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diff --git a/include/tools_share/cca_oid.h b/include/tools_share/cca_oid.h
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+/*
+ * Copyright (c) 2022-2023, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef CCA_OID_H
+#define CCA_OID_H
+
+/* Reuse the Object IDs defined by TBBR for certificate extensions. */
+#include "tbbr_oid.h"
+
+/*
+ * Assign arbitrary Object ID values that do not conflict with any of the
+ * TBBR reserved OIDs.
+ */
+/* Platform root-of-trust public key */
+#define PROT_PK_OID "1.3.6.1.4.1.4128.2100.1102"
+/* Secure World root-of-trust public key */
+#define SWD_ROT_PK_OID "1.3.6.1.4.1.4128.2100.1103"
+/* Core Secure World public key */
+#define CORE_SWD_PK_OID "1.3.6.1.4.1.4128.2100.1104"
+/* Platform public key */
+#define PLAT_PK_OID "1.3.6.1.4.1.4128.2100.1105"
+/* Realm Monitor Manager (RMM) Hash */
+#define RMM_HASH_OID "1.3.6.1.4.1.4128.2100.1106"
+
+/* CCAFirmwareNVCounter - Non-volatile counter extension */
+#define CCA_FW_NVCOUNTER_OID "1.3.6.1.4.1.4128.2100.3"
+
+/*
+ * First undef previous definitions from tbbr_oid.h.
+ * CCA ROTPK authenticates BL31 and its configuration image in
+ * CCA CoT.
+ **/
+#undef BL31_IMAGE_KEY_OID
+#undef SOC_FW_CONFIG_KEY_OID
+#undef HW_CONFIG_KEY_OID
+#define BL31_IMAGE_KEY_OID ZERO_OID
+#define SOC_FW_CONFIG_KEY_OID ZERO_OID
+#define HW_CONFIG_KEY_OID ZERO_OID
+#define RMM_IMAGE_KEY_OID ZERO_OID
+
+#endif /* CCA_OID_H */