Class: WSS4R::Security::Xml::SignedInfo

Inherits:
Object
  • Object
show all
Defined in:
lib/wss4r/security/xml/signed_info.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ SignedInfo

Returns a new instance of SignedInfo.



8
9
10
 
# File 'lib/wss4r/security/xml/signed_info.rb', line 8

def initialize()
         @reference_elements = ReferenceElements.new()
end

Instance Attribute Details

#canonicalizer_method ⇒ Object

Returns the value of attribute canonicalizer_method.



6
7
8
 
# File 'lib/wss4r/security/xml/signed_info.rb', line 6

def canonicalizer_method
  @canonicalizer_method
end

#signature_method ⇒ Object

Returns the value of attribute signature_method.



6
7
8
 
# File 'lib/wss4r/security/xml/signed_info.rb', line 6

def signature_method
  @signature_method
end

Instance Method Details

#process(parent) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
 
# File 'lib/wss4r/security/xml/signed_info.rb', line 12

def process(parent)
         @par = parent
         body = SOAPParser.part(SOAPParser::BODY)
         body.add_namespace("xmlns:wsu", Namespaces::WSU)
         signed_info_element = parent.add_element(Names::SIGNED_INFO)
         canonicalization_element = signed_info_element.add_element(Names::CANONICALIZATION_METHOD)
         canonicalization_element.add_attribute("Algorithm", Types::CANON_C14N_EXCL)
         signature_method_element = signed_info_element.add_element(Names::SIGNATURE_METHOD)
         signature_method_element.add_attribute("Algorithm", Types::SIG_ALG_RSA_SHA1)
         @reference_elements.each{|xpath|
           element = parent.document.select(xpath)
           wsu_id = nil
           element.attributes().each_attribute{|attr|
             wsu_id = attr if (attr.name() == "Id") #attr.prefix() == "wsu" && 
           }
           if (wsu_id == nil)
             wsu_id = REXML::Attribute.new("wsu:Id", element.object_id().to_s())
             element.add_attribute(wsu_id)
           end
           canonicalizer = TransformerFactory::get_instance(nil)
           c14n_element = canonicalizer.canonicalize_element(element)
           reference_element = signed_info_element.add_element(Names::REFERENCE_DS)
           reference_element.add_attribute("URI","#"+wsu_id.value())
           transforms_element = reference_element.add_element(Names::TRANSFORMS)
           transform_element = transforms_element.add_element(Names::TRANSFORM)
           transform_element.add_attribute("Algorithm", Types::CANON_C14N_EXCL)
           digest_method_element = reference_element.add_element(Names::DIGEST_METHOD)
           digest_method_element.add_attribute("Algorithm", Types::DIG_METHOD_SHA1)
           digest_value_element = reference_element.add_element(Names::DIGEST_VALUE)
		
           sha = OpenSSL::Digest::SHA1.new(c14n_element)
           #Bug from Tony Baines
           digest_value_element.text=(Base64.encode64(sha.digest()))
         }
         signed_info_element
end

#unprocess(document) ⇒ Object 



49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
 
# File 'lib/wss4r/security/xml/signed_info.rb', line 49

def unprocess(document)
         @reference_list = Array.new()
	
         signed_info = XPath.first(document, "//ds:SignedInfo", {"ds" => Namespaces::DS})
	
         inclusive_namespaces = XPath.first(signed_info, "ds:CanonicalizationMethod/InclusiveNamespaces", {"ds" => Namespaces::DS})
         prefix_list = inclusive_namespaces.attribute("PrefixList") if (inclusive_namespaces)
         if (prefix_list)
           prefix_list = prefix_list.value().split()
         end
	
         canonicalization_method = XPath.first(signed_info, Names::CANONICALIZATION_METHOD)
         @canonicalization_method = canonicalization_method.attribute("Algorithm").value()
	
         signature_method = XPath.first(signed_info, Names::SIGNATURE_METHOD)
         @signature_method = signature_method.attribute("Algorithm")
	
         signed_info.each_element("ds:Reference"){|reference|
           @reference_list.push(Reference.new(reference, prefix_list))
         }
end

#verify ⇒ Object 



71
72
73
74
75
76
77
78
 
# File 'lib/wss4r/security/xml/signed_info.rb', line 71

def verify()
         @reference_list.each{|reference|
           if (reference.verify() == false)
             fault = SOAP::SOAPFault.new(SOAP::SOAPString.new("wsse:FailedCheck"), SOAP::SOAPString.new("The signature or decryption was invalid."),SOAP::SOAPString.new(self.class().name())) #,"Error verifying reference: " + reference.uri())
             raise SOAP::FaultError.new(fault)
           end
         }
end