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///////////////////////////////////////////////////////////////////////////////
//
/// \file check.c
/// \brief Single API to access different integrity checks
//
// Author: Lasse Collin
//
// This file has been put into the public domain.
// You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////
#include "check.h"
extern LZMA_API(lzma_bool)
lzma_check_is_supported(lzma_check type)
{
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
};
if ((unsigned int)(type) > LZMA_CHECK_ID_MAX)
return false;
return available_checks[(unsigned int)(type)];
}
extern LZMA_API(uint32_t)
lzma_check_size(lzma_check type)
{
// 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
};
if ((unsigned int)(type) > LZMA_CHECK_ID_MAX)
return UINT32_MAX;
return check_sizes[(unsigned int)(type)];
}
extern void
lzma_check_init(lzma_check_state *check, lzma_check type)
{
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;
}
extern void
lzma_check_update(lzma_check_state *check, lzma_check type,
const uint8_t *buf, size_t size)
{
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;
}
extern void
lzma_check_finish(lzma_check_state *check, lzma_check type)
{
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;
}
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