Add README.md

Also, run go fmt

README.md

@@ -0,0 +1,38 @@
+GoCryptFS
+=========
+A minimal encrypted overlay filesystem written in Go.
+
+Built on top of the
+native Go FUSE library [bazil.org/fuse](https://github.com/bazil/fuse)
+and the [ClueFS](https://github.com/airnandez/cluefs) loopback file system.
+
+Inspired by [EncFS](https://github.com/vgough/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](https://github.com/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

main.go

@@ -1,24 +1,23 @@
 package main
 
 import (
-	"path/filepath"
+	"bazil.org/fuse"
+	fusefs "bazil.org/fuse/fs"
 	"flag"
-	"os"
 	"fmt"
 	"github.com/rfjakob/gocryptfs/frontend"
-	"bazil.org/fuse"
-	fusefs "bazil.org/fuse/fs"
-
+	"os"
+	"path/filepath"
 )
 
 const (
 	PROGRAM_NAME = "gocryptfs"
-	USE_OPENSSL = true
+	USE_OPENSSL  = true
 
-	ERREXIT_USAGE = 1
-	ERREXIT_NEWFS = 2
-	ERREXIT_MOUNT = 3
-	ERREXIT_SERVE = 4
+	ERREXIT_USAGE  = 1
+	ERREXIT_NEWFS  = 2
+	ERREXIT_MOUNT  = 3
+	ERREXIT_SERVE  = 4
 	ERREXIT_MOUNT2 = 5
 )
 
@@ -48,7 +47,7 @@ func main() {
 		fuse.Subtype(PROGRAM_NAME),
 		fuse.VolumeName(PROGRAM_NAME),
 		fuse.LocalVolume(),
-		fuse.MaxReadahead(1024*1024),
+		fuse.MaxReadahead(1024 * 1024),
 	}
 	conn, err := fuse.Mount(mountpoint, mountOpts...)
 	if err != nil {

main_test.go

@@ -1,15 +1,15 @@
 package main
 
 import (
-	"io"
+	"crypto/md5"
+	"encoding/hex"
 	"fmt"
-	"time"
-	"testing"
+	"io"
+	"io/ioutil"
 	"os"
 	"os/exec"
-	"io/ioutil"
-	"crypto/md5"
-	"encoding/hex"
+	"testing"
+	"time"
 )
 
 const tmpDir = "test_tmp_dir/"
@@ -43,7 +43,6 @@ func TestMain(m *testing.M) {
 
 	r := m.Run()
 
-
 	fu.Run()
 	os.Exit(r)
 }