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Contents
module Xmlenc
class EncryptedData
ALGORITHMS = {
'http://www.w3.org/2001/04/xmlenc#tripledes-cbc' => Algorithms::DES3CBC,
'http://www.w3.org/2001/04/xmlenc#aes128-cbc' => Algorithms::AESCBC[128],
'http://www.w3.org/2001/04/xmlenc#aes256-cbc' => Algorithms::AESCBC[256]
}
TYPES = {
'http://www.w3.org/2001/04/xmlenc#Element' => :element,
'http://www.w3.org/2001/04/xmlenc#Content' => :content,
}
attr_accessor :node
def initialize(node)
@node = node
end
def document
@node.document
end
def encryption_method
at_xpath('./xenc:EncryptionMethod')
end
def cipher_value
at_xpath('./xenc:CipherData/xenc:CipherValue').content.gsub(/[\n\s]/, '')
end
def cipher_value=(value)
at_xpath('./xenc:CipherData/xenc:CipherValue').content = value
end
def decrypt(key)
decryptor = algorithm.setup(key)
decrypted = decryptor.decrypt(Base64.decode64(cipher_value), :node => encryption_method)
@node.replace(Nokogiri::XML::DocumentFragment.parse(decrypted)) unless @node == document.root
decrypted
end
def encrypt(data)
encryptor = algorithm.setup
encrypted = encryptor.encrypt(data, :node => encryption_method)
self.cipher_value = Base64.encode64(encrypted)
encryptor.key
end
def type
TYPES[@node['Type']]
end
private
def at_xpath(xpath)
@node.at_xpath(xpath, NAMESPACES)
end
def algorithm
algorithm = encryption_method['Algorithm']
ALGORITHMS[algorithm] ||
raise(UnsupportedError.new("Unsupported encryption method #{algorithm}"))
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems