/////////////////////////////////////////////////////////////////////////////// // /// \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; }