6 files changed, 14 insertions, 19 deletions
diff --git a/src/musl-libgen-c.h b/src/musl-libgen-c.h
index 99c90ee..d947197 100644
--- a/src/musl-libgen-c.h
+++ b/src/musl-libgen-c.h
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: MIT
+ *
  * Copied from musl.
  *
  * Copyright © 2005-2014 Rich Felker, et al.
diff --git a/src/random-seed.c b/src/random-seed.c
index 0b7c5c4..b8e8ad7 100644
--- a/src/random-seed.c
+++ b/src/random-seed.c
@@ -1,17 +1,4 @@
-/* Copyright 2018 Alex Xu (aka Hello71, alxu)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// SPDX-License-Identifier: BSD-3-Clause
 
 #include <assert.h>
 #include <errno.h>
@@ -30,6 +17,7 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
+#include "config.h"
 #include "musl-libgen-c.h"
 #include "util.h"
 
diff --git a/src/sha2.c b/src/sha2.c
index 4c2b615..d949537 100644
--- a/src/sha2.c
+++ b/src/sha2.c
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
  * FIPS 180-2 SHA-224/256/384/512 implementation
  * Last update: 02/02/2007
  * Issue date:  04/30/2005
diff --git a/src/sha2.h b/src/sha2.h
index bd968ba..e55b74f 100644
--- a/src/sha2.h
+++ b/src/sha2.h
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
  * FIPS 180-2 SHA-224/256/384/512 implementation
  * Last update: 02/02/2007
  * Issue date:  04/30/2005
diff --git a/src/util.c b/src/util.c
index a5eb220..908e3a2 100644
--- a/src/util.c
+++ b/src/util.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
+
 #include <assert.h>
 #include <limits.h>
 #include <stddef.h>
diff --git a/src/util.h b/src/util.h
index 9cd2bd4..8759cd0 100644
--- a/src/util.h
+++ b/src/util.h
@@ -1,5 +1,7 @@
-#ifndef UTIL_H
-#define UTIL_H
+// SPDX-License-Identifier: BSD-3-Clause
+
+#ifndef RANDOM_SEED_UTIL_H
+#define RANDOM_SEED_UTIL_H
 
 #include <errno.h>
 #include <stdbool.h>