AravindaM · March 16, 2021 05:33 · Oct 1, 2017 · May 18, 2016
diff --git a/README.md b/README.md
@@ -0,0 +1,14 @@
+## Troubleshooting
+
+Error:
+
+```
+unable to write 'random state'
+e is 65537 (0x10001)
+```
+
+solution:
+
+`sudo rm ~/.rnd`
+
+source: https://stackoverflow.com/a/94458/878361
diff --git a/ParseRSAKeys.java b/ParseRSAKeys.java
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+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.security.KeyFactory;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.interfaces.RSAPublicKey;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+import java.util.Base64;
+
+/**
+ * This file is intended to be used on a IDE for testing purposes.
+ * ClassLoader.getSystemResource won't work in a JAR
+ */
+public class Main {
+
+    public static void main(String[] args) throws InvalidKeySpecException, NoSuchAlgorithmException, IOException, URISyntaxException {
+
+        String privateKeyContent = new String(Files.readAllBytes(Paths.get(ClassLoader.getSystemResource("private_key_pkcs8.pem").toURI())));
+        String publicKeyContent = new String(Files.readAllBytes(Paths.get(ClassLoader.getSystemResource("public_key.pem").toURI())));
+
+        privateKeyContent = privateKeyContent.replaceAll("\\n", "").replace("-----BEGIN PRIVATE KEY-----", "").replace("-----END PRIVATE KEY-----", "");
+        publicKeyContent = publicKeyContent.replaceAll("\\n", "").replace("-----BEGIN PUBLIC KEY-----", "").replace("-----END PUBLIC KEY-----", "");;
+
+        KeyFactory kf = KeyFactory.getInstance("RSA");
+
+        PKCS8EncodedKeySpec keySpecPKCS8 = new PKCS8EncodedKeySpec(Base64.getDecoder().decode(privateKeyContent));
+        PrivateKey privKey = kf.generatePrivate(keySpecPKCS8);
+
+        X509EncodedKeySpec keySpecX509 = new X509EncodedKeySpec(Base64.getDecoder().decode(publicKeyContent));
+        RSAPublicKey pubKey = (RSAPublicKey) kf.generatePublic(keySpecX509);
+
+        System.out.println(privKey);
+        System.out.println(pubKey);
+    }
+}
diff --git a/generateKeyPair.sh b/generateKeyPair.sh
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+#!/usr/bin/env bash
+
+openssl genrsa -out private_key.pem 4096
+openssl rsa -pubout -in private_key.pem -out public_key.pem
+
+# convert private key to pkcs8 format in order to import it from Java
+openssl pkcs8 -topk8 -in private_key.pem -inform pem -out private_key_pkcs8.pem -outform pem -nocrypt