Adds option to read ROTPK from registers for FVP
Enables usage of ARM_ROTPK_LOCATION=regs for FVP board.
Removes hard-coded developer keys. Instead, setting
ARM_ROTPK_LOCATION=devel_* takes keys from default directory.
In case of ROT_KEY specified - generates a new hash and replaces the
original.
Note: Juno board was tested by original feature author and was not tested
for this patch since we don't have access to the private key. Juno
implementation was moved to board-specific file without changing
functionality. It is not known whether byte-swapping is still needed
for this platform.
Change-Id: I0fdbaca0415cdcd78f3a388551c2e478c01ed986
Signed-off-by: Max Shvetsov <maksims.svecovs@arm.com>
diff --git a/plat/arm/board/sgm775/platform.mk b/plat/arm/board/sgm775/platform.mk
index 7a843c3..f096ca5 100644
--- a/plat/arm/board/sgm775/platform.mk
+++ b/plat/arm/board/sgm775/platform.mk
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@@ -21,3 +21,8 @@
BL31_SOURCES += drivers/cfi/v2m/v2m_flash.c \
lib/utils/mem_region.c \
plat/arm/common/arm_nor_psci_mem_protect.c
+
+ifeq (${TRUSTED_BOARD_BOOT}, 1)
+BL1_SOURCES += ${SGM775_BASE}/sgm775_trusted_boot.c
+BL2_SOURCES += ${SGM775_BASE}/sgm775_trusted_boot.c
+endif
diff --git a/plat/arm/board/sgm775/sgm775_trusted_boot.c b/plat/arm/board/sgm775/sgm775_trusted_boot.c
new file mode 100644
index 0000000..c271f7f
--- /dev/null
+++ b/plat/arm/board/sgm775/sgm775_trusted_boot.c
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2020, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <plat/arm/common/plat_arm.h>
+
+/*
+ * Return the ROTPK hash in the following ASN.1 structure in DER format:
+ *
+ * AlgorithmIdentifier ::= SEQUENCE {
+ * algorithm OBJECT IDENTIFIER,
+ * parameters ANY DEFINED BY algorithm OPTIONAL
+ * }
+ *
+ * DigestInfo ::= SEQUENCE {
+ * digestAlgorithm AlgorithmIdentifier,
+ * digest OCTET STRING
+ * }
+ */
+int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
+ unsigned int *flags)
+{
+ return arm_get_rotpk_info(key_ptr, key_len, flags);
+}