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Merge #10855: random: only use getentropy on openbsd

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077d01f random: only use getentropy on openbsd (Cory Fields)

Pull request description:

  Follow-up from #10335. I can confirm that this fixes my issue when building against a new glibc + old linux headers for back-compat.

Tree-SHA512: a0fcf26995fbd3636f970e729a172c6e1d7c0de371e703f0653cd9776600f438ec43acd2b1eb92f2678a011968da8fbbeef8a54599434851f4c6ffe78291c172
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Wladimir J. van der Laan 2017-07-18 08:24:40 +02:00 committed by Pasta
parent 644274fded
commit cea9e1cf01
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1 changed files with 3 additions and 1 deletions
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4
src/random.cpp
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@ -227,10 +227,12 @@ void GetOSRand(unsigned char *ent32)
RandFailure(); RandFailure();
} }
} }
#elif defined(HAVE_GETENTROPY) #elif defined(HAVE_GETENTROPY) && defined(__OpenBSD__)
/* On OpenBSD this can return up to 256 bytes of entropy, will return an /* On OpenBSD this can return up to 256 bytes of entropy, will return an
* error if more are requested. * error if more are requested.
* The call cannot return less than the requested number of bytes. * The call cannot return less than the requested number of bytes.
getentropy is explicitly limited to openbsd here, as a similar (but not
the same) function may exist on other platforms via glibc.
*/ */
if (getentropy(ent32, NUM_OS_RANDOM_BYTES) != 0) { if (getentropy(ent32, NUM_OS_RANDOM_BYTES) != 0) {
RandFailure(); RandFailure();