Using arc4random_buf instead of getentropy. Thanks to Leont for GH#16

david-dick · Jan 13, 2025 · d07eae1 · d07eae1
1 parent be528e2
commit d07eae1
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Showing 2 changed files with 8 additions and 6 deletions.
diff --git a/URandom.xs b/URandom.xs
@@ -42,10 +42,12 @@ crypt_urandom_getrandom(length)
 	result = syscall(SYS_getrandom, data, length, GRND_NONBLOCK);
 #else
 #ifdef HAVE_CRYPT_URANDOM_NATIVE_GETENTROPY
-        result = getentropy(data, length);
+        arc4random_buf(data, length);
+        result = length;
 #else
 #ifdef HAVE_CRYPT_URANDOM_UNISTD_GETENTROPY
-        result = getentropy(data, length);
+        arc4random_buf(data, length);
+        result = length;
 #else
         croak("Unable to find getrandom or an alternative");
 #endif

diff --git a/check_random.inc b/check_random.inc
@@ -63,8 +63,8 @@ int main(void)
 {
         char buf[5];
         int l = 5;
-        int r = getentropy(buf, l);
-        return 0;
+        arc4random_buf(buf, l);
+        return l;
 }
 _OUT_
 		close FOO or die "Failed to close $test_file_name:$!";
@@ -83,8 +83,8 @@ int main(void)
 {
         char buf[5];
         int l = 5;
-        int r = getentropy(buf, l);
-        return 0;
+        arc4random_buf(buf, l);
+        return l;
 }
 _OUT_
 			close FOO or die "Failed to close $test_file_name:$!";