Remove support for calling getrandom(), we now always call getentropy()

Only Linux and FreeBSD provide getrandom(), but they both also provide
getentropy() since the same version and we already tried to call that.

Reviewed-by: Andy Polyakov <appro@openssl.org>
GH: #6405

diff --git a/crypto/rand/rand_unix.c b/crypto/rand/rand_unix.c
index 0c8e0dc48885233953483a8c5b648070d0f06b7c..e698dfde651fbe69983ffc8450e8674a78d0f3d3 100644 (file)
--- a/crypto/rand/rand_unix.c
+++ b/crypto/rand/rand_unix.c
@@ -164,20 +164,6 @@ size_t rand_pool_acquire_entropy(RAND_POOL *pool)
 #   error "Seeding uses urandom but DEVRANDOM is not configured"
 #  endif
 
-#  if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
-#   if __GLIBC_PREREQ(2, 25)
-#    define OPENSSL_HAVE_GETRANDOM
-#   endif
-#  endif
-
-#  if (defined(__FreeBSD__) && __FreeBSD_version >= 1200061)
-#   define OPENSSL_HAVE_GETRANDOM
-#  endif
-
-#  if defined(OPENSSL_HAVE_GETRANDOM)
-#   include <sys/random.h>
-#  endif
-
 #  if defined(OPENSSL_RAND_SEED_OS)
 #   if !defined(DEVRANDOM)
 #    error "OS seeding requires DEVRANDOM to be configured"
@@ -265,10 +251,6 @@ int syscall_random(void *buf, size_t buflen)
     if (p_getentropy.p != NULL)
         return p_getentropy.f(buf, buflen);
 
-#  if defined(OPENSSL_HAVE_GETRANDOM)
-    return (int)getrandom(buf, buflen, 0);
-#  endif
-
     /* Linux supports this since version 3.17 */
 #  if defined(__linux) && defined(SYS_getrandom)
     return (int)syscall(SYS_getrandom, buf, buflen, 0);