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| author | Guilhem Moulin <guilhem@fripost.org> | 2014-01-23 02:18:40 +0100 |
|---|---|---|
| committer | Guilhem Moulin <guilhem@fripost.org> | 2015-06-07 04:27:57 +0200 |
| commit | ba40cbca9650e1ddaa8357c21b5de31cc376c481 (patch) | |
| tree | 292c6f88b870eee95d229c52a42b74655bc7ae2e /src/.gitignore | |
| parent | ef60bfefc79b00a41ca3a8e9388d3cf3ff46068e (diff) | |
Ensure urandom entropy is of cryptographic quality.
The non-blocking PRNG /dev/urandom doesn't block if it has been seeded
enough, sadly (e.g., if the entropy pool is empty). Reading a few bytes
from the *blocking* should ensure that "the kernel RNG has [...] reach
full entropy at least once, which guarantees cryptographic quality of
the rest of the /dev/urandom stream." -- Tor bug #10676
https://trac.torproject.org/projects/tor/ticket/10676
See also urandom(4).
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