encdec.cpp

// Copyright (c) 2014-2023, Epic Cash and fireice-uk
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#include "encdec.h"

inline unsigned char hf_hex2bin(char c, bool& err)
{
	if(c >= '0' && c <= '9')
		return c - '0';
	else if(c >= 'a' && c <= 'f')
		return c - 'a' + 0xA;
	else if(c >= 'A' && c <= 'F')
		return c - 'A' + 0xA;

	err = true;
	return 0;
}

bool hex2bin(const char* in, unsigned int len, unsigned char* out)
{
	bool error = false;
	for(unsigned int i = 0; i < len; i += 2)
	{
		out[i / 2] = (hf_hex2bin(in[i], error) << 4) | hf_hex2bin(in[i + 1], error);
		if(error)
			return false;
	}
	return true;
}

inline char hf_bin2hex(unsigned char c)
{
	if(c <= 0x9)
		return '0' + c;
	else
		return 'a' - 0xA + c;
}

void bin2hex(const unsigned char* in, unsigned int len, char* out)
{
	for(unsigned int i = 0; i < len; i++)
	{
		out[i * 2] = hf_bin2hex((in[i] & 0xF0) >> 4);
		out[i * 2 + 1] = hf_bin2hex(in[i] & 0x0F);
	}
	out[len*2] = '\0';
}