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20865: Don't use getentropy() on OSX Sierra.

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Tor 0.2.9 has a broader range of fixes and workarounds here, but for
0.2.8, we're just going to maintain the existing behavior.

(The alternative would be to backport both
1eba088054 and
16fcbd21c9 , but the latter is kind of
a subtle kludge in the configure.ac script, and I'm not a fan of
backporting that kind of thing.)
This commit is contained in:
Nick Mathewson 2016-12-05 09:37:03 -05:00
parent 1122137fa0
commit 714aeedc52
2 changed files with 16 additions and 0 deletions
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7
changes/bug20865 Normal file
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@ -0,0 +1,7 @@
o Minor bugfixes (portability):
- Avoid compilation errors when building on OSX Sierra. Sierra began
to support the getentropy() API, but created a few problems in
doing so. Tor 0.2.9 has a more thorough set of workarounds; in
0.2.8, we are just using the /dev/urandom interface. Fixes
bug 20865. Bugfix on 0.2.8.1-alpha.

9
src/common/crypto.c
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@ -88,6 +88,15 @@
#include "keccak-tiny/keccak-tiny.h"
#ifdef __APPLE__
/* Apple messed up their getentropy definitions in Sierra. It's not insecure
* or anything (as far as I know) but it makes compatible builds hard. 0.2.9
* contains the necessary tricks to do it right: in 0.2.8, we're just using
* this blunt instrument.
*/
#undef HAVE_GETENTROPY
#endif
#ifdef ANDROID
/* Android's OpenSSL seems to have removed all of its Engine support. */
#define DISABLE_ENGINES