com.yahoo.security.YBase64 Maven / Gradle / Ivy
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.security;
import java.util.Base64;
/**
* Variant of {@link java.util.Base64} with the following modifications:
* - {@code +} is replaced by {@code .}
* - {@code /} is replaced by {code _}
* - {@code =} is replaced by {code -}
*
* @author bjorncs
*/
public class YBase64 {
private YBase64() {}
public static byte[] decode(byte[] in) {
byte[] rewritten = new byte[in.length];
for (int i = 0; i < in.length; i++) {
if (in[i] == '.') rewritten[i] = '+';
else if (in[i] == '_') rewritten[i] = '/';
else if (in[i] == '-') rewritten[i] = '=';
else rewritten[i] = in[i];
}
return Base64.getDecoder().decode(rewritten);
}
public static byte[] encode(byte[] in) {
byte[] encoded = Base64.getEncoder().encode(in);
for (int i = 0; i < encoded.length; i++) {
if (encoded[i] == '+') encoded[i] = '.';
else if (encoded[i] == '/') encoded[i] = '_';
else if (encoded[i] == '=') encoded[i] = '-';
}
return encoded;
}
}