Crate totp_rfc6238[][src]

Expand description

This library is for generating Time-based One-time Password (TOTP) codes/tokens, which is defined in RFC 6238.

Features of this crate:

  • Both low-level and high-level APIs are provided.
  • The length of the codes, the initial counter time (T0), update time interval (period) and hash algorithm are configurable.
  • HMAC algorithms are implemented by ring.
  • Read or write “Key Uri Format” (URIs start with otpauth://totp/) (the oathuri feature gate).
  • Read or write key from base32-encoded string (the oathuri feature gate).

Note: This implementation does NOT consider the time earlier than the Unix epoch (1970-01-01T00:00:00Z).

See high_level::TotpGenerator for an example.

Features that may be related to but not implemented in this crate:

  • Read or write QR codes.


pub use high_level::TotpGenerator;
pub use low_level::HashAlgorithm;



High-level APIs for TOTP code generation.


Low-level APIs for TOTP code generation.


Read or write URIs start with otpauth://totp/.