00461cf201
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 tool 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: I30513bb40b5f1d2c8932551d54073c35484b3f8b Reviewed-on: https://boringssl-review.googlesource.com/6401 Reviewed-by: Adam Langley <agl@google.com>
242 lines
9.3 KiB
C
242 lines
9.3 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_SHA_H
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#define OPENSSL_HEADER_SHA_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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/* The SHA family of hash functions (SHA-1 and SHA-2). */
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/* SHA_CBLOCK is the block size of SHA-1. */
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#define SHA_CBLOCK 64
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/* SHA_DIGEST_LENGTH is the length of a SHA-1 digest. */
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#define SHA_DIGEST_LENGTH 20
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/* TODO(fork): remove */
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#define SHA_LBLOCK 16
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#define SHA_LONG uint32_t
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/* SHA1_Init initialises |sha| and returns one. */
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OPENSSL_EXPORT int SHA1_Init(SHA_CTX *sha);
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/* SHA1_Update adds |len| bytes from |data| to |sha| and returns one. */
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OPENSSL_EXPORT int SHA1_Update(SHA_CTX *sha, const void *data, size_t len);
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/* SHA1_Final adds the final padding to |sha| and writes the resulting digest
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* to |md|, which must have at least |SHA_DIGEST_LENGTH| bytes of space. It
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* returns one. */
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OPENSSL_EXPORT int SHA1_Final(uint8_t *md, SHA_CTX *sha);
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/* SHA1 writes the digest of |len| bytes from |data| to |out| and returns
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* |out|. There must be at least |SHA_DIGEST_LENGTH| bytes of space in
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* |out|. */
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OPENSSL_EXPORT uint8_t *SHA1(const uint8_t *data, size_t len, uint8_t *out);
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/* SHA1_Transform is a low-level function that performs a single, SHA-1 block
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* transformation using the state from |sha| and 64 bytes from |block|. */
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OPENSSL_EXPORT void SHA1_Transform(SHA_CTX *sha, const uint8_t *block);
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struct sha_state_st {
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uint32_t h[5];
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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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/* SHA-224. */
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/* SHA224_CBLOCK is the block size of SHA-224. */
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#define SHA224_CBLOCK 64
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/* SHA224_DIGEST_LENGTH is the length of a SHA-224 digest. */
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#define SHA224_DIGEST_LENGTH 28
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/* SHA224_Init initialises |sha| and returns 1. */
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OPENSSL_EXPORT int SHA224_Init(SHA256_CTX *sha);
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/* SHA224_Update adds |len| bytes from |data| to |sha| and returns 1. */
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OPENSSL_EXPORT int SHA224_Update(SHA256_CTX *sha, const void *data, size_t len);
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/* SHA224_Final adds the final padding to |sha| and writes the resulting digest
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* to |md|, which must have at least |SHA224_DIGEST_LENGTH| bytes of space. It
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* returns one on success and zero on programmer error. */
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OPENSSL_EXPORT int SHA224_Final(uint8_t *md, SHA256_CTX *sha);
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/* SHA224 writes the digest of |len| bytes from |data| to |out| and returns
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* |out|. There must be at least |SHA224_DIGEST_LENGTH| bytes of space in
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* |out|. */
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OPENSSL_EXPORT uint8_t *SHA224(const uint8_t *data, size_t len, uint8_t *out);
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/* SHA-256. */
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/* SHA256_CBLOCK is the block size of SHA-256. */
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#define SHA256_CBLOCK 64
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/* SHA256_DIGEST_LENGTH is the length of a SHA-256 digest. */
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#define SHA256_DIGEST_LENGTH 32
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/* SHA256_Init initialises |sha| and returns 1. */
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OPENSSL_EXPORT int SHA256_Init(SHA256_CTX *sha);
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/* SHA256_Update adds |len| bytes from |data| to |sha| and returns 1. */
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OPENSSL_EXPORT int SHA256_Update(SHA256_CTX *sha, const void *data, size_t len);
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/* SHA256_Final adds the final padding to |sha| and writes the resulting digest
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* to |md|, which must have at least |SHA256_DIGEST_LENGTH| bytes of space. It
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* returns one on success and zero on programmer error. */
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OPENSSL_EXPORT int SHA256_Final(uint8_t *md, SHA256_CTX *sha);
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/* SHA256 writes the digest of |len| bytes from |data| to |out| and returns
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* |out|. There must be at least |SHA256_DIGEST_LENGTH| bytes of space in
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* |out|. */
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OPENSSL_EXPORT uint8_t *SHA256(const uint8_t *data, size_t len, uint8_t *out);
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/* SHA256_Transform is a low-level function that performs a single, SHA-1 block
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* transformation using the state from |sha| and 64 bytes from |block|. */
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OPENSSL_EXPORT void SHA256_Transform(SHA256_CTX *sha, const uint8_t *data);
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struct sha256_state_st {
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uint32_t h[8];
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uint32_t Nl, Nh;
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uint32_t data[16];
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unsigned int num, md_len;
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};
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/* SHA-384. */
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/* SHA384_CBLOCK is the block size of SHA-384. */
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#define SHA384_CBLOCK 128
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/* SHA384_DIGEST_LENGTH is the length of a SHA-384 digest. */
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#define SHA384_DIGEST_LENGTH 48
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/* SHA384_Init initialises |sha| and returns 1. */
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OPENSSL_EXPORT int SHA384_Init(SHA512_CTX *sha);
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/* SHA384_Update adds |len| bytes from |data| to |sha| and returns 1. */
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OPENSSL_EXPORT int SHA384_Update(SHA512_CTX *sha, const void *data, size_t len);
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/* SHA384_Final adds the final padding to |sha| and writes the resulting digest
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* to |md|, which must have at least |SHA384_DIGEST_LENGTH| bytes of space. It
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* returns one on success and zero on programmer error. */
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OPENSSL_EXPORT int SHA384_Final(uint8_t *md, SHA512_CTX *sha);
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/* SHA384 writes the digest of |len| bytes from |data| to |out| and returns
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* |out|. There must be at least |SHA384_DIGEST_LENGTH| bytes of space in
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* |out|. */
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OPENSSL_EXPORT uint8_t *SHA384(const uint8_t *data, size_t len, uint8_t *out);
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/* SHA384_Transform is a low-level function that performs a single, SHA-1 block
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* transformation using the state from |sha| and 64 bytes from |block|. */
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OPENSSL_EXPORT void SHA384_Transform(SHA512_CTX *sha, const uint8_t *data);
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/* SHA-512. */
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/* SHA512_CBLOCK is the block size of SHA-512. */
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#define SHA512_CBLOCK 128
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/* SHA512_DIGEST_LENGTH is the length of a SHA-512 digest. */
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#define SHA512_DIGEST_LENGTH 64
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/* SHA512_Init initialises |sha| and returns 1. */
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OPENSSL_EXPORT int SHA512_Init(SHA512_CTX *sha);
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/* SHA512_Update adds |len| bytes from |data| to |sha| and returns 1. */
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OPENSSL_EXPORT int SHA512_Update(SHA512_CTX *sha, const void *data, size_t len);
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/* SHA512_Final adds the final padding to |sha| and writes the resulting digest
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* to |md|, which must have at least |SHA512_DIGEST_LENGTH| bytes of space. It
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* returns one on success and zero on programmer error. */
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OPENSSL_EXPORT int SHA512_Final(uint8_t *md, SHA512_CTX *sha);
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/* SHA512 writes the digest of |len| bytes from |data| to |out| and returns
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* |out|. There must be at least |SHA512_DIGEST_LENGTH| bytes of space in
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* |out|. */
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OPENSSL_EXPORT uint8_t *SHA512(const uint8_t *data, size_t len, uint8_t *out);
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/* SHA512_Transform is a low-level function that performs a single, SHA-1 block
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* transformation using the state from |sha| and 64 bytes from |block|. */
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OPENSSL_EXPORT void SHA512_Transform(SHA512_CTX *sha, const uint8_t *data);
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struct sha512_state_st {
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uint64_t h[8];
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uint64_t Nl, Nh;
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union {
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uint64_t d[16];
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uint8_t p[128];
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} u;
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unsigned int num, md_len;
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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_SHA_H */
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