ac32a77cd6
Pointed out by Victor Vasiliev (vasilvv@mit.edu) via Adam Langley
(Google).
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 1e4a355dca)
308 lines
9.9 KiB
C
308 lines
9.9 KiB
C
/* ====================================================================
|
|
* Copyright (c) 2011 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*/
|
|
|
|
#include <openssl/opensslconf.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_MD5)
|
|
|
|
# include <openssl/crypto.h>
|
|
# include <openssl/evp.h>
|
|
# include <openssl/objects.h>
|
|
# include <openssl/rc4.h>
|
|
# include <openssl/md5.h>
|
|
|
|
# ifndef EVP_CIPH_FLAG_AEAD_CIPHER
|
|
# define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
|
|
# define EVP_CTRL_AEAD_TLS1_AAD 0x16
|
|
# define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
|
|
# endif
|
|
|
|
/* FIXME: surely this is available elsewhere? */
|
|
# define EVP_RC4_KEY_SIZE 16
|
|
|
|
typedef struct {
|
|
RC4_KEY ks;
|
|
MD5_CTX head, tail, md;
|
|
size_t payload_length;
|
|
} EVP_RC4_HMAC_MD5;
|
|
|
|
# define NO_PAYLOAD_LENGTH ((size_t)-1)
|
|
|
|
void rc4_md5_enc(RC4_KEY *key, const void *in0, void *out,
|
|
MD5_CTX *ctx, const void *inp, size_t blocks);
|
|
|
|
# define data(ctx) ((EVP_RC4_HMAC_MD5 *)(ctx)->cipher_data)
|
|
|
|
static int rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx,
|
|
const unsigned char *inkey,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
EVP_RC4_HMAC_MD5 *key = data(ctx);
|
|
|
|
RC4_set_key(&key->ks, EVP_CIPHER_CTX_key_length(ctx), inkey);
|
|
|
|
MD5_Init(&key->head); /* handy when benchmarking */
|
|
key->tail = key->head;
|
|
key->md = key->head;
|
|
|
|
key->payload_length = NO_PAYLOAD_LENGTH;
|
|
|
|
return 1;
|
|
}
|
|
|
|
# if !defined(OPENSSL_NO_ASM) && ( \
|
|
defined(__x86_64) || defined(__x86_64__) || \
|
|
defined(_M_AMD64) || defined(_M_X64) || \
|
|
defined(__INTEL__) ) && \
|
|
!(defined(__APPLE__) && defined(__MACH__))
|
|
# define STITCHED_CALL
|
|
# endif
|
|
|
|
# if !defined(STITCHED_CALL)
|
|
# define rc4_off 0
|
|
# define md5_off 0
|
|
# endif
|
|
|
|
static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t len)
|
|
{
|
|
EVP_RC4_HMAC_MD5 *key = data(ctx);
|
|
# if defined(STITCHED_CALL)
|
|
size_t rc4_off = 32 - 1 - (key->ks.x & (32 - 1)), /* 32 is $MOD from
|
|
* rc4_md5-x86_64.pl */
|
|
md5_off = MD5_CBLOCK - key->md.num, blocks;
|
|
unsigned int l;
|
|
extern unsigned int OPENSSL_ia32cap_P[];
|
|
# endif
|
|
size_t plen = key->payload_length;
|
|
|
|
if (plen != NO_PAYLOAD_LENGTH && len != (plen + MD5_DIGEST_LENGTH))
|
|
return 0;
|
|
|
|
if (ctx->encrypt) {
|
|
if (plen == NO_PAYLOAD_LENGTH)
|
|
plen = len;
|
|
# if defined(STITCHED_CALL)
|
|
/* cipher has to "fall behind" */
|
|
if (rc4_off > md5_off)
|
|
md5_off += MD5_CBLOCK;
|
|
|
|
if (plen > md5_off && (blocks = (plen - md5_off) / MD5_CBLOCK) &&
|
|
(OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
|
|
MD5_Update(&key->md, in, md5_off);
|
|
RC4(&key->ks, rc4_off, in, out);
|
|
|
|
rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
|
|
&key->md, in + md5_off, blocks);
|
|
blocks *= MD5_CBLOCK;
|
|
rc4_off += blocks;
|
|
md5_off += blocks;
|
|
key->md.Nh += blocks >> 29;
|
|
key->md.Nl += blocks <<= 3;
|
|
if (key->md.Nl < (unsigned int)blocks)
|
|
key->md.Nh++;
|
|
} else {
|
|
rc4_off = 0;
|
|
md5_off = 0;
|
|
}
|
|
# endif
|
|
MD5_Update(&key->md, in + md5_off, plen - md5_off);
|
|
|
|
if (plen != len) { /* "TLS" mode of operation */
|
|
if (in != out)
|
|
memcpy(out + rc4_off, in + rc4_off, plen - rc4_off);
|
|
|
|
/* calculate HMAC and append it to payload */
|
|
MD5_Final(out + plen, &key->md);
|
|
key->md = key->tail;
|
|
MD5_Update(&key->md, out + plen, MD5_DIGEST_LENGTH);
|
|
MD5_Final(out + plen, &key->md);
|
|
/* encrypt HMAC at once */
|
|
RC4(&key->ks, len - rc4_off, out + rc4_off, out + rc4_off);
|
|
} else {
|
|
RC4(&key->ks, len - rc4_off, in + rc4_off, out + rc4_off);
|
|
}
|
|
} else {
|
|
unsigned char mac[MD5_DIGEST_LENGTH];
|
|
# if defined(STITCHED_CALL)
|
|
/* digest has to "fall behind" */
|
|
if (md5_off > rc4_off)
|
|
rc4_off += 2 * MD5_CBLOCK;
|
|
else
|
|
rc4_off += MD5_CBLOCK;
|
|
|
|
if (len > rc4_off && (blocks = (len - rc4_off) / MD5_CBLOCK) &&
|
|
(OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
|
|
RC4(&key->ks, rc4_off, in, out);
|
|
MD5_Update(&key->md, out, md5_off);
|
|
|
|
rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
|
|
&key->md, out + md5_off, blocks);
|
|
blocks *= MD5_CBLOCK;
|
|
rc4_off += blocks;
|
|
md5_off += blocks;
|
|
l = (key->md.Nl + (blocks << 3)) & 0xffffffffU;
|
|
if (l < key->md.Nl)
|
|
key->md.Nh++;
|
|
key->md.Nl = l;
|
|
key->md.Nh += blocks >> 29;
|
|
} else {
|
|
md5_off = 0;
|
|
rc4_off = 0;
|
|
}
|
|
# endif
|
|
/* decrypt HMAC at once */
|
|
RC4(&key->ks, len - rc4_off, in + rc4_off, out + rc4_off);
|
|
if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
|
|
MD5_Update(&key->md, out + md5_off, plen - md5_off);
|
|
|
|
/* calculate HMAC and verify it */
|
|
MD5_Final(mac, &key->md);
|
|
key->md = key->tail;
|
|
MD5_Update(&key->md, mac, MD5_DIGEST_LENGTH);
|
|
MD5_Final(mac, &key->md);
|
|
|
|
if (CRYPTO_memcmp(out + plen, mac, MD5_DIGEST_LENGTH))
|
|
return 0;
|
|
} else {
|
|
MD5_Update(&key->md, out + md5_off, len - md5_off);
|
|
}
|
|
}
|
|
|
|
key->payload_length = NO_PAYLOAD_LENGTH;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
|
|
void *ptr)
|
|
{
|
|
EVP_RC4_HMAC_MD5 *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)) {
|
|
MD5_Init(&key->head);
|
|
MD5_Update(&key->head, ptr, arg);
|
|
MD5_Final(hmac_key, &key->head);
|
|
} else {
|
|
memcpy(hmac_key, ptr, arg);
|
|
}
|
|
|
|
for (i = 0; i < sizeof(hmac_key); i++)
|
|
hmac_key[i] ^= 0x36; /* ipad */
|
|
MD5_Init(&key->head);
|
|
MD5_Update(&key->head, hmac_key, sizeof(hmac_key));
|
|
|
|
for (i = 0; i < sizeof(hmac_key); i++)
|
|
hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
|
|
MD5_Init(&key->tail);
|
|
MD5_Update(&key->tail, hmac_key, sizeof(hmac_key));
|
|
|
|
return 1;
|
|
}
|
|
case EVP_CTRL_AEAD_TLS1_AAD:
|
|
{
|
|
unsigned char *p = ptr;
|
|
unsigned int len;
|
|
|
|
if (arg != EVP_AEAD_TLS1_AAD_LEN)
|
|
return -1;
|
|
|
|
len = p[arg - 2] << 8 | p[arg - 1];
|
|
|
|
if (!ctx->encrypt) {
|
|
len -= MD5_DIGEST_LENGTH;
|
|
p[arg - 2] = len >> 8;
|
|
p[arg - 1] = len;
|
|
}
|
|
key->payload_length = len;
|
|
key->md = key->head;
|
|
MD5_Update(&key->md, p, arg);
|
|
|
|
return MD5_DIGEST_LENGTH;
|
|
}
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static EVP_CIPHER r4_hmac_md5_cipher = {
|
|
# ifdef NID_rc4_hmac_md5
|
|
NID_rc4_hmac_md5,
|
|
# else
|
|
NID_undef,
|
|
# endif
|
|
1, EVP_RC4_KEY_SIZE, 0,
|
|
EVP_CIPH_STREAM_CIPHER | EVP_CIPH_VARIABLE_LENGTH |
|
|
EVP_CIPH_FLAG_AEAD_CIPHER,
|
|
rc4_hmac_md5_init_key,
|
|
rc4_hmac_md5_cipher,
|
|
NULL,
|
|
sizeof(EVP_RC4_HMAC_MD5),
|
|
NULL,
|
|
NULL,
|
|
rc4_hmac_md5_ctrl,
|
|
NULL
|
|
};
|
|
|
|
const EVP_CIPHER *EVP_rc4_hmac_md5(void)
|
|
{
|
|
return (&r4_hmac_md5_cipher);
|
|
}
|
|
#endif
|