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///////////////////////////////////////////////////////////////////////////////
//
/// \file check.h
/// \brief Prototypes for different check functions
//
// This code has been put into the public domain.
//
// This 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.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef LZMA_CHECK_H
#define LZMA_CHECK_H
#include "common.h"
typedef struct {
/// Internal state
uint32_t state[8];
/// Temporary 8-byte aligned buffer to hold incomplete chunk.
/// After lzma_check_finish(), the first 32 bytes will contain
/// the final digest in big endian byte order.
uint8_t buffer[64];
/// Size of the message excluding padding
uint64_t size;
} lzma_sha256;
/// \note This is not in the public API because this structure will
/// change in future.
typedef union {
uint32_t crc32;
uint64_t crc64;
lzma_sha256 sha256;
} lzma_check;
#ifdef HAVE_SMALL
extern uint32_t lzma_crc32_table[8][256];
extern uint64_t lzma_crc64_table[4][256];
#else
extern const uint32_t lzma_crc32_table[8][256];
extern const uint64_t lzma_crc64_table[4][256];
#endif
// Generic
/// \brief Initializes *check depending on type
///
/// \return LZMA_OK on success. LZMA_UNSUPPORTED_CHECK if the type is not
/// supported by the current version or build of liblzma.
/// LZMA_PROG_ERROR if type > LZMA_CHECK_ID_MAX.
///
extern lzma_ret lzma_check_init(lzma_check *check, lzma_check_type type);
/// \brief Updates *check
///
extern void lzma_check_update(lzma_check *check, lzma_check_type type,
const uint8_t *buf, size_t size);
/// \brief Finishes *check
///
extern void lzma_check_finish(lzma_check *check, lzma_check_type type);
/*
/// \brief Compare two checks
///
/// \return false if the checks are identical; true if they differ.
///
extern bool lzma_check_compare(
lzma_check *check1, lzma_check *check2, lzma_check_type type);
*/
// CRC32
extern void lzma_crc32_init(void);
// CRC64
extern void lzma_crc64_init(void);
// SHA256
extern void lzma_sha256_init(lzma_sha256 *sha256);
extern void lzma_sha256_update(
const uint8_t *buf, size_t size, lzma_sha256 *sha256);
extern void lzma_sha256_finish(lzma_sha256 *sha256);
#endif
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