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authorOndrej Mosnacek <omosnacek@gmail.com>2018-05-11 08:19:09 -0400
committerHerbert Xu <herbert@gondor.apana.org.au>2018-05-18 12:15:00 -0400
commit396be41f16fd05af6c914eeb2c96e0cc2dadf28c (patch)
treeda3d6b025a6e09b2d8e8c3142d8d88f4d9182fc6
parent1d373d4e8e15b358f08de52956b32e0e38a11f84 (diff)
crypto: morus - Add generic MORUS AEAD implementations
This patch adds the generic implementation of the MORUS family of AEAD algorithms (MORUS-640 and MORUS-1280). The original authors of MORUS are Hongjun Wu and Tao Huang. At the time of writing, MORUS is one of the finalists in CAESAR, an open competition intended to select a portfolio of alternatives to the problematic AES-GCM: https://competitions.cr.yp.to/caesar-submissions.html https://competitions.cr.yp.to/round3/morusv2.pdf Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat
-rw-r--r--crypto/Kconfig12
-rw-r--r--crypto/Makefile2
-rw-r--r--crypto/morus1280.c549
-rw-r--r--crypto/morus640.c544
-rw-r--r--include/crypto/morus_common.h23
5 files changed, 1130 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index d8d123ea47c6..7c53547f41a1 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -334,6 +334,18 @@ config CRYPTO_AEGIS256_AESNI_SSE2
334 help 334 help
335 AESNI+SSE2 implementation of the AEGSI-256 dedicated AEAD algorithm. 335 AESNI+SSE2 implementation of the AEGSI-256 dedicated AEAD algorithm.
336 336
337config CRYPTO_MORUS640
338 tristate "MORUS-640 AEAD algorithm"
339 select CRYPTO_AEAD
340 help
341 Support for the MORUS-640 dedicated AEAD algorithm.
342
343config CRYPTO_MORUS1280
344 tristate "MORUS-1280 AEAD algorithm"
345 select CRYPTO_AEAD
346 help
347 Support for the MORUS-1280 dedicated AEAD algorithm.
348
337config CRYPTO_SEQIV 349config CRYPTO_SEQIV
338 tristate "Sequence Number IV Generator" 350 tristate "Sequence Number IV Generator"
339 select CRYPTO_AEAD 351 select CRYPTO_AEAD
diff --git a/crypto/Makefile b/crypto/Makefile
index f2008d493a28..6d1d40eeb964 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -89,6 +89,8 @@ obj-$(CONFIG_CRYPTO_CHACHA20POLY1305) += chacha20poly1305.o
89obj-$(CONFIG_CRYPTO_AEGIS128) += aegis128.o 89obj-$(CONFIG_CRYPTO_AEGIS128) += aegis128.o
90obj-$(CONFIG_CRYPTO_AEGIS128L) += aegis128l.o 90obj-$(CONFIG_CRYPTO_AEGIS128L) += aegis128l.o
91obj-$(CONFIG_CRYPTO_AEGIS256) += aegis256.o 91obj-$(CONFIG_CRYPTO_AEGIS256) += aegis256.o
92obj-$(CONFIG_CRYPTO_MORUS640) += morus640.o
93obj-$(CONFIG_CRYPTO_MORUS1280) += morus1280.o
92obj-$(CONFIG_CRYPTO_PCRYPT) += pcrypt.o 94obj-$(CONFIG_CRYPTO_PCRYPT) += pcrypt.o
93obj-$(CONFIG_CRYPTO_CRYPTD) += cryptd.o 95obj-$(CONFIG_CRYPTO_CRYPTD) += cryptd.o
94obj-$(CONFIG_CRYPTO_MCRYPTD) += mcryptd.o 96obj-$(CONFIG_CRYPTO_MCRYPTD) += mcryptd.o
diff --git a/crypto/morus1280.c b/crypto/morus1280.c
new file mode 100644
index 000000000000..6180b2557836
--- /dev/null
+++ b/crypto/morus1280.c
@@ -0,0 +1,549 @@
1/*
2 * The MORUS-1280 Authenticated-Encryption Algorithm
3 *
4 * Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
5 * Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
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#include <asm/unaligned.h>
14#include <crypto/algapi.h>
15#include <crypto/internal/aead.h>
16#include <crypto/internal/skcipher.h>
17#include <crypto/morus_common.h>
18#include <crypto/scatterwalk.h>
19#include <linux/err.h>
20#include <linux/init.h>
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/scatterlist.h>
24
25#define MORUS1280_WORD_SIZE 8
26#define MORUS1280_BLOCK_SIZE (MORUS_BLOCK_WORDS * MORUS1280_WORD_SIZE)
27#define MORUS1280_BLOCK_ALIGN (__alignof__(__le64))
28#define MORUS1280_ALIGNED(p) IS_ALIGNED((uintptr_t)p, MORUS1280_BLOCK_ALIGN)
29
30struct morus1280_block {
31 u64 words[MORUS_BLOCK_WORDS];
32};
33
34union morus1280_block_in {
35 __le64 words[MORUS_BLOCK_WORDS];
36 u8 bytes[MORUS1280_BLOCK_SIZE];
37};
38
39struct morus1280_state {
40 struct morus1280_block s[MORUS_STATE_BLOCKS];
41};
42
43struct morus1280_ctx {
44 struct morus1280_block key;
45};
46
47struct morus1280_ops {
48 int (*skcipher_walk_init)(struct skcipher_walk *walk,
49 struct aead_request *req, bool atomic);
50
51 void (*crypt_chunk)(struct morus1280_state *state,
52 u8 *dst, const u8 *src, unsigned int size);
53};
54
55static const struct morus1280_block crypto_morus1280_const[1] = {
56 { .words = {
57 U64_C(0x0d08050302010100),
58 U64_C(0x6279e99059372215),
59 U64_C(0xf12fc26d55183ddb),
60 U64_C(0xdd28b57342311120),
61 } },
62};
63
64static void crypto_morus1280_round(struct morus1280_block *b0,
65 struct morus1280_block *b1,
66 struct morus1280_block *b2,
67 struct morus1280_block *b3,
68 struct morus1280_block *b4,
69 const struct morus1280_block *m,
70 unsigned int b, unsigned int w)
71{
72 unsigned int i;
73 struct morus1280_block tmp;
74
75 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
76 b0->words[i] ^= b1->words[i] & b2->words[i];
77 b0->words[i] ^= b3->words[i];
78 b0->words[i] ^= m->words[i];
79 b0->words[i] = rol64(b0->words[i], b);
80 }
81
82 tmp = *b3;
83 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
84 b3->words[(i + w) % MORUS_BLOCK_WORDS] = tmp.words[i];
85}
86
87static void crypto_morus1280_update(struct morus1280_state *state,
88 const struct morus1280_block *m)
89{
90 static const struct morus1280_block z = {};
91
92 struct morus1280_block *s = state->s;
93
94 crypto_morus1280_round(&s[0], &s[1], &s[2], &s[3], &s[4], &z, 13, 1);
95 crypto_morus1280_round(&s[1], &s[2], &s[3], &s[4], &s[0], m, 46, 2);
96 crypto_morus1280_round(&s[2], &s[3], &s[4], &s[0], &s[1], m, 38, 3);
97 crypto_morus1280_round(&s[3], &s[4], &s[0], &s[1], &s[2], m, 7, 2);
98 crypto_morus1280_round(&s[4], &s[0], &s[1], &s[2], &s[3], m, 4, 1);
99}
100
101static void crypto_morus1280_load_a(struct morus1280_block *dst, const u8 *src)
102{
103 unsigned int i;
104 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
105 dst->words[i] = le64_to_cpu(*(const __le64 *)src);
106 src += MORUS1280_WORD_SIZE;
107 }
108}
109
110static void crypto_morus1280_load_u(struct morus1280_block *dst, const u8 *src)
111{
112 unsigned int i;
113 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
114 dst->words[i] = get_unaligned_le64(src);
115 src += MORUS1280_WORD_SIZE;
116 }
117}
118
119static void crypto_morus1280_load(struct morus1280_block *dst, const u8 *src)
120{
121 if (MORUS1280_ALIGNED(src))
122 crypto_morus1280_load_a(dst, src);
123 else
124 crypto_morus1280_load_u(dst, src);
125}
126
127static void crypto_morus1280_store_a(u8 *dst, const struct morus1280_block *src)
128{
129 unsigned int i;
130 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
131 *(__le64 *)dst = cpu_to_le64(src->words[i]);
132 dst += MORUS1280_WORD_SIZE;
133 }
134}
135
136static void crypto_morus1280_store_u(u8 *dst, const struct morus1280_block *src)
137{
138 unsigned int i;
139 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
140 put_unaligned_le64(src->words[i], dst);
141 dst += MORUS1280_WORD_SIZE;
142 }
143}
144
145static void crypto_morus1280_store(u8 *dst, const struct morus1280_block *src)
146{
147 if (MORUS1280_ALIGNED(dst))
148 crypto_morus1280_store_a(dst, src);
149 else
150 crypto_morus1280_store_u(dst, src);
151}
152
153static void crypto_morus1280_ad(struct morus1280_state *state, const u8 *src,
154 unsigned int size)
155{
156 struct morus1280_block m;
157
158 if (MORUS1280_ALIGNED(src)) {
159 while (size >= MORUS1280_BLOCK_SIZE) {
160 crypto_morus1280_load_a(&m, src);
161 crypto_morus1280_update(state, &m);
162
163 size -= MORUS1280_BLOCK_SIZE;
164 src += MORUS1280_BLOCK_SIZE;
165 }
166 } else {
167 while (size >= MORUS1280_BLOCK_SIZE) {
168 crypto_morus1280_load_u(&m, src);
169 crypto_morus1280_update(state, &m);
170
171 size -= MORUS1280_BLOCK_SIZE;
172 src += MORUS1280_BLOCK_SIZE;
173 }
174 }
175}
176
177static void crypto_morus1280_core(const struct morus1280_state *state,
178 struct morus1280_block *blk)
179{
180 unsigned int i;
181
182 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
183 blk->words[(i + 3) % MORUS_BLOCK_WORDS] ^= state->s[1].words[i];
184
185 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
186 blk->words[i] ^= state->s[0].words[i];
187 blk->words[i] ^= state->s[2].words[i] & state->s[3].words[i];
188 }
189}
190
191static void crypto_morus1280_encrypt_chunk(struct morus1280_state *state,
192 u8 *dst, const u8 *src,
193 unsigned int size)
194{
195 struct morus1280_block c, m;
196
197 if (MORUS1280_ALIGNED(src) && MORUS1280_ALIGNED(dst)) {
198 while (size >= MORUS1280_BLOCK_SIZE) {
199 crypto_morus1280_load_a(&m, src);
200 c = m;
201 crypto_morus1280_core(state, &c);
202 crypto_morus1280_store_a(dst, &c);
203 crypto_morus1280_update(state, &m);
204
205 src += MORUS1280_BLOCK_SIZE;
206 dst += MORUS1280_BLOCK_SIZE;
207 size -= MORUS1280_BLOCK_SIZE;
208 }
209 } else {
210 while (size >= MORUS1280_BLOCK_SIZE) {
211 crypto_morus1280_load_u(&m, src);
212 c = m;
213 crypto_morus1280_core(state, &c);
214 crypto_morus1280_store_u(dst, &c);
215 crypto_morus1280_update(state, &m);
216
217 src += MORUS1280_BLOCK_SIZE;
218 dst += MORUS1280_BLOCK_SIZE;
219 size -= MORUS1280_BLOCK_SIZE;
220 }
221 }
222
223 if (size > 0) {
224 union morus1280_block_in tail;
225
226 memcpy(tail.bytes, src, size);
227 memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
228
229 crypto_morus1280_load_a(&m, tail.bytes);
230 c = m;
231 crypto_morus1280_core(state, &c);
232 crypto_morus1280_store_a(tail.bytes, &c);
233 crypto_morus1280_update(state, &m);
234
235 memcpy(dst, tail.bytes, size);
236 }
237}
238
239static void crypto_morus1280_decrypt_chunk(struct morus1280_state *state,
240 u8 *dst, const u8 *src,
241 unsigned int size)
242{
243 struct morus1280_block m;
244
245 if (MORUS1280_ALIGNED(src) && MORUS1280_ALIGNED(dst)) {
246 while (size >= MORUS1280_BLOCK_SIZE) {
247 crypto_morus1280_load_a(&m, src);
248 crypto_morus1280_core(state, &m);
249 crypto_morus1280_store_a(dst, &m);
250 crypto_morus1280_update(state, &m);
251
252 src += MORUS1280_BLOCK_SIZE;
253 dst += MORUS1280_BLOCK_SIZE;
254 size -= MORUS1280_BLOCK_SIZE;
255 }
256 } else {
257 while (size >= MORUS1280_BLOCK_SIZE) {
258 crypto_morus1280_load_u(&m, src);
259 crypto_morus1280_core(state, &m);
260 crypto_morus1280_store_u(dst, &m);
261 crypto_morus1280_update(state, &m);
262
263 src += MORUS1280_BLOCK_SIZE;
264 dst += MORUS1280_BLOCK_SIZE;
265 size -= MORUS1280_BLOCK_SIZE;
266 }
267 }
268
269 if (size > 0) {
270 union morus1280_block_in tail;
271
272 memcpy(tail.bytes, src, size);
273 memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
274
275 crypto_morus1280_load_a(&m, tail.bytes);
276 crypto_morus1280_core(state, &m);
277 crypto_morus1280_store_a(tail.bytes, &m);
278 memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
279 crypto_morus1280_load_a(&m, tail.bytes);
280 crypto_morus1280_update(state, &m);
281
282 memcpy(dst, tail.bytes, size);
283 }
284}
285
286static void crypto_morus1280_init(struct morus1280_state *state,
287 const struct morus1280_block *key,
288 const u8 *iv)
289{
290 static const struct morus1280_block z = {};
291
292 union morus1280_block_in tmp;
293 unsigned int i;
294
295 memcpy(tmp.bytes, iv, MORUS_NONCE_SIZE);
296 memset(tmp.bytes + MORUS_NONCE_SIZE, 0,
297 MORUS1280_BLOCK_SIZE - MORUS_NONCE_SIZE);
298
299 crypto_morus1280_load(&state->s[0], tmp.bytes);
300 state->s[1] = *key;
301 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
302 state->s[2].words[i] = U64_C(0xFFFFFFFFFFFFFFFF);
303 state->s[3] = z;
304 state->s[4] = crypto_morus1280_const[0];
305
306 for (i = 0; i < 16; i++)
307 crypto_morus1280_update(state, &z);
308
309 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
310 state->s[1].words[i] ^= key->words[i];
311}
312
313static void crypto_morus1280_process_ad(struct morus1280_state *state,
314 struct scatterlist *sg_src,
315 unsigned int assoclen)
316{
317 struct scatter_walk walk;
318 struct morus1280_block m;
319 union morus1280_block_in buf;
320 unsigned int pos = 0;
321
322 scatterwalk_start(&walk, sg_src);
323 while (assoclen != 0) {
324 unsigned int size = scatterwalk_clamp(&walk, assoclen);
325 unsigned int left = size;
326 void *mapped = scatterwalk_map(&walk);
327 const u8 *src = (const u8 *)mapped;
328
329 if (pos + size >= MORUS1280_BLOCK_SIZE) {
330 if (pos > 0) {
331 unsigned int fill = MORUS1280_BLOCK_SIZE - pos;
332 memcpy(buf.bytes + pos, src, fill);
333
334 crypto_morus1280_load_a(&m, buf.bytes);
335 crypto_morus1280_update(state, &m);
336
337 pos = 0;
338 left -= fill;
339 src += fill;
340 }
341
342 crypto_morus1280_ad(state, src, left);
343 src += left & ~(MORUS1280_BLOCK_SIZE - 1);
344 left &= MORUS1280_BLOCK_SIZE - 1;
345 }
346
347 memcpy(buf.bytes + pos, src, left);
348
349 pos += left;
350 assoclen -= size;
351 scatterwalk_unmap(mapped);
352 scatterwalk_advance(&walk, size);
353 scatterwalk_done(&walk, 0, assoclen);
354 }
355
356 if (pos > 0) {
357 memset(buf.bytes + pos, 0, MORUS1280_BLOCK_SIZE - pos);
358
359 crypto_morus1280_load_a(&m, buf.bytes);
360 crypto_morus1280_update(state, &m);
361 }
362}
363
364static void crypto_morus1280_process_crypt(struct morus1280_state *state,
365 struct aead_request *req,
366 const struct morus1280_ops *ops)
367{
368 struct skcipher_walk walk;
369 u8 *dst;
370 const u8 *src;
371
372 ops->skcipher_walk_init(&walk, req, false);
373
374 while (walk.nbytes) {
375 src = walk.src.virt.addr;
376 dst = walk.dst.virt.addr;
377
378 ops->crypt_chunk(state, dst, src, walk.nbytes);
379
380 skcipher_walk_done(&walk, 0);
381 }
382}
383
384static void crypto_morus1280_final(struct morus1280_state *state,
385 struct morus1280_block *tag_xor,
386 u64 assoclen, u64 cryptlen)
387{
388 u64 assocbits = assoclen * 8;
389 u64 cryptbits = cryptlen * 8;
390
391 struct morus1280_block tmp;
392 unsigned int i;
393
394 tmp.words[0] = cpu_to_le64(assocbits);
395 tmp.words[1] = cpu_to_le64(cryptbits);
396 tmp.words[2] = 0;
397 tmp.words[3] = 0;
398
399 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
400 state->s[4].words[i] ^= state->s[0].words[i];
401
402 for (i = 0; i < 10; i++)
403 crypto_morus1280_update(state, &tmp);
404
405 crypto_morus1280_core(state, tag_xor);
406}
407
408static int crypto_morus1280_setkey(struct crypto_aead *aead, const u8 *key,
409 unsigned int keylen)
410{
411 struct morus1280_ctx *ctx = crypto_aead_ctx(aead);
412 union morus1280_block_in tmp;
413
414 if (keylen == MORUS1280_BLOCK_SIZE)
415 crypto_morus1280_load(&ctx->key, key);
416 else if (keylen == MORUS1280_BLOCK_SIZE / 2) {
417 memcpy(tmp.bytes, key, keylen);
418 memcpy(tmp.bytes + keylen, key, keylen);
419
420 crypto_morus1280_load(&ctx->key, tmp.bytes);
421 } else {
422 crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
423 return -EINVAL;
424 }
425
426 return 0;
427}
428
429static int crypto_morus1280_setauthsize(struct crypto_aead *tfm,
430 unsigned int authsize)
431{
432 return (authsize <= MORUS_MAX_AUTH_SIZE) ? 0 : -EINVAL;
433}
434
435static void crypto_morus1280_crypt(struct aead_request *req,
436 struct morus1280_block *tag_xor,
437 unsigned int cryptlen,
438 const struct morus1280_ops *ops)
439{
440 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
441 struct morus1280_ctx *ctx = crypto_aead_ctx(tfm);
442 struct morus1280_state state;
443
444 crypto_morus1280_init(&state, &ctx->key, req->iv);
445 crypto_morus1280_process_ad(&state, req->src, req->assoclen);
446 crypto_morus1280_process_crypt(&state, req, ops);
447 crypto_morus1280_final(&state, tag_xor, req->assoclen, cryptlen);
448}
449
450static int crypto_morus1280_encrypt(struct aead_request *req)
451{
452 static const struct morus1280_ops ops = {
453 .skcipher_walk_init = skcipher_walk_aead_encrypt,
454 .crypt_chunk = crypto_morus1280_encrypt_chunk,
455 };
456
457 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
458 struct morus1280_block tag = {};
459 union morus1280_block_in tag_out;
460 unsigned int authsize = crypto_aead_authsize(tfm);
461 unsigned int cryptlen = req->cryptlen;
462
463 crypto_morus1280_crypt(req, &tag, cryptlen, &ops);
464 crypto_morus1280_store(tag_out.bytes, &tag);
465
466 scatterwalk_map_and_copy(tag_out.bytes, req->dst,
467 req->assoclen + cryptlen, authsize, 1);
468 return 0;
469}
470
471static int crypto_morus1280_decrypt(struct aead_request *req)
472{
473 static const struct morus1280_ops ops = {
474 .skcipher_walk_init = skcipher_walk_aead_decrypt,
475 .crypt_chunk = crypto_morus1280_decrypt_chunk,
476 };
477 static const u8 zeros[MORUS1280_BLOCK_SIZE] = {};
478
479 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
480 union morus1280_block_in tag_in;
481 struct morus1280_block tag;
482 unsigned int authsize = crypto_aead_authsize(tfm);
483 unsigned int cryptlen = req->cryptlen - authsize;
484
485 scatterwalk_map_and_copy(tag_in.bytes, req->src,
486 req->assoclen + cryptlen, authsize, 0);
487
488 crypto_morus1280_load(&tag, tag_in.bytes);
489 crypto_morus1280_crypt(req, &tag, cryptlen, &ops);
490 crypto_morus1280_store(tag_in.bytes, &tag);
491
492 return crypto_memneq(tag_in.bytes, zeros, authsize) ? -EBADMSG : 0;
493}
494
495static int crypto_morus1280_init_tfm(struct crypto_aead *tfm)
496{
497 return 0;
498}
499
500static void crypto_morus1280_exit_tfm(struct crypto_aead *tfm)
501{
502}
503
504static struct aead_alg crypto_morus1280_alg = {
505 .setkey = crypto_morus1280_setkey,
506 .setauthsize = crypto_morus1280_setauthsize,
507 .encrypt = crypto_morus1280_encrypt,
508 .decrypt = crypto_morus1280_decrypt,
509 .init = crypto_morus1280_init_tfm,
510 .exit = crypto_morus1280_exit_tfm,
511
512 .ivsize = MORUS_NONCE_SIZE,
513 .maxauthsize = MORUS_MAX_AUTH_SIZE,
514 .chunksize = MORUS1280_BLOCK_SIZE,
515
516 .base = {
517 .cra_flags = CRYPTO_ALG_TYPE_AEAD,
518 .cra_blocksize = 1,
519 .cra_ctxsize = sizeof(struct morus1280_ctx),
520 .cra_alignmask = 0,
521
522 .cra_priority = 100,
523
524 .cra_name = "morus1280",
525 .cra_driver_name = "morus1280-generic",
526
527 .cra_module = THIS_MODULE,
528 }
529};
530
531
532static int __init crypto_morus1280_module_init(void)
533{
534 return crypto_register_aead(&crypto_morus1280_alg);
535}
536
537static void __exit crypto_morus1280_module_exit(void)
538{
539 crypto_unregister_aead(&crypto_morus1280_alg);
540}
541
542module_init(crypto_morus1280_module_init);
543module_exit(crypto_morus1280_module_exit);
544
545MODULE_LICENSE("GPL");
546MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>");
547MODULE_DESCRIPTION("MORUS-1280 AEAD algorithm");
548MODULE_ALIAS_CRYPTO("morus1280");
549MODULE_ALIAS_CRYPTO("morus1280-generic");
diff --git a/crypto/morus640.c b/crypto/morus640.c
new file mode 100644
index 000000000000..9fbcde307daf
--- /dev/null
+++ b/crypto/morus640.c
@@ -0,0 +1,544 @@
1/*
2 * The MORUS-640 Authenticated-Encryption Algorithm
3 *
4 * Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
5 * Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
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#include <asm/unaligned.h>
14#include <crypto/algapi.h>
15#include <crypto/internal/aead.h>
16#include <crypto/internal/skcipher.h>
17#include <crypto/morus_common.h>
18#include <crypto/scatterwalk.h>
19#include <linux/err.h>
20#include <linux/init.h>
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/scatterlist.h>
24
25#define MORUS640_WORD_SIZE 4
26#define MORUS640_BLOCK_SIZE (MORUS_BLOCK_WORDS * MORUS640_WORD_SIZE)
27#define MORUS640_BLOCK_ALIGN (__alignof__(__le32))
28#define MORUS640_ALIGNED(p) IS_ALIGNED((uintptr_t)p, MORUS640_BLOCK_ALIGN)
29
30struct morus640_block {
31 u32 words[MORUS_BLOCK_WORDS];
32};
33
34union morus640_block_in {
35 __le32 words[MORUS_BLOCK_WORDS];
36 u8 bytes[MORUS640_BLOCK_SIZE];
37};
38
39struct morus640_state {
40 struct morus640_block s[MORUS_STATE_BLOCKS];
41};
42
43struct morus640_ctx {
44 struct morus640_block key;
45};
46
47struct morus640_ops {
48 int (*skcipher_walk_init)(struct skcipher_walk *walk,
49 struct aead_request *req, bool atomic);
50
51 void (*crypt_chunk)(struct morus640_state *state,
52 u8 *dst, const u8 *src, unsigned int size);
53};
54
55static const struct morus640_block crypto_morus640_const[2] = {
56 { .words = {
57 U32_C(0x02010100),
58 U32_C(0x0d080503),
59 U32_C(0x59372215),
60 U32_C(0x6279e990),
61 } },
62 { .words = {
63 U32_C(0x55183ddb),
64 U32_C(0xf12fc26d),
65 U32_C(0x42311120),
66 U32_C(0xdd28b573),
67 } },
68};
69
70static void crypto_morus640_round(struct morus640_block *b0,
71 struct morus640_block *b1,
72 struct morus640_block *b2,
73 struct morus640_block *b3,
74 struct morus640_block *b4,
75 const struct morus640_block *m,
76 unsigned int b, unsigned int w)
77{
78 unsigned int i;
79 struct morus640_block tmp;
80
81 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
82 b0->words[i] ^= b1->words[i] & b2->words[i];
83 b0->words[i] ^= b3->words[i];
84 b0->words[i] ^= m->words[i];
85 b0->words[i] = rol32(b0->words[i], b);
86 }
87
88 tmp = *b3;
89 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
90 b3->words[(i + w) % MORUS_BLOCK_WORDS] = tmp.words[i];
91}
92
93static void crypto_morus640_update(struct morus640_state *state,
94 const struct morus640_block *m)
95{
96 static const struct morus640_block z = {};
97
98 struct morus640_block *s = state->s;
99
100 crypto_morus640_round(&s[0], &s[1], &s[2], &s[3], &s[4], &z, 5, 1);
101 crypto_morus640_round(&s[1], &s[2], &s[3], &s[4], &s[0], m, 31, 2);
102 crypto_morus640_round(&s[2], &s[3], &s[4], &s[0], &s[1], m, 7, 3);
103 crypto_morus640_round(&s[3], &s[4], &s[0], &s[1], &s[2], m, 22, 2);
104 crypto_morus640_round(&s[4], &s[0], &s[1], &s[2], &s[3], m, 13, 1);
105}
106
107static void crypto_morus640_load_a(struct morus640_block *dst, const u8 *src)
108{
109 unsigned int i;
110 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
111 dst->words[i] = le32_to_cpu(*(const __le32 *)src);
112 src += MORUS640_WORD_SIZE;
113 }
114}
115
116static void crypto_morus640_load_u(struct morus640_block *dst, const u8 *src)
117{
118 unsigned int i;
119 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
120 dst->words[i] = get_unaligned_le32(src);
121 src += MORUS640_WORD_SIZE;
122 }
123}
124
125static void crypto_morus640_load(struct morus640_block *dst, const u8 *src)
126{
127 if (MORUS640_ALIGNED(src))
128 crypto_morus640_load_a(dst, src);
129 else
130 crypto_morus640_load_u(dst, src);
131}
132
133static void crypto_morus640_store_a(u8 *dst, const struct morus640_block *src)
134{
135 unsigned int i;
136 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
137 *(__le32 *)dst = cpu_to_le32(src->words[i]);
138 dst += MORUS640_WORD_SIZE;
139 }
140}
141
142static void crypto_morus640_store_u(u8 *dst, const struct morus640_block *src)
143{
144 unsigned int i;
145 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
146 put_unaligned_le32(src->words[i], dst);
147 dst += MORUS640_WORD_SIZE;
148 }
149}
150
151static void crypto_morus640_store(u8 *dst, const struct morus640_block *src)
152{
153 if (MORUS640_ALIGNED(dst))
154 crypto_morus640_store_a(dst, src);
155 else
156 crypto_morus640_store_u(dst, src);
157}
158
159static void crypto_morus640_ad(struct morus640_state *state, const u8 *src,
160 unsigned int size)
161{
162 struct morus640_block m;
163
164 if (MORUS640_ALIGNED(src)) {
165 while (size >= MORUS640_BLOCK_SIZE) {
166 crypto_morus640_load_a(&m, src);
167 crypto_morus640_update(state, &m);
168
169 size -= MORUS640_BLOCK_SIZE;
170 src += MORUS640_BLOCK_SIZE;
171 }
172 } else {
173 while (size >= MORUS640_BLOCK_SIZE) {
174 crypto_morus640_load_u(&m, src);
175 crypto_morus640_update(state, &m);
176
177 size -= MORUS640_BLOCK_SIZE;
178 src += MORUS640_BLOCK_SIZE;
179 }
180 }
181}
182
183static void crypto_morus640_core(const struct morus640_state *state,
184 struct morus640_block *blk)
185{
186 unsigned int i;
187
188 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
189 blk->words[(i + 3) % MORUS_BLOCK_WORDS] ^= state->s[1].words[i];
190
191 for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
192 blk->words[i] ^= state->s[0].words[i];
193 blk->words[i] ^= state->s[2].words[i] & state->s[3].words[i];
194 }
195}
196
197static void crypto_morus640_encrypt_chunk(struct morus640_state *state, u8 *dst,
198 const u8 *src, unsigned int size)
199{
200 struct morus640_block c, m;
201
202 if (MORUS640_ALIGNED(src) && MORUS640_ALIGNED(dst)) {
203 while (size >= MORUS640_BLOCK_SIZE) {
204 crypto_morus640_load_a(&m, src);
205 c = m;
206 crypto_morus640_core(state, &c);
207 crypto_morus640_store_a(dst, &c);
208 crypto_morus640_update(state, &m);
209
210 src += MORUS640_BLOCK_SIZE;
211 dst += MORUS640_BLOCK_SIZE;
212 size -= MORUS640_BLOCK_SIZE;
213 }
214 } else {
215 while (size >= MORUS640_BLOCK_SIZE) {
216 crypto_morus640_load_u(&m, src);
217 c = m;
218 crypto_morus640_core(state, &c);
219 crypto_morus640_store_u(dst, &c);
220 crypto_morus640_update(state, &m);
221
222 src += MORUS640_BLOCK_SIZE;
223 dst += MORUS640_BLOCK_SIZE;
224 size -= MORUS640_BLOCK_SIZE;
225 }
226 }
227
228 if (size > 0) {
229 union morus640_block_in tail;
230
231 memcpy(tail.bytes, src, size);
232 memset(tail.bytes + size, 0, MORUS640_BLOCK_SIZE - size);
233
234 crypto_morus640_load_a(&m, tail.bytes);
235 c = m;
236 crypto_morus640_core(state, &c);
237 crypto_morus640_store_a(tail.bytes, &c);
238 crypto_morus640_update(state, &m);
239
240 memcpy(dst, tail.bytes, size);
241 }
242}
243
244static void crypto_morus640_decrypt_chunk(struct morus640_state *state, u8 *dst,
245 const u8 *src, unsigned int size)
246{
247 struct morus640_block m;
248
249 if (MORUS640_ALIGNED(src) && MORUS640_ALIGNED(dst)) {
250 while (size >= MORUS640_BLOCK_SIZE) {
251 crypto_morus640_load_a(&m, src);
252 crypto_morus640_core(state, &m);
253 crypto_morus640_store_a(dst, &m);
254 crypto_morus640_update(state, &m);
255
256 src += MORUS640_BLOCK_SIZE;
257 dst += MORUS640_BLOCK_SIZE;
258 size -= MORUS640_BLOCK_SIZE;
259 }
260 } else {
261 while (size >= MORUS640_BLOCK_SIZE) {
262 crypto_morus640_load_u(&m, src);
263 crypto_morus640_core(state, &m);
264 crypto_morus640_store_u(dst, &m);
265 crypto_morus640_update(state, &m);
266
267 src += MORUS640_BLOCK_SIZE;
268 dst += MORUS640_BLOCK_SIZE;
269 size -= MORUS640_BLOCK_SIZE;
270 }
271 }
272
273 if (size > 0) {
274 union morus640_block_in tail;
275
276 memcpy(tail.bytes, src, size);
277
278 crypto_morus640_load_a(&m, src);
279 crypto_morus640_core(state, &m);
280 crypto_morus640_store_a(tail.bytes, &m);
281 memset(tail.bytes + size, 0, MORUS640_BLOCK_SIZE - size);
282 crypto_morus640_load_a(&m, tail.bytes);
283 crypto_morus640_update(state, &m);
284
285 memcpy(dst, tail.bytes, size);
286 }
287}
288
289static void crypto_morus640_init(struct morus640_state *state,
290 const struct morus640_block *key,
291 const u8 *iv)
292{
293 static const struct morus640_block z = {};
294
295 unsigned int i;
296
297 crypto_morus640_load(&state->s[0], iv);
298 state->s[1] = *key;
299 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
300 state->s[2].words[i] = U32_C(0xFFFFFFFF);
301 state->s[3] = crypto_morus640_const[0];
302 state->s[4] = crypto_morus640_const[1];
303
304 for (i = 0; i < 16; i++)
305 crypto_morus640_update(state, &z);
306
307 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
308 state->s[1].words[i] ^= key->words[i];
309}
310
311static void crypto_morus640_process_ad(struct morus640_state *state,
312 struct scatterlist *sg_src,
313 unsigned int assoclen)
314{
315 struct scatter_walk walk;
316 struct morus640_block m;
317 union morus640_block_in buf;
318 unsigned int pos = 0;
319
320 scatterwalk_start(&walk, sg_src);
321 while (assoclen != 0) {
322 unsigned int size = scatterwalk_clamp(&walk, assoclen);
323 unsigned int left = size;
324 void *mapped = scatterwalk_map(&walk);
325 const u8 *src = (const u8 *)mapped;
326
327 if (pos + size >= MORUS640_BLOCK_SIZE) {
328 if (pos > 0) {
329 unsigned int fill = MORUS640_BLOCK_SIZE - pos;
330 memcpy(buf.bytes + pos, src, fill);
331
332 crypto_morus640_load_a(&m, buf.bytes);
333 crypto_morus640_update(state, &m);
334
335 pos = 0;
336 left -= fill;
337 src += fill;
338 }
339
340 crypto_morus640_ad(state, src, left);
341 src += left & ~(MORUS640_BLOCK_SIZE - 1);
342 left &= MORUS640_BLOCK_SIZE - 1;
343 }
344
345 memcpy(buf.bytes + pos, src, left);
346
347 pos += left;
348 assoclen -= size;
349 scatterwalk_unmap(mapped);
350 scatterwalk_advance(&walk, size);
351 scatterwalk_done(&walk, 0, assoclen);
352 }
353
354 if (pos > 0) {
355 memset(buf.bytes + pos, 0, MORUS640_BLOCK_SIZE - pos);
356
357 crypto_morus640_load_a(&m, buf.bytes);
358 crypto_morus640_update(state, &m);
359 }
360}
361
362static void crypto_morus640_process_crypt(struct morus640_state *state,
363 struct aead_request *req,
364 const struct morus640_ops *ops)
365{
366 struct skcipher_walk walk;
367 u8 *dst;
368 const u8 *src;
369
370 ops->skcipher_walk_init(&walk, req, false);
371
372 while (walk.nbytes) {
373 src = walk.src.virt.addr;
374 dst = walk.dst.virt.addr;
375
376 ops->crypt_chunk(state, dst, src, walk.nbytes);
377
378 skcipher_walk_done(&walk, 0);
379 }
380}
381
382static void crypto_morus640_final(struct morus640_state *state,
383 struct morus640_block *tag_xor,
384 u64 assoclen, u64 cryptlen)
385{
386 u64 assocbits = assoclen * 8;
387 u64 cryptbits = cryptlen * 8;
388
389 u32 assocbits_lo = (u32)assocbits;
390 u32 assocbits_hi = (u32)(assocbits >> 32);
391 u32 cryptbits_lo = (u32)cryptbits;
392 u32 cryptbits_hi = (u32)(cryptbits >> 32);
393
394 struct morus640_block tmp;
395 unsigned int i;
396
397 tmp.words[0] = cpu_to_le32(assocbits_lo);
398 tmp.words[1] = cpu_to_le32(assocbits_hi);
399 tmp.words[2] = cpu_to_le32(cryptbits_lo);
400 tmp.words[3] = cpu_to_le32(cryptbits_hi);
401
402 for (i = 0; i < MORUS_BLOCK_WORDS; i++)
403 state->s[4].words[i] ^= state->s[0].words[i];
404
405 for (i = 0; i < 10; i++)
406 crypto_morus640_update(state, &tmp);
407
408 crypto_morus640_core(state, tag_xor);
409}
410
411static int crypto_morus640_setkey(struct crypto_aead *aead, const u8 *key,
412 unsigned int keylen)
413{
414 struct morus640_ctx *ctx = crypto_aead_ctx(aead);
415
416 if (keylen != MORUS640_BLOCK_SIZE) {
417 crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
418 return -EINVAL;
419 }
420
421 crypto_morus640_load(&ctx->key, key);
422 return 0;
423}
424
425static int crypto_morus640_setauthsize(struct crypto_aead *tfm,
426 unsigned int authsize)
427{
428 return (authsize <= MORUS_MAX_AUTH_SIZE) ? 0 : -EINVAL;
429}
430
431static void crypto_morus640_crypt(struct aead_request *req,
432 struct morus640_block *tag_xor,
433 unsigned int cryptlen,
434 const struct morus640_ops *ops)
435{
436 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
437 struct morus640_ctx *ctx = crypto_aead_ctx(tfm);
438 struct morus640_state state;
439
440 crypto_morus640_init(&state, &ctx->key, req->iv);
441 crypto_morus640_process_ad(&state, req->src, req->assoclen);
442 crypto_morus640_process_crypt(&state, req, ops);
443 crypto_morus640_final(&state, tag_xor, req->assoclen, cryptlen);
444}
445
446static int crypto_morus640_encrypt(struct aead_request *req)
447{
448 static const struct morus640_ops ops = {
449 .skcipher_walk_init = skcipher_walk_aead_encrypt,
450 .crypt_chunk = crypto_morus640_encrypt_chunk,
451 };
452
453 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
454 struct morus640_block tag = {};
455 union morus640_block_in tag_out;
456 unsigned int authsize = crypto_aead_authsize(tfm);
457 unsigned int cryptlen = req->cryptlen;
458
459 crypto_morus640_crypt(req, &tag, cryptlen, &ops);
460 crypto_morus640_store(tag_out.bytes, &tag);
461
462 scatterwalk_map_and_copy(tag_out.bytes, req->dst,
463 req->assoclen + cryptlen, authsize, 1);
464 return 0;
465}
466
467static int crypto_morus640_decrypt(struct aead_request *req)
468{
469 static const struct morus640_ops ops = {
470 .skcipher_walk_init = skcipher_walk_aead_decrypt,
471 .crypt_chunk = crypto_morus640_decrypt_chunk,
472 };
473 static const u8 zeros[MORUS640_BLOCK_SIZE] = {};
474
475 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
476 union morus640_block_in tag_in;
477 struct morus640_block tag;
478 unsigned int authsize = crypto_aead_authsize(tfm);
479 unsigned int cryptlen = req->cryptlen - authsize;
480
481 scatterwalk_map_and_copy(tag_in.bytes, req->src,
482 req->assoclen + cryptlen, authsize, 0);
483
484 crypto_morus640_load(&tag, tag_in.bytes);
485 crypto_morus640_crypt(req, &tag, cryptlen, &ops);
486 crypto_morus640_store(tag_in.bytes, &tag);
487
488 return crypto_memneq(tag_in.bytes, zeros, authsize) ? -EBADMSG : 0;
489}
490
491static int crypto_morus640_init_tfm(struct crypto_aead *tfm)
492{
493 return 0;
494}
495
496static void crypto_morus640_exit_tfm(struct crypto_aead *tfm)
497{
498}
499
500static struct aead_alg crypto_morus640_alg = {
501 .setkey = crypto_morus640_setkey,
502 .setauthsize = crypto_morus640_setauthsize,
503 .encrypt = crypto_morus640_encrypt,
504 .decrypt = crypto_morus640_decrypt,
505 .init = crypto_morus640_init_tfm,
506 .exit = crypto_morus640_exit_tfm,
507
508 .ivsize = MORUS_NONCE_SIZE,
509 .maxauthsize = MORUS_MAX_AUTH_SIZE,
510 .chunksize = MORUS640_BLOCK_SIZE,
511
512 .base = {
513 .cra_flags = CRYPTO_ALG_TYPE_AEAD,
514 .cra_blocksize = 1,
515 .cra_ctxsize = sizeof(struct morus640_ctx),
516 .cra_alignmask = 0,
517
518 .cra_priority = 100,
519
520 .cra_name = "morus640",
521 .cra_driver_name = "morus640-generic",
522
523 .cra_module = THIS_MODULE,
524 }
525};
526
527static int __init crypto_morus640_module_init(void)
528{
529 return crypto_register_aead(&crypto_morus640_alg);
530}
531
532static void __exit crypto_morus640_module_exit(void)
533{
534 crypto_unregister_aead(&crypto_morus640_alg);
535}
536
537module_init(crypto_morus640_module_init);
538module_exit(crypto_morus640_module_exit);
539
540MODULE_LICENSE("GPL");
541MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>");
542MODULE_DESCRIPTION("MORUS-640 AEAD algorithm");
543MODULE_ALIAS_CRYPTO("morus640");
544MODULE_ALIAS_CRYPTO("morus640-generic");
diff --git a/include/crypto/morus_common.h b/include/crypto/morus_common.h
new file mode 100644
index 000000000000..39f28c749951
--- /dev/null
+++ b/include/crypto/morus_common.h
@@ -0,0 +1,23 @@
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * The MORUS Authenticated-Encryption Algorithm
4 * Common definitions
5 *
6 * Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
7 * Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 */
14
15#ifndef _CRYPTO_MORUS_COMMON_H
16#define _CRYPTO_MORUS_COMMON_H
17
18#define MORUS_BLOCK_WORDS 4
19#define MORUS_STATE_BLOCKS 5
20#define MORUS_NONCE_SIZE 16
21#define MORUS_MAX_AUTH_SIZE 16
22
23#endif /* _CRYPTO_MORUS_COMMON_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-21 17:41:48 -0400