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/sha1.h>
23#include <crypto/sha2.h>
24#include <crypto/akcipher.h>
25#include <crypto/skcipher.h>
26#include <crypto/internal/rsa.h>
27
28/* We want the module name in front of our messages */
29#undef pr_fmt
30#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
32#define CCP_LOG_LEVEL KERN_INFO
33
34#define CCP_CRA_PRIORITY 300
35
36struct ccp_crypto_skcipher_alg {
37 struct list_head entry;
38
39 u32 mode;
40
41 struct skcipher_alg alg;
42};
43
44struct ccp_crypto_aead {
45 struct list_head entry;
46
47 u32 mode;
48
49 struct aead_alg alg;
50};
51
52struct ccp_crypto_ahash_alg {
53 struct list_head entry;
54
55 const __be32 *init;
56 u32 type;
57 u32 mode;
58
59 /* Child algorithm used for HMAC, CMAC, etc */
60 char child_alg[CRYPTO_MAX_ALG_NAME];
61
62 struct ahash_alg alg;
63};
64
65struct ccp_crypto_akcipher_alg {
66 struct list_head entry;
67
68 struct akcipher_alg alg;
69};
70
71static inline struct ccp_crypto_skcipher_alg *
72 ccp_crypto_skcipher_alg(struct crypto_skcipher *tfm)
73{
74 struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
75
76 return container_of(alg, struct ccp_crypto_skcipher_alg, alg);
77}
78
79static inline struct ccp_crypto_ahash_alg *
80 ccp_crypto_ahash_alg(struct crypto_tfm *tfm)
81{
82 struct crypto_alg *alg = tfm->__crt_alg;
83 struct ahash_alg *ahash_alg;
84
85 ahash_alg = container_of(alg, struct ahash_alg, halg.base);
86
87 return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg);
88}
89
90/***** AES related defines *****/
91struct ccp_aes_ctx {
92 /* Fallback cipher for XTS with unsupported unit sizes */
93 struct crypto_skcipher *tfm_skcipher;
94
95 enum ccp_engine engine;
96 enum ccp_aes_type type;
97 enum ccp_aes_mode mode;
98
99 struct scatterlist key_sg;
100 unsigned int key_len;
101 u8 key[AES_MAX_KEY_SIZE * 2];
102
103 u8 nonce[CTR_RFC3686_NONCE_SIZE];
104
105 /* CMAC key structures */
106 struct scatterlist k1_sg;
107 struct scatterlist k2_sg;
108 unsigned int kn_len;
109 u8 k1[AES_BLOCK_SIZE];
110 u8 k2[AES_BLOCK_SIZE];
111};
112
113struct ccp_aes_req_ctx {
114 struct scatterlist iv_sg;
115 u8 iv[AES_BLOCK_SIZE];
116
117 struct scatterlist tag_sg;
118 u8 tag[AES_BLOCK_SIZE];
119
120 /* Fields used for RFC3686 requests */
121 u8 *rfc3686_info;
122 u8 rfc3686_iv[AES_BLOCK_SIZE];
123
124 struct ccp_cmd cmd;
125
126 struct skcipher_request fallback_req; // keep at the end
127};
128
129struct ccp_aes_cmac_req_ctx {
130 unsigned int null_msg;
131 unsigned int final;
132
133 struct scatterlist *src;
134 unsigned int nbytes;
135
136 u64 hash_cnt;
137 unsigned int hash_rem;
138
139 struct sg_table data_sg;
140
141 struct scatterlist iv_sg;
142 u8 iv[AES_BLOCK_SIZE];
143
144 struct scatterlist buf_sg;
145 unsigned int buf_count;
146 u8 buf[AES_BLOCK_SIZE];
147
148 struct scatterlist pad_sg;
149 unsigned int pad_count;
150 u8 pad[AES_BLOCK_SIZE];
151
152 struct ccp_cmd cmd;
153};
154
155struct ccp_aes_cmac_exp_ctx {
156 unsigned int null_msg;
157
158 u8 iv[AES_BLOCK_SIZE];
159
160 unsigned int buf_count;
161 u8 buf[AES_BLOCK_SIZE];
162};
163
164/***** 3DES related defines *****/
165struct ccp_des3_ctx {
166 enum ccp_engine engine;
167 enum ccp_des3_type type;
168 enum ccp_des3_mode mode;
169
170 struct scatterlist key_sg;
171 unsigned int key_len;
172 u8 key[AES_MAX_KEY_SIZE];
173};
174
175struct ccp_des3_req_ctx {
176 struct scatterlist iv_sg;
177 u8 iv[AES_BLOCK_SIZE];
178
179 struct ccp_cmd cmd;
180};
181
182/* SHA-related defines
183 * These values must be large enough to accommodate any variant
184 */
185#define MAX_SHA_CONTEXT_SIZE SHA512_DIGEST_SIZE
186#define MAX_SHA_BLOCK_SIZE SHA512_BLOCK_SIZE
187
188struct ccp_sha_ctx {
189 struct scatterlist opad_sg;
190 unsigned int opad_count;
191
192 unsigned int key_len;
193 u8 key[MAX_SHA_BLOCK_SIZE];
194 u8 ipad[MAX_SHA_BLOCK_SIZE];
195 u8 opad[MAX_SHA_BLOCK_SIZE];
196 struct crypto_shash *hmac_tfm;
197};
198
199struct ccp_sha_req_ctx {
200 enum ccp_sha_type type;
201
202 u64 msg_bits;
203
204 unsigned int first;
205 unsigned int final;
206
207 struct scatterlist *src;
208 unsigned int nbytes;
209
210 u64 hash_cnt;
211 unsigned int hash_rem;
212
213 struct sg_table data_sg;
214
215 struct scatterlist ctx_sg;
216 u8 ctx[MAX_SHA_CONTEXT_SIZE];
217
218 struct scatterlist buf_sg;
219 unsigned int buf_count;
220 u8 buf[MAX_SHA_BLOCK_SIZE];
221
222 /* CCP driver command */
223 struct ccp_cmd cmd;
224};
225
226struct ccp_sha_exp_ctx {
227 enum ccp_sha_type type;
228
229 u64 msg_bits;
230
231 unsigned int first;
232
233 u8 ctx[MAX_SHA_CONTEXT_SIZE];
234
235 unsigned int buf_count;
236 u8 buf[MAX_SHA_BLOCK_SIZE];
237};
238
239/***** RSA related defines *****/
240
241struct ccp_rsa_ctx {
242 unsigned int key_len; /* in bits */
243 struct scatterlist e_sg;
244 u8 *e_buf;
245 unsigned int e_len;
246 struct scatterlist n_sg;
247 u8 *n_buf;
248 unsigned int n_len;
249 struct scatterlist d_sg;
250 u8 *d_buf;
251 unsigned int d_len;
252};
253
254struct ccp_rsa_req_ctx {
255 struct ccp_cmd cmd;
256};
257
258#define CCP_RSA_MAXMOD (4 * 1024 / 8)
259#define CCP5_RSA_MAXMOD (16 * 1024 / 8)
260
261/***** Common Context Structure *****/
262struct ccp_ctx {
263 int (*complete)(struct crypto_async_request *req, int ret);
264
265 union {
266 struct ccp_aes_ctx aes;
267 struct ccp_rsa_ctx rsa;
268 struct ccp_sha_ctx sha;
269 struct ccp_des3_ctx des3;
270 } u;
271};
272
273int ccp_crypto_enqueue_request(struct crypto_async_request *req,
274 struct ccp_cmd *cmd);
275struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,
276 struct scatterlist *sg_add);
277
278int ccp_register_aes_algs(struct list_head *head);
279int ccp_register_aes_cmac_algs(struct list_head *head);
280int ccp_register_aes_xts_algs(struct list_head *head);
281int ccp_register_aes_aeads(struct list_head *head);
282int ccp_register_sha_algs(struct list_head *head);
283int ccp_register_des3_algs(struct list_head *head);
284int ccp_register_rsa_algs(struct list_head *head);
285
286#endif
287

source code of linux/drivers/crypto/ccp/ccp-crypto.h