1# 2# Copyright (c) 2015-2020, 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# PROT_KEY 27# TRUSTED_WORLD_KEY 28# NON_TRUSTED_WORLD_KEY 29# SCP_BL2_KEY 30# BL31_KEY 31# BL32_KEY 32# BL33_KEY 33# 34 35# Certificate generation tool default parameters 36TRUSTED_KEY_CERT := ${BUILD_PLAT}/trusted_key.crt 37FWU_CERT := ${BUILD_PLAT}/fwu_cert.crt 38 39# Default non-volatile counter values (overridable by the platform) 40TFW_NVCTR_VAL ?= 0 41NTFW_NVCTR_VAL ?= 0 42 43# Pass the non-volatile counters to the cert_create tool 44$(eval $(call CERT_ADD_CMD_OPT,${TFW_NVCTR_VAL},--tfw-nvctr)) 45$(eval $(call CERT_ADD_CMD_OPT,${NTFW_NVCTR_VAL},--ntfw-nvctr)) 46 47# Add Trusted Key certificate to the fiptool and cert_create command line options 48$(eval $(call TOOL_ADD_PAYLOAD,${TRUSTED_KEY_CERT},--trusted-key-cert)) 49 50# Add fwu certificate to the fiptool and cert_create command line options 51$(eval $(call TOOL_ADD_PAYLOAD,${FWU_CERT},--fwu-cert,,FWU_)) 52 53# Add the keys to the cert_create command line options (private keys are NOT 54# packed in the FIP). Developers can use their own keys by specifying the proper 55# build option in the command line when building the Trusted Firmware 56$(if ${KEY_ALG},$(eval $(call CERT_ADD_CMD_OPT,${KEY_ALG},--key-alg))) 57$(if ${KEY_ALG},$(eval $(call CERT_ADD_CMD_OPT,${KEY_ALG},--key-alg,FWU_))) 58$(if ${KEY_SIZE},$(eval $(call CERT_ADD_CMD_OPT,${KEY_SIZE},--key-size))) 59$(if ${KEY_SIZE},$(eval $(call CERT_ADD_CMD_OPT,${KEY_SIZE},--key-size,FWU_))) 60$(if ${HASH_ALG},$(eval $(call CERT_ADD_CMD_OPT,${HASH_ALG},--hash-alg))) 61$(if ${HASH_ALG},$(eval $(call CERT_ADD_CMD_OPT,${HASH_ALG},--hash-alg,FWU_))) 62$(if ${ROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${ROT_KEY},--rot-key))) 63$(if ${ROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${ROT_KEY},--rot-key,FWU_))) 64$(if ${PROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${PROT_KEY},--prot-key))) 65$(if ${TRUSTED_WORLD_KEY},$(eval $(call CERT_ADD_CMD_OPT,${TRUSTED_WORLD_KEY},--trusted-world-key))) 66$(if ${NON_TRUSTED_WORLD_KEY},$(eval $(call CERT_ADD_CMD_OPT,${NON_TRUSTED_WORLD_KEY},--non-trusted-world-key))) 67 68 69# Add the BL2 CoT (image cert) 70ifeq (${BL2_AT_EL3}, 0) 71$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tb_fw.crt,--tb-fw-cert)) 72endif 73 74# Add the SCP_BL2 CoT (key cert + img cert) 75ifneq (${SCP_BL2},) 76 $(if ${SCP_BL2_KEY},$(eval $(call CERT_ADD_CMD_OPT,${SCP_BL2_KEY},--scp-fw-key))) 77 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/scp_fw_content.crt,--scp-fw-cert)) 78 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/scp_fw_key.crt,--scp-fw-key-cert)) 79endif 80 81ifeq (${ARCH},aarch64) 82ifeq (${NEED_BL31},yes) 83# Add the BL31 CoT (key cert + img cert) 84$(if ${BL31_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL31_KEY},--soc-fw-key))) 85$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/soc_fw_content.crt,--soc-fw-cert)) 86$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/soc_fw_key.crt,--soc-fw-key-cert)) 87endif 88endif 89 90# Add the BL32 CoT (key cert + img cert) 91ifeq (${NEED_BL32},yes) 92 $(if ${BL32_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL32_KEY},--tos-fw-key))) 93 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tos_fw_content.crt,--tos-fw-cert)) 94 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tos_fw_key.crt,--tos-fw-key-cert)) 95endif 96 97# Add the BL33 CoT (key cert + img cert) 98ifneq (${BL33},) 99 $(if ${BL33_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL33_KEY},--nt-fw-key))) 100 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/nt_fw_content.crt,--nt-fw-cert)) 101ifneq (${COT},dualroot) 102 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/nt_fw_key.crt,--nt-fw-key-cert)) 103endif 104endif 105 106# Add SiP owned Secure Partitions CoT (image cert) 107ifneq (${SP_LAYOUT_FILE},) 108 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/sip_sp_content.crt,--sip-sp-cert)) 109ifeq (${COT},dualroot) 110 $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/plat_sp_content.crt,--plat-sp-cert)) 111endif 112endif 113