How to solve the NoSuchAlgorithmException in java?

Question

I am trying to decrypt the data using RSA Algorithm. While doing the decryption, I am getting an exception.That is,

java.security.NoSuchAlgorithmException: Cannot find any provider supporting RSA/ECB/PKCS5Padding
        at javax.crypto.Cipher.getInstance(DashoA13*..)

How to solve this exception? Currently, I am using java version "1.6.0_26" .

Answer 1

It's a typo. The correct name for RSA with PKCS #1 v1.5 padding is "RSA/ECB/PKCS1Padding". Generally, it is a good idea to compare with a list of available algorithms. Eg this question contains some ways to print such a list.

(And of course using OAEP instead of v1.5 padding would be preferable, especially if your main field is not cryptography).

Answer 2

The error means that the library you use cna't decrypt the data because there isn't an algorithm in the Lib which decrypts RSA. You can use a library like Bouncy Calste or GNU Crypto to decrypt data using RSA. There are plenty of samples how to do this on the web.