A Rust implementation the [HOTP] and [TOTP] Algorithms.
To use HOTP:
```rust use xotp::hotp::HOTP;
fn getotpwithhotp() { let secret = "secret"; let counter = 0; // Get a HOTP instance with a '&str' secret let hotpstr = HOTP::defaultfromutf8(secret); // Get an otp with the given counter let otpfromstr = hotpstr.getotp(counter); println!("The otp from hotpstr: {}", otpfrom_str);
// Alternatively, get a HOTP instance with a '&[u8]' secret
let hotp_bytes = HOTP::new(secret.as_bytes(), 6);
// Get an otp with the given counter
let otp_from_bytes = hotp_bytes.get_otp(counter);
println!("The otp from hotp_bytes: {}", otp_from_bytes);
} ```
To use TOTP:
```rust use xotp::totp::TOTP; use xotp::util::MacDigest; // Only needed if using a non-SHA1 hash function use std::time::{Duration, SystemTime, UNIX_EPOCH};
fn getotpwithtotp() { let secret = "secret"; let elapsedseconds = SystemTime::now() .durationsince(UNIXEPOCH) .expect("Error getting time") .assecs(); // Get a TOTP instance with an '&str' secret and default SHA1 Digest let totpsha1str = TOTP::defaultfromutf8(secret); // Get an otp with the given counter and elapsed seconds let otpsha1 = totpsha1str.getotp(elapsedseconds); println!("The otp from totpsha1str: {}", otp_sha1);
// Alternatively get a TOTP instance with an '&[u8]' secret
// and different digest (Sha256 or Sha512)
let totp_sha256_bytes = TOTP::new(
secret.as_bytes(),
MacDigest::SHA256, // SHA256 algorithm
8, // 8 digits
60 // 60-second interval
);
// Get an otp with the given counter, time and other custom params
let otp_sha256 = totp_sha256_bytes.get_otp_with_custom_time_start(
elapsed_seconds,
0, // Start time at unix epoch
);
println!("The otp from totp_sha256_bytes: {}", otp_sha256);
} ```
The changelog for this crate can be found at CHANGELOG.md
Please file any featre requests or bug reports through the [issue tracker]