1 /* ====================================================================
2 * Copyright (c) 2001-2011 The OpenSSL Project. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
20 *
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * openssl-core@openssl.org.
25 *
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
29 *
30 * 6. Redistributions of any form whatsoever must retain the following
31 * acknowledgment:
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
34 *
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
48 *
49 */
50
51 #include <openssl/opensslconf.h>
52 #ifndef OPENSSL_NO_AES
53 #include <openssl/evp.h>
54 #include <openssl/err.h>
55 #include <string.h>
56 #include <assert.h>
57 #include <openssl/aes.h>
58 #include "evp_locl.h"
59 #ifndef OPENSSL_FIPS
60 #include "modes_lcl.h"
61 #include <openssl/rand.h>
62
63 typedef struct
64 {
65 AES_KEY ks;
66 block128_f block;
67 union {
68 cbc128_f cbc;
69 ctr128_f ctr;
70 } stream;
71 } EVP_AES_KEY;
72
73 typedef struct
74 {
75 AES_KEY ks; /* AES key schedule to use */
76 int key_set; /* Set if key initialised */
77 int iv_set; /* Set if an iv is set */
78 GCM128_CONTEXT gcm;
79 unsigned char *iv; /* Temporary IV store */
80 int ivlen; /* IV length */
81 int taglen;
82 int iv_gen; /* It is OK to generate IVs */
83 int tls_aad_len; /* TLS AAD length */
84 ctr128_f ctr;
85 } EVP_AES_GCM_CTX;
86
87 typedef struct
88 {
89 AES_KEY ks1, ks2; /* AES key schedules to use */
90 XTS128_CONTEXT xts;
91 void (*stream)(const unsigned char *in,
92 unsigned char *out, size_t length,
93 const AES_KEY *key1, const AES_KEY *key2,
94 const unsigned char iv[16]);
95 } EVP_AES_XTS_CTX;
96
97 typedef struct
98 {
99 AES_KEY ks; /* AES key schedule to use */
100 int key_set; /* Set if key initialised */
101 int iv_set; /* Set if an iv is set */
102 int tag_set; /* Set if tag is valid */
103 int len_set; /* Set if message length set */
104 int L, M; /* L and M parameters from RFC3610 */
105 CCM128_CONTEXT ccm;
106 ccm128_f str;
107 } EVP_AES_CCM_CTX;
108
109 #define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4))
110
111 #ifdef VPAES_ASM
112 int vpaes_set_encrypt_key(const unsigned char *userKey, int bits,
113 AES_KEY *key);
114 int vpaes_set_decrypt_key(const unsigned char *userKey, int bits,
115 AES_KEY *key);
116
117 void vpaes_encrypt(const unsigned char *in, unsigned char *out,
118 const AES_KEY *key);
119 void vpaes_decrypt(const unsigned char *in, unsigned char *out,
120 const AES_KEY *key);
121
122 void vpaes_cbc_encrypt(const unsigned char *in,
123 unsigned char *out,
124 size_t length,
125 const AES_KEY *key,
126 unsigned char *ivec, int enc);
127 #endif
128 #ifdef BSAES_ASM
129 void bsaes_cbc_encrypt(const unsigned char *in, unsigned char *out,
130 size_t length, const AES_KEY *key,
131 unsigned char ivec[16], int enc);
132 void bsaes_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
133 size_t len, const AES_KEY *key,
134 const unsigned char ivec[16]);
135 void bsaes_xts_encrypt(const unsigned char *inp, unsigned char *out,
136 size_t len, const AES_KEY *key1,
137 const AES_KEY *key2, const unsigned char iv[16]);
138 void bsaes_xts_decrypt(const unsigned char *inp, unsigned char *out,
139 size_t len, const AES_KEY *key1,
140 const AES_KEY *key2, const unsigned char iv[16]);
141 #endif
142 #ifdef AES_CTR_ASM
143 void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
144 size_t blocks, const AES_KEY *key,
145 const unsigned char ivec[AES_BLOCK_SIZE]);
146 #endif
147 #ifdef AES_XTS_ASM
148 void AES_xts_encrypt(const char *inp,char *out,size_t len,
149 const AES_KEY *key1, const AES_KEY *key2,
150 const unsigned char iv[16]);
151 void AES_xts_decrypt(const char *inp,char *out,size_t len,
152 const AES_KEY *key1, const AES_KEY *key2,
153 const unsigned char iv[16]);
154 #endif
155
156 #if defined(AES_ASM) && !defined(I386_ONLY) && ( \
157 ((defined(__i386) || defined(__i386__) || \
158 defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
159 defined(__x86_64) || defined(__x86_64__) || \
160 defined(_M_AMD64) || defined(_M_X64) || \
161 defined(__INTEL__) )
162
163 extern unsigned int OPENSSL_ia32cap_P[2];
164
165 #ifdef VPAES_ASM
166 #define VPAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32)))
167 #endif
168 #ifdef BSAES_ASM
169 #define BSAES_CAPABLE VPAES_CAPABLE
170 #endif
171 /*
172 * AES-NI section
173 */
174 #define AESNI_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(57-32)))
175
176 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
177 AES_KEY *key);
178 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
179 AES_KEY *key);
180
181 void aesni_encrypt(const unsigned char *in, unsigned char *out,
182 const AES_KEY *key);
183 void aesni_decrypt(const unsigned char *in, unsigned char *out,
184 const AES_KEY *key);
185
186 void aesni_ecb_encrypt(const unsigned char *in,
187 unsigned char *out,
188 size_t length,
189 const AES_KEY *key,
190 int enc);
191 void aesni_cbc_encrypt(const unsigned char *in,
192 unsigned char *out,
193 size_t length,
194 const AES_KEY *key,
195 unsigned char *ivec, int enc);
196
197 void aesni_ctr32_encrypt_blocks(const unsigned char *in,
198 unsigned char *out,
199 size_t blocks,
200 const void *key,
201 const unsigned char *ivec);
202
203 void aesni_xts_encrypt(const unsigned char *in,
204 unsigned char *out,
205 size_t length,
206 const AES_KEY *key1, const AES_KEY *key2,
207 const unsigned char iv[16]);
208
209 void aesni_xts_decrypt(const unsigned char *in,
210 unsigned char *out,
211 size_t length,
212 const AES_KEY *key1, const AES_KEY *key2,
213 const unsigned char iv[16]);
214
215 void aesni_ccm64_encrypt_blocks (const unsigned char *in,
216 unsigned char *out,
217 size_t blocks,
218 const void *key,
219 const unsigned char ivec[16],
220 unsigned char cmac[16]);
221
222 void aesni_ccm64_decrypt_blocks (const unsigned char *in,
223 unsigned char *out,
224 size_t blocks,
225 const void *key,
226 const unsigned char ivec[16],
227 unsigned char cmac[16]);
228
229 static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
230 const unsigned char *iv, int enc)
231 {
232 int ret, mode;
233 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
234
235 mode = ctx->cipher->flags & EVP_CIPH_MODE;
236 if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
237 && !enc)
238 {
239 ret = aesni_set_decrypt_key(key, ctx->key_len*8, ctx->cipher_data);
240 dat->block = (block128_f)aesni_decrypt;
241 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
242 (cbc128_f)aesni_cbc_encrypt :
243 NULL;
244 }
245 else {
246 ret = aesni_set_encrypt_key(key, ctx->key_len*8, ctx->cipher_data);
247 dat->block = (block128_f)aesni_encrypt;
248 if (mode==EVP_CIPH_CBC_MODE)
249 dat->stream.cbc = (cbc128_f)aesni_cbc_encrypt;
250 else if (mode==EVP_CIPH_CTR_MODE)
251 dat->stream.ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
252 else
253 dat->stream.cbc = NULL;
254 }
255
256 if(ret < 0)
257 {
258 EVPerr(EVP_F_AESNI_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
259 return 0;
260 }
261
262 return 1;
263 }
264
265 static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
266 const unsigned char *in, size_t len)
267 {
268 aesni_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
269
270 return 1;
271 }
272
273 static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
274 const unsigned char *in, size_t len)
275 {
276 size_t bl = ctx->cipher->block_size;
277
278 if (len<bl) return 1;
279
280 aesni_ecb_encrypt(in,out,len,ctx->cipher_data,ctx->encrypt);
281
282 return 1;
283 }
284
285 #define aesni_ofb_cipher aes_ofb_cipher
286 static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
287 const unsigned char *in,size_t len);
288
289 #define aesni_cfb_cipher aes_cfb_cipher
290 static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
291 const unsigned char *in,size_t len);
292
293 #define aesni_cfb8_cipher aes_cfb8_cipher
294 static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
295 const unsigned char *in,size_t len);
296
297 #define aesni_cfb1_cipher aes_cfb1_cipher
298 static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
299 const unsigned char *in,size_t len);
300
301 #define aesni_ctr_cipher aes_ctr_cipher
302 static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
303 const unsigned char *in, size_t len);
304
305 static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
306 const unsigned char *iv, int enc)
307 {
308 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
309 if (!iv && !key)
310 return 1;
311 if (key)
312 {
313 aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
314 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
315 (block128_f)aesni_encrypt);
316 gctx->ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
317 /* If we have an iv can set it directly, otherwise use
318 * saved IV.
319 */
320 if (iv == NULL && gctx->iv_set)
321 iv = gctx->iv;
322 if (iv)
323 {
324 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
325 gctx->iv_set = 1;
326 }
327 gctx->key_set = 1;
328 }
329 else
330 {
331 /* If key set use IV, otherwise copy */
332 if (gctx->key_set)
333 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
334 else
335 memcpy(gctx->iv, iv, gctx->ivlen);
336 gctx->iv_set = 1;
337 gctx->iv_gen = 0;
338 }
339 return 1;
340 }
341
342 #define aesni_gcm_cipher aes_gcm_cipher
343 static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
344 const unsigned char *in, size_t len);
345
346 static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
347 const unsigned char *iv, int enc)
348 {
349 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
350 if (!iv && !key)
351 return 1;
352
353 if (key)
354 {
355 /* key_len is two AES keys */
356 if (enc)
357 {
358 aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
359 xctx->xts.block1 = (block128_f)aesni_encrypt;
360 xctx->stream = aesni_xts_encrypt;
361 }
362 else
363 {
364 aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
365 xctx->xts.block1 = (block128_f)aesni_decrypt;
366 xctx->stream = aesni_xts_decrypt;
367 }
368
369 aesni_set_encrypt_key(key + ctx->key_len/2,
370 ctx->key_len * 4, &xctx->ks2);
371 xctx->xts.block2 = (block128_f)aesni_encrypt;
372
373 xctx->xts.key1 = &xctx->ks1;
374 }
375
376 if (iv)
377 {
378 xctx->xts.key2 = &xctx->ks2;
379 memcpy(ctx->iv, iv, 16);
380 }
381
382 return 1;
383 }
384
385 #define aesni_xts_cipher aes_xts_cipher
386 static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
387 const unsigned char *in, size_t len);
388
389 static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
390 const unsigned char *iv, int enc)
391 {
392 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
393 if (!iv && !key)
394 return 1;
395 if (key)
396 {
397 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
398 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
399 &cctx->ks, (block128_f)aesni_encrypt);
400 cctx->str = enc?(ccm128_f)aesni_ccm64_encrypt_blocks :
401 (ccm128_f)aesni_ccm64_decrypt_blocks;
402 cctx->key_set = 1;
403 }
404 if (iv)
405 {
406 memcpy(ctx->iv, iv, 15 - cctx->L);
407 cctx->iv_set = 1;
408 }
409 return 1;
410 }
411
412 #define aesni_ccm_cipher aes_ccm_cipher
413 static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
414 const unsigned char *in, size_t len);
415
416 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
417 static const EVP_CIPHER aesni_##keylen##_##mode = { \
418 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
419 flags|EVP_CIPH_##MODE##_MODE, \
420 aesni_init_key, \
421 aesni_##mode##_cipher, \
422 NULL, \
423 sizeof(EVP_AES_KEY), \
424 NULL,NULL,NULL,NULL }; \
425 static const EVP_CIPHER aes_##keylen##_##mode = { \
426 nid##_##keylen##_##nmode,blocksize, \
427 keylen/8,ivlen, \
428 flags|EVP_CIPH_##MODE##_MODE, \
429 aes_init_key, \
430 aes_##mode##_cipher, \
431 NULL, \
432 sizeof(EVP_AES_KEY), \
433 NULL,NULL,NULL,NULL }; \
434 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
435 { return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
436
437 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
438 static const EVP_CIPHER aesni_##keylen##_##mode = { \
439 nid##_##keylen##_##mode,blocksize, \
440 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
441 flags|EVP_CIPH_##MODE##_MODE, \
442 aesni_##mode##_init_key, \
443 aesni_##mode##_cipher, \
444 aes_##mode##_cleanup, \
445 sizeof(EVP_AES_##MODE##_CTX), \
446 NULL,NULL,aes_##mode##_ctrl,NULL }; \
447 static const EVP_CIPHER aes_##keylen##_##mode = { \
448 nid##_##keylen##_##mode,blocksize, \
449 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
450 flags|EVP_CIPH_##MODE##_MODE, \
451 aes_##mode##_init_key, \
452 aes_##mode##_cipher, \
453 aes_##mode##_cleanup, \
454 sizeof(EVP_AES_##MODE##_CTX), \
455 NULL,NULL,aes_##mode##_ctrl,NULL }; \
456 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
457 { return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
458
459 #else
460
461 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
462 static const EVP_CIPHER aes_##keylen##_##mode = { \
463 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
464 flags|EVP_CIPH_##MODE##_MODE, \
465 aes_init_key, \
466 aes_##mode##_cipher, \
467 NULL, \
468 sizeof(EVP_AES_KEY), \
469 NULL,NULL,NULL,NULL }; \
470 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
471 { return &aes_##keylen##_##mode; }
472
473 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
474 static const EVP_CIPHER aes_##keylen##_##mode = { \
475 nid##_##keylen##_##mode,blocksize, \
476 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
477 flags|EVP_CIPH_##MODE##_MODE, \
478 aes_##mode##_init_key, \
479 aes_##mode##_cipher, \
480 aes_##mode##_cleanup, \
481 sizeof(EVP_AES_##MODE##_CTX), \
482 NULL,NULL,aes_##mode##_ctrl,NULL }; \
483 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
484 { return &aes_##keylen##_##mode; }
485 #endif
486
487 #define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \
488 BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
489 BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
490 BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
491 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
492 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \
493 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \
494 BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
495
496 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
497 const unsigned char *iv, int enc)
498 {
499 int ret, mode;
500 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
501
502 mode = ctx->cipher->flags & EVP_CIPH_MODE;
503 if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
504 && !enc)
505 #ifdef BSAES_CAPABLE
506 if (BSAES_CAPABLE && mode==EVP_CIPH_CBC_MODE)
507 {
508 ret = AES_set_decrypt_key(key,ctx->key_len*8,&dat->ks);
509 dat->block = (block128_f)AES_decrypt;
510 dat->stream.cbc = (cbc128_f)bsaes_cbc_encrypt;
511 }
512 else
513 #endif
514 #ifdef VPAES_CAPABLE
515 if (VPAES_CAPABLE)
516 {
517 ret = vpaes_set_decrypt_key(key,ctx->key_len*8,&dat->ks);
518 dat->block = (block128_f)vpaes_decrypt;
519 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
520 (cbc128_f)vpaes_cbc_encrypt :
521 NULL;
522 }
523 else
524 #endif
525 {
526 ret = AES_set_decrypt_key(key,ctx->key_len*8,&dat->ks);
527 dat->block = (block128_f)AES_decrypt;
528 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
529 (cbc128_f)AES_cbc_encrypt :
530 NULL;
531 }
532 else
533 #ifdef BSAES_CAPABLE
534 if (BSAES_CAPABLE && mode==EVP_CIPH_CTR_MODE)
535 {
536 ret = AES_set_encrypt_key(key,ctx->key_len*8,&dat->ks);
537 dat->block = (block128_f)AES_encrypt;
538 dat->stream.ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks;
539 }
540 else
541 #endif
542 #ifdef VPAES_CAPABLE
543 if (VPAES_CAPABLE)
544 {
545 ret = vpaes_set_encrypt_key(key,ctx->key_len*8,&dat->ks);
546 dat->block = (block128_f)vpaes_encrypt;
547 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
548 (cbc128_f)vpaes_cbc_encrypt :
549 NULL;
550 }
551 else
552 #endif
553 {
554 ret = AES_set_encrypt_key(key,ctx->key_len*8,&dat->ks);
555 dat->block = (block128_f)AES_encrypt;
556 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
557 (cbc128_f)AES_cbc_encrypt :
558 NULL;
559 #ifdef AES_CTR_ASM
560 if (mode==EVP_CIPH_CTR_MODE)
561 dat->stream.ctr = (ctr128_f)AES_ctr32_encrypt;
562 #endif
563 }
564
565 if(ret < 0)
566 {
567 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
568 return 0;
569 }
570
571 return 1;
572 }
573
574 static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
575 const unsigned char *in, size_t len)
576 {
577 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
578
579 if (dat->stream.cbc)
580 (*dat->stream.cbc)(in,out,len,&dat->ks,ctx->iv,ctx->encrypt);
581 else if (ctx->encrypt)
582 CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block);
583 else
584 CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block);
585
586 return 1;
587 }
588
589 static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
590 const unsigned char *in, size_t len)
591 {
592 size_t bl = ctx->cipher->block_size;
593 size_t i;
594 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
595
596 if (len<bl) return 1;
597
598 for (i=0,len-=bl;i<=len;i+=bl)
599 (*dat->block)(in+i,out+i,&dat->ks);
600
601 return 1;
602 }
603
604 static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
605 const unsigned char *in,size_t len)
606 {
607 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
608
609 CRYPTO_ofb128_encrypt(in,out,len,&dat->ks,
610 ctx->iv,&ctx->num,dat->block);
611 return 1;
612 }
613
614 static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
615 const unsigned char *in,size_t len)
616 {
617 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
618
619 CRYPTO_cfb128_encrypt(in,out,len,&dat->ks,
620 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
621 return 1;
622 }
623
624 static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
625 const unsigned char *in,size_t len)
626 {
627 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
628
629 CRYPTO_cfb128_8_encrypt(in,out,len,&dat->ks,
630 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
631 return 1;
632 }
633
634 static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
635 const unsigned char *in,size_t len)
636 {
637 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
638
639 if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
640 CRYPTO_cfb128_1_encrypt(in,out,len,&dat->ks,
641 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
642 return 1;
643 }
644
645 while (len>=MAXBITCHUNK) {
646 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,&dat->ks,
647 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
648 len-=MAXBITCHUNK;
649 }
650 if (len)
651 CRYPTO_cfb128_1_encrypt(in,out,len*8,&dat->ks,
652 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
653
654 return 1;
655 }
656
657 static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
658 const unsigned char *in, size_t len)
659 {
660 unsigned int num = ctx->num;
661 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
662
663 if (dat->stream.ctr)
664 CRYPTO_ctr128_encrypt_ctr32(in,out,len,&dat->ks,
665 ctx->iv,ctx->buf,&num,dat->stream.ctr);
666 else
667 CRYPTO_ctr128_encrypt(in,out,len,&dat->ks,
668 ctx->iv,ctx->buf,&num,dat->block);
669 ctx->num = (size_t)num;
670 return 1;
671 }
672
673 BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS)
674 BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS)
675 BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS)
676
677 static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
678 {
679 EVP_AES_GCM_CTX *gctx = c->cipher_data;
680 OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
681 if (gctx->iv != c->iv)
682 OPENSSL_free(gctx->iv);
683 return 1;
684 }
685
686 /* increment counter (64-bit int) by 1 */
687 static void ctr64_inc(unsigned char *counter) {
688 int n=8;
689 unsigned char c;
690
691 do {
692 --n;
693 c = counter[n];
694 ++c;
695 counter[n] = c;
696 if (c) return;
697 } while (n);
698 }
699
700 static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
701 {
702 EVP_AES_GCM_CTX *gctx = c->cipher_data;
703 switch (type)
704 {
705 case EVP_CTRL_INIT:
706 gctx->key_set = 0;
707 gctx->iv_set = 0;
708 gctx->ivlen = c->cipher->iv_len;
709 gctx->iv = c->iv;
710 gctx->taglen = -1;
711 gctx->iv_gen = 0;
712 gctx->tls_aad_len = -1;
713 return 1;
714
715 case EVP_CTRL_GCM_SET_IVLEN:
716 if (arg <= 0)
717 return 0;
718 #ifdef OPENSSL_FIPS
719 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
720 && arg < 12)
721 return 0;
722 #endif
723 /* Allocate memory for IV if needed */
724 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
725 {
726 if (gctx->iv != c->iv)
727 OPENSSL_free(gctx->iv);
728 gctx->iv = OPENSSL_malloc(arg);
729 if (!gctx->iv)
730 return 0;
731 }
732 gctx->ivlen = arg;
733 return 1;
734
735 case EVP_CTRL_GCM_SET_TAG:
736 if (arg <= 0 || arg > 16 || c->encrypt)
737 return 0;
738 memcpy(c->buf, ptr, arg);
739 gctx->taglen = arg;
740 return 1;
741
742 case EVP_CTRL_GCM_GET_TAG:
743 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
744 return 0;
745 memcpy(ptr, c->buf, arg);
746 return 1;
747
748 case EVP_CTRL_GCM_SET_IV_FIXED:
749 /* Special case: -1 length restores whole IV */
750 if (arg == -1)
751 {
752 memcpy(gctx->iv, ptr, gctx->ivlen);
753 gctx->iv_gen = 1;
754 return 1;
755 }
756 /* Fixed field must be at least 4 bytes and invocation field
757 * at least 8.
758 */
759 if ((arg < 4) || (gctx->ivlen - arg) < 8)
760 return 0;
761 if (arg)
762 memcpy(gctx->iv, ptr, arg);
763 if (c->encrypt &&
764 RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
765 return 0;
766 gctx->iv_gen = 1;
767 return 1;
768
769 case EVP_CTRL_GCM_IV_GEN:
770 if (gctx->iv_gen == 0 || gctx->key_set == 0)
771 return 0;
772 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
773 if (arg <= 0 || arg > gctx->ivlen)
774 arg = gctx->ivlen;
775 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
776 /* Invocation field will be at least 8 bytes in size and
777 * so no need to check wrap around or increment more than
778 * last 8 bytes.
779 */
780 ctr64_inc(gctx->iv + gctx->ivlen - 8);
781 gctx->iv_set = 1;
782 return 1;
783
784 case EVP_CTRL_GCM_SET_IV_INV:
785 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
786 return 0;
787 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
788 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
789 gctx->iv_set = 1;
790 return 1;
791
792 case EVP_CTRL_AEAD_TLS1_AAD:
793 /* Save the AAD for later use */
794 if (arg != 13)
795 return 0;
796 memcpy(c->buf, ptr, arg);
797 gctx->tls_aad_len = arg;
798 {
799 unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1];
800 /* Correct length for explicit IV */
801 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
802 /* If decrypting correct for tag too */
803 if (!c->encrypt)
804 len -= EVP_GCM_TLS_TAG_LEN;
805 c->buf[arg-2] = len>>8;
806 c->buf[arg-1] = len & 0xff;
807 }
808 /* Extra padding: tag appended to record */
809 return EVP_GCM_TLS_TAG_LEN;
810
811 case EVP_CTRL_COPY:
812 {
813 EVP_CIPHER_CTX *out = ptr;
814 EVP_AES_GCM_CTX *gctx_out = out->cipher_data;
815 if (gctx->gcm.key)
816 {
817 if (gctx->gcm.key != &gctx->ks)
818 return 0;
819 gctx_out->gcm.key = &gctx_out->ks;
820 }
821 if (gctx->iv == c->iv)
822 gctx_out->iv = out->iv;
823 else
824 {
825 gctx_out->iv = OPENSSL_malloc(gctx->ivlen);
826 if (!gctx_out->iv)
827 return 0;
828 memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
829 }
830 return 1;
831 }
832
833 default:
834 return -1;
835
836 }
837 }
838
839 static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
840 const unsigned char *iv, int enc)
841 {
842 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
843 if (!iv && !key)
844 return 1;
845 if (key)
846 { do {
847 #ifdef BSAES_CAPABLE
848 if (BSAES_CAPABLE)
849 {
850 AES_set_encrypt_key(key,ctx->key_len*8,&gctx->ks);
851 CRYPTO_gcm128_init(&gctx->gcm,&gctx->ks,
852 (block128_f)AES_encrypt);
853 gctx->ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks;
854 break;
855 }
856 else
857 #endif
858 #ifdef VPAES_CAPABLE
859 if (VPAES_CAPABLE)
860 {
861 vpaes_set_encrypt_key(key,ctx->key_len*8,&gctx->ks);
862 CRYPTO_gcm128_init(&gctx->gcm,&gctx->ks,
863 (block128_f)vpaes_encrypt);
864 gctx->ctr = NULL;
865 break;
866 }
867 else
868 #endif
869 (void)0; /* terminate potentially open 'else' */
870
871 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
872 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
873 #ifdef AES_CTR_ASM
874 gctx->ctr = (ctr128_f)AES_ctr32_encrypt;
875 #else
876 gctx->ctr = NULL;
877 #endif
878 } while (0);
879
880 /* If we have an iv can set it directly, otherwise use
881 * saved IV.
882 */
883 if (iv == NULL && gctx->iv_set)
884 iv = gctx->iv;
885 if (iv)
886 {
887 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
888 gctx->iv_set = 1;
889 }
890 gctx->key_set = 1;
891 }
892 else
893 {
894 /* If key set use IV, otherwise copy */
895 if (gctx->key_set)
896 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
897 else
898 memcpy(gctx->iv, iv, gctx->ivlen);
899 gctx->iv_set = 1;
900 gctx->iv_gen = 0;
901 }
902 return 1;
903 }
904
905 /* Handle TLS GCM packet format. This consists of the last portion of the IV
906 * followed by the payload and finally the tag. On encrypt generate IV,
907 * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
908 * and verify tag.
909 */
910
911 static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
912 const unsigned char *in, size_t len)
913 {
914 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
915 int rv = -1;
916 /* Encrypt/decrypt must be performed in place */
917 if (out != in || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN+EVP_GCM_TLS_TAG_LEN))
918 return -1;
919 /* Set IV from start of buffer or generate IV and write to start
920 * of buffer.
921 */
922 if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
923 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
924 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
925 goto err;
926 /* Use saved AAD */
927 if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
928 goto err;
929 /* Fix buffer and length to point to payload */
930 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
931 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
932 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
933 if (ctx->encrypt)
934 {
935 /* Encrypt payload */
936 if (gctx->ctr)
937 {
938 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
939 in, out, len,
940 gctx->ctr))
941 goto err;
942 }
943 else {
944 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
945 goto err;
946 }
947 out += len;
948 /* Finally write tag */
949 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
950 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
951 }
952 else
953 {
954 /* Decrypt */
955 if (gctx->ctr)
956 {
957 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
958 in, out, len,
959 gctx->ctr))
960 goto err;
961 }
962 else {
963 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
964 goto err;
965 }
966 /* Retrieve tag */
967 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
968 EVP_GCM_TLS_TAG_LEN);
969 /* If tag mismatch wipe buffer */
970 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
971 {
972 OPENSSL_cleanse(out, len);
973 goto err;
974 }
975 rv = len;
976 }
977
978 err:
979 gctx->iv_set = 0;
980 gctx->tls_aad_len = -1;
981 return rv;
982 }
983
984 static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
985 const unsigned char *in, size_t len)
986 {
987 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
988 /* If not set up, return error */
989 if (!gctx->key_set)
990 return -1;
991
992 if (gctx->tls_aad_len >= 0)
993 return aes_gcm_tls_cipher(ctx, out, in, len);
994
995 if (!gctx->iv_set)
996 return -1;
997 if (in)
998 {
999 if (out == NULL)
1000 {
1001 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
1002 return -1;
1003 }
1004 else if (ctx->encrypt)
1005 {
1006 if (gctx->ctr)
1007 {
1008 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
1009 in, out, len,
1010 gctx->ctr))
1011 return -1;
1012 }
1013 else {
1014 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
1015 return -1;
1016 }
1017 }
1018 else
1019 {
1020 if (gctx->ctr)
1021 {
1022 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
1023 in, out, len,
1024 gctx->ctr))
1025 return -1;
1026 }
1027 else {
1028 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1029 return -1;
1030 }
1031 }
1032 return len;
1033 }
1034 else
1035 {
1036 if (!ctx->encrypt)
1037 {
1038 if (gctx->taglen < 0)
1039 return -1;
1040 if (CRYPTO_gcm128_finish(&gctx->gcm,
1041 ctx->buf, gctx->taglen) != 0)
1042 return -1;
1043 gctx->iv_set = 0;
1044 return 0;
1045 }
1046 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
1047 gctx->taglen = 16;
1048 /* Don't reuse the IV */
1049 gctx->iv_set = 0;
1050 return 0;
1051 }
1052
1053 }
1054
1055 #define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
1056 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
1057 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
1058 | EVP_CIPH_CUSTOM_COPY)
1059
1060 BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM,
1061 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1062 BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM,
1063 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1064 BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM,
1065 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1066
1067 static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1068 {
1069 EVP_AES_XTS_CTX *xctx = c->cipher_data;
1070 if (type == EVP_CTRL_COPY)
1071 {
1072 EVP_CIPHER_CTX *out = ptr;
1073 EVP_AES_XTS_CTX *xctx_out = out->cipher_data;
1074 if (xctx->xts.key1)
1075 {
1076 if (xctx->xts.key1 != &xctx->ks1)
1077 return 0;
1078 xctx_out->xts.key1 = &xctx_out->ks1;
1079 }
1080 if (xctx->xts.key2)
1081 {
1082 if (xctx->xts.key2 != &xctx->ks2)
1083 return 0;
1084 xctx_out->xts.key2 = &xctx_out->ks2;
1085 }
1086 return 1;
1087 }
1088 else if (type != EVP_CTRL_INIT)
1089 return -1;
1090 /* key1 and key2 are used as an indicator both key and IV are set */
1091 xctx->xts.key1 = NULL;
1092 xctx->xts.key2 = NULL;
1093 return 1;
1094 }
1095
1096 static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1097 const unsigned char *iv, int enc)
1098 {
1099 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1100 if (!iv && !key)
1101 return 1;
1102
1103 if (key) do
1104 {
1105 #ifdef AES_XTS_ASM
1106 xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt;
1107 #else
1108 xctx->stream = NULL;
1109 #endif
1110 /* key_len is two AES keys */
1111 #ifdef BSAES_CAPABLE
1112 if (BSAES_CAPABLE)
1113 xctx->stream = enc ? bsaes_xts_encrypt : bsaes_xts_decrypt;
1114 else
1115 #endif
1116 #ifdef VPAES_CAPABLE
1117 if (VPAES_CAPABLE)
1118 {
1119 if (enc)
1120 {
1121 vpaes_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1122 xctx->xts.block1 = (block128_f)vpaes_encrypt;
1123 }
1124 else
1125 {
1126 vpaes_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1127 xctx->xts.block1 = (block128_f)vpaes_decrypt;
1128 }
1129
1130 vpaes_set_encrypt_key(key + ctx->key_len/2,
1131 ctx->key_len * 4, &xctx->ks2);
1132 xctx->xts.block2 = (block128_f)vpaes_encrypt;
1133
1134 xctx->xts.key1 = &xctx->ks1;
1135 break;
1136 }
1137 else
1138 #endif
1139 (void)0; /* terminate potentially open 'else' */
1140
1141 if (enc)
1142 {
1143 AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1144 xctx->xts.block1 = (block128_f)AES_encrypt;
1145 }
1146 else
1147 {
1148 AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1149 xctx->xts.block1 = (block128_f)AES_decrypt;
1150 }
1151
1152 AES_set_encrypt_key(key + ctx->key_len/2,
1153 ctx->key_len * 4, &xctx->ks2);
1154 xctx->xts.block2 = (block128_f)AES_encrypt;
1155
1156 xctx->xts.key1 = &xctx->ks1;
1157 } while (0);
1158
1159 if (iv)
1160 {
1161 xctx->xts.key2 = &xctx->ks2;
1162 memcpy(ctx->iv, iv, 16);
1163 }
1164
1165 return 1;
1166 }
1167
1168 static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1169 const unsigned char *in, size_t len)
1170 {
1171 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1172 if (!xctx->xts.key1 || !xctx->xts.key2)
1173 return 0;
1174 if (!out || !in || len<AES_BLOCK_SIZE)
1175 return 0;
1176 #ifdef OPENSSL_FIPS
1177 /* Requirement of SP800-38E */
1178 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
1179 (len > (1UL<<20)*16))
1180 {
1181 EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE);
1182 return 0;
1183 }
1184 #endif
1185 if (xctx->stream)
1186 (*xctx->stream)(in, out, len,
1187 xctx->xts.key1, xctx->xts.key2, ctx->iv);
1188 else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1189 ctx->encrypt))
1190 return 0;
1191 return 1;
1192 }
1193
1194 #define aes_xts_cleanup NULL
1195
1196 #define XTS_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV \
1197 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
1198 | EVP_CIPH_CUSTOM_COPY)
1199
1200 BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|XTS_FLAGS)
1201 BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|XTS_FLAGS)
1202
1203 static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1204 {
1205 EVP_AES_CCM_CTX *cctx = c->cipher_data;
1206 switch (type)
1207 {
1208 case EVP_CTRL_INIT:
1209 cctx->key_set = 0;
1210 cctx->iv_set = 0;
1211 cctx->L = 8;
1212 cctx->M = 12;
1213 cctx->tag_set = 0;
1214 cctx->len_set = 0;
1215 return 1;
1216
1217 case EVP_CTRL_CCM_SET_IVLEN:
1218 arg = 15 - arg;
1219 case EVP_CTRL_CCM_SET_L:
1220 if (arg < 2 || arg > 8)
1221 return 0;
1222 cctx->L = arg;
1223 return 1;
1224
1225 case EVP_CTRL_CCM_SET_TAG:
1226 if ((arg & 1) || arg < 4 || arg > 16)
1227 return 0;
1228 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1229 return 0;
1230 if (ptr)
1231 {
1232 cctx->tag_set = 1;
1233 memcpy(c->buf, ptr, arg);
1234 }
1235 cctx->M = arg;
1236 return 1;
1237
1238 case EVP_CTRL_CCM_GET_TAG:
1239 if (!c->encrypt || !cctx->tag_set)
1240 return 0;
1241 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
1242 return 0;
1243 cctx->tag_set = 0;
1244 cctx->iv_set = 0;
1245 cctx->len_set = 0;
1246 return 1;
1247
1248 case EVP_CTRL_COPY:
1249 {
1250 EVP_CIPHER_CTX *out = ptr;
1251 EVP_AES_CCM_CTX *cctx_out = out->cipher_data;
1252 if (cctx->ccm.key)
1253 {
1254 if (cctx->ccm.key != &cctx->ks)
1255 return 0;
1256 cctx_out->ccm.key = &cctx_out->ks;
1257 }
1258 return 1;
1259 }
1260
1261 default:
1262 return -1;
1263
1264 }
1265 }
1266
1267 static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1268 const unsigned char *iv, int enc)
1269 {
1270 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1271 if (!iv && !key)
1272 return 1;
1273 if (key) do
1274 {
1275 #ifdef VPAES_CAPABLE
1276 if (VPAES_CAPABLE)
1277 {
1278 vpaes_set_encrypt_key(key, ctx->key_len*8, &cctx->ks);
1279 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1280 &cctx->ks, (block128_f)vpaes_encrypt);
1281 cctx->str = NULL;
1282 cctx->key_set = 1;
1283 break;
1284 }
1285 #endif
1286 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
1287 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1288 &cctx->ks, (block128_f)AES_encrypt);
1289 cctx->str = NULL;
1290 cctx->key_set = 1;
1291 } while (0);
1292 if (iv)
1293 {
1294 memcpy(ctx->iv, iv, 15 - cctx->L);
1295 cctx->iv_set = 1;
1296 }
1297 return 1;
1298 }
1299
1300 static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1301 const unsigned char *in, size_t len)
1302 {
1303 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1304 CCM128_CONTEXT *ccm = &cctx->ccm;
1305 /* If not set up, return error */
1306 if (!cctx->iv_set && !cctx->key_set)
1307 return -1;
1308 if (!ctx->encrypt && !cctx->tag_set)
1309 return -1;
1310 if (!out)
1311 {
1312 if (!in)
1313 {
1314 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
1315 return -1;
1316 cctx->len_set = 1;
1317 return len;
1318 }
1319 /* If have AAD need message length */
1320 if (!cctx->len_set && len)
1321 return -1;
1322 CRYPTO_ccm128_aad(ccm, in, len);
1323 return len;
1324 }
1325 /* EVP_*Final() doesn't return any data */
1326 if (!in)
1327 return 0;
1328 /* If not set length yet do it */
1329 if (!cctx->len_set)
1330 {
1331 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1332 return -1;
1333 cctx->len_set = 1;
1334 }
1335 if (ctx->encrypt)
1336 {
1337 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
1338 cctx->str) :
1339 CRYPTO_ccm128_encrypt(ccm, in, out, len))
1340 return -1;
1341 cctx->tag_set = 1;
1342 return len;
1343 }
1344 else
1345 {
1346 int rv = -1;
1347 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
1348 cctx->str) :
1349 !CRYPTO_ccm128_decrypt(ccm, in, out, len))
1350 {
1351 unsigned char tag[16];
1352 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
1353 {
1354 if (!memcmp(tag, ctx->buf, cctx->M))
1355 rv = len;
1356 }
1357 }
1358 if (rv == -1)
1359 OPENSSL_cleanse(out, len);
1360 cctx->iv_set = 0;
1361 cctx->tag_set = 0;
1362 cctx->len_set = 0;
1363 return rv;
1364 }
1365
1366 }
1367
1368 #define aes_ccm_cleanup NULL
1369
1370 BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1371 BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1372 BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1373
1374 #endif
1375 #endif