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- /* Declaration of functions and data types used for SHA256 sum computing
- library functions.
- Copyright (C) 2007 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #ifndef _SHA256_H
- #define _SHA256_H 1
- #include <limits.h>
- #include <stdint.h>
- #include <stdio.h>
- /* Structure to save state of computation between the single steps. */
- struct sha256_ctx
- {
- uint32_t H[8];
- uint32_t total[2];
- uint32_t buflen;
- char buffer[128] __attribute__ ((__aligned__ (__alignof__ (uint32_t))));
- };
- /* Initialize structure containing state of computation.
- (FIPS 180-2: 5.3.2) */
- extern void __sha256_init_ctx (struct sha256_ctx *ctx) attribute_hidden;
- /* Starting with the result of former calls of this function (or the
- initialization function update the context for the next LEN bytes
- starting at BUFFER.
- It is NOT required that LEN is a multiple of 64. */
- extern void __sha256_process_bytes (const void *buffer, size_t len,
- struct sha256_ctx *ctx) attribute_hidden;
- /* Process the remaining bytes in the buffer and put result from CTX
- in first 32 bytes following RESBUF.
- IMPORTANT: On some systems it is required that RESBUF is correctly
- aligned for a 32 bits value. */
- extern void *__sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf)
- attribute_hidden;
- #endif /* sha256.h */
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