Merge pull request spacemonkeygo#67 from diffeo/master

FIPS Mode capability

fips.go

@@ -0,0 +1,27 @@
+// +build cgo
+
+package openssl
+
+/*
+#include <openssl/ssl.h>
+*/
+import "C"
+import "runtime"
+
+// FIPSModeSet enables a FIPS 140-2 validated mode of operation.
+// https://wiki.openssl.org/index.php/FIPS_mode_set()
+func FIPSModeSet(mode bool) error {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	var r C.int
+	if mode {
+		r = C.FIPS_mode_set(1)
+	} else {
+		r = C.FIPS_mode_set(0)
+	}
+	if r != 1 {
+		return errorFromErrorQueue()
+	}
+	return nil
+}