1# 2# Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. 3# 4# SPDX-License-Identifier: BSD-3-Clause 5# 6 7# This file defines the keys and certificates that must be created to establish 8# a Chain of Trust following the TBBR document. These definitions include the 9# command line options passed to the cert_create and fiptool commands. 10# 11# Expected environment: 12# 13# BUILD_PLAT: output directory 14# NEED_BL32: indicates whether BL32 is needed by the platform 15# BL2: image filename (optional). Default is IMG_BIN(2) (see macro IMG_BIN) 16# SCP_BL2: image filename (optional). Default is IMG_BIN(30) 17# BL31: image filename (optional). Default is IMG_BIN(31) 18# BL32: image filename (optional). Default is IMG_BIN(32) 19# BL33: image filename (optional). Default is IMG_BIN(33) 20# 21# Build options added by this file: 22# 23# KEY_ALG 24# KEY_SIZE 25# ROT_KEY 26# TRUSTED_WORLD_KEY 27# NON_TRUSTED_WORLD_KEY 28# SCP_BL2_KEY 29# BL31_KEY 30# BL32_KEY 31# BL33_KEY 32# 33 34# Certificate generation tool default parameters 35TRUSTED_KEY_CERT := ${BUILD_PLAT}/trusted_key.crt 36FWU_CERT := ${BUILD_PLAT}/fwu_cert.crt 37 38# Default non-volatile counter values (overridable by the platform) 39TFW_NVCTR_VAL ?= 0 40NTFW_NVCTR_VAL ?= 0 41 42# Pass the non-volatile counters to the cert_create tool 43$(eval $(call CERT_ADD_CMD_OPT,${TFW_NVCTR_VAL},--tfw-nvctr)) 44$(eval $(call CERT_ADD_CMD_OPT,${NTFW_NVCTR_VAL},--ntfw-nvctr)) 45 46# Add Trusted Key certificate to the fiptool and cert_create command line options 47$(eval $(call TOOL_ADD_PAYLOAD,${TRUSTED_KEY_CERT},--trusted-key-cert)) 48 49# Add fwu certificate to the fiptool and cert_create command line options 50$(eval $(call TOOL_ADD_PAYLOAD,${FWU_CERT},--fwu-cert,,FWU_)) 51 52# Add the keys to the cert_create command line options (private keys are NOT 53# packed in the FIP). Developers can use their own keys by specifying the proper 54# build option in the command line when building the Trusted Firmware 55$(if ${KEY_ALG},$(eval $(call CERT_ADD_CMD_OPT,${KEY_ALG},--key-alg))) 56$(if ${KEY_SIZE},$(eval $(call CERT_ADD_CMD_OPT,${KEY_SIZE},--key-size))) 57$(if ${HASH_ALG},$(eval $(call CERT_ADD_CMD_OPT,${HASH_ALG},--hash-alg))) 58$(if ${ROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${ROT_KEY},--rot-key))) 59$(if ${ROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${ROT_KEY},--rot-key,FWU_))) 60$(if ${TRUSTED_WORLD_KEY},$(eval $(call CERT_ADD_CMD_OPT,${TRUSTED_WORLD_KEY},--trusted-world-key))) 61$(if ${NON_TRUSTED_WORLD_KEY},$(eval $(call CERT_ADD_CMD_OPT,${NON_TRUSTED_WORLD_KEY},--non-trusted-world-key))) 62 63 64# Add the BL2 CoT (image cert) 65ifeq (${BL2_AT_EL3}, 0) 66$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tb_fw.crt,--tb-fw-cert)) 67endif 68 69# Add the SCP_BL2 CoT (key cert + img cert) 70ifneq (${SCP_BL2},) 71 $(if ${SCP_BL2_KEY},$(eval $(call CERT_ADD_CMD_OPT,${SCP_BL2_KEY},--scp-fw-key))) 72 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/scp_fw_content.crt,--scp-fw-cert)) 73 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/scp_fw_key.crt,--scp-fw-key-cert)) 74endif 75 76ifeq (${ARCH},aarch64) 77ifeq (${NEED_BL31},yes) 78# Add the BL31 CoT (key cert + img cert) 79$(if ${BL31_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL31_KEY},--soc-fw-key))) 80$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/soc_fw_content.crt,--soc-fw-cert)) 81$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/soc_fw_key.crt,--soc-fw-key-cert)) 82endif 83endif 84 85# Add the BL32 CoT (key cert + img cert) 86ifeq (${NEED_BL32},yes) 87 $(if ${BL32_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL32_KEY},--tos-fw-key))) 88 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tos_fw_content.crt,--tos-fw-cert)) 89 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tos_fw_key.crt,--tos-fw-key-cert)) 90endif 91 92# Add the BL33 CoT (key cert + img cert) 93ifneq (${BL33},) 94 $(if ${BL33_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL33_KEY},--nt-fw-key))) 95 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/nt_fw_content.crt,--nt-fw-cert)) 96 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/nt_fw_key.crt,--nt-fw-key-cert)) 97endif 98