oathtool

OATH one-time password tool.

Generate TOTP token (behaves like Google Authenticator):

oathtool --totp --base32 {{secret}}

Generate a TOTP token for a specific time:

oathtool --totp --now {{2004-02-29 16:21:42}} --base32 {{secret}}

Validate a TOTP token:

oathtool --totp --base32 {{secret}} {{token}}