Class: XMLSecurity::Document

Inherits:
BaseDocument show all
Defined in:
lib/xml_security.rb

Constant Summary collapse

RSA_SHA1 =
"http://www.w3.org/2000/09/xmldsig#rsa-sha1"
RSA_SHA256 =
"http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"
RSA_SHA384 =
"http://www.w3.org/2001/04/xmldsig-more#rsa-sha384"
RSA_SHA512 =
"http://www.w3.org/2001/04/xmldsig-more#rsa-sha512"
SHA1 =
"http://www.w3.org/2000/09/xmldsig#sha1"
SHA256 =
'http://www.w3.org/2001/04/xmlenc#sha256'
SHA384 =
"http://www.w3.org/2001/04/xmldsig-more#sha384"
SHA512 =
'http://www.w3.org/2001/04/xmlenc#sha512'
ENVELOPED_SIG =
"http://www.w3.org/2000/09/xmldsig#enveloped-signature"
INC_PREFIX_LIST =
"#default samlp saml ds xs xsi md"

Constants inherited from BaseDocument

BaseDocument::C14N, BaseDocument::DSIG, BaseDocument::NOKOGIRI_OPTIONS

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from BaseDocument

#algorithm, #canon_algorithm

Instance Attribute Details

#uuidObject

Returns the value of attribute uuid


94
95
96
# File 'lib/xml_security.rb', line 94

def uuid
  @uuid
end

Instance Method Details

#sign_document(private_key, certificate, signature_method = RSA_SHA1, digest_method = SHA1) ⇒ Object

</Signature>


117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
# File 'lib/xml_security.rb', line 117

def sign_document(private_key, certificate, signature_method = RSA_SHA1, digest_method = SHA1)
  noko = Nokogiri::XML(self.to_s) do |config|
    config.options = XMLSecurity::BaseDocument::NOKOGIRI_OPTIONS
  end

  signature_element = REXML::Element.new("ds:Signature").add_namespace('ds', DSIG)
  signed_info_element = signature_element.add_element("ds:SignedInfo")
  signed_info_element.add_element("ds:CanonicalizationMethod", {"Algorithm" => C14N})
  signed_info_element.add_element("ds:SignatureMethod", {"Algorithm"=>signature_method})

  # Add Reference
  reference_element = signed_info_element.add_element("ds:Reference", {"URI" => "##{uuid}"})

  # Add Transforms
  transforms_element = reference_element.add_element("ds:Transforms")
  transforms_element.add_element("ds:Transform", {"Algorithm" => ENVELOPED_SIG})
  c14element = transforms_element.add_element("ds:Transform", {"Algorithm" => C14N})
  c14element.add_element("ec:InclusiveNamespaces", {"xmlns:ec" => C14N, "PrefixList" => INC_PREFIX_LIST})

  digest_method_element = reference_element.add_element("ds:DigestMethod", {"Algorithm" => digest_method})
  inclusive_namespaces = INC_PREFIX_LIST.split(" ")
  canon_doc = noko.canonicalize(canon_algorithm(C14N), inclusive_namespaces)
  reference_element.add_element("ds:DigestValue").text = compute_digest(canon_doc, algorithm(digest_method_element))

  # add SignatureValue
  noko_sig_element = Nokogiri::XML(signature_element.to_s) do |config|
    config.options = XMLSecurity::BaseDocument::NOKOGIRI_OPTIONS
  end

  noko_signed_info_element = noko_sig_element.at_xpath('//ds:Signature/ds:SignedInfo', 'ds' => DSIG)
  canon_string = noko_signed_info_element.canonicalize(canon_algorithm(C14N))

  signature = compute_signature(private_key, algorithm(signature_method).new, canon_string)
  signature_element.add_element("ds:SignatureValue").text = signature

  # add KeyInfo
  key_info_element       = signature_element.add_element("ds:KeyInfo")
  x509_element           = key_info_element.add_element("ds:X509Data")
  x509_cert_element      = x509_element.add_element("ds:X509Certificate")
  if certificate.is_a?(String)
    certificate = OpenSSL::X509::Certificate.new(certificate)
  end
  x509_cert_element.text = Base64.encode64(certificate.to_der).gsub(/\n/, "")

  # add the signature
  issuer_element = self.elements["//saml:Issuer"]
  if issuer_element
    self.root.insert_after issuer_element, signature_element
  else
    if sp_sso_descriptor = self.elements["/md:EntityDescriptor"]
      self.root.insert_before sp_sso_descriptor, signature_element
    else
      self.root.add_element(signature_element)
    end
  end
end