Function encrypt

tests/binary/rsa/src/main.rs:65–67

RSA encryption: c = m^e mod n

(pub_key: &PublicKey, message: u64)

// RSA encryption: c = m^e mod n
fn encrypt(pub_key: &PublicKey, message: u64) -> u64 {
    mod_exp(message, pub_key.e, pub_key.n)
}

// RSA decryption: m = c^d mod n
fn decrypt(priv_key: &PrivateKey, ciphertext: u64) -> u64 {