check.c File Reference

Single API to access different integrity checks. More...

#include "check.h"

Go to the source code of this file.

Functions
	LZMA_API (lzma_bool)
	LZMA_API (uint32_t)
void	lzma_check_init (lzma_check_state *check, lzma_check type)
	Initialize *check depending on type. More...
void	lzma_check_update (lzma_check_state *check, lzma_check type, const uint8_t *buf, size_t size)
	Update the check state. More...
void	lzma_check_finish (lzma_check_state *check, lzma_check type)
	Finish the check calculation and store the result to check->buffer.u8. More...

Detailed Description

Single API to access different integrity checks.

Definition in file check.c.

Function Documentation

LZMA_API() [1/2]

LZMA_API

(

lzma_bool

)

Definition at line 16 of file check.c.

{
    if ((unsigned int)(type) > LZMA_CHECK_ID_MAX)
        return false;
 
    static const lzma_bool available_checks[LZMA_CHECK_ID_MAX + 1] = {
        true,   // LZMA_CHECK_NONE
 
#ifdef HAVE_CHECK_CRC32
        true,
#else
        false,
#endif
 
        false,  // Reserved
        false,  // Reserved
 
#ifdef HAVE_CHECK_CRC64
        true,
#else
        false,
#endif
 
        false,  // Reserved
        false,  // Reserved
        false,  // Reserved
        false,  // Reserved
        false,  // Reserved
 
#ifdef HAVE_CHECK_SHA256
        true,
#else
        false,
#endif
 
        false,  // Reserved
        false,  // Reserved
        false,  // Reserved
        false,  // Reserved
        false,  // Reserved
    };
 
    return available_checks[(unsigned int)(type)];
}

References int, LZMA_CHECK_ID_MAX, and type.

LZMA_API() [2/2]

LZMA_API

(

uint32_t

)

Definition at line 63 of file check.c.

{
    if ((unsigned int)(type) > LZMA_CHECK_ID_MAX)
        return UINT32_MAX;
 
    // See file-format.txt section 2.1.1.2.
    static const uint8_t check_sizes[LZMA_CHECK_ID_MAX + 1] = {
        0,
        4, 4, 4,
        8, 8, 8,
        16, 16, 16,
        32, 32, 32,
        64, 64, 64
    };
 
    return check_sizes[(unsigned int)(type)];
}

References int, LZMA_CHECK_ID_MAX, type, and UINT32_MAX.

lzma_check_finish()

void lzma_check_finish	(	lzma_check_state *	check,
		lzma_check	type
	)

Finish the check calculation and store the result to check->buffer.u8.

Definition at line 148 of file check.c.

{
    switch (type) {
#ifdef HAVE_CHECK_CRC32
    case LZMA_CHECK_CRC32:
        check->buffer.u32[0] = conv32le(check->state.crc32);
        break;
#endif
 
#ifdef HAVE_CHECK_CRC64
    case LZMA_CHECK_CRC64:
        check->buffer.u64[0] = conv64le(check->state.crc64);
        break;
#endif
 
#ifdef HAVE_CHECK_SHA256
    case LZMA_CHECK_SHA256:
        lzma_sha256_finish(check);
        break;
#endif
 
    default:
        break;
    }
 
    return;
}

References check, conv32le, conv64le, LZMA_CHECK_CRC32, LZMA_CHECK_CRC64, LZMA_CHECK_SHA256, lzma_sha256_finish(), and type.

Referenced by block_buffer_encode(), block_decode(), and block_encode().

lzma_check_init()

void lzma_check_init	(	lzma_check_state *	check,
		lzma_check	type
	)

Initialize *check depending on type.

Returns

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.

Definition at line 84 of file check.c.

{
    switch (type) {
    case LZMA_CHECK_NONE:
        break;
 
#ifdef HAVE_CHECK_CRC32
    case LZMA_CHECK_CRC32:
        check->state.crc32 = 0;
        break;
#endif
 
#ifdef HAVE_CHECK_CRC64
    case LZMA_CHECK_CRC64:
        check->state.crc64 = 0;
        break;
#endif
 
#ifdef HAVE_CHECK_SHA256
    case LZMA_CHECK_SHA256:
        lzma_sha256_init(check);
        break;
#endif
 
    default:
        break;
    }
 
    return;
}

References check, LZMA_CHECK_CRC32, LZMA_CHECK_CRC64, LZMA_CHECK_NONE, LZMA_CHECK_SHA256, lzma_sha256_init(), and type.

Referenced by block_buffer_encode(), LZMA_API(), lzma_block_decoder_init(), and lzma_block_encoder_init().

lzma_check_update()

void lzma_check_update	(	lzma_check_state *	check,
		lzma_check	type,
		const uint8_t *	buf,
		size_t	size
	)

Update the check state.

Definition at line 117 of file check.c.

{
    switch (type) {
#ifdef HAVE_CHECK_CRC32
    case LZMA_CHECK_CRC32:
        check->state.crc32 = lzma_crc32(buf, size, check->state.crc32);
        break;
#endif
 
#ifdef HAVE_CHECK_CRC64
    case LZMA_CHECK_CRC64:
        check->state.crc64 = lzma_crc64(buf, size, check->state.crc64);
        break;
#endif
 
#ifdef HAVE_CHECK_SHA256
    case LZMA_CHECK_SHA256:
        lzma_sha256_update(buf, size, check);
        break;
#endif
 
    default:
        break;
    }
 
    return;
}

References check, LZMA_CHECK_CRC32, LZMA_CHECK_CRC64, LZMA_CHECK_SHA256, lzma_sha256_update(), and type.

Referenced by block_buffer_encode(), block_decode(), block_encode(), and hash_append().