  94         u8 k1[AES_BLOCK_SIZE];
  95         u8 k2[AES_BLOCK_SIZE];
  96 };
  97
  98 struct ccp_aes_req_ctx {
  99         struct scatterlist iv_sg;
 100         u8 iv[AES_BLOCK_SIZE];
 101
 102         /* Fields used for RFC3686 requests */
 103         u8 *rfc3686_info;
 104         u8 rfc3686_iv[AES_BLOCK_SIZE];
 105
 106         struct ccp_cmd cmd;
 107 };
 108
 109 struct ccp_aes_cmac_req_ctx {
 110         unsigned int null_msg;
 111         unsigned int final;
 112
 113         struct scatterlist *src;
 114         unsigned int nbytes;
 115
 116         u64 hash_cnt;
 117         unsigned int hash_rem;
 118
 119         struct sg_table data_sg;
 120
 121         struct scatterlist iv_sg;
 122         u8 iv[AES_BLOCK_SIZE];
 123
 124         struct scatterlist buf_sg;
 125         unsigned int buf_count;
 126         u8 buf[AES_BLOCK_SIZE];
 127
 128         struct scatterlist pad_sg;
 129         unsigned int pad_count;
 130         u8 pad[AES_BLOCK_SIZE];
 131
 132         struct ccp_cmd cmd;
 133 };
 134
 135 /***** SHA related defines *****/
 136 #define MAX_SHA_CONTEXT_SIZE    SHA256_DIGEST_SIZE
 137 #define MAX_SHA_BLOCK_SIZE      SHA256_BLOCK_SIZE
 138
 139 struct ccp_sha_ctx {
 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_ahash *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         /* HMAC support field */
 171         struct scatterlist pad_sg;
 172
 173         /* CCP driver command */
 174         struct ccp_cmd cmd;
 175 };
 176
 177 /***** Common Context Structure *****/
 178 struct ccp_ctx {
 179         int (*complete)(struct crypto_async_request *req, int ret);
 180
 181         union {
 182                 struct ccp_aes_ctx aes;
 183                 struct ccp_sha_ctx sha;
 184         } u;
 185 };
 186
 187 int ccp_crypto_enqueue_request(struct crypto_async_request *req,
 188                                struct ccp_cmd *cmd);
 189 struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,
 190                                             struct scatterlist *sg_add);
 191
 192 int ccp_register_aes_algs(struct list_head *head);
 193 int ccp_register_aes_cmac_algs(struct list_head *head);
 194 int ccp_register_aes_xts_algs(struct list_head *head);
 195 int ccp_register_sha_algs(struct list_head *head);
 196
 197 #endif