1#
2# Copyright (c) 2015-2023, 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_BL2: indicates whether BL2 is needed by the platform
15#   NEED_BL32: indicates whether BL32 is needed by the platform
16#   BL2: image filename (optional). Default is IMG_BIN(2) (see macro IMG_BIN)
17#   SCP_BL2: image filename (optional). Default is IMG_BIN(30)
18#   BL31: image filename (optional). Default is IMG_BIN(31)
19#   BL32: image filename (optional). Default is IMG_BIN(32)
20#   BL33: image filename (optional). Default is IMG_BIN(33)
21#
22# Build options added by this file:
23#
24#   KEY_ALG
25#   KEY_SIZE
26#   ROT_KEY
27#   PROT_KEY
28#   PLAT_KEY
29#   SWD_ROT_KEY
30#   CORE_SWD_KEY
31#   TRUSTED_WORLD_KEY
32#   NON_TRUSTED_WORLD_KEY
33#   SCP_BL2_KEY
34#   BL31_KEY
35#   BL32_KEY
36#   BL33_KEY
37#
38
39# Certificate generation tool default parameters
40TRUSTED_KEY_CERT	?=	${BUILD_PLAT}/trusted_key.crt
41FWU_CERT		:=	${BUILD_PLAT}/fwu_cert.crt
42
43# Default non-volatile counter values (overridable by the platform)
44TFW_NVCTR_VAL		?=	0
45NTFW_NVCTR_VAL		?=	0
46
47# Pass the non-volatile counters to the cert_create tool
48$(eval $(call CERT_ADD_CMD_OPT,${TFW_NVCTR_VAL},--tfw-nvctr))
49$(eval $(call CERT_ADD_CMD_OPT,${NTFW_NVCTR_VAL},--ntfw-nvctr))
50
51# Add Trusted Key certificate to the fiptool and cert_create command line options
52ifneq (${COT},cca)
53$(eval $(call TOOL_ADD_PAYLOAD,${TRUSTED_KEY_CERT},--trusted-key-cert))
54else
55$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/cca.crt,--cca-cert))
56$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/core-swd.crt,--core-swd-cert))
57$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/plat-key.crt,--plat-key-cert))
58endif
59
60# Add fwu certificate to the fiptool and cert_create command line options
61ifneq (${COT},cca)
62$(eval $(call TOOL_ADD_PAYLOAD,${FWU_CERT},--fwu-cert,,FWU_))
63endif
64
65# Add the keys to the cert_create command line options (private keys are NOT
66# packed in the FIP). Developers can use their own keys by specifying the proper
67# build option in the command line when building the Trusted Firmware
68$(if ${KEY_ALG},$(eval $(call CERT_ADD_CMD_OPT,${KEY_ALG},--key-alg)))
69$(if ${KEY_ALG},$(eval $(call CERT_ADD_CMD_OPT,${KEY_ALG},--key-alg,FWU_)))
70$(if ${KEY_SIZE},$(eval $(call CERT_ADD_CMD_OPT,${KEY_SIZE},--key-size)))
71$(if ${KEY_SIZE},$(eval $(call CERT_ADD_CMD_OPT,${KEY_SIZE},--key-size,FWU_)))
72$(if ${HASH_ALG},$(eval $(call CERT_ADD_CMD_OPT,${HASH_ALG},--hash-alg)))
73$(if ${HASH_ALG},$(eval $(call CERT_ADD_CMD_OPT,${HASH_ALG},--hash-alg,FWU_)))
74$(if ${ROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${ROT_KEY},--rot-key)))
75$(if ${ROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${ROT_KEY},--rot-key,FWU_)))
76$(if ${PROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${PROT_KEY},--prot-key)))
77$(if ${PLAT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${PLAT_KEY},--plat-key)))
78$(if ${SWD_ROT_KEY},$(eval $(call CERT_ADD_CMD_OPT,${SWD_ROT_KEY},--swd-rot-key)))
79$(if ${CORE_SWD_KEY},$(eval $(call CERT_ADD_CMD_OPT,${CORE_SWD_KEY},--core-swd-key)))
80$(if ${TRUSTED_WORLD_KEY},$(eval $(call CERT_ADD_CMD_OPT,${TRUSTED_WORLD_KEY},--trusted-world-key)))
81$(if ${NON_TRUSTED_WORLD_KEY},$(eval $(call CERT_ADD_CMD_OPT,${NON_TRUSTED_WORLD_KEY},--non-trusted-world-key)))
82
83
84# Add the BL2 CoT (image cert)
85ifeq (${NEED_BL2},yes)
86ifeq (${RESET_TO_BL2}, 0)
87ifneq (${COT},cca)
88$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tb_fw.crt,--tb-fw-cert))
89endif
90endif
91endif
92
93# Add the SCP_BL2 CoT (key cert + img cert)
94ifneq (${SCP_BL2},)
95ifneq (${COT},cca)
96    $(if ${SCP_BL2_KEY},$(eval $(call CERT_ADD_CMD_OPT,${SCP_BL2_KEY},--scp-fw-key)))
97    $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/scp_fw_content.crt,--scp-fw-cert))
98    $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/scp_fw_key.crt,--scp-fw-key-cert))
99endif
100endif
101
102ifeq (${ARCH},aarch64)
103ifeq (${NEED_BL31},yes)
104# Add the BL31 CoT (key cert + img cert)
105$(if ${BL31_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL31_KEY},--soc-fw-key)))
106ifneq (${COT},cca)
107$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/soc_fw_content.crt,--soc-fw-cert))
108$(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/soc_fw_key.crt,--soc-fw-key-cert))
109endif
110endif
111endif
112
113# Add the BL32 CoT (key cert + img cert)
114ifeq (${NEED_BL32},yes)
115    $(if ${BL32_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL32_KEY},--tos-fw-key)))
116    $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tos_fw_content.crt,--tos-fw-cert))
117    $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/tos_fw_key.crt,--tos-fw-key-cert))
118endif
119
120# Add the BL33 CoT (key cert + img cert)
121ifneq (${BL33},)
122    $(if ${BL33_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL33_KEY},--nt-fw-key)))
123    $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/nt_fw_content.crt,--nt-fw-cert))
124ifneq (${COT},dualroot)
125    ifneq (${COT},cca)
126        $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/nt_fw_key.crt,--nt-fw-key-cert))
127    endif
128endif
129endif
130
131# Add SiP owned Secure Partitions CoT (image cert)
132ifneq (${SP_LAYOUT_FILE},)
133    $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/sip_sp_content.crt,--sip-sp-cert))
134ifeq (${COT},dualroot)
135    $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/plat_sp_content.crt,--plat-sp-cert))
136endif
137ifeq (${COT},cca)
138    $(eval $(call TOOL_ADD_PAYLOAD,${BUILD_PLAT}/plat_sp_content.crt,--plat-sp-cert))
139endif
140endif
141