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Copyright consolidation 05/10
[thirdparty/openssl.git] / crypto / evp / e_aes_cbc_hmac_sha1.c
1 /*
2 * Copyright 2011-2016 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 #include <openssl/evp.h>
16 #include <openssl/objects.h>
17 #include <openssl/aes.h>
18 #include <openssl/sha.h>
19 #include <openssl/rand.h>
20 #include "modes_lcl.h"
21 #include "internal/evp_int.h"
22 #include "internal/constant_time_locl.h"
23
24 #ifndef EVP_CIPH_FLAG_AEAD_CIPHER
25 # define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
26 # define EVP_CTRL_AEAD_TLS1_AAD 0x16
27 # define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
28 #endif
29
30 #if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1)
31 # define EVP_CIPH_FLAG_DEFAULT_ASN1 0
32 #endif
33
34 #if !defined(EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK)
35 # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0
36 #endif
37
38 #define TLS1_1_VERSION 0x0302
39
40 typedef struct {
41 AES_KEY ks;
42 SHA_CTX head, tail, md;
43 size_t payload_length; /* AAD length in decrypt case */
44 union {
45 unsigned int tls_ver;
46 unsigned char tls_aad[16]; /* 13 used */
47 } aux;
48 } EVP_AES_HMAC_SHA1;
49
50 #define NO_PAYLOAD_LENGTH ((size_t)-1)
51
52 #if defined(AES_ASM) && ( \
53 defined(__x86_64) || defined(__x86_64__) || \
54 defined(_M_AMD64) || defined(_M_X64) )
55
56 extern unsigned int OPENSSL_ia32cap_P[];
57 # define AESNI_CAPABLE (1<<(57-32))
58
59 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
60 AES_KEY *key);
61 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
62 AES_KEY *key);
63
64 void aesni_cbc_encrypt(const unsigned char *in,
65 unsigned char *out,
66 size_t length,
67 const AES_KEY *key, unsigned char *ivec, int enc);
68
69 void aesni_cbc_sha1_enc(const void *inp, void *out, size_t blocks,
70 const AES_KEY *key, unsigned char iv[16],
71 SHA_CTX *ctx, const void *in0);
72
73 void aesni256_cbc_sha1_dec(const void *inp, void *out, size_t blocks,
74 const AES_KEY *key, unsigned char iv[16],
75 SHA_CTX *ctx, const void *in0);
76
77 # define data(ctx) ((EVP_AES_HMAC_SHA1 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
78
79 static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
80 const unsigned char *inkey,
81 const unsigned char *iv, int enc)
82 {
83 EVP_AES_HMAC_SHA1 *key = data(ctx);
84 int ret;
85
86 if (enc)
87 ret = aesni_set_encrypt_key(inkey,
88 EVP_CIPHER_CTX_key_length(ctx) * 8,
89 &key->ks);
90 else
91 ret = aesni_set_decrypt_key(inkey,
92 EVP_CIPHER_CTX_key_length(ctx) * 8,
93 &key->ks);
94
95 SHA1_Init(&key->head); /* handy when benchmarking */
96 key->tail = key->head;
97 key->md = key->head;
98
99 key->payload_length = NO_PAYLOAD_LENGTH;
100
101 return ret < 0 ? 0 : 1;
102 }
103
104 # define STITCHED_CALL
105 # undef STITCHED_DECRYPT_CALL
106
107 # if !defined(STITCHED_CALL)
108 # define aes_off 0
109 # endif
110
111 void sha1_block_data_order(void *c, const void *p, size_t len);
112
113 static void sha1_update(SHA_CTX *c, const void *data, size_t len)
114 {
115 const unsigned char *ptr = data;
116 size_t res;
117
118 if ((res = c->num)) {
119 res = SHA_CBLOCK - res;
120 if (len < res)
121 res = len;
122 SHA1_Update(c, ptr, res);
123 ptr += res;
124 len -= res;
125 }
126
127 res = len % SHA_CBLOCK;
128 len -= res;
129
130 if (len) {
131 sha1_block_data_order(c, ptr, len / SHA_CBLOCK);
132
133 ptr += len;
134 c->Nh += len >> 29;
135 c->Nl += len <<= 3;
136 if (c->Nl < (unsigned int)len)
137 c->Nh++;
138 }
139
140 if (res)
141 SHA1_Update(c, ptr, res);
142 }
143
144 # ifdef SHA1_Update
145 # undef SHA1_Update
146 # endif
147 # define SHA1_Update sha1_update
148
149 # if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
150
151 typedef struct {
152 unsigned int A[8], B[8], C[8], D[8], E[8];
153 } SHA1_MB_CTX;
154 typedef struct {
155 const unsigned char *ptr;
156 int blocks;
157 } HASH_DESC;
158
159 void sha1_multi_block(SHA1_MB_CTX *, const HASH_DESC *, int);
160
161 typedef struct {
162 const unsigned char *inp;
163 unsigned char *out;
164 int blocks;
165 u64 iv[2];
166 } CIPH_DESC;
167
168 void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
169
170 static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA1 *key,
171 unsigned char *out,
172 const unsigned char *inp,
173 size_t inp_len, int n4x)
174 { /* n4x is 1 or 2 */
175 HASH_DESC hash_d[8], edges[8];
176 CIPH_DESC ciph_d[8];
177 unsigned char storage[sizeof(SHA1_MB_CTX) + 32];
178 union {
179 u64 q[16];
180 u32 d[32];
181 u8 c[128];
182 } blocks[8];
183 SHA1_MB_CTX *ctx;
184 unsigned int frag, last, packlen, i, x4 = 4 * n4x, minblocks, processed =
185 0;
186 size_t ret = 0;
187 u8 *IVs;
188 # if defined(BSWAP8)
189 u64 seqnum;
190 # endif
191
192 /* ask for IVs in bulk */
193 if (RAND_bytes((IVs = blocks[0].c), 16 * x4) <= 0)
194 return 0;
195
196 ctx = (SHA1_MB_CTX *) (storage + 32 - ((size_t)storage % 32)); /* align */
197
198 frag = (unsigned int)inp_len >> (1 + n4x);
199 last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
200 if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
201 frag++;
202 last -= x4 - 1;
203 }
204
205 packlen = 5 + 16 + ((frag + 20 + 16) & -16);
206
207 /* populate descriptors with pointers and IVs */
208 hash_d[0].ptr = inp;
209 ciph_d[0].inp = inp;
210 /* 5+16 is place for header and explicit IV */
211 ciph_d[0].out = out + 5 + 16;
212 memcpy(ciph_d[0].out - 16, IVs, 16);
213 memcpy(ciph_d[0].iv, IVs, 16);
214 IVs += 16;
215
216 for (i = 1; i < x4; i++) {
217 ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
218 ciph_d[i].out = ciph_d[i - 1].out + packlen;
219 memcpy(ciph_d[i].out - 16, IVs, 16);
220 memcpy(ciph_d[i].iv, IVs, 16);
221 IVs += 16;
222 }
223
224 # if defined(BSWAP8)
225 memcpy(blocks[0].c, key->md.data, 8);
226 seqnum = BSWAP8(blocks[0].q[0]);
227 # endif
228 for (i = 0; i < x4; i++) {
229 unsigned int len = (i == (x4 - 1) ? last : frag);
230 # if !defined(BSWAP8)
231 unsigned int carry, j;
232 # endif
233
234 ctx->A[i] = key->md.h0;
235 ctx->B[i] = key->md.h1;
236 ctx->C[i] = key->md.h2;
237 ctx->D[i] = key->md.h3;
238 ctx->E[i] = key->md.h4;
239
240 /* fix seqnum */
241 # if defined(BSWAP8)
242 blocks[i].q[0] = BSWAP8(seqnum + i);
243 # else
244 for (carry = i, j = 8; j--;) {
245 blocks[i].c[j] = ((u8 *)key->md.data)[j] + carry;
246 carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1);
247 }
248 # endif
249 blocks[i].c[8] = ((u8 *)key->md.data)[8];
250 blocks[i].c[9] = ((u8 *)key->md.data)[9];
251 blocks[i].c[10] = ((u8 *)key->md.data)[10];
252 /* fix length */
253 blocks[i].c[11] = (u8)(len >> 8);
254 blocks[i].c[12] = (u8)(len);
255
256 memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13);
257 hash_d[i].ptr += 64 - 13;
258 hash_d[i].blocks = (len - (64 - 13)) / 64;
259
260 edges[i].ptr = blocks[i].c;
261 edges[i].blocks = 1;
262 }
263
264 /* hash 13-byte headers and first 64-13 bytes of inputs */
265 sha1_multi_block(ctx, edges, n4x);
266 /* hash bulk inputs */
267 # define MAXCHUNKSIZE 2048
268 # if MAXCHUNKSIZE%64
269 # error "MAXCHUNKSIZE is not divisible by 64"
270 # elif MAXCHUNKSIZE
271 /*
272 * goal is to minimize pressure on L1 cache by moving in shorter steps,
273 * so that hashed data is still in the cache by the time we encrypt it
274 */
275 minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64;
276 if (minblocks > MAXCHUNKSIZE / 64) {
277 for (i = 0; i < x4; i++) {
278 edges[i].ptr = hash_d[i].ptr;
279 edges[i].blocks = MAXCHUNKSIZE / 64;
280 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
281 }
282 do {
283 sha1_multi_block(ctx, edges, n4x);
284 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
285
286 for (i = 0; i < x4; i++) {
287 edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE;
288 hash_d[i].blocks -= MAXCHUNKSIZE / 64;
289 edges[i].blocks = MAXCHUNKSIZE / 64;
290 ciph_d[i].inp += MAXCHUNKSIZE;
291 ciph_d[i].out += MAXCHUNKSIZE;
292 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
293 memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16);
294 }
295 processed += MAXCHUNKSIZE;
296 minblocks -= MAXCHUNKSIZE / 64;
297 } while (minblocks > MAXCHUNKSIZE / 64);
298 }
299 # endif
300 # undef MAXCHUNKSIZE
301 sha1_multi_block(ctx, hash_d, n4x);
302
303 memset(blocks, 0, sizeof(blocks));
304 for (i = 0; i < x4; i++) {
305 unsigned int len = (i == (x4 - 1) ? last : frag),
306 off = hash_d[i].blocks * 64;
307 const unsigned char *ptr = hash_d[i].ptr + off;
308
309 off = (len - processed) - (64 - 13) - off; /* remainder actually */
310 memcpy(blocks[i].c, ptr, off);
311 blocks[i].c[off] = 0x80;
312 len += 64 + 13; /* 64 is HMAC header */
313 len *= 8; /* convert to bits */
314 if (off < (64 - 8)) {
315 # ifdef BSWAP4
316 blocks[i].d[15] = BSWAP4(len);
317 # else
318 PUTU32(blocks[i].c + 60, len);
319 # endif
320 edges[i].blocks = 1;
321 } else {
322 # ifdef BSWAP4
323 blocks[i].d[31] = BSWAP4(len);
324 # else
325 PUTU32(blocks[i].c + 124, len);
326 # endif
327 edges[i].blocks = 2;
328 }
329 edges[i].ptr = blocks[i].c;
330 }
331
332 /* hash input tails and finalize */
333 sha1_multi_block(ctx, edges, n4x);
334
335 memset(blocks, 0, sizeof(blocks));
336 for (i = 0; i < x4; i++) {
337 # ifdef BSWAP4
338 blocks[i].d[0] = BSWAP4(ctx->A[i]);
339 ctx->A[i] = key->tail.h0;
340 blocks[i].d[1] = BSWAP4(ctx->B[i]);
341 ctx->B[i] = key->tail.h1;
342 blocks[i].d[2] = BSWAP4(ctx->C[i]);
343 ctx->C[i] = key->tail.h2;
344 blocks[i].d[3] = BSWAP4(ctx->D[i]);
345 ctx->D[i] = key->tail.h3;
346 blocks[i].d[4] = BSWAP4(ctx->E[i]);
347 ctx->E[i] = key->tail.h4;
348 blocks[i].c[20] = 0x80;
349 blocks[i].d[15] = BSWAP4((64 + 20) * 8);
350 # else
351 PUTU32(blocks[i].c + 0, ctx->A[i]);
352 ctx->A[i] = key->tail.h0;
353 PUTU32(blocks[i].c + 4, ctx->B[i]);
354 ctx->B[i] = key->tail.h1;
355 PUTU32(blocks[i].c + 8, ctx->C[i]);
356 ctx->C[i] = key->tail.h2;
357 PUTU32(blocks[i].c + 12, ctx->D[i]);
358 ctx->D[i] = key->tail.h3;
359 PUTU32(blocks[i].c + 16, ctx->E[i]);
360 ctx->E[i] = key->tail.h4;
361 blocks[i].c[20] = 0x80;
362 PUTU32(blocks[i].c + 60, (64 + 20) * 8);
363 # endif
364 edges[i].ptr = blocks[i].c;
365 edges[i].blocks = 1;
366 }
367
368 /* finalize MACs */
369 sha1_multi_block(ctx, edges, n4x);
370
371 for (i = 0; i < x4; i++) {
372 unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
373 unsigned char *out0 = out;
374
375 memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
376 ciph_d[i].inp = ciph_d[i].out;
377
378 out += 5 + 16 + len;
379
380 /* write MAC */
381 PUTU32(out + 0, ctx->A[i]);
382 PUTU32(out + 4, ctx->B[i]);
383 PUTU32(out + 8, ctx->C[i]);
384 PUTU32(out + 12, ctx->D[i]);
385 PUTU32(out + 16, ctx->E[i]);
386 out += 20;
387 len += 20;
388
389 /* pad */
390 pad = 15 - len % 16;
391 for (j = 0; j <= pad; j++)
392 *(out++) = pad;
393 len += pad + 1;
394
395 ciph_d[i].blocks = (len - processed) / 16;
396 len += 16; /* account for explicit iv */
397
398 /* arrange header */
399 out0[0] = ((u8 *)key->md.data)[8];
400 out0[1] = ((u8 *)key->md.data)[9];
401 out0[2] = ((u8 *)key->md.data)[10];
402 out0[3] = (u8)(len >> 8);
403 out0[4] = (u8)(len);
404
405 ret += len + 5;
406 inp += frag;
407 }
408
409 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
410
411 OPENSSL_cleanse(blocks, sizeof(blocks));
412 OPENSSL_cleanse(ctx, sizeof(*ctx));
413
414 return ret;
415 }
416 # endif
417
418 static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
419 const unsigned char *in, size_t len)
420 {
421 EVP_AES_HMAC_SHA1 *key = data(ctx);
422 unsigned int l;
423 size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
424 * later */
425 sha_off = 0;
426 # if defined(STITCHED_CALL)
427 size_t aes_off = 0, blocks;
428
429 sha_off = SHA_CBLOCK - key->md.num;
430 # endif
431
432 key->payload_length = NO_PAYLOAD_LENGTH;
433
434 if (len % AES_BLOCK_SIZE)
435 return 0;
436
437 if (EVP_CIPHER_CTX_encrypting(ctx)) {
438 if (plen == NO_PAYLOAD_LENGTH)
439 plen = len;
440 else if (len !=
441 ((plen + SHA_DIGEST_LENGTH +
442 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
443 return 0;
444 else if (key->aux.tls_ver >= TLS1_1_VERSION)
445 iv = AES_BLOCK_SIZE;
446
447 # if defined(STITCHED_CALL)
448 if (plen > (sha_off + iv)
449 && (blocks = (plen - (sha_off + iv)) / SHA_CBLOCK)) {
450 SHA1_Update(&key->md, in + iv, sha_off);
451
452 aesni_cbc_sha1_enc(in, out, blocks, &key->ks,
453 EVP_CIPHER_CTX_iv_noconst(ctx),
454 &key->md, in + iv + sha_off);
455 blocks *= SHA_CBLOCK;
456 aes_off += blocks;
457 sha_off += blocks;
458 key->md.Nh += blocks >> 29;
459 key->md.Nl += blocks <<= 3;
460 if (key->md.Nl < (unsigned int)blocks)
461 key->md.Nh++;
462 } else {
463 sha_off = 0;
464 }
465 # endif
466 sha_off += iv;
467 SHA1_Update(&key->md, in + sha_off, plen - sha_off);
468
469 if (plen != len) { /* "TLS" mode of operation */
470 if (in != out)
471 memcpy(out + aes_off, in + aes_off, plen - aes_off);
472
473 /* calculate HMAC and append it to payload */
474 SHA1_Final(out + plen, &key->md);
475 key->md = key->tail;
476 SHA1_Update(&key->md, out + plen, SHA_DIGEST_LENGTH);
477 SHA1_Final(out + plen, &key->md);
478
479 /* pad the payload|hmac */
480 plen += SHA_DIGEST_LENGTH;
481 for (l = len - plen - 1; plen < len; plen++)
482 out[plen] = l;
483 /* encrypt HMAC|padding at once */
484 aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
485 &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
486 } else {
487 aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
488 &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
489 }
490 } else {
491 union {
492 unsigned int u[SHA_DIGEST_LENGTH / sizeof(unsigned int)];
493 unsigned char c[32 + SHA_DIGEST_LENGTH];
494 } mac, *pmac;
495
496 /* arrange cache line alignment */
497 pmac = (void *)(((size_t)mac.c + 31) & ((size_t)0 - 32));
498
499 if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
500 size_t inp_len, mask, j, i;
501 unsigned int res, maxpad, pad, bitlen;
502 int ret = 1;
503 union {
504 unsigned int u[SHA_LBLOCK];
505 unsigned char c[SHA_CBLOCK];
506 } *data = (void *)key->md.data;
507 # if defined(STITCHED_DECRYPT_CALL)
508 unsigned char tail_iv[AES_BLOCK_SIZE];
509 int stitch = 0;
510 # endif
511
512 if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
513 >= TLS1_1_VERSION) {
514 if (len < (AES_BLOCK_SIZE + SHA_DIGEST_LENGTH + 1))
515 return 0;
516
517 /* omit explicit iv */
518 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), in, AES_BLOCK_SIZE);
519
520 in += AES_BLOCK_SIZE;
521 out += AES_BLOCK_SIZE;
522 len -= AES_BLOCK_SIZE;
523 } else if (len < (SHA_DIGEST_LENGTH + 1))
524 return 0;
525
526 # if defined(STITCHED_DECRYPT_CALL)
527 if (len >= 1024 && ctx->key_len == 32) {
528 /* decrypt last block */
529 memcpy(tail_iv, in + len - 2 * AES_BLOCK_SIZE,
530 AES_BLOCK_SIZE);
531 aesni_cbc_encrypt(in + len - AES_BLOCK_SIZE,
532 out + len - AES_BLOCK_SIZE, AES_BLOCK_SIZE,
533 &key->ks, tail_iv, 0);
534 stitch = 1;
535 } else
536 # endif
537 /* decrypt HMAC|padding at once */
538 aesni_cbc_encrypt(in, out, len, &key->ks,
539 EVP_CIPHER_CTX_iv_noconst(ctx), 0);
540
541 /* figure out payload length */
542 pad = out[len - 1];
543 maxpad = len - (SHA_DIGEST_LENGTH + 1);
544 maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
545 maxpad &= 255;
546
547 ret &= constant_time_ge(maxpad, pad);
548
549 inp_len = len - (SHA_DIGEST_LENGTH + pad + 1);
550 mask = (0 - ((inp_len - len) >> (sizeof(inp_len) * 8 - 1)));
551 inp_len &= mask;
552 ret &= (int)mask;
553
554 key->aux.tls_aad[plen - 2] = inp_len >> 8;
555 key->aux.tls_aad[plen - 1] = inp_len;
556
557 /* calculate HMAC */
558 key->md = key->head;
559 SHA1_Update(&key->md, key->aux.tls_aad, plen);
560
561 # if defined(STITCHED_DECRYPT_CALL)
562 if (stitch) {
563 blocks = (len - (256 + 32 + SHA_CBLOCK)) / SHA_CBLOCK;
564 aes_off = len - AES_BLOCK_SIZE - blocks * SHA_CBLOCK;
565 sha_off = SHA_CBLOCK - plen;
566
567 aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
568
569 SHA1_Update(&key->md, out, sha_off);
570 aesni256_cbc_sha1_dec(in + aes_off,
571 out + aes_off, blocks, &key->ks,
572 ctx->iv, &key->md, out + sha_off);
573
574 sha_off += blocks *= SHA_CBLOCK;
575 out += sha_off;
576 len -= sha_off;
577 inp_len -= sha_off;
578
579 key->md.Nl += (blocks << 3); /* at most 18 bits */
580 memcpy(ctx->iv, tail_iv, AES_BLOCK_SIZE);
581 }
582 # endif
583
584 # if 1
585 len -= SHA_DIGEST_LENGTH; /* amend mac */
586 if (len >= (256 + SHA_CBLOCK)) {
587 j = (len - (256 + SHA_CBLOCK)) & (0 - SHA_CBLOCK);
588 j += SHA_CBLOCK - key->md.num;
589 SHA1_Update(&key->md, out, j);
590 out += j;
591 len -= j;
592 inp_len -= j;
593 }
594
595 /* but pretend as if we hashed padded payload */
596 bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
597 # ifdef BSWAP4
598 bitlen = BSWAP4(bitlen);
599 # else
600 mac.c[0] = 0;
601 mac.c[1] = (unsigned char)(bitlen >> 16);
602 mac.c[2] = (unsigned char)(bitlen >> 8);
603 mac.c[3] = (unsigned char)bitlen;
604 bitlen = mac.u[0];
605 # endif
606
607 pmac->u[0] = 0;
608 pmac->u[1] = 0;
609 pmac->u[2] = 0;
610 pmac->u[3] = 0;
611 pmac->u[4] = 0;
612
613 for (res = key->md.num, j = 0; j < len; j++) {
614 size_t c = out[j];
615 mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
616 c &= mask;
617 c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
618 data->c[res++] = (unsigned char)c;
619
620 if (res != SHA_CBLOCK)
621 continue;
622
623 /* j is not incremented yet */
624 mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
625 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
626 sha1_block_data_order(&key->md, data, 1);
627 mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
628 pmac->u[0] |= key->md.h0 & mask;
629 pmac->u[1] |= key->md.h1 & mask;
630 pmac->u[2] |= key->md.h2 & mask;
631 pmac->u[3] |= key->md.h3 & mask;
632 pmac->u[4] |= key->md.h4 & mask;
633 res = 0;
634 }
635
636 for (i = res; i < SHA_CBLOCK; i++, j++)
637 data->c[i] = 0;
638
639 if (res > SHA_CBLOCK - 8) {
640 mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
641 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
642 sha1_block_data_order(&key->md, data, 1);
643 mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
644 pmac->u[0] |= key->md.h0 & mask;
645 pmac->u[1] |= key->md.h1 & mask;
646 pmac->u[2] |= key->md.h2 & mask;
647 pmac->u[3] |= key->md.h3 & mask;
648 pmac->u[4] |= key->md.h4 & mask;
649
650 memset(data, 0, SHA_CBLOCK);
651 j += 64;
652 }
653 data->u[SHA_LBLOCK - 1] = bitlen;
654 sha1_block_data_order(&key->md, data, 1);
655 mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
656 pmac->u[0] |= key->md.h0 & mask;
657 pmac->u[1] |= key->md.h1 & mask;
658 pmac->u[2] |= key->md.h2 & mask;
659 pmac->u[3] |= key->md.h3 & mask;
660 pmac->u[4] |= key->md.h4 & 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 # else
669 for (i = 0; i < 5; i++) {
670 res = pmac->u[i];
671 pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
672 pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
673 pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
674 pmac->c[4 * i + 3] = (unsigned char)res;
675 }
676 # endif
677 len += SHA_DIGEST_LENGTH;
678 # else
679 SHA1_Update(&key->md, out, inp_len);
680 res = key->md.num;
681 SHA1_Final(pmac->c, &key->md);
682
683 {
684 unsigned int inp_blocks, pad_blocks;
685
686 /* but pretend as if we hashed padded payload */
687 inp_blocks =
688 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
689 res += (unsigned int)(len - inp_len);
690 pad_blocks = res / SHA_CBLOCK;
691 res %= SHA_CBLOCK;
692 pad_blocks +=
693 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
694 for (; inp_blocks < pad_blocks; inp_blocks++)
695 sha1_block_data_order(&key->md, data, 1);
696 }
697 # endif
698 key->md = key->tail;
699 SHA1_Update(&key->md, pmac->c, SHA_DIGEST_LENGTH);
700 SHA1_Final(pmac->c, &key->md);
701
702 /* verify HMAC */
703 out += inp_len;
704 len -= inp_len;
705 # if 1
706 {
707 unsigned char *p = out + len - 1 - maxpad - SHA_DIGEST_LENGTH;
708 size_t off = out - p;
709 unsigned int c, cmask;
710
711 maxpad += SHA_DIGEST_LENGTH;
712 for (res = 0, i = 0, j = 0; j < maxpad; j++) {
713 c = p[j];
714 cmask =
715 ((int)(j - off - SHA_DIGEST_LENGTH)) >> (sizeof(int) *
716 8 - 1);
717 res |= (c ^ pad) & ~cmask; /* ... and padding */
718 cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
719 res |= (c ^ pmac->c[i]) & cmask;
720 i += 1 & cmask;
721 }
722 maxpad -= SHA_DIGEST_LENGTH;
723
724 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
725 ret &= (int)~res;
726 }
727 # else
728 for (res = 0, i = 0; i < SHA_DIGEST_LENGTH; i++)
729 res |= out[i] ^ pmac->c[i];
730 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
731 ret &= (int)~res;
732
733 /* verify padding */
734 pad = (pad & ~res) | (maxpad & res);
735 out = out + len - 1 - pad;
736 for (res = 0, i = 0; i < pad; i++)
737 res |= out[i] ^ pad;
738
739 res = (0 - res) >> (sizeof(res) * 8 - 1);
740 ret &= (int)~res;
741 # endif
742 return ret;
743 } else {
744 # if defined(STITCHED_DECRYPT_CALL)
745 if (len >= 1024 && ctx->key_len == 32) {
746 if (sha_off %= SHA_CBLOCK)
747 blocks = (len - 3 * SHA_CBLOCK) / SHA_CBLOCK;
748 else
749 blocks = (len - 2 * SHA_CBLOCK) / SHA_CBLOCK;
750 aes_off = len - blocks * SHA_CBLOCK;
751
752 aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
753 SHA1_Update(&key->md, out, sha_off);
754 aesni256_cbc_sha1_dec(in + aes_off,
755 out + aes_off, blocks, &key->ks,
756 ctx->iv, &key->md, out + sha_off);
757
758 sha_off += blocks *= SHA_CBLOCK;
759 out += sha_off;
760 len -= sha_off;
761
762 key->md.Nh += blocks >> 29;
763 key->md.Nl += blocks <<= 3;
764 if (key->md.Nl < (unsigned int)blocks)
765 key->md.Nh++;
766 } else
767 # endif
768 /* decrypt HMAC|padding at once */
769 aesni_cbc_encrypt(in, out, len, &key->ks,
770 EVP_CIPHER_CTX_iv_noconst(ctx), 0);
771
772 SHA1_Update(&key->md, out, len);
773 }
774 }
775
776 return 1;
777 }
778
779 static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
780 void *ptr)
781 {
782 EVP_AES_HMAC_SHA1 *key = data(ctx);
783
784 switch (type) {
785 case EVP_CTRL_AEAD_SET_MAC_KEY:
786 {
787 unsigned int i;
788 unsigned char hmac_key[64];
789
790 memset(hmac_key, 0, sizeof(hmac_key));
791
792 if (arg > (int)sizeof(hmac_key)) {
793 SHA1_Init(&key->head);
794 SHA1_Update(&key->head, ptr, arg);
795 SHA1_Final(hmac_key, &key->head);
796 } else {
797 memcpy(hmac_key, ptr, arg);
798 }
799
800 for (i = 0; i < sizeof(hmac_key); i++)
801 hmac_key[i] ^= 0x36; /* ipad */
802 SHA1_Init(&key->head);
803 SHA1_Update(&key->head, hmac_key, sizeof(hmac_key));
804
805 for (i = 0; i < sizeof(hmac_key); i++)
806 hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
807 SHA1_Init(&key->tail);
808 SHA1_Update(&key->tail, hmac_key, sizeof(hmac_key));
809
810 OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
811
812 return 1;
813 }
814 case EVP_CTRL_AEAD_TLS1_AAD:
815 {
816 unsigned char *p = ptr;
817 unsigned int len;
818
819 if (arg != EVP_AEAD_TLS1_AAD_LEN)
820 return -1;
821
822 len = p[arg - 2] << 8 | p[arg - 1];
823
824 if (EVP_CIPHER_CTX_encrypting(ctx)) {
825 key->payload_length = len;
826 if ((key->aux.tls_ver =
827 p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
828 len -= AES_BLOCK_SIZE;
829 p[arg - 2] = len >> 8;
830 p[arg - 1] = len;
831 }
832 key->md = key->head;
833 SHA1_Update(&key->md, p, arg);
834
835 return (int)(((len + SHA_DIGEST_LENGTH +
836 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
837 - len);
838 } else {
839 memcpy(key->aux.tls_aad, ptr, arg);
840 key->payload_length = arg;
841
842 return SHA_DIGEST_LENGTH;
843 }
844 }
845 # if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
846 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
847 return (int)(5 + 16 + ((arg + 20 + 16) & -16));
848 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
849 {
850 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
851 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
852 unsigned int n4x = 1, x4;
853 unsigned int frag, last, packlen, inp_len;
854
855 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
856 return -1;
857
858 inp_len = param->inp[11] << 8 | param->inp[12];
859
860 if (EVP_CIPHER_CTX_encrypting(ctx)) {
861 if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
862 return -1;
863
864 if (inp_len) {
865 if (inp_len < 4096)
866 return 0; /* too short */
867
868 if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
869 n4x = 2; /* AVX2 */
870 } else if ((n4x = param->interleave / 4) && n4x <= 2)
871 inp_len = param->len;
872 else
873 return -1;
874
875 key->md = key->head;
876 SHA1_Update(&key->md, param->inp, 13);
877
878 x4 = 4 * n4x;
879 n4x += 1;
880
881 frag = inp_len >> n4x;
882 last = inp_len + frag - (frag << n4x);
883 if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
884 frag++;
885 last -= x4 - 1;
886 }
887
888 packlen = 5 + 16 + ((frag + 20 + 16) & -16);
889 packlen = (packlen << n4x) - packlen;
890 packlen += 5 + 16 + ((last + 20 + 16) & -16);
891
892 param->interleave = x4;
893
894 return (int)packlen;
895 } else
896 return -1; /* not yet */
897 }
898 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
899 {
900 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
901 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
902
903 return (int)tls1_1_multi_block_encrypt(key, param->out,
904 param->inp, param->len,
905 param->interleave / 4);
906 }
907 case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
908 # endif
909 default:
910 return -1;
911 }
912 }
913
914 static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher = {
915 # ifdef NID_aes_128_cbc_hmac_sha1
916 NID_aes_128_cbc_hmac_sha1,
917 # else
918 NID_undef,
919 # endif
920 AES_BLOCK_SIZE, 16, 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_sha1_init_key,
924 aesni_cbc_hmac_sha1_cipher,
925 NULL,
926 sizeof(EVP_AES_HMAC_SHA1),
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_sha1_ctrl,
930 NULL
931 };
932
933 static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher = {
934 # ifdef NID_aes_256_cbc_hmac_sha1
935 NID_aes_256_cbc_hmac_sha1,
936 # else
937 NID_undef,
938 # endif
939 AES_BLOCK_SIZE, 32, AES_BLOCK_SIZE,
940 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
941 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
942 aesni_cbc_hmac_sha1_init_key,
943 aesni_cbc_hmac_sha1_cipher,
944 NULL,
945 sizeof(EVP_AES_HMAC_SHA1),
946 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
947 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
948 aesni_cbc_hmac_sha1_ctrl,
949 NULL
950 };
951
952 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
953 {
954 return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
955 &aesni_128_cbc_hmac_sha1_cipher : NULL);
956 }
957
958 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
959 {
960 return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
961 &aesni_256_cbc_hmac_sha1_cipher : NULL);
962 }
963 #else
964 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
965 {
966 return NULL;
967 }
968
969 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
970 {
971 return NULL;
972 }
973 #endif
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