~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/crypto/morus1280.c

Version: ~ [ linux-5.1-rc1 ] ~ [ linux-5.0.3 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.30 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.107 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.164 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.176 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.136 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.63 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  * The MORUS-1280 Authenticated-Encryption Algorithm
  4  *
  5  * Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
  6  * Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
  7  */
  8 
  9 #include <asm/unaligned.h>
 10 #include <crypto/algapi.h>
 11 #include <crypto/internal/aead.h>
 12 #include <crypto/internal/skcipher.h>
 13 #include <crypto/morus_common.h>
 14 #include <crypto/scatterwalk.h>
 15 #include <linux/err.h>
 16 #include <linux/init.h>
 17 #include <linux/kernel.h>
 18 #include <linux/module.h>
 19 #include <linux/scatterlist.h>
 20 
 21 #define MORUS1280_WORD_SIZE 8
 22 #define MORUS1280_BLOCK_SIZE (MORUS_BLOCK_WORDS * MORUS1280_WORD_SIZE)
 23 #define MORUS1280_BLOCK_ALIGN (__alignof__(__le64))
 24 #define MORUS1280_ALIGNED(p) IS_ALIGNED((uintptr_t)p, MORUS1280_BLOCK_ALIGN)
 25 
 26 struct morus1280_block {
 27         u64 words[MORUS_BLOCK_WORDS];
 28 };
 29 
 30 union morus1280_block_in {
 31         __le64 words[MORUS_BLOCK_WORDS];
 32         u8 bytes[MORUS1280_BLOCK_SIZE];
 33 };
 34 
 35 struct morus1280_state {
 36         struct morus1280_block s[MORUS_STATE_BLOCKS];
 37 };
 38 
 39 struct morus1280_ctx {
 40         struct morus1280_block key;
 41 };
 42 
 43 struct morus1280_ops {
 44         int (*skcipher_walk_init)(struct skcipher_walk *walk,
 45                                   struct aead_request *req, bool atomic);
 46 
 47         void (*crypt_chunk)(struct morus1280_state *state,
 48                             u8 *dst, const u8 *src, unsigned int size);
 49 };
 50 
 51 static const struct morus1280_block crypto_morus1280_const[1] = {
 52         { .words = {
 53                 U64_C(0x0d08050302010100),
 54                 U64_C(0x6279e99059372215),
 55                 U64_C(0xf12fc26d55183ddb),
 56                 U64_C(0xdd28b57342311120),
 57         } },
 58 };
 59 
 60 static void crypto_morus1280_round(struct morus1280_block *b0,
 61                                    struct morus1280_block *b1,
 62                                    struct morus1280_block *b2,
 63                                    struct morus1280_block *b3,
 64                                    struct morus1280_block *b4,
 65                                    const struct morus1280_block *m,
 66                                    unsigned int b, unsigned int w)
 67 {
 68         unsigned int i;
 69         struct morus1280_block tmp;
 70 
 71         for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
 72                 b0->words[i] ^= b1->words[i] & b2->words[i];
 73                 b0->words[i] ^= b3->words[i];
 74                 b0->words[i] ^= m->words[i];
 75                 b0->words[i] = rol64(b0->words[i], b);
 76         }
 77 
 78         tmp = *b3;
 79         for (i = 0; i < MORUS_BLOCK_WORDS; i++)
 80                 b3->words[(i + w) % MORUS_BLOCK_WORDS] = tmp.words[i];
 81 }
 82 
 83 static void crypto_morus1280_update(struct morus1280_state *state,
 84                                     const struct morus1280_block *m)
 85 {
 86         static const struct morus1280_block z = {};
 87 
 88         struct morus1280_block *s = state->s;
 89 
 90         crypto_morus1280_round(&s[0], &s[1], &s[2], &s[3], &s[4], &z, 13, 1);
 91         crypto_morus1280_round(&s[1], &s[2], &s[3], &s[4], &s[0], m,  46, 2);
 92         crypto_morus1280_round(&s[2], &s[3], &s[4], &s[0], &s[1], m,  38, 3);
 93         crypto_morus1280_round(&s[3], &s[4], &s[0], &s[1], &s[2], m,   7, 2);
 94         crypto_morus1280_round(&s[4], &s[0], &s[1], &s[2], &s[3], m,   4, 1);
 95 }
 96 
 97 static void crypto_morus1280_load_a(struct morus1280_block *dst, const u8 *src)
 98 {
 99         unsigned int i;
100         for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
101                 dst->words[i] = le64_to_cpu(*(const __le64 *)src);
102                 src += MORUS1280_WORD_SIZE;
103         }
104 }
105 
106 static void crypto_morus1280_load_u(struct morus1280_block *dst, const u8 *src)
107 {
108         unsigned int i;
109         for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
110                 dst->words[i] = get_unaligned_le64(src);
111                 src += MORUS1280_WORD_SIZE;
112         }
113 }
114 
115 static void crypto_morus1280_load(struct morus1280_block *dst, const u8 *src)
116 {
117         if (MORUS1280_ALIGNED(src))
118                 crypto_morus1280_load_a(dst, src);
119         else
120                 crypto_morus1280_load_u(dst, src);
121 }
122 
123 static void crypto_morus1280_store_a(u8 *dst, const struct morus1280_block *src)
124 {
125         unsigned int i;
126         for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
127                 *(__le64 *)dst = cpu_to_le64(src->words[i]);
128                 dst += MORUS1280_WORD_SIZE;
129         }
130 }
131 
132 static void crypto_morus1280_store_u(u8 *dst, const struct morus1280_block *src)
133 {
134         unsigned int i;
135         for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
136                 put_unaligned_le64(src->words[i], dst);
137                 dst += MORUS1280_WORD_SIZE;
138         }
139 }
140 
141 static void crypto_morus1280_store(u8 *dst, const struct morus1280_block *src)
142 {
143         if (MORUS1280_ALIGNED(dst))
144                 crypto_morus1280_store_a(dst, src);
145         else
146                 crypto_morus1280_store_u(dst, src);
147 }
148 
149 static void crypto_morus1280_ad(struct morus1280_state *state, const u8 *src,
150                                 unsigned int size)
151 {
152         struct morus1280_block m;
153 
154         if (MORUS1280_ALIGNED(src)) {
155                 while (size >= MORUS1280_BLOCK_SIZE) {
156                         crypto_morus1280_load_a(&m, src);
157                         crypto_morus1280_update(state, &m);
158 
159                         size -= MORUS1280_BLOCK_SIZE;
160                         src += MORUS1280_BLOCK_SIZE;
161                 }
162         } else {
163                 while (size >= MORUS1280_BLOCK_SIZE) {
164                         crypto_morus1280_load_u(&m, src);
165                         crypto_morus1280_update(state, &m);
166 
167                         size -= MORUS1280_BLOCK_SIZE;
168                         src += MORUS1280_BLOCK_SIZE;
169                 }
170         }
171 }
172 
173 static void crypto_morus1280_core(const struct morus1280_state *state,
174                                   struct morus1280_block *blk)
175 {
176         unsigned int i;
177 
178         for (i = 0; i < MORUS_BLOCK_WORDS; i++)
179                 blk->words[(i + 3) % MORUS_BLOCK_WORDS] ^= state->s[1].words[i];
180 
181         for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
182                 blk->words[i] ^= state->s[0].words[i];
183                 blk->words[i] ^= state->s[2].words[i] & state->s[3].words[i];
184         }
185 }
186 
187 static void crypto_morus1280_encrypt_chunk(struct morus1280_state *state,
188                                            u8 *dst, const u8 *src,
189                                            unsigned int size)
190 {
191         struct morus1280_block c, m;
192 
193         if (MORUS1280_ALIGNED(src) && MORUS1280_ALIGNED(dst)) {
194                 while (size >= MORUS1280_BLOCK_SIZE) {
195                         crypto_morus1280_load_a(&m, src);
196                         c = m;
197                         crypto_morus1280_core(state, &c);
198                         crypto_morus1280_store_a(dst, &c);
199                         crypto_morus1280_update(state, &m);
200 
201                         src += MORUS1280_BLOCK_SIZE;
202                         dst += MORUS1280_BLOCK_SIZE;
203                         size -= MORUS1280_BLOCK_SIZE;
204                 }
205         } else {
206                 while (size >= MORUS1280_BLOCK_SIZE) {
207                         crypto_morus1280_load_u(&m, src);
208                         c = m;
209                         crypto_morus1280_core(state, &c);
210                         crypto_morus1280_store_u(dst, &c);
211                         crypto_morus1280_update(state, &m);
212 
213                         src += MORUS1280_BLOCK_SIZE;
214                         dst += MORUS1280_BLOCK_SIZE;
215                         size -= MORUS1280_BLOCK_SIZE;
216                 }
217         }
218 
219         if (size > 0) {
220                 union morus1280_block_in tail;
221 
222                 memcpy(tail.bytes, src, size);
223                 memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
224 
225                 crypto_morus1280_load_a(&m, tail.bytes);
226                 c = m;
227                 crypto_morus1280_core(state, &c);
228                 crypto_morus1280_store_a(tail.bytes, &c);
229                 crypto_morus1280_update(state, &m);
230 
231                 memcpy(dst, tail.bytes, size);
232         }
233 }
234 
235 static void crypto_morus1280_decrypt_chunk(struct morus1280_state *state,
236                                            u8 *dst, const u8 *src,
237                                            unsigned int size)
238 {
239         struct morus1280_block m;
240 
241         if (MORUS1280_ALIGNED(src) && MORUS1280_ALIGNED(dst)) {
242                 while (size >= MORUS1280_BLOCK_SIZE) {
243                         crypto_morus1280_load_a(&m, src);
244                         crypto_morus1280_core(state, &m);
245                         crypto_morus1280_store_a(dst, &m);
246                         crypto_morus1280_update(state, &m);
247 
248                         src += MORUS1280_BLOCK_SIZE;
249                         dst += MORUS1280_BLOCK_SIZE;
250                         size -= MORUS1280_BLOCK_SIZE;
251                 }
252         } else {
253                 while (size >= MORUS1280_BLOCK_SIZE) {
254                         crypto_morus1280_load_u(&m, src);
255                         crypto_morus1280_core(state, &m);
256                         crypto_morus1280_store_u(dst, &m);
257                         crypto_morus1280_update(state, &m);
258 
259                         src += MORUS1280_BLOCK_SIZE;
260                         dst += MORUS1280_BLOCK_SIZE;
261                         size -= MORUS1280_BLOCK_SIZE;
262                 }
263         }
264 
265         if (size > 0) {
266                 union morus1280_block_in tail;
267 
268                 memcpy(tail.bytes, src, size);
269                 memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
270 
271                 crypto_morus1280_load_a(&m, tail.bytes);
272                 crypto_morus1280_core(state, &m);
273                 crypto_morus1280_store_a(tail.bytes, &m);
274                 memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
275                 crypto_morus1280_load_a(&m, tail.bytes);
276                 crypto_morus1280_update(state, &m);
277 
278                 memcpy(dst, tail.bytes, size);
279         }
280 }
281 
282 static void crypto_morus1280_init(struct morus1280_state *state,
283                                   const struct morus1280_block *key,
284                                   const u8 *iv)
285 {
286         static const struct morus1280_block z = {};
287 
288         union morus1280_block_in tmp;
289         unsigned int i;
290 
291         memcpy(tmp.bytes, iv, MORUS_NONCE_SIZE);
292         memset(tmp.bytes + MORUS_NONCE_SIZE, 0,
293                MORUS1280_BLOCK_SIZE - MORUS_NONCE_SIZE);
294 
295         crypto_morus1280_load(&state->s[0], tmp.bytes);
296         state->s[1] = *key;
297         for (i = 0; i < MORUS_BLOCK_WORDS; i++)
298                 state->s[2].words[i] = U64_C(0xFFFFFFFFFFFFFFFF);
299         state->s[3] = z;
300         state->s[4] = crypto_morus1280_const[0];
301 
302         for (i = 0; i < 16; i++)
303                 crypto_morus1280_update(state, &z);
304 
305         for (i = 0; i < MORUS_BLOCK_WORDS; i++)
306                 state->s[1].words[i] ^= key->words[i];
307 }
308 
309 static void crypto_morus1280_process_ad(struct morus1280_state *state,
310                                         struct scatterlist *sg_src,
311                                         unsigned int assoclen)
312 {
313         struct scatter_walk walk;
314         struct morus1280_block m;
315         union morus1280_block_in buf;
316         unsigned int pos = 0;
317 
318         scatterwalk_start(&walk, sg_src);
319         while (assoclen != 0) {
320                 unsigned int size = scatterwalk_clamp(&walk, assoclen);
321                 unsigned int left = size;
322                 void *mapped = scatterwalk_map(&walk);
323                 const u8 *src = (const u8 *)mapped;
324 
325                 if (pos + size >= MORUS1280_BLOCK_SIZE) {
326                         if (pos > 0) {
327                                 unsigned int fill = MORUS1280_BLOCK_SIZE - pos;
328                                 memcpy(buf.bytes + pos, src, fill);
329 
330                                 crypto_morus1280_load_a(&m, buf.bytes);
331                                 crypto_morus1280_update(state, &m);
332 
333                                 pos = 0;
334                                 left -= fill;
335                                 src += fill;
336                         }
337 
338                         crypto_morus1280_ad(state, src, left);
339                         src += left & ~(MORUS1280_BLOCK_SIZE - 1);
340                         left &= MORUS1280_BLOCK_SIZE - 1;
341                 }
342 
343                 memcpy(buf.bytes + pos, src, left);
344 
345                 pos += left;
346                 assoclen -= size;
347                 scatterwalk_unmap(mapped);
348                 scatterwalk_advance(&walk, size);
349                 scatterwalk_done(&walk, 0, assoclen);
350         }
351 
352         if (pos > 0) {
353                 memset(buf.bytes + pos, 0, MORUS1280_BLOCK_SIZE - pos);
354 
355                 crypto_morus1280_load_a(&m, buf.bytes);
356                 crypto_morus1280_update(state, &m);
357         }
358 }
359 
360 static void crypto_morus1280_process_crypt(struct morus1280_state *state,
361                                            struct aead_request *req,
362                                            const struct morus1280_ops *ops)
363 {
364         struct skcipher_walk walk;
365 
366         ops->skcipher_walk_init(&walk, req, false);
367 
368         while (walk.nbytes) {
369                 unsigned int nbytes = walk.nbytes;
370 
371                 if (nbytes < walk.total)
372                         nbytes = round_down(nbytes, walk.stride);
373 
374                 ops->crypt_chunk(state, walk.dst.virt.addr, walk.src.virt.addr,
375                                  nbytes);
376 
377                 skcipher_walk_done(&walk, walk.nbytes - nbytes);
378         }
379 }
380 
381 static void crypto_morus1280_final(struct morus1280_state *state,
382                                    struct morus1280_block *tag_xor,
383                                    u64 assoclen, u64 cryptlen)
384 {
385         struct morus1280_block tmp;
386         unsigned int i;
387 
388         tmp.words[0] = assoclen * 8;
389         tmp.words[1] = cryptlen * 8;
390         tmp.words[2] = 0;
391         tmp.words[3] = 0;
392 
393         for (i = 0; i < MORUS_BLOCK_WORDS; i++)
394                 state->s[4].words[i] ^= state->s[0].words[i];
395 
396         for (i = 0; i < 10; i++)
397                 crypto_morus1280_update(state, &tmp);
398 
399         crypto_morus1280_core(state, tag_xor);
400 }
401 
402 static int crypto_morus1280_setkey(struct crypto_aead *aead, const u8 *key,
403                                    unsigned int keylen)
404 {
405         struct morus1280_ctx *ctx = crypto_aead_ctx(aead);
406         union morus1280_block_in tmp;
407 
408         if (keylen == MORUS1280_BLOCK_SIZE)
409                 crypto_morus1280_load(&ctx->key, key);
410         else if (keylen == MORUS1280_BLOCK_SIZE / 2) {
411                 memcpy(tmp.bytes, key, keylen);
412                 memcpy(tmp.bytes + keylen, key, keylen);
413 
414                 crypto_morus1280_load(&ctx->key, tmp.bytes);
415         } else {
416                 crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
417                 return -EINVAL;
418         }
419 
420         return 0;
421 }
422 
423 static int crypto_morus1280_setauthsize(struct crypto_aead *tfm,
424                                         unsigned int authsize)
425 {
426         return (authsize <= MORUS_MAX_AUTH_SIZE) ? 0 : -EINVAL;
427 }
428 
429 static void crypto_morus1280_crypt(struct aead_request *req,
430                                    struct morus1280_block *tag_xor,
431                                    unsigned int cryptlen,
432                                    const struct morus1280_ops *ops)
433 {
434         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
435         struct morus1280_ctx *ctx = crypto_aead_ctx(tfm);
436         struct morus1280_state state;
437 
438         crypto_morus1280_init(&state, &ctx->key, req->iv);
439         crypto_morus1280_process_ad(&state, req->src, req->assoclen);
440         crypto_morus1280_process_crypt(&state, req, ops);
441         crypto_morus1280_final(&state, tag_xor, req->assoclen, cryptlen);
442 }
443 
444 static int crypto_morus1280_encrypt(struct aead_request *req)
445 {
446         static const struct morus1280_ops ops = {
447                 .skcipher_walk_init = skcipher_walk_aead_encrypt,
448                 .crypt_chunk = crypto_morus1280_encrypt_chunk,
449         };
450 
451         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
452         struct morus1280_block tag = {};
453         union morus1280_block_in tag_out;
454         unsigned int authsize = crypto_aead_authsize(tfm);
455         unsigned int cryptlen = req->cryptlen;
456 
457         crypto_morus1280_crypt(req, &tag, cryptlen, &ops);
458         crypto_morus1280_store(tag_out.bytes, &tag);
459 
460         scatterwalk_map_and_copy(tag_out.bytes, req->dst,
461                                  req->assoclen + cryptlen, authsize, 1);
462         return 0;
463 }
464 
465 static int crypto_morus1280_decrypt(struct aead_request *req)
466 {
467         static const struct morus1280_ops ops = {
468                 .skcipher_walk_init = skcipher_walk_aead_decrypt,
469                 .crypt_chunk = crypto_morus1280_decrypt_chunk,
470         };
471         static const u8 zeros[MORUS1280_BLOCK_SIZE] = {};
472 
473         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
474         union morus1280_block_in tag_in;
475         struct morus1280_block tag;
476         unsigned int authsize = crypto_aead_authsize(tfm);
477         unsigned int cryptlen = req->cryptlen - authsize;
478 
479         scatterwalk_map_and_copy(tag_in.bytes, req->src,
480                                  req->assoclen + cryptlen, authsize, 0);
481 
482         crypto_morus1280_load(&tag, tag_in.bytes);
483         crypto_morus1280_crypt(req, &tag, cryptlen, &ops);
484         crypto_morus1280_store(tag_in.bytes, &tag);
485 
486         return crypto_memneq(tag_in.bytes, zeros, authsize) ? -EBADMSG : 0;
487 }
488 
489 static int crypto_morus1280_init_tfm(struct crypto_aead *tfm)
490 {
491         return 0;
492 }
493 
494 static void crypto_morus1280_exit_tfm(struct crypto_aead *tfm)
495 {
496 }
497 
498 static struct aead_alg crypto_morus1280_alg = {
499         .setkey = crypto_morus1280_setkey,
500         .setauthsize = crypto_morus1280_setauthsize,
501         .encrypt = crypto_morus1280_encrypt,
502         .decrypt = crypto_morus1280_decrypt,
503         .init = crypto_morus1280_init_tfm,
504         .exit = crypto_morus1280_exit_tfm,
505 
506         .ivsize = MORUS_NONCE_SIZE,
507         .maxauthsize = MORUS_MAX_AUTH_SIZE,
508         .chunksize = MORUS1280_BLOCK_SIZE,
509 
510         .base = {
511                 .cra_blocksize = 1,
512                 .cra_ctxsize = sizeof(struct morus1280_ctx),
513                 .cra_alignmask = 0,
514 
515                 .cra_priority = 100,
516 
517                 .cra_name = "morus1280",
518                 .cra_driver_name = "morus1280-generic",
519 
520                 .cra_module = THIS_MODULE,
521         }
522 };
523 
524 
525 static int __init crypto_morus1280_module_init(void)
526 {
527         return crypto_register_aead(&crypto_morus1280_alg);
528 }
529 
530 static void __exit crypto_morus1280_module_exit(void)
531 {
532         crypto_unregister_aead(&crypto_morus1280_alg);
533 }
534 
535 module_init(crypto_morus1280_module_init);
536 module_exit(crypto_morus1280_module_exit);
537 
538 MODULE_LICENSE("GPL");
539 MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>");
540 MODULE_DESCRIPTION("MORUS-1280 AEAD algorithm");
541 MODULE_ALIAS_CRYPTO("morus1280");
542 MODULE_ALIAS_CRYPTO("morus1280-generic");
543 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp