diff --git a/include/drivers/auth/tbbr_cot_common.h b/include/drivers/auth/tbbr_cot_common.h
new file mode 100644
index 0000000..0ea5f65
--- /dev/null
+++ b/include/drivers/auth/tbbr_cot_common.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef TBBR_COT_COMMON_H
+#define TBBR_COT_COMMON_H
+
+#include <drivers/auth/auth_mod.h>
+
+extern unsigned char tb_fw_hash_buf[HASH_DER_LEN];
+extern unsigned char tb_fw_config_hash_buf[HASH_DER_LEN];
+extern unsigned char hw_config_hash_buf[HASH_DER_LEN];
+extern unsigned char scp_fw_hash_buf[HASH_DER_LEN];
+extern unsigned char nt_world_bl_hash_buf[HASH_DER_LEN];
+
+extern auth_param_type_desc_t trusted_nv_ctr;
+extern auth_param_type_desc_t subject_pk;
+extern auth_param_type_desc_t sig;
+extern auth_param_type_desc_t sig_alg;
+extern auth_param_type_desc_t raw_data;
+
+extern auth_param_type_desc_t tb_fw_hash;
+extern auth_param_type_desc_t tb_fw_config_hash;
+extern auth_param_type_desc_t hw_config_hash;
+
+extern const auth_img_desc_t trusted_boot_fw_cert;
+extern const auth_img_desc_t hw_config;
+
+#endif /* TBBR_COT_COMMON_H */