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2017-05-02metadata: get and set policies from goJoe Richey
This commit adds in the ability to get and set policy data from go using the GetPolicy and SetPolicy functions. This is done via a patch of the x/sys/unix package that exposes the filesystem encryption structures. Note that not all the fields of the PolicyData protocol buffer are needed to get and set policies. The wrapped_policy_keys are not used and will be written and read by other components of fscrypt. To run the policy tests, the environment variable BASE_TEST_DIR must be set to a directory for testing on a filesystem that supports encryption. Change-Id: I13b1d983356845f3ffc1945cedf53234218f32e5
2017-05-02util: convenience utilities for fscryptJoe Richey
This commit adds in the util package. This package provides two functions for creating errors. These functions are: - InvalidInputErrorF - bad input from user or caller - SystemErrorF - low level failure It also adds in a small function for converting Go byte slices into C void pointers. This will be very useful for interoperating with C. Change-Id: I87ad7946dd5fa26e28927590aff4bcc9fd5ce4f7