Assignment Detail

Assignment ID: FG133288225

CSE 3320 Operating Systems – University of Texas at Arlington

Networking and Security

Description:

You will create a very minimal “Dropbox/Sugarsync/GoogleDrive/MS/Apple…”-like system to securely store and share files “in the cloud” (really on a remote server). Users will select unencrypted (plain) files (of any type) from a menu.

Then that file will be encrypted and then sent to a server (service).

Users will be able to selectively, or as a group, retrieve (and decrypt) those files later.
You should provide both the client side and server side of your implementation.

Hint:
C clients may look like this:
sockfd = socket(AF_INET, SOCK_STREAM, 0); address.sin_family = AF_INET; address.sin_addr.s_addr = inet_addr(“127.0.0.1”); address.sin_port = htons(9734);
len = sizeof(address);
result = connect(sockfd, (struct sockaddr *)&address, len); write(sockfd, &ch, 1);
read(sockfd, &ch, 1);
printf(“char from server = %c\n”, ch); close(sockfd);
exit(0);
And servers like this:
server_sockfd = socket(AF_INET, SOCK_STREAM, 0); server_address.sin_family = AF_INET; server_address.sin_addr.s_addr = htonl(INADDR_ANY); server_address.sin_port = htons(9734);
server_len = sizeof(server_address);
bind(server_sockfd, (struct sockaddr *)&server_address, server_len); listen(server_sockfd, 5);
while(1) {
printf(“server waiting\n”); client_sockfd = accept(server_sockfd,
(struct sockaddr *)&client_address, &client_len); read(client_sockfd, &ch, 1);
write(client_sockfd, &ch, 1); close(client_sockfd);

More Hints:
In Python, there are several libraries (depends on Python version you use.) There are encrypt/decrypt libraries for all languages (AES, DES, etc) Consider using “websockets”, Java, Python or PHP
Bonus: Use a public server (AWS, Google, etc) for hosting, browser (client) interface,
Authentication (user,pwd), Certificates, Digital Signing, quotas

Attachment:- Operating Systems.rar