gocryptfs-xray: add -0 flag, add tests

The -0 flags works like xargs -0.

gocryptfs-xray/paths_ctlsock.go

@@ -8,36 +8,55 @@ import (
 	"github.com/rfjakob/gocryptfs/ctlsock"
 )
 
-func decryptPaths(socketPath string) {
+func decryptPaths(socketPath string, sep0 bool) {
 	var req ctlsock.RequestStruct
-	transformPaths(socketPath, &req, &req.DecryptPath)
+	transformPaths(socketPath, &req, &req.DecryptPath, sep0)
 }
 
-func encryptPaths(socketPath string) {
+func encryptPaths(socketPath string, sep0 bool) {
 	var req ctlsock.RequestStruct
-	transformPaths(socketPath, &req, &req.EncryptPath)
+	transformPaths(socketPath, &req, &req.EncryptPath, sep0)
 }
 
-func transformPaths(socketPath string, req *ctlsock.RequestStruct, in *string) {
+func transformPaths(socketPath string, req *ctlsock.RequestStruct, in *string, sep0 bool) {
+	errorCount := 0
 	c, err := ctlsock.New(socketPath)
 	if err != nil {
 		fmt.Printf("fatal: %v\n", err)
 		os.Exit(1)
 	}
-	line := 0
-	scanner := bufio.NewScanner(os.Stdin)
-	for scanner.Scan() {
-		line++
-		*in = scanner.Text()
+	line := 1
+	var separator byte = '\n'
+	if sep0 {
+		separator = '\000'
+	}
+	r := bufio.NewReader(os.Stdin)
+	for eof := false; eof == false; line++ {
+		val, err := r.ReadBytes(separator)
+		if len(val) == 0 {
+			break
+		}
+		if err != nil {
+			// break the loop after we have processed the last val
+			eof = true
+		} else {
+			// drop trailing separator
+			val = val[:len(val)-1]
+		}
+		*in = string(val)
 		resp, err := c.Query(req)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "error at input line %d %q: %v\n", line, *in, err)
+			errorCount++
 			continue
 		}
 		if resp.WarnText != "" {
 			fmt.Fprintf(os.Stderr, "warning at input line %d %q: %v\n", line, *in, resp.WarnText)
 		}
-		fmt.Println(resp.Result)
+		fmt.Printf("%s%c", resp.Result, separator)
 	}
-	os.Exit(0)
+	if errorCount == 0 {
+		os.Exit(0)
+	}
+	os.Exit(1)
 }

gocryptfs-xray/xray_main.go

@@ -65,10 +65,12 @@ func main() {
 		decryptPaths  *bool
 		encryptPaths  *bool
 		aessiv        *bool
+		sep0          *bool
 	}
 	args.dumpmasterkey = flag.Bool("dumpmasterkey", false, "Decrypt and dump the master key")
 	args.decryptPaths = flag.Bool("decrypt-paths", false, "Decrypt file paths using gocryptfs control socket")
 	args.encryptPaths = flag.Bool("encrypt-paths", false, "Encrypt file paths using gocryptfs control socket")
+	args.sep0 = flag.Bool("0", false, "Use \\0 instead of \\n as separator")
 	args.aessiv = flag.Bool("aessiv", false, "Assume AES-SIV mode instead of AES-GCM")
 	flag.Usage = usage
 	flag.Parse()
@@ -83,10 +85,10 @@ func main() {
 	}
 	fn := flag.Arg(0)
 	if *args.decryptPaths {
-		decryptPaths(fn)
+		decryptPaths(fn, *args.sep0)
 	}
 	if *args.encryptPaths {
-		encryptPaths(fn)
+		encryptPaths(fn, *args.sep0)
 	}
 	fd, err := os.Open(fn)
 	if err != nil {

gocryptfs-xray/xray_tests/xray_test.go

@@ -6,6 +6,8 @@ import (
 	"io/ioutil"
 	"os/exec"
 	"testing"
+
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
 )
 
 func TestAesgcmXray(t *testing.T) {
@@ -58,3 +60,51 @@ func TestDumpmasterkey(t *testing.T) {
 		fmt.Printf("have: %s\n", out)
 	}
 }
+
+func TestEncryptPaths(t *testing.T) {
+	cDir := test_helpers.InitFS(t)
+	pDir := cDir + ".mnt"
+	sock := cDir + ".sock"
+	test_helpers.MountOrFatal(t, cDir, pDir, "-ctlsock="+sock, "-extpass", "echo test")
+	defer test_helpers.UnmountPanic(pDir)
+
+	testCases := []struct {
+		in   []string
+		sep0 bool
+	}{
+		{
+			[]string{
+				"test1",
+				"test1\n",
+				"test1\ntest2",
+				"test1\ntest2\n",
+			},
+			false,
+		},
+		{
+			[]string{
+				"test1",
+				"test1\000",
+				"test1\000test2",
+				"test1\000test2\000",
+			},
+			true,
+		},
+	}
+
+	for _, tc := range testCases {
+		for _, in := range tc.in {
+			sepArg := "-0=false"
+			if tc.sep0 {
+				sepArg = "-0=true"
+			}
+			cmd := exec.Command("../gocryptfs-xray", "-encrypt-paths", sepArg, sock)
+			cmd.Stdin = bytes.NewBuffer([]byte(in))
+			out, err := cmd.CombinedOutput()
+			t.Logf("%q", string(out))
+			if err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+}

tests/test_helpers/helpers.go

@@ -26,7 +26,7 @@ var testParentDir = ""
 const GocryptfsBinary = "../../gocryptfs"
 
 // UnmountScript is the fusermount/umount compatibility wrapper script
-const UnmountScript = "../fuse-unmount.bash"
+const UnmountScript = "../../tests/fuse-unmount.bash"
 
 // X255 contains 255 uppercase "X". This can be used as a maximum-length filename.
 var X255 string