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##
# This class represents a keygen (public / private key generator) found in a
# Form. The field will automatically generate a key pair and compute its own
# value to match the challenge. Call key to access the public/private key
# pair.
class Mechanize::Form::Keygen < Mechanize::Form::Field
# The challenge for this <keygen>.
attr_reader :challenge
# The key associated with this <keygen> tag.
attr_reader :key
def initialize(node, value = nil)
super
@challenge = node['challenge']
@spki = OpenSSL::Netscape::SPKI.new
@spki.challenge = @challenge
@key = nil
generate_key if value.nil? || value.empty?
end
# Generates a key pair and sets the field's value.
def generate_key(key_size = 2048)
# Spec at http://dev.w3.org/html5/spec/Overview.html#the-keygen-element
@key = OpenSSL::PKey::RSA.new key_size
@spki.public_key = @key.public_key
@spki.sign @key, OpenSSL::Digest::MD5.new
self.value = @spki.to_pem
end
end
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