.. _program_listing_file_include_rcutils_sha256.h:

Program Listing for File sha256.h
=================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_rcutils_sha256.h>` (``include/rcutils/sha256.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2023 Open Source Robotics Foundation, Inc.
   //
   // Licensed 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 RCUTILS__SHA256_H_
   #define RCUTILS__SHA256_H_
   
   #ifdef __cplusplus
   extern "C"
   {
   #endif
   
   #include <stddef.h>
   #include <stdint.h>
   
   #include "rcutils/visibility_control.h"
   
   #define RCUTILS_SHA256_BLOCK_SIZE 32
   
   typedef struct RCUTILS_PUBLIC_TYPE rcutils_sha256_ctx_s
   {
     uint8_t data[64];
     size_t datalen;
     uint64_t bitlen;
     uint32_t state[8];
   } rcutils_sha256_ctx_t;
   
   
   RCUTILS_PUBLIC
   void rcutils_sha256_init(rcutils_sha256_ctx_t * ctx);
   
   
   RCUTILS_PUBLIC
   void rcutils_sha256_update(rcutils_sha256_ctx_t * ctx, const uint8_t * data, size_t data_len);
   
   
   #ifdef DOXYGEN_ONLY
   // One of the tools used by rosdoc2 misunderstands uint8_t[] as a uint8_t,
   // so make it a pointer for documentation purposes.
   RCUTILS_PUBLIC
   void rcutils_sha256_final(
     rcutils_sha256_ctx_t * ctx,
     uint8_t * output_hash);
   #else
   RCUTILS_PUBLIC
   void rcutils_sha256_final(
     rcutils_sha256_ctx_t * ctx,
     uint8_t output_hash[RCUTILS_SHA256_BLOCK_SIZE]);
   #endif
   
   #ifdef __cplusplus
   }
   #endif
   
   #endif  // RCUTILS__SHA256_H_