XorCryptor.cpp

/**
 *   Copyright (c) 2018 TectroLabs L.L.C.
 *
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/**
 *    @file XorCryptor.cpp
 *    @author Andrian Belinski
 *    @date 06/1/2018
 *    @version 1.0
 *
 *    @brief encrypts an array of bytes using XOR with a key
 *
 */

#include "XorCryptor.h"

namespace entropyservice {

/**
 * Crypt requested bytes
 * @param bytes painter to byte array to crypt
 * @param byteCount how many bytes to crypt
 * @param cryptoKey pinter to the crypto key
 * @keySize cryptoKeySize key size
 *
 */
bool XorCryptor::crypt(unsigned char *bytes, int byteCount, unsigned char *cryptoKey, int cryptoKeySize) {
	if (bytes == NULL || byteCount <= 1 || cryptoKey == NULL || cryptoKeySize < 1) {
		return false;
	}
	int keyIndex = 0;
	for(int i = 0; i < byteCount; i++) {
		bytes[i] ^= cryptoKey[keyIndex++];
		if (keyIndex >= cryptoKeySize) {
			keyIndex = 0;
		}
	}
	return true;
}

XorCryptor::XorCryptor() {
}

XorCryptor::~XorCryptor() {
}

} /* namespace entropyservice */