11ccea77eSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
2266d0516SHerbert Xu /*
3266d0516SHerbert Xu * Shared crypto simd helpers
4266d0516SHerbert Xu *
5266d0516SHerbert Xu * Copyright (c) 2012 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
6266d0516SHerbert Xu * Copyright (c) 2016 Herbert Xu <herbert@gondor.apana.org.au>
71661131aSEric Biggers * Copyright (c) 2019 Google LLC
8266d0516SHerbert Xu *
9266d0516SHerbert Xu * Based on aesni-intel_glue.c by:
10266d0516SHerbert Xu * Copyright (C) 2008, Intel Corp.
11266d0516SHerbert Xu * Author: Huang Ying <ying.huang@intel.com>
121661131aSEric Biggers */
131661131aSEric Biggers
141661131aSEric Biggers /*
151661131aSEric Biggers * Shared crypto SIMD helpers. These functions dynamically create and register
161661131aSEric Biggers * an skcipher or AEAD algorithm that wraps another, internal algorithm. The
171661131aSEric Biggers * wrapper ensures that the internal algorithm is only executed in a context
181661131aSEric Biggers * where SIMD instructions are usable, i.e. where may_use_simd() returns true.
191661131aSEric Biggers * If SIMD is already usable, the wrapper directly calls the internal algorithm.
201661131aSEric Biggers * Otherwise it defers execution to a workqueue via cryptd.
21266d0516SHerbert Xu *
221661131aSEric Biggers * This is an alternative to the internal algorithm implementing a fallback for
231661131aSEric Biggers * the !may_use_simd() case itself.
241661131aSEric Biggers *
251661131aSEric Biggers * Note that the wrapper algorithm is asynchronous, i.e. it has the
261661131aSEric Biggers * CRYPTO_ALG_ASYNC flag set. Therefore it won't be found by users who
271661131aSEric Biggers * explicitly allocate a synchronous algorithm.
28266d0516SHerbert Xu */
29266d0516SHerbert Xu
30266d0516SHerbert Xu #include <crypto/cryptd.h>
311661131aSEric Biggers #include <crypto/internal/aead.h>
32266d0516SHerbert Xu #include <crypto/internal/simd.h>
33266d0516SHerbert Xu #include <crypto/internal/skcipher.h>
34266d0516SHerbert Xu #include <linux/kernel.h>
35266d0516SHerbert Xu #include <linux/module.h>
36266d0516SHerbert Xu #include <linux/preempt.h>
37266d0516SHerbert Xu #include <asm/simd.h>
38266d0516SHerbert Xu
391661131aSEric Biggers /* skcipher support */
401661131aSEric Biggers
41266d0516SHerbert Xu struct simd_skcipher_alg {
42266d0516SHerbert Xu const char *ialg_name;
43266d0516SHerbert Xu struct skcipher_alg alg;
44266d0516SHerbert Xu };
45266d0516SHerbert Xu
46266d0516SHerbert Xu struct simd_skcipher_ctx {
47266d0516SHerbert Xu struct cryptd_skcipher *cryptd_tfm;
48266d0516SHerbert Xu };
49266d0516SHerbert Xu
simd_skcipher_setkey(struct crypto_skcipher * tfm,const u8 * key,unsigned int key_len)50266d0516SHerbert Xu static int simd_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
51266d0516SHerbert Xu unsigned int key_len)
52266d0516SHerbert Xu {
53266d0516SHerbert Xu struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
54266d0516SHerbert Xu struct crypto_skcipher *child = &ctx->cryptd_tfm->base;
55266d0516SHerbert Xu
56266d0516SHerbert Xu crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
57266d0516SHerbert Xu crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(tfm) &
58266d0516SHerbert Xu CRYPTO_TFM_REQ_MASK);
59af5034e8SEric Biggers return crypto_skcipher_setkey(child, key, key_len);
60266d0516SHerbert Xu }
61266d0516SHerbert Xu
simd_skcipher_encrypt(struct skcipher_request * req)62266d0516SHerbert Xu static int simd_skcipher_encrypt(struct skcipher_request *req)
63266d0516SHerbert Xu {
64266d0516SHerbert Xu struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
65266d0516SHerbert Xu struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
66266d0516SHerbert Xu struct skcipher_request *subreq;
67266d0516SHerbert Xu struct crypto_skcipher *child;
68266d0516SHerbert Xu
69266d0516SHerbert Xu subreq = skcipher_request_ctx(req);
70266d0516SHerbert Xu *subreq = *req;
71266d0516SHerbert Xu
728b8d91d4SEric Biggers if (!crypto_simd_usable() ||
73266d0516SHerbert Xu (in_atomic() && cryptd_skcipher_queued(ctx->cryptd_tfm)))
74266d0516SHerbert Xu child = &ctx->cryptd_tfm->base;
75266d0516SHerbert Xu else
76266d0516SHerbert Xu child = cryptd_skcipher_child(ctx->cryptd_tfm);
77266d0516SHerbert Xu
78266d0516SHerbert Xu skcipher_request_set_tfm(subreq, child);
79266d0516SHerbert Xu
80266d0516SHerbert Xu return crypto_skcipher_encrypt(subreq);
81266d0516SHerbert Xu }
82266d0516SHerbert Xu
simd_skcipher_decrypt(struct skcipher_request * req)83266d0516SHerbert Xu static int simd_skcipher_decrypt(struct skcipher_request *req)
84266d0516SHerbert Xu {
85266d0516SHerbert Xu struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
86266d0516SHerbert Xu struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
87266d0516SHerbert Xu struct skcipher_request *subreq;
88266d0516SHerbert Xu struct crypto_skcipher *child;
89266d0516SHerbert Xu
90266d0516SHerbert Xu subreq = skcipher_request_ctx(req);
91266d0516SHerbert Xu *subreq = *req;
92266d0516SHerbert Xu
938b8d91d4SEric Biggers if (!crypto_simd_usable() ||
94266d0516SHerbert Xu (in_atomic() && cryptd_skcipher_queued(ctx->cryptd_tfm)))
95266d0516SHerbert Xu child = &ctx->cryptd_tfm->base;
96266d0516SHerbert Xu else
97266d0516SHerbert Xu child = cryptd_skcipher_child(ctx->cryptd_tfm);
98266d0516SHerbert Xu
99266d0516SHerbert Xu skcipher_request_set_tfm(subreq, child);
100266d0516SHerbert Xu
101266d0516SHerbert Xu return crypto_skcipher_decrypt(subreq);
102266d0516SHerbert Xu }
103266d0516SHerbert Xu
simd_skcipher_exit(struct crypto_skcipher * tfm)104266d0516SHerbert Xu static void simd_skcipher_exit(struct crypto_skcipher *tfm)
105266d0516SHerbert Xu {
106266d0516SHerbert Xu struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
107266d0516SHerbert Xu
108266d0516SHerbert Xu cryptd_free_skcipher(ctx->cryptd_tfm);
109266d0516SHerbert Xu }
110266d0516SHerbert Xu
simd_skcipher_init(struct crypto_skcipher * tfm)111266d0516SHerbert Xu static int simd_skcipher_init(struct crypto_skcipher *tfm)
112266d0516SHerbert Xu {
113266d0516SHerbert Xu struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
114266d0516SHerbert Xu struct cryptd_skcipher *cryptd_tfm;
115266d0516SHerbert Xu struct simd_skcipher_alg *salg;
116266d0516SHerbert Xu struct skcipher_alg *alg;
117266d0516SHerbert Xu unsigned reqsize;
118266d0516SHerbert Xu
119266d0516SHerbert Xu alg = crypto_skcipher_alg(tfm);
120266d0516SHerbert Xu salg = container_of(alg, struct simd_skcipher_alg, alg);
121266d0516SHerbert Xu
122266d0516SHerbert Xu cryptd_tfm = cryptd_alloc_skcipher(salg->ialg_name,
123266d0516SHerbert Xu CRYPTO_ALG_INTERNAL,
124266d0516SHerbert Xu CRYPTO_ALG_INTERNAL);
125266d0516SHerbert Xu if (IS_ERR(cryptd_tfm))
126266d0516SHerbert Xu return PTR_ERR(cryptd_tfm);
127266d0516SHerbert Xu
128266d0516SHerbert Xu ctx->cryptd_tfm = cryptd_tfm;
129266d0516SHerbert Xu
130508a1c4dSArd Biesheuvel reqsize = crypto_skcipher_reqsize(cryptd_skcipher_child(cryptd_tfm));
131508a1c4dSArd Biesheuvel reqsize = max(reqsize, crypto_skcipher_reqsize(&cryptd_tfm->base));
132508a1c4dSArd Biesheuvel reqsize += sizeof(struct skcipher_request);
133266d0516SHerbert Xu
134266d0516SHerbert Xu crypto_skcipher_set_reqsize(tfm, reqsize);
135266d0516SHerbert Xu
136266d0516SHerbert Xu return 0;
137266d0516SHerbert Xu }
138266d0516SHerbert Xu
simd_skcipher_create_compat(struct skcipher_alg * ialg,const char * algname,const char * drvname,const char * basename)139*3c44d31cSHerbert Xu struct simd_skcipher_alg *simd_skcipher_create_compat(struct skcipher_alg *ialg,
140*3c44d31cSHerbert Xu const char *algname,
141266d0516SHerbert Xu const char *drvname,
142266d0516SHerbert Xu const char *basename)
143266d0516SHerbert Xu {
144266d0516SHerbert Xu struct simd_skcipher_alg *salg;
145266d0516SHerbert Xu struct skcipher_alg *alg;
146266d0516SHerbert Xu int err;
147266d0516SHerbert Xu
148266d0516SHerbert Xu salg = kzalloc(sizeof(*salg), GFP_KERNEL);
149266d0516SHerbert Xu if (!salg) {
150266d0516SHerbert Xu salg = ERR_PTR(-ENOMEM);
151*3c44d31cSHerbert Xu goto out;
152266d0516SHerbert Xu }
153266d0516SHerbert Xu
154266d0516SHerbert Xu salg->ialg_name = basename;
155266d0516SHerbert Xu alg = &salg->alg;
156266d0516SHerbert Xu
157266d0516SHerbert Xu err = -ENAMETOOLONG;
158266d0516SHerbert Xu if (snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", algname) >=
159266d0516SHerbert Xu CRYPTO_MAX_ALG_NAME)
160266d0516SHerbert Xu goto out_free_salg;
161266d0516SHerbert Xu
162266d0516SHerbert Xu if (snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
163266d0516SHerbert Xu drvname) >= CRYPTO_MAX_ALG_NAME)
164266d0516SHerbert Xu goto out_free_salg;
165266d0516SHerbert Xu
1667bcb2c99SEric Biggers alg->base.cra_flags = CRYPTO_ALG_ASYNC |
1677bcb2c99SEric Biggers (ialg->base.cra_flags & CRYPTO_ALG_INHERITED_FLAGS);
168266d0516SHerbert Xu alg->base.cra_priority = ialg->base.cra_priority;
169266d0516SHerbert Xu alg->base.cra_blocksize = ialg->base.cra_blocksize;
170266d0516SHerbert Xu alg->base.cra_alignmask = ialg->base.cra_alignmask;
171266d0516SHerbert Xu alg->base.cra_module = ialg->base.cra_module;
172266d0516SHerbert Xu alg->base.cra_ctxsize = sizeof(struct simd_skcipher_ctx);
173266d0516SHerbert Xu
174266d0516SHerbert Xu alg->ivsize = ialg->ivsize;
175266d0516SHerbert Xu alg->chunksize = ialg->chunksize;
176266d0516SHerbert Xu alg->min_keysize = ialg->min_keysize;
177266d0516SHerbert Xu alg->max_keysize = ialg->max_keysize;
178266d0516SHerbert Xu
179266d0516SHerbert Xu alg->init = simd_skcipher_init;
180266d0516SHerbert Xu alg->exit = simd_skcipher_exit;
181266d0516SHerbert Xu
182266d0516SHerbert Xu alg->setkey = simd_skcipher_setkey;
183266d0516SHerbert Xu alg->encrypt = simd_skcipher_encrypt;
184266d0516SHerbert Xu alg->decrypt = simd_skcipher_decrypt;
185266d0516SHerbert Xu
186266d0516SHerbert Xu err = crypto_register_skcipher(alg);
187266d0516SHerbert Xu if (err)
188266d0516SHerbert Xu goto out_free_salg;
189266d0516SHerbert Xu
190*3c44d31cSHerbert Xu out:
191266d0516SHerbert Xu return salg;
192266d0516SHerbert Xu
193266d0516SHerbert Xu out_free_salg:
194266d0516SHerbert Xu kfree(salg);
195266d0516SHerbert Xu salg = ERR_PTR(err);
196*3c44d31cSHerbert Xu goto out;
197266d0516SHerbert Xu }
198266d0516SHerbert Xu EXPORT_SYMBOL_GPL(simd_skcipher_create_compat);
199266d0516SHerbert Xu
simd_skcipher_free(struct simd_skcipher_alg * salg)200266d0516SHerbert Xu void simd_skcipher_free(struct simd_skcipher_alg *salg)
201266d0516SHerbert Xu {
202266d0516SHerbert Xu crypto_unregister_skcipher(&salg->alg);
203266d0516SHerbert Xu kfree(salg);
204266d0516SHerbert Xu }
205266d0516SHerbert Xu EXPORT_SYMBOL_GPL(simd_skcipher_free);
206266d0516SHerbert Xu
simd_register_skciphers_compat(struct skcipher_alg * algs,int count,struct simd_skcipher_alg ** simd_algs)207d14f0a1fSEric Biggers int simd_register_skciphers_compat(struct skcipher_alg *algs, int count,
208d14f0a1fSEric Biggers struct simd_skcipher_alg **simd_algs)
209d14f0a1fSEric Biggers {
210d14f0a1fSEric Biggers int err;
211d14f0a1fSEric Biggers int i;
212d14f0a1fSEric Biggers const char *algname;
213d14f0a1fSEric Biggers const char *drvname;
214d14f0a1fSEric Biggers const char *basename;
215d14f0a1fSEric Biggers struct simd_skcipher_alg *simd;
216d14f0a1fSEric Biggers
217d14f0a1fSEric Biggers err = crypto_register_skciphers(algs, count);
218d14f0a1fSEric Biggers if (err)
219d14f0a1fSEric Biggers return err;
220d14f0a1fSEric Biggers
221d14f0a1fSEric Biggers for (i = 0; i < count; i++) {
222d14f0a1fSEric Biggers WARN_ON(strncmp(algs[i].base.cra_name, "__", 2));
223d14f0a1fSEric Biggers WARN_ON(strncmp(algs[i].base.cra_driver_name, "__", 2));
224d14f0a1fSEric Biggers algname = algs[i].base.cra_name + 2;
225d14f0a1fSEric Biggers drvname = algs[i].base.cra_driver_name + 2;
226d14f0a1fSEric Biggers basename = algs[i].base.cra_driver_name;
227*3c44d31cSHerbert Xu simd = simd_skcipher_create_compat(algs + i, algname, drvname, basename);
228d14f0a1fSEric Biggers err = PTR_ERR(simd);
229d14f0a1fSEric Biggers if (IS_ERR(simd))
230d14f0a1fSEric Biggers goto err_unregister;
231d14f0a1fSEric Biggers simd_algs[i] = simd;
232d14f0a1fSEric Biggers }
233d14f0a1fSEric Biggers return 0;
234d14f0a1fSEric Biggers
235d14f0a1fSEric Biggers err_unregister:
236d14f0a1fSEric Biggers simd_unregister_skciphers(algs, count, simd_algs);
237d14f0a1fSEric Biggers return err;
238d14f0a1fSEric Biggers }
239d14f0a1fSEric Biggers EXPORT_SYMBOL_GPL(simd_register_skciphers_compat);
240d14f0a1fSEric Biggers
simd_unregister_skciphers(struct skcipher_alg * algs,int count,struct simd_skcipher_alg ** simd_algs)241d14f0a1fSEric Biggers void simd_unregister_skciphers(struct skcipher_alg *algs, int count,
242d14f0a1fSEric Biggers struct simd_skcipher_alg **simd_algs)
243d14f0a1fSEric Biggers {
244d14f0a1fSEric Biggers int i;
245d14f0a1fSEric Biggers
246d14f0a1fSEric Biggers crypto_unregister_skciphers(algs, count);
247d14f0a1fSEric Biggers
248d14f0a1fSEric Biggers for (i = 0; i < count; i++) {
249d14f0a1fSEric Biggers if (simd_algs[i]) {
250d14f0a1fSEric Biggers simd_skcipher_free(simd_algs[i]);
251d14f0a1fSEric Biggers simd_algs[i] = NULL;
252d14f0a1fSEric Biggers }
253d14f0a1fSEric Biggers }
254d14f0a1fSEric Biggers }
255d14f0a1fSEric Biggers EXPORT_SYMBOL_GPL(simd_unregister_skciphers);
256d14f0a1fSEric Biggers
2571661131aSEric Biggers /* AEAD support */
2581661131aSEric Biggers
2591661131aSEric Biggers struct simd_aead_alg {
2601661131aSEric Biggers const char *ialg_name;
2611661131aSEric Biggers struct aead_alg alg;
2621661131aSEric Biggers };
2631661131aSEric Biggers
2641661131aSEric Biggers struct simd_aead_ctx {
2651661131aSEric Biggers struct cryptd_aead *cryptd_tfm;
2661661131aSEric Biggers };
2671661131aSEric Biggers
simd_aead_setkey(struct crypto_aead * tfm,const u8 * key,unsigned int key_len)2681661131aSEric Biggers static int simd_aead_setkey(struct crypto_aead *tfm, const u8 *key,
2691661131aSEric Biggers unsigned int key_len)
2701661131aSEric Biggers {
2711661131aSEric Biggers struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
2721661131aSEric Biggers struct crypto_aead *child = &ctx->cryptd_tfm->base;
2731661131aSEric Biggers
2741661131aSEric Biggers crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK);
2751661131aSEric Biggers crypto_aead_set_flags(child, crypto_aead_get_flags(tfm) &
2761661131aSEric Biggers CRYPTO_TFM_REQ_MASK);
277af5034e8SEric Biggers return crypto_aead_setkey(child, key, key_len);
2781661131aSEric Biggers }
2791661131aSEric Biggers
simd_aead_setauthsize(struct crypto_aead * tfm,unsigned int authsize)2801661131aSEric Biggers static int simd_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
2811661131aSEric Biggers {
2821661131aSEric Biggers struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
2831661131aSEric Biggers struct crypto_aead *child = &ctx->cryptd_tfm->base;
2841661131aSEric Biggers
2851661131aSEric Biggers return crypto_aead_setauthsize(child, authsize);
2861661131aSEric Biggers }
2871661131aSEric Biggers
simd_aead_encrypt(struct aead_request * req)2881661131aSEric Biggers static int simd_aead_encrypt(struct aead_request *req)
2891661131aSEric Biggers {
2901661131aSEric Biggers struct crypto_aead *tfm = crypto_aead_reqtfm(req);
2911661131aSEric Biggers struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
2921661131aSEric Biggers struct aead_request *subreq;
2931661131aSEric Biggers struct crypto_aead *child;
2941661131aSEric Biggers
2951661131aSEric Biggers subreq = aead_request_ctx(req);
2961661131aSEric Biggers *subreq = *req;
2971661131aSEric Biggers
2988b8d91d4SEric Biggers if (!crypto_simd_usable() ||
2991661131aSEric Biggers (in_atomic() && cryptd_aead_queued(ctx->cryptd_tfm)))
3001661131aSEric Biggers child = &ctx->cryptd_tfm->base;
3011661131aSEric Biggers else
3021661131aSEric Biggers child = cryptd_aead_child(ctx->cryptd_tfm);
3031661131aSEric Biggers
3041661131aSEric Biggers aead_request_set_tfm(subreq, child);
3051661131aSEric Biggers
3061661131aSEric Biggers return crypto_aead_encrypt(subreq);
3071661131aSEric Biggers }
3081661131aSEric Biggers
simd_aead_decrypt(struct aead_request * req)3091661131aSEric Biggers static int simd_aead_decrypt(struct aead_request *req)
3101661131aSEric Biggers {
3111661131aSEric Biggers struct crypto_aead *tfm = crypto_aead_reqtfm(req);
3121661131aSEric Biggers struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
3131661131aSEric Biggers struct aead_request *subreq;
3141661131aSEric Biggers struct crypto_aead *child;
3151661131aSEric Biggers
3161661131aSEric Biggers subreq = aead_request_ctx(req);
3171661131aSEric Biggers *subreq = *req;
3181661131aSEric Biggers
3198b8d91d4SEric Biggers if (!crypto_simd_usable() ||
3201661131aSEric Biggers (in_atomic() && cryptd_aead_queued(ctx->cryptd_tfm)))
3211661131aSEric Biggers child = &ctx->cryptd_tfm->base;
3221661131aSEric Biggers else
3231661131aSEric Biggers child = cryptd_aead_child(ctx->cryptd_tfm);
3241661131aSEric Biggers
3251661131aSEric Biggers aead_request_set_tfm(subreq, child);
3261661131aSEric Biggers
3271661131aSEric Biggers return crypto_aead_decrypt(subreq);
3281661131aSEric Biggers }
3291661131aSEric Biggers
simd_aead_exit(struct crypto_aead * tfm)3301661131aSEric Biggers static void simd_aead_exit(struct crypto_aead *tfm)
3311661131aSEric Biggers {
3321661131aSEric Biggers struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
3331661131aSEric Biggers
3341661131aSEric Biggers cryptd_free_aead(ctx->cryptd_tfm);
3351661131aSEric Biggers }
3361661131aSEric Biggers
simd_aead_init(struct crypto_aead * tfm)3371661131aSEric Biggers static int simd_aead_init(struct crypto_aead *tfm)
3381661131aSEric Biggers {
3391661131aSEric Biggers struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
3401661131aSEric Biggers struct cryptd_aead *cryptd_tfm;
3411661131aSEric Biggers struct simd_aead_alg *salg;
3421661131aSEric Biggers struct aead_alg *alg;
3431661131aSEric Biggers unsigned reqsize;
3441661131aSEric Biggers
3451661131aSEric Biggers alg = crypto_aead_alg(tfm);
3461661131aSEric Biggers salg = container_of(alg, struct simd_aead_alg, alg);
3471661131aSEric Biggers
3481661131aSEric Biggers cryptd_tfm = cryptd_alloc_aead(salg->ialg_name, CRYPTO_ALG_INTERNAL,
3491661131aSEric Biggers CRYPTO_ALG_INTERNAL);
3501661131aSEric Biggers if (IS_ERR(cryptd_tfm))
3511661131aSEric Biggers return PTR_ERR(cryptd_tfm);
3521661131aSEric Biggers
3531661131aSEric Biggers ctx->cryptd_tfm = cryptd_tfm;
3541661131aSEric Biggers
3551661131aSEric Biggers reqsize = crypto_aead_reqsize(cryptd_aead_child(cryptd_tfm));
3561661131aSEric Biggers reqsize = max(reqsize, crypto_aead_reqsize(&cryptd_tfm->base));
3571661131aSEric Biggers reqsize += sizeof(struct aead_request);
3581661131aSEric Biggers
3591661131aSEric Biggers crypto_aead_set_reqsize(tfm, reqsize);
3601661131aSEric Biggers
3611661131aSEric Biggers return 0;
3621661131aSEric Biggers }
3631661131aSEric Biggers
simd_aead_create_compat(struct aead_alg * ialg,const char * algname,const char * drvname,const char * basename)364*3c44d31cSHerbert Xu static struct simd_aead_alg *simd_aead_create_compat(struct aead_alg *ialg,
365*3c44d31cSHerbert Xu const char *algname,
3661661131aSEric Biggers const char *drvname,
3671661131aSEric Biggers const char *basename)
3681661131aSEric Biggers {
3691661131aSEric Biggers struct simd_aead_alg *salg;
3701661131aSEric Biggers struct aead_alg *alg;
3711661131aSEric Biggers int err;
3721661131aSEric Biggers
3731661131aSEric Biggers salg = kzalloc(sizeof(*salg), GFP_KERNEL);
3741661131aSEric Biggers if (!salg) {
3751661131aSEric Biggers salg = ERR_PTR(-ENOMEM);
376*3c44d31cSHerbert Xu goto out;
3771661131aSEric Biggers }
3781661131aSEric Biggers
3791661131aSEric Biggers salg->ialg_name = basename;
3801661131aSEric Biggers alg = &salg->alg;
3811661131aSEric Biggers
3821661131aSEric Biggers err = -ENAMETOOLONG;
3831661131aSEric Biggers if (snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", algname) >=
3841661131aSEric Biggers CRYPTO_MAX_ALG_NAME)
3851661131aSEric Biggers goto out_free_salg;
3861661131aSEric Biggers
3871661131aSEric Biggers if (snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
3881661131aSEric Biggers drvname) >= CRYPTO_MAX_ALG_NAME)
3891661131aSEric Biggers goto out_free_salg;
3901661131aSEric Biggers
3917bcb2c99SEric Biggers alg->base.cra_flags = CRYPTO_ALG_ASYNC |
3927bcb2c99SEric Biggers (ialg->base.cra_flags & CRYPTO_ALG_INHERITED_FLAGS);
3931661131aSEric Biggers alg->base.cra_priority = ialg->base.cra_priority;
3941661131aSEric Biggers alg->base.cra_blocksize = ialg->base.cra_blocksize;
3951661131aSEric Biggers alg->base.cra_alignmask = ialg->base.cra_alignmask;
3961661131aSEric Biggers alg->base.cra_module = ialg->base.cra_module;
3971661131aSEric Biggers alg->base.cra_ctxsize = sizeof(struct simd_aead_ctx);
3981661131aSEric Biggers
3991661131aSEric Biggers alg->ivsize = ialg->ivsize;
4001661131aSEric Biggers alg->maxauthsize = ialg->maxauthsize;
4011661131aSEric Biggers alg->chunksize = ialg->chunksize;
4021661131aSEric Biggers
4031661131aSEric Biggers alg->init = simd_aead_init;
4041661131aSEric Biggers alg->exit = simd_aead_exit;
4051661131aSEric Biggers
4061661131aSEric Biggers alg->setkey = simd_aead_setkey;
4071661131aSEric Biggers alg->setauthsize = simd_aead_setauthsize;
4081661131aSEric Biggers alg->encrypt = simd_aead_encrypt;
4091661131aSEric Biggers alg->decrypt = simd_aead_decrypt;
4101661131aSEric Biggers
4111661131aSEric Biggers err = crypto_register_aead(alg);
4121661131aSEric Biggers if (err)
4131661131aSEric Biggers goto out_free_salg;
4141661131aSEric Biggers
415*3c44d31cSHerbert Xu out:
4161661131aSEric Biggers return salg;
4171661131aSEric Biggers
4181661131aSEric Biggers out_free_salg:
4191661131aSEric Biggers kfree(salg);
4201661131aSEric Biggers salg = ERR_PTR(err);
421*3c44d31cSHerbert Xu goto out;
4221661131aSEric Biggers }
4231661131aSEric Biggers
simd_aead_free(struct simd_aead_alg * salg)424*3c44d31cSHerbert Xu static void simd_aead_free(struct simd_aead_alg *salg)
4251661131aSEric Biggers {
4261661131aSEric Biggers crypto_unregister_aead(&salg->alg);
4271661131aSEric Biggers kfree(salg);
4281661131aSEric Biggers }
4291661131aSEric Biggers
simd_register_aeads_compat(struct aead_alg * algs,int count,struct simd_aead_alg ** simd_algs)4301661131aSEric Biggers int simd_register_aeads_compat(struct aead_alg *algs, int count,
4311661131aSEric Biggers struct simd_aead_alg **simd_algs)
4321661131aSEric Biggers {
4331661131aSEric Biggers int err;
4341661131aSEric Biggers int i;
4351661131aSEric Biggers const char *algname;
4361661131aSEric Biggers const char *drvname;
4371661131aSEric Biggers const char *basename;
4381661131aSEric Biggers struct simd_aead_alg *simd;
4391661131aSEric Biggers
4401661131aSEric Biggers err = crypto_register_aeads(algs, count);
4411661131aSEric Biggers if (err)
4421661131aSEric Biggers return err;
4431661131aSEric Biggers
4441661131aSEric Biggers for (i = 0; i < count; i++) {
4451661131aSEric Biggers WARN_ON(strncmp(algs[i].base.cra_name, "__", 2));
4461661131aSEric Biggers WARN_ON(strncmp(algs[i].base.cra_driver_name, "__", 2));
4471661131aSEric Biggers algname = algs[i].base.cra_name + 2;
4481661131aSEric Biggers drvname = algs[i].base.cra_driver_name + 2;
4491661131aSEric Biggers basename = algs[i].base.cra_driver_name;
450*3c44d31cSHerbert Xu simd = simd_aead_create_compat(algs + i, algname, drvname, basename);
4511661131aSEric Biggers err = PTR_ERR(simd);
4521661131aSEric Biggers if (IS_ERR(simd))
4531661131aSEric Biggers goto err_unregister;
4541661131aSEric Biggers simd_algs[i] = simd;
4551661131aSEric Biggers }
4561661131aSEric Biggers return 0;
4571661131aSEric Biggers
4581661131aSEric Biggers err_unregister:
4591661131aSEric Biggers simd_unregister_aeads(algs, count, simd_algs);
4601661131aSEric Biggers return err;
4611661131aSEric Biggers }
4621661131aSEric Biggers EXPORT_SYMBOL_GPL(simd_register_aeads_compat);
4631661131aSEric Biggers
simd_unregister_aeads(struct aead_alg * algs,int count,struct simd_aead_alg ** simd_algs)4641661131aSEric Biggers void simd_unregister_aeads(struct aead_alg *algs, int count,
4651661131aSEric Biggers struct simd_aead_alg **simd_algs)
4661661131aSEric Biggers {
4671661131aSEric Biggers int i;
4681661131aSEric Biggers
4691661131aSEric Biggers crypto_unregister_aeads(algs, count);
4701661131aSEric Biggers
4711661131aSEric Biggers for (i = 0; i < count; i++) {
4721661131aSEric Biggers if (simd_algs[i]) {
4731661131aSEric Biggers simd_aead_free(simd_algs[i]);
4741661131aSEric Biggers simd_algs[i] = NULL;
4751661131aSEric Biggers }
4761661131aSEric Biggers }
4771661131aSEric Biggers }
4781661131aSEric Biggers EXPORT_SYMBOL_GPL(simd_unregister_aeads);
4791661131aSEric Biggers
4807c699fe9SJeff Johnson MODULE_DESCRIPTION("Shared crypto SIMD helpers");
481266d0516SHerbert Xu MODULE_LICENSE("GPL");
482