Suggestion required regarding generation of Public-Private Key with SATSA

[basha_ahmad]

Hi

I am planning to implement RSA based encryption in J2ME.

I could get information about SATSA which comes bundled with J2ME. I could get see that there are classes which actually allows you to encrypt with a public key.

However, I could not locate the classes which would allow me to generate the public-private key pair (as I could not find classes available within SATSA or MIDP to do this)

Can somebody please provide me a suggestion or any other alternative to generate the public-private key pair (based on RSA)?

Regards
Ahmad

[ravivalecha]

Hi,

For encrypt/decrypt using public-private key you can use Bauncy Castle API

By using SATSA using public key..

byte[] publicKeyBits;
// Assign publicKeyBits here.
X509EncodedKeySpec pks = new X509EncodedKeySpec(publicKeyBits);
KeyFactory kf = KeyFactory.getInstance("RSA");
PublicKey publicKey = kf.generatePublic(pks);

Signature signature = Signature.getInstance("SHA1withRSA");
signature.initVerify(publicKey);
signature.update(kData, 0, kData.length);

boolean pass = signature.verify(kSignature);




Thanks
Ravi

[basha_ahmad]

Hello Ravi,

Can you please let me know how to get the key i.e. value to be assigned to byte[] publicKeyBits;

This is the public key i am referring to. This needs to be generated in a pair. (as both private and public key are needed). So, if you know a way to generate the pair then it would be helpful to me.

Regards
Ahmad

[simokech]

Hi all,

I'm working on j2me application for Asymmetric encrypting / decrypting sms for symbian OS..
I've tried both BouncyCastle and Satsa for crypting but I'm facing to the same error wich is:

...
Class org.netbeans.modules.classfile.StackMapFrame loaded from ant loader (parentFirst)
at com.sun.midp.crypto.Util.cloneArray(), bci=1
at java.security.spec.EncodedKeySpec.<init>(EncodedKeySpec.java:39)
at java.security.spec.X509EncodedKeySpec.<init>(X509EncodedKeySpec.java:47)
at hello.Rsa.encodeKey(Rsa.java:48)
at hello.Rsa.startApp(Rsa.java:33)
at javax.microedition.midlet.MIDletTunnelImpl.callStartApp(), bci=1
at com.sun.midp.midlet.MIDletPeer.startApp(), bci=7
at com.sun.midp.midlet.MIDletStateHandler.startSuite(), bci=269
at com.sun.midp.main.AbstractMIDletSuiteLoader.startSuite(), bci=52
at com.sun.midp.main.CldcMIDletSuiteLoader.startSuite(), bci=8
at com.sun.midp.main.AbstractMIDletSuiteLoader.runMIDletSuite(), bci=161
at com.sun.midp.main.AppIsolateMIDletSuiteLoader.main(), bci=26
java.lang.NullPointerException: 0

I search for this error 10 days ago and Im really blocked...

Many thx before,

Simo