| /* |
| * 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 SHA256_H |
| #define SHA256_H 1 |
| |
| #include <stdio.h> |
| #include <stdint.h> |
| |
| #ifdef __cplusplus |
| namespace rocketmqSignature { |
| #endif |
| |
| /* Structure to save state of computation between the single steps. */ |
| struct sha256_ctx { |
| uint32_t state[8]; |
| |
| uint32_t total[2]; |
| size_t buflen; |
| uint32_t buffer[32]; |
| }; |
| |
| enum { SHA224_DIGEST_SIZE = 28 }; |
| enum { SHA256_DIGEST_SIZE = 32 }; |
| |
| /* Initialize structure containing state of computation. */ |
| extern void sha256_init_ctx(struct sha256_ctx* ctx); |
| extern void sha224_init_ctx(struct sha256_ctx* ctx); |
| |
| /* Starting with the result of former calls of this function (or the |
| initialization function update the context for the next LEN bytes |
| starting at BUFFER. |
| It is necessary that LEN is a multiple of 64!!! */ |
| extern void sha256_process_block(const void* buffer, size_t len, struct sha256_ctx* ctx); |
| |
| /* Starting with the result of former calls of this function (or the |
| initialization function update the context for the next LEN bytes |
| starting at BUFFER. |
| It is NOT required that LEN is a multiple of 64. */ |
| extern void sha256_process_bytes(const void* buffer, size_t len, struct sha256_ctx* ctx); |
| |
| /* Process the remaining bytes in the buffer and put result from CTX |
| in first 32 (28) bytes following RESBUF. The result is always in little |
| endian byte order, so that a byte-wise output yields to the wanted |
| ASCII representation of the message digest. */ |
| extern void* sha256_finish_ctx(struct sha256_ctx* ctx, void* resbuf); |
| extern void* sha224_finish_ctx(struct sha256_ctx* ctx, void* resbuf); |
| |
| /* Put result from CTX in first 32 (28) bytes following RESBUF. The result is |
| always in little endian byte order, so that a byte-wise output yields |
| to the wanted ASCII representation of the message digest. */ |
| extern void* sha256_read_ctx(const struct sha256_ctx* ctx, void* resbuf); |
| extern void* sha224_read_ctx(const struct sha256_ctx* ctx, void* resbuf); |
| |
| /* Compute SHA256 (SHA224) message digest for bytes read from STREAM. The |
| resulting message digest number will be written into the 32 (28) bytes |
| beginning at RESBLOCK. */ |
| extern int sha256_stream(FILE* stream, void* resblock); |
| extern int sha224_stream(FILE* stream, void* resblock); |
| |
| /* Compute SHA256 (SHA224) message digest for LEN bytes beginning at BUFFER. The |
| result is always in little endian byte order, so that a byte-wise |
| output yields to the wanted ASCII representation of the message |
| digest. */ |
| extern void* sha256_buffer(const char* buffer, size_t len, void* resblock); |
| extern void* sha224_buffer(const char* buffer, size_t len, void* resblock); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |