Implement ability to create new git identities

[vepr-ua]

This tool should have a new feature to allow the creation of identities while also supporting signing commits with GPG or SSH.

Reference Article for creating git identities Setting Up Git Identities

[vepr-ua]

We can probably use ssh-key and sequoia-openpgp crate to generate these certs

use ssh_key::{Algorithm, LineEnding, PrivateKey};
use rand::rngs::OsRng;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Generate Ed25519 (recommended) or RSA
    let private_key = PrivateKey::random(&mut OsRng, Algorithm::Ed25519)?;
    let public_key = private_key.public_key();

    // Export in OpenSSH format
    let private_openssh = private_key.to_openssh(LineEnding::LF)?;
    let public_openssh = public_key.to_openssh()?;

    // For RSA if needed
    let rsa_key = PrivateKey::random(&mut OsRng, Algorithm::Rsa { bits: 4096 })?;

    Ok(())
}

use sequoia_openpgp as openpgp;
use openpgp::cert::prelude::*;
use openpgp::serialize::Serialize;

fn main() -> openpgp::Result<()> {
    let (cert, revocation) = CertBuilder::new()
        .add_userid("User <user@example.com>")
        .add_signing_subkey()
        .add_transport_encryption_subkey()
        .generate()?;

    // Export armored public key
    let mut public_armor = Vec::new();
    cert.armored().serialize(&mut public_armor)?;

    // Export secret key
    let mut secret_armor = Vec::new();
    cert.as_tsk().armored().serialize(&mut secret_armor)?;

    Ok(())
}

[dependencies]
ssh-key = { version = "0.6", features = ["ed25519", "rsa", "encryption"] }
sequoia-openpgp = "2.1.0"
rand = "0.8"