mirror of
https://git.tukaani.org/xz.git
synced 2025-10-28 12:02:55 +00:00
3b34851de1
broken. API has changed a lot and it will still change a little more here and there. The command line tool doesn't have all the required changes to reflect the API changes, so it's easy to get "internal error" or trigger assertions.
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
/// \file check.h
|
|
/// \brief Internal API to different integrity 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"
|
|
|
|
|
|
// Index hashing needs the best possible hash function (preferably
|
|
// a cryptographic hash) for maximum reliability.
|
|
#if defined(HAVE_CHECK_SHA256)
|
|
# define LZMA_CHECK_BEST LZMA_CHECK_SHA256
|
|
#elif defined(HAVE_CHECK_CRC64)
|
|
# define LZMA_CHECK_BEST LZMA_CHECK_CRC64
|
|
#else
|
|
# define LZMA_CHECK_BEST LZMA_CHECK_CRC32
|
|
#endif
|
|
|
|
|
|
/// \brief Structure to hold internal state of the check being calculated
|
|
///
|
|
/// \note This is not in the public API because this structure may
|
|
/// change in future if new integrity check algorithms are added.
|
|
typedef struct {
|
|
/// Buffer to hold the final result and a temporary buffer for SHA256.
|
|
union {
|
|
uint8_t u8[64];
|
|
uint32_t u32[16];
|
|
uint64_t u64[8];
|
|
} buffer;
|
|
|
|
/// Check-specific data
|
|
union {
|
|
uint32_t crc32;
|
|
uint64_t crc64;
|
|
|
|
struct {
|
|
/// Internal state
|
|
uint32_t state[8];
|
|
|
|
/// Size of the message excluding padding
|
|
uint64_t size;
|
|
} sha256;
|
|
} state;
|
|
|
|
} lzma_check_state;
|
|
|
|
|
|
#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
|
|
|
|
|
|
/// \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 void lzma_check_init(lzma_check_state *check, lzma_check type);
|
|
|
|
|
|
/// \brief Updates *check
|
|
///
|
|
extern void lzma_check_update(lzma_check_state *check, lzma_check type,
|
|
const uint8_t *buf, size_t size);
|
|
|
|
|
|
/// \brief Finishes *check
|
|
///
|
|
extern void lzma_check_finish(lzma_check_state *check, lzma_check type);
|
|
|
|
|
|
extern void lzma_crc32_init(void);
|
|
|
|
|
|
extern void lzma_crc64_init(void);
|
|
|
|
|
|
extern void lzma_sha256_init(lzma_check_state *check);
|
|
|
|
extern void lzma_sha256_update(
|
|
const uint8_t *buf, size_t size, lzma_check_state *check);
|
|
|
|
extern void lzma_sha256_finish(lzma_check_state *check);
|
|
|
|
#endif
|