oathtool

OATH one-time password tool. More information: https://www.nongnu.org/oath-toolkit/oathtool.1.html.

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}}"

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