diff options
| -rw-r--r-- | configure.ac | 8 | ||||
| -rw-r--r-- | src/random.cpp | 14 |
2 files changed, 21 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index ba523d3762..fd1396fc9e 100644 --- a/configure.ac +++ b/configure.ac @@ -674,6 +674,14 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>]], [ AC_MSG_RESULT(no)] ) +AC_MSG_CHECKING(for getentropy via random.h) +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h> + #include <sys/random.h>]], + [[ getentropy(nullptr, 32) ]])], + [ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_GETENTROPY_RAND, 1,[Define this symbol if the BSD getentropy system call is available with sys/random.h]) ], + [ AC_MSG_RESULT(no)] +) + AC_MSG_CHECKING(for sysctl KERN_ARND) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h> #include <sys/sysctl.h>]], diff --git a/src/random.cpp b/src/random.cpp index b308e8f4a1..e07ef44471 100644 --- a/src/random.cpp +++ b/src/random.cpp @@ -27,9 +27,12 @@ #include <sys/syscall.h> #include <linux/random.h> #endif -#ifdef HAVE_GETENTROPY +#if defined(HAVE_GETENTROPY) || (defined(HAVE_GETENTROPY_RAND) && defined(MAC_OSX)) #include <unistd.h> #endif +#if defined(HAVE_GETENTROPY_RAND) && defined(MAC_OSX) +#include <sys/random.h> +#endif #ifdef HAVE_SYSCTL_ARND #include <sys/sysctl.h> #endif @@ -237,6 +240,15 @@ void GetOSRand(unsigned char *ent32) if (getentropy(ent32, NUM_OS_RANDOM_BYTES) != 0) { RandFailure(); } +#elif defined(HAVE_GETENTROPY_RAND) && defined(MAC_OSX) + // We need a fallback for OSX < 10.12 + if (&getentropy != NULL) { + if (getentropy(ent32, NUM_OS_RANDOM_BYTES) != 0) { + RandFailure(); + } + } else { + GetDevURandom(ent32); + } #elif defined(HAVE_SYSCTL_ARND) /* FreeBSD and similar. It is possible for the call to return less * bytes than requested, so need to read in a loop. |