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3 Commits

Author SHA1 Message Date
Maximilian
04f1e48564 Switch from unwrap() to expect() 2023-01-24 12:31:26 -06:00
Maximilian
10411bbdcb Avoid creating a new string every time by using a HashSet for disallowed characters 2023-01-24 12:26:18 -06:00
Maximilian
f832fda590 Cryptographically generate the password 2023-01-24 12:19:53 -06:00

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@ -1,5 +1,8 @@
use std::collections::HashSet;
use std::env;
use rand::RngCore;
fn main() {
// Take in two command line arguments, one i32 and one optional String
let args: Vec<String> = env::args().collect();
@ -18,15 +21,17 @@ fn main() {
// Disallowed_chars is an optional argument
let disallowed_chars: Option<&String> = args.get(2);
let mut allowed_chars: String = String::from("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-=`~!@#$%^&*()_+[]\\{}|;':,./<>?");
let allowed_chars: String = String::from("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-=`~!@#$%^&*()_+[]\\{}|;':,./<>?");
let mut allowed_chars_set: HashSet<char> = allowed_chars.chars().collect();
// Remove disallowed characters from allowed_characters if disallowed_chars is specified
if let Some(disallowed_chars) = disallowed_chars {
for disallowed_char in disallowed_chars.chars() {
allowed_chars = allowed_chars.replace(disallowed_char, "");
allowed_chars_set.remove(&disallowed_char);
}
if allowed_chars.len() == 0 { // Make sure there are still characters left to use
if allowed_chars_set.len() == 0 { // Make sure there are still characters left to use
println!("Error: You have disallowed all characters");
println!("The allowed character set includes: abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-=`~!@#$%^&*()_+[]\\{{}}|;':,./<>?");
return;
@ -34,13 +39,14 @@ fn main() {
}
if let Some(new_password_length) = new_password_length { // Unwrap Option in i32
let mut rng = rand::thread_rng();
// Generate a random string of length n
let mut new_password = String::new();
for _ in 0..new_password_length {
new_password.push(
allowed_chars.chars()
.nth(rand::random::<usize>() % allowed_chars.len())
.unwrap()
*allowed_chars_set.iter()
.nth(rng.next_u32() as usize % allowed_chars_set.len())
.expect("Error: Invalid index")
);
}