ac9404c3a8
The documentation in md32_common.h is now (more) correct with respect to the most important details of the layout of |HASH_CTX|. The documentation explaining why sha512.c doesn't use md32_common.h is now more accurate as well. Before, the C implementations of HASH_BLOCK_DATA_ORDER took a pointer to the |HASH_CTX| and the assembly language implementations took a pointer to the hash state |h| member of |HASH_CTX|. (This worked because |h| is always the first member of |HASH_CTX|.) Now, the C implementations take a pointer directly to |h| too. The definitions of |MD4_CTX|, |MD5_CTX|, and |SHA1_CTX| were changed to be consistent with |SHA256_CTX| and |SHA512_CTX| in storing the hash state in an array. This will break source compatibility with any external code that accesses the hash state directly, but will not affect binary compatibility. The second parameter of |HASH_BLOCK_DATA_ORDER| is now of type |const uint8_t *|; previously it was |void *| and all implementations had a |uint8_t *data| variable to access it as an array of bytes. This change paves the way for future refactorings such as automatically generating the |*_Init| functions and/or sharing one I-U-F implementation across all digest algorithms. Change-Id: I6e9dd09ff057c67941021d324a4fa1d39f58b0db Reviewed-on: https://boringssl-review.googlesource.com/6405 Reviewed-by: Adam Langley <agl@google.com>
103 lines
4.2 KiB
C
103 lines
4.2 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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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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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#ifndef OPENSSL_HEADER_MD4_H
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#define OPENSSL_HEADER_MD4_H
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#include <openssl/base.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* MD4. */
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/* MD4_CBLOCK is the block size of MD4. */
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#define MD4_CBLOCK 64
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/* MD4_DIGEST_LENGTH is the length of an MD4 digest. */
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#define MD4_DIGEST_LENGTH 16
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/* MD4_Init initialises |md4| and returns one. */
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OPENSSL_EXPORT int MD4_Init(MD4_CTX *md4);
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/* MD4_Update adds |len| bytes from |data| to |md4| and returns one. */
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OPENSSL_EXPORT int MD4_Update(MD4_CTX *md4, const void *data, size_t len);
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/* MD4_Final adds the final padding to |md4| and writes the resulting digest to
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* |md|, which must have at least |MD4_DIGEST_LENGTH| bytes of space. It
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* returns one. */
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OPENSSL_EXPORT int MD4_Final(uint8_t *md, MD4_CTX *md4);
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/* MD4_Transform is a low-level function that performs a single, MD4 block
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* transformation using the state from |md4| and 64 bytes from |block|. */
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OPENSSL_EXPORT void MD4_Transform(MD4_CTX *md4, const uint8_t *block);
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struct md4_state_st {
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uint32_t h[4];
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uint32_t Nl, Nh;
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uint32_t data[16];
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unsigned int num;
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};
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#if defined(__cplusplus)
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} /* extern C */
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#endif
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#endif /* OPENSSL_HEADER_MD4_H */
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