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#!/bin/bash
# Script to create a signed container. Intended for op-build integration.
VERBOSE=""
DEBUG=""
WRAP=""
RC=0
P=${0##*/}
# Functions
usage () {
echo ""
echo " Options:"
echo " -h, --help display this message and exit"
echo " -v, --verbose show verbose output"
echo " -d, --debug show additional debug output"
echo " -w, --wrap column to wrap long output in verbose mode"
echo " -a, --hwPrivKeyA file containing HW key A private key in PEM format"
echo " -b, --hwPrivKeyB file containing HW key B private key in PEM format"
echo " -c, --hwPrivKeyC file containing HW key C private key in PEM format"
echo " -p, --swPrivKeyP file containing SW key P private key in PEM format"
echo " -q, --swPrivKeyQ file containing SW key Q private key in PEM format"
echo " -r, --swPrivKeyR file containing SW key R private key in PEM format"
echo " -l, --protectedPayload file containing the payload to be signed"
echo " -i, --out file to write containerized payload"
echo " -o, --code-start-offset code start offset for software header in hex"
echo " -f, --flags prefix header flags in hex"
echo " -L, --label name or identifier of the module being built (8 char max)"
echo " --validate validate the container after build"
echo " --verify verify the container after build, against the provided"
echo " value, or filename containing value, of the HW Keys hash"
echo ""
exit 1
}
die () {
echo "$P: $@" 1>&2
exit 1
}
is_private_key () {
openssl ec -pubout -in $1 &>/dev/null
}
is_public_key () {
openssl ec -pubin -pubout -in $1 &>/dev/null
}
checkKey () {
# The variable name
KEY_NAME=$1
# The filename holding the key
K=${!KEY_NAME}
KEYS=0
PUBKEYS=0
if [ -n "$K" ]; then
if [ -f $K ]; then
if is_private_key $K; then
KEYS=1
elif is_public_key $K; then
KEYS=1
PUBKEYS=1
else
die "Key $KEY_NAME is neither a public nor private key"
fi
else
die "Can't open file: $K for $KEY_NAME"
fi
fi
# Increment key counts accordingly
if [[ $KEY_NAME =~ HW_KEY* ]]; then
HW_KEY_COUNT=$(expr $HW_KEY_COUNT + $KEYS)
HW_KEY_PUBKEY_COUNT=$(expr $HW_KEY_PUBKEY_COUNT + $PUBKEYS)
elif [[ $KEY_NAME =~ SW_KEY* ]]; then
SW_KEY_COUNT=$(expr $SW_KEY_COUNT + $KEYS)
SW_KEY_PUBKEY_COUNT=$(expr $SW_KEY_PUBKEY_COUNT + $PUBKEYS)
fi
}
# Main
# Convert long options to short
for arg in "$@"; do
shift
case "$arg" in
"--help") set -- "$@" "-h" ;;
"--verbose") set -- "$@" "-v" ;;
"--debug") set -- "$@" "-d" ;;
"--wrap") set -- "$@" "-w" ;;
"--hwPrivKeyA") set -- "$@" "-a" ;;
"--hwPrivKeyB") set -- "$@" "-b" ;;
"--hwPrivKeyC") set -- "$@" "-c" ;;
"--swPrivKeyP") set -- "$@" "-p" ;;
"--swPrivKeyQ") set -- "$@" "-q" ;;
"--swPrivKeyR") set -- "$@" "-r" ;;
"--flags") set -- "$@" "-f" ;;
"--code-start-offset") set -- "$@" "-o" ;;
"--protectedPayload") set -- "$@" "-l" ;;
"--out") set -- "$@" "-i" ;;
"--label ") set -- "$@" "-L" ;;
"--sign-project-FW-token") set -- "$@" "-L" ;;
"--validate") set -- "$@" "-8" ;;
"--verify") set -- "$@" "-9" ;;
*) set -- "$@" "$arg"
esac
done
# Process command-line arguments
while getopts ?dvw:a:b:c:p:q:r:f:o:l:i:L:89: opt
do
case "$opt" in
v) VERBOSE="TRUE";;
d) DEBUG="TRUE";;
w) WRAP="`echo $OPTARG`";;
a) HW_KEY_A="`echo $OPTARG`";;
b) HW_KEY_B="`echo $OPTARG`";;
c) HW_KEY_C="`echo $OPTARG`";;
p) SW_KEY_P="`echo $OPTARG`";;
q) SW_KEY_Q="`echo $OPTARG`";;
r) SW_KEY_R="`echo $OPTARG`";;
f) HW_FLAGS="`echo $OPTARG | tr A-Z a-z`";;
o) CS_OFFSET="`echo $OPTARG | tr A-Z a-z`";;
l) PAYLOAD="`echo $OPTARG`";;
i) OUTPUT="`echo $OPTARG`";;
L) LABEL="`echo $OPTARG`";;
8) VALIDATE="TRUE";;
9) VERIFY="`echo $OPTARG`";;
h|\?) usage;;
esac
done
# Check arguments
test -z "$PAYLOAD" && die "Input payload required"
test -z "$OUTPUT" && die "Destination imagefile required"
test ! -f "$PAYLOAD" && die "Can't open payload file: $PAYLOAD"
# Check input keys
HW_KEY_COUNT=0
HW_KEY_PUBKEY_COUNT=0
SW_KEY_COUNT=0
SW_KEY_PUBKEY_COUNT=0
for KEY in HW_KEY_A HW_KEY_B HW_KEY_C; do
checkKey $KEY
done
for KEY in SW_KEY_P SW_KEY_Q SW_KEY_R; do
checkKey $KEY
done
# Set cache directory
set ${TMPDIR:=/tmp}
SCRATCH_DIR=$TMPDIR
moniker="SIGNTOOL"
KEEP_CACHE=true
test -z "$LABEL" && KEEP_CACHE=false && LABEL="IMAGE"
TOPDIR=$(ls -1dt $SCRATCH_DIR/${moniker}_* 2>/dev/null | head -1)
if [ -n "$TOPDIR" ]; then
crtTime=$(date -d @$(basename $TOPDIR | cut -d_ -f2))
echo "--> $P: Using existing cache dir: $TOPDIR, created: $crtTime"
else
buildID="${moniker}_$(date +%s)"
TOPDIR=$SCRATCH_DIR/$buildID
echo "--> $P: Creating new cache dir: $TOPDIR"
mkdir $TOPDIR
fi
T=$TOPDIR/$LABEL
if [ -d "$T" ]; then
echo "--> $P: Using existing cache subdir: $T"
else
echo "--> $P: Creating new cache subdir: $T"
mkdir $T
fi
# Set arguments for (program) execution
HW_KEY_ARGS=""
SW_KEY_ARGS=""
HW_SIG_ARGS=""
SW_SIG_ARGS=""
VERIFY_ARGS=""
DEBUG_ARGS=""
ADDL_ARGS=""
[ -n "$HW_KEY_A" ] && HW_KEY_ARGS="$HW_KEY_ARGS -a $HW_KEY_A"
[ -n "$HW_KEY_B" ] && HW_KEY_ARGS="$HW_KEY_ARGS -b $HW_KEY_B"
[ -n "$HW_KEY_C" ] && HW_KEY_ARGS="$HW_KEY_ARGS -c $HW_KEY_C"
[ -n "$SW_KEY_P" ] && SW_KEY_ARGS="$SW_KEY_ARGS -p $SW_KEY_P"
[ -n "$SW_KEY_Q" ] && SW_KEY_ARGS="$SW_KEY_ARGS -q $SW_KEY_Q"
[ -n "$SW_KEY_R" ] && SW_KEY_ARGS="$SW_KEY_ARGS -r $SW_KEY_R"
[ -n "$VERBOSE" ] && DEBUG_ARGS="$DEBUG_ARGS -v"
[ -n "$DEBUG" ] && DEBUG_ARGS="$DEBUG_ARGS -d"
[ -n "$WRAP" ] && DEBUG_ARGS="$DEBUG_ARGS -w $WRAP"
[ -n "$HW_FLAGS" ] && ADDL_ARGS="$ADDL_ARGS --hw-flags $HW_FLAGS"
[ -n "$CS_OFFSET" ] && ADDL_ARGS="$ADDL_ARGS --sw-cs-offset $CS_OFFSET"
[ -n "$VALIDATE" ] && VERIFY_ARGS="$VERIFY_ARGS --validate"
[ -n "$VERIFY" ] && VERIFY_ARGS="$VERIFY_ARGS --verify $VERIFY"
# Build enough of the container to create the Prefix and Software headers
echo "--> $P: Generating signing requests..."
create-container $HW_KEY_ARGS $SW_KEY_ARGS \
--payload $PAYLOAD --imagefile $OUTPUT \
--dumpPrefixHdr $T/prefix_hdr --dumpSwHdr $T/software_hdr \
$DEBUG_ARGS \
$ADDL_ARGS
# Sign the Prefix header (all 3 HW keys are required)
if [ "$HW_KEY_COUNT" -eq "3" -a "$HW_KEY_PUBKEY_COUNT" -eq "0" ]
then
echo "--> $P: Executing signing request for HW keys A,B,C..."
openssl dgst -SHA512 -sign $HW_KEY_A $T/prefix_hdr > $T/hw_key_a.sig
openssl dgst -SHA512 -sign $HW_KEY_B $T/prefix_hdr > $T/hw_key_b.sig
openssl dgst -SHA512 -sign $HW_KEY_C $T/prefix_hdr > $T/hw_key_c.sig
fi
# Sign the Software header (at least one SW key is required)
if [ "$SW_KEY_COUNT" -gt "0" -a "$SW_KEY_PUBKEY_COUNT" -eq "0" ]
then
if [ -n "$SW_KEY_P" ]; then
echo "--> $P: Executing signing request for SW key P..."
openssl dgst -SHA512 -sign $SW_KEY_P $T/software_hdr > $T/sw_key_p.sig
fi
if [ -n "$SW_KEY_Q" ]; then
echo "--> $P: Executing signing request for SW key Q..."
openssl dgst -SHA512 -sign $SW_KEY_Q $T/software_hdr > $T/sw_key_q.sig
fi
if [ -n "$SW_KEY_R" ]; then
echo "--> $P: Executing signing request for SW key R..."
openssl dgst -SHA512 -sign $SW_KEY_R $T/software_hdr > $T/sw_key_r.sig
fi
fi
# Find signatures
FOUND=""
if [ -f $T/hw_key_a.sig ]; then
FOUND="${FOUND}A,"
HW_SIG_ARGS="$HW_SIG_ARGS -A $T/hw_key_a.sig"
fi
if [ -f $T/hw_key_b.sig ]; then
FOUND="${FOUND}B,"
HW_SIG_ARGS="$HW_SIG_ARGS -B $T/hw_key_b.sig"
fi
if [ -f $T/hw_key_c.sig ]; then
FOUND="${FOUND}C,"
HW_SIG_ARGS="$HW_SIG_ARGS -C $T/hw_key_c.sig"
fi
if [ -f $T/sw_key_p.sig ]; then
FOUND="${FOUND}P,"
SW_SIG_ARGS="$SW_SIG_ARGS -P $T/sw_key_p.sig"
fi
if [ -f $T/sw_key_q.sig ]; then
FOUND="${FOUND}Q,"
SW_SIG_ARGS="$SW_SIG_ARGS -Q $T/sw_key_q.sig"
fi
if [ -f $T/sw_key_r.sig ]; then
FOUND="${FOUND}R,"
SW_SIG_ARGS="$SW_SIG_ARGS -R $T/sw_key_r.sig"
fi
# Build the full container
if [ -n "$HW_SIG_ARGS" -o -n "$SW_SIG_ARGS" ]; then
echo "--> $P: Have signatures for keys $FOUND adding to container..."
create-container $HW_KEY_ARGS $SW_KEY_ARGS \
$HW_SIG_ARGS $SW_SIG_ARGS \
--payload $PAYLOAD --imagefile $OUTPUT \
$DEBUG_ARGS \
$ADDL_ARGS
else
echo "--> $P: No signatures available."
fi
echo "--> $P: Container build completed."
# Validate, verify the container.
if [ -n "$VALIDATE" -o -n "$VERIFY" ]; then
echo
print-container --imagefile $OUTPUT --no-print $VERIFY_ARGS $DEBUG_ARGS
RC=$?
fi
# Cleanup
if [ $KEEP_CACHE == false ]; then
echo "--> $P: Removing cache subdir: $T"
rm -rf $T
T=$(dirname $T)
if rmdir $T; then
echo "--> $P: Removing cache dir: $T"
else
echo "--> $P: Not removing cache dir: $T"
fi
fi
exit $RC
|