RSA/NONE/PKCS1Padding giving error as java.security.NoSuchAlgorithmException

Question

I am using "RSA/None/PKCS1Padding" as :

Cipher RSACipher = Cipher.getInstance("RSA/None/PKCS1Padding");

This gives me exception as :

java.security.NoSuchAlgorithmException: Cannot find any provider supporting RSA/None/PKCS1Padding

Thanks for help.

Solution

Try "RSA/ECB/PKCS1Padding" instead if you are running in an Oracle or Open JDK. It does not make too much sense to use a block cipher mode of encryption with RSA, but not all algorithm names are logical within the Java SE providers.

The Bouncy Castle Libraries support "RSA/None/PKCS1Padding" though. So maybe the code was written for Bouncy or Android.

Comments

[brady]

It isn't too sensible, but "RSA/ECB/PKCS1Padding" is the name specified by the Java Standard Algorithm Name documentation. It doesn't handle the v. 1.5 versus 2 padding ambiguity either.

[Maarten Bodewes]

@erickson Even worse, it does not accept data of over keysize - 88 bits either. So what ECB mode would that be?

[artofabhishek]

Thanks Folks. after reading few more documentation here is what it solved. Cipher RSACipher = Cipher.getInstance("RSA/None/PKCS1Padding"); // this should be PKCS1PADDING OR just RSA as Cipher RSACipher = Cipher.getInstance("RSA"); // default for "RSA/None/PKCS1PADDING" mentioned here : javadoc.iaik.tugraz.at/iaik_jce/current/iaik/pkcs/pkcs1/…

[Maarten Bodewes]

The Security architecture is case insensitive for algorithm names. Furthermore, you should always specify the mode and padding otherwise the provider may choose it's own defaults - and the defaults may differ for each provider. So what you wrote above is very dangerous.

[artofabhishek]

Thanks, I'll provide provider name.