1 /* ====================================================================
2 * Copyright (c) 2011-2013 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 * licensing@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 * ====================================================================
50 #include <openssl/opensslconf.h>
55 #if !defined(OPENSSL_NO_AES) && !defined(OPENSSL_NO_SHA1)
57 #include <openssl/evp.h>
58 #include <openssl/objects.h>
59 #include <openssl/aes.h>
60 #include <openssl/sha.h>
62 #ifndef EVP_CIPH_FLAG_AEAD_CIPHER
63 #define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
64 #define EVP_CTRL_AEAD_TLS1_AAD 0x16
65 #define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
68 #if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1)
69 #define EVP_CIPH_FLAG_DEFAULT_ASN1 0
72 #define TLS1_1_VERSION 0x0302
78 size_t payload_length; /* AAD length in decrypt case */
81 unsigned char tls_aad[16]; /* 13 used */
85 #define NO_PAYLOAD_LENGTH ((size_t)-1)
87 #if defined(AES_ASM) && ( \
88 defined(__x86_64) || defined(__x86_64__) || \
89 defined(_M_AMD64) || defined(_M_X64) || \
92 #if defined(__GNUC__) && __GNUC__>=2 && !defined(PEDANTIC)
93 # define BSWAP(x) ({ unsigned int r=(x); asm ("bswapl %0":"=r"(r):"0"(r)); r; })
96 extern unsigned int OPENSSL_ia32cap_P[2];
97 #define AESNI_CAPABLE (1<<(57-32))
99 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
101 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
104 void aesni_cbc_encrypt(const unsigned char *in,
108 unsigned char *ivec, int enc);
110 void aesni_cbc_sha1_enc (const void *inp, void *out, size_t blocks,
111 const AES_KEY *key, unsigned char iv[16],
112 SHA_CTX *ctx,const void *in0);
114 #define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data)
116 static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
117 const unsigned char *inkey,
118 const unsigned char *iv, int enc)
120 EVP_AES_HMAC_SHA1 *key = data(ctx);
124 ret=aesni_set_encrypt_key(inkey,ctx->key_len*8,&key->ks);
126 ret=aesni_set_decrypt_key(inkey,ctx->key_len*8,&key->ks);
128 SHA1_Init(&key->head); /* handy when benchmarking */
129 key->tail = key->head;
132 key->payload_length = NO_PAYLOAD_LENGTH;
137 #define STITCHED_CALL
139 #if !defined(STITCHED_CALL)
143 void sha1_block_data_order (void *c,const void *p,size_t len);
145 static void sha1_update(SHA_CTX *c,const void *data,size_t len)
146 { const unsigned char *ptr = data;
149 if ((res = c->num)) {
150 res = SHA_CBLOCK-res;
151 if (len<res) res=len;
152 SHA1_Update (c,ptr,res);
157 res = len % SHA_CBLOCK;
161 sha1_block_data_order(c,ptr,len/SHA_CBLOCK);
166 if (c->Nl<(unsigned int)len) c->Nh++;
170 SHA1_Update(c,ptr,res);
176 #define SHA1_Update sha1_update
178 static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
179 const unsigned char *in, size_t len)
181 EVP_AES_HMAC_SHA1 *key = data(ctx);
183 size_t plen = key->payload_length,
184 iv = 0, /* explicit IV in TLS 1.1 and later */
186 #if defined(STITCHED_CALL)
190 sha_off = SHA_CBLOCK-key->md.num;
193 key->payload_length = NO_PAYLOAD_LENGTH;
195 if (len%AES_BLOCK_SIZE) return 0;
198 if (plen==NO_PAYLOAD_LENGTH)
200 else if (len!=((plen+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE))
202 else if (key->aux.tls_ver >= TLS1_1_VERSION)
205 #if defined(STITCHED_CALL)
206 if (plen>(sha_off+iv) && (blocks=(plen-(sha_off+iv))/SHA_CBLOCK)) {
207 SHA1_Update(&key->md,in+iv,sha_off);
209 aesni_cbc_sha1_enc(in,out,blocks,&key->ks,
210 ctx->iv,&key->md,in+iv+sha_off);
211 blocks *= SHA_CBLOCK;
214 key->md.Nh += blocks>>29;
215 key->md.Nl += blocks<<=3;
216 if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
222 SHA1_Update(&key->md,in+sha_off,plen-sha_off);
224 if (plen!=len) { /* "TLS" mode of operation */
226 memcpy(out+aes_off,in+aes_off,plen-aes_off);
228 /* calculate HMAC and append it to payload */
229 SHA1_Final(out+plen,&key->md);
231 SHA1_Update(&key->md,out+plen,SHA_DIGEST_LENGTH);
232 SHA1_Final(out+plen,&key->md);
234 /* pad the payload|hmac */
235 plen += SHA_DIGEST_LENGTH;
236 for (l=len-plen-1;plen<len;plen++) out[plen]=l;
237 /* encrypt HMAC|padding at once */
238 aesni_cbc_encrypt(out+aes_off,out+aes_off,len-aes_off,
241 aesni_cbc_encrypt(in+aes_off,out+aes_off,len-aes_off,
245 union { unsigned int u[SHA_DIGEST_LENGTH/sizeof(unsigned int)];
246 unsigned char c[SHA_DIGEST_LENGTH]; } mac;
248 /* decrypt HMAC|padding at once */
249 aesni_cbc_encrypt(in,out,len,
252 if (plen) { /* "TLS" mode of operation */
253 size_t inp_len, mask, j, i;
254 unsigned int res, maxpad, pad, bitlen;
256 union { unsigned int u[SHA_LBLOCK];
257 unsigned char c[SHA_CBLOCK]; }
258 *data = (void *)key->md.data;
260 if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3])
264 if (len<(iv+SHA_DIGEST_LENGTH+1))
267 /* omit explicit iv */
271 /* figure out payload length */
273 maxpad = len-(SHA_DIGEST_LENGTH+1);
274 maxpad |= (255-maxpad)>>(sizeof(maxpad)*8-8);
277 inp_len = len - (SHA_DIGEST_LENGTH+pad+1);
278 mask = (0-((inp_len-len)>>(sizeof(inp_len)*8-1)));
282 key->aux.tls_aad[plen-2] = inp_len>>8;
283 key->aux.tls_aad[plen-1] = inp_len;
287 SHA1_Update(&key->md,key->aux.tls_aad,plen);
290 len -= SHA_DIGEST_LENGTH; /* amend mac */
291 if (len>=(256+SHA_CBLOCK)) {
292 j = (len-(256+SHA_CBLOCK))&(0-SHA_CBLOCK);
293 j += SHA_CBLOCK-key->md.num;
294 SHA1_Update(&key->md,out,j);
300 /* but pretend as if we hashed padded payload */
301 bitlen = key->md.Nl+(inp_len<<3); /* at most 18 bits */
303 mac.c[1] = (unsigned char)(bitlen>>16);
304 mac.c[2] = (unsigned char)(bitlen>>8);
305 mac.c[3] = (unsigned char)bitlen;
314 for (res=key->md.num, j=0;j<len;j++) {
316 mask = (j-inp_len)>>(sizeof(j)*8-8);
318 c |= 0x80&~mask&~((inp_len-j)>>(sizeof(j)*8-8));
319 data->c[res++]=(unsigned char)c;
321 if (res!=SHA_CBLOCK) continue;
323 mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
324 data->u[SHA_LBLOCK-1] |= bitlen&mask;
325 sha1_block_data_order(&key->md,data,1);
326 mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
327 mac.u[0] |= key->md.h0 & mask;
328 mac.u[1] |= key->md.h1 & mask;
329 mac.u[2] |= key->md.h2 & mask;
330 mac.u[3] |= key->md.h3 & mask;
331 mac.u[4] |= key->md.h4 & mask;
335 for(i=res;i<SHA_CBLOCK;i++,j++) data->c[i]=0;
337 if (res>SHA_CBLOCK-8) {
338 mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
339 data->u[SHA_LBLOCK-1] |= bitlen&mask;
340 sha1_block_data_order(&key->md,data,1);
341 mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
342 mac.u[0] |= key->md.h0 & mask;
343 mac.u[1] |= key->md.h1 & mask;
344 mac.u[2] |= key->md.h2 & mask;
345 mac.u[3] |= key->md.h3 & mask;
346 mac.u[4] |= key->md.h4 & mask;
348 memset(data,0,SHA_CBLOCK);
351 data->u[SHA_LBLOCK-1] = bitlen;
352 sha1_block_data_order(&key->md,data,1);
353 mask = 0-((j-inp_len-73)>>(sizeof(j)*8-1));
354 mac.u[0] |= key->md.h0 & mask;
355 mac.u[1] |= key->md.h1 & mask;
356 mac.u[2] |= key->md.h2 & mask;
357 mac.u[3] |= key->md.h3 & mask;
358 mac.u[4] |= key->md.h4 & mask;
361 mac.u[0] = BSWAP(mac.u[0]);
362 mac.u[1] = BSWAP(mac.u[1]);
363 mac.u[2] = BSWAP(mac.u[2]);
364 mac.u[3] = BSWAP(mac.u[3]);
365 mac.u[4] = BSWAP(mac.u[4]);
369 mac.c[4*i+0]=(unsigned char)(res>>24);
370 mac.c[4*i+1]=(unsigned char)(res>>16);
371 mac.c[4*i+2]=(unsigned char)(res>>8);
372 mac.c[4*i+3]=(unsigned char)res;
375 len += SHA_DIGEST_LENGTH;
377 SHA1_Update(&key->md,out,inp_len);
379 SHA1_Final(mac.c,&key->md);
382 unsigned int inp_blocks, pad_blocks;
384 /* but pretend as if we hashed padded payload */
385 inp_blocks = 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
386 res += (unsigned int)(len-inp_len);
387 pad_blocks = res / SHA_CBLOCK;
389 pad_blocks += 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
390 for (;inp_blocks<pad_blocks;inp_blocks++)
391 sha1_block_data_order(&key->md,data,1);
395 SHA1_Update(&key->md,mac.c,SHA_DIGEST_LENGTH);
396 SHA1_Final(mac.c,&key->md);
403 unsigned char *p = out+len-1-maxpad-SHA_DIGEST_LENGTH;
405 unsigned int c, cmask;
407 maxpad += SHA_DIGEST_LENGTH;
408 for (res=0,i=0,j=0;j<maxpad;j++) {
410 cmask = ((int)(j-off-SHA_DIGEST_LENGTH))>>(sizeof(int)*8-1);
411 res |= (c^pad)&~cmask; /* ... and padding */
412 cmask &= ((int)(off-1-j))>>(sizeof(int)*8-1);
413 res |= (c^mac.c[i])&cmask;
416 maxpad -= SHA_DIGEST_LENGTH;
418 res = 0-((0-res)>>(sizeof(res)*8-1));
422 for (res=0,i=0;i<SHA_DIGEST_LENGTH;i++)
423 res |= out[i]^mac.c[i];
424 res = 0-((0-res)>>(sizeof(res)*8-1));
428 pad = (pad&~res) | (maxpad&res);
430 for (res=0,i=0;i<pad;i++)
433 res = (0-res)>>(sizeof(res)*8-1);
438 SHA1_Update(&key->md,out,len);
445 static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
447 EVP_AES_HMAC_SHA1 *key = data(ctx);
451 case EVP_CTRL_AEAD_SET_MAC_KEY:
454 unsigned char hmac_key[64];
456 memset (hmac_key,0,sizeof(hmac_key));
458 if (arg > (int)sizeof(hmac_key)) {
459 SHA1_Init(&key->head);
460 SHA1_Update(&key->head,ptr,arg);
461 SHA1_Final(hmac_key,&key->head);
463 memcpy(hmac_key,ptr,arg);
466 for (i=0;i<sizeof(hmac_key);i++)
467 hmac_key[i] ^= 0x36; /* ipad */
468 SHA1_Init(&key->head);
469 SHA1_Update(&key->head,hmac_key,sizeof(hmac_key));
471 for (i=0;i<sizeof(hmac_key);i++)
472 hmac_key[i] ^= 0x36^0x5c; /* opad */
473 SHA1_Init(&key->tail);
474 SHA1_Update(&key->tail,hmac_key,sizeof(hmac_key));
478 case EVP_CTRL_AEAD_TLS1_AAD:
480 unsigned char *p=ptr;
481 unsigned int len=p[arg-2]<<8|p[arg-1];
485 key->payload_length = len;
486 if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) {
487 len -= AES_BLOCK_SIZE;
492 SHA1_Update(&key->md,p,arg);
494 return (int)(((len+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)
499 if (arg>13) arg = 13;
500 memcpy(key->aux.tls_aad,ptr,arg);
501 key->payload_length = arg;
503 return SHA_DIGEST_LENGTH;
511 static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher =
513 #ifdef NID_aes_128_cbc_hmac_sha1
514 NID_aes_128_cbc_hmac_sha1,
519 EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER,
520 aesni_cbc_hmac_sha1_init_key,
521 aesni_cbc_hmac_sha1_cipher,
523 sizeof(EVP_AES_HMAC_SHA1),
524 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
525 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
526 aesni_cbc_hmac_sha1_ctrl,
530 static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher =
532 #ifdef NID_aes_256_cbc_hmac_sha1
533 NID_aes_256_cbc_hmac_sha1,
538 EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER,
539 aesni_cbc_hmac_sha1_init_key,
540 aesni_cbc_hmac_sha1_cipher,
542 sizeof(EVP_AES_HMAC_SHA1),
543 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
544 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
545 aesni_cbc_hmac_sha1_ctrl,
549 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
551 return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
552 &aesni_128_cbc_hmac_sha1_cipher:NULL);
555 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
557 return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
558 &aesni_256_cbc_hmac_sha1_cipher:NULL);
561 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
565 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)