1 /* ====================================================================
2 * Copyright (c) 2001-2011 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
51 #include <openssl/opensslconf.h>
52 #ifndef OPENSSL_NO_AES
53 #include <openssl/evp.h>
54 #include <openssl/err.h>
57 #include <openssl/aes.h>
60 #include "modes_lcl.h"
61 #include <openssl/rand.h>
70 AES_KEY ks; /* AES key schedule to use */
71 int key_set; /* Set if key initialised */
72 int iv_set; /* Set if an iv is set */
74 unsigned char *iv; /* Temporary IV store */
75 int ivlen; /* IV length */
77 int iv_gen; /* It is OK to generate IVs */
78 int tls_aad_len; /* TLS AAD length */
83 AES_KEY ks1, ks2; /* AES key schedules to use */
89 AES_KEY ks; /* AES key schedule to use */
90 int key_set; /* Set if key initialised */
91 int iv_set; /* Set if an iv is set */
92 int tag_set; /* Set if tag is valid */
93 int len_set; /* Set if message length set */
94 int L, M; /* L and M parameters from RFC3610 */
98 #define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4))
100 #if defined(AES_ASM) && !defined(I386_ONLY) && ( \
101 ((defined(__i386) || defined(__i386__) || \
102 defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
103 defined(__x86_64) || defined(__x86_64__) || \
104 defined(_M_AMD64) || defined(_M_X64) || \
109 extern unsigned int OPENSSL_ia32cap_P[2];
110 #define AESNI_CAPABLE (1<<(57-32))
112 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
114 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
117 void aesni_encrypt(const unsigned char *in, unsigned char *out,
119 void aesni_decrypt(const unsigned char *in, unsigned char *out,
122 void aesni_ecb_encrypt(const unsigned char *in,
127 void aesni_cbc_encrypt(const unsigned char *in,
131 unsigned char *ivec, int enc);
133 void aesni_ctr32_encrypt_blocks(const unsigned char *in,
137 const unsigned char *ivec);
139 void aesni_xts_encrypt(const unsigned char *in,
142 const AES_KEY *key1, const AES_KEY *key2,
143 const unsigned char iv[16]);
145 void aesni_xts_decrypt(const unsigned char *in,
148 const AES_KEY *key1, const AES_KEY *key2,
149 const unsigned char iv[16]);
151 void aesni_ccm64_encrypt_blocks (const unsigned char *in,
155 const unsigned char ivec[16],
156 unsigned char cmac[16]);
158 void aesni_ccm64_decrypt_blocks (const unsigned char *in,
162 const unsigned char ivec[16],
163 unsigned char cmac[16]);
165 static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
166 const unsigned char *iv, int enc)
170 if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
171 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
173 ret = aesni_set_decrypt_key(key, ctx->key_len*8, ctx->cipher_data);
175 ret = aesni_set_encrypt_key(key, ctx->key_len*8, ctx->cipher_data);
179 EVPerr(EVP_F_AESNI_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
186 static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
187 const unsigned char *in, size_t len)
189 aesni_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
194 static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
195 const unsigned char *in, size_t len)
197 size_t bl = ctx->cipher->block_size;
199 if (len<bl) return 1;
201 aesni_ecb_encrypt(in,out,len,ctx->cipher_data,ctx->encrypt);
206 static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
207 const unsigned char *in,size_t len)
209 CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
211 (block128_f)aesni_encrypt);
215 static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
216 const unsigned char *in,size_t len)
218 CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
219 ctx->iv,&ctx->num,ctx->encrypt,
220 (block128_f)aesni_encrypt);
224 static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
225 const unsigned char *in,size_t len)
227 CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
228 ctx->iv,&ctx->num,ctx->encrypt,
229 (block128_f)aesni_encrypt);
233 static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
234 const unsigned char *in,size_t len)
236 if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
237 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
238 ctx->iv,&ctx->num,ctx->encrypt,
239 (block128_f)aesni_encrypt);
243 while (len>=MAXBITCHUNK) {
244 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
245 ctx->iv,&ctx->num,ctx->encrypt,
246 (block128_f)aesni_encrypt);
250 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
251 ctx->iv,&ctx->num,ctx->encrypt,
252 (block128_f)aesni_encrypt);
257 static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
258 const unsigned char *in, size_t len)
263 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
264 ctx->cipher_data,ctx->iv,ctx->buf,&num,
265 (ctr128_f)aesni_ctr32_encrypt_blocks);
267 ctx->num = (size_t)num;
271 static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
272 const unsigned char *iv, int enc)
274 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
279 aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
280 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
281 (block128_f)aesni_encrypt);
282 /* If we have an iv can set it directly, otherwise use
285 if (iv == NULL && gctx->iv_set)
289 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
296 /* If key set use IV, otherwise copy */
298 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
300 memcpy(gctx->iv, iv, gctx->ivlen);
307 /* Handle TLS GCM packet format. This consists of the last portion of the IV
308 * followed by the payload and finally the tag. On encrypt generate IV,
309 * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
313 static int aesni_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
314 const unsigned char *in, size_t len)
316 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
318 /* Encrypt/decrypt must be performed in place */
321 /* Set IV from start of buffer or generate IV and write to start
324 if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
325 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
326 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
329 if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
331 /* Fix buffer and length to point to payload */
332 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
333 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
334 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
337 /* Encrypt payload */
338 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, in, out, len,
339 aesni_ctr32_encrypt_blocks))
341 /* Finally write tag */
342 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
343 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
348 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, in, out, len,
349 aesni_ctr32_encrypt_blocks))
352 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
353 EVP_GCM_TLS_TAG_LEN);
354 /* If tag mismatch wipe buffer */
355 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
357 OPENSSL_cleanse(out, len);
365 gctx->tls_aad_len = -1;
369 static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
370 const unsigned char *in, size_t len)
372 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
373 /* If not set up, return error */
377 if (gctx->tls_aad_len >= 0)
378 return aesni_gcm_tls_cipher(ctx, out, in, len);
382 if (!ctx->encrypt && gctx->taglen < 0)
388 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
391 else if (ctx->encrypt)
393 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
395 aesni_ctr32_encrypt_blocks))
400 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
402 aesni_ctr32_encrypt_blocks))
411 if (CRYPTO_gcm128_finish(&gctx->gcm,
412 ctx->buf, gctx->taglen) != 0)
417 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
419 /* Don't reuse the IV */
426 static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
427 const unsigned char *iv, int enc)
429 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
435 /* key_len is two AES keys */
438 aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
439 xctx->xts.block1 = (block128_f)aesni_encrypt;
443 aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
444 xctx->xts.block1 = (block128_f)aesni_decrypt;
447 aesni_set_encrypt_key(key + ctx->key_len/2,
448 ctx->key_len * 4, &xctx->ks2);
449 xctx->xts.block2 = (block128_f)aesni_encrypt;
451 xctx->xts.key1 = &xctx->ks1;
456 xctx->xts.key2 = &xctx->ks2;
457 memcpy(ctx->iv, iv, 16);
463 static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
464 const unsigned char *in, size_t len)
466 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
467 if (!xctx->xts.key1 || !xctx->xts.key2)
472 /* Requirement of SP800-38E */
473 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
476 EVPerr(EVPNI_F_AES_XTS, EVP_R_TOO_LARGE);
481 aesni_xts_encrypt(in, out, len,
482 xctx->xts.key1, xctx->xts.key2, ctx->iv);
484 aesni_xts_decrypt(in, out, len,
485 xctx->xts.key1, xctx->xts.key2, ctx->iv);
490 static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
491 const unsigned char *iv, int enc)
493 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
498 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
499 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
500 &cctx->ks, (block128_f)aesni_encrypt);
505 memcpy(ctx->iv, iv, 15 - cctx->L);
511 static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
512 const unsigned char *in, size_t len)
514 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
515 CCM128_CONTEXT *ccm = &cctx->ccm;
516 /* If not set up, return error */
517 if (!cctx->iv_set && !cctx->key_set)
519 if (!ctx->encrypt && !cctx->tag_set)
525 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
530 /* If have AAD need message length */
531 if (!cctx->len_set && len)
533 CRYPTO_ccm128_aad(ccm, in, len);
536 /* EVP_*Final() doesn't return any data */
539 /* If not set length yet do it */
542 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
548 if (CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
549 aesni_ccm64_encrypt_blocks))
557 if (!CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
558 aesni_ccm64_decrypt_blocks))
560 unsigned char tag[16];
561 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
563 if (!memcmp(tag, ctx->buf, cctx->M))
568 OPENSSL_cleanse(out, len);
577 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
578 static const EVP_CIPHER aesni_##keylen##_##mode = { \
579 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
580 flags|EVP_CIPH_##MODE##_MODE, \
582 aesni_##mode##_cipher, \
584 sizeof(EVP_AES_KEY), \
585 NULL,NULL,NULL,NULL }; \
586 static const EVP_CIPHER aes_##keylen##_##mode = { \
587 nid##_##keylen##_##nmode,blocksize, \
589 flags|EVP_CIPH_##MODE##_MODE, \
591 aes_##mode##_cipher, \
593 sizeof(EVP_AES_KEY), \
594 NULL,NULL,NULL,NULL }; \
595 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
596 { return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
597 &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
599 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
600 static const EVP_CIPHER aesni_##keylen##_##mode = { \
601 nid##_##keylen##_##mode,blocksize, \
602 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
603 flags|EVP_CIPH_##MODE##_MODE, \
604 aesni_##mode##_init_key, \
605 aesni_##mode##_cipher, \
606 aes_##mode##_cleanup, \
607 sizeof(EVP_AES_##MODE##_CTX), \
608 NULL,NULL,aes_##mode##_ctrl,NULL }; \
609 static const EVP_CIPHER aes_##keylen##_##mode = { \
610 nid##_##keylen##_##mode,blocksize, \
611 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
612 flags|EVP_CIPH_##MODE##_MODE, \
613 aes_##mode##_init_key, \
614 aes_##mode##_cipher, \
615 aes_##mode##_cleanup, \
616 sizeof(EVP_AES_##MODE##_CTX), \
617 NULL,NULL,aes_##mode##_ctrl,NULL }; \
618 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
619 { return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
620 &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
624 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
625 static const EVP_CIPHER aes_##keylen##_##mode = { \
626 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
627 flags|EVP_CIPH_##MODE##_MODE, \
629 aes_##mode##_cipher, \
631 sizeof(EVP_AES_KEY), \
632 NULL,NULL,NULL,NULL }; \
633 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
634 { return &aes_##keylen##_##mode; }
636 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
637 static const EVP_CIPHER aes_##keylen##_##mode = { \
638 nid##_##keylen##_##mode,blocksize, \
639 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
640 flags|EVP_CIPH_##MODE##_MODE, \
641 aes_##mode##_init_key, \
642 aes_##mode##_cipher, \
643 aes_##mode##_cleanup, \
644 sizeof(EVP_AES_##MODE##_CTX), \
645 NULL,NULL,aes_##mode##_ctrl,NULL }; \
646 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
647 { return &aes_##keylen##_##mode; }
650 #define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \
651 BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
652 BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
653 BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
654 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
655 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \
656 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \
657 BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
659 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
660 const unsigned char *iv, int enc)
664 if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
665 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
667 ret = AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
669 ret = AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
673 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
680 static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
681 const unsigned char *in, size_t len)
683 AES_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
688 static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
689 const unsigned char *in, size_t len)
691 size_t bl = ctx->cipher->block_size;
694 if (len<bl) return 1;
697 for (i=0,len-=bl;i<=len;i+=bl)
698 AES_encrypt(in+i,out+i,ctx->cipher_data);
700 for (i=0,len-=bl;i<=len;i+=bl)
701 AES_decrypt(in+i,out+i,ctx->cipher_data);
707 static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
708 const unsigned char *in,size_t len)
710 CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
712 (block128_f)AES_encrypt);
716 static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
717 const unsigned char *in,size_t len)
719 CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
720 ctx->iv,&ctx->num,ctx->encrypt,
721 (block128_f)AES_encrypt);
725 static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
726 const unsigned char *in,size_t len)
728 CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
729 ctx->iv,&ctx->num,ctx->encrypt,
730 (block128_f)AES_encrypt);
734 static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
735 const unsigned char *in,size_t len)
737 if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
738 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
739 ctx->iv,&ctx->num,ctx->encrypt,
740 (block128_f)AES_encrypt);
744 while (len>=MAXBITCHUNK) {
745 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
746 ctx->iv,&ctx->num,ctx->encrypt,
747 (block128_f)AES_encrypt);
751 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
752 ctx->iv,&ctx->num,ctx->encrypt,
753 (block128_f)AES_encrypt);
758 static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
759 const unsigned char *in, size_t len)
764 void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
765 size_t blocks, const AES_KEY *key,
766 const unsigned char ivec[AES_BLOCK_SIZE]);
768 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
769 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
770 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
772 CRYPTO_ctr128_encrypt(in,out,len,
773 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
774 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
776 ctx->num = (size_t)num;
780 BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS)
781 BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS)
782 BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS)
784 static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
786 EVP_AES_GCM_CTX *gctx = c->cipher_data;
787 OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
788 if (gctx->iv != c->iv)
789 OPENSSL_free(gctx->iv);
793 /* increment counter (64-bit int) by 1 */
794 static void ctr64_inc(unsigned char *counter) {
807 static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
809 EVP_AES_GCM_CTX *gctx = c->cipher_data;
815 gctx->ivlen = c->cipher->iv_len;
819 gctx->tls_aad_len = -1;
822 case EVP_CTRL_GCM_SET_IVLEN:
826 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
830 /* Allocate memory for IV if needed */
831 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
833 if (gctx->iv != c->iv)
834 OPENSSL_free(gctx->iv);
835 gctx->iv = OPENSSL_malloc(arg);
842 case EVP_CTRL_GCM_SET_TAG:
843 if (arg <= 0 || arg > 16 || c->encrypt)
845 memcpy(c->buf, ptr, arg);
849 case EVP_CTRL_GCM_GET_TAG:
850 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
852 memcpy(ptr, c->buf, arg);
855 case EVP_CTRL_GCM_SET_IV_FIXED:
856 /* Special case: -1 length restores whole IV */
859 memcpy(gctx->iv, ptr, gctx->ivlen);
863 /* Fixed field must be at least 4 bytes and invocation field
866 if ((arg < 4) || (gctx->ivlen - arg) < 8)
869 memcpy(gctx->iv, ptr, arg);
871 RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
876 case EVP_CTRL_GCM_IV_GEN:
877 if (gctx->iv_gen == 0 || gctx->key_set == 0)
879 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
880 if (arg <= 0 || arg > gctx->ivlen)
882 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
883 /* Invocation field will be at least 8 bytes in size and
884 * so no need to check wrap around or increment more than
887 ctr64_inc(gctx->iv + gctx->ivlen - 8);
891 case EVP_CTRL_GCM_SET_IV_INV:
892 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
894 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
895 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
899 case EVP_CTRL_AEAD_TLS1_AAD:
900 /* Save the AAD for later use */
903 memcpy(c->buf, ptr, arg);
904 gctx->tls_aad_len = arg;
906 unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1];
907 /* Correct length for explicit IV */
908 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
909 /* If decrypting correct for tag too */
911 len -= EVP_GCM_TLS_TAG_LEN;
912 c->buf[arg-2] = len>>8;
913 c->buf[arg-1] = len & 0xff;
915 /* Extra padding: tag appended to record */
916 return EVP_GCM_TLS_TAG_LEN;
924 static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
925 const unsigned char *iv, int enc)
927 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
932 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
933 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
934 /* If we have an iv can set it directly, otherwise use
937 if (iv == NULL && gctx->iv_set)
941 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
948 /* If key set use IV, otherwise copy */
950 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
952 memcpy(gctx->iv, iv, gctx->ivlen);
959 /* Handle TLS GCM packet format. This consists of the last portion of the IV
960 * followed by the payload and finally the tag. On encrypt generate IV,
961 * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
965 static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
966 const unsigned char *in, size_t len)
968 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
970 /* Encrypt/decrypt must be performed in place */
973 /* Set IV from start of buffer or generate IV and write to start
976 if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
977 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
978 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
981 if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
983 /* Fix buffer and length to point to payload */
984 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
985 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
986 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
989 /* Encrypt payload */
990 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
993 /* Finally write tag */
994 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
995 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
1000 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1003 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
1004 EVP_GCM_TLS_TAG_LEN);
1005 /* If tag mismatch wipe buffer */
1006 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
1008 OPENSSL_cleanse(out, len);
1016 gctx->tls_aad_len = -1;
1020 static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1021 const unsigned char *in, size_t len)
1023 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
1024 /* If not set up, return error */
1028 if (gctx->tls_aad_len >= 0)
1029 return aes_gcm_tls_cipher(ctx, out, in, len);
1033 if (!ctx->encrypt && gctx->taglen < 0)
1039 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
1042 else if (ctx->encrypt)
1044 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
1049 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1058 if (CRYPTO_gcm128_finish(&gctx->gcm,
1059 ctx->buf, gctx->taglen) != 0)
1064 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
1066 /* Don't reuse the IV */
1073 #define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
1074 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
1075 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT)
1077 BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM,
1078 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1079 BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM,
1080 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1081 BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM,
1082 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1084 static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1086 EVP_AES_XTS_CTX *xctx = c->cipher_data;
1087 if (type != EVP_CTRL_INIT)
1089 /* key1 and key2 are used as an indicator both key and IV are set */
1090 xctx->xts.key1 = NULL;
1091 xctx->xts.key2 = NULL;
1095 static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1096 const unsigned char *iv, int enc)
1098 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1104 /* key_len is two AES keys */
1107 AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1108 xctx->xts.block1 = (block128_f)AES_encrypt;
1112 AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1113 xctx->xts.block1 = (block128_f)AES_decrypt;
1116 AES_set_encrypt_key(key + ctx->key_len/2,
1117 ctx->key_len * 4, &xctx->ks2);
1118 xctx->xts.block2 = (block128_f)AES_encrypt;
1120 xctx->xts.key1 = &xctx->ks1;
1125 xctx->xts.key2 = &xctx->ks2;
1126 memcpy(ctx->iv, iv, 16);
1132 static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1133 const unsigned char *in, size_t len)
1135 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1136 if (!xctx->xts.key1 || !xctx->xts.key2)
1141 /* Requirement of SP800-38E */
1142 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
1143 (len > (1L<<20)*16))
1145 EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE);
1149 if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1155 #define aes_xts_cleanup NULL
1157 BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1158 BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1160 static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1162 EVP_AES_CCM_CTX *cctx = c->cipher_data;
1174 case EVP_CTRL_CCM_SET_IVLEN:
1176 case EVP_CTRL_CCM_SET_L:
1177 if (arg < 2 || arg > 8)
1182 case EVP_CTRL_CCM_SET_TAG:
1183 if ((arg & 1) || arg < 4 || arg > 16)
1185 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1190 memcpy(c->buf, ptr, arg);
1195 case EVP_CTRL_CCM_GET_TAG:
1196 if (!c->encrypt || !cctx->tag_set)
1198 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
1211 static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1212 const unsigned char *iv, int enc)
1214 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1219 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
1220 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1221 &cctx->ks, (block128_f)AES_encrypt);
1226 memcpy(ctx->iv, iv, 15 - cctx->L);
1232 static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1233 const unsigned char *in, size_t len)
1235 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1236 CCM128_CONTEXT *ccm = &cctx->ccm;
1237 /* If not set up, return error */
1238 if (!cctx->iv_set && !cctx->key_set)
1240 if (!ctx->encrypt && !cctx->tag_set)
1246 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
1251 /* If have AAD need message length */
1252 if (!cctx->len_set && len)
1254 CRYPTO_ccm128_aad(ccm, in, len);
1257 /* EVP_*Final() doesn't return any data */
1260 /* If not set length yet do it */
1263 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1269 if (CRYPTO_ccm128_encrypt(ccm, in, out, len))
1277 if (!CRYPTO_ccm128_decrypt(ccm, in, out, len))
1279 unsigned char tag[16];
1280 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
1282 if (!memcmp(tag, ctx->buf, cctx->M))
1287 OPENSSL_cleanse(out, len);
1296 #define aes_ccm_cleanup NULL
1298 BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1299 BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1300 BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)