BiBiFi - CMPT785

The encrypted file system will reside on the host file system as a regular file system but with more security. This file system is being used by multiple clients/users since we can't afford to have different storage for each of our users and want to optimally use all of the available storage.

Compile

Docker (preferred):

Build image (dynamic)

docker build -t fileserver -f dockerfile

Build image (static)

docker build -t fileserver -f dockerfile-static

Run container

docker run --rm -it <image> bash

Unix:

Dynamic binary

NOTE - install devel package for openssl first based on your distro - openssl-devel(rpm), libssl-dev(deb)

g++ -std=c++17 main.cpp -o fileserver -lssl -lcrypto

Static binary

g++ -std=c++17 main.cpp -o fileserver -static -lssl -lcrypto -ldl -Wl,--whole-archive -lpthread -Wl,--no-whole-archive -static-libgcc

User Features

• cd <directory> - The user provides the directory to move to. It accepts . and .. as current and parent directories respectively and support changing multiple directories at once (cd ../../dir1/dir2). cd / takes you to the current user’s root directory. If a directory doesn't exist, the user stays in the current directory.
• pwd - Print the current directory. Each user has /personal and /shared base directories.
• ls - Lists the files and directories in the current directory separated by a new line. Shows the directories . and .. as well. To differentiate between a file and a directory, the output look as follows:
  • d -> .
  • d -> ..
  • d -> directory1
  • f -> file1
• cat <filename> - Reads the actual (decrypted) contents of the file. If the file doesn't exist, it prints " doesn't exist"
• share <filename> <username> - Shares the file with the target user which appears under the /shared directory of the target user. The files are shared only with read permission. The shared directory is read-only. If the file doesn't exist, it prints "File doesn't exist". If the user doesn't exist, it prints "User doesn't exist".
• mkdir <directory_name> - Creates a new directory. If a directory with this name exists, it prints "Directory already exists"
• mkfile <filename> <contents> - Creates a new file with the contents. The contents are printable ascii characters. If a file with exists, it replaces the contents. If the file was previously shared, the target user will see the new contents of the file.
• exit - Terminates the program.

Admin Features

• Admin has access to read the entire file system with all user features
• adduser <username> - This command creates a keyfile called username_keyfile on the host which is used by the user to access the filesystem. If a user with this name already exists, it prints "User already exists"

Contributing

Fork it (https://github.com/Madhvik-P/CMPT785-BiBiFi)
Create your feature branch (git checkout -b feature/fooBar)
Commit your changes (git commit -am 'Add some fooBar')
Push to the branch (git push origin feature/fooBar)
Create a new Pull Request