1 files changed, 41 insertions, 0 deletions
diff --git a/usr/src/lib/libc/port/gen/getentropy.c b/usr/src/lib/libc/port/gen/getentropy.c
new file mode 100644
index 0000000000..4392727a95
--- /dev/null
+++ b/usr/src/lib/libc/port/gen/getentropy.c
@@ -0,0 +1,41 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright (c) 2015, Joyent, Inc.
+ */
+
+/*
+ * getentropy(3C) is an OpenBSD compatible wrapper around getrandom(2).
+ */
+
+#include <errno.h>
+#include <sys/random.h>
+
+int
+getentropy(void *buf, size_t buflen)
+{
+	int ret;
+
+	if (buflen > 256) {
+		errno = EIO;
+		return (-1);
+	}
+
+	ret = getrandom(buf, buflen, 0);
+	if (ret == -1 || ret != buflen) {
+		if (errno != EFAULT)
+			errno = EIO;
+		return (-1);
+	}
+
+	return (0);
+}