1 files changed, 82 insertions, 0 deletions
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/util/SessionEncrytionUtil.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/util/SessionEncrytionUtil.java
new file mode 100644
index 000000000..4ae4e5c44
--- /dev/null
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/util/SessionEncrytionUtil.java
@@ -0,0 +1,82 @@
+package at.gv.egovernment.moa.id.util;
+
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.KeySpec;
+
+import javax.crypto.Cipher;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.SecretKey;
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.PBEKeySpec;
+import javax.crypto.spec.SecretKeySpec;
+
+import at.gv.egovernment.moa.id.BuildException;
+import at.gv.egovernment.moa.id.config.auth.AuthConfigurationProvider;
+import at.gv.egovernment.moa.logging.Logger;
+
+public class SessionEncrytionUtil {
+
+	static SecretKey secret = null;
+
+	static {
+		try {
+			String key = AuthConfigurationProvider.getInstance().getMOASessionEncryptionKey();
+			
+			if (key != null) {
+				SecretKeyFactory factory;
+
+					factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
+					KeySpec spec = new PBEKeySpec(key.toCharArray(), "TestSALT".getBytes(), 1024, 128);
+					SecretKey tmp = factory.generateSecret(spec);
+					secret = new SecretKeySpec(tmp.getEncoded(), "AES");
+					
+			} else {
+				Logger.warn("MOASession encryption is deaktivated.");
+			}
+			
+		} catch (Exception e) {
+			Logger.warn("MOASession encryption can not be inizialized.", e);
+		}
+		
+	}
+	
+	public static byte[] encrypt(byte[] data) throws BuildException {
+		Cipher cipher;
+		
+		if (secret != null) {
+			try {
+				cipher = Cipher.getInstance("AES/ECB/"+"ISO10126Padding");
+			    cipher.init(Cipher.ENCRYPT_MODE, secret);
+				
+			    Logger.debug("Encrypt MOASession");
+			    return cipher.doFinal(data);
+			    
+			} catch (Exception e) {
+				Logger.warn("MOASession is not encrypted",e);
+				throw new BuildException("MOASession is not encrypted", new Object[]{}, e);
+			}
+		} else
+			return data;
+	}
+	
+	public static byte[] decrypt(byte[] data) throws BuildException {
+		Cipher cipher;
+		
+		if (secret != null) {
+			try {
+				cipher = Cipher.getInstance("AES/ECB/"+"ISO10126Padding");
+			    cipher.init(Cipher.DECRYPT_MODE, secret);
+				
+			    Logger.debug("Decrypt MOASession");
+			    return cipher.doFinal(data);
+			    
+			} catch (Exception e) {
+				Logger.warn("MOASession is not decrypted",e);
+				throw new BuildException("MOASession is not decrypted", new Object[]{}, e);
+			}
+		} else
+		return data;
+	}
+}