1 /* ====================================================================
2 * Copyright (c) 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 * 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 extern unsigned int OPENSSL_ia32cap_P[2];
93 #define AESNI_CAPABLE (1<<(57-32))
95 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
97 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
100 void aesni_cbc_encrypt(const unsigned char *in,
104 unsigned char *ivec, int enc);
106 void aesni_cbc_sha1_enc (const void *inp, void *out, size_t blocks,
107 const AES_KEY *key, unsigned char iv[16],
108 SHA_CTX *ctx,const void *in0);
110 #define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data)
112 static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
113 const unsigned char *inkey,
114 const unsigned char *iv, int enc)
116 EVP_AES_HMAC_SHA1 *key = data(ctx);
120 ret=aesni_set_encrypt_key(inkey,ctx->key_len*8,&key->ks);
122 ret=aesni_set_decrypt_key(inkey,ctx->key_len*8,&key->ks);
124 SHA1_Init(&key->head); /* handy when benchmarking */
125 key->tail = key->head;
128 key->payload_length = NO_PAYLOAD_LENGTH;
133 #define STITCHED_CALL
135 #if !defined(STITCHED_CALL)
139 void sha1_block_data_order (void *c,const void *p,size_t len);
141 static void sha1_update(SHA_CTX *c,const void *data,size_t len)
142 { const unsigned char *ptr = data;
145 if ((res = c->num)) {
146 res = SHA_CBLOCK-res;
147 if (len<res) res=len;
148 SHA1_Update (c,ptr,res);
153 res = len % SHA_CBLOCK;
157 sha1_block_data_order(c,ptr,len/SHA_CBLOCK);
162 if (c->Nl<(unsigned int)len) c->Nh++;
166 SHA1_Update(c,ptr,res);
169 #define SHA1_Update sha1_update
171 static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
172 const unsigned char *in, size_t len)
174 EVP_AES_HMAC_SHA1 *key = data(ctx);
176 size_t plen = key->payload_length,
177 iv = 0, /* explicit IV in TLS 1.1 and later */
179 #if defined(STITCHED_CALL)
183 sha_off = SHA_CBLOCK-key->md.num;
186 if (len%AES_BLOCK_SIZE) return 0;
189 if (plen==NO_PAYLOAD_LENGTH)
191 else if (len!=((plen+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE))
193 else if (key->aux.tls_ver >= TLS1_1_VERSION)
196 #if defined(STITCHED_CALL)
197 if (plen>(sha_off+iv) && (blocks=(plen-(sha_off+iv))/SHA_CBLOCK)) {
198 SHA1_Update(&key->md,in+iv,sha_off);
200 aesni_cbc_sha1_enc(in,out,blocks,&key->ks,
201 ctx->iv,&key->md,in+iv+sha_off);
202 blocks *= SHA_CBLOCK;
205 key->md.Nh += blocks>>29;
206 key->md.Nl += blocks<<=3;
207 if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
213 SHA1_Update(&key->md,in+sha_off,plen-sha_off);
215 if (plen!=len) { /* "TLS" mode of operation */
217 memcpy(out+aes_off,in+aes_off,plen-aes_off);
219 /* calculate HMAC and append it to payload */
220 SHA1_Final(out+plen,&key->md);
222 SHA1_Update(&key->md,out+plen,SHA_DIGEST_LENGTH);
223 SHA1_Final(out+plen,&key->md);
225 /* pad the payload|hmac */
226 plen += SHA_DIGEST_LENGTH;
227 for (l=len-plen-1;plen<len;plen++) out[plen]=l;
228 /* encrypt HMAC|padding at once */
229 aesni_cbc_encrypt(out+aes_off,out+aes_off,len-aes_off,
232 aesni_cbc_encrypt(in+aes_off,out+aes_off,len-aes_off,
236 unsigned char mac[SHA_DIGEST_LENGTH];
238 /* decrypt HMAC|padding at once */
239 aesni_cbc_encrypt(in,out,len,
242 if (plen) { /* "TLS" mode of operation */
243 /* figure out payload length */
244 if (len<(size_t)(out[len-1]+1+SHA_DIGEST_LENGTH))
247 len -= (out[len-1]+1+SHA_DIGEST_LENGTH);
249 if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3])
251 len -= AES_BLOCK_SIZE;
255 key->aux.tls_aad[plen-2] = len>>8;
256 key->aux.tls_aad[plen-1] = len;
258 /* calculate HMAC and verify it */
260 SHA1_Update(&key->md,key->aux.tls_aad,plen);
261 SHA1_Update(&key->md,out+iv,len);
262 SHA1_Final(mac,&key->md);
265 SHA1_Update(&key->md,mac,SHA_DIGEST_LENGTH);
266 SHA1_Final(mac,&key->md);
268 if (memcmp(out+iv+len,mac,SHA_DIGEST_LENGTH))
271 SHA1_Update(&key->md,out,len);
275 key->payload_length = NO_PAYLOAD_LENGTH;
280 static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
282 EVP_AES_HMAC_SHA1 *key = data(ctx);
286 case EVP_CTRL_AEAD_SET_MAC_KEY:
289 unsigned char hmac_key[64];
291 memset (hmac_key,0,sizeof(hmac_key));
293 if (arg > (int)sizeof(hmac_key)) {
294 SHA1_Init(&key->head);
295 SHA1_Update(&key->head,ptr,arg);
296 SHA1_Final(hmac_key,&key->head);
298 memcpy(hmac_key,ptr,arg);
301 for (i=0;i<sizeof(hmac_key);i++)
302 hmac_key[i] ^= 0x36; /* ipad */
303 SHA1_Init(&key->head);
304 SHA1_Update(&key->head,hmac_key,sizeof(hmac_key));
306 for (i=0;i<sizeof(hmac_key);i++)
307 hmac_key[i] ^= 0x36^0x5c; /* opad */
308 SHA1_Init(&key->tail);
309 SHA1_Update(&key->tail,hmac_key,sizeof(hmac_key));
313 case EVP_CTRL_AEAD_TLS1_AAD:
315 unsigned char *p=ptr;
316 unsigned int len=p[arg-2]<<8|p[arg-1];
320 key->payload_length = len;
321 if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) {
322 len -= AES_BLOCK_SIZE;
327 SHA1_Update(&key->md,p,arg);
329 return (int)(((len+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)
334 if (arg>13) arg = 13;
335 memcpy(key->aux.tls_aad,ptr,arg);
336 key->payload_length = arg;
338 return SHA_DIGEST_LENGTH;
346 static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher =
348 #ifdef NID_aes_128_cbc_hmac_sha1
349 NID_aes_128_cbc_hmac_sha1,
354 EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER,
355 aesni_cbc_hmac_sha1_init_key,
356 aesni_cbc_hmac_sha1_cipher,
358 sizeof(EVP_AES_HMAC_SHA1),
359 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
360 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
361 aesni_cbc_hmac_sha1_ctrl,
365 static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher =
367 #ifdef NID_aes_256_cbc_hmac_sha1
368 NID_aes_256_cbc_hmac_sha1,
373 EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER,
374 aesni_cbc_hmac_sha1_init_key,
375 aesni_cbc_hmac_sha1_cipher,
377 sizeof(EVP_AES_HMAC_SHA1),
378 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
379 EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
380 aesni_cbc_hmac_sha1_ctrl,
384 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
386 return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
387 &aesni_128_cbc_hmac_sha1_cipher:NULL);
390 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
392 return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
393 &aesni_256_cbc_hmac_sha1_cipher:NULL);
396 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
400 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)