nodejs aesは128アルゴリズムを解読して、base 64は符号化します.

function encryption(data) {
    var iv = "";
    var clearEncoding = 'utf8';
    var cipherEncoding = 'base64';
    var cipherChunks = [];
    var cipher = CRYPTO.createCipheriv('aes-128-ecb', key, iv);
    cipher.setAutoPadding(true);
    cipherChunks.push(cipher.update(data, clearEncoding, cipherEncoding));
    cipherChunks.push(cipher.final(cipherEncoding));
    return cipherChunks.join('');
}

function decryption(data,key){
    var iv = "";
    var clearEncoding = 'utf8';
    var cipherEncoding = 'base64';
    var cipherChunks = [];
    var decipher = crypto.createDecipheriv('aes-128-ecb', key, iv);
    decipher.setAutoPadding(true);
    cipherChunks.push(decipher.update(data, cipherEncoding, clearEncoding));
    cipherChunks.push(decipher.final(clearEncoding));
    console.log( cipherChunks.join(''))
}