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In addition to using callbacks, unlocked Protectors can now directly
unlock a policy. The error codes are updated to make more sense.
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This commit changes all the internal import paths from `fscrypt/foo` to
`github.com/google/fscrypt/foo` so that it can be built once we release
externaly. The documentation in README.md is updated accordingly.
Also, the README has a note noting that we do not make any guarantees
about project stability before 1.0 (when it ships with Ubuntu).
Change-Id: I6ba86e442c74057c8a06ba32a42e17f94833e280
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This commit changes the error handling for the actions package to use
the error handling library github.com/pkg/errors. This means replacing
"errors" with "github.com/pkg/errors", reworking some of the error
values, and wrapping some errors with additional context.
This commit also changes the Protector/Policy API, moving most of the
package functionality into Protector or Policy methods. These types are
now "locked" when they are queried from the filesystem, and Unlock()
must be used to get their corresponding keys. Note that only certain
operations will require unlocking the keys. Certain unnecessary
functions and methods are also removed.
This CL also fixes two bugs reported by Tyler Hicks in CreateConfigFile.
CPU time is used instead of wall time, and kiB is used instead of kB.
Change-Id: I88f45659e9fe4938d148843e3289e7b6d5b698d8
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This commit makes the callbacks for getting keys easier to understand.
Functions which need keys now take a KeyFunc callback. This callback
contains a ProtectorInfo parameter (basically a read-only version of
metadata.ProtectorData) and a boolean which indicates if the call is
being retried. The documentation is also updated to say which functions
will retry the KeyFunc.
For selecting a protector, there is now an OptionFunc callback which
takes a slice of ProtectorOptions. A ProtectorOption is a ProtectorInfo
along with additional information about a linked filesystem (if
applicable).
This commit also adds in methods for getting the protector options for a
specific filesystem or policy. It also adds a function for getting the
policy descriptor for a specific path.
Change-Id: I41e0d94ffd44e7166b0c5cf1b5d18437960bdf90
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This commit adds in the Policy structure. This structure represents an
unlocked policy key and its associated data. Policies can add or remove
Protectors, apply encryption policies to filesystem directories, and
provision a key into the kernel keyring.
Change-Id: I089710223221e0ea60188d523703469e5d67ad0e
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