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Add length check to Hmac_UpdateFinal_CT to prevent build error #9664

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Add length check to Hmac_UpdateFinal_CT to prevent build error #9664

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3 changes: 3 additions & 0 deletions src/tls.c
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Original file line number Diff line number Diff line change
Expand Up @@ -937,6 +937,9 @@ static int Hmac_UpdateFinal_CT(Hmac* hmac, byte* digest, const byte* in,
word32 realLen;
byte extraBlock;

if (macLen <= 0 || macLen > (int)sizeof(hmac->innerHash))
return BAD_FUNC_ARG;

switch (hmac->macType) {
#ifndef NO_SHA
case WC_SHA:
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