| /////////////////////////////////////////////////////////////////////////////// |
| // |
| /// \file check.c |
| /// \brief Check sizes |
| // |
| // 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. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "check.h" |
| |
| // See the .lzma header format specification section 2.2.2. |
| LZMA_API const uint32_t lzma_check_sizes[8] = { 0, 4, 4, 8, 16, 32, 32, 64 }; |
| |
| |
| LZMA_API const lzma_bool lzma_available_checks[LZMA_CHECK_ID_MAX + 1] = { |
| true, // LZMA_CHECK_NONE |
| |
| #ifdef HAVE_CHECK_CRC32 |
| true, |
| #else |
| false, |
| #endif |
| |
| false, // Reserved |
| |
| #ifdef HAVE_CHECK_CRC64 |
| true, |
| #else |
| false, |
| #endif |
| |
| false, // Reserved |
| |
| #ifdef HAVE_CHECK_SHA256 |
| true, |
| #else |
| false, |
| #endif |
| |
| false, // Reserved |
| false, // Reserved |
| }; |
| |
| |
| extern lzma_ret |
| lzma_check_init(lzma_check *check, lzma_check_type type) |
| { |
| lzma_ret ret = LZMA_OK; |
| |
| switch (type) { |
| case LZMA_CHECK_NONE: |
| break; |
| |
| #ifdef HAVE_CHECK_CRC32 |
| case LZMA_CHECK_CRC32: |
| check->crc32 = 0; |
| break; |
| #endif |
| |
| #ifdef HAVE_CHECK_CRC64 |
| case LZMA_CHECK_CRC64: |
| check->crc64 = 0; |
| break; |
| #endif |
| |
| #ifdef HAVE_CHECK_SHA256 |
| case LZMA_CHECK_SHA256: |
| lzma_sha256_init(&check->sha256); |
| break; |
| #endif |
| |
| default: |
| if (type <= LZMA_CHECK_ID_MAX) |
| ret = LZMA_UNSUPPORTED_CHECK; |
| else |
| ret = LZMA_PROG_ERROR; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| |
| extern void |
| lzma_check_update(lzma_check *check, lzma_check_type type, |
| const uint8_t *buf, size_t size) |
| { |
| switch (type) { |
| #ifdef HAVE_CHECK_CRC32 |
| case LZMA_CHECK_CRC32: |
| check->crc32 = lzma_crc32(buf, size, check->crc32); |
| break; |
| #endif |
| |
| #ifdef HAVE_CHECK_CRC64 |
| case LZMA_CHECK_CRC64: |
| check->crc64 = lzma_crc64(buf, size, check->crc64); |
| break; |
| #endif |
| |
| #ifdef HAVE_CHECK_SHA256 |
| case LZMA_CHECK_SHA256: |
| lzma_sha256_update(buf, size, &check->sha256); |
| break; |
| #endif |
| |
| default: |
| break; |
| } |
| |
| return; |
| } |
| |
| |
| extern void |
| lzma_check_finish(lzma_check *check, lzma_check_type type) |
| { |
| #ifdef HAVE_CHECK_SHA256 |
| if (type == LZMA_CHECK_SHA256) |
| lzma_sha256_finish(&check->sha256); |
| #endif |
| |
| return; |
| } |
| |
| |
| /* |
| extern bool |
| lzma_check_compare( |
| lzma_check *check1, lzma_check *check2, lzma_check_type type) |
| { |
| bool ret; |
| |
| switch (type) { |
| case LZMA_CHECK_NONE: |
| break; |
| |
| case LZMA_CHECK_CRC32: |
| ret = check1->crc32 != check2->crc32; |
| break; |
| |
| case LZMA_CHECK_CRC64: |
| ret = check1->crc64 != check2->crc64; |
| break; |
| |
| default: |
| // Unsupported check |
| assert(type <= 7); |
| ret = false; |
| break; |
| } |
| |
| return ret; |
| } |
| */ |