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