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>
63 #ifndef EVP_CIPH_FLAG_AEAD_CIPHER
64 #define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
65 #define EVP_CTRL_AEAD_TLS1_AAD 0x16
66 #define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
69 #if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1)
70 #define EVP_CIPH_FLAG_DEFAULT_ASN1 0
73 #define TLS1_1_VERSION 0x0302
79 size_t payload_length; /* AAD length in decrypt case */
82 unsigned char tls_aad[16]; /* 13 used */
86 #define NO_PAYLOAD_LENGTH ((size_t)-1)
88 #if defined(AES_ASM) && ( \
89 defined(__x86_64) || defined(__x86_64__) || \
90 defined(_M_AMD64) || defined(_M_X64) || \
93 #if defined(__GNUC__) && __GNUC__>=2 && !defined(PEDANTIC)
94 # define BSWAP(x) ({ unsigned int r=(x); asm ("bswapl %0":"=r"(r):"0"(r)); r; })
97 extern unsigned int OPENSSL_ia32cap_P[2];
98 #define AESNI_CAPABLE (1<<(57-32))
100 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
102 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
105 void aesni_cbc_encrypt(const unsigned char *in,
109 unsigned char *ivec, int enc);
111 void aesni_cbc_sha1_enc (const void *inp, void *out, size_t blocks,
112 const AES_KEY *key, unsigned char iv[16],
113 SHA_CTX *ctx,const void *in0);
115 #define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data)
117 static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
118 const unsigned char *inkey,
119 const unsigned char *iv, int enc)
121 EVP_AES_HMAC_SHA1 *key = data(ctx);
125 ret=aesni_set_encrypt_key(inkey,ctx->key_len*8,&key->ks);
127 ret=aesni_set_decrypt_key(inkey,ctx->key_len*8,&key->ks);
129 SHA1_Init(&key->head); /* handy when benchmarking */
130 key->tail = key->head;
133 key->payload_length = NO_PAYLOAD_LENGTH;
138 #define STITCHED_CALL
140 #if !defined(STITCHED_CALL)
144 void sha1_block_data_order (void *c,const void *p,size_t len);
146 static void sha1_update(SHA_CTX *c,const void *data,size_t len)
147 { const unsigned char *ptr = data;
150 if ((res = c->num)) {
151 res = SHA_CBLOCK-res;
152 if (len<res) res=len;
153 SHA1_Update (c,ptr,res);
158 res = len % SHA_CBLOCK;
162 sha1_block_data_order(c,ptr,len/SHA_CBLOCK);
167 if (c->Nl<(unsigned int)len) c->Nh++;
171 SHA1_Update(c,ptr,res);
177 #define SHA1_Update sha1_update
179 static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
180 const unsigned char *in, size_t len)
182 EVP_AES_HMAC_SHA1 *key = data(ctx);
184 size_t plen = key->payload_length,
185 iv = 0, /* explicit IV in TLS 1.1 and later */
187 #if defined(STITCHED_CALL)
191 sha_off = SHA_CBLOCK-key->md.num;
194 key->payload_length = NO_PAYLOAD_LENGTH;
196 if (len%AES_BLOCK_SIZE) return 0;
199 if (plen==NO_PAYLOAD_LENGTH)
201 else if (len!=((plen+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE))
203 else if (key->aux.tls_ver >= TLS1_1_VERSION)
206 #if defined(STITCHED_CALL)
207 if (plen>(sha_off+iv) && (blocks=(plen-(sha_off+iv))/SHA_CBLOCK)) {
208 SHA1_Update(&key->md,in+iv,sha_off);
210 aesni_cbc_sha1_enc(in,out,blocks,&key->ks,
211 ctx->iv,&key->md,in+iv+sha_off);
212 blocks *= SHA_CBLOCK;
215 key->md.Nh += blocks>>29;
216 key->md.Nl += blocks<<=3;
217 if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
223 SHA1_Update(&key->md,in+sha_off,plen-sha_off);
225 if (plen!=len) { /* "TLS" mode of operation */
227 memcpy(out+aes_off,in+aes_off,plen-aes_off);
229 /* calculate HMAC and append it to payload */
230 SHA1_Final(out+plen,&key->md);
232 SHA1_Update(&key->md,out+plen,SHA_DIGEST_LENGTH);
233 SHA1_Final(out+plen,&key->md);
235 /* pad the payload|hmac */
236 plen += SHA_DIGEST_LENGTH;
237 for (l=len-plen-1;plen<len;plen++) out[plen]=l;
238 /* encrypt HMAC|padding at once */
239 aesni_cbc_encrypt(out+aes_off,out+aes_off,len-aes_off,
242 aesni_cbc_encrypt(in+aes_off,out+aes_off,len-aes_off,
246 union { unsigned int u[SHA_DIGEST_LENGTH/sizeof(unsigned int)];
247 unsigned char c[SHA_DIGEST_LENGTH]; } mac;
249 /* decrypt HMAC|padding at once */
250 aesni_cbc_encrypt(in,out,len,
253 if (plen) { /* "TLS" mode of operation */
254 size_t inp_len, mask, j, i;
255 unsigned int res, maxpad, pad, bitlen;
257 union { unsigned int u[SHA_LBLOCK];
258 unsigned char c[SHA_CBLOCK]; }
259 *data = (void *)key->md.data;
261 if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3])
265 if (len<(iv+SHA_DIGEST_LENGTH+1))
268 /* omit explicit iv */
272 /* figure out payload length */
274 maxpad = len-(SHA_DIGEST_LENGTH+1);
275 maxpad |= (255-maxpad)>>(sizeof(maxpad)*8-8);
278 inp_len = len - (SHA_DIGEST_LENGTH+pad+1);
279 mask = (0-((inp_len-len)>>(sizeof(inp_len)*8-1)));
283 key->aux.tls_aad[plen-2] = inp_len>>8;
284 key->aux.tls_aad[plen-1] = inp_len;
288 SHA1_Update(&key->md,key->aux.tls_aad,plen);
291 len -= SHA_DIGEST_LENGTH; /* amend mac */
292 if (len>=(256+SHA_CBLOCK)) {
293 j = (len-(256+SHA_CBLOCK))&(0-SHA_CBLOCK);
294 j += SHA_CBLOCK-key->md.num;
295 SHA1_Update(&key->md,out,j);
301 /* but pretend as if we hashed padded payload */
302 bitlen = key->md.Nl+(inp_len<<3); /* at most 18 bits */
304 mac.c[1] = (unsigned char)(bitlen>>16);
305 mac.c[2] = (unsigned char)(bitlen>>8);
306 mac.c[3] = (unsigned char)bitlen;
315 for (res=key->md.num, j=0;j<len;j++) {
317 mask = (j-inp_len)>>(sizeof(j)*8-8);
319 c |= 0x80&~mask&~((inp_len-j)>>(sizeof(j)*8-8));
320 data->c[res++]=(unsigned char)c;
322 if (res!=SHA_CBLOCK) continue;
324 mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
325 data->u[SHA_LBLOCK-1] |= bitlen&mask;
326 sha1_block_data_order(&key->md,data,1);
327 mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
328 mac.u[0] |= key->md.h0 & mask;
329 mac.u[1] |= key->md.h1 & mask;
330 mac.u[2] |= key->md.h2 & mask;
331 mac.u[3] |= key->md.h3 & mask;
332 mac.u[4] |= key->md.h4 & mask;
336 for(i=res;i<SHA_CBLOCK;i++,j++) data->c[i]=0;
338 if (res>SHA_CBLOCK-8) {
339 mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
340 data->u[SHA_LBLOCK-1] |= bitlen&mask;
341 sha1_block_data_order(&key->md,data,1);
342 mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
343 mac.u[0] |= key->md.h0 & mask;
344 mac.u[1] |= key->md.h1 & mask;
345 mac.u[2] |= key->md.h2 & mask;
346 mac.u[3] |= key->md.h3 & mask;
347 mac.u[4] |= key->md.h4 & mask;
349 memset(data,0,SHA_CBLOCK);
352 data->u[SHA_LBLOCK-1] = bitlen;
353 sha1_block_data_order(&key->md,data,1);
354 mask = 0-((j-inp_len-73)>>(sizeof(j)*8-1));
355 mac.u[0] |= key->md.h0 & mask;
356 mac.u[1] |= key->md.h1 & mask;
357 mac.u[2] |= key->md.h2 & mask;
358 mac.u[3] |= key->md.h3 & mask;
359 mac.u[4] |= key->md.h4 & mask;
362 mac.u[0] = BSWAP(mac.u[0]);
363 mac.u[1] = BSWAP(mac.u[1]);
364 mac.u[2] = BSWAP(mac.u[2]);
365 mac.u[3] = BSWAP(mac.u[3]);
366 mac.u[4] = BSWAP(mac.u[4]);
370 mac.c[4*i+0]=(unsigned char)(res>>24);
371 mac.c[4*i+1]=(unsigned char)(res>>16);
372 mac.c[4*i+2]=(unsigned char)(res>>8);
373 mac.c[4*i+3]=(unsigned char)res;
376 len += SHA_DIGEST_LENGTH;
378 SHA1_Update(&key->md,out,inp_len);
380 SHA1_Final(mac.c,&key->md);
383 unsigned int inp_blocks, pad_blocks;
385 /* but pretend as if we hashed padded payload */
386 inp_blocks = 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
387 res += (unsigned int)(len-inp_len);
388 pad_blocks = res / SHA_CBLOCK;
390 pad_blocks += 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
391 for (;inp_blocks<pad_blocks;inp_blocks++)
392 sha1_block_data_order(&key->md,data,1);
396 SHA1_Update(&key->md,mac.c,SHA_DIGEST_LENGTH);
397 SHA1_Final(mac.c,&key->md);
404 unsigned char *p = out+len-1-maxpad-SHA_DIGEST_LENGTH;
406 unsigned int c, cmask;
408 maxpad += SHA_DIGEST_LENGTH;
409 for (res=0,i=0,j=0;j<maxpad;j++) {
411 cmask = ((int)(j-off-SHA_DIGEST_LENGTH))>>(sizeof(int)*8-1);
412 res |= (c^pad)&~cmask; /* ... and padding */
413 cmask &= ((int)(off-1-j))>>(sizeof(int)*8-1);
414 res |= (c^mac.c[i])&cmask;
417 maxpad -= SHA_DIGEST_LENGTH;
419 res = 0-((0-res)>>(sizeof(res)*8-1));
423 for (res=0,i=0;i<SHA_DIGEST_LENGTH;i++)
424 res |= out[i]^mac.c[i];
425 res = 0-((0-res)>>(sizeof(res)*8-1));
429 pad = (pad&~res) | (maxpad&res);
431 for (res=0,i=0;i<pad;i++)
434 res = (0-res)>>(sizeof(res)*8-1);
439 SHA1_Update(&key->md,out,len);
446 static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
448 EVP_AES_HMAC_SHA1 *key = data(ctx);
452 case EVP_CTRL_AEAD_SET_MAC_KEY:
455 unsigned char hmac_key[64];
457 memset (hmac_key,0,sizeof(hmac_key));
459 if (arg > (int)sizeof(hmac_key)) {
460 SHA1_Init(&key->head);
461 SHA1_Update(&key->head,ptr,arg);
462 SHA1_Final(hmac_key,&key->head);
464 memcpy(hmac_key,ptr,arg);
467 for (i=0;i<sizeof(hmac_key);i++)
468 hmac_key[i] ^= 0x36; /* ipad */
469 SHA1_Init(&key->head);
470 SHA1_Update(&key->head,hmac_key,sizeof(hmac_key));
472 for (i=0;i<sizeof(hmac_key);i++)
473 hmac_key[i] ^= 0x36^0x5c; /* opad */
474 SHA1_Init(&key->tail);
475 SHA1_Update(&key->tail,hmac_key,sizeof(hmac_key));
477 OPENSSL_cleanse(hmac_key,sizeof(hmac_key));
481 case EVP_CTRL_AEAD_TLS1_AAD:
483 unsigned char *p=ptr;
484 unsigned int len=p[arg-2]<<8|p[arg-1];
488 key->payload_length = len;
489 if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) {
490 len -= AES_BLOCK_SIZE;
495 SHA1_Update(&key->md,p,arg);
497 return (int)(((len+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)
502 if (arg>13) arg = 13;
503 memcpy(key->aux.tls_aad,ptr,arg);
504 key->payload_length = arg;
506 return SHA_DIGEST_LENGTH;
514 static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher =
516 #ifdef NID_aes_128_cbc_hmac_sha1
517 NID_aes_128_cbc_hmac_sha1,
522 EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER,
523 aesni_cbc_hmac_sha1_init_key,
524 aesni_cbc_hmac_sha1_cipher,
526 sizeof(EVP_AES_HMAC_SHA1),
527 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
528 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
529 aesni_cbc_hmac_sha1_ctrl,
533 static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher =
535 #ifdef NID_aes_256_cbc_hmac_sha1
536 NID_aes_256_cbc_hmac_sha1,
541 EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER,
542 aesni_cbc_hmac_sha1_init_key,
543 aesni_cbc_hmac_sha1_cipher,
545 sizeof(EVP_AES_HMAC_SHA1),
546 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
547 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
548 aesni_cbc_hmac_sha1_ctrl,
552 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
554 return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
555 &aesni_128_cbc_hmac_sha1_cipher:NULL);
558 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
560 return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
561 &aesni_256_cbc_hmac_sha1_cipher:NULL);
564 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
568 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)