AuroraRuntime/Source/Parse/Base32.cpp

/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: Base32.cpp
    Date: 2021-6-12
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "Base32.hpp"
#include <tomcrypt.h>

namespace Aurora::Parse
{
    AUKN_SYM bool Base32Decode(const AuString &in, AuByteBuffer &decoded)
    {
        unsigned long length = in.size();
    
        auto writeView = decoded.GetOrAllocateLinearWriteable(length);
        if (!writeView)
        {
            SysPushErrorMem();
            return {};
        }

        auto status = ::base32_decode(AuReinterpretCast<const char *>(decoded.writePtr),
                                      (unsigned long)length,
                                      AuReinterpretCast<unsigned char *>(&decoded[0]), 
                                      &length, BASE32_RFC4648);
        decoded.writePtr += length;
        return status == CRYPT_OK;
    }

    AUKN_SYM bool Base32Encode(const void *buffer, AuMach length, AuString &encoded)
    {
        unsigned long outLength = ((length * 8 + 4) / 5) + 5;
     
        if (!AuTryResize(encoded, outLength))
        {
            SysPushErrorMem();
            return false;
        }

        auto status = ::base32_encode(AuReinterpretCast<const unsigned char *>(buffer),
                                      (unsigned long)length, 
                                      &encoded[0],
                                      &outLength,
                                      BASE32_RFC4648);
        if (!AuTryResize(encoded, length))
        {
            SysPushErrorMem();
            return false;
        }
            
        return status == CRYPT_OK;
    }
}