Directory Locker
Overview
Shared Directory Locker implements a streamlined encrypted file system designed for securely sharing encrypted files between users on a common file system.
The core idea: User A encrypts files in a shared directory; only User B, who holds the correct keys, can decrypt and access the data.
Use Case
User A wants to leave encrypted files for User B on a shared file system. Only User B can unlock and access these files using their private keys.
Usage
Compile
make all
Run
Generate Keys
Create a private and public key pair:
java keygen -s [subject] -d [directory] -f [filename]
[subject]: A keyword to authenticate when accessing the lock file[directory]: Directory path to save the keys[filename]: Base filename for the public and private key files
Lock a Directory
Encrypt and lock a directory for another user to unlock:
java lock -d [directory] -p [public key] -r [private key] -s [subject]
[directory]: Path to the directory to lock[public key]: Public key path of the user who will unlock the directory[private key]: Private key path of the locking user[subject]: Subject string embedded in the unlocker’s public key
Unlock a Directory
Decrypt and unlock a previously locked directory:
java unlock -d [directory] -p [public key] -r [private key] -s [subject]
[directory]: Path to the locked directory[public key]: Public key path of the locking user[private key]: Private key path of the unlocking user[subject]: Subject string embedded in the locking user’s public key