gistfile1.rb

jruby-1.5.2 > cert = Certificate.encryption_certificate
 => #<Certificate id: 2, cert_type: "encryption", certificate: "-----BEGIN CERTIFICATE-----\nMIICGDCCAYGgAwIBAgIBATA...", keypair: "-----BEGIN RSA PRIVATE KEY-----\nMIICXAIBAAKBgQDPGft...", certifiable_id: nil, certifiable_type: nil, created_at: "2010-09-20 15:27:11", updated_at: "2010-09-20 15:27:11"> 
jruby-1.5.2 > key = OpenSSL::PKey::RSA.new(cert.keypair)
 => -----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
 
jruby-1.5.2 > encrypted_str = Base64.encode64(key.public_encrypt("steamcannon"))
 => "m/Unn6mL0uuzaIOVPyllrLAH+7hgnwIzxPcyBvLwXLNLQ7VVbdUkGvIeRBsP\nBSxBix/M3wxteJd+tyogmNhujNJ8UnEtkLeeVGw3cmerX9I3oShro6j3Jl3d\nt1IWfz5medxh9m0o3ppHcdtn4vT1d6gMPjoaO4f0JGw2GykKM7U=\n" 
jruby-1.5.2 > key.private_decrypt(Base64.decode64(encrypted_str))
 => "steamcannon" 
jruby-1.5.2 > 

Thanks for your concern, but that's not my key