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Fix incorrect SHA384/512 digest calculation.

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Resolves an issue where certain message sizes result in an incorrect
checksum. Specifically, when:
(n*8) mod 1024 == 896
where n is the file size in bytes.
This commit is contained in:
Tim Shearer
2022-08-02 08:48:32 -04:00
committed by Tim Shearer
parent cf250354fc
commit e4f08157b6
1 changed files with 1 additions and 1 deletions
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2
lib/util/sha2.c
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@@ -490,7 +490,7 @@ SHA512Pad(SHA2_CTX *ctx)
SHA512Update(ctx, (uint8_t *)"\200", 1); SHA512Update(ctx, (uint8_t *)"\200", 1);
/* Pad message such that the resulting length modulo 1024 is 896. */ /* Pad message such that the resulting length modulo 1024 is 896. */
while ((ctx->count[0] & 1008) != 896) while ((ctx->count[0] & 1016) != 896)
SHA512Update(ctx, (uint8_t *)"\0", 1); SHA512Update(ctx, (uint8_t *)"\0", 1);
/* Append length of message in bits and do final SHA512Transform(). */ /* Append length of message in bits and do final SHA512Transform(). */