nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/util/Util.java

   1 package org.asamk.signal.util;
   2
   3 import org.whispersystems.signalservice.internal.util.Base64;
   4
   5 import java.io.File;
   6 import java.io.IOException;
   7 import java.security.NoSuchAlgorithmException;
   8 import java.security.SecureRandom;
   9
  10 public class Util {
  11     public static String getSecret(int size) {
  12         byte[] secret = getSecretBytes(size);
  13         return Base64.encodeBytes(secret);
  14     }
  15
  16     public static byte[] getSecretBytes(int size) {
  17         byte[] secret = new byte[size];
  18         getSecureRandom().nextBytes(secret);
  19         return secret;
  20     }
  21
  22     private static SecureRandom getSecureRandom() {
  23         try {
  24             return SecureRandom.getInstance("SHA1PRNG");
  25         } catch (NoSuchAlgorithmException e) {
  26             throw new AssertionError(e);
  27         }
  28     }
  29
  30     public static File createTempFile() throws IOException {
  31         return File.createTempFile("signal_tmp_", ".tmp");
  32     }
  33 }