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A Cloud Guru

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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Path Info

Level

Intermediate

Duration

15m

Published

Jan 31, 2020

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

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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