2 * AMD Cryptographic Coprocessor (CCP) crypto API support
4 * Copyright (C) 2013 Advanced Micro Devices, Inc.
6 * Author: Tom Lendacky <thomas.lendacky@amd.com>
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.
13 #ifndef __CCP_CRYPTO_H__
14 #define __CCP_CRYPTO_H__
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>
27 #define CCP_CRA_PRIORITY 300
29 struct ccp_crypto_ablkcipher_alg {
30 struct list_head entry;
34 struct crypto_alg alg;
37 struct ccp_crypto_ahash_alg {
38 struct list_head entry;
44 /* Child algorithm used for HMAC, CMAC, etc */
45 char child_alg[CRYPTO_MAX_ALG_NAME];
50 static inline struct ccp_crypto_ablkcipher_alg *
51 ccp_crypto_ablkcipher_alg(struct crypto_tfm *tfm)
53 struct crypto_alg *alg = tfm->__crt_alg;
55 return container_of(alg, struct ccp_crypto_ablkcipher_alg, alg);
58 static inline struct ccp_crypto_ahash_alg *
59 ccp_crypto_ahash_alg(struct crypto_tfm *tfm)
61 struct crypto_alg *alg = tfm->__crt_alg;
62 struct ahash_alg *ahash_alg;
64 ahash_alg = container_of(alg, struct ahash_alg, halg.base);
66 return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg);
69 /***** AES related defines *****/
71 /* Fallback cipher for XTS with unsupported unit sizes */
72 struct crypto_ablkcipher *tfm_ablkcipher;
74 /* Cipher used to generate CMAC K1/K2 keys */
75 struct crypto_cipher *tfm_cipher;
77 enum ccp_engine engine;
78 enum ccp_aes_type type;
79 enum ccp_aes_mode mode;
81 struct scatterlist key_sg;
83 u8 key[AES_MAX_KEY_SIZE];
85 u8 nonce[CTR_RFC3686_NONCE_SIZE];
87 /* CMAC key structures */
88 struct scatterlist k1_sg;
89 struct scatterlist k2_sg;
91 u8 k1[AES_BLOCK_SIZE];
92 u8 k2[AES_BLOCK_SIZE];
95 struct ccp_aes_req_ctx {
96 struct scatterlist iv_sg;
97 u8 iv[AES_BLOCK_SIZE];
99 /* Fields used for RFC3686 requests */
101 u8 rfc3686_iv[AES_BLOCK_SIZE];
106 struct ccp_aes_cmac_req_ctx {
107 unsigned int null_msg;
110 struct scatterlist *src;
114 unsigned int hash_rem;
116 struct sg_table data_sg;
118 struct scatterlist iv_sg;
119 u8 iv[AES_BLOCK_SIZE];
121 struct scatterlist buf_sg;
122 unsigned int buf_count;
123 u8 buf[AES_BLOCK_SIZE];
125 struct scatterlist pad_sg;
126 unsigned int pad_count;
127 u8 pad[AES_BLOCK_SIZE];
132 /***** SHA related defines *****/
133 #define MAX_SHA_CONTEXT_SIZE SHA256_DIGEST_SIZE
134 #define MAX_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE
137 struct scatterlist opad_sg;
138 unsigned int opad_count;
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;
147 struct ccp_sha_req_ctx {
148 enum ccp_sha_type type;
155 struct scatterlist *src;
159 unsigned int hash_rem;
161 struct sg_table data_sg;
163 struct scatterlist ctx_sg;
164 u8 ctx[MAX_SHA_CONTEXT_SIZE];
166 struct scatterlist buf_sg;
167 unsigned int buf_count;
168 u8 buf[MAX_SHA_BLOCK_SIZE];
170 /* CCP driver command */
174 /***** Common Context Structure *****/
176 int (*complete)(struct crypto_async_request *req, int ret);
179 struct ccp_aes_ctx aes;
180 struct ccp_sha_ctx sha;
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);
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);