580 lines
15 KiB
C
580 lines
15 KiB
C
/* ====================================================================
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* Copyright (c) 2011-2013 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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#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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#if defined(__GNUC__) && __GNUC__>=2 && !defined(PEDANTIC)
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# define BSWAP(x) ({ unsigned int r=(x); asm ("bswapl %0":"=r"(r):"0"(r)); r; })
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#endif
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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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#ifdef SHA1_Update
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#undef SHA1_Update
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#endif
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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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key->payload_length = NO_PAYLOAD_LENGTH;
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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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union { unsigned int u[SHA_DIGEST_LENGTH/sizeof(unsigned int)];
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unsigned char c[32+SHA_DIGEST_LENGTH]; } mac, *pmac;
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/* arrange cache line alignment */
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pmac = (void *)(((size_t)mac.c+31)&((size_t)0-32));
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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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size_t inp_len, mask, j, i;
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unsigned int res, maxpad, pad, bitlen;
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int ret = 1;
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union { unsigned int u[SHA_LBLOCK];
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unsigned char c[SHA_CBLOCK]; }
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*data = (void *)key->md.data;
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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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iv = AES_BLOCK_SIZE;
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if (len<(iv+SHA_DIGEST_LENGTH+1))
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return 0;
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/* omit explicit iv */
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out += iv;
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len -= iv;
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/* figure out payload length */
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pad = out[len-1];
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maxpad = len-(SHA_DIGEST_LENGTH+1);
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maxpad |= (255-maxpad)>>(sizeof(maxpad)*8-8);
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maxpad &= 255;
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inp_len = len - (SHA_DIGEST_LENGTH+pad+1);
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mask = (0-((inp_len-len)>>(sizeof(inp_len)*8-1)));
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inp_len &= mask;
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ret &= (int)mask;
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key->aux.tls_aad[plen-2] = inp_len>>8;
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key->aux.tls_aad[plen-1] = inp_len;
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/* calculate HMAC */
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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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#if 1
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len -= SHA_DIGEST_LENGTH; /* amend mac */
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if (len>=(256+SHA_CBLOCK)) {
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j = (len-(256+SHA_CBLOCK))&(0-SHA_CBLOCK);
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j += SHA_CBLOCK-key->md.num;
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SHA1_Update(&key->md,out,j);
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out += j;
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len -= j;
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inp_len -= j;
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}
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/* but pretend as if we hashed padded payload */
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bitlen = key->md.Nl+(inp_len<<3); /* at most 18 bits */
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#ifdef BSWAP
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bitlen = BSWAP(bitlen);
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#else
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mac.c[0] = 0;
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mac.c[1] = (unsigned char)(bitlen>>16);
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mac.c[2] = (unsigned char)(bitlen>>8);
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mac.c[3] = (unsigned char)bitlen;
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bitlen = mac.u[0];
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#endif
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pmac->u[0]=0;
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pmac->u[1]=0;
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pmac->u[2]=0;
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pmac->u[3]=0;
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pmac->u[4]=0;
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for (res=key->md.num, j=0;j<len;j++) {
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size_t c = out[j];
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mask = (j-inp_len)>>(sizeof(j)*8-8);
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c &= mask;
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c |= 0x80&~mask&~((inp_len-j)>>(sizeof(j)*8-8));
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data->c[res++]=(unsigned char)c;
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if (res!=SHA_CBLOCK) continue;
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/* j is not incremented yet */
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mask = 0-((inp_len+7-j)>>(sizeof(j)*8-1));
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data->u[SHA_LBLOCK-1] |= bitlen&mask;
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sha1_block_data_order(&key->md,data,1);
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mask &= 0-((j-inp_len-72)>>(sizeof(j)*8-1));
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pmac->u[0] |= key->md.h0 & mask;
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pmac->u[1] |= key->md.h1 & mask;
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pmac->u[2] |= key->md.h2 & mask;
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pmac->u[3] |= key->md.h3 & mask;
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pmac->u[4] |= key->md.h4 & mask;
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res=0;
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}
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for(i=res;i<SHA_CBLOCK;i++,j++) data->c[i]=0;
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if (res>SHA_CBLOCK-8) {
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mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
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data->u[SHA_LBLOCK-1] |= bitlen&mask;
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sha1_block_data_order(&key->md,data,1);
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mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
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pmac->u[0] |= key->md.h0 & mask;
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pmac->u[1] |= key->md.h1 & mask;
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pmac->u[2] |= key->md.h2 & mask;
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pmac->u[3] |= key->md.h3 & mask;
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pmac->u[4] |= key->md.h4 & mask;
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memset(data,0,SHA_CBLOCK);
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j+=64;
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}
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data->u[SHA_LBLOCK-1] = bitlen;
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sha1_block_data_order(&key->md,data,1);
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mask = 0-((j-inp_len-73)>>(sizeof(j)*8-1));
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pmac->u[0] |= key->md.h0 & mask;
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pmac->u[1] |= key->md.h1 & mask;
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pmac->u[2] |= key->md.h2 & mask;
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pmac->u[3] |= key->md.h3 & mask;
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pmac->u[4] |= key->md.h4 & mask;
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#ifdef BSWAP
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pmac->u[0] = BSWAP(pmac->u[0]);
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pmac->u[1] = BSWAP(pmac->u[1]);
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pmac->u[2] = BSWAP(pmac->u[2]);
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pmac->u[3] = BSWAP(pmac->u[3]);
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pmac->u[4] = BSWAP(pmac->u[4]);
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#else
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for (i=0;i<5;i++) {
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res = pmac->u[i];
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pmac->c[4*i+0]=(unsigned char)(res>>24);
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pmac->c[4*i+1]=(unsigned char)(res>>16);
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pmac->c[4*i+2]=(unsigned char)(res>>8);
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pmac->c[4*i+3]=(unsigned char)res;
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}
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#endif
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len += SHA_DIGEST_LENGTH;
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#else
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SHA1_Update(&key->md,out,inp_len);
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res = key->md.num;
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SHA1_Final(pmac->c,&key->md);
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{
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unsigned int inp_blocks, pad_blocks;
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/* but pretend as if we hashed padded payload */
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inp_blocks = 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
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res += (unsigned int)(len-inp_len);
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pad_blocks = res / SHA_CBLOCK;
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res %= SHA_CBLOCK;
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pad_blocks += 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
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for (;inp_blocks<pad_blocks;inp_blocks++)
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sha1_block_data_order(&key->md,data,1);
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}
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#endif
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key->md = key->tail;
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SHA1_Update(&key->md,pmac->c,SHA_DIGEST_LENGTH);
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SHA1_Final(pmac->c,&key->md);
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/* verify HMAC */
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out += inp_len;
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len -= inp_len;
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#if 1
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{
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unsigned char *p = out+len-1-maxpad-SHA_DIGEST_LENGTH;
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size_t off = out-p;
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unsigned int c, cmask;
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maxpad += SHA_DIGEST_LENGTH;
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for (res=0,i=0,j=0;j<maxpad;j++) {
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c = p[j];
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cmask = ((int)(j-off-SHA_DIGEST_LENGTH))>>(sizeof(int)*8-1);
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res |= (c^pad)&~cmask; /* ... and padding */
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cmask &= ((int)(off-1-j))>>(sizeof(int)*8-1);
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res |= (c^pmac->c[i])&cmask;
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i += 1&cmask;
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}
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maxpad -= SHA_DIGEST_LENGTH;
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res = 0-((0-res)>>(sizeof(res)*8-1));
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ret &= (int)~res;
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}
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#else
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for (res=0,i=0;i<SHA_DIGEST_LENGTH;i++)
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res |= out[i]^pmac->c[i];
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res = 0-((0-res)>>(sizeof(res)*8-1));
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ret &= (int)~res;
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/* verify padding */
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pad = (pad&~res) | (maxpad&res);
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out = out+len-1-pad;
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for (res=0,i=0;i<pad;i++)
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res |= out[i]^pad;
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res = (0-res)>>(sizeof(res)*8-1);
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ret &= (int)~res;
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#endif
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return ret;
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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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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);
|
|
} 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));
|
|
|
|
OPENSSL_cleanse(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
|