Fix This Broken Stacked Encrypted Linux Filesystem

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Fix This Broken Stacked Encrypted Linux Filesystem

In this activity you will resolve an issue that prevents the creation of an encrypted filesystem using eCryptfs. You are working as a Systems Administrator and have been tasked with creating an encrypted filesystem using eCryptFS. However, when you attempt to mount the filesystem you receive the following error: ``` ...unknown filesystem type 'ecryptfs'. ``` Resolve this error and mount the filesystem.

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Lab Info

Level

Intermediate

Last updated

Apr 06, 2025

Duration

15m

Challenge

Identify the Issue and Resolve It
Is the kernel module installed? Check with this:
```
lsmod | grep ecryptfs
```
If not, load it:
```
modprobe ecryptfs
```
Challenge

Create the Cipher Directory and Mount Point
Create the cipher directory to hold encrypted data:
```
mkdir secret-enc
```
Create the mount point to access unencrypted data:
```
mkdir secret
```
Challenge

Add Your Passphrase to the Kernel Keyring
```
ecryptfs-add-passphrase
export KSIG=
```

Challenge

Mount the Encrypted Filesystem

Substitute the key signature from the ecryptfs-add-passphrase command:

echo $KSIG
sudo mount -i -t ecryptfs secret-enc/ secret/ -o ecryptfs_sig=$KSIG,ecryptfs_fnek_sig=$KSIG,ecryptfs_cipher=aes,ecryptfs_key_bytes=32,ecryptfs_unlink_sigs

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