2 * Shared crypto simd helpers
4 * Copyright (c) 2012 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
5 * Copyright (c) 2016 Herbert Xu <herbert@gondor.apana.org.au>
7 * Based on aesni-intel_glue.c by:
8 * Copyright (C) 2008, Intel Corp.
9 * Author: Huang Ying <ying.huang@intel.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include <crypto/cryptd.h>
27 #include <crypto/internal/simd.h>
28 #include <crypto/internal/skcipher.h>
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/preempt.h>
34 struct simd_skcipher_alg {
35 const char *ialg_name;
36 struct skcipher_alg alg;
39 struct simd_skcipher_ctx {
40 struct cryptd_skcipher *cryptd_tfm;
43 static int simd_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
46 struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
47 struct crypto_skcipher *child = &ctx->cryptd_tfm->base;
50 crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
51 crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(tfm) &
53 err = crypto_skcipher_setkey(child, key, key_len);
54 crypto_skcipher_set_flags(tfm, crypto_skcipher_get_flags(child) &
59 static int simd_skcipher_encrypt(struct skcipher_request *req)
61 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
62 struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
63 struct skcipher_request *subreq;
64 struct crypto_skcipher *child;
66 subreq = skcipher_request_ctx(req);
69 if (!may_use_simd() ||
70 (in_atomic() && cryptd_skcipher_queued(ctx->cryptd_tfm)))
71 child = &ctx->cryptd_tfm->base;
73 child = cryptd_skcipher_child(ctx->cryptd_tfm);
75 skcipher_request_set_tfm(subreq, child);
77 return crypto_skcipher_encrypt(subreq);
80 static int simd_skcipher_decrypt(struct skcipher_request *req)
82 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
83 struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
84 struct skcipher_request *subreq;
85 struct crypto_skcipher *child;
87 subreq = skcipher_request_ctx(req);
90 if (!may_use_simd() ||
91 (in_atomic() && cryptd_skcipher_queued(ctx->cryptd_tfm)))
92 child = &ctx->cryptd_tfm->base;
94 child = cryptd_skcipher_child(ctx->cryptd_tfm);
96 skcipher_request_set_tfm(subreq, child);
98 return crypto_skcipher_decrypt(subreq);
101 static void simd_skcipher_exit(struct crypto_skcipher *tfm)
103 struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
105 cryptd_free_skcipher(ctx->cryptd_tfm);
108 static int simd_skcipher_init(struct crypto_skcipher *tfm)
110 struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
111 struct cryptd_skcipher *cryptd_tfm;
112 struct simd_skcipher_alg *salg;
113 struct skcipher_alg *alg;
116 alg = crypto_skcipher_alg(tfm);
117 salg = container_of(alg, struct simd_skcipher_alg, alg);
119 cryptd_tfm = cryptd_alloc_skcipher(salg->ialg_name,
121 CRYPTO_ALG_INTERNAL);
122 if (IS_ERR(cryptd_tfm))
123 return PTR_ERR(cryptd_tfm);
125 ctx->cryptd_tfm = cryptd_tfm;
127 reqsize = sizeof(struct skcipher_request);
128 reqsize += crypto_skcipher_reqsize(&cryptd_tfm->base);
130 crypto_skcipher_set_reqsize(tfm, reqsize);
135 struct simd_skcipher_alg *simd_skcipher_create_compat(const char *algname,
137 const char *basename)
139 struct simd_skcipher_alg *salg;
140 struct crypto_skcipher *tfm;
141 struct skcipher_alg *ialg;
142 struct skcipher_alg *alg;
145 tfm = crypto_alloc_skcipher(basename, CRYPTO_ALG_INTERNAL,
146 CRYPTO_ALG_INTERNAL | CRYPTO_ALG_ASYNC);
148 return ERR_CAST(tfm);
150 ialg = crypto_skcipher_alg(tfm);
152 salg = kzalloc(sizeof(*salg), GFP_KERNEL);
154 salg = ERR_PTR(-ENOMEM);
158 salg->ialg_name = basename;
162 if (snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", algname) >=
166 if (snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
167 drvname) >= CRYPTO_MAX_ALG_NAME)
170 alg->base.cra_flags = CRYPTO_ALG_ASYNC;
171 alg->base.cra_priority = ialg->base.cra_priority;
172 alg->base.cra_blocksize = ialg->base.cra_blocksize;
173 alg->base.cra_alignmask = ialg->base.cra_alignmask;
174 alg->base.cra_module = ialg->base.cra_module;
175 alg->base.cra_ctxsize = sizeof(struct simd_skcipher_ctx);
177 alg->ivsize = ialg->ivsize;
178 alg->chunksize = ialg->chunksize;
179 alg->min_keysize = ialg->min_keysize;
180 alg->max_keysize = ialg->max_keysize;
182 alg->init = simd_skcipher_init;
183 alg->exit = simd_skcipher_exit;
185 alg->setkey = simd_skcipher_setkey;
186 alg->encrypt = simd_skcipher_encrypt;
187 alg->decrypt = simd_skcipher_decrypt;
189 err = crypto_register_skcipher(alg);
194 crypto_free_skcipher(tfm);
202 EXPORT_SYMBOL_GPL(simd_skcipher_create_compat);
204 struct simd_skcipher_alg *simd_skcipher_create(const char *algname,
205 const char *basename)
207 char drvname[CRYPTO_MAX_ALG_NAME];
209 if (snprintf(drvname, CRYPTO_MAX_ALG_NAME, "simd-%s", basename) >=
211 return ERR_PTR(-ENAMETOOLONG);
213 return simd_skcipher_create_compat(algname, drvname, basename);
215 EXPORT_SYMBOL_GPL(simd_skcipher_create);
217 void simd_skcipher_free(struct simd_skcipher_alg *salg)
219 crypto_unregister_skcipher(&salg->alg);
222 EXPORT_SYMBOL_GPL(simd_skcipher_free);
224 int simd_register_skciphers_compat(struct skcipher_alg *algs, int count,
225 struct simd_skcipher_alg **simd_algs)
231 const char *basename;
232 struct simd_skcipher_alg *simd;
234 err = crypto_register_skciphers(algs, count);
238 for (i = 0; i < count; i++) {
239 WARN_ON(strncmp(algs[i].base.cra_name, "__", 2));
240 WARN_ON(strncmp(algs[i].base.cra_driver_name, "__", 2));
241 algname = algs[i].base.cra_name + 2;
242 drvname = algs[i].base.cra_driver_name + 2;
243 basename = algs[i].base.cra_driver_name;
244 simd = simd_skcipher_create_compat(algname, drvname, basename);
253 simd_unregister_skciphers(algs, count, simd_algs);
256 EXPORT_SYMBOL_GPL(simd_register_skciphers_compat);
258 void simd_unregister_skciphers(struct skcipher_alg *algs, int count,
259 struct simd_skcipher_alg **simd_algs)
263 crypto_unregister_skciphers(algs, count);
265 for (i = 0; i < count; i++) {
267 simd_skcipher_free(simd_algs[i]);
272 EXPORT_SYMBOL_GPL(simd_unregister_skciphers);
274 MODULE_LICENSE("GPL");