Python wrapper around lib1305 library, wrapper around the Poly1305 one-time authenticator.

Import library:

from lib1305 import poly1305

Authenticating a message:

a = poly1305.auth(m, k)

Verifying an authenticator:

poly1305.verify(a, m, k)

The poly1305.auth function generates an 128-bit authenticator 'a' given a message 'm' and a 256-bit secret key 'k'. "One-time" means that the secret key must not be reused to generate an authenticator of another message.

The poly1305.verify function verifies an 128-bit authenticator 'a' given a messagea 'm' and a 256-bit secret key 'k'. It raises an exception if the authenticator is not valid.