From d583bdb79e6f05bce2451a7e220e553209da4c1d Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Thu, 21 Oct 2021 09:58:37 +0200
Subject: configfile: add LongNameMax support

Feature flag + numeric paramater

https://github.com/rfjakob/gocryptfs/issues/499
---
 internal/configfile/config_file.go | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'internal/configfile/config_file.go')

diff --git a/internal/configfile/config_file.go b/internal/configfile/config_file.go
index 828f034..2d11346 100644
--- a/internal/configfile/config_file.go
+++ b/internal/configfile/config_file.go
@@ -55,6 +55,8 @@ type ConfFile struct {
 	FeatureFlags []string
 	// FIDO2 parameters
 	FIDO2 *FIDO2Params `json:",omitempty"`
+	// LongNameMax corresponds to the -longnamemax flag
+	LongNameMax uint8 `json:",omitempty"`
 	// Filename is the name of the config file. Not exported to JSON.
 	filename string
 }
@@ -71,6 +73,7 @@ type CreateArgs struct {
 	Fido2HmacSalt      []byte
 	DeterministicNames bool
 	XChaCha20Poly1305  bool
+	LongNameMax        uint8
 }
 
 // Create - create a new config with a random key encrypted with
@@ -97,6 +100,12 @@ func Create(args *CreateArgs) error {
 		if !args.DeterministicNames {
 			cf.setFeatureFlag(FlagDirIV)
 		}
+		// 0 means to *use* the default (which means we don't have to save it), and
+		// 255 *is* the default, which means we don't have to save it either.
+		if args.LongNameMax != 0 && args.LongNameMax != 255 {
+			cf.LongNameMax = args.LongNameMax
+			cf.setFeatureFlag(FlagLongNameMax)
+		}
 		cf.setFeatureFlag(FlagEMENames)
 		cf.setFeatureFlag(FlagLongNames)
 		cf.setFeatureFlag(FlagRaw64)
-- 
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