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