-/* ====================================================================
- * Copyright (c) 2011-2013 The OpenSSL Project. All rights reserved.
+/*
+ * Copyright 2011-2016 The OpenSSL Project Authors. 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.
- * ====================================================================
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <openssl/opensslconf.h>
#include "internal/evp_int.h"
#include "internal/constant_time_locl.h"
-#ifndef EVP_CIPH_FLAG_AEAD_CIPHER
-# define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
-# define EVP_CTRL_AEAD_TLS1_AAD 0x16
-# define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
-#endif
-
-#if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1)
-# define EVP_CIPH_FLAG_DEFAULT_ASN1 0
-#endif
-
-#if !defined(EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK)
-# define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0
-#endif
-
-#define TLS1_1_VERSION 0x0302
-
typedef struct {
AES_KEY ks;
SHA_CTX head, tail, md;
# endif
# define SHA1_Update sha1_update
-# if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
+# if !defined(OPENSSL_NO_MULTIBLOCK)
typedef struct {
unsigned int A[8], B[8], C[8], D[8], E[8];
maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
maxpad &= 255;
- ret &= constant_time_ge(maxpad, pad);
+ mask = constant_time_ge(maxpad, pad);
+ ret &= mask;
+ /*
+ * If pad is invalid then we will fail the above test but we must
+ * continue anyway because we are in constant time code. However,
+ * we'll use the maxpad value instead of the supplied pad to make
+ * sure we perform well defined pointer arithmetic.
+ */
+ pad = constant_time_select(mask, pad, maxpad);
inp_len = len - (SHA_DIGEST_LENGTH + pad + 1);
- mask = (0 - ((inp_len - len) >> (sizeof(inp_len) * 8 - 1)));
- inp_len &= mask;
- ret &= (int)mask;
key->aux.tls_aad[plen - 2] = inp_len >> 8;
key->aux.tls_aad[plen - 1] = inp_len;
}
# endif
-# if 1
+# if 1 /* see original reference version in #else */
len -= SHA_DIGEST_LENGTH; /* amend mac */
if (len >= (256 + SHA_CBLOCK)) {
j = (len - (256 + SHA_CBLOCK)) & (0 - SHA_CBLOCK);
}
# endif
len += SHA_DIGEST_LENGTH;
-# else
+# else /* pre-lucky-13 reference version of above */
SHA1_Update(&key->md, out, inp_len);
res = key->md.num;
SHA1_Final(pmac->c, &key->md);
/* verify HMAC */
out += inp_len;
len -= inp_len;
-# if 1
+# if 1 /* see original reference version in #else */
{
unsigned char *p = out + len - 1 - maxpad - SHA_DIGEST_LENGTH;
size_t off = out - p;
res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
ret &= (int)~res;
}
-# else
+# else /* pre-lucky-13 reference version of above */
for (res = 0, i = 0; i < SHA_DIGEST_LENGTH; i++)
res |= out[i] ^ pmac->c[i];
res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
if (arg != EVP_AEAD_TLS1_AAD_LEN)
return -1;
-
+
len = p[arg - 2] << 8 | p[arg - 1];
if (EVP_CIPHER_CTX_encrypting(ctx)) {
key->payload_length = len;
if ((key->aux.tls_ver =
p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
+ if (len < AES_BLOCK_SIZE)
+ return 0;
len -= AES_BLOCK_SIZE;
p[arg - 2] = len >> 8;
p[arg - 1] = len;
return SHA_DIGEST_LENGTH;
}
}
-# if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
+# if !defined(OPENSSL_NO_MULTIBLOCK)
case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
return (int)(5 + 16 + ((arg + 20 + 16) & -16));
case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
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