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YubiCloud One-Time-Password Validation Client




Validate the YUBIKEYOTP one-time-password against the YubiCloud using CLIENTID as the client identifier.

Mandatory arguments to long options are mandatory for short options too.


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--url URL

Validation service URL, for example, "http://api.yubico.com/wsapi/verify"

--ca CADIR

Path to directory containing Certificate Authoritity, e.g., "/usr/local/etc/CERTS"

--cai CAFILE

Path to a file holding one or more certificated to verify the peer with

--apikey Key

API key for HMAC validation of request/response

--proxy ip:port

Connect to validation service through a proxy, e.g., "socks5h://user:pass@"

Exit status is 0 on success, 1 if there is a hard failure, 2 if the OTP was replayed, 3 for other soft OTP-related failures.

Reporting Bugs

Report bugs at <https://github.com/Yubico/yubico-c-client>.


January 2024 ykclient 2.15