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 <crypto/algapi.h>
21 #include <crypto/aes.h>
22 #include <crypto/internal/aead.h>
23 #include <crypto/aead.h>
24 #include <crypto/ctr.h>
25 #include <crypto/hash.h>
26 #include <crypto/sha.h>
28 #define CCP_LOG_LEVEL KERN_INFO
30 #define CCP_CRA_PRIORITY 300
32 struct ccp_crypto_ablkcipher_alg {
33 struct list_head entry;
37 struct crypto_alg alg;
40 struct ccp_crypto_aead {
41 struct list_head entry;
48 struct ccp_crypto_ahash_alg {
49 struct list_head entry;
55 /* Child algorithm used for HMAC, CMAC, etc */
56 char child_alg[CRYPTO_MAX_ALG_NAME];
61 static inline struct ccp_crypto_ablkcipher_alg *
62 ccp_crypto_ablkcipher_alg(struct crypto_tfm *tfm)
64 struct crypto_alg *alg = tfm->__crt_alg;
66 return container_of(alg, struct ccp_crypto_ablkcipher_alg, alg);
69 static inline struct ccp_crypto_ahash_alg *
70 ccp_crypto_ahash_alg(struct crypto_tfm *tfm)
72 struct crypto_alg *alg = tfm->__crt_alg;
73 struct ahash_alg *ahash_alg;
75 ahash_alg = container_of(alg, struct ahash_alg, halg.base);
77 return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg);
80 /***** AES related defines *****/
82 /* Fallback cipher for XTS with unsupported unit sizes */
83 struct crypto_skcipher *tfm_skcipher;
85 /* Cipher used to generate CMAC K1/K2 keys */
86 struct crypto_cipher *tfm_cipher;
88 enum ccp_engine engine;
89 enum ccp_aes_type type;
90 enum ccp_aes_mode mode;
92 struct scatterlist key_sg;
94 u8 key[AES_MAX_KEY_SIZE];
96 u8 nonce[CTR_RFC3686_NONCE_SIZE];
98 /* CMAC key structures */
99 struct scatterlist k1_sg;
100 struct scatterlist k2_sg;
102 u8 k1[AES_BLOCK_SIZE];
103 u8 k2[AES_BLOCK_SIZE];
106 struct ccp_aes_req_ctx {
107 struct scatterlist iv_sg;
108 u8 iv[AES_BLOCK_SIZE];
110 struct scatterlist tag_sg;
111 u8 tag[AES_BLOCK_SIZE];
113 /* Fields used for RFC3686 requests */
115 u8 rfc3686_iv[AES_BLOCK_SIZE];
120 struct ccp_aes_cmac_req_ctx {
121 unsigned int null_msg;
124 struct scatterlist *src;
128 unsigned int hash_rem;
130 struct sg_table data_sg;
132 struct scatterlist iv_sg;
133 u8 iv[AES_BLOCK_SIZE];
135 struct scatterlist buf_sg;
136 unsigned int buf_count;
137 u8 buf[AES_BLOCK_SIZE];
139 struct scatterlist pad_sg;
140 unsigned int pad_count;
141 u8 pad[AES_BLOCK_SIZE];
146 struct ccp_aes_cmac_exp_ctx {
147 unsigned int null_msg;
149 u8 iv[AES_BLOCK_SIZE];
151 unsigned int buf_count;
152 u8 buf[AES_BLOCK_SIZE];
155 /***** 3DES related defines *****/
156 struct ccp_des3_ctx {
157 enum ccp_engine engine;
158 enum ccp_des3_type type;
159 enum ccp_des3_mode mode;
161 struct scatterlist key_sg;
162 unsigned int key_len;
163 u8 key[AES_MAX_KEY_SIZE];
166 struct ccp_des3_req_ctx {
167 struct scatterlist iv_sg;
168 u8 iv[AES_BLOCK_SIZE];
173 /* SHA-related defines
174 * These values must be large enough to accommodate any variant
176 #define MAX_SHA_CONTEXT_SIZE SHA512_DIGEST_SIZE
177 #define MAX_SHA_BLOCK_SIZE SHA512_BLOCK_SIZE
180 struct scatterlist opad_sg;
181 unsigned int opad_count;
183 unsigned int key_len;
184 u8 key[MAX_SHA_BLOCK_SIZE];
185 u8 ipad[MAX_SHA_BLOCK_SIZE];
186 u8 opad[MAX_SHA_BLOCK_SIZE];
187 struct crypto_shash *hmac_tfm;
190 struct ccp_sha_req_ctx {
191 enum ccp_sha_type type;
198 struct scatterlist *src;
202 unsigned int hash_rem;
204 struct sg_table data_sg;
206 struct scatterlist ctx_sg;
207 u8 ctx[MAX_SHA_CONTEXT_SIZE];
209 struct scatterlist buf_sg;
210 unsigned int buf_count;
211 u8 buf[MAX_SHA_BLOCK_SIZE];
213 /* CCP driver command */
217 struct ccp_sha_exp_ctx {
218 enum ccp_sha_type type;
224 u8 ctx[MAX_SHA_CONTEXT_SIZE];
226 unsigned int buf_count;
227 u8 buf[MAX_SHA_BLOCK_SIZE];
230 /***** Common Context Structure *****/
232 int (*complete)(struct crypto_async_request *req, int ret);
235 struct ccp_aes_ctx aes;
236 struct ccp_sha_ctx sha;
237 struct ccp_des3_ctx des3;
241 int ccp_crypto_enqueue_request(struct crypto_async_request *req,
242 struct ccp_cmd *cmd);
243 struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,
244 struct scatterlist *sg_add);
246 int ccp_register_aes_algs(struct list_head *head);
247 int ccp_register_aes_cmac_algs(struct list_head *head);
248 int ccp_register_aes_xts_algs(struct list_head *head);
249 int ccp_register_aes_aeads(struct list_head *head);
250 int ccp_register_sha_algs(struct list_head *head);
251 int ccp_register_des3_algs(struct list_head *head);