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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Public Key Encryption
4 *
5 * Copyright (c) 2015, Intel Corporation
6 * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
7 */
8#ifndef _CRYPTO_AKCIPHER_H
9#define _CRYPTO_AKCIPHER_H
10#include <linux/crypto.h>
11
12/**
13 * struct akcipher_request - public key request
14 *
15 * @base: Common attributes for async crypto requests
16 * @src: Source data
17 * For verify op this is signature + digest, in that case
18 * total size of @src is @src_len + @dst_len.
19 * @dst: Destination data (Should be NULL for verify op)
20 * @src_len: Size of the input buffer
21 * For verify op it's size of signature part of @src, this part
22 * is supposed to be operated by cipher.
23 * @dst_len: Size of @dst buffer (for all ops except verify).
24 * It needs to be at least as big as the expected result
25 * depending on the operation.
26 * After operation it will be updated with the actual size of the
27 * result.
28 * In case of error where the dst sgl size was insufficient,
29 * it will be updated to the size required for the operation.
30 * For verify op this is size of digest part in @src.
31 * @__ctx: Start of private context data
32 */
33struct akcipher_request {
34 struct crypto_async_request base;
35 struct scatterlist *src;
36 struct scatterlist *dst;
37 unsigned int src_len;
38 unsigned int dst_len;
39 void *__ctx[] CRYPTO_MINALIGN_ATTR;
40};
41
42/**
43 * struct crypto_akcipher - user-instantiated objects which encapsulate
44 * algorithms and core processing logic
45 *
46 * @reqsize: Request context size required by algorithm implementation
47 * @base: Common crypto API algorithm data structure
48 */
49struct crypto_akcipher {
50 unsigned int reqsize;
51
52 struct crypto_tfm base;
53};
54
55/**
56 * struct akcipher_alg - generic public key algorithm
57 *
58 * @sign: Function performs a sign operation as defined by public key
59 * algorithm. In case of error, where the dst_len was insufficient,
60 * the req->dst_len will be updated to the size required for the
61 * operation
62 * @verify: Function performs a complete verify operation as defined by
63 * public key algorithm, returning verification status. Requires
64 * digest value as input parameter.
65 * @encrypt: Function performs an encrypt operation as defined by public key
66 * algorithm. In case of error, where the dst_len was insufficient,
67 * the req->dst_len will be updated to the size required for the
68 * operation
69 * @decrypt: Function performs a decrypt operation as defined by public key
70 * algorithm. In case of error, where the dst_len was insufficient,
71 * the req->dst_len will be updated to the size required for the
72 * operation
73 * @set_pub_key: Function invokes the algorithm specific set public key
74 * function, which knows how to decode and interpret
75 * the BER encoded public key and parameters
76 * @set_priv_key: Function invokes the algorithm specific set private key
77 * function, which knows how to decode and interpret
78 * the BER encoded private key and parameters
79 * @max_size: Function returns dest buffer size required for a given key.
80 * @init: Initialize the cryptographic transformation object.
81 * This function is used to initialize the cryptographic
82 * transformation object. This function is called only once at
83 * the instantiation time, right after the transformation context
84 * was allocated. In case the cryptographic hardware has some
85 * special requirements which need to be handled by software, this
86 * function shall check for the precise requirement of the
87 * transformation and put any software fallbacks in place.
88 * @exit: Deinitialize the cryptographic transformation object. This is a
89 * counterpart to @init, used to remove various changes set in
90 * @init.
91 *
92 * @base: Common crypto API algorithm data structure
93 */
94struct akcipher_alg {
95 int (*sign)(struct akcipher_request *req);
96 int (*verify)(struct akcipher_request *req);
97 int (*encrypt)(struct akcipher_request *req);
98 int (*decrypt)(struct akcipher_request *req);
99 int (*set_pub_key)(struct crypto_akcipher *tfm, const void *key,
100 unsigned int keylen);
101 int (*set_priv_key)(struct crypto_akcipher *tfm, const void *key,
102 unsigned int keylen);
103 unsigned int (*max_size)(struct crypto_akcipher *tfm);
104 int (*init)(struct crypto_akcipher *tfm);
105 void (*exit)(struct crypto_akcipher *tfm);
106
107 struct crypto_alg base;
108};
109
110/**
111 * DOC: Generic Public Key API
112 *
113 * The Public Key API is used with the algorithms of type
114 * CRYPTO_ALG_TYPE_AKCIPHER (listed as type "akcipher" in /proc/crypto)
115 */
116
117/**
118 * crypto_alloc_akcipher() - allocate AKCIPHER tfm handle
119 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the
120 * public key algorithm e.g. "rsa"
121 * @type: specifies the type of the algorithm
122 * @mask: specifies the mask for the algorithm
123 *
124 * Allocate a handle for public key algorithm. The returned struct
125 * crypto_akcipher is the handle that is required for any subsequent
126 * API invocation for the public key operations.
127 *
128 * Return: allocated handle in case of success; IS_ERR() is true in case
129 * of an error, PTR_ERR() returns the error code.
130 */
131struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
132 u32 mask);
133
134static inline struct crypto_tfm *crypto_akcipher_tfm(
135 struct crypto_akcipher *tfm)
136{
137 return &tfm->base;
138}
139
140static inline struct akcipher_alg *__crypto_akcipher_alg(struct crypto_alg *alg)
141{
142 return container_of(alg, struct akcipher_alg, base);
143}
144
145static inline struct crypto_akcipher *__crypto_akcipher_tfm(
146 struct crypto_tfm *tfm)
147{
148 return container_of(tfm, struct crypto_akcipher, base);
149}
150
151static inline struct akcipher_alg *crypto_akcipher_alg(
152 struct crypto_akcipher *tfm)
153{
154 return __crypto_akcipher_alg(crypto_akcipher_tfm(tfm)->__crt_alg);
155}
156
157static inline unsigned int crypto_akcipher_reqsize(struct crypto_akcipher *tfm)
158{
159 return tfm->reqsize;
160}
161
162static inline void akcipher_request_set_tfm(struct akcipher_request *req,
163 struct crypto_akcipher *tfm)
164{
165 req->base.tfm = crypto_akcipher_tfm(tfm);
166}
167
168static inline struct crypto_akcipher *crypto_akcipher_reqtfm(
169 struct akcipher_request *req)
170{
171 return __crypto_akcipher_tfm(req->base.tfm);
172}
173
174/**
175 * crypto_free_akcipher() - free AKCIPHER tfm handle
176 *
177 * @tfm: AKCIPHER tfm handle allocated with crypto_alloc_akcipher()
178 *
179 * If @tfm is a NULL or error pointer, this function does nothing.
180 */
181static inline void crypto_free_akcipher(struct crypto_akcipher *tfm)
182{
183 crypto_destroy_tfm(tfm, crypto_akcipher_tfm(tfm));
184}
185
186/**
187 * akcipher_request_alloc() - allocates public key request
188 *
189 * @tfm: AKCIPHER tfm handle allocated with crypto_alloc_akcipher()
190 * @gfp: allocation flags
191 *
192 * Return: allocated handle in case of success or NULL in case of an error.
193 */
194static inline struct akcipher_request *akcipher_request_alloc(
195 struct crypto_akcipher *tfm, gfp_t gfp)
196{
197 struct akcipher_request *req;
198
199 req = kmalloc(sizeof(*req) + crypto_akcipher_reqsize(tfm), gfp);
200 if (likely(req))
201 akcipher_request_set_tfm(req, tfm);
202
203 return req;
204}
205
206/**
207 * akcipher_request_free() - zeroize and free public key request
208 *
209 * @req: request to free
210 */
211static inline void akcipher_request_free(struct akcipher_request *req)
212{
213 kfree_sensitive(req);
214}
215
216/**
217 * akcipher_request_set_callback() - Sets an asynchronous callback.
218 *
219 * Callback will be called when an asynchronous operation on a given
220 * request is finished.
221 *
222 * @req: request that the callback will be set for
223 * @flgs: specify for instance if the operation may backlog
224 * @cmpl: callback which will be called
225 * @data: private data used by the caller
226 */
227static inline void akcipher_request_set_callback(struct akcipher_request *req,
228 u32 flgs,
229 crypto_completion_t cmpl,
230 void *data)
231{
232 req->base.complete = cmpl;
233 req->base.data = data;
234 req->base.flags = flgs;
235}
236
237/**
238 * akcipher_request_set_crypt() - Sets request parameters
239 *
240 * Sets parameters required by crypto operation
241 *
242 * @req: public key request
243 * @src: ptr to input scatter list
244 * @dst: ptr to output scatter list or NULL for verify op
245 * @src_len: size of the src input scatter list to be processed
246 * @dst_len: size of the dst output scatter list or size of signature
247 * portion in @src for verify op
248 */
249static inline void akcipher_request_set_crypt(struct akcipher_request *req,
250 struct scatterlist *src,
251 struct scatterlist *dst,
252 unsigned int src_len,
253 unsigned int dst_len)
254{
255 req->src = src;
256 req->dst = dst;
257 req->src_len = src_len;
258 req->dst_len = dst_len;
259}
260
261/**
262 * crypto_akcipher_maxsize() - Get len for output buffer
263 *
264 * Function returns the dest buffer size required for a given key.
265 * Function assumes that the key is already set in the transformation. If this
266 * function is called without a setkey or with a failed setkey, you will end up
267 * in a NULL dereference.
268 *
269 * @tfm: AKCIPHER tfm handle allocated with crypto_alloc_akcipher()
270 */
271static inline unsigned int crypto_akcipher_maxsize(struct crypto_akcipher *tfm)
272{
273 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
274
275 return alg->max_size(tfm);
276}
277
278/**
279 * crypto_akcipher_encrypt() - Invoke public key encrypt operation
280 *
281 * Function invokes the specific public key encrypt operation for a given
282 * public key algorithm
283 *
284 * @req: asymmetric key request
285 *
286 * Return: zero on success; error code in case of error
287 */
288static inline int crypto_akcipher_encrypt(struct akcipher_request *req)
289{
290 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
291 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
292 struct crypto_alg *calg = tfm->base.__crt_alg;
293 unsigned int src_len = req->src_len;
294 int ret;
295
296 crypto_stats_get(calg);
297 ret = alg->encrypt(req);
298 crypto_stats_akcipher_encrypt(src_len, ret, calg);
299 return ret;
300}
301
302/**
303 * crypto_akcipher_decrypt() - Invoke public key decrypt operation
304 *
305 * Function invokes the specific public key decrypt operation for a given
306 * public key algorithm
307 *
308 * @req: asymmetric key request
309 *
310 * Return: zero on success; error code in case of error
311 */
312static inline int crypto_akcipher_decrypt(struct akcipher_request *req)
313{
314 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
315 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
316 struct crypto_alg *calg = tfm->base.__crt_alg;
317 unsigned int src_len = req->src_len;
318 int ret;
319
320 crypto_stats_get(calg);
321 ret = alg->decrypt(req);
322 crypto_stats_akcipher_decrypt(src_len, ret, calg);
323 return ret;
324}
325
326/**
327 * crypto_akcipher_sign() - Invoke public key sign operation
328 *
329 * Function invokes the specific public key sign operation for a given
330 * public key algorithm
331 *
332 * @req: asymmetric key request
333 *
334 * Return: zero on success; error code in case of error
335 */
336static inline int crypto_akcipher_sign(struct akcipher_request *req)
337{
338 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
339 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
340 struct crypto_alg *calg = tfm->base.__crt_alg;
341 int ret;
342
343 crypto_stats_get(calg);
344 ret = alg->sign(req);
345 crypto_stats_akcipher_sign(ret, calg);
346 return ret;
347}
348
349/**
350 * crypto_akcipher_verify() - Invoke public key signature verification
351 *
352 * Function invokes the specific public key signature verification operation
353 * for a given public key algorithm.
354 *
355 * @req: asymmetric key request
356 *
357 * Note: req->dst should be NULL, req->src should point to SG of size
358 * (req->src_size + req->dst_size), containing signature (of req->src_size
359 * length) with appended digest (of req->dst_size length).
360 *
361 * Return: zero on verification success; error code in case of error.
362 */
363static inline int crypto_akcipher_verify(struct akcipher_request *req)
364{
365 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
366 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
367 struct crypto_alg *calg = tfm->base.__crt_alg;
368 int ret;
369
370 crypto_stats_get(calg);
371 ret = alg->verify(req);
372 crypto_stats_akcipher_verify(ret, calg);
373 return ret;
374}
375
376/**
377 * crypto_akcipher_set_pub_key() - Invoke set public key operation
378 *
379 * Function invokes the algorithm specific set key function, which knows
380 * how to decode and interpret the encoded key and parameters
381 *
382 * @tfm: tfm handle
383 * @key: BER encoded public key, algo OID, paramlen, BER encoded
384 * parameters
385 * @keylen: length of the key (not including other data)
386 *
387 * Return: zero on success; error code in case of error
388 */
389static inline int crypto_akcipher_set_pub_key(struct crypto_akcipher *tfm,
390 const void *key,
391 unsigned int keylen)
392{
393 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
394
395 return alg->set_pub_key(tfm, key, keylen);
396}
397
398/**
399 * crypto_akcipher_set_priv_key() - Invoke set private key operation
400 *
401 * Function invokes the algorithm specific set key function, which knows
402 * how to decode and interpret the encoded key and parameters
403 *
404 * @tfm: tfm handle
405 * @key: BER encoded private key, algo OID, paramlen, BER encoded
406 * parameters
407 * @keylen: length of the key (not including other data)
408 *
409 * Return: zero on success; error code in case of error
410 */
411static inline int crypto_akcipher_set_priv_key(struct crypto_akcipher *tfm,
412 const void *key,
413 unsigned int keylen)
414{
415 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
416
417 return alg->set_priv_key(tfm, key, keylen);
418}
419#endif
1/*
2 * Public Key Encryption
3 *
4 * Copyright (c) 2015, Intel Corporation
5 * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 */
13#ifndef _CRYPTO_AKCIPHER_H
14#define _CRYPTO_AKCIPHER_H
15#include <linux/crypto.h>
16
17/**
18 * struct akcipher_request - public key request
19 *
20 * @base: Common attributes for async crypto requests
21 * @src: Source data
22 * @dst: Destination data
23 * @src_len: Size of the input buffer
24 * @dst_len: Size of the output buffer. It needs to be at least
25 * as big as the expected result depending on the operation
26 * After operation it will be updated with the actual size of the
27 * result.
28 * In case of error where the dst sgl size was insufficient,
29 * it will be updated to the size required for the operation.
30 * @__ctx: Start of private context data
31 */
32struct akcipher_request {
33 struct crypto_async_request base;
34 struct scatterlist *src;
35 struct scatterlist *dst;
36 unsigned int src_len;
37 unsigned int dst_len;
38 void *__ctx[] CRYPTO_MINALIGN_ATTR;
39};
40
41/**
42 * struct crypto_akcipher - user-instantiated objects which encapsulate
43 * algorithms and core processing logic
44 *
45 * @base: Common crypto API algorithm data structure
46 */
47struct crypto_akcipher {
48 struct crypto_tfm base;
49};
50
51/**
52 * struct akcipher_alg - generic public key algorithm
53 *
54 * @sign: Function performs a sign operation as defined by public key
55 * algorithm. In case of error, where the dst_len was insufficient,
56 * the req->dst_len will be updated to the size required for the
57 * operation
58 * @verify: Function performs a sign operation as defined by public key
59 * algorithm. In case of error, where the dst_len was insufficient,
60 * the req->dst_len will be updated to the size required for the
61 * operation
62 * @encrypt: Function performs an encrypt operation as defined by public key
63 * algorithm. In case of error, where the dst_len was insufficient,
64 * the req->dst_len will be updated to the size required for the
65 * operation
66 * @decrypt: Function performs a decrypt operation as defined by public key
67 * algorithm. In case of error, where the dst_len was insufficient,
68 * the req->dst_len will be updated to the size required for the
69 * operation
70 * @set_pub_key: Function invokes the algorithm specific set public key
71 * function, which knows how to decode and interpret
72 * the BER encoded public key
73 * @set_priv_key: Function invokes the algorithm specific set private key
74 * function, which knows how to decode and interpret
75 * the BER encoded private key
76 * @max_size: Function returns dest buffer size required for a given key.
77 * @init: Initialize the cryptographic transformation object.
78 * This function is used to initialize the cryptographic
79 * transformation object. This function is called only once at
80 * the instantiation time, right after the transformation context
81 * was allocated. In case the cryptographic hardware has some
82 * special requirements which need to be handled by software, this
83 * function shall check for the precise requirement of the
84 * transformation and put any software fallbacks in place.
85 * @exit: Deinitialize the cryptographic transformation object. This is a
86 * counterpart to @init, used to remove various changes set in
87 * @init.
88 *
89 * @reqsize: Request context size required by algorithm implementation
90 * @base: Common crypto API algorithm data structure
91 */
92struct akcipher_alg {
93 int (*sign)(struct akcipher_request *req);
94 int (*verify)(struct akcipher_request *req);
95 int (*encrypt)(struct akcipher_request *req);
96 int (*decrypt)(struct akcipher_request *req);
97 int (*set_pub_key)(struct crypto_akcipher *tfm, const void *key,
98 unsigned int keylen);
99 int (*set_priv_key)(struct crypto_akcipher *tfm, const void *key,
100 unsigned int keylen);
101 int (*max_size)(struct crypto_akcipher *tfm);
102 int (*init)(struct crypto_akcipher *tfm);
103 void (*exit)(struct crypto_akcipher *tfm);
104
105 unsigned int reqsize;
106 struct crypto_alg base;
107};
108
109/**
110 * DOC: Generic Public Key API
111 *
112 * The Public Key API is used with the algorithms of type
113 * CRYPTO_ALG_TYPE_AKCIPHER (listed as type "akcipher" in /proc/crypto)
114 */
115
116/**
117 * crypto_alloc_akcipher() - allocate AKCIPHER tfm handle
118 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the
119 * public key algorithm e.g. "rsa"
120 * @type: specifies the type of the algorithm
121 * @mask: specifies the mask for the algorithm
122 *
123 * Allocate a handle for public key algorithm. The returned struct
124 * crypto_akcipher is the handle that is required for any subsequent
125 * API invocation for the public key operations.
126 *
127 * Return: allocated handle in case of success; IS_ERR() is true in case
128 * of an error, PTR_ERR() returns the error code.
129 */
130struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
131 u32 mask);
132
133static inline struct crypto_tfm *crypto_akcipher_tfm(
134 struct crypto_akcipher *tfm)
135{
136 return &tfm->base;
137}
138
139static inline struct akcipher_alg *__crypto_akcipher_alg(struct crypto_alg *alg)
140{
141 return container_of(alg, struct akcipher_alg, base);
142}
143
144static inline struct crypto_akcipher *__crypto_akcipher_tfm(
145 struct crypto_tfm *tfm)
146{
147 return container_of(tfm, struct crypto_akcipher, base);
148}
149
150static inline struct akcipher_alg *crypto_akcipher_alg(
151 struct crypto_akcipher *tfm)
152{
153 return __crypto_akcipher_alg(crypto_akcipher_tfm(tfm)->__crt_alg);
154}
155
156static inline unsigned int crypto_akcipher_reqsize(struct crypto_akcipher *tfm)
157{
158 return crypto_akcipher_alg(tfm)->reqsize;
159}
160
161static inline void akcipher_request_set_tfm(struct akcipher_request *req,
162 struct crypto_akcipher *tfm)
163{
164 req->base.tfm = crypto_akcipher_tfm(tfm);
165}
166
167static inline struct crypto_akcipher *crypto_akcipher_reqtfm(
168 struct akcipher_request *req)
169{
170 return __crypto_akcipher_tfm(req->base.tfm);
171}
172
173/**
174 * crypto_free_akcipher() - free AKCIPHER tfm handle
175 *
176 * @tfm: AKCIPHER tfm handle allocated with crypto_alloc_akcipher()
177 */
178static inline void crypto_free_akcipher(struct crypto_akcipher *tfm)
179{
180 crypto_destroy_tfm(tfm, crypto_akcipher_tfm(tfm));
181}
182
183/**
184 * akcipher_request_alloc() - allocates public key request
185 *
186 * @tfm: AKCIPHER tfm handle allocated with crypto_alloc_akcipher()
187 * @gfp: allocation flags
188 *
189 * Return: allocated handle in case of success or NULL in case of an error.
190 */
191static inline struct akcipher_request *akcipher_request_alloc(
192 struct crypto_akcipher *tfm, gfp_t gfp)
193{
194 struct akcipher_request *req;
195
196 req = kmalloc(sizeof(*req) + crypto_akcipher_reqsize(tfm), gfp);
197 if (likely(req))
198 akcipher_request_set_tfm(req, tfm);
199
200 return req;
201}
202
203/**
204 * akcipher_request_free() - zeroize and free public key request
205 *
206 * @req: request to free
207 */
208static inline void akcipher_request_free(struct akcipher_request *req)
209{
210 kzfree(req);
211}
212
213/**
214 * akcipher_request_set_callback() - Sets an asynchronous callback.
215 *
216 * Callback will be called when an asynchronous operation on a given
217 * request is finished.
218 *
219 * @req: request that the callback will be set for
220 * @flgs: specify for instance if the operation may backlog
221 * @cmpl: callback which will be called
222 * @data: private data used by the caller
223 */
224static inline void akcipher_request_set_callback(struct akcipher_request *req,
225 u32 flgs,
226 crypto_completion_t cmpl,
227 void *data)
228{
229 req->base.complete = cmpl;
230 req->base.data = data;
231 req->base.flags = flgs;
232}
233
234/**
235 * akcipher_request_set_crypt() - Sets request parameters
236 *
237 * Sets parameters required by crypto operation
238 *
239 * @req: public key request
240 * @src: ptr to input scatter list
241 * @dst: ptr to output scatter list
242 * @src_len: size of the src input scatter list to be processed
243 * @dst_len: size of the dst output scatter list
244 */
245static inline void akcipher_request_set_crypt(struct akcipher_request *req,
246 struct scatterlist *src,
247 struct scatterlist *dst,
248 unsigned int src_len,
249 unsigned int dst_len)
250{
251 req->src = src;
252 req->dst = dst;
253 req->src_len = src_len;
254 req->dst_len = dst_len;
255}
256
257/**
258 * crypto_akcipher_maxsize() - Get len for output buffer
259 *
260 * Function returns the dest buffer size required for a given key
261 *
262 * @tfm: AKCIPHER tfm handle allocated with crypto_alloc_akcipher()
263 *
264 * Return: minimum len for output buffer or error code in key hasn't been set
265 */
266static inline int crypto_akcipher_maxsize(struct crypto_akcipher *tfm)
267{
268 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
269
270 return alg->max_size(tfm);
271}
272
273/**
274 * crypto_akcipher_encrypt() - Invoke public key encrypt operation
275 *
276 * Function invokes the specific public key encrypt operation for a given
277 * public key algorithm
278 *
279 * @req: asymmetric key request
280 *
281 * Return: zero on success; error code in case of error
282 */
283static inline int crypto_akcipher_encrypt(struct akcipher_request *req)
284{
285 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
286 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
287
288 return alg->encrypt(req);
289}
290
291/**
292 * crypto_akcipher_decrypt() - Invoke public key decrypt operation
293 *
294 * Function invokes the specific public key decrypt operation for a given
295 * public key algorithm
296 *
297 * @req: asymmetric key request
298 *
299 * Return: zero on success; error code in case of error
300 */
301static inline int crypto_akcipher_decrypt(struct akcipher_request *req)
302{
303 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
304 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
305
306 return alg->decrypt(req);
307}
308
309/**
310 * crypto_akcipher_sign() - Invoke public key sign operation
311 *
312 * Function invokes the specific public key sign operation for a given
313 * public key algorithm
314 *
315 * @req: asymmetric key request
316 *
317 * Return: zero on success; error code in case of error
318 */
319static inline int crypto_akcipher_sign(struct akcipher_request *req)
320{
321 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
322 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
323
324 return alg->sign(req);
325}
326
327/**
328 * crypto_akcipher_verify() - Invoke public key verify operation
329 *
330 * Function invokes the specific public key verify operation for a given
331 * public key algorithm
332 *
333 * @req: asymmetric key request
334 *
335 * Return: zero on success; error code in case of error
336 */
337static inline int crypto_akcipher_verify(struct akcipher_request *req)
338{
339 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
340 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
341
342 return alg->verify(req);
343}
344
345/**
346 * crypto_akcipher_set_pub_key() - Invoke set public key operation
347 *
348 * Function invokes the algorithm specific set key function, which knows
349 * how to decode and interpret the encoded key
350 *
351 * @tfm: tfm handle
352 * @key: BER encoded public key
353 * @keylen: length of the key
354 *
355 * Return: zero on success; error code in case of error
356 */
357static inline int crypto_akcipher_set_pub_key(struct crypto_akcipher *tfm,
358 const void *key,
359 unsigned int keylen)
360{
361 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
362
363 return alg->set_pub_key(tfm, key, keylen);
364}
365
366/**
367 * crypto_akcipher_set_priv_key() - Invoke set private key operation
368 *
369 * Function invokes the algorithm specific set key function, which knows
370 * how to decode and interpret the encoded key
371 *
372 * @tfm: tfm handle
373 * @key: BER encoded private key
374 * @keylen: length of the key
375 *
376 * Return: zero on success; error code in case of error
377 */
378static inline int crypto_akcipher_set_priv_key(struct crypto_akcipher *tfm,
379 const void *key,
380 unsigned int keylen)
381{
382 struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
383
384 return alg->set_priv_key(tfm, key, keylen);
385}
386#endif