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harden compare of mac with TLS 1.3 finished

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JacobBarthelmeh
2026-03-04 10:49:02 -07:00
parent 350706d2c8
commit 5117acb7be
1 changed files with 1 additions and 1 deletions
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src/tls13.c
+1 -1
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@@ -11178,7 +11178,7 @@ int DoTls13Finished(WOLFSSL* ssl, const byte* input, word32* inOutIdx,
if (sniff == NO_SNIFF) {
/* Actually check verify data. */
if (size > WC_MAX_DIGEST_SIZE ||
XMEMCMP(input + *inOutIdx, mac, size) != 0){
ConstantCompare(input + *inOutIdx, mac, size) != 0){
WOLFSSL_MSG("Verify finished error on hashes");
SendAlert(ssl, alert_fatal, decrypt_error);
WOLFSSL_ERROR_VERBOSE(VERIFY_FINISHED_ERROR);