Online Base64 Encoder

Method getBytes() works as expected under Windows (Java9) and does nor works under Linux. Characterset() => UTF-8 on both systems. JVM Version => Java 9 (I tested open jvm and oracle jvm under Linux)
Code:

public static String createSign(String uri, String apiSecret) throws UnsupportedEncodingException{    byte[] signBytes = calculateSignBytes(uri, apiSecret);    return bytesToHexString(signBytes);}private static byte[] calculateSignBytes(String uri, String secret) throws UnsupportedEncodingException {    try {        Mac mac = Mac.getInstance(ALGORITHM);        SecretKeySpec secretKeySpec = new SecretKeySpec(secret.getBytes(), ALGORITHM);        mac.init(secretKeySpec);        return mac.doFinal(uri.getBytes());    } catch (NoSuchAlgorithmException | InvalidKeyException e) {        throw new RuntimeException(e);    }}private static String bytesToHexString(byte[] bytes){    StringBuilder stringBuilder = new StringBuilder();    for (byte b : bytes) {        stringBuilder.append(String.format("%02x", b));    }    return stringBuilder.toString();}

the same under Windows and Linux. I also tested compiling and export executable JAR under windows and rut it on Linux, all functionality works fine except code above.

I need an efficient (read native) way to convert an ArrayBuffer to a base64 string which needs to be used on a multipart post.

I have following Python code to encrypt (RSA) input value using PyCrypto. Now I need to encode the encrypted value in Base64. I tried the following and I gives me following error:

a bytes-like object is required, not 'tuple'

How to get the encoding done correctly for Base64?

from Crypto.PublicKey import RSAkey = RSA.generate(4096)f = open('C:/Test/my_rsa_public.pem', 'wb')f.write(key.publickey().exportKey('PEM'))f.close()f = open('C:/Test/my_rsa_private.pem', 'wb')f.write(key.exportKey('PEM'))f.close()f = open('C:/Test/my_rsa_public.pem', 'rb')f1 = open('C:/Test/my_rsa_private.pem', 'rb')key = RSA.importKey(f.read())key1 = RSA.importKey(f1.read())x = key.encrypt(b"MyTest",32)print(x)z = key1.decrypt(x)print(z)from base64 import b64encode, b64decodemret = b64encode(x)

this is the encoded string

YjRmYTJhMGEtYjI0ZC00ZjU4LTg2ZDktNTNiN2I2ODM4YjY3IzU1YjFjNGUzZTRiMGQ4OTUxMGM2YWEyNw

i want to generate UUID for this

I want to achieve Base64 URL safe encoding in C#. In Java, we have the common Codec library which gives me an URL safe encoded string. How can I achieve the same using C#?

byte[] toEncodeAsBytes = System.Text.ASCIIEncoding.ASCII.GetBytes("StringToEncode");string returnValue = System.Convert.ToBase64String(toEncodeAsBytes);

The above code converts it to Base64, but it pads ==. Is there is way to achieve URL safe encoding?