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-rw-r--r--internal/configfile/config_file.go45
-rw-r--r--internal/configfile/config_test.go23
-rw-r--r--internal/configfile/feature_flags.go41
3 files changed, 62 insertions, 47 deletions
diff --git a/internal/configfile/config_file.go b/internal/configfile/config_file.go
index d91ce3e..6ed49d9 100644
--- a/internal/configfile/config_file.go
+++ b/internal/configfile/config_file.go
@@ -4,7 +4,6 @@ import (
"encoding/json"
"fmt"
"io/ioutil"
- "log"
"github.com/rfjakob/gocryptfs/internal/contentenc"
"github.com/rfjakob/gocryptfs/internal/cryptocore"
@@ -55,13 +54,13 @@ func CreateConfFile(filename string, password string, plaintextNames bool, logN
cf.EncryptKey(key, password, logN)
// Set feature flags
- cf.FeatureFlags = append(cf.FeatureFlags, FlagGCMIV128)
+ cf.FeatureFlags = append(cf.FeatureFlags, knownFlags[FlagGCMIV128])
if plaintextNames {
- cf.FeatureFlags = append(cf.FeatureFlags, FlagPlaintextNames)
+ cf.FeatureFlags = append(cf.FeatureFlags, knownFlags[FlagPlaintextNames])
} else {
- cf.FeatureFlags = append(cf.FeatureFlags, FlagDirIV)
- cf.FeatureFlags = append(cf.FeatureFlags, FlagEMENames)
- cf.FeatureFlags = append(cf.FeatureFlags, FlagLongNames)
+ cf.FeatureFlags = append(cf.FeatureFlags, knownFlags[FlagDirIV])
+ cf.FeatureFlags = append(cf.FeatureFlags, knownFlags[FlagEMENames])
+ cf.FeatureFlags = append(cf.FeatureFlags, knownFlags[FlagLongNames])
}
// Write file to disk
@@ -166,37 +165,3 @@ func (cf *ConfFile) WriteFile() error {
return nil
}
-
-const (
- // Understood Feature Flags.
- // Also teach isFeatureFlagKnown() about any additions and
- // add it to CreateConfFile() if you want to have it enabled by default.
- FlagPlaintextNames = "PlaintextNames"
- FlagDirIV = "DirIV"
- FlagEMENames = "EMENames"
- FlagGCMIV128 = "GCMIV128"
- FlagLongNames = "LongNames"
-)
-
-// Verify that we understand a feature flag
-func (cf *ConfFile) isFeatureFlagKnown(flag string) bool {
- switch flag {
- case FlagPlaintextNames, FlagDirIV, FlagEMENames, FlagGCMIV128, FlagLongNames:
- return true
- default:
- return false
- }
-}
-
-// isFeatureFlagSet - is the feature flag "flagWant" enabled?
-func (cf *ConfFile) IsFeatureFlagSet(flagWant string) bool {
- if !cf.isFeatureFlagKnown(flagWant) {
- log.Panicf("BUG: Tried to use unsupported feature flag %s", flagWant)
- }
- for _, flag := range cf.FeatureFlags {
- if flag == flagWant {
- return true
- }
- }
- return false
-}
diff --git a/internal/configfile/config_test.go b/internal/configfile/config_test.go
index c83c4bd..d0540c3 100644
--- a/internal/configfile/config_test.go
+++ b/internal/configfile/config_test.go
@@ -72,14 +72,23 @@ func TestCreateConfFile(t *testing.T) {
}
func TestIsFeatureFlagKnown(t *testing.T) {
- var cf ConfFile
- if !cf.isFeatureFlagKnown(FlagDirIV) {
- t.Errorf("This flag should be known")
+ // Test a few hardcoded values
+ testKnownFlags := []string{"DirIV", "PlaintextNames", "EMENames", "GCMIV128", "LongNames"}
+ // And also everything in knownFlags (yes, it is likely that we end up with
+ // some duplicates. Does not matter.)
+ for _, f := range knownFlags {
+ testKnownFlags = append(testKnownFlags, f)
}
- if !cf.isFeatureFlagKnown(FlagPlaintextNames) {
- t.Errorf("This flag should be known")
+
+ var cf ConfFile
+ for _, f := range testKnownFlags {
+ if !cf.isFeatureFlagKnown(f) {
+ t.Errorf("flag %q should be known", f)
+ }
}
- if cf.isFeatureFlagKnown("StrangeFeatureFlag") {
- t.Errorf("This flag should be NOT known")
+
+ f := "StrangeFeatureFlag"
+ if cf.isFeatureFlagKnown(f) {
+ t.Errorf("flag %q should be NOT known", f)
}
}
diff --git a/internal/configfile/feature_flags.go b/internal/configfile/feature_flags.go
new file mode 100644
index 0000000..d439363
--- /dev/null
+++ b/internal/configfile/feature_flags.go
@@ -0,0 +1,41 @@
+package configfile
+
+type flagIota int
+
+const (
+ FlagPlaintextNames flagIota = iota
+ FlagDirIV
+ FlagEMENames
+ FlagGCMIV128
+ FlagLongNames
+)
+
+// knownFlags stores the known feature flags and their string representation
+var knownFlags map[flagIota]string = map[flagIota]string{
+ FlagPlaintextNames: "PlaintextNames",
+ FlagDirIV: "DirIV",
+ FlagEMENames: "EMENames",
+ FlagGCMIV128: "GCMIV128",
+ FlagLongNames: "LongNames",
+}
+
+// isFeatureFlagKnown verifies that we understand a feature flag
+func (cf *ConfFile) isFeatureFlagKnown(flag string) bool {
+ for _, knownFlag := range knownFlags {
+ if knownFlag == flag {
+ return true
+ }
+ }
+ return false
+}
+
+// isFeatureFlagSet - is the feature flag "flagWant" enabled?
+func (cf *ConfFile) IsFeatureFlagSet(flagWant flagIota) bool {
+ flagString := knownFlags[flagWant]
+ for _, flag := range cf.FeatureFlags {
+ if flag == flagString {
+ return true
+ }
+ }
+ return false
+}