Method DES_encrypt

src/Encryption.cpp:101–138

}

char* Encryption::DES_encrypt(const char * key, int keysize, const char * data, int size, bool addZero, int type) {
	char keybuf[KeySize];
	if (key == NULL) {
		memcpy(keybuf, _DefaultKey, KeySize);
		keysize = KeySize;
	} else {
		if (keysize == -1)
			keysize = strlen(key);	//zero terminator NOT included
		if (keysize > KeySize)
			keysize = KeySize;
		memcpy(keybuf, key, keysize);
		for(size_t i = keysize; i < KeySize; i++)
			keybuf[i] = 0;
	}

	if (size == -1)
		size = strlen(data);

	char * decrypted = new char[size+(addZero?1:0)];
	if (!decrypted)
		return NULL;

	if (addZero)
		decrypted[size] = 0;

	// Prepare the key for use with DES_cfb64_encrypt
	DES_cblock key2;
	DES_key_schedule schedule;
	memcpy(key2, keybuf, KeySize);
	DES_set_odd_parity(&key2);
	DES_set_key_checked(&key2, &schedule);

	// Decryption occurs here
	int n = 0;
	DES_cfb64_encrypt((unsigned char*) data, (unsigned char *)decrypted, size, &schedule, &key2, &n, type);

	return decrypted;
}