tools: k3_get_x509 cert: Add a script to generate x509 certificate for K3 devices
TI's K3 boot architecture mandates a x509 certificate for every boot image. While signing the image K3 ROM allows for two types of keys based on which the boot image gets loaded in different ways: - Degenerate RSA keys: This generates a signature which is equal to the digest. When ROM sees this, it does a DMA for copying the images, which significantly improves the boot time. - Any other key: Does a memcpy to load the image. This is introduced as a fallback for DMA copy. Add a script for generating boot images with the above options. Default generates image using rsa degenerate key in order to improve boot time. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
This commit is contained in:
Lokesh Vutla
Tom Rini
parent
878e2a50b5
commit
ca71186a76
244
tools/k3_gen_x509_cert.sh
Executable file
244
tools/k3_gen_x509_cert.sh
Executable file
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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#
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# Script to add K3 specific x509 cetificate to a binary.
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#
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# Variables
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OUTPUT=tiboot3.bin
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TEMP_X509=x509-temp.cert
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CERT=certificate.bin
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RAND_KEY=eckey.pem
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LOADADDR=0x41c00000
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BOOTCORE_OPTS=0
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BOOTCORE=16
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gen_degen_template() {
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cat << 'EOF' > degen-template.txt
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asn1=SEQUENCE:rsa_key
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[rsa_key]
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version=INTEGER:0
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modulus=INTEGER:0xDEGEN_MODULUS
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pubExp=INTEGER:1
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privExp=INTEGER:1
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p=INTEGER:0xDEGEN_P
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q=INTEGER:0xDEGEN_Q
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e1=INTEGER:1
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e2=INTEGER:1
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coeff=INTEGER:0xDEGEN_COEFF
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EOF
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}
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# Generate x509 Template
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gen_template() {
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cat << 'EOF' > x509-template.txt
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[ req ]
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distinguished_name = req_distinguished_name
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x509_extensions = v3_ca
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prompt = no
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dirstring_type = nobmp
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[ req_distinguished_name ]
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C = US
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ST = TX
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L = Dallas
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O = Texas Instruments Incorporated
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OU = Processors
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CN = TI support
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emailAddress = support@ti.com
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[ v3_ca ]
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basicConstraints = CA:true
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1.3.6.1.4.1.294.1.1 = ASN1:SEQUENCE:boot_seq
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1.3.6.1.4.1.294.1.2 = ASN1:SEQUENCE:image_integrity
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1.3.6.1.4.1.294.1.3 = ASN1:SEQUENCE:swrv
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# 1.3.6.1.4.1.294.1.4 = ASN1:SEQUENCE:encryption
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1.3.6.1.4.1.294.1.8 = ASN1:SEQUENCE:debug
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[ boot_seq ]
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certType = INTEGER:TEST_CERT_TYPE
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bootCore = INTEGER:TEST_BOOT_CORE
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bootCoreOpts = INTEGER:TEST_BOOT_CORE_OPTS
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destAddr = FORMAT:HEX,OCT:TEST_BOOT_ADDR
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imageSize = INTEGER:TEST_IMAGE_LENGTH
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[ image_integrity ]
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shaType = OID:2.16.840.1.101.3.4.2.3
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shaValue = FORMAT:HEX,OCT:TEST_IMAGE_SHA_VAL
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[ swrv ]
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swrv = INTEGER:0
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# [ encryption ]
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# initalVector = FORMAT:HEX,OCT:TEST_IMAGE_ENC_IV
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# randomString = FORMAT:HEX,OCT:TEST_IMAGE_ENC_RS
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# iterationCnt = INTEGER:TEST_IMAGE_KEY_DERIVE_INDEX
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# salt = FORMAT:HEX,OCT:TEST_IMAGE_KEY_DERIVE_SALT
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[ debug ]
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debugUID = FORMAT:HEX,OCT:0000000000000000000000000000000000000000000000000000000000000000
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debugType = INTEGER:4
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coreDbgEn = INTEGER:0
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coreDbgSecEn = INTEGER:0
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EOF
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}
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parse_key() {
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sed '/\ \ \ \ /s/://g' key.txt | awk '!/\ \ \ \ / {printf("\n%s\n", $0)}; /\ \ \ \ / {printf("%s", $0)}' | sed 's/\ \ \ \ //g' | awk "/$1:/{getline; print}"
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}
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gen_degen_key() {
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# Generate a 4096 bit RSA Key
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openssl genrsa -out key.pem 1024 >>/dev/null 2>&1
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openssl rsa -in key.pem -text -out key.txt >>/dev/null 2>&1
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DEGEN_MODULUS=$( parse_key 'modulus' )
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DEGEN_P=$( parse_key 'prime1' )
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DEGEN_Q=$( parse_key 'prime2' )
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DEGEN_COEFF=$( parse_key 'coefficient' )
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gen_degen_template
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sed -e "s/DEGEN_MODULUS/$DEGEN_MODULUS/"\
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-e "s/DEGEN_P/$DEGEN_P/" \
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-e "s/DEGEN_Q/$DEGEN_Q/" \
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-e "s/DEGEN_COEFF/$DEGEN_COEFF/" \
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degen-template.txt > degenerateKey.txt
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openssl asn1parse -genconf degenerateKey.txt -out degenerateKey.der >>/dev/null 2>&1
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openssl rsa -in degenerateKey.der -inform DER -outform PEM -out $RAND_KEY >>/dev/null 2>&1
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KEY=$RAND_KEY
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rm key.pem key.txt degen-template.txt degenerateKey.txt degenerateKey.der
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}
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declare -A options_help
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usage() {
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if [ -n "$*" ]; then
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echo "ERROR: $*"
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fi
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echo -n "Usage: $0 "
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for option in "${!options_help[@]}"
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do
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arg=`echo ${options_help[$option]}|cut -d ':' -f1`
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if [ -n "$arg" ]; then
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arg=" $arg"
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fi
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echo -n "[-$option$arg] "
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done
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echo
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echo -e "\nWhere:"
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for option in "${!options_help[@]}"
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do
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arg=`echo ${options_help[$option]}|cut -d ':' -f1`
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txt=`echo ${options_help[$option]}|cut -d ':' -f2`
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tb="\t\t\t"
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if [ -n "$arg" ]; then
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arg=" $arg"
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tb="\t"
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fi
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echo -e " -$option$arg:$tb$txt"
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done
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echo
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echo "Examples of usage:-"
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echo "# Example of signing the SYSFW binary with rsa degenerate key"
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echo " $0 -c 0 -b ti-sci-firmware-am6x.bin -o sysfw.bin -l 0x40000"
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echo "# Example of signing the SPL binary with rsa degenerate key"
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echo " $0 -c 16 -b spl/u-boot-spl.bin -o tiboot3.bin -l 0x41c00000"
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}
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options_help[b]="bin_file:Bin file that needs to be signed"
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options_help[k]="key_file:file with key inside it. If not provided script generates a rsa degenerate key."
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options_help[o]="output_file:Name of the final output file. default to $OUTPUT"
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options_help[c]="core_id:target core id on which the image would be running. Default to $BOOTCORE"
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options_help[l]="loadaddr: Target load address of the binary in hex. Default to $LOADADDR"
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while getopts "b:k:o:c:l:h" opt
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do
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case $opt in
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b)
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BIN=$OPTARG
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;;
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k)
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KEY=$OPTARG
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;;
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o)
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OUTPUT=$OPTARG
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;;
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l)
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LOADADDR=$OPTARG
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;;
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c)
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BOOTCORE=$OPTARG
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;;
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h)
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usage
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exit 0
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;;
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\?)
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usage "Invalid Option '-$OPTARG'"
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exit 1
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;;
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:)
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usage "Option '-$OPTARG' Needs an argument."
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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 [ "$#" -eq 0 ]; then
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usage "Arguments missing"
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exit 1
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fi
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if [ -z "$BIN" ]; then
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usage "Bin file missing in arguments"
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exit 1
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fi
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# Generate rsa degenerate key if user doesn't provide a key
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if [ -z "$KEY" ]; then
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gen_degen_key
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fi
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if [ $BOOTCORE == 0 ]; then # BOOTCORE M3, loaded by ROM
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CERTTYPE=2
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elif [ $BOOTCORE == 16 ]; then # BOOTCORE R5, loaded by ROM
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CERTTYPE=1
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else # Non BOOTCORE, loaded by SYSFW
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BOOTCORE_OPTS_VER=$(printf "%01x" 1)
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# Add input args option for SET and CLR flags.
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BOOTCORE_OPTS_SETFLAG=$(printf "%08x" 0)
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BOOTCORE_OPTS_CLRFLAG=$(printf "%08x" 0x100) # Clear FLAG_ARMV8_AARCH32
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BOOTCORE_OPTS="0x$BOOTCORE_OPTS_VER$BOOTCORE_OPTS_SETFLAG$BOOTCORE_OPTS_CLRFLAG"
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# Set the cert type to zero.
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# We are not using public/private key store now
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CERTTYPE=$(printf "0x%08x" 0)
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fi
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SHA_VAL=`openssl dgst -sha512 -hex $BIN | sed -e "s/^.*= //g"`
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BIN_SIZE=`cat $BIN | wc -c`
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ADDR=`printf "%08x" $LOADADDR`
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gen_cert() {
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#echo "Certificate being generated :"
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#echo " LOADADDR = 0x$ADDR"
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#echo " IMAGE_SIZE = $BIN_SIZE"
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#echo " CERT_TYPE = $CERTTYPE"
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sed -e "s/TEST_IMAGE_LENGTH/$BIN_SIZE/" \
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-e "s/TEST_IMAGE_SHA_VAL/$SHA_VAL/" \
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-e "s/TEST_CERT_TYPE/$CERTTYPE/" \
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-e "s/TEST_BOOT_CORE_OPTS/$BOOTCORE_OPTS/" \
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-e "s/TEST_BOOT_CORE/$BOOTCORE/" \
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-e "s/TEST_BOOT_ADDR/$ADDR/" x509-template.txt > $TEMP_X509
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openssl req -new -x509 -key $KEY -nodes -outform DER -out $CERT -config $TEMP_X509 -sha512
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}
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gen_template
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gen_cert
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cat $CERT $BIN > $OUTPUT
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# Remove all intermediate files
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rm $TEMP_X509 $CERT x509-template.txt
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if [ "$KEY" == "$RAND_KEY" ]; then
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rm $RAND_KEY
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fi
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