Use Go modules, improve stability and documentation

A special thanks to @ebiggers for most of the changes in this release.

With the release of 1.13 recently, the minimum supported version of Go for fscrypt is now 1.12.

With #107, fscrypt now uses go modules (and no longer uses dep).

New Features:

• #119: Adiantum support
• #145: Display encryption options in fscyrpt status DIR

Changes to improve stability of fscrypt:

• #140: Makes sure fscrypt file update are always atomic
• #134: Use sane defaults for newly encrypted directories
• #122: Install PAM modules/configs correctly

The remaining changes include numerous fixes to the Documentation and CI.

Bug and Security Fixes

This release contains multiple bug fixes. See the corresponding PRs:

• #96
• #97
• #102
• #103

PR #103 also fixes CVE-2018-6558, which allowed for privilege escalation. Please update fscrypt as soon as possible. Debian and Ubuntu update should be available soon.

Improved Compatibility and Easier Builds

This small release makes fscrypt much easier to build and use.

• PasswordHash has completely moved to x/crypto/argon2, eliminating the libargon2 build and runtime dependancy. Now the dependancies to build fscrypt are go, make, gcc, and some system headers. That's it! (#84)
• PasswordHash will only use at most 128MiB. This allows users to encrypt files on removable media and rest assured that it will still work when plugged into another system with less memory. (#74)
• fscrypt's build and CI systems have been greatly improved. All dependancies are now vendored with dep allowing for reproducible builds. Building, testing, and changing fscrypt is now much more straightforward. (#83, #85, #86, #88, #89, #90)
• Other minor fixes (#70, #75, #87)

Improve Purging and Add Algorithms

This release improves the process of purging keyrings by:

• Fixing #57 where keys would not be cleared on logout if the session keyring was misconfigured.
• Adding #67 to always sync the filesystem metadata when purging keys.

Minor features include:

• Adding cryptographic algorithms from the 4.13 kernel (#64)
• Improving our Travis CI processes (#68, #69)

Features coming in 0.3:

• Major Documentation rewrite (#10)
• Commands to automatically handle ext4 feature flags
• UI refactoring

PAM and Keyrings Stabilization

See the Pull Requests and Closed Issues for more detailed information.

• The PAM module now works without crashing the login process
• Keys work properly when switching between root and non-root users
• Finalized how the keys will be provisioned into the kernel keyring

Initial PAM Module Release

This release introduces the PAM Module and associated documentation.

It also includes numerous bug fixes.

Initial Public Release

This is the version of fscrypt which was first made public on Github.

The redacted commit history from internal development is maintained.