1 /* SPDX-License-Identifier: GPL-2.0-or-later * 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* 2 /*
3 * Scatterlist Cryptographic API. 3 * Scatterlist Cryptographic API.
4 * 4 *
5 * Copyright (c) 2002 James Morris <jmorris@in 5 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
6 * Copyright (c) 2002 David S. Miller (davem@r 6 * Copyright (c) 2002 David S. Miller (davem@redhat.com)
7 * Copyright (c) 2005 Herbert Xu <herbert@gond 7 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
8 * 8 *
9 * Portions derived from Cryptoapi, by Alexand 9 * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>
10 * and Nettle, by Niels Möller. 10 * and Nettle, by Niels Möller.
11 */ 11 */
12 #ifndef _LINUX_CRYPTO_H 12 #ifndef _LINUX_CRYPTO_H
13 #define _LINUX_CRYPTO_H 13 #define _LINUX_CRYPTO_H
14 14
15 #include <linux/completion.h> !! 15 #include <linux/atomic.h>
16 #include <linux/refcount.h> !! 16 #include <linux/kernel.h>
>> 17 #include <linux/list.h>
>> 18 #include <linux/bug.h>
17 #include <linux/slab.h> 19 #include <linux/slab.h>
18 #include <linux/types.h> !! 20 #include <linux/string.h>
>> 21 #include <linux/uaccess.h>
>> 22 #include <linux/completion.h>
>> 23
>> 24 /*
>> 25 * Autoloaded crypto modules should only use a prefixed name to avoid allowing
>> 26 * arbitrary modules to be loaded. Loading from userspace may still need the
>> 27 * unprefixed names, so retains those aliases as well.
>> 28 * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3
>> 29 * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro
>> 30 * expands twice on the same line. Instead, use a separate base name for the
>> 31 * alias.
>> 32 */
>> 33 #define MODULE_ALIAS_CRYPTO(name) \
>> 34 __MODULE_INFO(alias, alias_userspace, name); \
>> 35 __MODULE_INFO(alias, alias_crypto, "crypto-" name)
19 36
20 /* 37 /*
21 * Algorithm masks and types. 38 * Algorithm masks and types.
22 */ 39 */
23 #define CRYPTO_ALG_TYPE_MASK 0x0000 40 #define CRYPTO_ALG_TYPE_MASK 0x0000000f
24 #define CRYPTO_ALG_TYPE_CIPHER 0x0000 41 #define CRYPTO_ALG_TYPE_CIPHER 0x00000001
25 #define CRYPTO_ALG_TYPE_COMPRESS 0x0000 42 #define CRYPTO_ALG_TYPE_COMPRESS 0x00000002
26 #define CRYPTO_ALG_TYPE_AEAD 0x0000 43 #define CRYPTO_ALG_TYPE_AEAD 0x00000003
27 #define CRYPTO_ALG_TYPE_LSKCIPHER 0x0000 <<
28 #define CRYPTO_ALG_TYPE_SKCIPHER 0x0000 44 #define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005
29 #define CRYPTO_ALG_TYPE_AKCIPHER 0x0000 <<
30 #define CRYPTO_ALG_TYPE_SIG 0x0000 <<
31 #define CRYPTO_ALG_TYPE_KPP 0x0000 45 #define CRYPTO_ALG_TYPE_KPP 0x00000008
32 #define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000 46 #define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a
33 #define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000 47 #define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000000b
34 #define CRYPTO_ALG_TYPE_RNG 0x0000 48 #define CRYPTO_ALG_TYPE_RNG 0x0000000c
>> 49 #define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d
35 #define CRYPTO_ALG_TYPE_HASH 0x0000 50 #define CRYPTO_ALG_TYPE_HASH 0x0000000e
36 #define CRYPTO_ALG_TYPE_SHASH 0x0000 51 #define CRYPTO_ALG_TYPE_SHASH 0x0000000e
37 #define CRYPTO_ALG_TYPE_AHASH 0x0000 52 #define CRYPTO_ALG_TYPE_AHASH 0x0000000f
38 53
>> 54 #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e
>> 55 #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e
39 #define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000 56 #define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e
40 57
41 #define CRYPTO_ALG_LARVAL 0x0000 58 #define CRYPTO_ALG_LARVAL 0x00000010
42 #define CRYPTO_ALG_DEAD 0x0000 59 #define CRYPTO_ALG_DEAD 0x00000020
43 #define CRYPTO_ALG_DYING 0x0000 60 #define CRYPTO_ALG_DYING 0x00000040
44 #define CRYPTO_ALG_ASYNC 0x0000 61 #define CRYPTO_ALG_ASYNC 0x00000080
45 62
46 /* 63 /*
47 * Set if the algorithm (or an algorithm which !! 64 * Set this bit if and only if the algorithm requires another algorithm of
48 * algorithm of the same type to handle corner !! 65 * the same type to handle corner cases.
49 */ 66 */
50 #define CRYPTO_ALG_NEED_FALLBACK 0x0000 67 #define CRYPTO_ALG_NEED_FALLBACK 0x00000100
51 68
52 /* 69 /*
53 * Set if the algorithm has passed automated r 70 * Set if the algorithm has passed automated run-time testing. Note that
54 * if there is no run-time testing for a given 71 * if there is no run-time testing for a given algorithm it is considered
55 * to have passed. 72 * to have passed.
56 */ 73 */
57 74
58 #define CRYPTO_ALG_TESTED 0x0000 75 #define CRYPTO_ALG_TESTED 0x00000400
59 76
60 /* 77 /*
61 * Set if the algorithm is an instance that is 78 * Set if the algorithm is an instance that is built from templates.
62 */ 79 */
63 #define CRYPTO_ALG_INSTANCE 0x0000 80 #define CRYPTO_ALG_INSTANCE 0x00000800
64 81
65 /* Set this bit if the algorithm provided is h 82 /* Set this bit if the algorithm provided is hardware accelerated but
66 * not available to userspace via instruction 83 * not available to userspace via instruction set or so.
67 */ 84 */
68 #define CRYPTO_ALG_KERN_DRIVER_ONLY 0x0000 85 #define CRYPTO_ALG_KERN_DRIVER_ONLY 0x00001000
69 86
70 /* 87 /*
71 * Mark a cipher as a service implementation o 88 * Mark a cipher as a service implementation only usable by another
72 * cipher and never by a normal user of the ke 89 * cipher and never by a normal user of the kernel crypto API
73 */ 90 */
74 #define CRYPTO_ALG_INTERNAL 0x0000 91 #define CRYPTO_ALG_INTERNAL 0x00002000
75 92
76 /* 93 /*
77 * Set if the algorithm has a ->setkey() metho 94 * Set if the algorithm has a ->setkey() method but can be used without
78 * calling it first, i.e. there is a default k 95 * calling it first, i.e. there is a default key.
79 */ 96 */
80 #define CRYPTO_ALG_OPTIONAL_KEY 0x0000 97 #define CRYPTO_ALG_OPTIONAL_KEY 0x00004000
81 98
82 /* 99 /*
83 * Don't trigger module loading 100 * Don't trigger module loading
84 */ 101 */
85 #define CRYPTO_NOLOAD 0x0000 102 #define CRYPTO_NOLOAD 0x00008000
86 103
87 /* 104 /*
88 * The algorithm may allocate memory during re <<
89 * encryption, decryption, or hashing. Users <<
90 * flag unset if they can't handle memory allo <<
91 * <<
92 * This flag is currently only implemented for <<
93 * "aead", "ahash", "shash", and "cipher". Al <<
94 * have this flag set even if they allocate me <<
95 * <<
96 * In some edge cases, algorithms can allocate <<
97 * To avoid these cases, users must obey the f <<
98 * skcipher: <<
99 * - The IV buffer and all scatterlist el <<
100 * algorithm's alignmask. <<
101 * - If the data were to be divided into <<
102 * crypto_skcipher_walksize() (with any <<
103 * chunk can cross a page boundary or a <<
104 * aead: <<
105 * - The IV buffer and all scatterlist el <<
106 * algorithm's alignmask. <<
107 * - The first scatterlist element must c <<
108 * and its pages must be !PageHighMem. <<
109 * - If the plaintext/ciphertext were to <<
110 * crypto_aead_walksize() (with the rem <<
111 * can cross a page boundary or a scatt <<
112 * ahash: <<
113 * - crypto_ahash_finup() must not be use <<
114 * ->finup() natively. <<
115 */ <<
116 #define CRYPTO_ALG_ALLOCATES_MEMORY 0x0001 <<
117 <<
118 /* <<
119 * Mark an algorithm as a service implementati <<
120 * template and never by a normal user of the <<
121 * This is intended to be used by algorithms t <<
122 * not FIPS-approved but may instead be used t <<
123 * a FIPS-approved algorithm (e.g., dh vs. ffd <<
124 */ <<
125 #define CRYPTO_ALG_FIPS_INTERNAL 0x0002 <<
126 <<
127 /* <<
128 * Transform masks and values (for crt_flags). 105 * Transform masks and values (for crt_flags).
129 */ 106 */
130 #define CRYPTO_TFM_NEED_KEY 0x0000 107 #define CRYPTO_TFM_NEED_KEY 0x00000001
131 108
132 #define CRYPTO_TFM_REQ_MASK 0x000f 109 #define CRYPTO_TFM_REQ_MASK 0x000fff00
133 #define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x0000 110 #define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x00000100
134 #define CRYPTO_TFM_REQ_MAY_SLEEP 0x0000 111 #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200
135 #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x0000 112 #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400
136 113
137 /* 114 /*
138 * Miscellaneous stuff. 115 * Miscellaneous stuff.
139 */ 116 */
140 #define CRYPTO_MAX_ALG_NAME 128 117 #define CRYPTO_MAX_ALG_NAME 128
141 118
142 /* 119 /*
143 * The macro CRYPTO_MINALIGN_ATTR (along with 120 * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
144 * declaration) is used to ensure that the cry 121 * declaration) is used to ensure that the crypto_tfm context structure is
145 * aligned correctly for the given architectur 122 * aligned correctly for the given architecture so that there are no alignment
146 * faults for C data types. On architectures !! 123 * faults for C data types. In particular, this is required on platforms such
147 * DMA, such as ARM or arm64, it also takes in !! 124 * as arm where pointers are 32-bit aligned but there are data types such as
148 * that is required to ensure that the context !! 125 * u64 which require 64-bit alignment.
149 * cachelines with the rest of the struct. Thi <<
150 * maintenance for non-coherent DMA (cache inv <<
151 * affect data that may be accessed by the CPU <<
152 */ 126 */
153 #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN 127 #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN
154 128
155 #define CRYPTO_MINALIGN_ATTR __attribute__ ((_ 129 #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
156 130
>> 131 struct scatterlist;
>> 132 struct crypto_async_request;
157 struct crypto_tfm; 133 struct crypto_tfm;
158 struct crypto_type; 134 struct crypto_type;
159 struct module; <<
160 135
161 typedef void (*crypto_completion_t)(void *req, !! 136 typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err);
162 137
163 /** 138 /**
164 * DOC: Block Cipher Context Data Structures 139 * DOC: Block Cipher Context Data Structures
165 * 140 *
166 * These data structures define the operating 141 * These data structures define the operating context for each block cipher
167 * type. 142 * type.
168 */ 143 */
169 144
170 struct crypto_async_request { 145 struct crypto_async_request {
171 struct list_head list; 146 struct list_head list;
172 crypto_completion_t complete; 147 crypto_completion_t complete;
173 void *data; 148 void *data;
174 struct crypto_tfm *tfm; 149 struct crypto_tfm *tfm;
175 150
176 u32 flags; 151 u32 flags;
177 }; 152 };
178 153
179 /** 154 /**
180 * DOC: Block Cipher Algorithm Definitions 155 * DOC: Block Cipher Algorithm Definitions
181 * 156 *
182 * These data structures define modular crypto 157 * These data structures define modular crypto algorithm implementations,
183 * managed via crypto_register_alg() and crypt 158 * managed via crypto_register_alg() and crypto_unregister_alg().
184 */ 159 */
185 160
186 /** 161 /**
187 * struct cipher_alg - single-block symmetric 162 * struct cipher_alg - single-block symmetric ciphers definition
188 * @cia_min_keysize: Minimum key size supporte 163 * @cia_min_keysize: Minimum key size supported by the transformation. This is
189 * the smallest key length s 164 * the smallest key length supported by this transformation
190 * algorithm. This must be s 165 * algorithm. This must be set to one of the pre-defined
191 * values as this is not har 166 * values as this is not hardware specific. Possible values
192 * for this field can be fou 167 * for this field can be found via git grep "_MIN_KEY_SIZE"
193 * include/crypto/ 168 * include/crypto/
194 * @cia_max_keysize: Maximum key size supporte 169 * @cia_max_keysize: Maximum key size supported by the transformation. This is
195 * the largest key length sup 170 * the largest key length supported by this transformation
196 * algorithm. This must be se 171 * algorithm. This must be set to one of the pre-defined values
197 * as this is not hardware sp 172 * as this is not hardware specific. Possible values for this
198 * field can be found via git 173 * field can be found via git grep "_MAX_KEY_SIZE"
199 * include/crypto/ 174 * include/crypto/
200 * @cia_setkey: Set key for the transformation 175 * @cia_setkey: Set key for the transformation. This function is used to either
201 * program a supplied key into th 176 * program a supplied key into the hardware or store the key in the
202 * transformation context for pro 177 * transformation context for programming it later. Note that this
203 * function does modify the trans 178 * function does modify the transformation context. This function
204 * can be called multiple times d 179 * can be called multiple times during the existence of the
205 * transformation object, so one 180 * transformation object, so one must make sure the key is properly
206 * reprogrammed into the hardware 181 * reprogrammed into the hardware. This function is also
207 * responsible for checking the k 182 * responsible for checking the key length for validity.
208 * @cia_encrypt: Encrypt a single block. This 183 * @cia_encrypt: Encrypt a single block. This function is used to encrypt a
209 * single block of data, which m 184 * single block of data, which must be @cra_blocksize big. This
210 * always operates on a full @cr 185 * always operates on a full @cra_blocksize and it is not possible
211 * to encrypt a block of smaller 186 * to encrypt a block of smaller size. The supplied buffers must
212 * therefore also be at least of 187 * therefore also be at least of @cra_blocksize size. Both the
213 * input and output buffers are 188 * input and output buffers are always aligned to @cra_alignmask.
214 * In case either of the input o 189 * In case either of the input or output buffer supplied by user
215 * of the crypto API is not alig 190 * of the crypto API is not aligned to @cra_alignmask, the crypto
216 * API will re-align the buffers 191 * API will re-align the buffers. The re-alignment means that a
217 * new buffer will be allocated, 192 * new buffer will be allocated, the data will be copied into the
218 * new buffer, then the processi 193 * new buffer, then the processing will happen on the new buffer,
219 * then the data will be copied 194 * then the data will be copied back into the original buffer and
220 * finally the new buffer will b 195 * finally the new buffer will be freed. In case a software
221 * fallback was put in place in 196 * fallback was put in place in the @cra_init call, this function
222 * might need to use the fallbac 197 * might need to use the fallback if the algorithm doesn't support
223 * all of the key sizes. In case 198 * all of the key sizes. In case the key was stored in
224 * transformation context, the k 199 * transformation context, the key might need to be re-programmed
225 * into the hardware in this fun 200 * into the hardware in this function. This function shall not
226 * modify the transformation con 201 * modify the transformation context, as this function may be
227 * called in parallel with the s 202 * called in parallel with the same transformation object.
228 * @cia_decrypt: Decrypt a single block. This 203 * @cia_decrypt: Decrypt a single block. This is a reverse counterpart to
229 * @cia_encrypt, and the conditi 204 * @cia_encrypt, and the conditions are exactly the same.
230 * 205 *
231 * All fields are mandatory and must be filled 206 * All fields are mandatory and must be filled.
232 */ 207 */
233 struct cipher_alg { 208 struct cipher_alg {
234 unsigned int cia_min_keysize; 209 unsigned int cia_min_keysize;
235 unsigned int cia_max_keysize; 210 unsigned int cia_max_keysize;
236 int (*cia_setkey)(struct crypto_tfm *t 211 int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,
237 unsigned int keylen) 212 unsigned int keylen);
238 void (*cia_encrypt)(struct crypto_tfm 213 void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
239 void (*cia_decrypt)(struct crypto_tfm 214 void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
240 }; 215 };
241 216
242 /** 217 /**
243 * struct compress_alg - compression/decompres 218 * struct compress_alg - compression/decompression algorithm
244 * @coa_compress: Compress a buffer of specifi 219 * @coa_compress: Compress a buffer of specified length, storing the resulting
245 * data in the specified buffer 220 * data in the specified buffer. Return the length of the
246 * compressed data in dlen. 221 * compressed data in dlen.
247 * @coa_decompress: Decompress the source buff 222 * @coa_decompress: Decompress the source buffer, storing the uncompressed
248 * data in the specified buff 223 * data in the specified buffer. The length of the data is
249 * returned in dlen. 224 * returned in dlen.
250 * 225 *
251 * All fields are mandatory. 226 * All fields are mandatory.
252 */ 227 */
253 struct compress_alg { 228 struct compress_alg {
254 int (*coa_compress)(struct crypto_tfm 229 int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src,
255 unsigned int slen, 230 unsigned int slen, u8 *dst, unsigned int *dlen);
256 int (*coa_decompress)(struct crypto_tf 231 int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src,
257 unsigned int sle 232 unsigned int slen, u8 *dst, unsigned int *dlen);
258 }; 233 };
259 234
>> 235 #ifdef CONFIG_CRYPTO_STATS
>> 236 /*
>> 237 * struct crypto_istat_aead - statistics for AEAD algorithm
>> 238 * @encrypt_cnt: number of encrypt requests
>> 239 * @encrypt_tlen: total data size handled by encrypt requests
>> 240 * @decrypt_cnt: number of decrypt requests
>> 241 * @decrypt_tlen: total data size handled by decrypt requests
>> 242 * @err_cnt: number of error for AEAD requests
>> 243 */
>> 244 struct crypto_istat_aead {
>> 245 atomic64_t encrypt_cnt;
>> 246 atomic64_t encrypt_tlen;
>> 247 atomic64_t decrypt_cnt;
>> 248 atomic64_t decrypt_tlen;
>> 249 atomic64_t err_cnt;
>> 250 };
>> 251
>> 252 /*
>> 253 * struct crypto_istat_akcipher - statistics for akcipher algorithm
>> 254 * @encrypt_cnt: number of encrypt requests
>> 255 * @encrypt_tlen: total data size handled by encrypt requests
>> 256 * @decrypt_cnt: number of decrypt requests
>> 257 * @decrypt_tlen: total data size handled by decrypt requests
>> 258 * @verify_cnt: number of verify operation
>> 259 * @sign_cnt: number of sign requests
>> 260 * @err_cnt: number of error for akcipher requests
>> 261 */
>> 262 struct crypto_istat_akcipher {
>> 263 atomic64_t encrypt_cnt;
>> 264 atomic64_t encrypt_tlen;
>> 265 atomic64_t decrypt_cnt;
>> 266 atomic64_t decrypt_tlen;
>> 267 atomic64_t verify_cnt;
>> 268 atomic64_t sign_cnt;
>> 269 atomic64_t err_cnt;
>> 270 };
>> 271
>> 272 /*
>> 273 * struct crypto_istat_cipher - statistics for cipher algorithm
>> 274 * @encrypt_cnt: number of encrypt requests
>> 275 * @encrypt_tlen: total data size handled by encrypt requests
>> 276 * @decrypt_cnt: number of decrypt requests
>> 277 * @decrypt_tlen: total data size handled by decrypt requests
>> 278 * @err_cnt: number of error for cipher requests
>> 279 */
>> 280 struct crypto_istat_cipher {
>> 281 atomic64_t encrypt_cnt;
>> 282 atomic64_t encrypt_tlen;
>> 283 atomic64_t decrypt_cnt;
>> 284 atomic64_t decrypt_tlen;
>> 285 atomic64_t err_cnt;
>> 286 };
>> 287
>> 288 /*
>> 289 * struct crypto_istat_compress - statistics for compress algorithm
>> 290 * @compress_cnt: number of compress requests
>> 291 * @compress_tlen: total data size handled by compress requests
>> 292 * @decompress_cnt: number of decompress requests
>> 293 * @decompress_tlen: total data size handled by decompress requests
>> 294 * @err_cnt: number of error for compress requests
>> 295 */
>> 296 struct crypto_istat_compress {
>> 297 atomic64_t compress_cnt;
>> 298 atomic64_t compress_tlen;
>> 299 atomic64_t decompress_cnt;
>> 300 atomic64_t decompress_tlen;
>> 301 atomic64_t err_cnt;
>> 302 };
>> 303
>> 304 /*
>> 305 * struct crypto_istat_hash - statistics for has algorithm
>> 306 * @hash_cnt: number of hash requests
>> 307 * @hash_tlen: total data size hashed
>> 308 * @err_cnt: number of error for hash requests
>> 309 */
>> 310 struct crypto_istat_hash {
>> 311 atomic64_t hash_cnt;
>> 312 atomic64_t hash_tlen;
>> 313 atomic64_t err_cnt;
>> 314 };
>> 315
>> 316 /*
>> 317 * struct crypto_istat_kpp - statistics for KPP algorithm
>> 318 * @setsecret_cnt: number of setsecrey operation
>> 319 * @generate_public_key_cnt: number of generate_public_key operation
>> 320 * @compute_shared_secret_cnt: number of compute_shared_secret operation
>> 321 * @err_cnt: number of error for KPP requests
>> 322 */
>> 323 struct crypto_istat_kpp {
>> 324 atomic64_t setsecret_cnt;
>> 325 atomic64_t generate_public_key_cnt;
>> 326 atomic64_t compute_shared_secret_cnt;
>> 327 atomic64_t err_cnt;
>> 328 };
>> 329
>> 330 /*
>> 331 * struct crypto_istat_rng: statistics for RNG algorithm
>> 332 * @generate_cnt: number of RNG generate requests
>> 333 * @generate_tlen: total data size of generated data by the RNG
>> 334 * @seed_cnt: number of times the RNG was seeded
>> 335 * @err_cnt: number of error for RNG requests
>> 336 */
>> 337 struct crypto_istat_rng {
>> 338 atomic64_t generate_cnt;
>> 339 atomic64_t generate_tlen;
>> 340 atomic64_t seed_cnt;
>> 341 atomic64_t err_cnt;
>> 342 };
>> 343 #endif /* CONFIG_CRYPTO_STATS */
>> 344
260 #define cra_cipher cra_u.cipher 345 #define cra_cipher cra_u.cipher
261 #define cra_compress cra_u.compress 346 #define cra_compress cra_u.compress
262 347
263 /** 348 /**
264 * struct crypto_alg - definition of a cryptog 349 * struct crypto_alg - definition of a cryptograpic cipher algorithm
265 * @cra_flags: Flags describing this transform 350 * @cra_flags: Flags describing this transformation. See include/linux/crypto.h
266 * CRYPTO_ALG_* flags for the flag 351 * CRYPTO_ALG_* flags for the flags which go in here. Those are
267 * used for fine-tuning the descri 352 * used for fine-tuning the description of the transformation
268 * algorithm. 353 * algorithm.
269 * @cra_blocksize: Minimum block size of this 354 * @cra_blocksize: Minimum block size of this transformation. The size in bytes
270 * of the smallest possible un 355 * of the smallest possible unit which can be transformed with
271 * this algorithm. The users m 356 * this algorithm. The users must respect this value.
272 * In case of HASH transformat 357 * In case of HASH transformation, it is possible for a smaller
273 * block than @cra_blocksize t 358 * block than @cra_blocksize to be passed to the crypto API for
274 * transformation, in case of 359 * transformation, in case of any other transformation type, an
275 * error will be returned upon 360 * error will be returned upon any attempt to transform smaller
276 * than @cra_blocksize chunks. 361 * than @cra_blocksize chunks.
277 * @cra_ctxsize: Size of the operational conte 362 * @cra_ctxsize: Size of the operational context of the transformation. This
278 * value informs the kernel cryp 363 * value informs the kernel crypto API about the memory size
279 * needed to be allocated for th 364 * needed to be allocated for the transformation context.
280 * @cra_alignmask: For cipher, skcipher, lskci !! 365 * @cra_alignmask: Alignment mask for the input and output data buffer. The data
281 * 1 less than the alignment, !! 366 * buffer containing the input data for the algorithm must be
282 * implementation requires for !! 367 * aligned to this alignment mask. The data buffer for the
283 * the crypto API is invoked w !! 368 * output data must be aligned to this alignment mask. Note that
284 * to this alignment, the cryp !! 369 * the Crypto API will do the re-alignment in software, but
285 * appropriately aligned tempo !! 370 * only under special conditions and there is a performance hit.
286 * the algorithm needs. (For !! 371 * The re-alignment happens at these occasions for different
287 * the algorithm uses the skci !! 372 * @cra_u types: cipher -- For both input data and output data
288 * misalignment handling carri !! 373 * buffer; ahash -- For output hash destination buf; shash --
289 * preferred that algorithms d !! 374 * For output hash destination buf.
290 * Also, crypto API users may !! 375 * This is needed on hardware which is flawed by design and
291 * to the alignmask of the alg !! 376 * cannot pick data from arbitrary addresses.
292 * avoid the API having to rea <<
293 * not supported for hash algo <<
294 * @cra_priority: Priority of this transformat 377 * @cra_priority: Priority of this transformation implementation. In case
295 * multiple transformations wit 378 * multiple transformations with same @cra_name are available to
296 * the Crypto API, the kernel w 379 * the Crypto API, the kernel will use the one with highest
297 * @cra_priority. 380 * @cra_priority.
298 * @cra_name: Generic name (usable by multiple 381 * @cra_name: Generic name (usable by multiple implementations) of the
299 * transformation algorithm. This i 382 * transformation algorithm. This is the name of the transformation
300 * itself. This field is used by th 383 * itself. This field is used by the kernel when looking up the
301 * providers of particular transfor 384 * providers of particular transformation.
302 * @cra_driver_name: Unique name of the transf 385 * @cra_driver_name: Unique name of the transformation provider. This is the
303 * name of the provider of t 386 * name of the provider of the transformation. This can be any
304 * arbitrary value, but in t 387 * arbitrary value, but in the usual case, this contains the
305 * name of the chip or provi 388 * name of the chip or provider and the name of the
306 * transformation algorithm. 389 * transformation algorithm.
307 * @cra_type: Type of the cryptographic transf 390 * @cra_type: Type of the cryptographic transformation. This is a pointer to
308 * struct crypto_type, which implem 391 * struct crypto_type, which implements callbacks common for all
309 * transformation types. There are 392 * transformation types. There are multiple options, such as
310 * &crypto_skcipher_type, &crypto_a 393 * &crypto_skcipher_type, &crypto_ahash_type, &crypto_rng_type.
311 * This field might be empty. In th 394 * This field might be empty. In that case, there are no common
312 * callbacks. This is the case for: 395 * callbacks. This is the case for: cipher, compress, shash.
313 * @cra_u: Callbacks implementing the transfor 396 * @cra_u: Callbacks implementing the transformation. This is a union of
314 * multiple structures. Depending on t 397 * multiple structures. Depending on the type of transformation selected
315 * by @cra_type and @cra_flags above, 398 * by @cra_type and @cra_flags above, the associated structure must be
316 * filled with callbacks. This field m 399 * filled with callbacks. This field might be empty. This is the case
317 * for ahash, shash. 400 * for ahash, shash.
318 * @cra_init: Initialize the cryptographic tra 401 * @cra_init: Initialize the cryptographic transformation object. This function
319 * is used to initialize the crypto 402 * is used to initialize the cryptographic transformation object.
320 * This function is called only onc 403 * This function is called only once at the instantiation time, right
321 * after the transformation context 404 * after the transformation context was allocated. In case the
322 * cryptographic hardware has some 405 * cryptographic hardware has some special requirements which need to
323 * be handled by software, this fun 406 * be handled by software, this function shall check for the precise
324 * requirement of the transformatio 407 * requirement of the transformation and put any software fallbacks
325 * in place. 408 * in place.
326 * @cra_exit: Deinitialize the cryptographic t 409 * @cra_exit: Deinitialize the cryptographic transformation object. This is a
327 * counterpart to @cra_init, used t 410 * counterpart to @cra_init, used to remove various changes set in
328 * @cra_init. 411 * @cra_init.
329 * @cra_u.cipher: Union member which contains 412 * @cra_u.cipher: Union member which contains a single-block symmetric cipher
330 * definition. See @struct @cip 413 * definition. See @struct @cipher_alg.
331 * @cra_u.compress: Union member which contain 414 * @cra_u.compress: Union member which contains a (de)compression algorithm.
332 * See @struct @compress_alg. 415 * See @struct @compress_alg.
333 * @cra_module: Owner of this transformation i 416 * @cra_module: Owner of this transformation implementation. Set to THIS_MODULE
334 * @cra_list: internally used 417 * @cra_list: internally used
335 * @cra_users: internally used 418 * @cra_users: internally used
336 * @cra_refcnt: internally used 419 * @cra_refcnt: internally used
337 * @cra_destroy: internally used 420 * @cra_destroy: internally used
338 * 421 *
>> 422 * @stats: union of all possible crypto_istat_xxx structures
>> 423 * @stats.aead: statistics for AEAD algorithm
>> 424 * @stats.akcipher: statistics for akcipher algorithm
>> 425 * @stats.cipher: statistics for cipher algorithm
>> 426 * @stats.compress: statistics for compress algorithm
>> 427 * @stats.hash: statistics for hash algorithm
>> 428 * @stats.rng: statistics for rng algorithm
>> 429 * @stats.kpp: statistics for KPP algorithm
>> 430 *
339 * The struct crypto_alg describes a generic C 431 * The struct crypto_alg describes a generic Crypto API algorithm and is common
340 * for all of the transformations. Any variabl 432 * for all of the transformations. Any variable not documented here shall not
341 * be used by a cipher implementation as it is 433 * be used by a cipher implementation as it is internal to the Crypto API.
342 */ 434 */
343 struct crypto_alg { 435 struct crypto_alg {
344 struct list_head cra_list; 436 struct list_head cra_list;
345 struct list_head cra_users; 437 struct list_head cra_users;
346 438
347 u32 cra_flags; 439 u32 cra_flags;
348 unsigned int cra_blocksize; 440 unsigned int cra_blocksize;
349 unsigned int cra_ctxsize; 441 unsigned int cra_ctxsize;
350 unsigned int cra_alignmask; 442 unsigned int cra_alignmask;
351 443
352 int cra_priority; 444 int cra_priority;
353 refcount_t cra_refcnt; 445 refcount_t cra_refcnt;
354 446
355 char cra_name[CRYPTO_MAX_ALG_NAME]; 447 char cra_name[CRYPTO_MAX_ALG_NAME];
356 char cra_driver_name[CRYPTO_MAX_ALG_NA 448 char cra_driver_name[CRYPTO_MAX_ALG_NAME];
357 449
358 const struct crypto_type *cra_type; 450 const struct crypto_type *cra_type;
359 451
360 union { 452 union {
361 struct cipher_alg cipher; 453 struct cipher_alg cipher;
362 struct compress_alg compress; 454 struct compress_alg compress;
363 } cra_u; 455 } cra_u;
364 456
365 int (*cra_init)(struct crypto_tfm *tfm 457 int (*cra_init)(struct crypto_tfm *tfm);
366 void (*cra_exit)(struct crypto_tfm *tf 458 void (*cra_exit)(struct crypto_tfm *tfm);
367 void (*cra_destroy)(struct crypto_alg 459 void (*cra_destroy)(struct crypto_alg *alg);
368 460
369 struct module *cra_module; 461 struct module *cra_module;
>> 462
>> 463 #ifdef CONFIG_CRYPTO_STATS
>> 464 union {
>> 465 struct crypto_istat_aead aead;
>> 466 struct crypto_istat_akcipher akcipher;
>> 467 struct crypto_istat_cipher cipher;
>> 468 struct crypto_istat_compress compress;
>> 469 struct crypto_istat_hash hash;
>> 470 struct crypto_istat_rng rng;
>> 471 struct crypto_istat_kpp kpp;
>> 472 } stats;
>> 473 #endif /* CONFIG_CRYPTO_STATS */
>> 474
370 } CRYPTO_MINALIGN_ATTR; 475 } CRYPTO_MINALIGN_ATTR;
371 476
>> 477 #ifdef CONFIG_CRYPTO_STATS
>> 478 void crypto_stats_init(struct crypto_alg *alg);
>> 479 void crypto_stats_get(struct crypto_alg *alg);
>> 480 void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret);
>> 481 void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret);
>> 482 void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg);
>> 483 void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg);
>> 484 void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg);
>> 485 void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg);
>> 486 void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg);
>> 487 void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg);
>> 488 void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg);
>> 489 void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg);
>> 490 void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret);
>> 491 void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret);
>> 492 void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret);
>> 493 void crypto_stats_rng_seed(struct crypto_alg *alg, int ret);
>> 494 void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret);
>> 495 void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg);
>> 496 void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg);
>> 497 #else
>> 498 static inline void crypto_stats_init(struct crypto_alg *alg)
>> 499 {}
>> 500 static inline void crypto_stats_get(struct crypto_alg *alg)
>> 501 {}
>> 502 static inline void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret)
>> 503 {}
>> 504 static inline void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret)
>> 505 {}
>> 506 static inline void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg)
>> 507 {}
>> 508 static inline void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg)
>> 509 {}
>> 510 static inline void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg)
>> 511 {}
>> 512 static inline void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg)
>> 513 {}
>> 514 static inline void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg)
>> 515 {}
>> 516 static inline void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg)
>> 517 {}
>> 518 static inline void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg)
>> 519 {}
>> 520 static inline void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg)
>> 521 {}
>> 522 static inline void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret)
>> 523 {}
>> 524 static inline void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret)
>> 525 {}
>> 526 static inline void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret)
>> 527 {}
>> 528 static inline void crypto_stats_rng_seed(struct crypto_alg *alg, int ret)
>> 529 {}
>> 530 static inline void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret)
>> 531 {}
>> 532 static inline void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg)
>> 533 {}
>> 534 static inline void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg)
>> 535 {}
>> 536 #endif
372 /* 537 /*
373 * A helper struct for waiting for completion 538 * A helper struct for waiting for completion of async crypto ops
374 */ 539 */
375 struct crypto_wait { 540 struct crypto_wait {
376 struct completion completion; 541 struct completion completion;
377 int err; 542 int err;
378 }; 543 };
379 544
380 /* 545 /*
381 * Macro for declaring a crypto op async wait 546 * Macro for declaring a crypto op async wait object on stack
382 */ 547 */
383 #define DECLARE_CRYPTO_WAIT(_wait) \ 548 #define DECLARE_CRYPTO_WAIT(_wait) \
384 struct crypto_wait _wait = { \ 549 struct crypto_wait _wait = { \
385 COMPLETION_INITIALIZER_ONSTACK 550 COMPLETION_INITIALIZER_ONSTACK((_wait).completion), 0 }
386 551
387 /* 552 /*
388 * Async ops completion helper functioons 553 * Async ops completion helper functioons
389 */ 554 */
390 void crypto_req_done(void *req, int err); !! 555 void crypto_req_done(struct crypto_async_request *req, int err);
391 556
392 static inline int crypto_wait_req(int err, str 557 static inline int crypto_wait_req(int err, struct crypto_wait *wait)
393 { 558 {
394 switch (err) { 559 switch (err) {
395 case -EINPROGRESS: 560 case -EINPROGRESS:
396 case -EBUSY: 561 case -EBUSY:
397 wait_for_completion(&wait->com 562 wait_for_completion(&wait->completion);
398 reinit_completion(&wait->compl 563 reinit_completion(&wait->completion);
399 err = wait->err; 564 err = wait->err;
400 break; 565 break;
401 } 566 }
402 567
403 return err; 568 return err;
404 } 569 }
405 570
406 static inline void crypto_init_wait(struct cry 571 static inline void crypto_init_wait(struct crypto_wait *wait)
407 { 572 {
408 init_completion(&wait->completion); 573 init_completion(&wait->completion);
409 } 574 }
410 575
411 /* 576 /*
>> 577 * Algorithm registration interface.
>> 578 */
>> 579 int crypto_register_alg(struct crypto_alg *alg);
>> 580 void crypto_unregister_alg(struct crypto_alg *alg);
>> 581 int crypto_register_algs(struct crypto_alg *algs, int count);
>> 582 void crypto_unregister_algs(struct crypto_alg *algs, int count);
>> 583
>> 584 /*
412 * Algorithm query interface. 585 * Algorithm query interface.
413 */ 586 */
414 int crypto_has_alg(const char *name, u32 type, 587 int crypto_has_alg(const char *name, u32 type, u32 mask);
415 588
416 /* 589 /*
417 * Transforms: user-instantiated objects which 590 * Transforms: user-instantiated objects which encapsulate algorithms
418 * and core processing logic. Managed via cry 591 * and core processing logic. Managed via crypto_alloc_*() and
419 * crypto_free_*(), as well as the various hel 592 * crypto_free_*(), as well as the various helpers below.
420 */ 593 */
421 594
422 struct crypto_tfm { 595 struct crypto_tfm {
423 refcount_t refcnt; <<
424 596
425 u32 crt_flags; 597 u32 crt_flags;
426 <<
427 int node; <<
428 598
429 void (*exit)(struct crypto_tfm *tfm); 599 void (*exit)(struct crypto_tfm *tfm);
430 600
431 struct crypto_alg *__crt_alg; 601 struct crypto_alg *__crt_alg;
432 602
433 void *__crt_ctx[] CRYPTO_MINALIGN_ATTR 603 void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
434 }; 604 };
435 605
>> 606 struct crypto_cipher {
>> 607 struct crypto_tfm base;
>> 608 };
>> 609
436 struct crypto_comp { 610 struct crypto_comp {
437 struct crypto_tfm base; 611 struct crypto_tfm base;
438 }; 612 };
439 613
>> 614 enum {
>> 615 CRYPTOA_UNSPEC,
>> 616 CRYPTOA_ALG,
>> 617 CRYPTOA_TYPE,
>> 618 CRYPTOA_U32,
>> 619 __CRYPTOA_MAX,
>> 620 };
>> 621
>> 622 #define CRYPTOA_MAX (__CRYPTOA_MAX - 1)
>> 623
>> 624 /* Maximum number of (rtattr) parameters for each template. */
>> 625 #define CRYPTO_MAX_ATTRS 32
>> 626
>> 627 struct crypto_attr_alg {
>> 628 char name[CRYPTO_MAX_ALG_NAME];
>> 629 };
>> 630
>> 631 struct crypto_attr_type {
>> 632 u32 type;
>> 633 u32 mask;
>> 634 };
>> 635
>> 636 struct crypto_attr_u32 {
>> 637 u32 num;
>> 638 };
>> 639
440 /* 640 /*
441 * Transform user interface. 641 * Transform user interface.
442 */ 642 */
443 643
444 struct crypto_tfm *crypto_alloc_base(const cha 644 struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);
445 void crypto_destroy_tfm(void *mem, struct cryp 645 void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm);
446 646
447 static inline void crypto_free_tfm(struct cryp 647 static inline void crypto_free_tfm(struct crypto_tfm *tfm)
448 { 648 {
449 return crypto_destroy_tfm(tfm, tfm); 649 return crypto_destroy_tfm(tfm, tfm);
450 } 650 }
451 651
>> 652 int alg_test(const char *driver, const char *alg, u32 type, u32 mask);
>> 653
452 /* 654 /*
453 * Transform helpers which query the underlyin 655 * Transform helpers which query the underlying algorithm.
454 */ 656 */
455 static inline const char *crypto_tfm_alg_name( 657 static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
456 { 658 {
457 return tfm->__crt_alg->cra_name; 659 return tfm->__crt_alg->cra_name;
458 } 660 }
459 661
460 static inline const char *crypto_tfm_alg_drive 662 static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
461 { 663 {
462 return tfm->__crt_alg->cra_driver_name 664 return tfm->__crt_alg->cra_driver_name;
463 } 665 }
464 666
>> 667 static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
>> 668 {
>> 669 return tfm->__crt_alg->cra_priority;
>> 670 }
>> 671
>> 672 static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
>> 673 {
>> 674 return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
>> 675 }
>> 676
465 static inline unsigned int crypto_tfm_alg_bloc 677 static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
466 { 678 {
467 return tfm->__crt_alg->cra_blocksize; 679 return tfm->__crt_alg->cra_blocksize;
468 } 680 }
469 681
470 static inline unsigned int crypto_tfm_alg_alig 682 static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm)
471 { 683 {
472 return tfm->__crt_alg->cra_alignmask; 684 return tfm->__crt_alg->cra_alignmask;
473 } 685 }
474 686
475 static inline u32 crypto_tfm_get_flags(struct 687 static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
476 { 688 {
477 return tfm->crt_flags; 689 return tfm->crt_flags;
478 } 690 }
479 691
480 static inline void crypto_tfm_set_flags(struct 692 static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
481 { 693 {
482 tfm->crt_flags |= flags; 694 tfm->crt_flags |= flags;
483 } 695 }
484 696
485 static inline void crypto_tfm_clear_flags(stru 697 static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
486 { 698 {
487 tfm->crt_flags &= ~flags; 699 tfm->crt_flags &= ~flags;
488 } 700 }
489 701
>> 702 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
>> 703 {
>> 704 return tfm->__crt_ctx;
>> 705 }
>> 706
490 static inline unsigned int crypto_tfm_ctx_alig 707 static inline unsigned int crypto_tfm_ctx_alignment(void)
491 { 708 {
492 struct crypto_tfm *tfm; 709 struct crypto_tfm *tfm;
493 return __alignof__(tfm->__crt_ctx); 710 return __alignof__(tfm->__crt_ctx);
494 } 711 }
>> 712
>> 713 /**
>> 714 * DOC: Single Block Cipher API
>> 715 *
>> 716 * The single block cipher API is used with the ciphers of type
>> 717 * CRYPTO_ALG_TYPE_CIPHER (listed as type "cipher" in /proc/crypto).
>> 718 *
>> 719 * Using the single block cipher API calls, operations with the basic cipher
>> 720 * primitive can be implemented. These cipher primitives exclude any block
>> 721 * chaining operations including IV handling.
>> 722 *
>> 723 * The purpose of this single block cipher API is to support the implementation
>> 724 * of templates or other concepts that only need to perform the cipher operation
>> 725 * on one block at a time. Templates invoke the underlying cipher primitive
>> 726 * block-wise and process either the input or the output data of these cipher
>> 727 * operations.
>> 728 */
>> 729
>> 730 static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm)
>> 731 {
>> 732 return (struct crypto_cipher *)tfm;
>> 733 }
>> 734
>> 735 /**
>> 736 * crypto_alloc_cipher() - allocate single block cipher handle
>> 737 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the
>> 738 * single block cipher
>> 739 * @type: specifies the type of the cipher
>> 740 * @mask: specifies the mask for the cipher
>> 741 *
>> 742 * Allocate a cipher handle for a single block cipher. The returned struct
>> 743 * crypto_cipher is the cipher handle that is required for any subsequent API
>> 744 * invocation for that single block cipher.
>> 745 *
>> 746 * Return: allocated cipher handle in case of success; IS_ERR() is true in case
>> 747 * of an error, PTR_ERR() returns the error code.
>> 748 */
>> 749 static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
>> 750 u32 type, u32 mask)
>> 751 {
>> 752 type &= ~CRYPTO_ALG_TYPE_MASK;
>> 753 type |= CRYPTO_ALG_TYPE_CIPHER;
>> 754 mask |= CRYPTO_ALG_TYPE_MASK;
>> 755
>> 756 return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
>> 757 }
>> 758
>> 759 static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
>> 760 {
>> 761 return &tfm->base;
>> 762 }
>> 763
>> 764 /**
>> 765 * crypto_free_cipher() - zeroize and free the single block cipher handle
>> 766 * @tfm: cipher handle to be freed
>> 767 */
>> 768 static inline void crypto_free_cipher(struct crypto_cipher *tfm)
>> 769 {
>> 770 crypto_free_tfm(crypto_cipher_tfm(tfm));
>> 771 }
>> 772
>> 773 /**
>> 774 * crypto_has_cipher() - Search for the availability of a single block cipher
>> 775 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the
>> 776 * single block cipher
>> 777 * @type: specifies the type of the cipher
>> 778 * @mask: specifies the mask for the cipher
>> 779 *
>> 780 * Return: true when the single block cipher is known to the kernel crypto API;
>> 781 * false otherwise
>> 782 */
>> 783 static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask)
>> 784 {
>> 785 type &= ~CRYPTO_ALG_TYPE_MASK;
>> 786 type |= CRYPTO_ALG_TYPE_CIPHER;
>> 787 mask |= CRYPTO_ALG_TYPE_MASK;
>> 788
>> 789 return crypto_has_alg(alg_name, type, mask);
>> 790 }
>> 791
>> 792 /**
>> 793 * crypto_cipher_blocksize() - obtain block size for cipher
>> 794 * @tfm: cipher handle
>> 795 *
>> 796 * The block size for the single block cipher referenced with the cipher handle
>> 797 * tfm is returned. The caller may use that information to allocate appropriate
>> 798 * memory for the data returned by the encryption or decryption operation
>> 799 *
>> 800 * Return: block size of cipher
>> 801 */
>> 802 static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
>> 803 {
>> 804 return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
>> 805 }
>> 806
>> 807 static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
>> 808 {
>> 809 return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
>> 810 }
>> 811
>> 812 static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
>> 813 {
>> 814 return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
>> 815 }
>> 816
>> 817 static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
>> 818 u32 flags)
>> 819 {
>> 820 crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
>> 821 }
>> 822
>> 823 static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
>> 824 u32 flags)
>> 825 {
>> 826 crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
>> 827 }
>> 828
>> 829 /**
>> 830 * crypto_cipher_setkey() - set key for cipher
>> 831 * @tfm: cipher handle
>> 832 * @key: buffer holding the key
>> 833 * @keylen: length of the key in bytes
>> 834 *
>> 835 * The caller provided key is set for the single block cipher referenced by the
>> 836 * cipher handle.
>> 837 *
>> 838 * Note, the key length determines the cipher type. Many block ciphers implement
>> 839 * different cipher modes depending on the key size, such as AES-128 vs AES-192
>> 840 * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128
>> 841 * is performed.
>> 842 *
>> 843 * Return: 0 if the setting of the key was successful; < 0 if an error occurred
>> 844 */
>> 845 int crypto_cipher_setkey(struct crypto_cipher *tfm,
>> 846 const u8 *key, unsigned int keylen);
>> 847
>> 848 /**
>> 849 * crypto_cipher_encrypt_one() - encrypt one block of plaintext
>> 850 * @tfm: cipher handle
>> 851 * @dst: points to the buffer that will be filled with the ciphertext
>> 852 * @src: buffer holding the plaintext to be encrypted
>> 853 *
>> 854 * Invoke the encryption operation of one block. The caller must ensure that
>> 855 * the plaintext and ciphertext buffers are at least one block in size.
>> 856 */
>> 857 void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
>> 858 u8 *dst, const u8 *src);
>> 859
>> 860 /**
>> 861 * crypto_cipher_decrypt_one() - decrypt one block of ciphertext
>> 862 * @tfm: cipher handle
>> 863 * @dst: points to the buffer that will be filled with the plaintext
>> 864 * @src: buffer holding the ciphertext to be decrypted
>> 865 *
>> 866 * Invoke the decryption operation of one block. The caller must ensure that
>> 867 * the plaintext and ciphertext buffers are at least one block in size.
>> 868 */
>> 869 void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
>> 870 u8 *dst, const u8 *src);
495 871
496 static inline struct crypto_comp *__crypto_com 872 static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
497 { 873 {
498 return (struct crypto_comp *)tfm; 874 return (struct crypto_comp *)tfm;
499 } 875 }
500 876
501 static inline struct crypto_comp *crypto_alloc 877 static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
502 878 u32 type, u32 mask)
503 { 879 {
504 type &= ~CRYPTO_ALG_TYPE_MASK; 880 type &= ~CRYPTO_ALG_TYPE_MASK;
505 type |= CRYPTO_ALG_TYPE_COMPRESS; 881 type |= CRYPTO_ALG_TYPE_COMPRESS;
506 mask |= CRYPTO_ALG_TYPE_MASK; 882 mask |= CRYPTO_ALG_TYPE_MASK;
507 883
508 return __crypto_comp_cast(crypto_alloc 884 return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask));
509 } 885 }
510 886
511 static inline struct crypto_tfm *crypto_comp_t 887 static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm)
512 { 888 {
513 return &tfm->base; 889 return &tfm->base;
514 } 890 }
515 891
516 static inline void crypto_free_comp(struct cry 892 static inline void crypto_free_comp(struct crypto_comp *tfm)
517 { 893 {
518 crypto_free_tfm(crypto_comp_tfm(tfm)); 894 crypto_free_tfm(crypto_comp_tfm(tfm));
519 } 895 }
520 896
521 static inline int crypto_has_comp(const char * 897 static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask)
522 { 898 {
523 type &= ~CRYPTO_ALG_TYPE_MASK; 899 type &= ~CRYPTO_ALG_TYPE_MASK;
524 type |= CRYPTO_ALG_TYPE_COMPRESS; 900 type |= CRYPTO_ALG_TYPE_COMPRESS;
525 mask |= CRYPTO_ALG_TYPE_MASK; 901 mask |= CRYPTO_ALG_TYPE_MASK;
526 902
527 return crypto_has_alg(alg_name, type, 903 return crypto_has_alg(alg_name, type, mask);
528 } 904 }
529 905
530 static inline const char *crypto_comp_name(str 906 static inline const char *crypto_comp_name(struct crypto_comp *tfm)
531 { 907 {
532 return crypto_tfm_alg_name(crypto_comp 908 return crypto_tfm_alg_name(crypto_comp_tfm(tfm));
533 } 909 }
534 910
535 int crypto_comp_compress(struct crypto_comp *t 911 int crypto_comp_compress(struct crypto_comp *tfm,
536 const u8 *src, unsign 912 const u8 *src, unsigned int slen,
537 u8 *dst, unsigned int 913 u8 *dst, unsigned int *dlen);
538 914
539 int crypto_comp_decompress(struct crypto_comp 915 int crypto_comp_decompress(struct crypto_comp *tfm,
540 const u8 *src, unsi 916 const u8 *src, unsigned int slen,
541 u8 *dst, unsigned i 917 u8 *dst, unsigned int *dlen);
542 918
543 #endif /* _LINUX_CRYPTO_H */ 919 #endif /* _LINUX_CRYPTO_H */
544 920
545 921
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