maxk77 / Mini-Encrypted-File-System

CMPT-785-miniEFS

About the program

Two types of user: 1 Admin and N users.

User features

• cd <directory>   -  The user will provide the directory to move to. It should accept `.` and `..` as current and parent directories respectively and support changing multiple directories at once (cd ../../dir1/dir2). cd / should take you to the current user’s root directory. If a directory doesn't exist, the user should stay in the current directory.
• pwd   - Print the current directory. Each user should have /personal and /shared base directories. 
• ls   -  List the files and directories in the current directory separated by a new line. You need to show the directories `.` and `..` as well. To differentiate between a file and a directory, the output should look as follows
  d -> .
  d -> ..
  d -> directory1
  f -> file1
• cat <filename>   - Read the actual (decrypted) contents of the file. If the file doesn't exist, print " doesn't exist"
• share <filename> <username>   -  Share the file with the target user which should appear under the `/shared` directory of the target user. The files are shared only with read permission. The shared directory must be read-only. If the file doesn't exist, print "File doesn't exist". If the user doesn't exist, print "User doesn't exist". First check will be on the file.
• mkdir <directory\_name>   - Create a new directory. If a directory with this name exists, print "Directory already exists"
• mkfile <filename> <contents>   - Create a new file with the contents. The contents will be printable ascii characters. If a file with exists, it should replace the contents. If the file was previously shared, the target user should see the new contents of the file.
• exit   - Terminate the program.

Admin has all user features except for these 2 - mkfile and mkdir.

Admin specific features

• Admin should have access to read all user files
• adduser <username>  - This command should create a keyfile called username_keyfile on the host which will be used by the user to access the filesystem. If a user with this name already exists, print "User already exists"

How to compile and execute the program

The environment we use is Linux. Tested on Ubuntu and Kali.

Except for openssl, please also make sure jsoncpp is installed before you compile the code

sudo apt install libjsoncpp-dev

Compile and prepare the binary:

cd /your-path-to/CMPT-785-miniEFS

g++ main.cpp -o fileserver -lcrypto -ljsoncpp

chmod +x fileserver

Run the fileserver binary:

./fileserver key_name