1 files changed, 50 insertions, 0 deletions
diff --git a/src/main/java/org/openslx/satellitedaemon/util/RndStringEncrypt.java b/src/main/java/org/openslx/satellitedaemon/util/RndStringEncrypt.java
new file mode 100644
index 0000000..c99a768
--- /dev/null
+++ b/src/main/java/org/openslx/satellitedaemon/util/RndStringEncrypt.java
@@ -0,0 +1,50 @@
+package org.openslx.satellitedaemon.util;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.KeyPair;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.Signature;
+import java.security.SignatureException;
+import java.security.UnrecoverableKeyException;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateException;
+
+public class RndStringEncrypt {
+
+	KeyPair pair;
+
+	public RndStringEncrypt(String alias, String password, String file)
+			throws NoSuchAlgorithmException, CertificateException,
+			FileNotFoundException, IOException, KeyStoreException,
+			UnrecoverableKeyException {
+		KeyStore keystore = KeyStore.getInstance("JKS");
+		keystore.load(new FileInputStream(new File(file)),
+				password.toCharArray());
+		Certificate cert = null;
+
+		Key key = keystore.getKey(alias, password.toCharArray());
+
+		if (key instanceof PrivateKey) {
+			cert = keystore.getCertificate(alias);
+			PublicKey publicKey = cert.getPublicKey();
+			pair = new KeyPair(publicKey, (PrivateKey) key);
+		}
+	}
+
+	public byte[] encryptRndString(String message) throws NoSuchAlgorithmException,
+			InvalidKeyException, SignatureException {
+		Signature signature = Signature.getInstance("SHA256WITHRSA");
+		signature.initSign(pair.getPrivate());
+		signature.update(message.getBytes());
+		return signature.sign();
+	}
+}