images: add HABv4 support for i.MX6
This patch adds high assurance boot support (HABv4) image generation to barebox, currently tested on i.MX6 only. In order to build a signed barebox image, add a new image target to images/Makefile.imx as illustrated in the diff below: - - - a/images/Makefile.imx + + + b/images/Makefile.imx @@ -163,10 +163,14 @@ image-$(CONFIG_MACH_SABRELITE) += barebox-freescale-imx6dl-sabrelite.img pblx-$(CONFIG_MACH_SABRESD) += start_imx6q_sabresd CFG_start_imx6q_sabresd.pblx.imximg = $(board)/freescale-mx6-sabresd/flash-header-mx6-sabresd.imxcfg FILE_barebox-freescale-imx6q-sabresd.img = start_imx6q_sabresd.pblx.imximg image-$(CONFIG_MACH_SABRESD) += barebox-freescale-imx6q-sabresd.img +CSF_start_imx6q_sabresd.pblx.imximg = $(havb4_imx6csf) +FILE_barebox-freescale-imx6q-sabresd-signed.img = start_imx6q_sabresd.pblx.imximg.signed +image-$(CONFIG_MACH_SABRESD) += barebox-freescale-imx6q-sabresd-signed.img + Here the default i.MX6 CSF file $(havb4_imx6csf) is used, it's generated during build on from the template "scripts/habv4/habv4-imx6.csf.in". You can configure the paths to the SRK table and certificates via: System Type -> i.MX specific settings -> HABv4 support. The proprietary tool "cst" by Freescale tool is expected in the PATH. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde
Sascha Hauer
parent
b6c786528b
commit
d3be1ab1fc
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@ -675,6 +675,46 @@ config IMX_OCOTP_WRITE
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mw -l -d /dev/imx-ocotp 0x8C 0x00001234
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mw -l -d /dev/imx-ocotp 0x88 0x56789ABC
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config HABV4
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tristate "HABv4 support"
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depends on ARCH_IMX6
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help
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High Assurance Boot, as found on i.MX28/i.MX6.
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if HABV4
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config HABV4_TABLE_BIN
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string "Path to SRK table"
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default "../crts/SRK_1_2_3_4_table.bin"
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help
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Path to the Super Root Key (SRK) table, produced by the
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Freescale Code Signing Tool (cst).
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This file will be inserted into the Command Sequence File
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(CSF) when using the CSF template that comes with barebox.
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config HABV4_CSF_CRT_PEM
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string "Path to CSF certificate"
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default "../crts/CSF1_1_sha256_4096_65537_v3_usr_crt.pem"
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help
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Path to the Command Sequence File (CSF) certificate, produced by the
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Freescale Public Key Infrastructure (PKI) script.
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This file will be inserted into the Command Sequence File
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(CSF) when using the CSF template that comes with barebox.
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config HABV4_IMG_CRT_PEM
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string "Path to IMG certificate"
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default "../crts/IMG_1_sha256_4096_65537_v3_usr_crt.pem"
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help
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Path to the Image certificate, produced by the Freescale
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Public Key Infrastructure (PKI) script.
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This file will be inserted into the Command Sequence File
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(CSF) when using the CSF template that comes with barebox.
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endif
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endmenu
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endif
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@ -3,6 +3,8 @@
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*.pblb
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*.img
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*.imximg
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*.imximg.prep
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*.imximg.signed
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*.map
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*.src
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*.kwbimg
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@ -102,11 +102,12 @@ objboard = $(objtree)/arch/$(ARCH)/boards
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include $(srctree)/images/Makefile.am33xx
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include $(srctree)/images/Makefile.imx
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include $(srctree)/images/Makefile.imxhabv4
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include $(srctree)/images/Makefile.mvebu
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include $(srctree)/images/Makefile.mxs
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include $(srctree)/images/Makefile.rockchip
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include $(srctree)/images/Makefile.socfpga
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include $(srctree)/images/Makefile.tegra
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include $(srctree)/images/Makefile.mxs
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targets += $(image-y) pbl.lds barebox.x barebox.z
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targets += $(patsubst %,%.pblx,$(pblx-y))
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@ -0,0 +1,48 @@
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# -*-makefile-*-
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#
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# barebox image generation Makefile for HABv4 images
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#
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# default csf templates
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havb4_imx6csf = $(srctree)/scripts/habv4/habv4-imx6.csf.in
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habv4_imx2csf = $(srctree)/scripts/habv4/habv4-imx28.csf.in
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# %.imximg.prep - Convert in i.MX image, with preparation for signature
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# ----------------------------------------------------------------
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quiet_cmd_imx_prep_image = IMX-PREP-IMG $@
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cmd_imx_prep_image = $(CPP) $(imxcfg_cpp_flags) -o $(imximg-tmp) $(word 2,$^) ; \
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$< -o $@ -b -c $(imximg-tmp) -p -f $(word 3,$^)
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.SECONDEXPANSION:
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$(obj)/%.imximg.prep: $(objtree)/scripts/imx/imx-image $$(CFG_%.imximg) $(obj)/%
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$(call if_changed,imx_prep_image)
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# %.habv4.csf - create Command Sequence File from template
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# ----------------------------------------------------------------
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quiet_cmd_csf = CSF $@
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cmd_csf = TABLE_BIN=$(CONFIG_HABV4_TABLE_BIN) \
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CSF_CRT_PEM=$(CONFIG_HABV4_CSF_CRT_PEM) \
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IMG_CRT_PEM=$(CONFIG_HABV4_IMG_CRT_PEM) \
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$< -f $(word 2,$^) -c $(word 3,$^) -i $(word 4,$^) -o $@
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.SECONDEXPANSION:
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$(obj)/%.habv4.csf: $(srctree)/scripts/habv4/gencsf.sh $(obj)/%.prep $$(CFG_%) $$(CSF_%)
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$(call if_changed,csf)
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# %.habv4.sig - create signature and pad to 0x2000
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# ----------------------------------------------------------------
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CST = cst
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quiet_cmd_habv4_sig = HAB4SIG $@
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cmd_habv4_sig = $(CST) -o $(imximg-tmp) < $(word 2,$^) > /dev/null; \
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$(OBJCOPY) -I binary -O binary --pad-to 0x2000 --gap-fill=0x5a $(imximg-tmp) $@
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$(obj)/%.habv4.sig: $(obj)/%.prep $(obj)/%.habv4.csf
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$(call if_changed,habv4_sig)
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# %.imximg.signed - concatenate bootloader and signature
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# ----------------------------------------------------------------
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quiet_cmd_cat = CAT $@
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cmd_cat = cat $^ > $@
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$(obj)/%.imximg.signed: $(obj)/%.imximg.prep $(obj)/%.imximg.habv4.sig
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$(call if_changed,cat)
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@ -0,0 +1,47 @@
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#!/bin/sh
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set -e
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while getopts "f:c:i:o:" opt; do
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case $opt in
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f)
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file=$OPTARG
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;;
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c)
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cfg=$OPTARG
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;;
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i)
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in=$OPTARG
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;;
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o)
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out=$OPTARG
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;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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exit 1
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;;
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esac
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done
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if [ ! -e $file -o ! -e $cfg -o ! -e $in ]; then
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echo "file not found!"
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exit 1
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fi
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#
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# extract and set as shell vars:
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# loadaddr=
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# dcdofs=
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#
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eval $(sed -n -e "s/^[[:space:]]*\(loadaddr\|dcdofs\)[[:space:]]*\(0x[0-9]*\)/\1=\2/p" $cfg)
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length=$(stat -c '%s' $file)
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sed -e "s:@TABLE_BIN@:$TABLE_BIN:" \
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-e "s:@CSF_CRT_PEM@:$CSF_CRT_PEM:" \
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-e "s:@IMG_CRT_PEM@:$IMG_CRT_PEM:" \
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-e "s:@LOADADDR@:$loadaddr:" \
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-e "s:@OFFSET@:0:" \
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-e "s:@LENGTH@:$length:" \
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-e "s:@FILE@:$file:" \
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$in > $out
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@ -0,0 +1,33 @@
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[Header]
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Version = 4.0
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Hash Algorithm = sha256
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Engine Configuration = 0
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Certificate Format = X509
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Signature Format = CMS
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Engine = DCP
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[Install SRK]
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File = "@TABLE_BIN@"
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# SRK index within SRK-Table 0..3
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Source index = 0
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[Install CSFK]
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File = "@CSF_CRT_PEM@"
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[Authenticate CSF]
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[Install Key]
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# verification key index in key store (0, 2...5)
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Verification index = 0
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# target key index in key store (2...5)
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Target index = 2
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File = "@IMG_CRT_PEM@"
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[Authenticate Data]
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# verification key index in key store (2...5)
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Verification index = 2
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# "starting load address in memory"
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# "starting offset within the source file"
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# "length (in bytes)"
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# "file (binary)"
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Blocks = @LOADADDR@ @OFFSET@ @LENGTH@ "@FILE@"
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@ -0,0 +1,37 @@
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[Header]
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Version = 4.1
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Hash Algorithm = sha256
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Engine Configuration = 0
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Certificate Format = X509
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Signature Format = CMS
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Engine = CAAM
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[Install SRK]
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File = "@TABLE_BIN@"
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# SRK index within SRK-Table 0..3
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Source index = 0
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[Install CSFK]
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File = "@CSF_CRT_PEM@"
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[Authenticate CSF]
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[Unlock]
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Engine = CAAM
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Features = RNG
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[Install Key]
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# verification key index in key store (0, 2...5)
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Verification index = 0
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# target key index in key store (2...5)
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Target index = 2
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File = "@IMG_CRT_PEM@"
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[Authenticate Data]
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# verification key index in key store (2...5)
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Verification index = 2
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# "starting load address in memory"
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# "starting offset within the source file"
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# "length (in bytes)"
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# "file (binary)"
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Blocks = @LOADADDR@ @OFFSET@ @LENGTH@ "@FILE@"
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