#include <stdio.h>
#include <string.h>
#include "base64.h"

void encryptDecrypt(char *input, size_t cl, const char *key, size_t kl, char* out) {
    for (int i = 0; i < cl; ++i) {
        out[i] = input[i] ^ key [i % kl];
	}
}

int main(int argc, char** argv) {
	const char* cipher_b64 = "Oz4rPj0+LDovPiwsKDAtOw==";
	size_t cl_64 = strlen(cipher_b64);
	size_t cl = 0;

	const char* key = "_";
	size_t kl = strlen(key);

	char* cipher = base64_decode(cipher_b64, cl_64, &cl);
	char* clear = malloc(cl);
	memset(clear, '\0', cl);

	encryptDecrypt(cipher, cl, key, kl, clear);
	fprintf(stderr, "cleartext: %s\n", clear);

	free(cipher);
	free(clear);

	return 0;
}