Update signal-service-java dependency

[signal-cli] / src / main / java / org / asamk / signal / util / KeyUtils.java

diff --git a/src/main/java/org/asamk/signal/util/KeyUtils.java b/src/main/java/org/asamk/signal/util/KeyUtils.java
new file mode 100644 (file)
index 0000000..ab42138
--- /dev/null
+++ b/src/main/java/org/asamk/signal/util/KeyUtils.java
@@ -0,0 +1,47 @@
+package org.asamk.signal.util;
+
+import org.whispersystems.signalservice.internal.util.Base64;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+
+public class KeyUtils {
+
+    private KeyUtils() {
+    }
+
+    public static String createSignalingKey() {
+        return getSecret(52);
+    }
+
+    public static byte[] createProfileKey() {
+        return getSecretBytes(32);
+    }
+
+    public static String createPassword() {
+        return getSecret(18);
+    }
+
+    public static byte[] createGroupId() {
+        return getSecretBytes(16);
+    }
+
+    private static String getSecret(int size) {
+        byte[] secret = getSecretBytes(size);
+        return Base64.encodeBytes(secret);
+    }
+
+    private static byte[] getSecretBytes(int size) {
+        byte[] secret = new byte[size];
+        getSecureRandom().nextBytes(secret);
+        return secret;
+    }
+
+    private static SecureRandom getSecureRandom() {
+        try {
+            return SecureRandom.getInstance("SHA1PRNG");
+        } catch (NoSuchAlgorithmException e) {
+            throw new AssertionError(e);
+        }
+    }
+}