Base 64 encoding with Scala or Java

Question

I have tried :

val md = java.security.MessageDigest.getInstance("SHA-1") val result = new sun.misc.BASE64Encoder().encode(md.digest("user:pass".getBytes)) 

RESULT:

md: java.security.MessageDigest = SHA-1 Message Digest from SUN, <initialized> result: String = smGaoVKd/cQkjm7b88GyorAUz20= 

I also tried :

import java.net.URLEncoder val result = URLEncoder.encode(user + ":" + pass, "UTF-8") 

RESULT:

result: String = user%3Apass 

Based on http://www.base64encode.org/ The value I am wanting for result should be "dXNlcjpwYXNz"

What is the site doing differently from these encodings? Also, how might I mimic the site in Java/Scala?

Note, the specific application is for a header using Basic Authentication.

Answer 1

Since Java 8 there are handy utility classes directly in the standard library: Base64.Decoder and Base64.Encoder. There are also some static factory methods to construct instances of these classes which perform Base64 encoding/decoding for various flavors of Base64 in Base64 class.

This is how to use the encoder:

import java.util.Base64 import java.nio.charset.StandardCharsets  Base64.getEncoder.encodeToString("user:pass".getBytes(StandardCharsets.UTF_8)) 

Answer 2

To get "user:pass" to "dXNlcjpwYXNz", you should be base64-encoding the UTF-8 encoded string, but not hashing.

Using the third-party Guava library, I can run

System.out.println(BaseEncoding.base64()     .encode("user:pass".getBytes(Charsets.UTF_8))); 

and I get out

dXNlcjpwYXNz 

as requested. The other Base64 encoders should work similarly.