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Re: Can NetBSD cgd be used for encrypted backup?



On 11.06.2017 16:22, Mayuresh wrote:
> I am coming from encfs/cryfs on Linux, which allow encryption at directory
> level. A user space mount shows the unencrypted contents, while the
> physical disk has encrypted contents, which can be easily backed up.
> 
> encfs on NetBSD seems broken and dated to me, while cryfs doesn't seem to
> be available (contrary to wikipedia page
> https://en.wikipedia.org/wiki/Comparison_of_disk_encryption_software#Operating_systems
> )
> 
> Have a few questions about cgd in this context:
> 
> - Can the native cgd of NetBSD be used for the purpose of encrypted
>   backup? Basically can I mount such filesystem in a way that it shows
>   encrypted files?
> 

I use cgd(4) devices for encrypted backup.

> - Can I use a virtual filesystem (loop device/vnode disk) with cgd?
> 

vnd(4) can be used.

> - Can I dynamically grow such virtual filesystem as the space requirement
>   grows?
> 

I've never tried growing, in theory this should work, if not directly
with userland tools than with external ones (like qemu disk format).

> Mayuresh
> 


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