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-rw-r--r--extmod/crypto-algorithms/sha256.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/extmod/crypto-algorithms/sha256.c b/extmod/crypto-algorithms/sha256.c
index 276611cfd..24e964749 100644
--- a/extmod/crypto-algorithms/sha256.c
+++ b/extmod/crypto-algorithms/sha256.c
@@ -1,7 +1,8 @@
/*********************************************************************
+* Source: https://github.com/B-Con/crypto-algorithms
* Filename: sha256.c
* Author: Brad Conte (brad AT bradconte.com)
-* Copyright:
+* Copyright: This code is released into the public domain.
* Disclaimer: This code is presented "as is" without any guarantees.
* Details: Implementation of the SHA-256 hashing algorithm.
SHA-256 is one of the three algorithms in the SHA2