596 lines
19 KiB
C
596 lines
19 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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# 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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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, 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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{
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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)
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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)
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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, iv = 0, /* explicit IV in TLS 1.1 and
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* 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, 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)
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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 !=
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((plen + SHA_DIGEST_LENGTH +
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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)
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&& (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)
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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++)
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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 {
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unsigned int u[SHA_DIGEST_LENGTH / sizeof(unsigned int)];
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unsigned char c[32 + SHA_DIGEST_LENGTH];
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} 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, &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 {
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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)
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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++)
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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 =
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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 +=
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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 =
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((int)(j - off - SHA_DIGEST_LENGTH)) >> (sizeof(int) *
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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,
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void *ptr)
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{
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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));
|
|
|
|
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
|