ykchalresp(1) General Commands Manual ykchalresp(1)NAME
ykchalresp - Perform challenge-response operation with YubiKey
ykchalresp [-1 | -2] [-H] [-Y] [-N] [-x] [-v] [-h]
Send a challenge to a YubiKey, and read the response. The YubiKey can be configured with two different C/R modes -- the standard one is a
160 bits HMAC-SHA1, and the other is a YubiKey OTP mimicing mode, meaning two subsequent calls with the same challenge will result in dif-
-1 send the challenge to slot 1. This is the default.
-2 send the challenge to slot 2.
-H send a 64 byte HMAC challenge. This is the default.
-Y send a 6 byte Yubico OTP challenge.
-N non-blocking mode -- abort if the YubiKey is configured to require a key press before sending the response.
-x challenge is hex encoded.
-v enable verbose mode.
The YubiKey challenge-response operation can be demonstrated using the NIST PUB 198 A.2 test vector.
First, program a YubiKey with the test vector :
$ ykpersonalize -2 -ochal-resp -ochal-hmac -ohmac-lt64 -a 303132333435363738393a3b3c3d3e3f40414243
Commit? (y/n) [n]: y
Now, send the NIST test challenge to the YubiKey and verify the result matches the expected :
$ ykchalresp -2 'Sample #2'
Report ykchalresp bugs in the issue tracker <https://github.com/Yubico/yubikey-personalization/issues>
The ykpersonalize home page <http://code.google.com/p/yubikey-personalization/>
YubiKeys can be obtained from Yubico <http://www.yubico.com/>.
yubikey-personalization Febuary 2011 ykchalresp(1)
Check Out this Related Man Page
yhsm-yubikey-ksm(1) General Commands Manual yhsm-yubikey-ksm(1)NAME
yhsm-yubikey-ksm - Decrypt YubiKey OTPs using an attached YubiHSM
yhsm-yubikey-ksm --key-handles ... [options]
This is a small network server with a REST-like API that decodes YubiKey OTPs.
It can be used as a decryption backend (Key Storage Module) to a validation service such as the YubiCloud.
The AES keys of the YubiKeys must be present as AEAD files decryptable to the attached YubiHSM. Such AEADs can for example be created using
Note that this daemon is single threaded - it will only handle a single request at once. A request timeout is therefor most important.
OPTIONS -D, --device
device file name (default: /dev/ttyACM0)
enable verbose operation
enable debug printout, including all data sent to/from YubiHSM
--U, --serve-url base
base of URL for decrypt web service (default: /yhsm/validate?)
port to listen on (default: 8002)
address to bind to (default: 127.0.0.1)
--key-handles kh, --key-handle kh
key handles to use for decoding OTPs. Examples : "1", "0xabcd".
--aead-dir dir, -B dir
base directory for AEADs (default: /var/cache/yubikey-ksm/aeads)
number of seconds before a request times out (default: 5)
write process id of server to this file
Report python-pyhsm/yhsm-yubikey-ksm bugs in the issue tracker <https://github.com/Yubico/python-pyhsm/issues/>
The python-yubico home page <https://github.com/Yubico/python-pyhsm/>
YubiHSMs can be obtained from Yubico <http://www.yubico.com/>.
python-pyhsm December 2011 yhsm-yubikey-ksm(1)
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