/*
* Copyright ( c ) 2006 , 2018 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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*/
/**
* @ test
* @ bug 6457422 6931562 8180570
* @ summary Confirm that plaintext can be encrypted and then decrypted using the
* RSA cipher in the SunMSCAPI crypto provider . NOTE : The RSA cipher is
* absent from the SunMSCAPI provider in OpenJDK builds .
* @ requires os . family = = " windows "
*/
import javax.crypto.Cipher;
import java.security.GeneralSecurityException;
import java.security.KeyPairGenerator;
import java.security.KeyPair;
import java.security.Key;
public class RSAEncryptDecrypt {
public static final byte [] PLAINTEXT = {1 ,2 ,3 ,4 ,5 ,6 ,7 ,8 ,9 ,0 ,1 ,2 ,3 ,4 ,5 ,6 };
public static void main(String[] args) throws Exception {
KeyPairGenerator generator =
KeyPairGenerator.getInstance("RSA" , "SunMSCAPI" );
KeyPair keyPair = generator.generateKeyPair();
Key publicKey = keyPair.getPublic();
Key privateKey = keyPair.getPrivate();
Cipher cipher = null ;
try {
cipher = Cipher.getInstance("RSA" , "SunMSCAPI" );
} catch (GeneralSecurityException e) {
System.out.println("Cipher not supported by provider, skipping..." );
return ;
}
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
displayBytes("Plaintext data:" , PLAINTEXT);
byte [] data = cipher.doFinal(PLAINTEXT);
displayBytes("Encrypted data:" , data);
cipher.init(Cipher.DECRYPT_MODE, privateKey);
data = cipher.doFinal(data);
displayBytes("Decrypted data:" , data);
}
private static void displayBytes(String label, byte [] bytes) {
System.out.println(label + " [length=" + bytes.length + "]" );
for (byte b : bytes) {
System.out.print("0x" + Integer.toHexString(b & 0 xFF) + " " );
}
System.out.println();
}
}
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