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Added comment with empty hash imofrmation

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jackctj117
2025-12-15 10:52:24 -07:00
parent 6c5e84178e
commit 585a8d22aa
1 changed files with 4 additions and 0 deletions
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4
src/tls13.c
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@@ -1197,6 +1197,8 @@ int DeriveHandshakeSecret(WOLFSSL* ssl)
return ret;
#endif
/* Derive-Secret(., "derived", "") per RFC 8446 Section 7.1.
* Empty hash (NULL, 0) is required by the TLS 1.3 key schedule. */
ret = DeriveKeyMsg(ssl, key, -1, ssl->arrays->secret,
derivedLabel, DERIVED_LABEL_SZ,
NULL, 0, ssl->specs.mac_algorithm);
@@ -1232,6 +1234,8 @@ int DeriveMasterSecret(WOLFSSL* ssl)
return ret;
#endif
/* Derive-Secret(., "derived", "") per RFC 8446 Section 7.1.
* Empty hash (NULL, 0) is required by the TLS 1.3 key schedule. */
ret = DeriveKeyMsg(ssl, key, -1, ssl->arrays->preMasterSecret,
derivedLabel, DERIVED_LABEL_SZ,
NULL, 0, ssl->specs.mac_algorithm);