Nathan Reller c21f07634b Added SQLAlchemy Code for Symmetric Key
The code for persisting symmetric keys in a database has been added
along with the corresponding unit tests.

The usage mask list for cryptographic objects is stored as an integer bitmask.
The conversion takes place with a new SQLAlchemy type.

Switched ManagedObject value type to VARBINARY. This prevents errors from
occuring when trying to convert to a string.
2016-02-19 09:23:51 -05:00
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2016-01-29 13:29:36 -05:00
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