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.

Can you please provide more information like, java version, any 3rd party libraries, is it Oracle JDK, Windows or linux etc? — avijendr
– avijendr, Commented Jan 7, 2014 at 0:04
I also faced this issue. But when I restart the server it is working. — Thirumalvalavan
– Thirumalvalavan, Commented Jun 9, 2017 at 9:04

Maarten Bodewes · Accepted Answer · 2014-01-07 00:28:37Z

4

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.

answered Jan 7, 2014 at 0:28

Maarten Bodewes

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5 Comments

erickson Over a year ago

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 Over a year ago

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

artofabhishek Over a year ago

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 Over a year ago

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 Over a year ago

Thanks, I'll provide provider name.

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