1#
2# Copyright (c) 2015-2021, 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