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) || \
110 extern unsigned int OPENSSL_ia32cap_P[2];
111 #define AESNI_CAPABLE (1<<(57-32))
113 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
115 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
118 void aesni_encrypt(const unsigned char *in, unsigned char *out,
120 void aesni_decrypt(const unsigned char *in, unsigned char *out,
123 void aesni_ecb_encrypt(const unsigned char *in,
128 void aesni_cbc_encrypt(const unsigned char *in,
132 unsigned char *ivec, int enc);
134 void aesni_ctr32_encrypt_blocks(const unsigned char *in,
138 const unsigned char *ivec);
140 void aesni_xts_encrypt(const unsigned char *in,
143 const AES_KEY *key1, const AES_KEY *key2,
144 const unsigned char iv[16]);
146 void aesni_xts_decrypt(const unsigned char *in,
149 const AES_KEY *key1, const AES_KEY *key2,
150 const unsigned char iv[16]);
152 void aesni_ccm64_encrypt_blocks (const unsigned char *in,
156 const unsigned char ivec[16],
157 unsigned char cmac[16]);
159 void aesni_ccm64_decrypt_blocks (const unsigned char *in,
163 const unsigned char ivec[16],
164 unsigned char cmac[16]);
166 static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
167 const unsigned char *iv, int enc)
171 if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
172 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
174 ret = aesni_set_decrypt_key(key, ctx->key_len*8, ctx->cipher_data);
176 ret = aesni_set_encrypt_key(key, ctx->key_len*8, ctx->cipher_data);
180 EVPerr(EVP_F_AESNI_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
187 static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
188 const unsigned char *in, size_t len)
190 aesni_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
195 static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
196 const unsigned char *in, size_t len)
198 size_t bl = ctx->cipher->block_size;
200 if (len<bl) return 1;
202 aesni_ecb_encrypt(in,out,len,ctx->cipher_data,ctx->encrypt);
207 static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
208 const unsigned char *in,size_t len)
210 CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
212 (block128_f)aesni_encrypt);
216 static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
217 const unsigned char *in,size_t len)
219 CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
220 ctx->iv,&ctx->num,ctx->encrypt,
221 (block128_f)aesni_encrypt);
225 static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
226 const unsigned char *in,size_t len)
228 CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
229 ctx->iv,&ctx->num,ctx->encrypt,
230 (block128_f)aesni_encrypt);
234 static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
235 const unsigned char *in,size_t len)
237 if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
238 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
239 ctx->iv,&ctx->num,ctx->encrypt,
240 (block128_f)aesni_encrypt);
244 while (len>=MAXBITCHUNK) {
245 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
246 ctx->iv,&ctx->num,ctx->encrypt,
247 (block128_f)aesni_encrypt);
251 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
252 ctx->iv,&ctx->num,ctx->encrypt,
253 (block128_f)aesni_encrypt);
258 static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
259 const unsigned char *in, size_t len)
264 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
265 ctx->cipher_data,ctx->iv,ctx->buf,&num,
266 (ctr128_f)aesni_ctr32_encrypt_blocks);
268 ctx->num = (size_t)num;
272 static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
273 const unsigned char *iv, int enc)
275 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
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
286 if (iv == NULL && gctx->iv_set)
290 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
297 /* If key set use IV, otherwise copy */
299 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
301 memcpy(gctx->iv, iv, gctx->ivlen);
308 /* Handle TLS GCM packet format. This consists of the last portion of the IV
309 * followed by the payload and finally the tag. On encrypt generate IV,
310 * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
314 static int aesni_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
315 const unsigned char *in, size_t len)
317 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
319 /* Encrypt/decrypt must be performed in place */
322 /* Set IV from start of buffer or generate IV and write to start
325 if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
326 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
327 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
330 if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
332 /* Fix buffer and length to point to payload */
333 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
334 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
335 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
338 /* Encrypt payload */
339 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, in, out, len,
340 aesni_ctr32_encrypt_blocks))
343 /* Finally write tag */
344 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
345 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
350 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, in, out, len,
351 aesni_ctr32_encrypt_blocks))
354 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
355 EVP_GCM_TLS_TAG_LEN);
356 /* If tag mismatch wipe buffer */
357 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
359 OPENSSL_cleanse(out, len);
367 gctx->tls_aad_len = -1;
371 static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
372 const unsigned char *in, size_t len)
374 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
375 /* If not set up, return error */
379 if (gctx->tls_aad_len >= 0)
380 return aesni_gcm_tls_cipher(ctx, out, in, len);
384 if (!ctx->encrypt && gctx->taglen < 0)
390 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
393 else if (ctx->encrypt)
395 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
397 aesni_ctr32_encrypt_blocks))
402 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
404 aesni_ctr32_encrypt_blocks))
413 if (CRYPTO_gcm128_finish(&gctx->gcm,
414 ctx->buf, gctx->taglen) != 0)
419 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
421 /* Don't reuse the IV */
428 static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
429 const unsigned char *iv, int enc)
431 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
437 /* key_len is two AES keys */
440 aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
441 xctx->xts.block1 = (block128_f)aesni_encrypt;
445 aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
446 xctx->xts.block1 = (block128_f)aesni_decrypt;
449 aesni_set_encrypt_key(key + ctx->key_len/2,
450 ctx->key_len * 4, &xctx->ks2);
451 xctx->xts.block2 = (block128_f)aesni_encrypt;
453 xctx->xts.key1 = &xctx->ks1;
458 xctx->xts.key2 = &xctx->ks2;
459 memcpy(ctx->iv, iv, 16);
465 static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
466 const unsigned char *in, size_t len)
468 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
469 if (!xctx->xts.key1 || !xctx->xts.key2)
474 /* Requirement of SP800-38E */
475 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
478 EVPerr(EVP_F_AESNI_XTS_CIPHER, EVP_R_TOO_LARGE);
483 aesni_xts_encrypt(in, out, len,
484 xctx->xts.key1, xctx->xts.key2, ctx->iv);
486 aesni_xts_decrypt(in, out, len,
487 xctx->xts.key1, xctx->xts.key2, ctx->iv);
492 static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
493 const unsigned char *iv, int enc)
495 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
500 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
501 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
502 &cctx->ks, (block128_f)aesni_encrypt);
507 memcpy(ctx->iv, iv, 15 - cctx->L);
513 static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
514 const unsigned char *in, size_t len)
516 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
517 CCM128_CONTEXT *ccm = &cctx->ccm;
518 /* If not set up, return error */
519 if (!cctx->iv_set && !cctx->key_set)
521 if (!ctx->encrypt && !cctx->tag_set)
527 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
532 /* If have AAD need message length */
533 if (!cctx->len_set && len)
535 CRYPTO_ccm128_aad(ccm, in, len);
538 /* EVP_*Final() doesn't return any data */
541 /* If not set length yet do it */
544 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
550 if (CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
551 aesni_ccm64_encrypt_blocks))
559 if (!CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
560 aesni_ccm64_decrypt_blocks))
562 unsigned char tag[16];
563 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
565 if (!memcmp(tag, ctx->buf, cctx->M))
570 OPENSSL_cleanse(out, len);
579 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
580 static const EVP_CIPHER aesni_##keylen##_##mode = { \
581 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
582 flags|EVP_CIPH_##MODE##_MODE, \
584 aesni_##mode##_cipher, \
586 sizeof(EVP_AES_KEY), \
587 NULL,NULL,NULL,NULL }; \
588 static const EVP_CIPHER aes_##keylen##_##mode = { \
589 nid##_##keylen##_##nmode,blocksize, \
591 flags|EVP_CIPH_##MODE##_MODE, \
593 aes_##mode##_cipher, \
595 sizeof(EVP_AES_KEY), \
596 NULL,NULL,NULL,NULL }; \
597 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
598 { return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
599 &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
601 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
602 static const EVP_CIPHER aesni_##keylen##_##mode = { \
603 nid##_##keylen##_##mode,blocksize, \
604 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
605 flags|EVP_CIPH_##MODE##_MODE, \
606 aesni_##mode##_init_key, \
607 aesni_##mode##_cipher, \
608 aes_##mode##_cleanup, \
609 sizeof(EVP_AES_##MODE##_CTX), \
610 NULL,NULL,aes_##mode##_ctrl,NULL }; \
611 static const EVP_CIPHER aes_##keylen##_##mode = { \
612 nid##_##keylen##_##mode,blocksize, \
613 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
614 flags|EVP_CIPH_##MODE##_MODE, \
615 aes_##mode##_init_key, \
616 aes_##mode##_cipher, \
617 aes_##mode##_cleanup, \
618 sizeof(EVP_AES_##MODE##_CTX), \
619 NULL,NULL,aes_##mode##_ctrl,NULL }; \
620 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
621 { return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
622 &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
626 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
627 static const EVP_CIPHER aes_##keylen##_##mode = { \
628 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
629 flags|EVP_CIPH_##MODE##_MODE, \
631 aes_##mode##_cipher, \
633 sizeof(EVP_AES_KEY), \
634 NULL,NULL,NULL,NULL }; \
635 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
636 { return &aes_##keylen##_##mode; }
638 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
639 static const EVP_CIPHER aes_##keylen##_##mode = { \
640 nid##_##keylen##_##mode,blocksize, \
641 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
642 flags|EVP_CIPH_##MODE##_MODE, \
643 aes_##mode##_init_key, \
644 aes_##mode##_cipher, \
645 aes_##mode##_cleanup, \
646 sizeof(EVP_AES_##MODE##_CTX), \
647 NULL,NULL,aes_##mode##_ctrl,NULL }; \
648 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
649 { return &aes_##keylen##_##mode; }
652 #define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \
653 BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
654 BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
655 BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
656 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
657 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \
658 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \
659 BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
661 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
662 const unsigned char *iv, int enc)
666 if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
667 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
669 ret = AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
671 ret = AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
675 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
682 static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
683 const unsigned char *in, size_t len)
685 AES_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
690 static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
691 const unsigned char *in, size_t len)
693 size_t bl = ctx->cipher->block_size;
696 if (len<bl) return 1;
699 for (i=0,len-=bl;i<=len;i+=bl)
700 AES_encrypt(in+i,out+i,ctx->cipher_data);
702 for (i=0,len-=bl;i<=len;i+=bl)
703 AES_decrypt(in+i,out+i,ctx->cipher_data);
709 static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
710 const unsigned char *in,size_t len)
712 CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
714 (block128_f)AES_encrypt);
718 static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
719 const unsigned char *in,size_t len)
721 CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
722 ctx->iv,&ctx->num,ctx->encrypt,
723 (block128_f)AES_encrypt);
727 static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
728 const unsigned char *in,size_t len)
730 CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
731 ctx->iv,&ctx->num,ctx->encrypt,
732 (block128_f)AES_encrypt);
736 static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
737 const unsigned char *in,size_t len)
739 if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
740 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
741 ctx->iv,&ctx->num,ctx->encrypt,
742 (block128_f)AES_encrypt);
746 while (len>=MAXBITCHUNK) {
747 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
748 ctx->iv,&ctx->num,ctx->encrypt,
749 (block128_f)AES_encrypt);
753 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
754 ctx->iv,&ctx->num,ctx->encrypt,
755 (block128_f)AES_encrypt);
760 static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
761 const unsigned char *in, size_t len)
766 void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
767 size_t blocks, const AES_KEY *key,
768 const unsigned char ivec[AES_BLOCK_SIZE]);
770 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
771 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
772 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
774 CRYPTO_ctr128_encrypt(in,out,len,
775 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
776 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
778 ctx->num = (size_t)num;
782 BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS)
783 BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS)
784 BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS)
786 static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
788 EVP_AES_GCM_CTX *gctx = c->cipher_data;
789 OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
790 if (gctx->iv != c->iv)
791 OPENSSL_free(gctx->iv);
795 /* increment counter (64-bit int) by 1 */
796 static void ctr64_inc(unsigned char *counter) {
809 static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
811 EVP_AES_GCM_CTX *gctx = c->cipher_data;
817 gctx->ivlen = c->cipher->iv_len;
821 gctx->tls_aad_len = -1;
824 case EVP_CTRL_GCM_SET_IVLEN:
828 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
832 /* Allocate memory for IV if needed */
833 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
835 if (gctx->iv != c->iv)
836 OPENSSL_free(gctx->iv);
837 gctx->iv = OPENSSL_malloc(arg);
844 case EVP_CTRL_GCM_SET_TAG:
845 if (arg <= 0 || arg > 16 || c->encrypt)
847 memcpy(c->buf, ptr, arg);
851 case EVP_CTRL_GCM_GET_TAG:
852 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
854 memcpy(ptr, c->buf, arg);
857 case EVP_CTRL_GCM_SET_IV_FIXED:
858 /* Special case: -1 length restores whole IV */
861 memcpy(gctx->iv, ptr, gctx->ivlen);
865 /* Fixed field must be at least 4 bytes and invocation field
868 if ((arg < 4) || (gctx->ivlen - arg) < 8)
871 memcpy(gctx->iv, ptr, arg);
873 RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
878 case EVP_CTRL_GCM_IV_GEN:
879 if (gctx->iv_gen == 0 || gctx->key_set == 0)
881 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
882 if (arg <= 0 || arg > gctx->ivlen)
884 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
885 /* Invocation field will be at least 8 bytes in size and
886 * so no need to check wrap around or increment more than
889 ctr64_inc(gctx->iv + gctx->ivlen - 8);
893 case EVP_CTRL_GCM_SET_IV_INV:
894 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
896 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
897 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
901 case EVP_CTRL_AEAD_TLS1_AAD:
902 /* Save the AAD for later use */
905 memcpy(c->buf, ptr, arg);
906 gctx->tls_aad_len = arg;
908 unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1];
909 /* Correct length for explicit IV */
910 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
911 /* If decrypting correct for tag too */
913 len -= EVP_GCM_TLS_TAG_LEN;
914 c->buf[arg-2] = len>>8;
915 c->buf[arg-1] = len & 0xff;
917 /* Extra padding: tag appended to record */
918 return EVP_GCM_TLS_TAG_LEN;
926 static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
927 const unsigned char *iv, int enc)
929 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
934 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
935 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
936 /* If we have an iv can set it directly, otherwise use
939 if (iv == NULL && gctx->iv_set)
943 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
950 /* If key set use IV, otherwise copy */
952 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
954 memcpy(gctx->iv, iv, gctx->ivlen);
961 /* Handle TLS GCM packet format. This consists of the last portion of the IV
962 * followed by the payload and finally the tag. On encrypt generate IV,
963 * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
967 static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
968 const unsigned char *in, size_t len)
970 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
972 /* Encrypt/decrypt must be performed in place */
975 /* Set IV from start of buffer or generate IV and write to start
978 if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
979 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
980 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
983 if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
985 /* Fix buffer and length to point to payload */
986 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
987 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
988 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
991 /* Encrypt payload */
992 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
995 /* Finally write tag */
996 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
997 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
1002 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1005 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
1006 EVP_GCM_TLS_TAG_LEN);
1007 /* If tag mismatch wipe buffer */
1008 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
1010 OPENSSL_cleanse(out, len);
1018 gctx->tls_aad_len = -1;
1022 static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1023 const unsigned char *in, size_t len)
1025 EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
1026 /* If not set up, return error */
1030 if (gctx->tls_aad_len >= 0)
1031 return aes_gcm_tls_cipher(ctx, out, in, len);
1035 if (!ctx->encrypt && gctx->taglen < 0)
1041 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
1044 else if (ctx->encrypt)
1046 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
1051 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1060 if (CRYPTO_gcm128_finish(&gctx->gcm,
1061 ctx->buf, gctx->taglen) != 0)
1066 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
1068 /* Don't reuse the IV */
1075 #define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
1076 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
1077 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT)
1079 BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM,
1080 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1081 BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM,
1082 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1083 BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM,
1084 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1086 static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1088 EVP_AES_XTS_CTX *xctx = c->cipher_data;
1089 if (type != EVP_CTRL_INIT)
1091 /* key1 and key2 are used as an indicator both key and IV are set */
1092 xctx->xts.key1 = NULL;
1093 xctx->xts.key2 = NULL;
1097 static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1098 const unsigned char *iv, int enc)
1100 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1106 /* key_len is two AES keys */
1109 AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1110 xctx->xts.block1 = (block128_f)AES_encrypt;
1114 AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1115 xctx->xts.block1 = (block128_f)AES_decrypt;
1118 AES_set_encrypt_key(key + ctx->key_len/2,
1119 ctx->key_len * 4, &xctx->ks2);
1120 xctx->xts.block2 = (block128_f)AES_encrypt;
1122 xctx->xts.key1 = &xctx->ks1;
1127 xctx->xts.key2 = &xctx->ks2;
1128 memcpy(ctx->iv, iv, 16);
1134 static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1135 const unsigned char *in, size_t len)
1137 EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1138 if (!xctx->xts.key1 || !xctx->xts.key2)
1143 /* Requirement of SP800-38E */
1144 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
1145 (len > (1L<<20)*16))
1147 EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE);
1151 if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1157 #define aes_xts_cleanup NULL
1159 BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1160 BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1162 static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1164 EVP_AES_CCM_CTX *cctx = c->cipher_data;
1176 case EVP_CTRL_CCM_SET_IVLEN:
1178 case EVP_CTRL_CCM_SET_L:
1179 if (arg < 2 || arg > 8)
1184 case EVP_CTRL_CCM_SET_TAG:
1185 if ((arg & 1) || arg < 4 || arg > 16)
1187 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1192 memcpy(c->buf, ptr, arg);
1197 case EVP_CTRL_CCM_GET_TAG:
1198 if (!c->encrypt || !cctx->tag_set)
1200 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
1213 static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1214 const unsigned char *iv, int enc)
1216 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1221 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
1222 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1223 &cctx->ks, (block128_f)AES_encrypt);
1228 memcpy(ctx->iv, iv, 15 - cctx->L);
1234 static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1235 const unsigned char *in, size_t len)
1237 EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1238 CCM128_CONTEXT *ccm = &cctx->ccm;
1239 /* If not set up, return error */
1240 if (!cctx->iv_set && !cctx->key_set)
1242 if (!ctx->encrypt && !cctx->tag_set)
1248 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
1253 /* If have AAD need message length */
1254 if (!cctx->len_set && len)
1256 CRYPTO_ccm128_aad(ccm, in, len);
1259 /* EVP_*Final() doesn't return any data */
1262 /* If not set length yet do it */
1265 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1271 if (CRYPTO_ccm128_encrypt(ccm, in, out, len))
1279 if (!CRYPTO_ccm128_decrypt(ccm, in, out, len))
1281 unsigned char tag[16];
1282 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
1284 if (!memcmp(tag, ctx->buf, cctx->M))
1289 OPENSSL_cleanse(out, len);
1298 #define aes_ccm_cleanup NULL
1300 BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1301 BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1302 BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)