Line data    Source code

       1             : /**
       2             :  * The MIT License (MIT)
       3             :  *
       4             :  * Copyright (c) 2021 RSK Labs Ltd
       5             :  *
       6             :  * Permission is hereby granted, free of charge, to any person obtaining a copy
       7             :  * of this software and associated documentation files (the "Software"), to
       8             :  * deal in the Software without restriction, including without limitation the
       9             :  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
      10             :  * sell copies of the Software, and to permit persons to whom the Software is
      11             :  * furnished to do so, subject to the following conditions:
      12             :  *
      13             :  * The above copyright notice and this permission notice shall be included in
      14             :  * all copies or substantial portions of the Software.
      15             :  *
      16             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      17             :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      18             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      19             :  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      20             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      21             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
      22             :  * IN THE SOFTWARE.
      23             :  */
      24             : 
      25             : /**
      26             :  * Taken from https://github.com/someone42/hardware-bitcoin-wallet @
      27             :  * 102c300d994712484c3c028b215f90a6f99d6155 and adapted for use with
      28             :  * the powHSM HAL by RootstockLabs. LICENSE transcribed below.
      29             :  */
      30             : 
      31             : /*
      32             :   Copyright (c) 2011-2012 someone42
      33             :   All rights reserved.
      34             : 
      35             :   Redistribution and use in source and binary forms, with or without
      36             :   modification, are permitted provided that the following conditions are met:
      37             : 
      38             :       Redistributions of source code must retain the above copyright notice,
      39             :       this list of conditions and the following disclaimer.
      40             : 
      41             :       Redistributions in binary form must reproduce the above copyright notice,
      42             :       this list of conditions and the following disclaimer in the documentation
      43             :       and/or other materials provided with the distribution.
      44             : 
      45             :   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
      46             :   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      47             :   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      48             :   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
      49             :   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
      50             :   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
      51             :   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
      52             :   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
      53             :   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
      54             :   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
      55             :   POSSIBILITY OF SUCH DAMAGE.
      56             : */
      57             : 
      58             : /** \file endian.c
      59             :  *
      60             :  * \brief Contains functions which perform endian-specific type conversion.
      61             :  *
      62             :  * This file is licensed as described by the file LICENCE.
      63             :  */
      64             : 
      65             : #include "endian.h"
      66             : 
      67             : /** Write 32 bit unsigned integer into a byte array in big-endian format.
      68             :  * \param out The destination byte array. This must have space for at
      69             :  *            least 4 bytes.
      70             :  * \param in The source integer.
      71             :  */
      72          64 : void write_uint32_be(uint8_t *out, uint32_t in) {
      73          64 :     out[0] = (uint8_t)(in >> 24);
      74          64 :     out[1] = (uint8_t)(in >> 16);
      75          64 :     out[2] = (uint8_t)(in >> 8);
      76          64 :     out[3] = (uint8_t)in;
      77          64 : }