NAME¶
yhsm-linux-add-entropy ‐ Seed the Linux entropy pool with data from
YubiHSM TRNG
SYNOPSIS¶
yhsm-linux-add-entropy [
options]
DESCRIPTION¶
The YubiHSM uses "Avalanche Noise" TRNG together with USB SOF jitter
sampling to feed a DRBG_CTR algorithm (NIST publication SP800-90). The result
has been verified as being random data of good quality by at least one third
party cryptographer.
⟨URL:
http://sartryck.idg.se/Art/Yubihsm_1_TW072011.html ⟩
Use this program to add random data from the YubiHSM to the entropy pool of your
Linux operating system. This is useful whenever lots of random data is needed,
such as when generating chryptographic keys (GPG-keys), on a server
terminating SSL sessions etc.
You may run this script from cron, or in a while-loop. Make sure it does not run
at the same time as something else accessing the YubiHSM though, or the two
tasks may interrupt each other ‐ probably making both fail.
OPTIONS¶
- -D, --device
- device file name (default: /dev/ttyACM0).
- -v, --verbose
- enable verbose operation.
- -c, --count
- number of iterations to run (default: 100).
- -r, --ratio
- bits per byte read to use. 8 is probably fine, but as a
conservative default 2 is used.
- --debug
- enable debug printout, including all data sent to/from
YubiHSM.
EXIT STATUS¶
- 0
- Entropy added successfully
- 1
- Failure
BUGS¶
Report python-pyhsm/yhsm-linux-add-entropy bugs in the issue tracker
⟨URL:
https://github.com/Yubico/python-pyhsm/issues/ ⟩
SEE ALSO¶
The python-pyhsm home page ⟨URL:
https://github.com/Yubico/python-pyhsm/
⟩
YubiHSMs can be obtained from Yubico ⟨URL:
http://www.yubico.com/
⟩.
