Class: Xmldsig::Reference
- Inherits:
-
Object
- Object
- Xmldsig::Reference
show all
- Defined in:
- lib/xmldsig/reference.rb
Defined Under Namespace
Classes: ReferencedNodeNotFound
Instance Attribute Summary collapse
Instance Method Summary
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Constructor Details
#initialize(reference, id_attr = nil) ⇒ Reference
Returns a new instance of Reference.
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# File 'lib/xmldsig/reference.rb', line 8
def initialize(reference, id_attr = nil)
@reference = reference
@errors = []
@id_attr = id_attr
end
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Instance Attribute Details
#errors ⇒ Object
Returns the value of attribute errors.
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# File 'lib/xmldsig/reference.rb', line 3
def errors
@errors
end
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#id_attr ⇒ Object
Returns the value of attribute id_attr.
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# File 'lib/xmldsig/reference.rb', line 3
def id_attr
@id_attr
end
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#reference ⇒ Object
Returns the value of attribute reference.
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# File 'lib/xmldsig/reference.rb', line 3
def reference
@reference
end
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Instance Method Details
#calculate_digest_value ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 48
def calculate_digest_value
transformed = transforms.apply(referenced_node)
case transformed
when String
digest_method.digest transformed
when Nokogiri::XML::Node
digest_method.digest Canonicalizer.new(transformed).canonicalize
end
end
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#digest_method ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 58
def digest_method
algorithm = reference.at_xpath("descendant::ds:DigestMethod", NAMESPACES).get_attribute("Algorithm")
case algorithm
when "http://www.w3.org/2001/04/xmlenc#sha512"
Digest::SHA512
when "http://www.w3.org/2001/04/xmlenc#sha256"
Digest::SHA256
when "http://www.w3.org/2000/09/xmldsig#sha1"
Digest::SHA1
end
end
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#digest_value ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 44
def digest_value
Base64.decode64 reference.at_xpath("descendant::ds:DigestValue", NAMESPACES).content
end
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#digest_value=(digest_value) ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 70
def digest_value=(digest_value)
reference.at_xpath("descendant::ds:DigestValue", NAMESPACES).content =
Base64.encode64(digest_value).chomp
end
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#document ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 14
def document
reference.document
end
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#reference_uri ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 40
def reference_uri
reference.get_attribute("URI")
end
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#referenced_node ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 22
def referenced_node
if reference_uri && reference_uri != ""
id = reference_uri[1..-1]
referenced_node_xpath = @id_attr ? "//*[@#{@id_attr}=$uri]" : "//*[@ID=$uri or @wsu:Id=$uri]"
variable_bindings = { 'uri' => id }
if ref = document.dup.at_xpath(referenced_node_xpath, NAMESPACES, variable_bindings)
ref
else
raise(
ReferencedNodeNotFound,
"Could not find the referenced node #{id}'"
)
end
else
document.dup.root
end
end
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#sign ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 18
def sign
self.digest_value = calculate_digest_value
end
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# File 'lib/xmldsig/reference.rb', line 75
def transforms
Transforms.new(reference.xpath("descendant::ds:Transform", NAMESPACES))
end
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#validate_digest_value ⇒ Object
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# File 'lib/xmldsig/reference.rb', line 79
def validate_digest_value
unless digest_value == calculate_digest_value
@errors << :digest_value
end
end
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