1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * The AEGIS-128 Authenticated-Encryption Algorithm
4  *
5  * Copyright (c) 2017-2018 Ondrej Mosnacek <omosnacek@gmail.com>
6  * Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
7  */
8 
9 #include <crypto/algapi.h>
10 #include <crypto/internal/aead.h>
11 #include <crypto/internal/simd.h>
12 #include <crypto/internal/skcipher.h>
13 #include <crypto/scatterwalk.h>
14 #include <linux/err.h>
15 #include <linux/init.h>
16 #include <linux/jump_label.h>
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/scatterlist.h>
20 
21 #include <asm/simd.h>
22 
23 #include "aegis.h"
24 
25 #define AEGIS128_NONCE_SIZE 16
26 #define AEGIS128_STATE_BLOCKS 5
27 #define AEGIS128_KEY_SIZE 16
28 #define AEGIS128_MIN_AUTH_SIZE 8
29 #define AEGIS128_MAX_AUTH_SIZE 16
30 
31 struct aegis_state {
32 	union aegis_block blocks[AEGIS128_STATE_BLOCKS];
33 };
34 
35 struct aegis_ctx {
36 	union aegis_block key;
37 };
38 
39 static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_simd);
40 
41 static const union aegis_block crypto_aegis_const[2] = {
42 	{ .words64 = {
43 		cpu_to_le64(U64_C(0x0d08050302010100)),
44 		cpu_to_le64(U64_C(0x6279e99059372215)),
45 	} },
46 	{ .words64 = {
47 		cpu_to_le64(U64_C(0xf12fc26d55183ddb)),
48 		cpu_to_le64(U64_C(0xdd28b57342311120)),
49 	} },
50 };
51 
aegis128_do_simd(void)52 static bool aegis128_do_simd(void)
53 {
54 #ifdef CONFIG_CRYPTO_AEGIS128_SIMD
55 	if (static_branch_likely(&have_simd))
56 		return crypto_simd_usable();
57 #endif
58 	return false;
59 }
60 
crypto_aegis128_update(struct aegis_state * state)61 static void crypto_aegis128_update(struct aegis_state *state)
62 {
63 	union aegis_block tmp;
64 	unsigned int i;
65 
66 	tmp = state->blocks[AEGIS128_STATE_BLOCKS - 1];
67 	for (i = AEGIS128_STATE_BLOCKS - 1; i > 0; i--)
68 		crypto_aegis_aesenc(&state->blocks[i], &state->blocks[i - 1],
69 				    &state->blocks[i]);
70 	crypto_aegis_aesenc(&state->blocks[0], &tmp, &state->blocks[0]);
71 }
72 
crypto_aegis128_update_a(struct aegis_state * state,const union aegis_block * msg,bool do_simd)73 static void crypto_aegis128_update_a(struct aegis_state *state,
74 				     const union aegis_block *msg,
75 				     bool do_simd)
76 {
77 	if (IS_ENABLED(CONFIG_CRYPTO_AEGIS128_SIMD) && do_simd) {
78 		crypto_aegis128_update_simd(state, msg);
79 		return;
80 	}
81 
82 	crypto_aegis128_update(state);
83 	crypto_aegis_block_xor(&state->blocks[0], msg);
84 }
85 
crypto_aegis128_update_u(struct aegis_state * state,const void * msg,bool do_simd)86 static void crypto_aegis128_update_u(struct aegis_state *state, const void *msg,
87 				     bool do_simd)
88 {
89 	if (IS_ENABLED(CONFIG_CRYPTO_AEGIS128_SIMD) && do_simd) {
90 		crypto_aegis128_update_simd(state, msg);
91 		return;
92 	}
93 
94 	crypto_aegis128_update(state);
95 	crypto_xor(state->blocks[0].bytes, msg, AEGIS_BLOCK_SIZE);
96 }
97 
crypto_aegis128_init(struct aegis_state * state,const union aegis_block * key,const u8 * iv)98 static void crypto_aegis128_init(struct aegis_state *state,
99 				 const union aegis_block *key,
100 				 const u8 *iv)
101 {
102 	union aegis_block key_iv;
103 	unsigned int i;
104 
105 	key_iv = *key;
106 	crypto_xor(key_iv.bytes, iv, AEGIS_BLOCK_SIZE);
107 
108 	state->blocks[0] = key_iv;
109 	state->blocks[1] = crypto_aegis_const[1];
110 	state->blocks[2] = crypto_aegis_const[0];
111 	state->blocks[3] = *key;
112 	state->blocks[4] = *key;
113 
114 	crypto_aegis_block_xor(&state->blocks[3], &crypto_aegis_const[0]);
115 	crypto_aegis_block_xor(&state->blocks[4], &crypto_aegis_const[1]);
116 
117 	for (i = 0; i < 5; i++) {
118 		crypto_aegis128_update_a(state, key, false);
119 		crypto_aegis128_update_a(state, &key_iv, false);
120 	}
121 }
122 
crypto_aegis128_ad(struct aegis_state * state,const u8 * src,unsigned int size,bool do_simd)123 static void crypto_aegis128_ad(struct aegis_state *state,
124 			       const u8 *src, unsigned int size,
125 			       bool do_simd)
126 {
127 	if (AEGIS_ALIGNED(src)) {
128 		const union aegis_block *src_blk =
129 				(const union aegis_block *)src;
130 
131 		while (size >= AEGIS_BLOCK_SIZE) {
132 			crypto_aegis128_update_a(state, src_blk, do_simd);
133 
134 			size -= AEGIS_BLOCK_SIZE;
135 			src_blk++;
136 		}
137 	} else {
138 		while (size >= AEGIS_BLOCK_SIZE) {
139 			crypto_aegis128_update_u(state, src, do_simd);
140 
141 			size -= AEGIS_BLOCK_SIZE;
142 			src += AEGIS_BLOCK_SIZE;
143 		}
144 	}
145 }
146 
crypto_aegis128_wipe_chunk(struct aegis_state * state,u8 * dst,const u8 * src,unsigned int size)147 static void crypto_aegis128_wipe_chunk(struct aegis_state *state, u8 *dst,
148 				       const u8 *src, unsigned int size)
149 {
150 	memzero_explicit(dst, size);
151 }
152 
crypto_aegis128_encrypt_chunk(struct aegis_state * state,u8 * dst,const u8 * src,unsigned int size)153 static void crypto_aegis128_encrypt_chunk(struct aegis_state *state, u8 *dst,
154 					  const u8 *src, unsigned int size)
155 {
156 	union aegis_block tmp;
157 
158 	if (AEGIS_ALIGNED(src) && AEGIS_ALIGNED(dst)) {
159 		while (size >= AEGIS_BLOCK_SIZE) {
160 			union aegis_block *dst_blk =
161 					(union aegis_block *)dst;
162 			const union aegis_block *src_blk =
163 					(const union aegis_block *)src;
164 
165 			tmp = state->blocks[2];
166 			crypto_aegis_block_and(&tmp, &state->blocks[3]);
167 			crypto_aegis_block_xor(&tmp, &state->blocks[4]);
168 			crypto_aegis_block_xor(&tmp, &state->blocks[1]);
169 			crypto_aegis_block_xor(&tmp, src_blk);
170 
171 			crypto_aegis128_update_a(state, src_blk, false);
172 
173 			*dst_blk = tmp;
174 
175 			size -= AEGIS_BLOCK_SIZE;
176 			src += AEGIS_BLOCK_SIZE;
177 			dst += AEGIS_BLOCK_SIZE;
178 		}
179 	} else {
180 		while (size >= AEGIS_BLOCK_SIZE) {
181 			tmp = state->blocks[2];
182 			crypto_aegis_block_and(&tmp, &state->blocks[3]);
183 			crypto_aegis_block_xor(&tmp, &state->blocks[4]);
184 			crypto_aegis_block_xor(&tmp, &state->blocks[1]);
185 			crypto_xor(tmp.bytes, src, AEGIS_BLOCK_SIZE);
186 
187 			crypto_aegis128_update_u(state, src, false);
188 
189 			memcpy(dst, tmp.bytes, AEGIS_BLOCK_SIZE);
190 
191 			size -= AEGIS_BLOCK_SIZE;
192 			src += AEGIS_BLOCK_SIZE;
193 			dst += AEGIS_BLOCK_SIZE;
194 		}
195 	}
196 
197 	if (size > 0) {
198 		union aegis_block msg = {};
199 		memcpy(msg.bytes, src, size);
200 
201 		tmp = state->blocks[2];
202 		crypto_aegis_block_and(&tmp, &state->blocks[3]);
203 		crypto_aegis_block_xor(&tmp, &state->blocks[4]);
204 		crypto_aegis_block_xor(&tmp, &state->blocks[1]);
205 
206 		crypto_aegis128_update_a(state, &msg, false);
207 
208 		crypto_aegis_block_xor(&msg, &tmp);
209 
210 		memcpy(dst, msg.bytes, size);
211 	}
212 }
213 
crypto_aegis128_decrypt_chunk(struct aegis_state * state,u8 * dst,const u8 * src,unsigned int size)214 static void crypto_aegis128_decrypt_chunk(struct aegis_state *state, u8 *dst,
215 					  const u8 *src, unsigned int size)
216 {
217 	union aegis_block tmp;
218 
219 	if (AEGIS_ALIGNED(src) && AEGIS_ALIGNED(dst)) {
220 		while (size >= AEGIS_BLOCK_SIZE) {
221 			union aegis_block *dst_blk =
222 					(union aegis_block *)dst;
223 			const union aegis_block *src_blk =
224 					(const union aegis_block *)src;
225 
226 			tmp = state->blocks[2];
227 			crypto_aegis_block_and(&tmp, &state->blocks[3]);
228 			crypto_aegis_block_xor(&tmp, &state->blocks[4]);
229 			crypto_aegis_block_xor(&tmp, &state->blocks[1]);
230 			crypto_aegis_block_xor(&tmp, src_blk);
231 
232 			crypto_aegis128_update_a(state, &tmp, false);
233 
234 			*dst_blk = tmp;
235 
236 			size -= AEGIS_BLOCK_SIZE;
237 			src += AEGIS_BLOCK_SIZE;
238 			dst += AEGIS_BLOCK_SIZE;
239 		}
240 	} else {
241 		while (size >= AEGIS_BLOCK_SIZE) {
242 			tmp = state->blocks[2];
243 			crypto_aegis_block_and(&tmp, &state->blocks[3]);
244 			crypto_aegis_block_xor(&tmp, &state->blocks[4]);
245 			crypto_aegis_block_xor(&tmp, &state->blocks[1]);
246 			crypto_xor(tmp.bytes, src, AEGIS_BLOCK_SIZE);
247 
248 			crypto_aegis128_update_a(state, &tmp, false);
249 
250 			memcpy(dst, tmp.bytes, AEGIS_BLOCK_SIZE);
251 
252 			size -= AEGIS_BLOCK_SIZE;
253 			src += AEGIS_BLOCK_SIZE;
254 			dst += AEGIS_BLOCK_SIZE;
255 		}
256 	}
257 
258 	if (size > 0) {
259 		union aegis_block msg = {};
260 		memcpy(msg.bytes, src, size);
261 
262 		tmp = state->blocks[2];
263 		crypto_aegis_block_and(&tmp, &state->blocks[3]);
264 		crypto_aegis_block_xor(&tmp, &state->blocks[4]);
265 		crypto_aegis_block_xor(&tmp, &state->blocks[1]);
266 		crypto_aegis_block_xor(&msg, &tmp);
267 
268 		memset(msg.bytes + size, 0, AEGIS_BLOCK_SIZE - size);
269 
270 		crypto_aegis128_update_a(state, &msg, false);
271 
272 		memcpy(dst, msg.bytes, size);
273 	}
274 }
275 
crypto_aegis128_process_ad(struct aegis_state * state,struct scatterlist * sg_src,unsigned int assoclen,bool do_simd)276 static void crypto_aegis128_process_ad(struct aegis_state *state,
277 				       struct scatterlist *sg_src,
278 				       unsigned int assoclen,
279 				       bool do_simd)
280 {
281 	struct scatter_walk walk;
282 	union aegis_block buf;
283 	unsigned int pos = 0;
284 
285 	scatterwalk_start(&walk, sg_src);
286 	while (assoclen != 0) {
287 		unsigned int size = scatterwalk_next(&walk, assoclen);
288 		const u8 *src = walk.addr;
289 		unsigned int left = size;
290 
291 		if (pos + size >= AEGIS_BLOCK_SIZE) {
292 			if (pos > 0) {
293 				unsigned int fill = AEGIS_BLOCK_SIZE - pos;
294 				memcpy(buf.bytes + pos, src, fill);
295 				crypto_aegis128_update_a(state, &buf, do_simd);
296 				pos = 0;
297 				left -= fill;
298 				src += fill;
299 			}
300 
301 			crypto_aegis128_ad(state, src, left, do_simd);
302 			src += left & ~(AEGIS_BLOCK_SIZE - 1);
303 			left &= AEGIS_BLOCK_SIZE - 1;
304 		}
305 
306 		memcpy(buf.bytes + pos, src, left);
307 
308 		pos += left;
309 		assoclen -= size;
310 		scatterwalk_done_src(&walk, size);
311 	}
312 
313 	if (pos > 0) {
314 		memset(buf.bytes + pos, 0, AEGIS_BLOCK_SIZE - pos);
315 		crypto_aegis128_update_a(state, &buf, do_simd);
316 	}
317 }
318 
319 static __always_inline
crypto_aegis128_process_crypt(struct aegis_state * state,struct skcipher_walk * walk,void (* crypt)(struct aegis_state * state,u8 * dst,const u8 * src,unsigned int size))320 int crypto_aegis128_process_crypt(struct aegis_state *state,
321 				  struct skcipher_walk *walk,
322 				  void (*crypt)(struct aegis_state *state,
323 						u8 *dst,
324 						const u8 *src,
325 						unsigned int size))
326 {
327 	int err = 0;
328 
329 	while (walk->nbytes) {
330 		unsigned int nbytes = walk->nbytes;
331 
332 		if (nbytes < walk->total)
333 			nbytes = round_down(nbytes, walk->stride);
334 
335 		crypt(state, walk->dst.virt.addr, walk->src.virt.addr, nbytes);
336 
337 		err = skcipher_walk_done(walk, walk->nbytes - nbytes);
338 	}
339 	return err;
340 }
341 
crypto_aegis128_final(struct aegis_state * state,union aegis_block * tag_xor,u64 assoclen,u64 cryptlen)342 static void crypto_aegis128_final(struct aegis_state *state,
343 				  union aegis_block *tag_xor,
344 				  u64 assoclen, u64 cryptlen)
345 {
346 	u64 assocbits = assoclen * 8;
347 	u64 cryptbits = cryptlen * 8;
348 
349 	union aegis_block tmp;
350 	unsigned int i;
351 
352 	tmp.words64[0] = cpu_to_le64(assocbits);
353 	tmp.words64[1] = cpu_to_le64(cryptbits);
354 
355 	crypto_aegis_block_xor(&tmp, &state->blocks[3]);
356 
357 	for (i = 0; i < 7; i++)
358 		crypto_aegis128_update_a(state, &tmp, false);
359 
360 	for (i = 0; i < AEGIS128_STATE_BLOCKS; i++)
361 		crypto_aegis_block_xor(tag_xor, &state->blocks[i]);
362 }
363 
crypto_aegis128_setkey(struct crypto_aead * aead,const u8 * key,unsigned int keylen)364 static int crypto_aegis128_setkey(struct crypto_aead *aead, const u8 *key,
365 				  unsigned int keylen)
366 {
367 	struct aegis_ctx *ctx = crypto_aead_ctx(aead);
368 
369 	if (keylen != AEGIS128_KEY_SIZE)
370 		return -EINVAL;
371 
372 	memcpy(ctx->key.bytes, key, AEGIS128_KEY_SIZE);
373 	return 0;
374 }
375 
crypto_aegis128_setauthsize(struct crypto_aead * tfm,unsigned int authsize)376 static int crypto_aegis128_setauthsize(struct crypto_aead *tfm,
377 				       unsigned int authsize)
378 {
379 	if (authsize > AEGIS128_MAX_AUTH_SIZE)
380 		return -EINVAL;
381 	if (authsize < AEGIS128_MIN_AUTH_SIZE)
382 		return -EINVAL;
383 	return 0;
384 }
385 
crypto_aegis128_encrypt_generic(struct aead_request * req)386 static int crypto_aegis128_encrypt_generic(struct aead_request *req)
387 {
388 	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
389 	union aegis_block tag = {};
390 	unsigned int authsize = crypto_aead_authsize(tfm);
391 	struct aegis_ctx *ctx = crypto_aead_ctx(tfm);
392 	unsigned int cryptlen = req->cryptlen;
393 	struct skcipher_walk walk;
394 	struct aegis_state state;
395 
396 	skcipher_walk_aead_encrypt(&walk, req, false);
397 	crypto_aegis128_init(&state, &ctx->key, req->iv);
398 	crypto_aegis128_process_ad(&state, req->src, req->assoclen, false);
399 	crypto_aegis128_process_crypt(&state, &walk,
400 				      crypto_aegis128_encrypt_chunk);
401 	crypto_aegis128_final(&state, &tag, req->assoclen, cryptlen);
402 
403 	scatterwalk_map_and_copy(tag.bytes, req->dst, req->assoclen + cryptlen,
404 				 authsize, 1);
405 	return 0;
406 }
407 
crypto_aegis128_decrypt_generic(struct aead_request * req)408 static int crypto_aegis128_decrypt_generic(struct aead_request *req)
409 {
410 	static const u8 zeros[AEGIS128_MAX_AUTH_SIZE] = {};
411 	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
412 	union aegis_block tag;
413 	unsigned int authsize = crypto_aead_authsize(tfm);
414 	unsigned int cryptlen = req->cryptlen - authsize;
415 	struct aegis_ctx *ctx = crypto_aead_ctx(tfm);
416 	struct skcipher_walk walk;
417 	struct aegis_state state;
418 
419 	scatterwalk_map_and_copy(tag.bytes, req->src, req->assoclen + cryptlen,
420 				 authsize, 0);
421 
422 	skcipher_walk_aead_decrypt(&walk, req, false);
423 	crypto_aegis128_init(&state, &ctx->key, req->iv);
424 	crypto_aegis128_process_ad(&state, req->src, req->assoclen, false);
425 	crypto_aegis128_process_crypt(&state, &walk,
426 				      crypto_aegis128_decrypt_chunk);
427 	crypto_aegis128_final(&state, &tag, req->assoclen, cryptlen);
428 
429 	if (unlikely(crypto_memneq(tag.bytes, zeros, authsize))) {
430 		/*
431 		 * From Chapter 4. 'Security Analysis' of the AEGIS spec [0]
432 		 *
433 		 * "3. If verification fails, the decrypted plaintext and the
434 		 *     wrong authentication tag should not be given as output."
435 		 *
436 		 * [0] https://competitions.cr.yp.to/round3/aegisv11.pdf
437 		 */
438 		skcipher_walk_aead_decrypt(&walk, req, false);
439 		crypto_aegis128_process_crypt(NULL, &walk,
440 					      crypto_aegis128_wipe_chunk);
441 		memzero_explicit(&tag, sizeof(tag));
442 		return -EBADMSG;
443 	}
444 	return 0;
445 }
446 
crypto_aegis128_encrypt_simd(struct aead_request * req)447 static int crypto_aegis128_encrypt_simd(struct aead_request *req)
448 {
449 	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
450 	union aegis_block tag = {};
451 	unsigned int authsize = crypto_aead_authsize(tfm);
452 	struct aegis_ctx *ctx = crypto_aead_ctx(tfm);
453 	unsigned int cryptlen = req->cryptlen;
454 	struct skcipher_walk walk;
455 	struct aegis_state state;
456 
457 	if (!aegis128_do_simd())
458 		return crypto_aegis128_encrypt_generic(req);
459 
460 	skcipher_walk_aead_encrypt(&walk, req, false);
461 	crypto_aegis128_init_simd(&state, &ctx->key, req->iv);
462 	crypto_aegis128_process_ad(&state, req->src, req->assoclen, true);
463 	crypto_aegis128_process_crypt(&state, &walk,
464 				      crypto_aegis128_encrypt_chunk_simd);
465 	crypto_aegis128_final_simd(&state, &tag, req->assoclen, cryptlen, 0);
466 
467 	scatterwalk_map_and_copy(tag.bytes, req->dst, req->assoclen + cryptlen,
468 				 authsize, 1);
469 	return 0;
470 }
471 
crypto_aegis128_decrypt_simd(struct aead_request * req)472 static int crypto_aegis128_decrypt_simd(struct aead_request *req)
473 {
474 	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
475 	union aegis_block tag;
476 	unsigned int authsize = crypto_aead_authsize(tfm);
477 	unsigned int cryptlen = req->cryptlen - authsize;
478 	struct aegis_ctx *ctx = crypto_aead_ctx(tfm);
479 	struct skcipher_walk walk;
480 	struct aegis_state state;
481 
482 	if (!aegis128_do_simd())
483 		return crypto_aegis128_decrypt_generic(req);
484 
485 	scatterwalk_map_and_copy(tag.bytes, req->src, req->assoclen + cryptlen,
486 				 authsize, 0);
487 
488 	skcipher_walk_aead_decrypt(&walk, req, false);
489 	crypto_aegis128_init_simd(&state, &ctx->key, req->iv);
490 	crypto_aegis128_process_ad(&state, req->src, req->assoclen, true);
491 	crypto_aegis128_process_crypt(&state, &walk,
492 				      crypto_aegis128_decrypt_chunk_simd);
493 
494 	if (unlikely(crypto_aegis128_final_simd(&state, &tag, req->assoclen,
495 						cryptlen, authsize))) {
496 		skcipher_walk_aead_decrypt(&walk, req, false);
497 		crypto_aegis128_process_crypt(NULL, &walk,
498 					      crypto_aegis128_wipe_chunk);
499 		return -EBADMSG;
500 	}
501 	return 0;
502 }
503 
504 static struct aead_alg crypto_aegis128_alg_generic = {
505 	.setkey			= crypto_aegis128_setkey,
506 	.setauthsize		= crypto_aegis128_setauthsize,
507 	.encrypt		= crypto_aegis128_encrypt_generic,
508 	.decrypt		= crypto_aegis128_decrypt_generic,
509 
510 	.ivsize			= AEGIS128_NONCE_SIZE,
511 	.maxauthsize		= AEGIS128_MAX_AUTH_SIZE,
512 	.chunksize		= AEGIS_BLOCK_SIZE,
513 
514 	.base.cra_blocksize	= 1,
515 	.base.cra_ctxsize	= sizeof(struct aegis_ctx),
516 	.base.cra_priority	= 100,
517 	.base.cra_name		= "aegis128",
518 	.base.cra_driver_name	= "aegis128-generic",
519 	.base.cra_module	= THIS_MODULE,
520 };
521 
522 static struct aead_alg crypto_aegis128_alg_simd = {
523 	.setkey			= crypto_aegis128_setkey,
524 	.setauthsize		= crypto_aegis128_setauthsize,
525 	.encrypt		= crypto_aegis128_encrypt_simd,
526 	.decrypt		= crypto_aegis128_decrypt_simd,
527 
528 	.ivsize			= AEGIS128_NONCE_SIZE,
529 	.maxauthsize		= AEGIS128_MAX_AUTH_SIZE,
530 	.chunksize		= AEGIS_BLOCK_SIZE,
531 
532 	.base.cra_blocksize	= 1,
533 	.base.cra_ctxsize	= sizeof(struct aegis_ctx),
534 	.base.cra_priority	= 200,
535 	.base.cra_name		= "aegis128",
536 	.base.cra_driver_name	= "aegis128-simd",
537 	.base.cra_module	= THIS_MODULE,
538 };
539 
crypto_aegis128_module_init(void)540 static int __init crypto_aegis128_module_init(void)
541 {
542 	int ret;
543 
544 	ret = crypto_register_aead(&crypto_aegis128_alg_generic);
545 	if (ret)
546 		return ret;
547 
548 	if (IS_ENABLED(CONFIG_CRYPTO_AEGIS128_SIMD) &&
549 	    crypto_aegis128_have_simd()) {
550 		ret = crypto_register_aead(&crypto_aegis128_alg_simd);
551 		if (ret) {
552 			crypto_unregister_aead(&crypto_aegis128_alg_generic);
553 			return ret;
554 		}
555 		static_branch_enable(&have_simd);
556 	}
557 	return 0;
558 }
559 
crypto_aegis128_module_exit(void)560 static void __exit crypto_aegis128_module_exit(void)
561 {
562 	if (IS_ENABLED(CONFIG_CRYPTO_AEGIS128_SIMD) &&
563 	    crypto_aegis128_have_simd())
564 		crypto_unregister_aead(&crypto_aegis128_alg_simd);
565 
566 	crypto_unregister_aead(&crypto_aegis128_alg_generic);
567 }
568 
569 subsys_initcall(crypto_aegis128_module_init);
570 module_exit(crypto_aegis128_module_exit);
571 
572 MODULE_LICENSE("GPL");
573 MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>");
574 MODULE_DESCRIPTION("AEGIS-128 AEAD algorithm");
575 MODULE_ALIAS_CRYPTO("aegis128");
576 MODULE_ALIAS_CRYPTO("aegis128-generic");
577 MODULE_ALIAS_CRYPTO("aegis128-simd");
578