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bfsbverify
executable file
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bfsbverify
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#! /bin/sh
# Copyright (c) 2022 NVIDIA Corporation. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and documentation are those
# of the authors and should not be interpreted as representing official policies,
# either expressed or implied, of the FreeBSD Project.
set -e
##############################################################################
##############################################################################
##
## Script parameters
##
##############################################################################
##############################################################################
##
## This script requires a standard shell/bash environment with
## 'openssl', 'mlx-mkbfb', 'mlxbf-bootctl' and other basic shell
## commands.
##
## This script might also rely on environement variables to be setup
## prior to the execution of the script:
##
## env [VARIABLE0=VALUE] [VARIABLE1=VALUE] ... <script> <params>
##
## Environement Variables:
##
## MKBFB_PATH Path to the mlx-mkbfb command.
## BFBOOTCTL_PATH Path to the mlxbf-bootctl command.
## SCRATCH_PATH Path to temporary scratch directory.
## DEBUG_ENABLE If set to 1, debug prints are enabled.
##
# Default tools setup
mkbfb=${MKBFB_PATH:-mlx-mkbfb}
mlxbfbootctl=${BFBOOTCTL_PATH:-mlxbf-bootctl}
# Default debug setup
debug=${DEBUG_ENABLE:-}
scratch=${SCRATCH_PATH:-/tmp}
tmpdir=$(mktemp -d $scratch/bfbtmp-${USER}.XXXXXXXXXXXX)
# Trap to delete the temorary folder upon the specified
# signal is caught.
trap "rm -rf $tmpdir" HUP INT QUIT ABRT TERM KILL STOP
##############################################################################
##############################################################################
##
## Parse script arguments
##
##############################################################################
##############################################################################
PROGNAME=$(basename "$0")
usage()
{
cat <<EOF
Usage: $PROGNAME [-h|--help]
[-k|--rotpk ROTPK]
[-v|--version VERSION]
[-s|--skip-cot]
[-b|--bfb BFB]
[-d|--dev DEV]
Verify the BFB certificate chain. To learn about supported options
run the command with '--help'.
Manadatory arguments:
-b|--bfb The input BFB file to verify.
-d|--dev The eMMC boot partition device to verify.
(e.g., /dev/mmcblk0boot0, /dev/mmcblk0boot1)
'-b|--bfb' and '-d|--dev' cannot be combined together.
Optional argument
-h|--help Print help.
-k|--rotpk The ROT public key in DER format.
-v|--version The input BFB file target version.
1: BlueField 2 file version (default)
2: BlueField 3 file version.
-s|--skip-cot Skip COT verification.
EOF
}
rotpk=
inbfb=
version=1
skip_cot_verify=
device=
PARSED_OPTIONS=$(getopt -n "$PROGNAME" -o hk:b:sv:d: \
-l help,rotpk:,bfb:,skip-cot,version:,dev: -- "$@")
eval set -- "$PARSED_OPTIONS"
while true
do
case $1 in
-h | --help)
usage
exit 0
;;
-b | --bfb)
inbfb=$(readlink -f "$2")
shift 2
;;
-d | --dev)
device=$2
shift 2
;;
-k | --rotpk)
rotpk=$(readlink -f "$2")
shift 2
;;
-v | --version)
version=$2
shift 2
;;
-s | --skip-cot)
skip_cot_verify=1
shift
;;
--)
shift
break
;;
esac
done
#
# Verify Script Arguments
#
if [ -z "$inbfb" ] && [ -z "$device" ]; then
echo "** error: '-b|--bfb' or '-d|--dev' must be specified."
echo "Try \"help\"."
exit 1
fi
if [ -n "$inbfb" ] && [ -n "$device" ]; then
echo "** error: use either '-b|--bfb' or '-d|--dev'."
echo "Try \"help\"."
exit 1
fi
if [ -n "$inbfb" ] && [ ! -f "$inbfb" ]; then
echo "** error: bad argument passed with '-b|--bfb'."
echo "Try \"help\"."
exit 1
fi
if [ -n "$device" ] && [ ! -b "$device" ]; then
echo "** error: bad argument passed with '-d|--dev'."
echo "Try \"help\"."
exit 1
fi
if [ -n "$rotpk" ] && [ ! -f "$rotpk" ]; then
echo "** error: missing '--rotpk' argument."
echo "Try \"help\"."
exit 1
fi
if [ "$version" != "1" ] && [ "$version" != "2" ]; then
echo "** error: bad version number."
echo "Try \"help\"."
exit 1
fi
##############################################################################
##############################################################################
##
## Helper routines
##
##############################################################################
##############################################################################
print_debug()
{
if [ -n "$debug" ]; then
echo "$*"
fi
}
compare_rotpk_dev()
{
inkey=$1
stamp=$2
devrotpk=${tmpdir}/devrotpk.pem
rm -f $devrotpk
cat <<EOF > $devrotpk
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
EOF
if [ "$(cmp $inkey $devrotpk)" = "" ]; then
touch $stamp
return 1
fi
return 0
}
compare_rotpk_mfg()
{
inkey=$1
stamp=$2
mfgrotpk=${tmpdir}/mfgrotpk.pem
rm -f $mfgrotpk
if [ "$version" = "1" ]; then
cat <<EOF > $mfgrotpk
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
EOF
if [ "$(cmp $inkey $mfgrotpk)" = "" ]; then
touch $stamp
return 1
fi
elif [ "$version" = "2" ]; then
cat <<EOF > $mfgrotpk
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
EOF
if [ "$(cmp $inkey $mfgrotpk)" = "" ]; then
touch $stamp
return 1
fi
# Otherwise try second key.
cat <<EOF > $mfgrotpk
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
EOF
if [ "$(cmp $inkey $mfgrotpk)" = "" ]; then
touch $stamp
return 1
fi
# Otherwise try third key.
cat <<EOF > $mfgrotpk
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
EOF
if [ "$(cmp $inkey $mfgrotpk)" = "" ]; then
touch $stamp
return 1
fi
# Otherwise try fourth key.
cat <<EOF > $mfgrotpk
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
EOF
if [ "$(cmp $inkey $mfgrotpk)" = "" ]; then
touch $stamp
return 1
fi
fi
return 0
}
verify_rotpk()
{
cert=$1
keyder=$2
certkey=${tmpdir}/pkey.pem
mfgkeystamp=${tmpdir}/mfgkeystamp
devkeystamp=${tmpdir}/devkeystamp
rm -f $certkey $mfgkeystamp $devkeystamp
# Extract certificate public key
openssl x509 -pubkey -noout -inform der -in $cert > $certkey
# Check if public key is a development key
compare_rotpk_dev $certkey $devkeystamp | true
# Check if public key is an official key
compare_rotpk_mfg $certkey $mfgkeystamp | true
if [ -f "$mfgkeystamp" ]; then
echo " NVIDIA official ROT key (production)"
elif [ -f "$devkeystamp" ]; then
echo " NVIDIA development ROT key (development)"
else
echo " non-NVIDIA ROT key (unknown)"
fi
# Convert key from PEM to DER format
openssl rsa -pubin -inform pem -in $certkey -outform der -out $keyder \
2> /dev/null
}
verify_cert_pk()
{
cert=$1
keyder=$2
keypem=${tmpdir}/key.pem
certkey=${tmpdir}/pkey.pem
rm -f $certkey $keypem
# Convert key from DER to PEM format
openssl rsa -pubin -inform der -in $keyder -outform pem -out $keypem \
2> /dev/null
# Extract certificate public key
openssl x509 -pubkey -noout -inform der -in $cert > $certkey
# Compare public keys
cmp $keypem $certkey
if [ "$(echo $?)" != "0" ]; then
echo "** failed to verify PK"
exit 1
fi
print_debug "$(basename $cert): public key verified."
}
read_tbs_certificate()
{
in=$1
out=$2
#
# Extract the sequence TBSCertificate which contains certificate
# information that is signed. The ASN.1 DER encoded TBSCertificate
# is used as the input to the signature function.
#
# TBSCertificate ::= SEQUENCE {
# version [0] Version DEFAULT v1,
# serialNumber CertificateSerialNumber,
# signature AlgorithmIdentifier,
# issuer Name,
# validity Validity,
# subject Name,
# subjectPublicKeyInfo SubjectPublicKeyInfo,
# issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL,
# -- If present, version MUST be v2 or v3
# subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL,
# -- If present, version MUST be v2 or v3
# extensions [3] Extensions OPTIONAL
#
#
off=4
len=$(openssl asn1parse -inform der -in $in \
| head -n 2 | grep "4:d=1" | cut -d"=" -f4 | tr -dc '0-9')
# Include header (4 bytes)
dd if=$in of=$out skip=$off bs=$(expr $len + 4) count=1 iflag=skip_bytes \
2> /dev/null
}
read_signature_value()
{
in=$1
out=$2
#
# Extract the certificate signature value. The signatureValue field
# contains a digital signature computed upon the ASN.1 DER encoded
# TBSCertificate.
#
off=$(openssl asn1parse -inform der -in $in \
| tail -n 1 | cut -d":" -f1 | tr -dc '0-9')
len=512
# Skip header (4 bytes) and one extra byte (zero byte)
dd if=$in of=$out skip=$(expr $off + 4 + 1) bs=$len count=1 iflag=skip_bytes \
2> /dev/null
}
read_extension_value()
{
oid=$1
in=$2
out=$3
# The extension value follows static bytes "3051300D060960864801650304020305000440".
#
# Here's an exemple in DER ASN.1 format:
# 857:d=5 hl=2 l= 12 prim: OBJECT :1.3.6.1.4.1.33049.2100.201
# 871:d=5 hl=2 l= 1 prim: BOOLEAN :255
# 874:d=5 hl=2 l= 83 prim: OCTET STRING [HEX DUMP]:3051300D0609608648016503040203050004406410682AFF87ECC0B8081DCF2D5DF17DFA1978CACA259EA4C5A6EF881989E85D7B8A270DF640E05CDF95233CFF087EDBC167342F723064F1CFBF29795612905B
#
off=$(openssl asn1parse -inform der -in $in \
| grep "$oid" | cut -d":" -f1 | tr -dc '0-9')
len=64
# Skip the following:
# OID object: header (2 bytes) and data (12 bytes),
# Flag: header (2 bytes) and data (1 byte),
# Value: header (2 bytes) and static bytes (19 bytes)
dd if=$in of=$out skip=$(expr $off + 38) bs=$len count=1 iflag=skip_bytes \
2> /dev/null
}
verify_cert_sig()
{
cert=$1
certkey=${tmpdir}/pkey.pem
tbscert=${tmpdir}/tbscertificate.der
sigval=${tmpdir}/sigvalue.der
rm -f $certkey $tbscert $sigval
# Determine the Signature Algorithm.
# Only 'rsassaPss' and 'sha512WithRSAEncryption' are supported.
alg=$(openssl x509 -inform der -in $cert -text -noout \
-certopt ca_default -certopt no_validity -certopt no_serial \
-certopt no_subject -certopt no_extensions -certopt no_signame \
| grep "Signature Algorithm:" | cut -d":" -f2 | tr -d '[:space:]')
if [ "$alg" != "rsassaPss" ] && [ "$alg" != "sha512WithRSAEncryption" ]; then
echo "** Signature algorith '$alg' unsupported"
exit 1
fi
# Extract certificate public key
openssl x509 -pubkey -noout -inform der -in $cert > $certkey
# Read TBSCertificate
read_tbs_certificate $cert $tbscert
# Read the signatureValue
read_signature_value $cert $sigval
# Set OpenSSL arguments for signature verification.
opensslargs=
if [ "$alg" = "rsassaPss" ]; then
opensslargs="-sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:32 -sigopt rsa_mgf1_md:sha512"
fi
# Verify certificate signature.
openssl dgst \
-sha512 \
-verify $certkey \
-signature $sigval \
$opensslargs \
$tbscert
if [ "$(echo $?)" != "0" ]; then
echo "** failed to verify '$cert' signature."
exit 1
fi
print_debug "$(basename $cert): Content certificate verified."
}
verify_bl_digest()
{
oid=$1
cert=$2
bl=$3
dgst=${tmpdir}/dgst.bin
blsha512=${tmpdir}/blsha512.bin
rm -f $dgst $blsha512
# Read extension value
read_extension_value "$oid" $cert $dgst
# Verify extension value
openssl dgst -sha512 -binary -out $blsha512 $bl
cmp $dgst $blsha512
if [ "$(echo $?)" != "0" ]; then
echo "** failed to verify '$oid'"
exit 1
fi
print_debug "$(basename $cert): OID '$oid' verified."
}
read_extension_key()
{
oid=$1
in=$2
out=$3
off=$(openssl asn1parse -inform der -in $in \
| grep "$oid" | cut -d":" -f1 | tr -dc '0-9')
len=550
# Skip the following:
# OID object: header (2 bytes) and data (12 bytes),
# Flag: header (2 bytes) and data (1 byte),
# Value: header (4 bytes)
dd if=$in of=$out skip=$(expr $off + 21) bs=$len count=1 iflag=skip_bytes \
2> /dev/null
}
cleanup_tmp_files()
{
# Cleanup temp files.
rm -fr ${tmpdir}
}
exit_no_errors()
{
cleanup_tmp_files
echo ""
echo "Done."
exit 0
}
##############################################################################
##############################################################################
##
## Script starts here
##
##############################################################################
##############################################################################
echo ""
echo "Verify BFB for BlueField-$(expr $version + 1) platform"
echo "-----------------------------------"
cleanup_tmp_files
##############################################################################
# Extract the content of the BFB file
##############################################################################
# Create BFB temp directory.
bfbdir=${tmpdir}/bfb
if [ ! -d "${bfbdir}" ]; then
mkdir -p ${bfbdir}
fi
# Read the BFB file from eMMC boot partition, if needed.
if [ -n "$device" ]; then
inbfb=${tmpdir}/boot.bfb
# Cleanup old file, if needed.
rm -f $inbfb
# Retrieve BFB from the eMMC
$mlxbfbootctl -r $device -b $inbfb \
2>&1 /dev/null
fi
rm -f ${bfbdir}/dump-*
# Extract the content of the BFB.
(cd ${bfbdir}; $mkbfb -x $inbfb)
##############################################################################
# Check if certificates are present
##############################################################################
## First of all, if BL2/BL2R certificates are
## not present, just exit; assume the BFB is unsigned.
bl2rcert=${bfbdir}/dump-bl2r-cert-v${version}
bl2r=${bfbdir}/dump-bl2r-v${version}
bl2cert=${bfbdir}/dump-bl2-cert-v${version}
bl2=${bfbdir}/dump-bl2-v${version}
nobl2rcert=
if [ ! -f "$bl2rcert" ] && [ "$version" = 1 ]; then
nobl2rcert=1
fi
nobl2cert=
if [ ! -f "$bl2cert" ]; then
nobl2cert=1
fi
if [ -n "$nobl2rcert" ] || [ -n "$nobl2cert" ]; then
echo "Unsigned BFB file."
exit_no_errors
fi
##############################################################################
# Determine Root-of-Trust Public Key, if needed
##############################################################################
## If the ROTPK key is not specified, then
## read the rotpk key from the BL2/BL2R
## certificate.
if [ -z "$rotpk" ]; then
rotpk=${tmpdir}/rotpk.der
echo ""
echo "Verify Root-of-Trust Public Key:"
if [ "$version" != "1" ] && [ -f "$bl2cert" ]; then
verify_rotpk $bl2cert $rotpk
elif [ "$version" = "1" ] && [ -f "$bl2rcert" ]; then
verify_rotpk $bl2rcert $rotpk
fi
fi
##############################################################################
# Verify Chain-of-Trust (CoT) certificates
##############################################################################
## Exit if "skip_cot_verify" flag is set.
if [ -n "$skip_cot_verify" ]; then
exit_no_errors
else
echo ""
echo "Verify Chain-of-Trust certificates:"
fi
#
# Verify BL2R Content Certificate
#
bl2rcert=${bfbdir}/dump-bl2r-cert-v${version}
bl2r=${bfbdir}/dump-bl2r-v${version}
if [ -f "$bl2rcert" ]; then
echo -n " BL2R Content Certificate..."
# Verify certificate public key
verify_cert_pk $bl2rcert $rotpk
# Verify certificate signature
verify_cert_sig $bl2rcert $bl2r
# Verify BL2R Hash
# OID: 1.3.6.1.4.1.33049.2100.210
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.210" \
$bl2rcert \
$bl2r
fi
#
# Verify BL2 Content Certificate
#
bl2cert=${bfbdir}/dump-bl2-cert-v${version}
bl2=${bfbdir}/dump-bl2-v${version}
if [ -f "$bl2cert" ]; then
echo -n " BL2 Content Certificate..."
# Verify certificate public key
verify_cert_pk $bl2cert $rotpk
# Verify certificate signature
verify_cert_sig $bl2cert
# Verify BL2R Hash - TrustedBootFirmwareHash
# The TrustedBootFirmwareHash is expected in
# certificate extension.
# OID: 1.3.6.1.4.1.33049.2100.201
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.201" \
$bl2cert \
$bl2
fi
#
# Verify DDR Content Certificate
#
ddrcert=${bfbdir}/dump-ddr-cert-v${version}
ddrini=${bfbdir}/dump-ddr_ini-v${version}
ddrsnps=${bfbdir}/dump-snps_images-v${version}
ddrateimem=${bfbdir}/dump-ddr_ate_imem-v${version}
ddratedmem=${bfbdir}/dump-ddr_ate_dmem-v${version}
ddr5snps=${bfbdir}/dump-ddr5_snps_images-v${version}
echo -n " DDR Content Certificate..."
if [ ! -f "$ddrcert" ]; then
echo "Not Found"
else
# Verify certificate public key
verify_cert_pk $ddrcert $rotpk
# Verify certificate signature
verify_cert_sig $ddrcert
# Verify DdrIniHash
# The DdrIniHash is expected in
# certificate extension.
# OID: 1.3.6.1.4.1.33049.2100.204
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.204" \
$ddrcert \
$ddrini
# Verify DdrSnpsHash
# The DdrSnpsHash is expected in
# certificate extension.
# OID: 1.3.6.1.4.1.33049.2100.205
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.205" \
$ddrcert \
$ddrsnps
# Verify DdrAteImemHash
# The DdrAteImemHash is expected in
# certificate extension.
# OID: 1.3.6.1.4.1.33049.2100.206
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.206" \
$ddrcert \
$ddrateimem
# Verify DdrAteDmemHash
# The DdrAteDmemHash is expected in
# certificate extension.
# OID: 1.3.6.1.4.1.33049.2100.207
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.207" \
$ddrcert \
$ddratedmem
if [ "$version" = "2" ] && [ -f "$ddr5snps" ]; then
# Verify Ddr5SnpsHash
# The Ddr5SnpsHash is expected in
# certificate extension.
# OID: 1.3.6.1.4.1.33049.2100.208
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.208" \
$ddrcert \
$ddr5snps
fi
fi
#
# Verify Trusted Key Certificate
#
trustedkeycert=${bfbdir}/dump-trusted-key-cert-v${version}
trustedpk=${tmpdir}/trustedpk.der
untrustedpk=${tmpdir}/untrustedpk.der
rm -f $trustedpk $untrustedpk
echo -n " Trusted Key Certificate..."
if [ ! -f "$trustedkeycert" ]; then
echo "Not Found"
else
# Verify certificate public key
verify_cert_pk $trustedkeycert $rotpk
# Verify certificate signature
verify_cert_sig $trustedkeycert
# Read Trusted World public key
read_extension_key \
"1.3.6.1.4.1.33049.2100.302" \
$trustedkeycert \
$trustedpk
# Read Untrusted World public key
read_extension_key \
"1.3.6.1.4.1.33049.2100.303" \
$trustedkeycert \
$untrustedpk
#
# Verify BL31 Key Certificate
#
bl31keycert=${bfbdir}/dump-bl31-key-cert-v${version}
bl31key=${tmpdir}/bl31key.der
bl31cert=${bfbdir}/dump-bl31-cert-v${version}
bl31=${bfbdir}/dump-bl31-v${version}
rm -f $bl31key
echo -n " BL31 Key Certificate..."
if [ ! -f "$bl31keycert" ]; then
echo "Not Found"
else
# Verify certificate public key
verify_cert_pk $bl31keycert $trustedpk
# Verify certificate signature
verify_cert_sig $bl31keycert
# Read BL31 Key Certificate public key
read_extension_key \
"1.3.6.1.4.1.33049.2100.501" \
$bl31keycert \
$bl31key
#
# Verify BL31 Content Certificate
#
echo -n " Bl31 Content Certificate..."
if [ ! -f "$bl31cert" ]; then
echo "Not Found"
else
# Verify certificate public key
verify_cert_pk $bl31cert $bl31key
# Verify certificate signature
verify_cert_sig $bl31cert
# Verify BL31 Hash - SoCAPFirmwareHash
# The SoCAPFirmwareHash is expected in
# certificate extension.
# OID: 1.3.6.1.4.1.33049.2100.603
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.603" \
$bl31cert \
$bl31
fi
fi
#
# Verify BL32 Key Certificate
#
bl32keycert=${bfbdir}/dump-bl32-key-cert-v${version}
bl32key=${tmpdir}/bl32key.der
bl32cert=${bfbdir}/dump-bl32-cert-v${version}
bl32=${bfbdir}/dump-bl32-v0
rm -f $bl32key
echo -n " BL32 Key Certificate..."
if [ ! -f "$bl32keycert" ]; then
echo "Not Found"
else
# Verify certificate public key
verify_cert_pk $bl32keycert $trustedpk
# Verify certificate signature
verify_cert_sig $bl32keycert
# Read BL32 Key Certificate public key
read_extension_key \
"1.3.6.1.4.1.33049.2100.901" \
$bl32keycert \
$bl32key
#
# Verify BL32 Content Certificate
#
echo -n " Bl32 Content Certificate..."
if [ ! -f "$bl32cert" ]; then
echo "Not Found"
else
# Verify certificate public key
verify_cert_pk $bl32cert $bl32key
# Verify certificate signature
verify_cert_sig $bl32cert
# Verify BL32 Hash - TrustedOSFirmwareHash
# The TrustedOSFirmwareHash is expected in
# certificate extension.
# OID: 1.3.6.1.4.1.33049.2100.1001
#
verify_bl_digest \
"1.3.6.1.4.1.33049.2100.1001" \
$bl32cert \
$bl32
fi
fi