7ec3f7
From e4f08157b6693b956fe9c7c987bc3eeac1abb2cc Mon Sep 17 00:00:00 2001
7ec3f7
From: Tim Shearer <timtimminz@gmail.com>
7ec3f7
Date: Tue, 2 Aug 2022 08:48:32 -0400
7ec3f7
Subject: [PATCH] Fix incorrect SHA384/512 digest calculation.
7ec3f7
7ec3f7
Resolves an issue where certain message sizes result in an incorrect
7ec3f7
checksum. Specifically, when:
7ec3f7
(n*8) mod 1024 == 896
7ec3f7
where n is the file size in bytes.
7ec3f7
---
7ec3f7
 lib/util/sha2.c | 2 +-
7ec3f7
 1 file changed, 1 insertion(+), 1 deletion(-)
7ec3f7
7ec3f7
diff --git a/lib/util/sha2.c b/lib/util/sha2.c
7ec3f7
index b7a28cca8..f769f77f2 100644
7ec3f7
--- a/lib/util/sha2.c
7ec3f7
+++ b/lib/util/sha2.c
7ec3f7
@@ -490,7 +490,7 @@ SHA512Pad(SHA2_CTX *ctx)
7ec3f7
 	SHA512Update(ctx, (uint8_t *)"\200", 1);
7ec3f7
 
7ec3f7
 	/* Pad message such that the resulting length modulo 1024 is 896. */
7ec3f7
-	while ((ctx->count[0] & 1008) != 896)
7ec3f7
+	while ((ctx->count[0] & 1016) != 896)
7ec3f7
 		SHA512Update(ctx, (uint8_t *)"\0", 1);
7ec3f7
 
7ec3f7
 	/* Append length of message in bits and do final SHA512Transform(). */