diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index 5bd53f3..c825bf4 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -18,6 +18,12 @@
  * Definitions common to all ARM standard platforms
  *****************************************************************************/
 
+/*
+ * Root of trust key hash lengths
+ */
+#define ARM_ROTPK_HEADER_LEN		19
+#define ARM_ROTPK_HASH_LEN		32
+
 /* Special value used to verify platform parameters from BL2 to BL31 */
 #define ARM_BL31_PLAT_PARAM_VAL		ULL(0x0f1e2d3c4b5a6978)
 
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 02feec7..32dc9f9 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -142,6 +142,11 @@
 #define STATE_SW_E_PARAM		(-2)
 #define STATE_SW_E_DENIED		(-3)
 
+/* plat_get_rotpk_info() flags */
+#define ARM_ROTPK_REGS_ID		1
+#define ARM_ROTPK_DEVEL_RSA_ID		2
+#define ARM_ROTPK_DEVEL_ECDSA_ID	3
+
 /* IO storage utility functions */
 void arm_io_setup(void);
 
@@ -255,9 +260,17 @@
 __dead2 void plat_arm_error_handler(int err);
 
 /*
- * Optional function in ARM standard platforms
+ * Optional functions in ARM standard platforms
  */
 void plat_arm_override_gicr_frames(const uintptr_t *plat_gicr_frames);
+int arm_get_rotpk_info(void **key_ptr, unsigned int *key_len,
+	unsigned int *flags);
+int arm_get_rotpk_info_regs(void **key_ptr, unsigned int *key_len,
+	unsigned int *flags);
+int arm_get_rotpk_info_cc(void **key_ptr, unsigned int *key_len,
+	unsigned int *flags);
+int arm_get_rotpk_info_dev(void **key_ptr, unsigned int *key_len,
+	unsigned int *flags);
 
 #if ARM_PLAT_MT
 unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr);