1 /*
2 * Copyright 2011-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 /*
11 * AES low level APIs are deprecated for public use, but still ok for internal
12 * use where we're using them to implement the higher level EVP interface, as is
13 * the case here.
14 */
15 #include "internal/deprecated.h"
16
17 #include <stdio.h>
18 #include <string.h>
19 #include <openssl/opensslconf.h>
20 #include <openssl/evp.h>
21 #include <openssl/objects.h>
22 #include <openssl/aes.h>
23 #include <openssl/sha.h>
24 #include <openssl/rand.h>
25 #include "internal/cryptlib.h"
26 #include "crypto/modes.h"
27 #include "crypto/evp.h"
28 #include "internal/constant_time.h"
29 #include "evp_local.h"
30
31 typedef struct {
32 AES_KEY ks;
33 SHA_CTX head, tail, md;
34 size_t payload_length; /* AAD length in decrypt case */
35 union {
36 unsigned int tls_ver;
37 unsigned char tls_aad[16]; /* 13 used */
38 } aux;
39 } EVP_AES_HMAC_SHA1;
40
41 #define NO_PAYLOAD_LENGTH ((size_t)-1)
42
43 #if defined(AES_ASM) && ( \
44 defined(__x86_64) || defined(__x86_64__) || \
45 defined(_M_AMD64) || defined(_M_X64) )
46
47 # define AESNI_CAPABLE (1<<(57-32))
48
49 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
50 AES_KEY *key);
51 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
52 AES_KEY *key);
53
54 void aesni_cbc_encrypt(const unsigned char *in,
55 unsigned char *out,
56 size_t length,
57 const AES_KEY *key, unsigned char *ivec, int enc);
58
59 void aesni_cbc_sha1_enc(const void *inp, void *out, size_t blocks,
60 const AES_KEY *key, unsigned char iv[16],
61 SHA_CTX *ctx, const void *in0);
62
63 void aesni256_cbc_sha1_dec(const void *inp, void *out, size_t blocks,
64 const AES_KEY *key, unsigned char iv[16],
65 SHA_CTX *ctx, const void *in0);
66
67 # define data(ctx) ((EVP_AES_HMAC_SHA1 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
68
aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * inkey,const unsigned char * iv,int enc)69 static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
70 const unsigned char *inkey,
71 const unsigned char *iv, int enc)
72 {
73 EVP_AES_HMAC_SHA1 *key = data(ctx);
74 int ret;
75 const int keylen = EVP_CIPHER_CTX_get_key_length(ctx) * 8;
76
77 if (keylen <= 0) {
78 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
79 return 0;
80 }
81 if (enc)
82 ret = aesni_set_encrypt_key(inkey, keylen, &key->ks);
83 else
84 ret = aesni_set_decrypt_key(inkey, keylen, &key->ks);
85
86 SHA1_Init(&key->head); /* handy when benchmarking */
87 key->tail = key->head;
88 key->md = key->head;
89
90 key->payload_length = NO_PAYLOAD_LENGTH;
91
92 return ret < 0 ? 0 : 1;
93 }
94
95 # define STITCHED_CALL
96 # undef STITCHED_DECRYPT_CALL
97
98 # if !defined(STITCHED_CALL)
99 # define aes_off 0
100 # endif
101
102 void sha1_block_data_order(void *c, const void *p, size_t len);
103
sha1_update(SHA_CTX * c,const void * data,size_t len)104 static void sha1_update(SHA_CTX *c, const void *data, size_t len)
105 {
106 const unsigned char *ptr = data;
107 size_t res;
108
109 if ((res = c->num)) {
110 res = SHA_CBLOCK - res;
111 if (len < res)
112 res = len;
113 SHA1_Update(c, ptr, res);
114 ptr += res;
115 len -= res;
116 }
117
118 res = len % SHA_CBLOCK;
119 len -= res;
120
121 if (len) {
122 sha1_block_data_order(c, ptr, len / SHA_CBLOCK);
123
124 ptr += len;
125 c->Nh += len >> 29;
126 c->Nl += len <<= 3;
127 if (c->Nl < (unsigned int)len)
128 c->Nh++;
129 }
130
131 if (res)
132 SHA1_Update(c, ptr, res);
133 }
134
135 # ifdef SHA1_Update
136 # undef SHA1_Update
137 # endif
138 # define SHA1_Update sha1_update
139
140 # if !defined(OPENSSL_NO_MULTIBLOCK)
141
142 typedef struct {
143 unsigned int A[8], B[8], C[8], D[8], E[8];
144 } SHA1_MB_CTX;
145 typedef struct {
146 const unsigned char *ptr;
147 int blocks;
148 } HASH_DESC;
149
150 void sha1_multi_block(SHA1_MB_CTX *, const HASH_DESC *, int);
151
152 typedef struct {
153 const unsigned char *inp;
154 unsigned char *out;
155 int blocks;
156 u64 iv[2];
157 } CIPH_DESC;
158
159 void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
160
tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA1 * key,unsigned char * out,const unsigned char * inp,size_t inp_len,int n4x)161 static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA1 *key,
162 unsigned char *out,
163 const unsigned char *inp,
164 size_t inp_len, int n4x)
165 { /* n4x is 1 or 2 */
166 HASH_DESC hash_d[8], edges[8];
167 CIPH_DESC ciph_d[8];
168 unsigned char storage[sizeof(SHA1_MB_CTX) + 32];
169 union {
170 u64 q[16];
171 u32 d[32];
172 u8 c[128];
173 } blocks[8];
174 SHA1_MB_CTX *ctx;
175 unsigned int frag, last, packlen, i, x4 = 4 * n4x, minblocks, processed =
176 0;
177 size_t ret = 0;
178 u8 *IVs;
179 # if defined(BSWAP8)
180 u64 seqnum;
181 # endif
182
183 /* ask for IVs in bulk */
184 if (RAND_bytes((IVs = blocks[0].c), 16 * x4) <= 0)
185 return 0;
186
187 ctx = (SHA1_MB_CTX *) (storage + 32 - ((size_t)storage % 32)); /* align */
188
189 frag = (unsigned int)inp_len >> (1 + n4x);
190 last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
191 if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
192 frag++;
193 last -= x4 - 1;
194 }
195
196 packlen = 5 + 16 + ((frag + 20 + 16) & -16);
197
198 /* populate descriptors with pointers and IVs */
199 hash_d[0].ptr = inp;
200 ciph_d[0].inp = inp;
201 /* 5+16 is place for header and explicit IV */
202 ciph_d[0].out = out + 5 + 16;
203 memcpy(ciph_d[0].out - 16, IVs, 16);
204 memcpy(ciph_d[0].iv, IVs, 16);
205 IVs += 16;
206
207 for (i = 1; i < x4; i++) {
208 ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
209 ciph_d[i].out = ciph_d[i - 1].out + packlen;
210 memcpy(ciph_d[i].out - 16, IVs, 16);
211 memcpy(ciph_d[i].iv, IVs, 16);
212 IVs += 16;
213 }
214
215 # if defined(BSWAP8)
216 memcpy(blocks[0].c, key->md.data, 8);
217 seqnum = BSWAP8(blocks[0].q[0]);
218 # endif
219 for (i = 0; i < x4; i++) {
220 unsigned int len = (i == (x4 - 1) ? last : frag);
221 # if !defined(BSWAP8)
222 unsigned int carry, j;
223 # endif
224
225 ctx->A[i] = key->md.h0;
226 ctx->B[i] = key->md.h1;
227 ctx->C[i] = key->md.h2;
228 ctx->D[i] = key->md.h3;
229 ctx->E[i] = key->md.h4;
230
231 /* fix seqnum */
232 # if defined(BSWAP8)
233 blocks[i].q[0] = BSWAP8(seqnum + i);
234 # else
235 for (carry = i, j = 8; j--;) {
236 blocks[i].c[j] = ((u8 *)key->md.data)[j] + carry;
237 carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1);
238 }
239 # endif
240 blocks[i].c[8] = ((u8 *)key->md.data)[8];
241 blocks[i].c[9] = ((u8 *)key->md.data)[9];
242 blocks[i].c[10] = ((u8 *)key->md.data)[10];
243 /* fix length */
244 blocks[i].c[11] = (u8)(len >> 8);
245 blocks[i].c[12] = (u8)(len);
246
247 memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13);
248 hash_d[i].ptr += 64 - 13;
249 hash_d[i].blocks = (len - (64 - 13)) / 64;
250
251 edges[i].ptr = blocks[i].c;
252 edges[i].blocks = 1;
253 }
254
255 /* hash 13-byte headers and first 64-13 bytes of inputs */
256 sha1_multi_block(ctx, edges, n4x);
257 /* hash bulk inputs */
258 # define MAXCHUNKSIZE 2048
259 # if MAXCHUNKSIZE%64
260 # error "MAXCHUNKSIZE is not divisible by 64"
261 # elif MAXCHUNKSIZE
262 /*
263 * goal is to minimize pressure on L1 cache by moving in shorter steps,
264 * so that hashed data is still in the cache by the time we encrypt it
265 */
266 minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64;
267 if (minblocks > MAXCHUNKSIZE / 64) {
268 for (i = 0; i < x4; i++) {
269 edges[i].ptr = hash_d[i].ptr;
270 edges[i].blocks = MAXCHUNKSIZE / 64;
271 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
272 }
273 do {
274 sha1_multi_block(ctx, edges, n4x);
275 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
276
277 for (i = 0; i < x4; i++) {
278 edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE;
279 hash_d[i].blocks -= MAXCHUNKSIZE / 64;
280 edges[i].blocks = MAXCHUNKSIZE / 64;
281 ciph_d[i].inp += MAXCHUNKSIZE;
282 ciph_d[i].out += MAXCHUNKSIZE;
283 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
284 memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16);
285 }
286 processed += MAXCHUNKSIZE;
287 minblocks -= MAXCHUNKSIZE / 64;
288 } while (minblocks > MAXCHUNKSIZE / 64);
289 }
290 # endif
291 # undef MAXCHUNKSIZE
292 sha1_multi_block(ctx, hash_d, n4x);
293
294 memset(blocks, 0, sizeof(blocks));
295 for (i = 0; i < x4; i++) {
296 unsigned int len = (i == (x4 - 1) ? last : frag),
297 off = hash_d[i].blocks * 64;
298 const unsigned char *ptr = hash_d[i].ptr + off;
299
300 off = (len - processed) - (64 - 13) - off; /* remainder actually */
301 memcpy(blocks[i].c, ptr, off);
302 blocks[i].c[off] = 0x80;
303 len += 64 + 13; /* 64 is HMAC header */
304 len *= 8; /* convert to bits */
305 if (off < (64 - 8)) {
306 # ifdef BSWAP4
307 blocks[i].d[15] = BSWAP4(len);
308 # else
309 PUTU32(blocks[i].c + 60, len);
310 # endif
311 edges[i].blocks = 1;
312 } else {
313 # ifdef BSWAP4
314 blocks[i].d[31] = BSWAP4(len);
315 # else
316 PUTU32(blocks[i].c + 124, len);
317 # endif
318 edges[i].blocks = 2;
319 }
320 edges[i].ptr = blocks[i].c;
321 }
322
323 /* hash input tails and finalize */
324 sha1_multi_block(ctx, edges, n4x);
325
326 memset(blocks, 0, sizeof(blocks));
327 for (i = 0; i < x4; i++) {
328 # ifdef BSWAP4
329 blocks[i].d[0] = BSWAP4(ctx->A[i]);
330 ctx->A[i] = key->tail.h0;
331 blocks[i].d[1] = BSWAP4(ctx->B[i]);
332 ctx->B[i] = key->tail.h1;
333 blocks[i].d[2] = BSWAP4(ctx->C[i]);
334 ctx->C[i] = key->tail.h2;
335 blocks[i].d[3] = BSWAP4(ctx->D[i]);
336 ctx->D[i] = key->tail.h3;
337 blocks[i].d[4] = BSWAP4(ctx->E[i]);
338 ctx->E[i] = key->tail.h4;
339 blocks[i].c[20] = 0x80;
340 blocks[i].d[15] = BSWAP4((64 + 20) * 8);
341 # else
342 PUTU32(blocks[i].c + 0, ctx->A[i]);
343 ctx->A[i] = key->tail.h0;
344 PUTU32(blocks[i].c + 4, ctx->B[i]);
345 ctx->B[i] = key->tail.h1;
346 PUTU32(blocks[i].c + 8, ctx->C[i]);
347 ctx->C[i] = key->tail.h2;
348 PUTU32(blocks[i].c + 12, ctx->D[i]);
349 ctx->D[i] = key->tail.h3;
350 PUTU32(blocks[i].c + 16, ctx->E[i]);
351 ctx->E[i] = key->tail.h4;
352 blocks[i].c[20] = 0x80;
353 PUTU32(blocks[i].c + 60, (64 + 20) * 8);
354 # endif
355 edges[i].ptr = blocks[i].c;
356 edges[i].blocks = 1;
357 }
358
359 /* finalize MACs */
360 sha1_multi_block(ctx, edges, n4x);
361
362 for (i = 0; i < x4; i++) {
363 unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
364 unsigned char *out0 = out;
365
366 memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
367 ciph_d[i].inp = ciph_d[i].out;
368
369 out += 5 + 16 + len;
370
371 /* write MAC */
372 PUTU32(out + 0, ctx->A[i]);
373 PUTU32(out + 4, ctx->B[i]);
374 PUTU32(out + 8, ctx->C[i]);
375 PUTU32(out + 12, ctx->D[i]);
376 PUTU32(out + 16, ctx->E[i]);
377 out += 20;
378 len += 20;
379
380 /* pad */
381 pad = 15 - len % 16;
382 for (j = 0; j <= pad; j++)
383 *(out++) = pad;
384 len += pad + 1;
385
386 ciph_d[i].blocks = (len - processed) / 16;
387 len += 16; /* account for explicit iv */
388
389 /* arrange header */
390 out0[0] = ((u8 *)key->md.data)[8];
391 out0[1] = ((u8 *)key->md.data)[9];
392 out0[2] = ((u8 *)key->md.data)[10];
393 out0[3] = (u8)(len >> 8);
394 out0[4] = (u8)(len);
395
396 ret += len + 5;
397 inp += frag;
398 }
399
400 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
401
402 OPENSSL_cleanse(blocks, sizeof(blocks));
403 OPENSSL_cleanse(ctx, sizeof(*ctx));
404
405 return ret;
406 }
407 # endif
408
aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)409 static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
410 const unsigned char *in, size_t len)
411 {
412 EVP_AES_HMAC_SHA1 *key = data(ctx);
413 unsigned int l;
414 size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
415 * later */
416 sha_off = 0;
417 # if defined(STITCHED_CALL)
418 size_t aes_off = 0, blocks;
419
420 sha_off = SHA_CBLOCK - key->md.num;
421 # endif
422
423 key->payload_length = NO_PAYLOAD_LENGTH;
424
425 if (len % AES_BLOCK_SIZE)
426 return 0;
427
428 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
429 if (plen == NO_PAYLOAD_LENGTH)
430 plen = len;
431 else if (len !=
432 ((plen + SHA_DIGEST_LENGTH +
433 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
434 return 0;
435 else if (key->aux.tls_ver >= TLS1_1_VERSION)
436 iv = AES_BLOCK_SIZE;
437
438 # if defined(STITCHED_CALL)
439 if (plen > (sha_off + iv)
440 && (blocks = (plen - (sha_off + iv)) / SHA_CBLOCK)) {
441 SHA1_Update(&key->md, in + iv, sha_off);
442
443 aesni_cbc_sha1_enc(in, out, blocks, &key->ks, ctx->iv,
444 &key->md, in + iv + sha_off);
445 blocks *= SHA_CBLOCK;
446 aes_off += blocks;
447 sha_off += blocks;
448 key->md.Nh += blocks >> 29;
449 key->md.Nl += blocks <<= 3;
450 if (key->md.Nl < (unsigned int)blocks)
451 key->md.Nh++;
452 } else {
453 sha_off = 0;
454 }
455 # endif
456 sha_off += iv;
457 SHA1_Update(&key->md, in + sha_off, plen - sha_off);
458
459 if (plen != len) { /* "TLS" mode of operation */
460 if (in != out)
461 memcpy(out + aes_off, in + aes_off, plen - aes_off);
462
463 /* calculate HMAC and append it to payload */
464 SHA1_Final(out + plen, &key->md);
465 key->md = key->tail;
466 SHA1_Update(&key->md, out + plen, SHA_DIGEST_LENGTH);
467 SHA1_Final(out + plen, &key->md);
468
469 /* pad the payload|hmac */
470 plen += SHA_DIGEST_LENGTH;
471 for (l = len - plen - 1; plen < len; plen++)
472 out[plen] = l;
473 /* encrypt HMAC|padding at once */
474 aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
475 &key->ks, ctx->iv, 1);
476 } else {
477 aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
478 &key->ks, ctx->iv, 1);
479 }
480 } else {
481 union {
482 unsigned int u[SHA_DIGEST_LENGTH / sizeof(unsigned int)];
483 unsigned char c[32 + SHA_DIGEST_LENGTH];
484 } mac, *pmac;
485
486 /* arrange cache line alignment */
487 pmac = (void *)(((size_t)mac.c + 31) & ((size_t)0 - 32));
488
489 if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
490 size_t inp_len, mask, j, i;
491 unsigned int res, maxpad, pad, bitlen;
492 int ret = 1;
493 union {
494 unsigned int u[SHA_LBLOCK];
495 unsigned char c[SHA_CBLOCK];
496 } *data = (void *)key->md.data;
497 # if defined(STITCHED_DECRYPT_CALL)
498 unsigned char tail_iv[AES_BLOCK_SIZE];
499 int stitch = 0;
500 const int keylen = EVP_CIPHER_CTX_get_key_length(ctx);
501
502 if (keylen <= 0) {
503 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
504 return 0;
505 }
506 # endif
507
508 if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
509 >= TLS1_1_VERSION) {
510 if (len < (AES_BLOCK_SIZE + SHA_DIGEST_LENGTH + 1))
511 return 0;
512
513 /* omit explicit iv */
514 memcpy(ctx->iv, in, AES_BLOCK_SIZE);
515
516 in += AES_BLOCK_SIZE;
517 out += AES_BLOCK_SIZE;
518 len -= AES_BLOCK_SIZE;
519 } else if (len < (SHA_DIGEST_LENGTH + 1))
520 return 0;
521
522 # if defined(STITCHED_DECRYPT_CALL)
523 if (len >= 1024 && keylen == 32) {
524 /* decrypt last block */
525 memcpy(tail_iv, in + len - 2 * AES_BLOCK_SIZE,
526 AES_BLOCK_SIZE);
527 aesni_cbc_encrypt(in + len - AES_BLOCK_SIZE,
528 out + len - AES_BLOCK_SIZE, AES_BLOCK_SIZE,
529 &key->ks, tail_iv, 0);
530 stitch = 1;
531 } else
532 # endif
533 /* decrypt HMAC|padding at once */
534 aesni_cbc_encrypt(in, out, len, &key->ks,
535 ctx->iv, 0);
536
537 /* figure out payload length */
538 pad = out[len - 1];
539 maxpad = len - (SHA_DIGEST_LENGTH + 1);
540 maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
541 maxpad &= 255;
542
543 mask = constant_time_ge(maxpad, pad);
544 ret &= mask;
545 /*
546 * If pad is invalid then we will fail the above test but we must
547 * continue anyway because we are in constant time code. However,
548 * we'll use the maxpad value instead of the supplied pad to make
549 * sure we perform well defined pointer arithmetic.
550 */
551 pad = constant_time_select(mask, pad, maxpad);
552
553 inp_len = len - (SHA_DIGEST_LENGTH + pad + 1);
554
555 key->aux.tls_aad[plen - 2] = inp_len >> 8;
556 key->aux.tls_aad[plen - 1] = inp_len;
557
558 /* calculate HMAC */
559 key->md = key->head;
560 SHA1_Update(&key->md, key->aux.tls_aad, plen);
561
562 # if defined(STITCHED_DECRYPT_CALL)
563 if (stitch) {
564 blocks = (len - (256 + 32 + SHA_CBLOCK)) / SHA_CBLOCK;
565 aes_off = len - AES_BLOCK_SIZE - blocks * SHA_CBLOCK;
566 sha_off = SHA_CBLOCK - plen;
567
568 aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
569
570 SHA1_Update(&key->md, out, sha_off);
571 aesni256_cbc_sha1_dec(in + aes_off,
572 out + aes_off, blocks, &key->ks,
573 ctx->iv, &key->md, out + sha_off);
574
575 sha_off += blocks *= SHA_CBLOCK;
576 out += sha_off;
577 len -= sha_off;
578 inp_len -= sha_off;
579
580 key->md.Nl += (blocks << 3); /* at most 18 bits */
581 memcpy(ctx->iv, tail_iv, AES_BLOCK_SIZE);
582 }
583 # endif
584
585 # if 1 /* see original reference version in #else */
586 len -= SHA_DIGEST_LENGTH; /* amend mac */
587 if (len >= (256 + SHA_CBLOCK)) {
588 j = (len - (256 + SHA_CBLOCK)) & (0 - SHA_CBLOCK);
589 j += SHA_CBLOCK - key->md.num;
590 SHA1_Update(&key->md, out, j);
591 out += j;
592 len -= j;
593 inp_len -= j;
594 }
595
596 /* but pretend as if we hashed padded payload */
597 bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
598 # ifdef BSWAP4
599 bitlen = BSWAP4(bitlen);
600 # else
601 mac.c[0] = 0;
602 mac.c[1] = (unsigned char)(bitlen >> 16);
603 mac.c[2] = (unsigned char)(bitlen >> 8);
604 mac.c[3] = (unsigned char)bitlen;
605 bitlen = mac.u[0];
606 # endif
607
608 pmac->u[0] = 0;
609 pmac->u[1] = 0;
610 pmac->u[2] = 0;
611 pmac->u[3] = 0;
612 pmac->u[4] = 0;
613
614 for (res = key->md.num, j = 0; j < len; j++) {
615 size_t c = out[j];
616 mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
617 c &= mask;
618 c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
619 data->c[res++] = (unsigned char)c;
620
621 if (res != SHA_CBLOCK)
622 continue;
623
624 /* j is not incremented yet */
625 mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
626 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
627 sha1_block_data_order(&key->md, data, 1);
628 mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
629 pmac->u[0] |= key->md.h0 & mask;
630 pmac->u[1] |= key->md.h1 & mask;
631 pmac->u[2] |= key->md.h2 & mask;
632 pmac->u[3] |= key->md.h3 & mask;
633 pmac->u[4] |= key->md.h4 & mask;
634 res = 0;
635 }
636
637 for (i = res; i < SHA_CBLOCK; i++, j++)
638 data->c[i] = 0;
639
640 if (res > SHA_CBLOCK - 8) {
641 mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
642 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
643 sha1_block_data_order(&key->md, data, 1);
644 mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
645 pmac->u[0] |= key->md.h0 & mask;
646 pmac->u[1] |= key->md.h1 & mask;
647 pmac->u[2] |= key->md.h2 & mask;
648 pmac->u[3] |= key->md.h3 & mask;
649 pmac->u[4] |= key->md.h4 & mask;
650
651 memset(data, 0, SHA_CBLOCK);
652 j += 64;
653 }
654 data->u[SHA_LBLOCK - 1] = bitlen;
655 sha1_block_data_order(&key->md, data, 1);
656 mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
657 pmac->u[0] |= key->md.h0 & mask;
658 pmac->u[1] |= key->md.h1 & mask;
659 pmac->u[2] |= key->md.h2 & mask;
660 pmac->u[3] |= key->md.h3 & mask;
661 pmac->u[4] |= key->md.h4 & mask;
662
663 # ifdef BSWAP4
664 pmac->u[0] = BSWAP4(pmac->u[0]);
665 pmac->u[1] = BSWAP4(pmac->u[1]);
666 pmac->u[2] = BSWAP4(pmac->u[2]);
667 pmac->u[3] = BSWAP4(pmac->u[3]);
668 pmac->u[4] = BSWAP4(pmac->u[4]);
669 # else
670 for (i = 0; i < 5; i++) {
671 res = pmac->u[i];
672 pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
673 pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
674 pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
675 pmac->c[4 * i + 3] = (unsigned char)res;
676 }
677 # endif
678 len += SHA_DIGEST_LENGTH;
679 # else /* pre-lucky-13 reference version of above */
680 SHA1_Update(&key->md, out, inp_len);
681 res = key->md.num;
682 SHA1_Final(pmac->c, &key->md);
683
684 {
685 unsigned int inp_blocks, pad_blocks;
686
687 /* but pretend as if we hashed padded payload */
688 inp_blocks =
689 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
690 res += (unsigned int)(len - inp_len);
691 pad_blocks = res / SHA_CBLOCK;
692 res %= SHA_CBLOCK;
693 pad_blocks +=
694 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
695 for (; inp_blocks < pad_blocks; inp_blocks++)
696 sha1_block_data_order(&key->md, data, 1);
697 }
698 # endif
699 key->md = key->tail;
700 SHA1_Update(&key->md, pmac->c, SHA_DIGEST_LENGTH);
701 SHA1_Final(pmac->c, &key->md);
702
703 /* verify HMAC */
704 out += inp_len;
705 len -= inp_len;
706 # if 1 /* see original reference version in #else */
707 {
708 unsigned char *p = out + len - 1 - maxpad - SHA_DIGEST_LENGTH;
709 size_t off = out - p;
710 unsigned int c, cmask;
711
712 for (res = 0, i = 0, j = 0; j < maxpad + SHA_DIGEST_LENGTH; 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
723 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
724 ret &= (int)~res;
725 }
726 # else /* pre-lucky-13 reference version of above */
727 for (res = 0, i = 0; i < SHA_DIGEST_LENGTH; i++)
728 res |= out[i] ^ pmac->c[i];
729 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
730 ret &= (int)~res;
731
732 /* verify padding */
733 pad = (pad & ~res) | (maxpad & res);
734 out = out + len - 1 - pad;
735 for (res = 0, i = 0; i < pad; i++)
736 res |= out[i] ^ pad;
737
738 res = (0 - res) >> (sizeof(res) * 8 - 1);
739 ret &= (int)~res;
740 # endif
741 return ret;
742 } else {
743 # if defined(STITCHED_DECRYPT_CALL)
744 if (len >= 1024 && keylen == 32) {
745 if (sha_off %= SHA_CBLOCK)
746 blocks = (len - 3 * SHA_CBLOCK) / SHA_CBLOCK;
747 else
748 blocks = (len - 2 * SHA_CBLOCK) / SHA_CBLOCK;
749 aes_off = len - blocks * SHA_CBLOCK;
750
751 aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
752 SHA1_Update(&key->md, out, sha_off);
753 aesni256_cbc_sha1_dec(in + aes_off,
754 out + aes_off, blocks, &key->ks,
755 ctx->iv, &key->md, out + sha_off);
756
757 sha_off += blocks *= SHA_CBLOCK;
758 out += sha_off;
759 len -= sha_off;
760
761 key->md.Nh += blocks >> 29;
762 key->md.Nl += blocks <<= 3;
763 if (key->md.Nl < (unsigned int)blocks)
764 key->md.Nh++;
765 } else
766 # endif
767 /* decrypt HMAC|padding at once */
768 aesni_cbc_encrypt(in, out, len, &key->ks,
769 ctx->iv, 0);
770
771 SHA1_Update(&key->md, out, len);
772 }
773 }
774
775 return 1;
776 }
777
aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)778 static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
779 void *ptr)
780 {
781 EVP_AES_HMAC_SHA1 *key = data(ctx);
782
783 switch (type) {
784 case EVP_CTRL_AEAD_SET_MAC_KEY:
785 {
786 unsigned int i;
787 unsigned char hmac_key[64];
788
789 memset(hmac_key, 0, sizeof(hmac_key));
790
791 if (arg > (int)sizeof(hmac_key)) {
792 SHA1_Init(&key->head);
793 SHA1_Update(&key->head, ptr, arg);
794 SHA1_Final(hmac_key, &key->head);
795 } else {
796 memcpy(hmac_key, ptr, arg);
797 }
798
799 for (i = 0; i < sizeof(hmac_key); i++)
800 hmac_key[i] ^= 0x36; /* ipad */
801 SHA1_Init(&key->head);
802 SHA1_Update(&key->head, hmac_key, sizeof(hmac_key));
803
804 for (i = 0; i < sizeof(hmac_key); i++)
805 hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
806 SHA1_Init(&key->tail);
807 SHA1_Update(&key->tail, hmac_key, sizeof(hmac_key));
808
809 OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
810
811 return 1;
812 }
813 case EVP_CTRL_AEAD_TLS1_AAD:
814 {
815 unsigned char *p = ptr;
816 unsigned int len;
817
818 if (arg != EVP_AEAD_TLS1_AAD_LEN)
819 return -1;
820
821 len = p[arg - 2] << 8 | p[arg - 1];
822
823 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
824 key->payload_length = len;
825 if ((key->aux.tls_ver =
826 p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
827 if (len < AES_BLOCK_SIZE)
828 return 0;
829 len -= AES_BLOCK_SIZE;
830 p[arg - 2] = len >> 8;
831 p[arg - 1] = len;
832 }
833 key->md = key->head;
834 SHA1_Update(&key->md, p, arg);
835
836 return (int)(((len + SHA_DIGEST_LENGTH +
837 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
838 - len);
839 } else {
840 memcpy(key->aux.tls_aad, ptr, arg);
841 key->payload_length = arg;
842
843 return SHA_DIGEST_LENGTH;
844 }
845 }
846 # if !defined(OPENSSL_NO_MULTIBLOCK)
847 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
848 return (int)(5 + 16 + ((arg + 20 + 16) & -16));
849 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
850 {
851 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
852 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
853 unsigned int n4x = 1, x4;
854 unsigned int frag, last, packlen, inp_len;
855
856 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
857 return -1;
858
859 inp_len = param->inp[11] << 8 | param->inp[12];
860
861 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
862 if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
863 return -1;
864
865 if (inp_len) {
866 if (inp_len < 4096)
867 return 0; /* too short */
868
869 if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
870 n4x = 2; /* AVX2 */
871 } else if ((n4x = param->interleave / 4) && n4x <= 2)
872 inp_len = param->len;
873 else
874 return -1;
875
876 key->md = key->head;
877 SHA1_Update(&key->md, param->inp, 13);
878
879 x4 = 4 * n4x;
880 n4x += 1;
881
882 frag = inp_len >> n4x;
883 last = inp_len + frag - (frag << n4x);
884 if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
885 frag++;
886 last -= x4 - 1;
887 }
888
889 packlen = 5 + 16 + ((frag + 20 + 16) & -16);
890 packlen = (packlen << n4x) - packlen;
891 packlen += 5 + 16 + ((last + 20 + 16) & -16);
892
893 param->interleave = x4;
894
895 return (int)packlen;
896 } else
897 return -1; /* not yet */
898 }
899 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
900 {
901 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
902 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
903
904 return (int)tls1_1_multi_block_encrypt(key, param->out,
905 param->inp, param->len,
906 param->interleave / 4);
907 }
908 case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
909 # endif
910 default:
911 return -1;
912 }
913 }
914
915 static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher = {
916 # ifdef NID_aes_128_cbc_hmac_sha1
917 NID_aes_128_cbc_hmac_sha1,
918 # else
919 NID_undef,
920 # endif
921 AES_BLOCK_SIZE, 16, AES_BLOCK_SIZE,
922 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
923 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
924 EVP_ORIG_GLOBAL,
925 aesni_cbc_hmac_sha1_init_key,
926 aesni_cbc_hmac_sha1_cipher,
927 NULL,
928 sizeof(EVP_AES_HMAC_SHA1),
929 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
930 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
931 aesni_cbc_hmac_sha1_ctrl,
932 NULL
933 };
934
935 static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher = {
936 # ifdef NID_aes_256_cbc_hmac_sha1
937 NID_aes_256_cbc_hmac_sha1,
938 # else
939 NID_undef,
940 # endif
941 AES_BLOCK_SIZE, 32, AES_BLOCK_SIZE,
942 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
943 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
944 EVP_ORIG_GLOBAL,
945 aesni_cbc_hmac_sha1_init_key,
946 aesni_cbc_hmac_sha1_cipher,
947 NULL,
948 sizeof(EVP_AES_HMAC_SHA1),
949 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
950 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
951 aesni_cbc_hmac_sha1_ctrl,
952 NULL
953 };
954
EVP_aes_128_cbc_hmac_sha1(void)955 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
956 {
957 return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
958 &aesni_128_cbc_hmac_sha1_cipher : NULL);
959 }
960
EVP_aes_256_cbc_hmac_sha1(void)961 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
962 {
963 return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
964 &aesni_256_cbc_hmac_sha1_cipher : NULL);
965 }
966 #else
EVP_aes_128_cbc_hmac_sha1(void)967 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
968 {
969 return NULL;
970 }
971
EVP_aes_256_cbc_hmac_sha1(void)972 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
973 {
974 return NULL;
975 }
976 #endif
977
