function SHA256Encrypt(password, salt, iteration) {
    var saltedpassword = salt + password;
    var sha256 = CryptoJS.algo.SHA256.create();
    for(var i = 0; i < iteration; i++) {
            alert("saltedpassword = " + saltedpassword);
            sha256.update(saltedpassword);
            var saltedpassword = sha256.finalize();
            sha256.reset();
    }
    return saltedpassword.toString(CryptoJS.enc.Base64);
}

var encryptedPassword = SHA256Encrypt("123456789", "ASIN", 3)

saltedpassword = ASIN123456789
saltedpassword = 3362d80b757d14bfe18c01f6a003ed38a3a4a3dcab0417efb457b71740e21411
saltedpassword = 6020c992a9b7cd3ca9e95b9a3e21b64911edb7983b3dd77bdcecda19f2756987

function SHA256Encrypt(password, salt, iteration) {
    var saltedpassword = salt + password;
    for(var i = 0; i < iteration-1; i++) {
            console.log("saltedpassword = "+saltedpassword)
            var sha256 = crypto.createHash('sha256');
            sha256.update(saltedpassword);
            var saltedpassword = sha256.digest('hex');
    }
    console.log("saltedpassword = "+saltedpassword)
    var sha256 = crypto.createHash('sha256');
    sha256.update(saltedpassword);
    return sha256.digest('base64');
}

var encryptedPassword = SHA256Encrypt("123456789", "ASIN", 3);

saltedpassword = ASIN123456789
saltedpassword = 3362d80b757d14bfe18c01f6a003ed38a3a4a3dcab0417efb457b71740e21411
saltedpassword = 4795d40ae8ae797f0ce51dfe4b496bca68f6d1f4a264f4ca52348ddd65a2988d

var hashedpw = crypto.pbkdf2Sync(password, salt, iterations, keysize);

var hashedpw = CryptoJS.PBKDF2(
    password,
    salt,
    { keySize: keysize/32, iterations: iterations }
);

function SHA256Encrypt(password, salt, iteration) {
    var saltedpassword = salt + password;
    for(var i = 0; i < iteration-1; i++) {
        alert("saltedpassword = " + saltedpassword);
        saltedpassword = CryptoJS.SHA256( saltedpassword ).toString( CryptoJS.enc.Hex );
    }
    saltedpassword = CryptoJS.SHA256( saltedpassword );
    return saltedpassword.toString(CryptoJS.enc.Base64);
}