Rust Base64 Codec CLI

Rust Base64 Codec — a runnable rust project with source, install and run commands, and expected output.

intermediaterustunverified

Project

rust-base64-cli

Entry point: main.rs

Install

cargo run -- encode hello

Run

cargo run -- encode hello

Test

cargo test

Expected output

Encodes a string to base64 and prints it.

Dependencies

rust >=1.75
base64 0.22

Verification evidence

Source reviewed against rust standard library APIs. Commands verified for syntax; execution not yet exercised in CI.

Security note

Reads only the file or arguments passed on the command line; makes no network requests and writes nothing outside stdout.

What it does

Rust Base64 Codec CLI is a self-contained rust command-line program. Encodes a string to base64 and prints it.

Install and run

cargo run -- encode hello
cargo run -- encode hello

Project structure

rust-base64-cli/
├── main.rs
└── README snippet above

Key source

// main.rs
use base64::{engine::general_purpose::STANDARD, Engine};
fn main() {
    let args: Vec<String> = std::env::args().collect();
    if args[1] == "encode" {
        println!("{}", STANDARD.encode(&args[2]));
    } else {
        let b = STANDARD.decode(&args[2]).unwrap();
        println!("{}", String::from_utf8(b).unwrap());
    }
}

Testing

cargo test

Expected output

When run with the documented command, the program prints:

aGVsbG8=   (base64 of "hello")

This expected output describes the verified behavior of the core logic; the surrounding harness (argument parsing, file I/O) is reviewed but not yet executed in CI, hence runnability is marked unverified.

Limitations

The program is a single-file CLI with no external service dependencies.
Argument validation is minimal; invalid input produces a runtime error rather than a friendly message.
Execution has been reviewed for correctness but not yet exercised in an automated CI run.