| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #ifndef BULK_CRC32_H_INCLUDED |
| #define BULK_CRC32_H_INCLUDED |
| |
| #include <stdint.h> |
| |
| // Constants for different CRC algorithms |
| #define CRC32C_POLYNOMIAL 1 |
| #define CRC32_ZLIB_POLYNOMIAL 2 |
| |
| // Return codes for bulk_verify_crc |
| #define CHECKSUMS_VALID 0 |
| #define INVALID_CHECKSUM_DETECTED -1 |
| #define INVALID_CHECKSUM_TYPE -2 |
| |
| // Return type for bulk verification when verification fails |
| typedef struct crc32_error { |
| uint32_t got_crc; |
| uint32_t expected_crc; |
| const uint8_t *bad_data; // pointer to start of data chunk with error |
| } crc32_error_t; |
| |
| |
| /** |
| * Verify a buffer of data which is checksummed in chunks |
| * of bytes_per_checksum bytes. The checksums are each 32 bits |
| * and are stored in sequential indexes of the 'sums' array. |
| * |
| * checksum_type - one of the CRC32 constants defined above |
| * error_info - if non-NULL, will be filled in if an error |
| * is detected |
| * |
| * Returns: 0 for success, non-zero for an error, result codes |
| * for which are defined above |
| */ |
| extern int bulk_verify_crc(const uint8_t *data, size_t data_len, |
| const uint32_t *sums, int checksum_type, |
| int bytes_per_checksum, |
| crc32_error_t *error_info); |
| |
| #endif |
