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-rw-r--r--lib/sha1.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/sha1.c b/lib/sha1.c
index 5a56dfd7b99d..1d96d2c02b82 100644
--- a/lib/sha1.c
+++ b/lib/sha1.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* SHA1 routine optimized to do word accesses rather than byte accesses,
* and to avoid unnecessary copies into the context array.