Feature/userauth

[gjrtimmer]

Issue(s)

• Add sqlite3 provided userauth module? #513

ADDED

• User Authentication Implementation
• Rewrite Upgrade tool
• Rename file to conform to fileformat sqlite3_*_omit.go
• Updated sqlite3-binding.* with new upgrade tool
• Add: callbackRetNil required for error type return because of adding RegisterFuncs directly on the connection. (This requires review)
• Add: TestCreateAuthDatabase

Upgrade Tool

The upgrade tool can now be build with build tag upgrade, CGO must be disabled.

CGO_ENABLED=0 go build -tags upgrade .

TODO

• Implement Table Exists call to check if the sqlite_user table exists, and only run the creation when the table does not exists.
• Documentation

Nice to Have

• Override implementation of sqlite_crypt with stronger encryption for password.
• Provide multiple password encoders so the user can simple use a ConnectHook to select which encoder must be used for the password encoder.

Tests

The test(s) can be run with the following command:

go test -v -tags sqlite_userauth -run sqlite3_opt_userauth_test.go

• Create Auth Database
• Failed Authentication
• Add User
• Delete User
• Change Password
• ...

---

@mattn I really need your help with the Table Exists I do not know how to do this correctly, we have to do an sql query directly on the sqlite3_ bindings without the golang sql driver. You probably know how to do this and will probably be peanuts for you.

See Sqlite3.go Lines: 1371 - 1377

[ci skip]