Module: Origami::Encryption::EncryptedDocument

Defined in:
lib/origami/encryption.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#encryption_dict=(value) ⇒ Object (writeonly)

Sets the attribute encryption_dict

Parameters:

  • value —

    the value to set the attribute encryption_dict to.



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# File 'lib/origami/encryption.rb', line 323

def encryption_dict=(value)
  @encryption_dict = value
end

#encryption_key=(value) ⇒ Object (writeonly)

Sets the attribute encryption_key

Parameters:

  • value —

    the value to set the attribute encryption_key to.



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# File 'lib/origami/encryption.rb', line 322

def encryption_key=(value)
  @encryption_key = value
end

#stm_algo=(value) ⇒ Object (writeonly)

Sets the attribute stm_algo

Parameters:

  • value —

    the value to set the attribute stm_algo to.



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# File 'lib/origami/encryption.rb', line 324

def stm_algo=(value)
  @stm_algo = value
end

#str_algo=(value) ⇒ Object (writeonly)

Sets the attribute str_algo

Parameters:

  • value —

    the value to set the attribute str_algo to.



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# File 'lib/origami/encryption.rb', line 325

def str_algo=(value)
  @str_algo = value
end

Instance Method Details

#build(obj, revision, options) ⇒ Object

:nodoc:



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# File 'lib/origami/encryption.rb', line 331

def build(obj, revision, options) #:nodoc:
  if obj.is_a?(EncryptedObject) # already built
    if options[:decrypt] == true
      obj.pre_build
      obj.decrypt!
      obj.decrypted = false # makes it believe no encryption pass is required
      obj.post_build
    end

    return
  end
     
  if obj.is_a?(ObjectStream)
    obj.each do |subobj|
      build(subobj, revision, options)
    end
  end

  obj.pre_build

  case obj
  when String
    if not obj.equal?(@encryption_dict[:U]) and 
       not obj.equal?(@encryption_dict[:O]) and 
       not obj.equal?(@encryption_dict[:UE]) and 
       not obj.equal?(@encryption_dict[:OE]) and 
       not obj.equal?(@encryption_dict[:Perms]) and 
       not (obj.parent.is_a?(Signature::DigitalSignature) and obj.equal?(obj.parent[:Contents])) and
       not obj.indirect_parent.parent.is_a?(ObjectStream)
      
      obj.extend(EncryptedString)
      obj.decrypted = true
      obj.encryption_handler = @encryption_dict
      obj.encryption_key = @encryption_key
      obj.algorithm = @str_algo
    end

  when Stream
    return if obj.is_a?(XRefStream)
    return if obj.equal?(self.Catalog.Metadata) and not @encryption_dict.EncryptMetadata
    obj.extend(EncryptedStream)
    obj.decrypted = true
    obj.encryption_handler = @encryption_dict
    obj.encryption_key = @encryption_key
    obj.algorithm = @stm_algo

  when Dictionary, Array
    obj.map! do |subobj|
      if subobj.is_indirect?
        if get_object(subobj.reference)
          subobj.reference
        else
          ref = add_to_revision(subobj, revision)
          build(subobj, revision, options)
          ref
        end
      else
        subobj
      end
    end
    
    obj.each do |subobj|
      build(subobj, revision, options)
    end
  end

  obj.post_build
end