Lib.rs

This package is a library designed to provide out-of-box HOTP and TOTP clients to generate one-time passwords.

HOTP

work with base32 secret string:

use otps::HotpBuilder;

let mut hotp_client = HotpBuilder::new()
  .base32_secret("GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ")
  .build()
  .expect("failed to initialize HOTP client");

assert_eq!(hotp_client.generate(), "755224");

hotp_client.increment_counter();
assert_eq!(hotp_client.generate(), "287082");

If secret string isn't base32 encoding, you should use .key(secret_string.as_bytes().to_owned()) instead of .base32_secret method.

TOTP

work with base32 secret string:

use otps::TotpBuilder;
let mut totp_cleint = TotpBuilder::new()
  .base32_secret("GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ")
  .build()
  .expect("failed to initialize TOTP client");
let totp_code = totp_cleint.generate();
println!("TOTP: {}", totp_code);

If secret string isn't base32 encoding, you should use .key(secret_string.as_bytes().to_owned()) instead of .base32_secret method.