macOS: modification and creation dates reset

[alexanderharm]

I started using gocryptfs (latest version) on macOS High Sierra and noticed that each time I eject my encrypted volume and remount it, that the creation and modification dates are reset to 1970-01-01. Is this expected behaviour?

I mount my dirs using

gocryptfs -ko local /path/to/encDir /Volumes/encDir

Also mounting them without the -ko local option has the same result.

[rfjakob]

Huh. What happens to the dates of the encrypted files?

[alexanderharm]

The date of the metadata file (?) is correct, the date of the data file is also reset.

[rfjakob]

When you write to a file, the encrypted file stays at 1970?

[alexanderharm]

For a very brief moment it shows the correct datetime but after max. one second it is reset.

[rfjakob]

Well, that's funny. I'll see if I can get my hands on a macos box next week to reproduce this.

I the meantime, can you run gocryptfs with

"-fg -nosyslog -fusedebug"

an see what happens when you modify a file?

[alexanderharm]

I don't see anything unusual but then I don't have a clue about this :-)
gocryptfs.log

[rfjakob]

Maybe found it. Can you try this build? gocryptfs.gz
gocryptfs v1.4.4-29-g996d2f1 without_openssl; go-fuse v20170619-32-g4ff4497; 2018-04-29 go1.10

[alexanderharm]

I tried and noticed the following:

• Mounted decrypted new file: creation date still 1970, modification date: fine

• Encrypted new file: both dates seem to look fine

• BUT: I cannot modify existing files anymore (see attached screenshot)

[rfjakob]

Ok, thanks for testing! So the problem is where I though it is, but the fix is causing other problems

[alexanderharm]

Well, thank you for all your efforts and prompt replies. Really appreciated!

[rfjakob]

Ok, I have that Mac box. And I can reproduce the save-existing-files problem: Happens in TextEdit as well, but does not seem to be related the fix. Also happens with older gocryptfs versions.

On the command line, writing files works fine, so it seems to be that the MacOS GUI file save functions seem to be unhappy about something.

[alexanderharm]

Did you use the Homebrew version? Because with the latest version from Homebrew I don't have any problem apart from the file dates, never had. So I cannot confirm that it also happens with older gocrypt versions, at least not on my systems.