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Expand range of ctrls for AES GCM to support retrieval and setting of
[thirdparty/openssl.git] / crypto / evp / e_aes.c
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deb2c1a1 1/* ====================================================================
17f121de 2 * Copyright (c) 2001-2011 The OpenSSL Project. All rights reserved.
deb2c1a1
DSH		 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
14ae26f2
DSH		 51#define OPENSSL_FIPSAPI
52
8c84b677 53#include <openssl/opensslconf.h>
77dd9c18 54#ifndef OPENSSL_NO_AES
deb2c1a1
DSH		 55#include <openssl/evp.h>
56#include <openssl/err.h>
57#include <string.h>
58#include <assert.h>
6f9079fd
RL		 59#include <openssl/aes.h>
60#include "evp_locl.h"
ab8a4e54 61#include "modes_lcl.h"
b3d8022e 62#include <openssl/rand.h>
deb2c1a1 63
6f9079fd
RL		 64typedef struct
65 {
66 AES_KEY ks;
67 } EVP_AES_KEY;
deb2c1a1 68
17f121de
AP		 69typedef struct
70 {
71 AES_KEY ks; /* AES key schedule to use */
72 int key_set; /* Set if key initialised */
73 int iv_set; /* Set if an iv is set */
74 GCM128_CONTEXT gcm;
75 unsigned char *iv; /* Temporary IV store */
76 int ivlen; /* IV length */
77 int taglen;
78 int iv_gen; /* It is OK to generate IVs */
28dd49fa 79 int tls_aad_len; /* TLS AAD length */
17f121de
AP		 80 } EVP_AES_GCM_CTX;
81
82typedef struct
83 {
84 AES_KEY ks1, ks2; /* AES key schedules to use */
85 XTS128_CONTEXT xts;
86 } EVP_AES_XTS_CTX;
87
88typedef struct
89 {
90 AES_KEY ks; /* AES key schedule to use */
91 int key_set; /* Set if key initialised */
92 int iv_set; /* Set if an iv is set */
93 int tag_set; /* Set if tag is valid */
94 int len_set; /* Set if message length set */
95 int L, M; /* L and M parameters from RFC3610 */
96 CCM128_CONTEXT ccm;
97 } EVP_AES_CCM_CTX;
98
99#define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4))
100
d1fff483
AP		 101#if defined(AES_ASM) && !defined(I386_ONLY) && ( \
102 ((defined(__i386) || defined(__i386__) || \
103 defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
104 defined(__x86_64) || defined(__x86_64__) || \
105 defined(_M_AMD64) || defined(_M_X64) || \
106 defined(__INTEL__) )
17f121de
AP		 107/*
108 * AES-NI section
109 */
110extern unsigned int OPENSSL_ia32cap_P[2];
111#define AESNI_CAPABLE (1<<(57-32))
d1fff483
AP		 112
113int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
17f121de 114 AES_KEY *key);
d1fff483 115int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
17f121de 116 AES_KEY *key);
d1fff483
AP		 117
118void aesni_encrypt(const unsigned char *in, unsigned char *out,
17f121de 119 const AES_KEY *key);
d1fff483 120void aesni_decrypt(const unsigned char *in, unsigned char *out,
17f121de 121 const AES_KEY *key);
d1fff483
AP		 122
123void aesni_ecb_encrypt(const unsigned char *in,
17f121de
AP		 124 unsigned char *out,
125 size_t length,
126 const AES_KEY *key,
127 int enc);
d1fff483 128void aesni_cbc_encrypt(const unsigned char *in,
17f121de
AP		 129 unsigned char *out,
130 size_t length,
131 const AES_KEY *key,
132 unsigned char *ivec, int enc);
d1fff483
AP		 133
134void aesni_ctr32_encrypt_blocks(const unsigned char *in,
17f121de
AP		 135 unsigned char *out,
136 size_t blocks,
137 const void *key,
138 const unsigned char *ivec);
139
140void aesni_xts_encrypt(const unsigned char *in,
141 unsigned char *out,
142 size_t length,
143 const AES_KEY *key1, const AES_KEY *key2,
144 const unsigned char iv[16]);
145
146void aesni_xts_decrypt(const unsigned char *in,
147 unsigned char *out,
148 size_t length,
149 const AES_KEY *key1, const AES_KEY *key2,
150 const unsigned char iv[16]);
151
152void aesni_ccm64_encrypt_blocks (const unsigned char *in,
153 unsigned char *out,
154 size_t blocks,
155 const void *key,
156 const unsigned char ivec[16],
157 unsigned char cmac[16]);
158
159void aesni_ccm64_decrypt_blocks (const unsigned char *in,
160 unsigned char *out,
161 size_t blocks,
162 const void *key,
163 const unsigned char ivec[16],
164 unsigned char cmac[16]);
165
166static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
d1fff483
AP		 167 const unsigned char *iv, int enc)
168 {
169 int ret;
170
171 if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
172 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
173 && !enc)
17f121de 174 ret = aesni_set_decrypt_key(key, ctx->key_len*8, ctx->cipher_data);
d1fff483 175 else
17f121de 176 ret = aesni_set_encrypt_key(key, ctx->key_len*8, ctx->cipher_data);
d1fff483
AP		 177
178 if(ret < 0)
179 {
180 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
181 return 0;
182 }
183
184 return 1;
185 }
186
17f121de 187static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
d1fff483
AP		 188 const unsigned char *in, size_t len)
189{
17f121de 190 aesni_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
d1fff483
AP		 191
192 return 1;
193}
194
17f121de 195static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
d1fff483
AP		 196 const unsigned char *in, size_t len)
197{
198 size_t bl = ctx->cipher->block_size;
199
200 if (len<bl) return 1;
201
17f121de 202 aesni_ecb_encrypt(in,out,len,ctx->cipher_data,ctx->encrypt);
d1fff483
AP		 203
204 return 1;
205}
206
17f121de 207static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
d1fff483
AP		 208 const unsigned char *in,size_t len)
209{
210 CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
211 ctx->iv,&ctx->num,
17f121de 212 (block128_f)aesni_encrypt);
d1fff483
AP		 213 return 1;
214}
215
17f121de 216static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
d1fff483
AP		 217 const unsigned char *in,size_t len)
218{
219 CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
220 ctx->iv,&ctx->num,ctx->encrypt,
17f121de 221 (block128_f)aesni_encrypt);
d1fff483
AP		 222 return 1;
223}
224
17f121de 225static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
d1fff483
AP		 226 const unsigned char *in,size_t len)
227{
228 CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
229 ctx->iv,&ctx->num,ctx->encrypt,
17f121de 230 (block128_f)aesni_encrypt);
d1fff483
AP		 231 return 1;
232}
233
17f121de 234static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
d1fff483
AP		 235 const unsigned char *in,size_t len)
236{
e76cbcf6
AP		 237 if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
238 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
17f121de
AP		 239 ctx->iv,&ctx->num,ctx->encrypt,
240 (block128_f)aesni_encrypt);
e76cbcf6
AP		 241 return 1;
242 }
243
244 while (len>=MAXBITCHUNK) {
245 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
17f121de
AP		 246 ctx->iv,&ctx->num,ctx->encrypt,
247 (block128_f)aesni_encrypt);
e76cbcf6
AP		 248 len-=MAXBITCHUNK;
249 }
250 if (len)
251 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
17f121de
AP		 252 ctx->iv,&ctx->num,ctx->encrypt,
253 (block128_f)aesni_encrypt);
e76cbcf6 254
d1fff483
AP		 255 return 1;
256}
257
17f121de 258static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
d1fff483
AP		 259 const unsigned char *in, size_t len)
260{
261 unsigned int num;
262 num = ctx->num;
263
17f121de 264 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
d1fff483
AP		 265 ctx->cipher_data,ctx->iv,ctx->buf,&num,
266 (ctr128_f)aesni_ctr32_encrypt_blocks);
17f121de 267
d1fff483
AP		 268 ctx->num = (size_t)num;
269 return 1;
270}
271
17f121de
AP		 272static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
273 const unsigned char *iv, int enc)
274 {
275 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
276 if (!iv && !key)
277 return 1;
278 if (key)
279 {
280 aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
281 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
282 (block128_f)aesni_encrypt);
283 /* If we have an iv can set it directly, otherwise use
284 * saved IV.
285 */
286 if (iv == NULL && gctx->iv_set)
287 iv = gctx->iv;
288 if (iv)
289 {
290 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
291 gctx->iv_set = 1;
292 }
293 gctx->key_set = 1;
294 }
295 else
296 {
297 /* If key set use IV, otherwise copy */
298 if (gctx->key_set)
299 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
300 else
301 memcpy(gctx->iv, iv, gctx->ivlen);
302 gctx->iv_set = 1;
303 gctx->iv_gen = 0;
304 }
305 return 1;
306 }
307
308static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
309 const unsigned char *in, size_t len)
310 {
311 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
312 /* If not set up, return error */
313 if (!gctx->iv_set && !gctx->key_set)
314 return -1;
315 if (!ctx->encrypt && gctx->taglen < 0)
316 return -1;
317 if (in)
318 {
319 if (out == NULL)
320 {
321 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
322 return -1;
323 }
324 else if (ctx->encrypt)
325 {
326 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
327 in, out, len,
328 aesni_ctr32_encrypt_blocks))
329 return -1;
330 }
331 else
332 {
333 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
334 in, out, len,
335 aesni_ctr32_encrypt_blocks))
336 return -1;
337 }
338 return len;
339 }
340 else
341 {
342 if (!ctx->encrypt)
343 {
344 if (CRYPTO_gcm128_finish(&gctx->gcm,
345 ctx->buf, gctx->taglen) != 0)
346 return -1;
347 gctx->iv_set = 0;
348 return 0;
349 }
350 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
351 gctx->taglen = 16;
352 /* Don't reuse the IV */
353 gctx->iv_set = 0;
354 return 0;
355 }
356
357 }
358
359static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
360 const unsigned char *iv, int enc)
361 {
362 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
363 if (!iv && !key)
364 return 1;
365
366 if (key)
367 {
368 /* key_len is two AES keys */
369 if (enc)
370 {
371 aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
372 xctx->xts.block1 = (block128_f)aesni_encrypt;
373 }
374 else
375 {
376 aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
377 xctx->xts.block1 = (block128_f)aesni_decrypt;
378 }
379
380 aesni_set_encrypt_key(key + ctx->key_len/2,
381 ctx->key_len * 4, &xctx->ks2);
382 xctx->xts.block2 = (block128_f)aesni_encrypt;
383
384 xctx->xts.key1 = &xctx->ks1;
385 }
386
387 if (iv)
388 {
389 xctx->xts.key2 = &xctx->ks2;
390 memcpy(ctx->iv, iv, 16);
391 }
392
393 return 1;
394 }
395
396static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
397 const unsigned char *in, size_t len)
398 {
399 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
400 if (!xctx->xts.key1 || !xctx->xts.key2)
401 return -1;
402 if (!out || !in)
403 return -1;
404#ifdef OPENSSL_FIPS
405 /* Requirement of SP800-38E */
406 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
407 (len > (1L<<20)*16))
408 {
409 EVPerr(EVP_F_AES_XTS, EVP_R_TOO_LARGE);
410 return -1;
411 }
412#endif
413 if (ctx->encrypt)
414 aesni_xts_encrypt(in, out, len,
415 xctx->xts.key1, xctx->xts.key2, ctx->iv);
416 else
417 aesni_xts_decrypt(in, out, len,
418 xctx->xts.key1, xctx->xts.key2, ctx->iv);
419
420 return len;
421 }
422
423static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
424 const unsigned char *iv, int enc)
425 {
426 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
427 if (!iv && !key)
428 return 1;
429 if (key)
430 {
431 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
432 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
433 &cctx->ks, (block128_f)aesni_encrypt);
434 cctx->key_set = 1;
435 }
436 if (iv)
437 {
438 memcpy(ctx->iv, iv, 15 - cctx->L);
439 cctx->iv_set = 1;
440 }
441 return 1;
442 }
443
444static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
445 const unsigned char *in, size_t len)
446 {
447 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
448 CCM128_CONTEXT *ccm = &cctx->ccm;
449 /* If not set up, return error */
450 if (!cctx->iv_set && !cctx->key_set)
451 return -1;
452 if (!ctx->encrypt && !cctx->tag_set)
453 return -1;
454 if (!out)
455 {
456 if (!in)
457 {
458 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
459 return -1;
460 cctx->len_set = 1;
461 return len;
462 }
463 /* If have AAD need message length */
464 if (!cctx->len_set && len)
465 return -1;
466 CRYPTO_ccm128_aad(ccm, in, len);
467 return len;
468 }
469 /* EVP_*Final() doesn't return any data */
470 if (!in)
471 return 0;
472 /* If not set length yet do it */
473 if (!cctx->len_set)
474 {
475 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
476 return -1;
477 cctx->len_set = 1;
478 }
479 if (ctx->encrypt)
480 {
481 if (CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
482 aesni_ccm64_encrypt_blocks))
483 return -1;
484 cctx->tag_set = 1;
485 return len;
486 }
487 else
488 {
489 int rv = -1;
490 if (!CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
491 aesni_ccm64_decrypt_blocks))
492 {
493 unsigned char tag[16];
494 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
495 {
496 if (!memcmp(tag, ctx->buf, cctx->M))
497 rv = len;
498 }
499 }
500 if (rv == -1)
501 OPENSSL_cleanse(out, len);
502 cctx->iv_set = 0;
503 cctx->tag_set = 0;
504 cctx->len_set = 0;
505 return rv;
506 }
507
508 }
509
510#define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
511static const EVP_CIPHER aesni_##keylen##_##mode = { \
d1fff483 512 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
17f121de
AP		 513 flags|EVP_CIPH_##MODE##_MODE, \
514 aesni_init_key, \
515 aesni_##mode##_cipher, \
516 NULL, \
517 sizeof(EVP_AES_KEY), \
d1fff483 518 NULL,NULL,NULL,NULL }; \
17f121de
AP		 519static const EVP_CIPHER aes_##keylen##_##mode = { \
520 nid##_##keylen##_##nmode,blocksize, \
521 keylen/8,ivlen, \
522 flags|EVP_CIPH_##MODE##_MODE, \
523 aes_init_key, \
524 aes_##mode##_cipher, \
525 NULL, \
526 sizeof(EVP_AES_KEY), \
527 NULL,NULL,NULL,NULL }; \
528const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
529{ return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
530 &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
531
532#define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
533static const EVP_CIPHER aesni_##keylen##_##mode = { \
534 nid##_##keylen##_##mode,blocksize, \
535 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
536 flags|EVP_CIPH_##MODE##_MODE, \
537 aesni_##mode##_init_key, \
538 aesni_##mode##_cipher, \
539 aes_##mode##_cleanup, \
540 sizeof(EVP_AES_##MODE##_CTX), \
541 NULL,NULL,aes_##mode##_ctrl,NULL }; \
542static const EVP_CIPHER aes_##keylen##_##mode = { \
543 nid##_##keylen##_##mode,blocksize, \
544 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
545 flags|EVP_CIPH_##MODE##_MODE, \
546 aes_##mode##_init_key, \
547 aes_##mode##_cipher, \
548 aes_##mode##_cleanup, \
549 sizeof(EVP_AES_##MODE##_CTX), \
550 NULL,NULL,aes_##mode##_ctrl,NULL }; \
551const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
552{ return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
553 &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
d1fff483 554
17f121de
AP		 555#else
556
557#define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
558static const EVP_CIPHER aes_##keylen##_##mode = { \
559 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
560 flags|EVP_CIPH_##MODE##_MODE, \
561 aes_init_key, \
562 aes_##mode##_cipher, \
563 NULL, \
564 sizeof(EVP_AES_KEY), \
565 NULL,NULL,NULL,NULL }; \
566const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
567{ return &aes_##keylen##_##mode; }
d1fff483 568
17f121de
AP		 569#define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
570static const EVP_CIPHER aes_##keylen##_##mode = { \
571 nid##_##keylen##_##mode,blocksize, \
572 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
573 flags|EVP_CIPH_##MODE##_MODE, \
574 aes_##mode##_init_key, \
575 aes_##mode##_cipher, \
576 aes_##mode##_cleanup, \
577 sizeof(EVP_AES_##MODE##_CTX), \
578 NULL,NULL,aes_##mode##_ctrl,NULL }; \
579const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
580{ return &aes_##keylen##_##mode; }
581#endif
d1fff483 582
17f121de
AP		 583#define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \
584 BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
585 BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
586 BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
587 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
588 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \
589 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \
590 BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
d1fff483
AP		 591
592static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
593 const unsigned char *iv, int enc)
594 {
595 int ret;
596
597 if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
598 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
599 && !enc)
17f121de 600 ret = AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
d1fff483 601 else
17f121de 602 ret = AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
d1fff483
AP		 603
604 if(ret < 0)
605 {
606 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
607 return 0;
608 }
609
610 return 1;
611 }
612
17f121de
AP		 613static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
614 const unsigned char *in, size_t len)
615{
616 AES_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
617
618 return 1;
619}
620
621static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
622 const unsigned char *in, size_t len)
623{
624 size_t bl = ctx->cipher->block_size;
625 size_t i;
626
627 if (len<bl) return 1;
628
629 if (ctx->encrypt) {
630 for (i=0,len-=bl;i<=len;i+=bl)
631 AES_encrypt(in+i,out+i,ctx->cipher_data);
632 } else {
633 for (i=0,len-=bl;i<=len;i+=bl)
634 AES_decrypt(in+i,out+i,ctx->cipher_data);
635 }
636
637 return 1;
638}
deb2c1a1 639
17f121de
AP		 640static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
641 const unsigned char *in,size_t len)
642{
643 CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
644 ctx->iv,&ctx->num,
645 (block128_f)AES_encrypt);
646 return 1;
647}
deb2c1a1 648
17f121de
AP		 649static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
650 const unsigned char *in,size_t len)
651{
652 CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
653 ctx->iv,&ctx->num,ctx->encrypt,
654 (block128_f)AES_encrypt);
655 return 1;
656}
657
658static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
659 const unsigned char *in,size_t len)
660{
661 CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
662 ctx->iv,&ctx->num,ctx->encrypt,
663 (block128_f)AES_encrypt);
664 return 1;
665}
8d1ebe0b 666
17f121de
AP		 667static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
668 const unsigned char *in,size_t len)
669{
670 if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
671 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
672 ctx->iv,&ctx->num,ctx->encrypt,
673 (block128_f)AES_encrypt);
674 return 1;
675 }
8d1ebe0b 676
17f121de
AP		 677 while (len>=MAXBITCHUNK) {
678 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
679 ctx->iv,&ctx->num,ctx->encrypt,
680 (block128_f)AES_encrypt);
681 len-=MAXBITCHUNK;
682 }
683 if (len)
684 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
685 ctx->iv,&ctx->num,ctx->encrypt,
686 (block128_f)AES_encrypt);
687
688 return 1;
689}
8d1ebe0b 690
17f121de 691static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
d976f992
AP		 692 const unsigned char *in, size_t len)
693{
385a488c 694 unsigned int num;
49436b59 695 num = ctx->num;
874a3757
AP		 696#ifdef AES_CTR_ASM
697 void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
698 size_t blocks, const AES_KEY *key,
699 const unsigned char ivec[AES_BLOCK_SIZE]);
700
701 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
702 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
703 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
704#else
705 CRYPTO_ctr128_encrypt(in,out,len,
d976f992 706 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
874a3757
AP		 707 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
708#endif
385a488c 709 ctx->num = (size_t)num;
d976f992
AP		 710 return 1;
711}
712
17f121de
AP		 713BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS)
714BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS)
715BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS)
bdaa5415
DSH		 716
717static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
718 {
719 EVP_AES_GCM_CTX *gctx = c->cipher_data;
ab8a4e54 720 OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
b3d8022e
DSH		 721 if (gctx->iv != c->iv)
722 OPENSSL_free(gctx->iv);
bdaa5415
DSH		 723 return 1;
724 }
725
b3d8022e
DSH		 726/* increment counter (64-bit int) by 1 */
727static void ctr64_inc(unsigned char *counter) {
728 int n=8;
729 unsigned char c;
730
731 do {
732 --n;
733 c = counter[n];
734 ++c;
735 counter[n] = c;
736 if (c) return;
737 } while (n);
738}
739
bdaa5415
DSH		 740static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
741 {
742 EVP_AES_GCM_CTX *gctx = c->cipher_data;
743 switch (type)
744 {
745 case EVP_CTRL_INIT:
bdaa5415
DSH		 746 gctx->key_set = 0;
747 gctx->iv_set = 0;
748 gctx->ivlen = c->cipher->iv_len;
b3d8022e 749 gctx->iv = c->iv;
bdaa5415 750 gctx->taglen = -1;
b3d8022e 751 gctx->iv_gen = 0;
28dd49fa 752 gctx->tls_aad_len = -1;
bdaa5415
DSH		 753 return 1;
754
755 case EVP_CTRL_GCM_SET_IVLEN:
756 if (arg <= 0)
757 return 0;
b3d8022e 758#ifdef OPENSSL_FIPS
c2fd5989 759 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
b3d8022e
DSH		 760 && arg < 12)
761 return 0;
762#endif
763 /* Allocate memory for IV if needed */
764 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
765 {
766 if (gctx->iv != c->iv)
767 OPENSSL_free(gctx->iv);
768 gctx->iv = OPENSSL_malloc(arg);
769 if (!gctx->iv)
770 return 0;
771 }
bdaa5415
DSH		 772 gctx->ivlen = arg;
773 return 1;
774
775 case EVP_CTRL_GCM_SET_TAG:
776 if (arg <= 0 || arg > 16 || c->encrypt)
777 return 0;
3b4a8557 778 memcpy(c->buf, ptr, arg);
bdaa5415
DSH		 779 gctx->taglen = arg;
780 return 1;
781
782 case EVP_CTRL_GCM_GET_TAG:
783 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
784 return 0;
3b4a8557 785 memcpy(ptr, c->buf, arg);
bdaa5415
DSH		 786 return 1;
787
b3d8022e
DSH		 788 case EVP_CTRL_GCM_SET_IV_FIXED:
789 /* Special case: -1 length restores whole IV */
790 if (arg == -1)
791 {
792 memcpy(gctx->iv, ptr, gctx->ivlen);
793 gctx->iv_gen = 1;
794 return 1;
795 }
796 /* Fixed field must be at least 4 bytes and invocation field
797 * at least 8.
798 */
799 if ((arg < 4) || (gctx->ivlen - arg) < 8)
800 return 0;
801 if (arg)
802 memcpy(gctx->iv, ptr, arg);
28dd49fa
DSH		 803 if (c->encrypt &&
804 RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
b3d8022e
DSH		 805 return 0;
806 gctx->iv_gen = 1;
807 return 1;
808
809 case EVP_CTRL_GCM_IV_GEN:
810 if (gctx->iv_gen == 0 || gctx->key_set == 0)
811 return 0;
ab8a4e54 812 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
28dd49fa
DSH		 813 if (arg <= 0 || arg > gctx->ivlen)
814 arg = gctx->ivlen;
815 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
b3d8022e
DSH		 816 /* Invocation field will be at least 8 bytes in size and
817 * so no need to check wrap around or increment more than
818 * last 8 bytes.
819 */
820 ctr64_inc(gctx->iv + gctx->ivlen - 8);
821 gctx->iv_set = 1;
822 return 1;
823
28dd49fa
DSH		 824 case EVP_CTRL_GCM_SET_IV_INV:
825 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
826 return 0;
827 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
828 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
829 gctx->iv_set = 1;
830 return 1;
831
832 case EVP_CTRL_AEAD_TLS1_AAD:
833 /* Save the AAD for later use */
834 if (arg != 13)
835 return 0;
836 memcpy(c->buf, ptr, arg);
837 gctx->tls_aad_len = arg;
838 {
839 unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1];
840 /* Correct length for explicit IV */
841 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
842 /* If decrypting correct for tag too */
843 if (!c->encrypt)
844 len -= EVP_GCM_TLS_TAG_LEN;
845 c->buf[arg-2] = len>>8;
846 c->buf[arg-1] = len & 0xff;
847 }
848 /* Extra padding: tag appended to record */
849 return EVP_GCM_TLS_TAG_LEN;
850
bdaa5415
DSH		 851 default:
852 return -1;
853
854 }
855 }
856
857static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
858 const unsigned char *iv, int enc)
859 {
860 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
861 if (!iv && !key)
862 return 1;
863 if (key)
864 {
865 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
ab8a4e54 866 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
bdaa5415
DSH		 867 /* If we have an iv can set it directly, otherwise use
868 * saved IV.
869 */
870 if (iv == NULL && gctx->iv_set)
b3d8022e 871 iv = gctx->iv;
bdaa5415
DSH		 872 if (iv)
873 {
ab8a4e54 874 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
bdaa5415
DSH		 875 gctx->iv_set = 1;
876 }
877 gctx->key_set = 1;
878 }
879 else
880 {
881 /* If key set use IV, otherwise copy */
882 if (gctx->key_set)
ab8a4e54 883 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
bdaa5415 884 else
b3d8022e 885 memcpy(gctx->iv, iv, gctx->ivlen);
bdaa5415 886 gctx->iv_set = 1;
b3d8022e 887 gctx->iv_gen = 0;
bdaa5415
DSH		 888 }
889 return 1;
890 }
891
28dd49fa
DSH		 892/* Handle TLS GCM packet format. This consists of the last portion of the IV
893 * followed by the payload and finally the tag. On encrypt generate IV,
894 * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
895 * and verify tag.
896 */
897
898static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
899 const unsigned char *in, size_t len)
900 {
901 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
902 int rv = -1;
903 /* Encrypt/decrypt must be performed in place */
904 if (out != in)
905 return -1;
906 /* Set IV from start of buffer or generate IV and write to start
907 * of buffer.
908 */
909 if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
910 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
911 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
912 goto err;
913 /* Use saved AAD */
914 if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
915 goto err;
916 /* Fix buffer and length to point to payload */
917 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
918 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
919 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
920 if (ctx->encrypt)
921 {
922 /* Encrypt payload */
923 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
924 goto err;
925 out += len;
926 /* Finally write tag */
927 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
928 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
929 }
930 else
931 {
932 /* Decrypt */
933 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
934 goto err;
935 /* Retrieve tag */
936 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
937 EVP_GCM_TLS_TAG_LEN);
938 /* If tag mismatch wipe buffer */
939 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
940 {
941 OPENSSL_cleanse(out, len);
942 goto err;
943 }
944 rv = len;
945 }
946
947 err:
948 gctx->iv_set = 0;
949 gctx->tls_aad_len = -1;
950 return rv;
951 }
952
17f121de 953static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
bdaa5415
DSH		 954 const unsigned char *in, size_t len)
955 {
956 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
957 /* If not set up, return error */
28dd49fa
DSH		 958 if (!gctx->key_set)
959 return -1;
960
961 if (gctx->tls_aad_len >= 0)
962 return aes_gcm_tls_cipher(ctx, out, in, len);
963
964 if (!gctx->iv_set)
bdaa5415
DSH		 965 return -1;
966 if (!ctx->encrypt && gctx->taglen < 0)
967 return -1;
968 if (in)
969 {
970 if (out == NULL)
f4001a0d 971 {
ab8a4e54 972 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
f4001a0d
DSH		 973 return -1;
974 }
bdaa5415 975 else if (ctx->encrypt)
f4001a0d 976 {
ab8a4e54 977 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
f4001a0d
DSH		 978 return -1;
979 }
bdaa5415 980 else
f4001a0d 981 {
ab8a4e54 982 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
f4001a0d
DSH		 983 return -1;
984 }
bdaa5415
DSH		 985 return len;
986 }
987 else
988 {
989 if (!ctx->encrypt)
990 {
ab8a4e54 991 if (CRYPTO_gcm128_finish(&gctx->gcm,
3b4a8557 992 ctx->buf, gctx->taglen) != 0)
bdaa5415
DSH		 993 return -1;
994 gctx->iv_set = 0;
995 return 0;
996 }
3b4a8557 997 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
bdaa5415
DSH		 998 gctx->taglen = 16;
999 /* Don't reuse the IV */
1000 gctx->iv_set = 0;
1001 return 0;
1002 }
1003
1004 }
1005
17f121de
AP		 1006#define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
1007 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
1008 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT)
32a2d8dd 1009
28dd49fa
DSH		 1010BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM,
1011 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1012BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM,
1013 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1014BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM,
1015 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
32a2d8dd
DSH		 1016
1017static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1018 {
1019 EVP_AES_XTS_CTX *xctx = c->cipher_data;
1020 if (type != EVP_CTRL_INIT)
1021 return -1;
1022 /* key1 and key2 are used as an indicator both key and IV are set */
1023 xctx->xts.key1 = NULL;
1024 xctx->xts.key2 = NULL;
32a2d8dd
DSH		 1025 return 1;
1026 }
1027
1028static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1029 const unsigned char *iv, int enc)
1030 {
1031 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1032 if (!iv && !key)
1033 return 1;
1034
1035 if (key)
1036 {
06b7e5a0 1037 /* key_len is two AES keys */
d1fff483 1038 if (enc)
06b7e5a0
DSH		 1039 {
1040 AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1041 xctx->xts.block1 = (block128_f)AES_encrypt;
1042 }
1043 else
1044 {
1045 AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1046 xctx->xts.block1 = (block128_f)AES_decrypt;
1047 }
32a2d8dd 1048
06b7e5a0
DSH		 1049 AES_set_encrypt_key(key + ctx->key_len/2,
1050 ctx->key_len * 4, &xctx->ks2);
32a2d8dd 1051 xctx->xts.block2 = (block128_f)AES_encrypt;
06b7e5a0
DSH		 1052
1053 xctx->xts.key1 = &xctx->ks1;
32a2d8dd
DSH		 1054 }
1055
1056 if (iv)
1057 {
1058 xctx->xts.key2 = &xctx->ks2;
1059 memcpy(ctx->iv, iv, 16);
1060 }
1061
1062 return 1;
1063 }
1064
17f121de 1065static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
32a2d8dd
DSH		 1066 const unsigned char *in, size_t len)
1067 {
1068 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1069 if (!xctx->xts.key1 || !xctx->xts.key2)
1070 return -1;
1071 if (!out || !in)
1072 return -1;
45321c41
DSH		 1073#ifdef OPENSSL_FIPS
1074 /* Requirement of SP800-38E */
c2fd5989 1075 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
62dc7ed6 1076 (len > (1L<<20)*16))
45321c41
DSH		 1077 {
1078 EVPerr(EVP_F_AES_XTS, EVP_R_TOO_LARGE);
1079 return -1;
1080 }
1081#endif
32a2d8dd
DSH		 1082 if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1083 ctx->encrypt))
1084 return -1;
1085 return len;
1086 }
1087
17f121de 1088#define aes_xts_cleanup NULL
23916810 1089
17f121de
AP		 1090BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1091BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
23916810
DSH		 1092
1093static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1094 {
1095 EVP_AES_CCM_CTX *cctx = c->cipher_data;
1096 switch (type)
1097 {
1098 case EVP_CTRL_INIT:
1099 cctx->key_set = 0;
1100 cctx->iv_set = 0;
1101 cctx->L = 8;
1102 cctx->M = 12;
1103 cctx->tag_set = 0;
1104 cctx->len_set = 0;
1105 return 1;
1106
1107 case EVP_CTRL_CCM_SET_IVLEN:
1108 arg = 15 - arg;
1109 case EVP_CTRL_CCM_SET_L:
1110 if (arg < 2 || arg > 8)
1111 return 0;
1112 cctx->L = arg;
1113 return 1;
1114
1115 case EVP_CTRL_CCM_SET_TAG:
1116 if ((arg & 1) || arg < 4 || arg > 16)
1117 return 0;
1118 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1119 return 0;
1120 if (ptr)
1121 {
1122 cctx->tag_set = 1;
1123 memcpy(c->buf, ptr, arg);
1124 }
1125 cctx->M = arg;
1126 return 1;
1127
1128 case EVP_CTRL_CCM_GET_TAG:
1129 if (!c->encrypt || !cctx->tag_set)
1130 return 0;
b5dd1787 1131 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
23916810
DSH		 1132 return 0;
1133 cctx->tag_set = 0;
1134 cctx->iv_set = 0;
1135 cctx->len_set = 0;
1136 return 1;
1137
1138 default:
1139 return -1;
1140
1141 }
1142 }
1143
1144static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1145 const unsigned char *iv, int enc)
1146 {
1147 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1148 if (!iv && !key)
1149 return 1;
1150 if (key)
1151 {
1152 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
1153 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1154 &cctx->ks, (block128_f)AES_encrypt);
1155 cctx->key_set = 1;
1156 }
1157 if (iv)
1158 {
1159 memcpy(ctx->iv, iv, 15 - cctx->L);
1160 cctx->iv_set = 1;
1161 }
1162 return 1;
1163 }
1164
17f121de 1165static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
23916810
DSH		 1166 const unsigned char *in, size_t len)
1167 {
1168 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1169 CCM128_CONTEXT *ccm = &cctx->ccm;
1170 /* If not set up, return error */
1171 if (!cctx->iv_set && !cctx->key_set)
1172 return -1;
1173 if (!ctx->encrypt && !cctx->tag_set)
1174 return -1;
1175 if (!out)
1176 {
1177 if (!in)
1178 {
1179 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
1180 return -1;
1181 cctx->len_set = 1;
1182 return len;
1183 }
1184 /* If have AAD need message length */
1185 if (!cctx->len_set && len)
1186 return -1;
1187 CRYPTO_ccm128_aad(ccm, in, len);
1188 return len;
1189 }
1190 /* EVP_*Final() doesn't return any data */
1191 if (!in)
1192 return 0;
1193 /* If not set length yet do it */
1194 if (!cctx->len_set)
1195 {
1196 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1197 return -1;
1198 cctx->len_set = 1;
1199 }
1200 if (ctx->encrypt)
1201 {
1202 if (CRYPTO_ccm128_encrypt(ccm, in, out, len))
1203 return -1;
1204 cctx->tag_set = 1;
1205 return len;
1206 }
1207 else
1208 {
1209 int rv = -1;
1210 if (!CRYPTO_ccm128_decrypt(ccm, in, out, len))
1211 {
1212 unsigned char tag[16];
b5dd1787 1213 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
23916810
DSH		 1214 {
1215 if (!memcmp(tag, ctx->buf, cctx->M))
1216 rv = len;
1217 }
1218 }
1219 if (rv == -1)
1220 OPENSSL_cleanse(out, len);
1221 cctx->iv_set = 0;
1222 cctx->tag_set = 0;
1223 cctx->len_set = 0;
1224 return rv;
1225 }
1226
1227 }
1228
17f121de
AP		 1229#define aes_ccm_cleanup NULL
1230
1231BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1232BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1233BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
23916810 1234
77dd9c18 1235#endif
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