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GoCryptFS

A minimal encrypted overlay filesystem written in Go.

Built on top of the native Go FUSE library bazil.org/fuse and the ClueFS loopback file system.

Inspired by EncFS.

Design

Authenticated encryption of file contents using AES-GCM-128
96 bit nonce that starts from a random value and counts up
uses openssl through spacemonkeygo/openssl for a 3x speedup compared to crypto/cipher
AES-CBC filename encryption

Current Status

Work in progress
Key is set to static all-zero
Not ready for anything but testing and debugging

Testing

Run ./main_benchmark.bash to run the test suite and the streaming read/write benchmark.

The output should look like this:

$ ./main_benchmark.bash
+ go build
+ go test -bench=.
PASS
BenchmarkStreamWrite	     100	  14062281 ns/op	  74.57 MB/s
BenchmarkStreamRead	     100	  11267741 ns/op	  93.06 MB/s
ok  	github.com/rfjakob/gocryptfs	7.569s