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- /* ====================================================================
- * Copyright (c) 2011 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- */
- #include <openssl/opensslconf.h>
- #include <stdio.h>
- #include <string.h>
- #if !defined(OPENSSL_NO_AES) && !defined(OPENSSL_NO_SHA1)
- #include <openssl/evp.h>
- #include <openssl/objects.h>
- #include <openssl/aes.h>
- #include <openssl/sha.h>
- #ifndef EVP_CIPH_FLAG_AEAD_CIPHER
- #define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
- #define EVP_CTRL_AEAD_TLS1_AAD 0x16
- #define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
- #endif
- #if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1)
- #define EVP_CIPH_FLAG_DEFAULT_ASN1 0
- #endif
- #define TLS1_1_VERSION 0x0302
- typedef struct
- {
- AES_KEY ks;
- SHA_CTX head,tail,md;
- size_t payload_length; /* AAD length in decrypt case */
- union {
- unsigned int tls_ver;
- unsigned char tls_aad[16]; /* 13 used */
- } aux;
- } EVP_AES_HMAC_SHA1;
- #if defined(AES_ASM) && ( \
- defined(__x86_64) || defined(__x86_64__) || \
- defined(_M_AMD64) || defined(_M_X64) || \
- defined(__INTEL__) )
- extern unsigned int OPENSSL_ia32cap_P[2];
- #define AESNI_CAPABLE (1<<(57-32))
- int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
- AES_KEY *key);
- int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
- AES_KEY *key);
- void aesni_cbc_encrypt(const unsigned char *in,
- unsigned char *out,
- size_t length,
- const AES_KEY *key,
- unsigned char *ivec, int enc);
- void aesni_cbc_sha1_enc (const void *inp, void *out, size_t blocks,
- const AES_KEY *key, unsigned char iv[16],
- SHA_CTX *ctx,const void *in0);
- #define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data)
- static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
- const unsigned char *inkey,
- const unsigned char *iv, int enc)
- {
- EVP_AES_HMAC_SHA1 *key = data(ctx);
- int ret;
- if (enc)
- ret=aesni_set_encrypt_key(inkey,ctx->key_len*8,&key->ks);
- else
- ret=aesni_set_decrypt_key(inkey,ctx->key_len*8,&key->ks);
- SHA1_Init(&key->head); /* handy when benchmarking */
- key->tail = key->head;
- key->md = key->head;
- key->payload_length = 0;
- return ret<0?0:1;
- }
- #define STITCHED_CALL
- #if !defined(STITCHED_CALL)
- #define aes_off 0
- #endif
- void sha1_block_data_order (void *c,const void *p,size_t len);
- static void sha1_update(SHA_CTX *c,const void *data,size_t len)
- { const unsigned char *ptr = data;
- size_t res;
- if ((res = c->num)) {
- res = SHA_CBLOCK-res;
- if (len<res) res=len;
- SHA1_Update (c,ptr,res);
- ptr += res;
- len -= res;
- }
- res = len % SHA_CBLOCK;
- len -= res;
- if (len) {
- sha1_block_data_order(c,ptr,len/SHA_CBLOCK);
- ptr += len;
- c->Nh += len>>29;
- c->Nl += len<<=3;
- if (c->Nl<(unsigned int)len) c->Nh++;
- }
- if (res)
- SHA1_Update(c,ptr,res);
- }
- #define SHA1_Update sha1_update
- static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t len)
- {
- EVP_AES_HMAC_SHA1 *key = data(ctx);
- unsigned int l;
- size_t plen = key->payload_length,
- iv = 0, /* explicit IV in TLS 1.1 and later */
- sha_off = 0;
- #if defined(STITCHED_CALL)
- size_t aes_off = 0,
- blocks;
- sha_off = SHA_CBLOCK-key->md.num;
- #endif
- if (len%AES_BLOCK_SIZE) return 0;
- if (ctx->encrypt) {
- if (plen==0)
- plen = len;
- else if (len!=((plen+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE))
- return 0;
- else if (key->aux.tls_ver >= TLS1_1_VERSION)
- iv = AES_BLOCK_SIZE;
- #if defined(STITCHED_CALL)
- if (plen>(sha_off+iv) && (blocks=(plen-(sha_off+iv))/SHA_CBLOCK)) {
- SHA1_Update(&key->md,in+iv,sha_off);
- aesni_cbc_sha1_enc(in,out,blocks,&key->ks,
- ctx->iv,&key->md,in+iv+sha_off);
- blocks *= SHA_CBLOCK;
- aes_off += blocks;
- sha_off += blocks;
- key->md.Nh += blocks>>29;
- key->md.Nl += blocks<<=3;
- if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
- } else {
- sha_off = 0;
- }
- #endif
- sha_off += iv;
- SHA1_Update(&key->md,in+sha_off,plen-sha_off);
- if (plen!=len) { /* "TLS" mode of operation */
- if (in!=out)
- memcpy(out+aes_off,in+aes_off,plen-aes_off);
- /* calculate HMAC and append it to payload */
- SHA1_Final(out+plen,&key->md);
- key->md = key->tail;
- SHA1_Update(&key->md,out+plen,SHA_DIGEST_LENGTH);
- SHA1_Final(out+plen,&key->md);
- /* pad the payload|hmac */
- plen += SHA_DIGEST_LENGTH;
- for (l=len-plen-1;plen<len;plen++) out[plen]=l;
- /* encrypt HMAC|padding at once */
- aesni_cbc_encrypt(out+aes_off,out+aes_off,len-aes_off,
- &key->ks,ctx->iv,1);
- } else {
- aesni_cbc_encrypt(in+aes_off,out+aes_off,len-aes_off,
- &key->ks,ctx->iv,1);
- }
- } else {
- unsigned char mac[SHA_DIGEST_LENGTH];
- /* decrypt HMAC|padding at once */
- aesni_cbc_encrypt(in,out,len,
- &key->ks,ctx->iv,0);
- if (plen) { /* "TLS" mode of operation */
- /* figure out payload length */
- if (len<(size_t)(out[len-1]+1+SHA_DIGEST_LENGTH))
- return 0;
- len -= (out[len-1]+1+SHA_DIGEST_LENGTH);
- if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3])
- >= TLS1_1_VERSION) {
- len -= AES_BLOCK_SIZE;
- iv = AES_BLOCK_SIZE;
- }
- key->aux.tls_aad[plen-2] = len>>8;
- key->aux.tls_aad[plen-1] = len;
- /* calculate HMAC and verify it */
- key->md = key->head;
- SHA1_Update(&key->md,key->aux.tls_aad,plen);
- SHA1_Update(&key->md,out+iv,len);
- SHA1_Final(mac,&key->md);
- key->md = key->tail;
- SHA1_Update(&key->md,mac,SHA_DIGEST_LENGTH);
- SHA1_Final(mac,&key->md);
- if (memcmp(out+iv+len,mac,SHA_DIGEST_LENGTH))
- return 0;
- } else {
- SHA1_Update(&key->md,out,len);
- }
- }
- key->payload_length = 0;
- return 1;
- }
- static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
- {
- EVP_AES_HMAC_SHA1 *key = data(ctx);
- switch (type)
- {
- case EVP_CTRL_AEAD_SET_MAC_KEY:
- {
- unsigned int i;
- unsigned char hmac_key[64];
- memset (hmac_key,0,sizeof(hmac_key));
- if (arg > (int)sizeof(hmac_key)) {
- SHA1_Init(&key->head);
- SHA1_Update(&key->head,ptr,arg);
- SHA1_Final(hmac_key,&key->head);
- } else {
- memcpy(hmac_key,ptr,arg);
- }
- for (i=0;i<sizeof(hmac_key);i++)
- hmac_key[i] ^= 0x36; /* ipad */
- SHA1_Init(&key->head);
- SHA1_Update(&key->head,hmac_key,sizeof(hmac_key));
- for (i=0;i<sizeof(hmac_key);i++)
- hmac_key[i] ^= 0x36^0x5c; /* opad */
- SHA1_Init(&key->tail);
- SHA1_Update(&key->tail,hmac_key,sizeof(hmac_key));
- return 1;
- }
- case EVP_CTRL_AEAD_TLS1_AAD:
- {
- unsigned char *p=ptr;
- unsigned int len=p[arg-2]<<8|p[arg-1];
- if (ctx->encrypt)
- {
- key->payload_length = len;
- if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) {
- len -= AES_BLOCK_SIZE;
- p[arg-2] = len>>8;
- p[arg-1] = len;
- }
- key->md = key->head;
- SHA1_Update(&key->md,p,arg);
- return (int)(((len+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)
- - len);
- }
- else
- {
- if (arg>13) arg = 13;
- memcpy(key->aux.tls_aad,ptr,arg);
- key->payload_length = arg;
- return SHA_DIGEST_LENGTH;
- }
- }
- default:
- return -1;
- }
- }
- static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher =
- {
- #ifdef NID_aes_128_cbc_hmac_sha1
- NID_aes_128_cbc_hmac_sha1,
- #else
- NID_undef,
- #endif
- 16,16,16,
- EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER,
- aesni_cbc_hmac_sha1_init_key,
- aesni_cbc_hmac_sha1_cipher,
- NULL,
- sizeof(EVP_AES_HMAC_SHA1),
- EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
- EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
- aesni_cbc_hmac_sha1_ctrl,
- NULL
- };
- static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher =
- {
- #ifdef NID_aes_256_cbc_hmac_sha1
- NID_aes_256_cbc_hmac_sha1,
- #else
- NID_undef,
- #endif
- 16,32,16,
- EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER,
- aesni_cbc_hmac_sha1_init_key,
- aesni_cbc_hmac_sha1_cipher,
- NULL,
- sizeof(EVP_AES_HMAC_SHA1),
- EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
- EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
- aesni_cbc_hmac_sha1_ctrl,
- NULL
- };
- const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
- {
- return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
- &aesni_128_cbc_hmac_sha1_cipher:NULL);
- }
- const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
- {
- return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
- &aesni_256_cbc_hmac_sha1_cipher:NULL);
- }
- #else
- const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
- {
- return NULL;
- }
- const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
- {
- return NULL;
- }
- #endif
- #endif
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