Add CustomHash class

[bworrell]

What do ya'll think about adding a CustomHash class which streamlines the creation of non-default hash types.

It could possibly derive from cybox.common.Hash but set the type_ field to an instance of cybox.common.String rather than cybox.common.VocabString (I'm not positive that'd work as planned).

It's not difficult to override the xsi:type, but it requires some in depth knoweldge of the data model and XML:

h = Hash("deadbeef", 'FOOHASH')
h.type_.xsi_type = None  # this is a bit tricky
print h.to_xml()

This yields:

<cyboxCommon:HashType
        xmlns:cyboxCommon="http://cybox.mitre.org/common-2"
        xmlns:cyboxVocabs="http://cybox.mitre.org/default_vocabularies-2"
        xmlns:example="http://example.com"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://cybox.mitre.org/common-2 http://cybox.mitre.org/XMLSchema/common/2.1/cybox_common.xsd http://cybox.mitre.org/default_vocabularies-2 http://cybox.mitre.org/XMLSchema/default_vocabularies/2.1/cybox_default_vocabularies.xsd">
    <cyboxCommon:Type>FOOHASH</cyboxCommon:Type>
    <cyboxCommon:Simple_Hash_Value>deadbeef</cyboxCommon:Simple_Hash_Value>
</cyboxCommon:HashType>

`h =  CustomHash('deadbeef', 'FOOHASH')  # automatically unsets the @xsi:type
print h.to_xml()

[gtback]

What about just adding a add_custom_hash() function to the HashList (and maybe types that use it, such as File)? I don't like adding more classes that aren't actual CybOX types (things like EmailAddress continually cause trouble).

[bworrell]

Sure! I'm not married to the class-based approach and was mostly just brain dumping :)