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Clean up after using randombytes from libsodium

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When Curve authentication is used, libsodium opens a file
descriptor to /dev/urandom to generate random bytes. When
the ZMQ context terminates, it should ensure that file gets
closed.
This commit is contained in:
Jonathan Reams 2014-08-31 14:02:57 -04:00
parent ce75ea7448
commit 16b2db6062
1 changed files with 10 additions and 0 deletions
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10
src/ctx.cpp
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@ -35,6 +35,10 @@
#include "err.hpp" #include "err.hpp"
#include "msg.hpp" #include "msg.hpp"
#ifdef HAVE_LIBSODIUM
#include <sodium.h>
#endif
#define ZMQ_CTX_TAG_VALUE_GOOD 0xabadcafe #define ZMQ_CTX_TAG_VALUE_GOOD 0xabadcafe
#define ZMQ_CTX_TAG_VALUE_BAD 0xdeadbeef #define ZMQ_CTX_TAG_VALUE_BAD 0xdeadbeef
@ -89,6 +93,12 @@ zmq::ctx_t::~ctx_t ()
// corresponding io_thread/socket objects. // corresponding io_thread/socket objects.
free (slots); free (slots);
// If we've done any Curve encryption, we may have a file handle
// to /dev/urandom open that needs to be cleaned up.
#ifdef HAVE_LIBSODIUM
randombytes_close();
#endif
// Remove the tag, so that the object is considered dead. // Remove the tag, so that the object is considered dead.
tag = ZMQ_CTX_TAG_VALUE_BAD; tag = ZMQ_CTX_TAG_VALUE_BAD;
} }