Added classes for loading the keys.

Author: claudius108

src/main/java/ro/kuberam/libs/java/crypto/encrypt/AsymmetricEncryption.java

@@ -25,14 +25,9 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.security.InvalidKeyException;
-import java.security.KeyFactory;
 import java.security.NoSuchAlgorithmException;
-import java.security.NoSuchProviderException;
 import java.security.PrivateKey;
 import java.security.PublicKey;
-import java.security.spec.InvalidKeySpecException;
-import java.security.spec.PKCS8EncodedKeySpec;
-import java.security.spec.X509EncodedKeySpec;
 import java.util.Base64;
 import java.util.StringTokenizer;
 
@@ -186,7 +181,6 @@ public static byte[] getBytes(String str) throws IOException {
 		}
 	}
 }
-// move loadPrivateKey() to Key management section
 // add providers to loadPublicKey() and loadPrivateKey()
 // test AsymmetricEncryption with ad-hoc generated keys
 // add AsymmetricEncryption for binaries

src/main/java/ro/kuberam/libs/java/crypto/keyManagement/LoadPrivateKey.java

@@ -9,13 +9,12 @@
 import java.security.spec.InvalidKeySpecException;
 import java.security.spec.PKCS8EncodedKeySpec;
 import java.util.Base64;
+import java.util.Optional;
 
 public class LoadPrivateKey {
 	public static PrivateKey run(String base64PrivateKey, String algorithm, String provider)
 			throws NoSuchAlgorithmException, NoSuchProviderException, InvalidKeySpecException {
-		// provider = Optional.ofNullable(provider).filter(str ->
-		// !str.isEmpty()).orElse("SunRsaSign");
-		provider = "SunRsaSign";
+		provider = Optional.ofNullable(provider).filter(str -> !str.isEmpty()).orElse("SunRsaSign");
 
 		PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(
 				Base64.getDecoder().decode(base64PrivateKey.getBytes(UTF_8)));

src/main/java/ro/kuberam/libs/java/crypto/keyManagement/LoadPublicKey.java

@@ -9,14 +9,13 @@
 import java.security.spec.InvalidKeySpecException;
 import java.security.spec.X509EncodedKeySpec;
 import java.util.Base64;
+import java.util.Optional;
 
 public class LoadPublicKey {
 
 	public static PublicKey run(String base64PublicKey, String algorithm, String provider)
 			throws NoSuchAlgorithmException, NoSuchProviderException, InvalidKeySpecException {
-		// provider = Optional.ofNullable(provider).filter(str ->
-		// !str.isEmpty()).orElse("SunRsaSign");
-		provider = "SunRsaSign";
+		provider = Optional.ofNullable(provider).filter(str -> !str.isEmpty()).orElse("SunRsaSign");
 
 		X509EncodedKeySpec spec = new X509EncodedKeySpec(Base64.getDecoder().decode(base64PublicKey.getBytes(UTF_8)));
 		KeyFactory kf = KeyFactory.getInstance(algorithm, provider);