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List:       ruby-talk
Subject:    Re: help please - openssl and ruby
From:       Chris Catton <chrisc () amphora-research ! com>
Date:       2006-12-31 14:29:40
Message-ID: 5c1345130919500ae26fb483f5b8b7d8 () ruby-forum ! com
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Jan Svitok wrote:

> 
> Summary: That shouldn't be a problem unless the n and e are somehow 
> preserved.
> That obvoiusly doesn't answer your primary question... I can't say.
> Maybe format of the data? If you could post the exact data and exact
> (fully working) code, I may have a look at it.

Thanks jan - you were right that the difference between the keys was not 
causing the problem.  For future readers, the way to do what i was 
trying to achieve is simple and obvious:

pkey=OpenSSL::PKey::RSA.new(Base64.decode64(userPublicKey))
  if ( pkey.verify( OpenSSL::Digest::SHA512.new, 
Base64.decode64(signatureValue), signatureText ))
    puts " OK: Signature OK"
  else
    puts " ERROR: Signature failed"
  end

I think when I first tried this, I didn't decode the signature, then saw 
the difference in the keys and this threw me off track ...

C

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