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 union { double align; AES_KEY ks; } 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 union { double align; AES_KEY ks; } 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 union { double align; AES_KEY ks; } 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 union { double align; AES_KEY ks; } 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[];
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 (OPENSSL_ia32cap_P[1]&(1<<(41-32)))
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
aesni_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)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
aesni_cbc_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)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
aesni_ecb_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)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
aesni_gcm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)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.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
aesni_xts_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)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.ks);
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.ks);
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.ks);
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
aesni_ccm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)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.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 #if defined(OPENSSL_CPUID_OBJ) && (defined(__arm__) || defined(__arm) || defined(__aarch64__))
488 #include "arm_arch.h"
489 #if __ARM_ARCH__>=7
490 # if defined(BSAES_ASM)
491 # define BSAES_CAPABLE (OPENSSL_armcap_P & ARMV7_NEON)
492 # endif
493 # define HWAES_CAPABLE (OPENSSL_armcap_P & ARMV8_AES)
494 # define HWAES_set_encrypt_key aes_v8_set_encrypt_key
495 # define HWAES_set_decrypt_key aes_v8_set_decrypt_key
496 # define HWAES_encrypt aes_v8_encrypt
497 # define HWAES_decrypt aes_v8_decrypt
498 # define HWAES_cbc_encrypt aes_v8_cbc_encrypt
499 # define HWAES_ctr32_encrypt_blocks aes_v8_ctr32_encrypt_blocks
500 #endif
501 #endif
502
503 #if defined(HWAES_CAPABLE)
504 int HWAES_set_encrypt_key(const unsigned char *userKey, const int bits,
505 AES_KEY *key);
506 int HWAES_set_decrypt_key(const unsigned char *userKey, const int bits,
507 AES_KEY *key);
508 void HWAES_encrypt(const unsigned char *in, unsigned char *out,
509 const AES_KEY *key);
510 void HWAES_decrypt(const unsigned char *in, unsigned char *out,
511 const AES_KEY *key);
512 void HWAES_cbc_encrypt(const unsigned char *in, unsigned char *out,
513 size_t length, const AES_KEY *key,
514 unsigned char *ivec, const int enc);
515 void HWAES_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
516 size_t len, const AES_KEY *key, const unsigned char ivec[16]);
517 #endif
518
519 #define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \
520 BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
521 BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
522 BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
523 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
524 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \
525 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \
526 BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
527
aes_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)528 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
529 const unsigned char *iv, int enc)
530 {
531 int ret, mode;
532 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
533
534 mode = ctx->cipher->flags & EVP_CIPH_MODE;
535 if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
536 && !enc)
537 #ifdef HWAES_CAPABLE
538 if (HWAES_CAPABLE)
539 {
540 ret = HWAES_set_decrypt_key(key,ctx->key_len*8,&dat->ks.ks);
541 dat->block = (block128_f)HWAES_decrypt;
542 dat->stream.cbc = NULL;
543 #ifdef HWAES_cbc_encrypt
544 if (mode==EVP_CIPH_CBC_MODE)
545 dat->stream.cbc = (cbc128_f)HWAES_cbc_encrypt;
546 #endif
547 }
548 else
549 #endif
550 #ifdef BSAES_CAPABLE
551 if (BSAES_CAPABLE && mode==EVP_CIPH_CBC_MODE)
552 {
553 ret = AES_set_decrypt_key(key,ctx->key_len*8,&dat->ks.ks);
554 dat->block = (block128_f)AES_decrypt;
555 dat->stream.cbc = (cbc128_f)bsaes_cbc_encrypt;
556 }
557 else
558 #endif
559 #ifdef VPAES_CAPABLE
560 if (VPAES_CAPABLE)
561 {
562 ret = vpaes_set_decrypt_key(key,ctx->key_len*8,&dat->ks.ks);
563 dat->block = (block128_f)vpaes_decrypt;
564 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
565 (cbc128_f)vpaes_cbc_encrypt :
566 NULL;
567 }
568 else
569 #endif
570 {
571 ret = AES_set_decrypt_key(key,ctx->key_len*8,&dat->ks.ks);
572 dat->block = (block128_f)AES_decrypt;
573 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
574 (cbc128_f)AES_cbc_encrypt :
575 NULL;
576 }
577 else
578 #ifdef HWAES_CAPABLE
579 if (HWAES_CAPABLE)
580 {
581 ret = HWAES_set_encrypt_key(key,ctx->key_len*8,&dat->ks.ks);
582 dat->block = (block128_f)HWAES_encrypt;
583 dat->stream.cbc = NULL;
584 #ifdef HWAES_cbc_encrypt
585 if (mode==EVP_CIPH_CBC_MODE)
586 dat->stream.cbc = (cbc128_f)HWAES_cbc_encrypt;
587 else
588 #endif
589 #ifdef HWAES_ctr32_encrypt_blocks
590 if (mode==EVP_CIPH_CTR_MODE)
591 dat->stream.ctr = (ctr128_f)HWAES_ctr32_encrypt_blocks;
592 else
593 #endif
594 (void)0; /* terminate potentially open 'else' */
595 }
596 else
597 #endif
598 #ifdef BSAES_CAPABLE
599 if (BSAES_CAPABLE && mode==EVP_CIPH_CTR_MODE)
600 {
601 ret = AES_set_encrypt_key(key,ctx->key_len*8,&dat->ks.ks);
602 dat->block = (block128_f)AES_encrypt;
603 dat->stream.ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks;
604 }
605 else
606 #endif
607 #ifdef VPAES_CAPABLE
608 if (VPAES_CAPABLE)
609 {
610 ret = vpaes_set_encrypt_key(key,ctx->key_len*8,&dat->ks.ks);
611 dat->block = (block128_f)vpaes_encrypt;
612 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
613 (cbc128_f)vpaes_cbc_encrypt :
614 NULL;
615 }
616 else
617 #endif
618 {
619 ret = AES_set_encrypt_key(key,ctx->key_len*8,&dat->ks.ks);
620 dat->block = (block128_f)AES_encrypt;
621 dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ?
622 (cbc128_f)AES_cbc_encrypt :
623 NULL;
624 #ifdef AES_CTR_ASM
625 if (mode==EVP_CIPH_CTR_MODE)
626 dat->stream.ctr = (ctr128_f)AES_ctr32_encrypt;
627 #endif
628 }
629
630 if(ret < 0)
631 {
632 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
633 return 0;
634 }
635
636 return 1;
637 }
638
aes_cbc_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)639 static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
640 const unsigned char *in, size_t len)
641 {
642 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
643
644 if (dat->stream.cbc)
645 (*dat->stream.cbc)(in,out,len,&dat->ks,ctx->iv,ctx->encrypt);
646 else if (ctx->encrypt)
647 CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block);
648 else
649 CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block);
650
651 return 1;
652 }
653
aes_ecb_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)654 static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
655 const unsigned char *in, size_t len)
656 {
657 size_t bl = ctx->cipher->block_size;
658 size_t i;
659 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
660
661 if (len<bl) return 1;
662
663 for (i=0,len-=bl;i<=len;i+=bl)
664 (*dat->block)(in+i,out+i,&dat->ks);
665
666 return 1;
667 }
668
aes_ofb_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)669 static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
670 const unsigned char *in,size_t len)
671 {
672 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
673
674 CRYPTO_ofb128_encrypt(in,out,len,&dat->ks,
675 ctx->iv,&ctx->num,dat->block);
676 return 1;
677 }
678
aes_cfb_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)679 static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
680 const unsigned char *in,size_t len)
681 {
682 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
683
684 CRYPTO_cfb128_encrypt(in,out,len,&dat->ks,
685 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
686 return 1;
687 }
688
aes_cfb8_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)689 static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
690 const unsigned char *in,size_t len)
691 {
692 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
693
694 CRYPTO_cfb128_8_encrypt(in,out,len,&dat->ks,
695 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
696 return 1;
697 }
698
aes_cfb1_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)699 static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
700 const unsigned char *in,size_t len)
701 {
702 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
703
704 if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
705 CRYPTO_cfb128_1_encrypt(in,out,len,&dat->ks,
706 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
707 return 1;
708 }
709
710 while (len>=MAXBITCHUNK) {
711 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,&dat->ks,
712 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
713 len-=MAXBITCHUNK;
714 }
715 if (len)
716 CRYPTO_cfb128_1_encrypt(in,out,len*8,&dat->ks,
717 ctx->iv,&ctx->num,ctx->encrypt,dat->block);
718
719 return 1;
720 }
721
aes_ctr_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)722 static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
723 const unsigned char *in, size_t len)
724 {
725 unsigned int num = ctx->num;
726 EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
727
728 if (dat->stream.ctr)
729 CRYPTO_ctr128_encrypt_ctr32(in,out,len,&dat->ks,
730 ctx->iv,ctx->buf,&num,dat->stream.ctr);
731 else
732 CRYPTO_ctr128_encrypt(in,out,len,&dat->ks,
733 ctx->iv,ctx->buf,&num,dat->block);
734 ctx->num = (size_t)num;
735 return 1;
736 }
737
738 BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS)
739 BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS)
740 BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS)
741
aes_gcm_cleanup(EVP_CIPHER_CTX * c)742 static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
743 {
744 EVP_AES_GCM_CTX *gctx = c->cipher_data;
745 OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
746 if (gctx->iv != c->iv)
747 OPENSSL_free(gctx->iv);
748 return 1;
749 }
750
751 /* increment counter (64-bit int) by 1 */
ctr64_inc(unsigned char * counter)752 static void ctr64_inc(unsigned char *counter) {
753 int n=8;
754 unsigned char c;
755
756 do {
757 --n;
758 c = counter[n];
759 ++c;
760 counter[n] = c;
761 if (c) return;
762 } while (n);
763 }
764
aes_gcm_ctrl(EVP_CIPHER_CTX * c,int type,int arg,void * ptr)765 static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
766 {
767 EVP_AES_GCM_CTX *gctx = c->cipher_data;
768 switch (type)
769 {
770 case EVP_CTRL_INIT:
771 gctx->key_set = 0;
772 gctx->iv_set = 0;
773 gctx->ivlen = c->cipher->iv_len;
774 gctx->iv = c->iv;
775 gctx->taglen = -1;
776 gctx->iv_gen = 0;
777 gctx->tls_aad_len = -1;
778 return 1;
779
780 case EVP_CTRL_GCM_SET_IVLEN:
781 if (arg <= 0)
782 return 0;
783 #ifdef OPENSSL_FIPS
784 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
785 && arg < 12)
786 return 0;
787 #endif
788 /* Allocate memory for IV if needed */
789 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
790 {
791 if (gctx->iv != c->iv)
792 OPENSSL_free(gctx->iv);
793 gctx->iv = OPENSSL_malloc(arg);
794 if (!gctx->iv)
795 return 0;
796 }
797 gctx->ivlen = arg;
798 return 1;
799
800 case EVP_CTRL_GCM_SET_TAG:
801 if (arg <= 0 || arg > 16 || c->encrypt)
802 return 0;
803 memcpy(c->buf, ptr, arg);
804 gctx->taglen = arg;
805 return 1;
806
807 case EVP_CTRL_GCM_GET_TAG:
808 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
809 return 0;
810 memcpy(ptr, c->buf, arg);
811 return 1;
812
813 case EVP_CTRL_GCM_SET_IV_FIXED:
814 /* Special case: -1 length restores whole IV */
815 if (arg == -1)
816 {
817 memcpy(gctx->iv, ptr, gctx->ivlen);
818 gctx->iv_gen = 1;
819 return 1;
820 }
821 /* Fixed field must be at least 4 bytes and invocation field
822 * at least 8.
823 */
824 if ((arg < 4) || (gctx->ivlen - arg) < 8)
825 return 0;
826 if (arg)
827 memcpy(gctx->iv, ptr, arg);
828 if (c->encrypt &&
829 RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
830 return 0;
831 gctx->iv_gen = 1;
832 return 1;
833
834 case EVP_CTRL_GCM_IV_GEN:
835 if (gctx->iv_gen == 0 || gctx->key_set == 0)
836 return 0;
837 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
838 if (arg <= 0 || arg > gctx->ivlen)
839 arg = gctx->ivlen;
840 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
841 /* Invocation field will be at least 8 bytes in size and
842 * so no need to check wrap around or increment more than
843 * last 8 bytes.
844 */
845 ctr64_inc(gctx->iv + gctx->ivlen - 8);
846 gctx->iv_set = 1;
847 return 1;
848
849 case EVP_CTRL_GCM_SET_IV_INV:
850 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
851 return 0;
852 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
853 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
854 gctx->iv_set = 1;
855 return 1;
856
857 case EVP_CTRL_AEAD_TLS1_AAD:
858 /* Save the AAD for later use */
859 if (arg != 13)
860 return 0;
861 memcpy(c->buf, ptr, arg);
862 gctx->tls_aad_len = arg;
863 {
864 unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1];
865 /* Correct length for explicit IV */
866 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
867 /* If decrypting correct for tag too */
868 if (!c->encrypt)
869 len -= EVP_GCM_TLS_TAG_LEN;
870 c->buf[arg-2] = len>>8;
871 c->buf[arg-1] = len & 0xff;
872 }
873 /* Extra padding: tag appended to record */
874 return EVP_GCM_TLS_TAG_LEN;
875
876 case EVP_CTRL_COPY:
877 {
878 EVP_CIPHER_CTX *out = ptr;
879 EVP_AES_GCM_CTX *gctx_out = out->cipher_data;
880 if (gctx->gcm.key)
881 {
882 if (gctx->gcm.key != &gctx->ks)
883 return 0;
884 gctx_out->gcm.key = &gctx_out->ks;
885 }
886 if (gctx->iv == c->iv)
887 gctx_out->iv = out->iv;
888 else
889 {
890 gctx_out->iv = OPENSSL_malloc(gctx->ivlen);
891 if (!gctx_out->iv)
892 return 0;
893 memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
894 }
895 return 1;
896 }
897
898 default:
899 return -1;
900
901 }
902 }
903
aes_gcm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)904 static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
905 const unsigned char *iv, int enc)
906 {
907 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
908 if (!iv && !key)
909 return 1;
910 if (key)
911 { do {
912 #ifdef HWAES_CAPABLE
913 if (HWAES_CAPABLE)
914 {
915 HWAES_set_encrypt_key(key,ctx->key_len*8,&gctx->ks.ks);
916 CRYPTO_gcm128_init(&gctx->gcm,&gctx->ks,
917 (block128_f)HWAES_encrypt);
918 #ifdef HWAES_ctr32_encrypt_blocks
919 gctx->ctr = (ctr128_f)HWAES_ctr32_encrypt_blocks;
920 #else
921 gctx->ctr = NULL;
922 #endif
923 break;
924 }
925 else
926 #endif
927 #ifdef BSAES_CAPABLE
928 if (BSAES_CAPABLE)
929 {
930 AES_set_encrypt_key(key,ctx->key_len*8,&gctx->ks.ks);
931 CRYPTO_gcm128_init(&gctx->gcm,&gctx->ks,
932 (block128_f)AES_encrypt);
933 gctx->ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks;
934 break;
935 }
936 else
937 #endif
938 #ifdef VPAES_CAPABLE
939 if (VPAES_CAPABLE)
940 {
941 vpaes_set_encrypt_key(key,ctx->key_len*8,&gctx->ks.ks);
942 CRYPTO_gcm128_init(&gctx->gcm,&gctx->ks,
943 (block128_f)vpaes_encrypt);
944 gctx->ctr = NULL;
945 break;
946 }
947 else
948 #endif
949 (void)0; /* terminate potentially open 'else' */
950
951 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks.ks);
952 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
953 #ifdef AES_CTR_ASM
954 gctx->ctr = (ctr128_f)AES_ctr32_encrypt;
955 #else
956 gctx->ctr = NULL;
957 #endif
958 } while (0);
959
960 /* If we have an iv can set it directly, otherwise use
961 * saved IV.
962 */
963 if (iv == NULL && gctx->iv_set)
964 iv = gctx->iv;
965 if (iv)
966 {
967 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
968 gctx->iv_set = 1;
969 }
970 gctx->key_set = 1;
971 }
972 else
973 {
974 /* If key set use IV, otherwise copy */
975 if (gctx->key_set)
976 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
977 else
978 memcpy(gctx->iv, iv, gctx->ivlen);
979 gctx->iv_set = 1;
980 gctx->iv_gen = 0;
981 }
982 return 1;
983 }
984
985 /* Handle TLS GCM packet format. This consists of the last portion of the IV
986 * followed by the payload and finally the tag. On encrypt generate IV,
987 * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
988 * and verify tag.
989 */
990
aes_gcm_tls_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)991 static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
992 const unsigned char *in, size_t len)
993 {
994 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
995 int rv = -1;
996 /* Encrypt/decrypt must be performed in place */
997 if (out != in || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN+EVP_GCM_TLS_TAG_LEN))
998 return -1;
999 /* Set IV from start of buffer or generate IV and write to start
1000 * of buffer.
1001 */
1002 if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
1003 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
1004 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
1005 goto err;
1006 /* Use saved AAD */
1007 if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
1008 goto err;
1009 /* Fix buffer and length to point to payload */
1010 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
1011 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
1012 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
1013 if (ctx->encrypt)
1014 {
1015 /* Encrypt payload */
1016 if (gctx->ctr)
1017 {
1018 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
1019 in, out, len,
1020 gctx->ctr))
1021 goto err;
1022 }
1023 else {
1024 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
1025 goto err;
1026 }
1027 out += len;
1028 /* Finally write tag */
1029 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
1030 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
1031 }
1032 else
1033 {
1034 /* Decrypt */
1035 if (gctx->ctr)
1036 {
1037 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
1038 in, out, len,
1039 gctx->ctr))
1040 goto err;
1041 }
1042 else {
1043 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1044 goto err;
1045 }
1046 /* Retrieve tag */
1047 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
1048 EVP_GCM_TLS_TAG_LEN);
1049 /* If tag mismatch wipe buffer */
1050 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
1051 {
1052 OPENSSL_cleanse(out, len);
1053 goto err;
1054 }
1055 rv = len;
1056 }
1057
1058 err:
1059 gctx->iv_set = 0;
1060 gctx->tls_aad_len = -1;
1061 return rv;
1062 }
1063
aes_gcm_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)1064 static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1065 const unsigned char *in, size_t len)
1066 {
1067 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
1068 /* If not set up, return error */
1069 if (!gctx->key_set)
1070 return -1;
1071
1072 if (gctx->tls_aad_len >= 0)
1073 return aes_gcm_tls_cipher(ctx, out, in, len);
1074
1075 if (!gctx->iv_set)
1076 return -1;
1077 if (in)
1078 {
1079 if (out == NULL)
1080 {
1081 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
1082 return -1;
1083 }
1084 else if (ctx->encrypt)
1085 {
1086 if (gctx->ctr)
1087 {
1088 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
1089 in, out, len,
1090 gctx->ctr))
1091 return -1;
1092 }
1093 else {
1094 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
1095 return -1;
1096 }
1097 }
1098 else
1099 {
1100 if (gctx->ctr)
1101 {
1102 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
1103 in, out, len,
1104 gctx->ctr))
1105 return -1;
1106 }
1107 else {
1108 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1109 return -1;
1110 }
1111 }
1112 return len;
1113 }
1114 else
1115 {
1116 if (!ctx->encrypt)
1117 {
1118 if (gctx->taglen < 0)
1119 return -1;
1120 if (CRYPTO_gcm128_finish(&gctx->gcm,
1121 ctx->buf, gctx->taglen) != 0)
1122 return -1;
1123 gctx->iv_set = 0;
1124 return 0;
1125 }
1126 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
1127 gctx->taglen = 16;
1128 /* Don't reuse the IV */
1129 gctx->iv_set = 0;
1130 return 0;
1131 }
1132
1133 }
1134
1135 #define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
1136 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
1137 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
1138 | EVP_CIPH_CUSTOM_COPY)
1139
1140 BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM,
1141 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1142 BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM,
1143 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1144 BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM,
1145 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1146
aes_xts_ctrl(EVP_CIPHER_CTX * c,int type,int arg,void * ptr)1147 static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1148 {
1149 EVP_AES_XTS_CTX *xctx = c->cipher_data;
1150 if (type == EVP_CTRL_COPY)
1151 {
1152 EVP_CIPHER_CTX *out = ptr;
1153 EVP_AES_XTS_CTX *xctx_out = out->cipher_data;
1154 if (xctx->xts.key1)
1155 {
1156 if (xctx->xts.key1 != &xctx->ks1)
1157 return 0;
1158 xctx_out->xts.key1 = &xctx_out->ks1;
1159 }
1160 if (xctx->xts.key2)
1161 {
1162 if (xctx->xts.key2 != &xctx->ks2)
1163 return 0;
1164 xctx_out->xts.key2 = &xctx_out->ks2;
1165 }
1166 return 1;
1167 }
1168 else if (type != EVP_CTRL_INIT)
1169 return -1;
1170 /* key1 and key2 are used as an indicator both key and IV are set */
1171 xctx->xts.key1 = NULL;
1172 xctx->xts.key2 = NULL;
1173 return 1;
1174 }
1175
aes_xts_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)1176 static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1177 const unsigned char *iv, int enc)
1178 {
1179 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1180 if (!iv && !key)
1181 return 1;
1182
1183 if (key) do
1184 {
1185 #ifdef AES_XTS_ASM
1186 xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt;
1187 #else
1188 xctx->stream = NULL;
1189 #endif
1190 /* key_len is two AES keys */
1191 #ifdef HWAES_CAPABLE
1192 if (HWAES_CAPABLE)
1193 {
1194 if (enc)
1195 {
1196 HWAES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
1197 xctx->xts.block1 = (block128_f)HWAES_encrypt;
1198 }
1199 else
1200 {
1201 HWAES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
1202 xctx->xts.block1 = (block128_f)HWAES_decrypt;
1203 }
1204
1205 HWAES_set_encrypt_key(key + ctx->key_len/2,
1206 ctx->key_len * 4, &xctx->ks2.ks);
1207 xctx->xts.block2 = (block128_f)HWAES_encrypt;
1208
1209 xctx->xts.key1 = &xctx->ks1;
1210 break;
1211 }
1212 else
1213 #endif
1214 #ifdef BSAES_CAPABLE
1215 if (BSAES_CAPABLE)
1216 xctx->stream = enc ? bsaes_xts_encrypt : bsaes_xts_decrypt;
1217 else
1218 #endif
1219 #ifdef VPAES_CAPABLE
1220 if (VPAES_CAPABLE)
1221 {
1222 if (enc)
1223 {
1224 vpaes_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
1225 xctx->xts.block1 = (block128_f)vpaes_encrypt;
1226 }
1227 else
1228 {
1229 vpaes_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
1230 xctx->xts.block1 = (block128_f)vpaes_decrypt;
1231 }
1232
1233 vpaes_set_encrypt_key(key + ctx->key_len/2,
1234 ctx->key_len * 4, &xctx->ks2.ks);
1235 xctx->xts.block2 = (block128_f)vpaes_encrypt;
1236
1237 xctx->xts.key1 = &xctx->ks1;
1238 break;
1239 }
1240 else
1241 #endif
1242 (void)0; /* terminate potentially open 'else' */
1243
1244 if (enc)
1245 {
1246 AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
1247 xctx->xts.block1 = (block128_f)AES_encrypt;
1248 }
1249 else
1250 {
1251 AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
1252 xctx->xts.block1 = (block128_f)AES_decrypt;
1253 }
1254
1255 AES_set_encrypt_key(key + ctx->key_len/2,
1256 ctx->key_len * 4, &xctx->ks2.ks);
1257 xctx->xts.block2 = (block128_f)AES_encrypt;
1258
1259 xctx->xts.key1 = &xctx->ks1;
1260 } while (0);
1261
1262 if (iv)
1263 {
1264 xctx->xts.key2 = &xctx->ks2;
1265 memcpy(ctx->iv, iv, 16);
1266 }
1267
1268 return 1;
1269 }
1270
aes_xts_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)1271 static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1272 const unsigned char *in, size_t len)
1273 {
1274 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1275 if (!xctx->xts.key1 || !xctx->xts.key2)
1276 return 0;
1277 if (!out || !in || len<AES_BLOCK_SIZE)
1278 return 0;
1279 #ifdef OPENSSL_FIPS
1280 /* Requirement of SP800-38E */
1281 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
1282 (len > (1UL<<20)*16))
1283 {
1284 EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE);
1285 return 0;
1286 }
1287 #endif
1288 if (xctx->stream)
1289 (*xctx->stream)(in, out, len,
1290 xctx->xts.key1, xctx->xts.key2, ctx->iv);
1291 else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1292 ctx->encrypt))
1293 return 0;
1294 return 1;
1295 }
1296
1297 #define aes_xts_cleanup NULL
1298
1299 #define XTS_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV \
1300 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
1301 | EVP_CIPH_CUSTOM_COPY)
1302
1303 BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|XTS_FLAGS)
1304 BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|XTS_FLAGS)
1305
aes_ccm_ctrl(EVP_CIPHER_CTX * c,int type,int arg,void * ptr)1306 static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1307 {
1308 EVP_AES_CCM_CTX *cctx = c->cipher_data;
1309 switch (type)
1310 {
1311 case EVP_CTRL_INIT:
1312 cctx->key_set = 0;
1313 cctx->iv_set = 0;
1314 cctx->L = 8;
1315 cctx->M = 12;
1316 cctx->tag_set = 0;
1317 cctx->len_set = 0;
1318 return 1;
1319
1320 case EVP_CTRL_CCM_SET_IVLEN:
1321 arg = 15 - arg;
1322 case EVP_CTRL_CCM_SET_L:
1323 if (arg < 2 || arg > 8)
1324 return 0;
1325 cctx->L = arg;
1326 return 1;
1327
1328 case EVP_CTRL_CCM_SET_TAG:
1329 if ((arg & 1) || arg < 4 || arg > 16)
1330 return 0;
1331 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1332 return 0;
1333 if (ptr)
1334 {
1335 cctx->tag_set = 1;
1336 memcpy(c->buf, ptr, arg);
1337 }
1338 cctx->M = arg;
1339 return 1;
1340
1341 case EVP_CTRL_CCM_GET_TAG:
1342 if (!c->encrypt || !cctx->tag_set)
1343 return 0;
1344 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
1345 return 0;
1346 cctx->tag_set = 0;
1347 cctx->iv_set = 0;
1348 cctx->len_set = 0;
1349 return 1;
1350
1351 case EVP_CTRL_COPY:
1352 {
1353 EVP_CIPHER_CTX *out = ptr;
1354 EVP_AES_CCM_CTX *cctx_out = out->cipher_data;
1355 if (cctx->ccm.key)
1356 {
1357 if (cctx->ccm.key != &cctx->ks)
1358 return 0;
1359 cctx_out->ccm.key = &cctx_out->ks;
1360 }
1361 return 1;
1362 }
1363
1364 default:
1365 return -1;
1366
1367 }
1368 }
1369
aes_ccm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)1370 static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1371 const unsigned char *iv, int enc)
1372 {
1373 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1374 if (!iv && !key)
1375 return 1;
1376 if (key) do
1377 {
1378 #ifdef HWAES_CAPABLE
1379 if (HWAES_CAPABLE)
1380 {
1381 HWAES_set_encrypt_key(key,ctx->key_len*8,&cctx->ks.ks);
1382
1383 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1384 &cctx->ks, (block128_f)HWAES_encrypt);
1385 cctx->str = NULL;
1386 cctx->key_set = 1;
1387 break;
1388 }
1389 else
1390 #endif
1391 #ifdef VPAES_CAPABLE
1392 if (VPAES_CAPABLE)
1393 {
1394 vpaes_set_encrypt_key(key, ctx->key_len*8, &cctx->ks.ks);
1395 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1396 &cctx->ks, (block128_f)vpaes_encrypt);
1397 cctx->str = NULL;
1398 cctx->key_set = 1;
1399 break;
1400 }
1401 #endif
1402 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks.ks);
1403 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1404 &cctx->ks, (block128_f)AES_encrypt);
1405 cctx->str = NULL;
1406 cctx->key_set = 1;
1407 } while (0);
1408 if (iv)
1409 {
1410 memcpy(ctx->iv, iv, 15 - cctx->L);
1411 cctx->iv_set = 1;
1412 }
1413 return 1;
1414 }
1415
aes_ccm_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)1416 static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1417 const unsigned char *in, size_t len)
1418 {
1419 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1420 CCM128_CONTEXT *ccm = &cctx->ccm;
1421 /* If not set up, return error */
1422 if (!cctx->iv_set && !cctx->key_set)
1423 return -1;
1424 if (!ctx->encrypt && !cctx->tag_set)
1425 return -1;
1426 if (!out)
1427 {
1428 if (!in)
1429 {
1430 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
1431 return -1;
1432 cctx->len_set = 1;
1433 return len;
1434 }
1435 /* If have AAD need message length */
1436 if (!cctx->len_set && len)
1437 return -1;
1438 CRYPTO_ccm128_aad(ccm, in, len);
1439 return len;
1440 }
1441 /* EVP_*Final() doesn't return any data */
1442 if (!in)
1443 return 0;
1444 /* If not set length yet do it */
1445 if (!cctx->len_set)
1446 {
1447 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1448 return -1;
1449 cctx->len_set = 1;
1450 }
1451 if (ctx->encrypt)
1452 {
1453 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
1454 cctx->str) :
1455 CRYPTO_ccm128_encrypt(ccm, in, out, len))
1456 return -1;
1457 cctx->tag_set = 1;
1458 return len;
1459 }
1460 else
1461 {
1462 int rv = -1;
1463 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
1464 cctx->str) :
1465 !CRYPTO_ccm128_decrypt(ccm, in, out, len))
1466 {
1467 unsigned char tag[16];
1468 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
1469 {
1470 if (!memcmp(tag, ctx->buf, cctx->M))
1471 rv = len;
1472 }
1473 }
1474 if (rv == -1)
1475 OPENSSL_cleanse(out, len);
1476 cctx->iv_set = 0;
1477 cctx->tag_set = 0;
1478 cctx->len_set = 0;
1479 return rv;
1480 }
1481
1482 }
1483
1484 #define aes_ccm_cleanup NULL
1485
1486 BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1487 BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1488 BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1489
1490 #endif
1491 #endif
1492