Class: XMLSignature

Inherits:
Object
  • Object
show all
Defined in:
lib/xml_signature.rb,
lib/xml_signature/version.rb

Constant Summary collapse

VERSION = 
'0.1'

Instance Method Summary collapse

Constructor Details

#initialize(xml) ⇒ XMLSignature

xml - A REXML document



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# File 'lib/xml_signature.rb', line 10

def initialize(xml)
  @xml = xml.dup
  @ds_signature = xpath(@xml, '//ds:Signature')
  @ds_signature.remove
end

Instance Method Details

#verify(expected_certificate) ⇒ Object 



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# File 'lib/xml_signature.rb', line 16

def verify(expected_certificate)
  raise "Certificate mismatch" if expected_certificate != given_certificate

  REXML::XPath.each(@ds_signature, "//ds:Reference") do |ref|
    raise "Digest mismatch!" if computed_digest_value(ref) != given_digest_value(ref)
  end

  raise "Signature mismatch" \
    unless certificate.public_key.verify(signature_algorithm_class.new,
                                         signature,
                                         c14n(xpath(@ds_signature, "//ds:SignedInfo")))
  true
end