feat(arm): use the provided hash alg to hash rotpk

No longer hard code SHA-256 hashed dev rotpks, instead
use the algorithm given by HASH_ALG. This means that
we no longer need the plat_arm_configs (once the protpk and
swd_rotpk are also updated to use HASH_ALG).

The rot public key is now generated at build time, as is
the header for the key.

Also support some default 3k and 4k RSA keys.

Change-Id: I33538124aeb4fa7d67918d878d17f2a84d3a6756
Signed-off-by: Ryan Everett <ryan.everett@arm.com>
diff --git a/include/plat/arm/board/common/rotpk/rotpk_def.h b/include/plat/arm/board/common/rotpk/rotpk_def.h
index 685c21a..a45eebb 100644
--- a/include/plat/arm/board/common/rotpk/rotpk_def.h
+++ b/include/plat/arm/board/common/rotpk/rotpk_def.h
@@ -18,7 +18,4 @@
 #ifndef ARM_ROTPK_HEADER_LEN
 #define ARM_ROTPK_HEADER_LEN		19
 #endif
-#ifndef ARM_ROTPK_HASH_LEN
-#define ARM_ROTPK_HASH_LEN		32
-#endif
 #endif /* ROTPK_DEF_H */
diff --git a/include/plat/nuvoton/common/npcm845x_arm_def.h b/include/plat/nuvoton/common/npcm845x_arm_def.h
index df3ad24..4642001 100644
--- a/include/plat/nuvoton/common/npcm845x_arm_def.h
+++ b/include/plat/nuvoton/common/npcm845x_arm_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2023, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2024, ARM Limited and Contributors. All rights reserved.
  *
  * Copyright (C) 2017-2023 Nuvoton Ltd.
  *
@@ -33,7 +33,6 @@
  * 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/plat/arm/board/common/board_common.mk b/plat/arm/board/common/board_common.mk
index 365a960..567fe2a 100644
--- a/plat/arm/board/common/board_common.mk
+++ b/plat/arm/board/common/board_common.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015-2023, Arm Limited and Contributors. All rights reserved.
+# Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -13,63 +13,70 @@
 
 ifneq (${TRUSTED_BOARD_BOOT},0)
 ARM_ROTPK_S = plat/arm/board/common/rotpk/arm_dev_rotpk.S
+ARM_ROTPK = $(BUILD_PLAT)/arm_rotpk.bin
+ARM_ROTPK_IS_HASH := 1
+$(eval $(call add_define_val,ARM_ROTPK,'"$(ARM_ROTPK)"'))
 
 # ROTPK hash location
 ifeq (${ARM_ROTPK_LOCATION}, regs)
 	ARM_ROTPK_LOCATION_ID = ARM_ROTPK_REGS_ID
-else ifeq (${ARM_ROTPK_LOCATION}, devel_rsa)
+else
+# The ROTPK is a development key
+ifeq (${ARM_ROTPK_LOCATION}, devel_rsa)
 	CRYPTO_ALG=rsa
 	ARM_ROTPK_LOCATION_ID = ARM_ROTPK_DEVEL_RSA_ID
-	ARM_ROTPK_HASH = plat/arm/board/common/rotpk/arm_rotpk_rsa_sha256.bin
-$(eval $(call add_define_val,ARM_ROTPK_HASH,'"$(ARM_ROTPK_HASH)"'))
-$(BUILD_PLAT)/bl2/arm_dev_rotpk.o : $(ARM_ROTPK_HASH)
+	ROT_KEY ?= plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem
 $(warning Development keys support for FVP is deprecated. Use `regs` \
 option instead)
 else ifeq (${ARM_ROTPK_LOCATION}, devel_ecdsa)
 	CRYPTO_ALG=ec
 	ARM_ROTPK_LOCATION_ID = ARM_ROTPK_DEVEL_ECDSA_ID
-	ARM_ROTPK_HASH = plat/arm/board/common/rotpk/arm_rotpk_ecdsa_sha256.bin
-$(eval $(call add_define_val,ARM_ROTPK_HASH,'"$(ARM_ROTPK_HASH)"'))
-$(BUILD_PLAT)/bl2/arm_dev_rotpk.o : $(ARM_ROTPK_HASH)
+	ROT_KEY ?= plat/arm/board/common/rotpk/arm_rotprivk_ecdsa.pem
 $(warning Development keys support for FVP is deprecated. Use `regs` \
 option instead)
 else ifeq (${ARM_ROTPK_LOCATION}, devel_full_dev_rsa_key)
 	CRYPTO_ALG=rsa
 	ARM_ROTPK_LOCATION_ID = ARM_ROTPK_DEVEL_FULL_DEV_RSA_KEY_ID
-	ARM_ROTPK_S = plat/arm/board/common/rotpk/arm_full_dev_rsa_rotpk.S
+	ROT_KEY ?= plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem
+	ARM_ROTPK_IS_HASH = 0
 $(warning Development keys support for FVP is deprecated. Use `regs` \
 option instead)
 else ifeq (${ARM_ROTPK_LOCATION}, devel_full_dev_ecdsa_key)
 	CRYPTO_ALG=ec
 	ARM_ROTPK_LOCATION_ID = ARM_ROTPK_DEVEL_FULL_DEV_ECDSA_KEY_ID
-ifeq (${KEY_SIZE},384)
-	ARM_ROTPK_S = plat/arm/board/common/rotpk/arm_full_dev_ecdsa_p384_rotpk.S
-else
-	ARM_ROTPK_S = plat/arm/board/common/rotpk/arm_full_dev_ecdsa_p256_rotpk.S
-endif
+	ROT_KEY ?= plat/arm/board/common/rotpk/arm_rotprivk_ecdsa.pem
+	ARM_ROTPK_IS_HASH = 0
 $(warning Development keys support for FVP is deprecated. Use `regs` \
 option instead)
 else
 $(error "Unsupported ARM_ROTPK_LOCATION value")
 endif
+$(BUILD_PLAT)/bl1/arm_dev_rotpk.o : $(ARM_ROTPK)
+$(BUILD_PLAT)/bl2/arm_dev_rotpk.o : $(ARM_ROTPK)
+endif
 
 $(eval $(call add_define,ARM_ROTPK_LOCATION_ID))
+$(eval $(call add_define,ARM_ROTPK_IS_HASH))
 
 ifeq (${ENABLE_RME}, 1)
 COT	:=	cca
 endif
 
-# Force generation of the new hash if ROT_KEY is specified
+# Force generation of the ROT public key if ROT_KEY is specified
 ifdef ROT_KEY
-	HASH_PREREQUISITES = $(ROT_KEY) FORCE
+	PK_PREREQUISITES = $(ROT_KEY) FORCE
 endif
 
-$(ARM_ROTPK_HASH) : $(HASH_PREREQUISITES)
+$(ARM_ROTPK) : $(PK_PREREQUISITES)
 ifndef ROT_KEY
-	$(error Cannot generate hash: no ROT_KEY defined)
+	$(error Cannot generate public key: no ROT_KEY defined)
 endif
+ifeq ($(ARM_ROTPK_IS_HASH), 1)
 	${OPENSSL_BIN_PATH}/openssl ${CRYPTO_ALG} -in $< -pubout -outform DER | \
-	${OPENSSL_BIN_PATH}/openssl dgst -sha256 -binary > $@
+	${OPENSSL_BIN_PATH}/openssl dgst -${HASH_ALG} -binary -out $@
+else
+	${OPENSSL_BIN_PATH}/openssl ${CRYPTO_ALG} -in $< -pubout -outform DER -out $@
+endif
 
 # Certificate NV-Counters. Use values corresponding to tied off values in
 # ARM development platforms
diff --git a/plat/arm/board/common/rotpk/arm_dev_rotpk.S b/plat/arm/board/common/rotpk/arm_dev_rotpk.S
index 22ae9d3..c2f2bc6 100644
--- a/plat/arm/board/common/rotpk/arm_dev_rotpk.S
+++ b/plat/arm/board/common/rotpk/arm_dev_rotpk.S
@@ -6,20 +6,64 @@
 
 #include <plat/arm/board/common/rotpk/rotpk_def.h>
 
+#if ARM_ROTPK_IS_HASH == 1
 	.global arm_rotpk_header
+	.global arm_rotpk_hash_end
 	.section .rodata.arm_rotpk_hash, "a"
 
+	#ifndef ARM_ROTPK_HASH_LEN
+	.error "ROTPK hash not defined."
+	#endif
+
+	/*
+	* The rotpk header is dependent only on the algorithm used to
+	* generate the hash.
+	* ASN1_HASH_ALG is the last byte used to encode the OID for
+	* the hash algorithm into the header,
+	* this byte distinguishes between SHA256, SHA384 and SHA512.
+	*/
+	.equ HASH_ASN1_LEN, ARM_ROTPK_HASH_LEN
+	#if ARM_ROTPK_HASH_LEN == 48
+		.equ ASN1_HASH_ALG, 0x02
+		.equ TOTAL_ASN1_LEN, 0x41
+	#elif ARM_ROTPK_HASH_LEN == 64
+		.equ ASN1_HASH_ALG, 0x03
+		.equ TOTAL_ASN1_LEN, 0x51
+	#elif ARM_ROTPK_HASH_LEN == 32
+		.equ ASN1_HASH_ALG, 0x01
+		.equ TOTAL_ASN1_LEN, 0x31
+	#else
+		.error "Invalid ROTPK hash length."
+	#endif
+
 arm_rotpk_header:
-	.byte 0x30, 0x31, 0x30, 0x0D, 0x06, 0x09, 0x60, 0x86, 0x48
-	.byte 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
+	.byte 0x30, TOTAL_ASN1_LEN, 0x30, 0x0D, 0x06, 0x09, 0x60, 0x86, 0x48
+	.byte 0x01, 0x65, 0x03, 0x04, 0x02, ASN1_HASH_ALG, 0x05, 0x00, 0x04, HASH_ASN1_LEN
 arm_rotpk_header_len:
 
-#ifdef ARM_ROTPK_HASH
-	.global arm_rotpk_hash_end
-	.incbin ARM_ROTPK_HASH
+#ifdef ARM_ROTPK
+	.incbin ARM_ROTPK
 arm_rotpk_hash_end:
 #endif
 
-.if ARM_ROTPK_HEADER_LEN != arm_rotpk_header_len - arm_rotpk_header
-.error "Invalid ROTPK header length."
-.endif
+	.if ARM_ROTPK_HEADER_LEN != arm_rotpk_header_len - arm_rotpk_header
+		.error "Invalid ROTPK header length."
+	.endif
+
+#else
+	/*
+	* The rotpk is an unhashed public key in DER format.
+	* We do not need a header in this case.
+	*/
+	.global arm_rotpk_key
+	.section .rodata.arm_rotpk_key, "a"
+
+arm_rotpk_key:
+	#ifdef ARM_ROTPK
+		.global arm_rotpk_key_end
+		.incbin ARM_ROTPK
+arm_rotpk_key_end:
+	#else
+		.error "ROTPK not found."
+	#endif
+#endif
\ No newline at end of file
diff --git a/plat/arm/board/common/rotpk/arm_full_dev_ecdsa_p256_rotpk.S b/plat/arm/board/common/rotpk/arm_full_dev_ecdsa_p256_rotpk.S
deleted file mode 100644
index 690bdbc..0000000
--- a/plat/arm/board/common/rotpk/arm_full_dev_ecdsa_p256_rotpk.S
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright (c) 2023, Arm Limited. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-	.global arm_rotpk_key
-	.global arm_rotpk_key_end
-
-	.section .rodata.arm_rotpk_key, "a"
-
-/* Derived from arm_rotprivk_ecdsa.pem private key file. */
-arm_rotpk_key:
-	.byte 0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2A, 0x86, 0x48, 0xCE, 0x3D
-	.byte 0x02, 0x01, 0x06, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01
-	.byte 0x07, 0x03, 0x42, 0x00, 0x04, 0x9B, 0xE6, 0x48, 0xBD, 0x34, 0x38
-	.byte 0xE1, 0xA2, 0xA4, 0xF3, 0x70, 0xE1, 0x54, 0xBB, 0x2F, 0xB0, 0x5A
-	.byte 0x4A, 0x0C, 0xFF, 0xC2, 0x87, 0xDB, 0xC0, 0xFB, 0x81, 0xE9, 0xF9
-	.byte 0xF9, 0x95, 0x7D, 0x7E, 0xA0, 0x0C, 0x7F, 0x0A, 0xD4, 0xE0, 0x62
-	.byte 0x4A, 0x94, 0x5F, 0xEC, 0x52, 0x7D, 0x44, 0x63, 0xC8, 0x9F, 0x61
-	.byte 0xFA, 0xC6, 0xCB, 0x7E, 0x6B, 0x53, 0xAD, 0x2C, 0xC5, 0x94, 0x0D
-	.byte 0x1A, 0x86, 0x91
-arm_rotpk_key_end:
diff --git a/plat/arm/board/common/rotpk/arm_full_dev_ecdsa_p384_rotpk.S b/plat/arm/board/common/rotpk/arm_full_dev_ecdsa_p384_rotpk.S
deleted file mode 100644
index eaf2de4..0000000
--- a/plat/arm/board/common/rotpk/arm_full_dev_ecdsa_p384_rotpk.S
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (c) 2023, Arm Limited. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-	.global arm_rotpk_key
-	.global arm_rotpk_key_end
-
-	.section .rodata.arm_rotpk_key, "a"
-
-/* Derived from arm_rotprivk_ecdsa_secp384r1.pem private key file. */
-arm_rotpk_key:
-	.byte 0x30, 0x76, 0x30, 0x10, 0x06, 0x07, 0x2A, 0x86, 0x48, 0xCE, 0x3D
-	.byte 0x02, 0x01, 0x06, 0x05, 0x2B, 0x81, 0x04, 0x00, 0x22, 0x03, 0x62
-	.byte 0x00, 0x04, 0xB8, 0xB0, 0xC7, 0xC4, 0x57, 0x19, 0xB7, 0x5A, 0x06
-	.byte 0x36, 0xC5, 0xD8, 0x3C, 0x4E, 0xC3, 0xB5, 0xE1, 0x15, 0x60, 0x0E
-	.byte 0x63, 0xD8, 0xAF, 0x22, 0x2C, 0x6D, 0x79, 0x29, 0xDF, 0x46, 0xA9
-	.byte 0x30, 0x12, 0x16, 0x2D, 0x4F, 0x0F, 0x96, 0x6B, 0x1F, 0x87, 0x06
-	.byte 0xDB, 0x8F, 0xD7, 0x08, 0x46, 0xE4, 0x4C, 0x22, 0xF3, 0xDE, 0xCE
-	.byte 0x0F, 0x72, 0x27, 0x00, 0xAA, 0xD8, 0xC3, 0x79, 0x80, 0x5E, 0xF1
-	.byte 0x35, 0x1B, 0x33, 0xB6, 0x31, 0xC4, 0x59, 0xD4, 0xE9, 0x65, 0x91
-	.byte 0x22, 0x58, 0x2F, 0x87, 0xF1, 0x6C, 0x27, 0xBE, 0x99, 0x6F, 0x5F
-	.byte 0x6C, 0x14, 0xC5, 0x37, 0x0C, 0x73, 0xB4, 0xE4, 0x8A, 0x63
-arm_rotpk_key_end:
diff --git a/plat/arm/board/common/rotpk/arm_full_dev_rsa_rotpk.S b/plat/arm/board/common/rotpk/arm_full_dev_rsa_rotpk.S
deleted file mode 100644
index 4532e53..0000000
--- a/plat/arm/board/common/rotpk/arm_full_dev_rsa_rotpk.S
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (c) 2022-2023, Arm Limited. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-	.global arm_rotpk_key
-	.global arm_rotpk_key_end
-
-	.section .rodata.arm_rotpk_key, "a"
-
-arm_rotpk_key:
-	.byte 0x30, 0x82, 0x01, 0x22, 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48
-	.byte 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01
-	.byte 0x0F, 0x00, 0x30, 0x82, 0x01, 0x0A, 0x02, 0x82, 0x01, 0x01, 0x00
-	.byte 0xCB, 0x2C, 0x60, 0xD5, 0x8D, 0x63, 0xD4, 0x07, 0x79, 0x7E, 0xC7
-	.byte 0x16, 0x96, 0xBD, 0x4D, 0x24, 0x4E, 0xAC, 0x86, 0xE6, 0xB7, 0x71
-	.byte 0xE3, 0xC5, 0x54, 0x0B, 0xE7, 0x14, 0x1C, 0xBD, 0x29, 0x1A, 0xC1
-	.byte 0x3F, 0x7A, 0xB6, 0x02, 0xAA, 0xAB, 0x36, 0xC4, 0xD9, 0x36, 0x69
-	.byte 0x6C, 0xE2, 0x65, 0xC3, 0x9B, 0xB1, 0xBF, 0x3D, 0xA8, 0x56, 0x26
-	.byte 0xCB, 0xFD, 0x04, 0x01, 0xBA, 0xAC, 0x3E, 0x54, 0x32, 0xCA, 0x79
-	.byte 0x5E, 0xBB, 0xB2, 0x05, 0xEA, 0x06, 0x58, 0xF2, 0x74, 0xBA, 0xE1
-	.byte 0xF4, 0x87, 0xC0, 0x19, 0x0A, 0x1F, 0x66, 0x07, 0x77, 0x84, 0x83
-	.byte 0xA1, 0x1C, 0xEF, 0xFF, 0x28, 0x59, 0xE7, 0xC3, 0x68, 0x7D, 0x26
-	.byte 0x20, 0x43, 0xEB, 0x56, 0x63, 0xF3, 0x39, 0x31, 0xD8, 0x2B, 0x51
-	.byte 0xA9, 0xBC, 0x4F, 0xD0, 0xF6, 0xDE, 0x95, 0xDC, 0x5F, 0x5B, 0xC1
-	.byte 0xED, 0x90, 0x6F, 0xEC, 0x28, 0x91, 0x7E, 0x17, 0xED, 0x78, 0x90
-	.byte 0xF4, 0x60, 0xA7, 0xC4, 0xC7, 0x4F, 0x50, 0xED, 0x5D, 0x13, 0x3A
-	.byte 0x21, 0x2B, 0x70, 0xC5, 0x61, 0x7B, 0x08, 0x21, 0x65, 0x3A, 0xCD
-	.byte 0x82, 0x56, 0x8C, 0x7A, 0x47, 0xAC, 0x89, 0xE8, 0xA5, 0x48, 0x48
-	.byte 0x31, 0xD9, 0x1D, 0x46, 0xE5, 0x85, 0x86, 0x98, 0xA0, 0xE5, 0xC0
-	.byte 0xA6, 0x6A, 0xBD, 0x07, 0xE4, 0x92, 0x57, 0x61, 0x07, 0x8F, 0x7D
-	.byte 0x5A, 0x4D, 0xCA, 0xAE, 0x36, 0xB9, 0x56, 0x04, 0x10, 0xF2, 0x6C
-	.byte 0xBE, 0xF6, 0x3B, 0x6C, 0x80, 0x3E, 0xBE, 0x0E, 0xA3, 0x4D, 0xC7
-	.byte 0xD4, 0x7E, 0xA7, 0x49, 0xD4, 0xF2, 0xD2, 0xBC, 0xCF, 0x30, 0xA8
-	.byte 0xE7, 0x74, 0x8F, 0x64, 0xDF, 0xBC, 0x5C, 0x47, 0x68, 0xCC, 0x40
-	.byte 0x4C, 0xF8, 0x83, 0xCC, 0xCB, 0x40, 0x35, 0x04, 0x60, 0xCA, 0xB3
-	.byte 0xA4, 0x17, 0x9F, 0x03, 0xCA, 0x1D, 0x5A, 0xFA, 0xD1, 0xAF, 0x21
-	.byte 0x57, 0x10, 0xD3, 0x02, 0x03, 0x01, 0x00, 0x01
-arm_rotpk_key_end:
diff --git a/plat/arm/board/common/rotpk/arm_rotpk_ecdsa.der b/plat/arm/board/common/rotpk/arm_rotpk_ecdsa.der
deleted file mode 100644
index 2547877..0000000
--- a/plat/arm/board/common/rotpk/arm_rotpk_ecdsa.der
+++ /dev/null
Binary files differ
diff --git a/plat/arm/board/common/rotpk/arm_rotpk_ecdsa_sha256.bin b/plat/arm/board/common/rotpk/arm_rotpk_ecdsa_sha256.bin
deleted file mode 100644
index c5e123a..0000000
--- a/plat/arm/board/common/rotpk/arm_rotpk_ecdsa_sha256.bin
+++ /dev/null
@@ -1 +0,0 @@
-.@¿nù»˜1q	=ýÑÌiJ˜ë‹ ° †Nl
\ No newline at end of file
diff --git a/plat/arm/board/common/rotpk/arm_rotpk_rsa.der b/plat/arm/board/common/rotpk/arm_rotpk_rsa.der
deleted file mode 100644
index 661f899..0000000
--- a/plat/arm/board/common/rotpk/arm_rotpk_rsa.der
+++ /dev/null
Binary files differ
diff --git a/plat/arm/board/common/rotpk/arm_rotpk_rsa_sha256.bin b/plat/arm/board/common/rotpk/arm_rotpk_rsa_sha256.bin
deleted file mode 100644
index 7653f7e..0000000
--- a/plat/arm/board/common/rotpk/arm_rotpk_rsa_sha256.bin
+++ /dev/null
@@ -1 +0,0 @@
-°ó‚	—Ø:7zrGì2sé’2âIYö^‹JJFØ"šÚ
\ No newline at end of file
diff --git a/plat/arm/board/common/rotpk/arm_rotprivk_rsa_3k.pem b/plat/arm/board/common/rotpk/arm_rotprivk_rsa_3k.pem
new file mode 100644
index 0000000..842979d
--- /dev/null
+++ b/plat/arm/board/common/rotpk/arm_rotprivk_rsa_3k.pem
@@ -0,0 +1,40 @@
+-----BEGIN PRIVATE KEY-----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++gfpNY49tiXomR1DX/k6nmyJyeG9eUVBGlmxERK72g/7OynYLK8o/7T3m8SUW5lq
+R5hZAoHBAMC0ZI36iq2m18xtEx84nrlipbRRRahIeb2bXziPBL3yEbomotwrabDl
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+GzuJu+Of0DNlt7FJsaWrOJeNqT0t1w0JiII3uEekmIC59740lyUJ2sVZlDq6Gf7i
+etV+7oqGn+aAmXgug0wszezMaYH8ZNjLgrxkxIsLSONQ8tUX3CYXglkqty0/JRVA
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+6POcpAU2Uy4kEyEgC6eJb+eYOzX8wvF+o2gtaPSVmvFiErFBd+42Wdn+wy72Ag5n
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+7Ndvfj0qAJ2JQSo0yhpGHsP1a1hX2WxhTCsRdz+wFzYitTnTrmnwVSqSN1lnOyzi
+yJKzgXhZA7xg5NVJeCCqKgL6vJkdw+L4F8+MV0GM8Dt25ieI2WTHBm9S0SA0lZa0
+8Ol99uQ8Q5rtDZCYQm6x1c7z0Z4gyi2GZY9EihzVymQ7GxRUmpBhhOhuLEBtGKB8
+MCdROw7EAN9wcKdoRfECgcB5zqNzKu2kbpa0oeHLLDpcOK1w9e7khN3/j3dTrpRw
+em8+HoCF54PoyfkPWANTHfg+Bs2gktgvUsxfLy0/DDBIRUBQXo6AyztfB34D5/3L
+QIPyPjSgQKxOCnUCcDAkvVRY+6J7W6J/pW385ZhzikCUrRSKrbc3UYEu3UZwypSC
+mJGKLUzhDhPYvIginpIugE9Pv3WXfKas3HRrk7UdqjIMpJxIRF5CULsEaZua6tje
+1oA5miNwoiXHcxPoo2qMtz8=
+-----END PRIVATE KEY-----
diff --git a/plat/arm/board/common/rotpk/arm_rotprivk_rsa_4k.pem b/plat/arm/board/common/rotpk/arm_rotprivk_rsa_4k.pem
new file mode 100644
index 0000000..2309ee6
--- /dev/null
+++ b/plat/arm/board/common/rotpk/arm_rotprivk_rsa_4k.pem
@@ -0,0 +1,52 @@
+-----BEGIN PRIVATE KEY-----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++UJU49UPHK2fTdqqouc5AoIBAQDmEqfyXQdf+5njZ3zx9cJFKRXB8SiFIDNZeSDL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+-----END PRIVATE KEY-----
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 2fd993c..73d96c5 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -382,12 +382,14 @@
 ifneq ($(filter 1,${MEASURED_BOOT} ${TRUSTED_BOARD_BOOT} ${DRTM_SUPPORT}),)
     PLAT_INCLUDES		+=	-Iplat/arm/common	\
 					-Iinclude/drivers/auth/mbedtls
-    # Specify mbed TLS configuration file
-    ifeq (${PSA_CRYPTO},1)
-      MBEDTLS_CONFIG_FILE	?=	"<plat_arm_psa_mbedtls_config.h>"
+    ifeq (${HASH_ALG}, sha512)
+      ARM_ROTPK_HASH_LEN	:=	64
+    else ifeq (${HASH_ALG}, sha384)
+      ARM_ROTPK_HASH_LEN	:=	48
     else
-      MBEDTLS_CONFIG_FILE	?=	"<plat_arm_mbedtls_config.h>"
+      ARM_ROTPK_HASH_LEN	:=	32
     endif
+    $(eval $(call add_define,ARM_ROTPK_HASH_LEN))
 endif
 
 ifneq (${TRUSTED_BOARD_BOOT},0)
diff --git a/plat/arm/common/plat_arm_mbedtls_config.h b/plat/arm/common/plat_arm_mbedtls_config.h
deleted file mode 100644
index c2db595..0000000
--- a/plat/arm/common/plat_arm_mbedtls_config.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright (c) 2024, Arm Ltd. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef PLAT_ARM_MBEDTLS_CONFIG_H
-#define PLAT_ARM_MBEDTLS_CONFIG_H
-
-#include <default_mbedtls_config.h>
-
-/**
- * On Arm platforms, the ROTPK is always hashed using the SHA-256
- * algorithm.
- * TODO: Update to hash the ROTPK with the selected HASH_ALG to avoid
- * the need for explicitly enabling the SHA-256 configuration in mbedTLS.
- */
-#define MBEDTLS_SHA256_C
-
-/*
- * Use an implementation of SHA-256 with a smaller memory footprint
- * but reduced speed.
- */
-#define MBEDTLS_SHA256_SMALLER
-
-#endif /* PLAT_ARM_MBEDTLS_CONFIG_H */
diff --git a/plat/arm/common/plat_arm_psa_mbedtls_config.h b/plat/arm/common/plat_arm_psa_mbedtls_config.h
deleted file mode 100644
index b7a4bf1..0000000
--- a/plat/arm/common/plat_arm_psa_mbedtls_config.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (c) 2024, Arm Ltd. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef PLAT_ARM_PSA_MBEDTLS_CONFIG_H
-#define PLAT_ARM_PSA_MBEDTLS_CONFIG_H
-
-#include "plat_arm_mbedtls_config.h"
-
-#define MBEDTLS_PSA_CRYPTO_C
-#define MBEDTLS_PSA_ASSUME_EXCLUSIVE_BUFFERS
-
-/*
- * Using PSA crypto API requires an RNG right now. If we don't define the macro
- * below then we get build errors.
- *
- * This is a functionality gap in mbedTLS. The technical limitation is that
- * psa_crypto_init() is all-or-nothing, and fixing that would require separate
- * initialization of the keystore, the RNG, etc.
- *
- * By defining MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG, we pretend using an external
- * RNG. As a result, the PSA crypto init code does nothing when it comes to
- * initializing the RNG, as we are supposed to take care of that ourselves.
- */
-#define MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG
-
-/*
- * Override heap size for PSA Crypto when RSA key size > 2048.
- */
-#if TF_MBEDTLS_USE_RSA && TF_MBEDTLS_KEY_SIZE > 2048
-#undef TF_MBEDTLS_HEAP_SIZE
-#define TF_MBEDTLS_HEAP_SIZE        U(12 * 1024)
-#endif
-
-#endif /* PLAT_ARM_PSA_MBEDTLS_CONFIG_H */