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Copyright consolidation 05/10
[thirdparty/openssl.git] / crypto / evp / e_aes_cbc_hmac_sha256.c
1 /*
2 * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <openssl/opensslconf.h>
11
12 #include <stdio.h>
13 #include <string.h>
14
15
16 #include <openssl/evp.h>
17 #include <openssl/objects.h>
18 #include <openssl/aes.h>
19 #include <openssl/sha.h>
20 #include <openssl/rand.h>
21 #include "modes_lcl.h"
22 #include "internal/constant_time_locl.h"
23 #include "internal/evp_int.h"
24
25 #ifndef EVP_CIPH_FLAG_AEAD_CIPHER
26 # define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
27 # define EVP_CTRL_AEAD_TLS1_AAD 0x16
28 # define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
29 #endif
30
31 #if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1)
32 # define EVP_CIPH_FLAG_DEFAULT_ASN1 0
33 #endif
34
35 #if !defined(EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK)
36 # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0
37 #endif
38
39 #define TLS1_1_VERSION 0x0302
40
41 typedef struct {
42 AES_KEY ks;
43 SHA256_CTX head, tail, md;
44 size_t payload_length; /* AAD length in decrypt case */
45 union {
46 unsigned int tls_ver;
47 unsigned char tls_aad[16]; /* 13 used */
48 } aux;
49 } EVP_AES_HMAC_SHA256;
50
51 # define NO_PAYLOAD_LENGTH ((size_t)-1)
52
53 #if defined(AES_ASM) && ( \
54 defined(__x86_64) || defined(__x86_64__) || \
55 defined(_M_AMD64) || defined(_M_X64) )
56
57 extern unsigned int OPENSSL_ia32cap_P[];
58 # define AESNI_CAPABLE (1<<(57-32))
59
60 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
61 AES_KEY *key);
62 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
63 AES_KEY *key);
64
65 void aesni_cbc_encrypt(const unsigned char *in,
66 unsigned char *out,
67 size_t length,
68 const AES_KEY *key, unsigned char *ivec, int enc);
69
70 int aesni_cbc_sha256_enc(const void *inp, void *out, size_t blocks,
71 const AES_KEY *key, unsigned char iv[16],
72 SHA256_CTX *ctx, const void *in0);
73
74 # define data(ctx) ((EVP_AES_HMAC_SHA256 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
75
76 static int aesni_cbc_hmac_sha256_init_key(EVP_CIPHER_CTX *ctx,
77 const unsigned char *inkey,
78 const unsigned char *iv, int enc)
79 {
80 EVP_AES_HMAC_SHA256 *key = data(ctx);
81 int ret;
82
83 if (enc)
84 memset(&key->ks, 0, sizeof(key->ks.rd_key)),
85 ret = aesni_set_encrypt_key(inkey,
86 EVP_CIPHER_CTX_key_length(ctx) * 8,
87 &key->ks);
88 else
89 ret = aesni_set_decrypt_key(inkey,
90 EVP_CIPHER_CTX_key_length(ctx) * 8,
91 &key->ks);
92
93 SHA256_Init(&key->head); /* handy when benchmarking */
94 key->tail = key->head;
95 key->md = key->head;
96
97 key->payload_length = NO_PAYLOAD_LENGTH;
98
99 return ret < 0 ? 0 : 1;
100 }
101
102 # define STITCHED_CALL
103
104 # if !defined(STITCHED_CALL)
105 # define aes_off 0
106 # endif
107
108 void sha256_block_data_order(void *c, const void *p, size_t len);
109
110 static void sha256_update(SHA256_CTX *c, const void *data, size_t len)
111 {
112 const unsigned char *ptr = data;
113 size_t res;
114
115 if ((res = c->num)) {
116 res = SHA256_CBLOCK - res;
117 if (len < res)
118 res = len;
119 SHA256_Update(c, ptr, res);
120 ptr += res;
121 len -= res;
122 }
123
124 res = len % SHA256_CBLOCK;
125 len -= res;
126
127 if (len) {
128 sha256_block_data_order(c, ptr, len / SHA256_CBLOCK);
129
130 ptr += len;
131 c->Nh += len >> 29;
132 c->Nl += len <<= 3;
133 if (c->Nl < (unsigned int)len)
134 c->Nh++;
135 }
136
137 if (res)
138 SHA256_Update(c, ptr, res);
139 }
140
141 # ifdef SHA256_Update
142 # undef SHA256_Update
143 # endif
144 # define SHA256_Update sha256_update
145
146 # if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
147
148 typedef struct {
149 unsigned int A[8], B[8], C[8], D[8], E[8], F[8], G[8], H[8];
150 } SHA256_MB_CTX;
151 typedef struct {
152 const unsigned char *ptr;
153 int blocks;
154 } HASH_DESC;
155
156 void sha256_multi_block(SHA256_MB_CTX *, const HASH_DESC *, int);
157
158 typedef struct {
159 const unsigned char *inp;
160 unsigned char *out;
161 int blocks;
162 u64 iv[2];
163 } CIPH_DESC;
164
165 void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
166
167 static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA256 *key,
168 unsigned char *out,
169 const unsigned char *inp,
170 size_t inp_len, int n4x)
171 { /* n4x is 1 or 2 */
172 HASH_DESC hash_d[8], edges[8];
173 CIPH_DESC ciph_d[8];
174 unsigned char storage[sizeof(SHA256_MB_CTX) + 32];
175 union {
176 u64 q[16];
177 u32 d[32];
178 u8 c[128];
179 } blocks[8];
180 SHA256_MB_CTX *ctx;
181 unsigned int frag, last, packlen, i, x4 = 4 * n4x, minblocks, processed =
182 0;
183 size_t ret = 0;
184 u8 *IVs;
185 # if defined(BSWAP8)
186 u64 seqnum;
187 # endif
188
189 /* ask for IVs in bulk */
190 if (RAND_bytes((IVs = blocks[0].c), 16 * x4) <= 0)
191 return 0;
192
193 /* align */
194 ctx = (SHA256_MB_CTX *) (storage + 32 - ((size_t)storage % 32));
195
196 frag = (unsigned int)inp_len >> (1 + n4x);
197 last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
198 if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
199 frag++;
200 last -= x4 - 1;
201 }
202
203 packlen = 5 + 16 + ((frag + 32 + 16) & -16);
204
205 /* populate descriptors with pointers and IVs */
206 hash_d[0].ptr = inp;
207 ciph_d[0].inp = inp;
208 /* 5+16 is place for header and explicit IV */
209 ciph_d[0].out = out + 5 + 16;
210 memcpy(ciph_d[0].out - 16, IVs, 16);
211 memcpy(ciph_d[0].iv, IVs, 16);
212 IVs += 16;
213
214 for (i = 1; i < x4; i++) {
215 ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
216 ciph_d[i].out = ciph_d[i - 1].out + packlen;
217 memcpy(ciph_d[i].out - 16, IVs, 16);
218 memcpy(ciph_d[i].iv, IVs, 16);
219 IVs += 16;
220 }
221
222 # if defined(BSWAP8)
223 memcpy(blocks[0].c, key->md.data, 8);
224 seqnum = BSWAP8(blocks[0].q[0]);
225 # endif
226 for (i = 0; i < x4; i++) {
227 unsigned int len = (i == (x4 - 1) ? last : frag);
228 # if !defined(BSWAP8)
229 unsigned int carry, j;
230 # endif
231
232 ctx->A[i] = key->md.h[0];
233 ctx->B[i] = key->md.h[1];
234 ctx->C[i] = key->md.h[2];
235 ctx->D[i] = key->md.h[3];
236 ctx->E[i] = key->md.h[4];
237 ctx->F[i] = key->md.h[5];
238 ctx->G[i] = key->md.h[6];
239 ctx->H[i] = key->md.h[7];
240
241 /* fix seqnum */
242 # if defined(BSWAP8)
243 blocks[i].q[0] = BSWAP8(seqnum + i);
244 # else
245 for (carry = i, j = 8; j--;) {
246 blocks[i].c[j] = ((u8 *)key->md.data)[j] + carry;
247 carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1);
248 }
249 # endif
250 blocks[i].c[8] = ((u8 *)key->md.data)[8];
251 blocks[i].c[9] = ((u8 *)key->md.data)[9];
252 blocks[i].c[10] = ((u8 *)key->md.data)[10];
253 /* fix length */
254 blocks[i].c[11] = (u8)(len >> 8);
255 blocks[i].c[12] = (u8)(len);
256
257 memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13);
258 hash_d[i].ptr += 64 - 13;
259 hash_d[i].blocks = (len - (64 - 13)) / 64;
260
261 edges[i].ptr = blocks[i].c;
262 edges[i].blocks = 1;
263 }
264
265 /* hash 13-byte headers and first 64-13 bytes of inputs */
266 sha256_multi_block(ctx, edges, n4x);
267 /* hash bulk inputs */
268 # define MAXCHUNKSIZE 2048
269 # if MAXCHUNKSIZE%64
270 # error "MAXCHUNKSIZE is not divisible by 64"
271 # elif MAXCHUNKSIZE
272 /*
273 * goal is to minimize pressure on L1 cache by moving in shorter steps,
274 * so that hashed data is still in the cache by the time we encrypt it
275 */
276 minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64;
277 if (minblocks > MAXCHUNKSIZE / 64) {
278 for (i = 0; i < x4; i++) {
279 edges[i].ptr = hash_d[i].ptr;
280 edges[i].blocks = MAXCHUNKSIZE / 64;
281 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
282 }
283 do {
284 sha256_multi_block(ctx, edges, n4x);
285 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
286
287 for (i = 0; i < x4; i++) {
288 edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE;
289 hash_d[i].blocks -= MAXCHUNKSIZE / 64;
290 edges[i].blocks = MAXCHUNKSIZE / 64;
291 ciph_d[i].inp += MAXCHUNKSIZE;
292 ciph_d[i].out += MAXCHUNKSIZE;
293 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
294 memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16);
295 }
296 processed += MAXCHUNKSIZE;
297 minblocks -= MAXCHUNKSIZE / 64;
298 } while (minblocks > MAXCHUNKSIZE / 64);
299 }
300 # endif
301 # undef MAXCHUNKSIZE
302 sha256_multi_block(ctx, hash_d, n4x);
303
304 memset(blocks, 0, sizeof(blocks));
305 for (i = 0; i < x4; i++) {
306 unsigned int len = (i == (x4 - 1) ? last : frag),
307 off = hash_d[i].blocks * 64;
308 const unsigned char *ptr = hash_d[i].ptr + off;
309
310 off = (len - processed) - (64 - 13) - off; /* remainder actually */
311 memcpy(blocks[i].c, ptr, off);
312 blocks[i].c[off] = 0x80;
313 len += 64 + 13; /* 64 is HMAC header */
314 len *= 8; /* convert to bits */
315 if (off < (64 - 8)) {
316 # ifdef BSWAP4
317 blocks[i].d[15] = BSWAP4(len);
318 # else
319 PUTU32(blocks[i].c + 60, len);
320 # endif
321 edges[i].blocks = 1;
322 } else {
323 # ifdef BSWAP4
324 blocks[i].d[31] = BSWAP4(len);
325 # else
326 PUTU32(blocks[i].c + 124, len);
327 # endif
328 edges[i].blocks = 2;
329 }
330 edges[i].ptr = blocks[i].c;
331 }
332
333 /* hash input tails and finalize */
334 sha256_multi_block(ctx, edges, n4x);
335
336 memset(blocks, 0, sizeof(blocks));
337 for (i = 0; i < x4; i++) {
338 # ifdef BSWAP4
339 blocks[i].d[0] = BSWAP4(ctx->A[i]);
340 ctx->A[i] = key->tail.h[0];
341 blocks[i].d[1] = BSWAP4(ctx->B[i]);
342 ctx->B[i] = key->tail.h[1];
343 blocks[i].d[2] = BSWAP4(ctx->C[i]);
344 ctx->C[i] = key->tail.h[2];
345 blocks[i].d[3] = BSWAP4(ctx->D[i]);
346 ctx->D[i] = key->tail.h[3];
347 blocks[i].d[4] = BSWAP4(ctx->E[i]);
348 ctx->E[i] = key->tail.h[4];
349 blocks[i].d[5] = BSWAP4(ctx->F[i]);
350 ctx->F[i] = key->tail.h[5];
351 blocks[i].d[6] = BSWAP4(ctx->G[i]);
352 ctx->G[i] = key->tail.h[6];
353 blocks[i].d[7] = BSWAP4(ctx->H[i]);
354 ctx->H[i] = key->tail.h[7];
355 blocks[i].c[32] = 0x80;
356 blocks[i].d[15] = BSWAP4((64 + 32) * 8);
357 # else
358 PUTU32(blocks[i].c + 0, ctx->A[i]);
359 ctx->A[i] = key->tail.h[0];
360 PUTU32(blocks[i].c + 4, ctx->B[i]);
361 ctx->B[i] = key->tail.h[1];
362 PUTU32(blocks[i].c + 8, ctx->C[i]);
363 ctx->C[i] = key->tail.h[2];
364 PUTU32(blocks[i].c + 12, ctx->D[i]);
365 ctx->D[i] = key->tail.h[3];
366 PUTU32(blocks[i].c + 16, ctx->E[i]);
367 ctx->E[i] = key->tail.h[4];
368 PUTU32(blocks[i].c + 20, ctx->F[i]);
369 ctx->F[i] = key->tail.h[5];
370 PUTU32(blocks[i].c + 24, ctx->G[i]);
371 ctx->G[i] = key->tail.h[6];
372 PUTU32(blocks[i].c + 28, ctx->H[i]);
373 ctx->H[i] = key->tail.h[7];
374 blocks[i].c[32] = 0x80;
375 PUTU32(blocks[i].c + 60, (64 + 32) * 8);
376 # endif
377 edges[i].ptr = blocks[i].c;
378 edges[i].blocks = 1;
379 }
380
381 /* finalize MACs */
382 sha256_multi_block(ctx, edges, n4x);
383
384 for (i = 0; i < x4; i++) {
385 unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
386 unsigned char *out0 = out;
387
388 memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
389 ciph_d[i].inp = ciph_d[i].out;
390
391 out += 5 + 16 + len;
392
393 /* write MAC */
394 PUTU32(out + 0, ctx->A[i]);
395 PUTU32(out + 4, ctx->B[i]);
396 PUTU32(out + 8, ctx->C[i]);
397 PUTU32(out + 12, ctx->D[i]);
398 PUTU32(out + 16, ctx->E[i]);
399 PUTU32(out + 20, ctx->F[i]);
400 PUTU32(out + 24, ctx->G[i]);
401 PUTU32(out + 28, ctx->H[i]);
402 out += 32;
403 len += 32;
404
405 /* pad */
406 pad = 15 - len % 16;
407 for (j = 0; j <= pad; j++)
408 *(out++) = pad;
409 len += pad + 1;
410
411 ciph_d[i].blocks = (len - processed) / 16;
412 len += 16; /* account for explicit iv */
413
414 /* arrange header */
415 out0[0] = ((u8 *)key->md.data)[8];
416 out0[1] = ((u8 *)key->md.data)[9];
417 out0[2] = ((u8 *)key->md.data)[10];
418 out0[3] = (u8)(len >> 8);
419 out0[4] = (u8)(len);
420
421 ret += len + 5;
422 inp += frag;
423 }
424
425 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
426
427 OPENSSL_cleanse(blocks, sizeof(blocks));
428 OPENSSL_cleanse(ctx, sizeof(*ctx));
429
430 return ret;
431 }
432 # endif
433
434 static int aesni_cbc_hmac_sha256_cipher(EVP_CIPHER_CTX *ctx,
435 unsigned char *out,
436 const unsigned char *in, size_t len)
437 {
438 EVP_AES_HMAC_SHA256 *key = data(ctx);
439 unsigned int l;
440 size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
441 * later */
442 sha_off = 0;
443 # if defined(STITCHED_CALL)
444 size_t aes_off = 0, blocks;
445
446 sha_off = SHA256_CBLOCK - key->md.num;
447 # endif
448
449 key->payload_length = NO_PAYLOAD_LENGTH;
450
451 if (len % AES_BLOCK_SIZE)
452 return 0;
453
454 if (EVP_CIPHER_CTX_encrypting(ctx)) {
455 if (plen == NO_PAYLOAD_LENGTH)
456 plen = len;
457 else if (len !=
458 ((plen + SHA256_DIGEST_LENGTH +
459 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
460 return 0;
461 else if (key->aux.tls_ver >= TLS1_1_VERSION)
462 iv = AES_BLOCK_SIZE;
463
464 # if defined(STITCHED_CALL)
465 /*
466 * Assembly stitch handles AVX-capable processors, but its
467 * performance is not optimal on AMD Jaguar, ~40% worse, for
468 * unknown reasons. Incidentally processor in question supports
469 * AVX, but not AMD-specific XOP extension, which can be used
470 * to identify it and avoid stitch invocation. So that after we
471 * establish that current CPU supports AVX, we even see if it's
472 * either even XOP-capable Bulldozer-based or GenuineIntel one.
473 */
474 if (OPENSSL_ia32cap_P[1] & (1 << (60 - 32)) && /* AVX? */
475 ((OPENSSL_ia32cap_P[1] & (1 << (43 - 32))) /* XOP? */
476 | (OPENSSL_ia32cap_P[0] & (1<<30))) && /* "Intel CPU"? */
477 plen > (sha_off + iv) &&
478 (blocks = (plen - (sha_off + iv)) / SHA256_CBLOCK)) {
479 SHA256_Update(&key->md, in + iv, sha_off);
480
481 (void)aesni_cbc_sha256_enc(in, out, blocks, &key->ks,
482 EVP_CIPHER_CTX_iv_noconst(ctx),
483 &key->md, in + iv + sha_off);
484 blocks *= SHA256_CBLOCK;
485 aes_off += blocks;
486 sha_off += blocks;
487 key->md.Nh += blocks >> 29;
488 key->md.Nl += blocks <<= 3;
489 if (key->md.Nl < (unsigned int)blocks)
490 key->md.Nh++;
491 } else {
492 sha_off = 0;
493 }
494 # endif
495 sha_off += iv;
496 SHA256_Update(&key->md, in + sha_off, plen - sha_off);
497
498 if (plen != len) { /* "TLS" mode of operation */
499 if (in != out)
500 memcpy(out + aes_off, in + aes_off, plen - aes_off);
501
502 /* calculate HMAC and append it to payload */
503 SHA256_Final(out + plen, &key->md);
504 key->md = key->tail;
505 SHA256_Update(&key->md, out + plen, SHA256_DIGEST_LENGTH);
506 SHA256_Final(out + plen, &key->md);
507
508 /* pad the payload|hmac */
509 plen += SHA256_DIGEST_LENGTH;
510 for (l = len - plen - 1; plen < len; plen++)
511 out[plen] = l;
512 /* encrypt HMAC|padding at once */
513 aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
514 &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
515 } else {
516 aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
517 &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
518 }
519 } else {
520 union {
521 unsigned int u[SHA256_DIGEST_LENGTH / sizeof(unsigned int)];
522 unsigned char c[64 + SHA256_DIGEST_LENGTH];
523 } mac, *pmac;
524
525 /* arrange cache line alignment */
526 pmac = (void *)(((size_t)mac.c + 63) & ((size_t)0 - 64));
527
528 /* decrypt HMAC|padding at once */
529 aesni_cbc_encrypt(in, out, len, &key->ks,
530 EVP_CIPHER_CTX_iv_noconst(ctx), 0);
531
532 if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
533 size_t inp_len, mask, j, i;
534 unsigned int res, maxpad, pad, bitlen;
535 int ret = 1;
536 union {
537 unsigned int u[SHA_LBLOCK];
538 unsigned char c[SHA256_CBLOCK];
539 } *data = (void *)key->md.data;
540
541 if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
542 >= TLS1_1_VERSION)
543 iv = AES_BLOCK_SIZE;
544
545 if (len < (iv + SHA256_DIGEST_LENGTH + 1))
546 return 0;
547
548 /* omit explicit iv */
549 out += iv;
550 len -= iv;
551
552 /* figure out payload length */
553 pad = out[len - 1];
554 maxpad = len - (SHA256_DIGEST_LENGTH + 1);
555 maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
556 maxpad &= 255;
557
558 ret &= constant_time_ge(maxpad, pad);
559
560 inp_len = len - (SHA256_DIGEST_LENGTH + pad + 1);
561 mask = (0 - ((inp_len - len) >> (sizeof(inp_len) * 8 - 1)));
562 inp_len &= mask;
563 ret &= (int)mask;
564
565 key->aux.tls_aad[plen - 2] = inp_len >> 8;
566 key->aux.tls_aad[plen - 1] = inp_len;
567
568 /* calculate HMAC */
569 key->md = key->head;
570 SHA256_Update(&key->md, key->aux.tls_aad, plen);
571
572 # if 1
573 len -= SHA256_DIGEST_LENGTH; /* amend mac */
574 if (len >= (256 + SHA256_CBLOCK)) {
575 j = (len - (256 + SHA256_CBLOCK)) & (0 - SHA256_CBLOCK);
576 j += SHA256_CBLOCK - key->md.num;
577 SHA256_Update(&key->md, out, j);
578 out += j;
579 len -= j;
580 inp_len -= j;
581 }
582
583 /* but pretend as if we hashed padded payload */
584 bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
585 # ifdef BSWAP4
586 bitlen = BSWAP4(bitlen);
587 # else
588 mac.c[0] = 0;
589 mac.c[1] = (unsigned char)(bitlen >> 16);
590 mac.c[2] = (unsigned char)(bitlen >> 8);
591 mac.c[3] = (unsigned char)bitlen;
592 bitlen = mac.u[0];
593 # endif
594
595 pmac->u[0] = 0;
596 pmac->u[1] = 0;
597 pmac->u[2] = 0;
598 pmac->u[3] = 0;
599 pmac->u[4] = 0;
600 pmac->u[5] = 0;
601 pmac->u[6] = 0;
602 pmac->u[7] = 0;
603
604 for (res = key->md.num, j = 0; j < len; j++) {
605 size_t c = out[j];
606 mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
607 c &= mask;
608 c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
609 data->c[res++] = (unsigned char)c;
610
611 if (res != SHA256_CBLOCK)
612 continue;
613
614 /* j is not incremented yet */
615 mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
616 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
617 sha256_block_data_order(&key->md, data, 1);
618 mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
619 pmac->u[0] |= key->md.h[0] & mask;
620 pmac->u[1] |= key->md.h[1] & mask;
621 pmac->u[2] |= key->md.h[2] & mask;
622 pmac->u[3] |= key->md.h[3] & mask;
623 pmac->u[4] |= key->md.h[4] & mask;
624 pmac->u[5] |= key->md.h[5] & mask;
625 pmac->u[6] |= key->md.h[6] & mask;
626 pmac->u[7] |= key->md.h[7] & mask;
627 res = 0;
628 }
629
630 for (i = res; i < SHA256_CBLOCK; i++, j++)
631 data->c[i] = 0;
632
633 if (res > SHA256_CBLOCK - 8) {
634 mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
635 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
636 sha256_block_data_order(&key->md, data, 1);
637 mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
638 pmac->u[0] |= key->md.h[0] & mask;
639 pmac->u[1] |= key->md.h[1] & mask;
640 pmac->u[2] |= key->md.h[2] & mask;
641 pmac->u[3] |= key->md.h[3] & mask;
642 pmac->u[4] |= key->md.h[4] & mask;
643 pmac->u[5] |= key->md.h[5] & mask;
644 pmac->u[6] |= key->md.h[6] & mask;
645 pmac->u[7] |= key->md.h[7] & mask;
646
647 memset(data, 0, SHA256_CBLOCK);
648 j += 64;
649 }
650 data->u[SHA_LBLOCK - 1] = bitlen;
651 sha256_block_data_order(&key->md, data, 1);
652 mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
653 pmac->u[0] |= key->md.h[0] & mask;
654 pmac->u[1] |= key->md.h[1] & mask;
655 pmac->u[2] |= key->md.h[2] & mask;
656 pmac->u[3] |= key->md.h[3] & mask;
657 pmac->u[4] |= key->md.h[4] & mask;
658 pmac->u[5] |= key->md.h[5] & mask;
659 pmac->u[6] |= key->md.h[6] & mask;
660 pmac->u[7] |= key->md.h[7] & mask;
661
662 # ifdef BSWAP4
663 pmac->u[0] = BSWAP4(pmac->u[0]);
664 pmac->u[1] = BSWAP4(pmac->u[1]);
665 pmac->u[2] = BSWAP4(pmac->u[2]);
666 pmac->u[3] = BSWAP4(pmac->u[3]);
667 pmac->u[4] = BSWAP4(pmac->u[4]);
668 pmac->u[5] = BSWAP4(pmac->u[5]);
669 pmac->u[6] = BSWAP4(pmac->u[6]);
670 pmac->u[7] = BSWAP4(pmac->u[7]);
671 # else
672 for (i = 0; i < 8; i++) {
673 res = pmac->u[i];
674 pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
675 pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
676 pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
677 pmac->c[4 * i + 3] = (unsigned char)res;
678 }
679 # endif
680 len += SHA256_DIGEST_LENGTH;
681 # else
682 SHA256_Update(&key->md, out, inp_len);
683 res = key->md.num;
684 SHA256_Final(pmac->c, &key->md);
685
686 {
687 unsigned int inp_blocks, pad_blocks;
688
689 /* but pretend as if we hashed padded payload */
690 inp_blocks =
691 1 + ((SHA256_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
692 res += (unsigned int)(len - inp_len);
693 pad_blocks = res / SHA256_CBLOCK;
694 res %= SHA256_CBLOCK;
695 pad_blocks +=
696 1 + ((SHA256_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
697 for (; inp_blocks < pad_blocks; inp_blocks++)
698 sha1_block_data_order(&key->md, data, 1);
699 }
700 # endif
701 key->md = key->tail;
702 SHA256_Update(&key->md, pmac->c, SHA256_DIGEST_LENGTH);
703 SHA256_Final(pmac->c, &key->md);
704
705 /* verify HMAC */
706 out += inp_len;
707 len -= inp_len;
708 # if 1
709 {
710 unsigned char *p =
711 out + len - 1 - maxpad - SHA256_DIGEST_LENGTH;
712 size_t off = out - p;
713 unsigned int c, cmask;
714
715 maxpad += SHA256_DIGEST_LENGTH;
716 for (res = 0, i = 0, j = 0; j < maxpad; j++) {
717 c = p[j];
718 cmask =
719 ((int)(j - off - SHA256_DIGEST_LENGTH)) >>
720 (sizeof(int) * 8 - 1);
721 res |= (c ^ pad) & ~cmask; /* ... and padding */
722 cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
723 res |= (c ^ pmac->c[i]) & cmask;
724 i += 1 & cmask;
725 }
726 maxpad -= SHA256_DIGEST_LENGTH;
727
728 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
729 ret &= (int)~res;
730 }
731 # else
732 for (res = 0, i = 0; i < SHA256_DIGEST_LENGTH; i++)
733 res |= out[i] ^ pmac->c[i];
734 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
735 ret &= (int)~res;
736
737 /* verify padding */
738 pad = (pad & ~res) | (maxpad & res);
739 out = out + len - 1 - pad;
740 for (res = 0, i = 0; i < pad; i++)
741 res |= out[i] ^ pad;
742
743 res = (0 - res) >> (sizeof(res) * 8 - 1);
744 ret &= (int)~res;
745 # endif
746 return ret;
747 } else {
748 SHA256_Update(&key->md, out, len);
749 }
750 }
751
752 return 1;
753 }
754
755 static int aesni_cbc_hmac_sha256_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
756 void *ptr)
757 {
758 EVP_AES_HMAC_SHA256 *key = data(ctx);
759 unsigned int u_arg = (unsigned int)arg;
760
761 switch (type) {
762 case EVP_CTRL_AEAD_SET_MAC_KEY:
763 {
764 unsigned int i;
765 unsigned char hmac_key[64];
766
767 memset(hmac_key, 0, sizeof(hmac_key));
768
769 if (arg < 0)
770 return -1;
771
772 if (u_arg > sizeof(hmac_key)) {
773 SHA256_Init(&key->head);
774 SHA256_Update(&key->head, ptr, arg);
775 SHA256_Final(hmac_key, &key->head);
776 } else {
777 memcpy(hmac_key, ptr, arg);
778 }
779
780 for (i = 0; i < sizeof(hmac_key); i++)
781 hmac_key[i] ^= 0x36; /* ipad */
782 SHA256_Init(&key->head);
783 SHA256_Update(&key->head, hmac_key, sizeof(hmac_key));
784
785 for (i = 0; i < sizeof(hmac_key); i++)
786 hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
787 SHA256_Init(&key->tail);
788 SHA256_Update(&key->tail, hmac_key, sizeof(hmac_key));
789
790 OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
791
792 return 1;
793 }
794 case EVP_CTRL_AEAD_TLS1_AAD:
795 {
796 unsigned char *p = ptr;
797 unsigned int len = p[arg - 2] << 8 | p[arg - 1];
798
799 if (arg != EVP_AEAD_TLS1_AAD_LEN)
800 return -1;
801
802 if (EVP_CIPHER_CTX_encrypting(ctx)) {
803 key->payload_length = len;
804 if ((key->aux.tls_ver =
805 p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
806 len -= AES_BLOCK_SIZE;
807 p[arg - 2] = len >> 8;
808 p[arg - 1] = len;
809 }
810 key->md = key->head;
811 SHA256_Update(&key->md, p, arg);
812
813 return (int)(((len + SHA256_DIGEST_LENGTH +
814 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
815 - len);
816 } else {
817 memcpy(key->aux.tls_aad, ptr, arg);
818 key->payload_length = arg;
819
820 return SHA256_DIGEST_LENGTH;
821 }
822 }
823 # if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
824 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
825 return (int)(5 + 16 + ((arg + 32 + 16) & -16));
826 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
827 {
828 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
829 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
830 unsigned int n4x = 1, x4;
831 unsigned int frag, last, packlen, inp_len;
832
833 if (arg < 0)
834 return -1;
835
836 if (u_arg < sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
837 return -1;
838
839 inp_len = param->inp[11] << 8 | param->inp[12];
840
841 if (EVP_CIPHER_CTX_encrypting(ctx)) {
842 if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
843 return -1;
844
845 if (inp_len) {
846 if (inp_len < 4096)
847 return 0; /* too short */
848
849 if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
850 n4x = 2; /* AVX2 */
851 } else if ((n4x = param->interleave / 4) && n4x <= 2)
852 inp_len = param->len;
853 else
854 return -1;
855
856 key->md = key->head;
857 SHA256_Update(&key->md, param->inp, 13);
858
859 x4 = 4 * n4x;
860 n4x += 1;
861
862 frag = inp_len >> n4x;
863 last = inp_len + frag - (frag << n4x);
864 if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
865 frag++;
866 last -= x4 - 1;
867 }
868
869 packlen = 5 + 16 + ((frag + 32 + 16) & -16);
870 packlen = (packlen << n4x) - packlen;
871 packlen += 5 + 16 + ((last + 32 + 16) & -16);
872
873 param->interleave = x4;
874
875 return (int)packlen;
876 } else
877 return -1; /* not yet */
878 }
879 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
880 {
881 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
882 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
883
884 return (int)tls1_1_multi_block_encrypt(key, param->out,
885 param->inp, param->len,
886 param->interleave / 4);
887 }
888 case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
889 # endif
890 default:
891 return -1;
892 }
893 }
894
895 static EVP_CIPHER aesni_128_cbc_hmac_sha256_cipher = {
896 # ifdef NID_aes_128_cbc_hmac_sha256
897 NID_aes_128_cbc_hmac_sha256,
898 # else
899 NID_undef,
900 # endif
901 AES_BLOCK_SIZE, 16, AES_BLOCK_SIZE,
902 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
903 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
904 aesni_cbc_hmac_sha256_init_key,
905 aesni_cbc_hmac_sha256_cipher,
906 NULL,
907 sizeof(EVP_AES_HMAC_SHA256),
908 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
909 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
910 aesni_cbc_hmac_sha256_ctrl,
911 NULL
912 };
913
914 static EVP_CIPHER aesni_256_cbc_hmac_sha256_cipher = {
915 # ifdef NID_aes_256_cbc_hmac_sha256
916 NID_aes_256_cbc_hmac_sha256,
917 # else
918 NID_undef,
919 # endif
920 AES_BLOCK_SIZE, 32, AES_BLOCK_SIZE,
921 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
922 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
923 aesni_cbc_hmac_sha256_init_key,
924 aesni_cbc_hmac_sha256_cipher,
925 NULL,
926 sizeof(EVP_AES_HMAC_SHA256),
927 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
928 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
929 aesni_cbc_hmac_sha256_ctrl,
930 NULL
931 };
932
933 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
934 {
935 return ((OPENSSL_ia32cap_P[1] & AESNI_CAPABLE) &&
936 aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL) ?
937 &aesni_128_cbc_hmac_sha256_cipher : NULL);
938 }
939
940 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
941 {
942 return ((OPENSSL_ia32cap_P[1] & AESNI_CAPABLE) &&
943 aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL) ?
944 &aesni_256_cbc_hmac_sha256_cipher : NULL);
945 }
946 #else
947 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
948 {
949 return NULL;
950 }
951
952 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
953 {
954 return NULL;
955 }
956 #endif
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