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Check PreMasterSecret.protocol

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This commit is contained in:
Zhi Guan
2026-06-15 14:36:39 +08:00
parent 66bd98caa0
commit 2093f5ad4f
3 changed files with 8 additions and 2 deletions
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6
src/tlcp.c
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@@ -2247,6 +2247,12 @@ int tlcp_recv_client_key_exchange(TLS_CONNECT *conn)
tls_send_alert(conn, TLS_alert_decrypt_error);
return -1;
}
if ((((uint16_t)conn->pre_master_secret[0] << 8) | conn->pre_master_secret[1])
!= TLS_protocol_tlcp) {
error_print();
tls_send_alert(conn, TLS_alert_decrypt_error);
return -1;
}
if (digest_update(&conn->dgst_ctx, conn->record + 5, conn->recordlen - 5) != 1) {
error_print();
return -1;