Add SALTEDSHA512 Encryption

src/main/java/fr/xephi/authme/security/crypts/SALTEDSHA512.java

@@ -0,0 +1,32 @@
+package fr.xephi.authme.security.crypts;
+
+import java.math.BigInteger;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+import fr.xephi.authme.AuthMe;
+
+public class SALTEDSHA512 implements EncryptionMethod {
+
+    @Override
+    public String getHash(String password, String salt, String name)
+            throws NoSuchAlgorithmException {
+        return getSHA512(password + salt);
+    }
+
+    @Override
+    public boolean comparePassword(String hash, String password,
+            String playerName) throws NoSuchAlgorithmException {
+        String salt = AuthMe.getInstance().database.getAuth(playerName).getSalt();
+        return hash.equals(getHash(password, salt, ""));
+    }
+
+    private static String getSHA512(String message)
+            throws NoSuchAlgorithmException {
+        MessageDigest sha512 = MessageDigest.getInstance("SHA-512");
+        sha512.reset();
+        sha512.update(message.getBytes());
+        byte[] digest = sha512.digest();
+        return String.format("%0" + (digest.length << 1) + "x", new BigInteger(1, digest));
+    }
+}