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#!/bin/sh
# -*- sh -*-
# gpgsm-gencert.c - Generate X.509 certificates through GPGSM.
# Copyright (C) 2004, 2005 Free Software Foundation, Inc.
#
# This file is part of GnuPG.
#
# GnuPG is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# GnuPG is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <http://www.gnu.org/licenses/>.
set -e
ASSUAN_FP_IN=4
ASSUAN_FP_OUT=5
ASSUAN_COMMANDS="\
INPUT FD=$ASSUAN_FP_IN\n\
OUTPUT FD=$ASSUAN_FP_OUT --armor\n\
GENKEY\n\
BYE\n"
ANSWER=""
query_user()
{
message=$1; shift
echo "$message" >&2
echo -n "> " >&2
read answer
ANSWER=$answer;
}
query_user_menu()
{
message=$1; shift
i=0
echo "$message" >&2
for choice in "$@"; do
i=$(expr $i + 1)
echo " [$i] $choice" >&2
done
while true; do
j=1
echo -n "Your selection: " >&2
read idx
while [ $j -lt $i -o $j -eq $i ]; do
if [ "$idx" = $j ]; then
break
fi
j=$(expr $j + 1)
done
if [ $j -lt $i -o $j -eq $i ]; then
break
fi
done
i=0
for choice in "$@"; do
i=$(expr $i + 1)
if [ $i -eq $idx ]; then
ANSWER=$1
break;
fi
shift
done
echo "You selected: $ANSWER" >&2
}
KEY_TYPE=""
while [ -z "$KEY_TYPE" ]; do
query_user_menu "Key type" "RSA" "Existing key" "Direct from card"
case "$ANSWER" in
RSA)
KEY_TYPE=$ANSWER
query_user_menu "Key length" "1024" "2048"
KEY_LENGTH=$ANSWER
KEY_GRIP=
;;
Existing*)
# User requested to use an existing key; need to set some dummy defaults
query_user "Keygrip "
if [ -n "$ANSWER" ]; then
KEY_TYPE=RSA
KEY_LENGTH=1024
KEY_GRIP=$ANSWER
fi
;;
Direct*)
tmp=$(echo 'SCD SERIALNO' | gpg-connect-agent | \
awk '$2 == "SERIALNO" {print $3}')
if [ -z "$tmp" ]; then
echo "No card found" >&2
else
echo "Card with S/N $tmp found" >&2
tmp=$(echo 'SCD LEARN --force' | gpg-connect-agent | \
awk '$2 == "KEYPAIRINFO" {printf " %s", $4}')
sshid=$(echo 'SCD GETATTR $AUTHKEYID' | gpg-connect-agent | \
awk '$2 == "$AUTHKEYID" {print $3}')
[ -n "$sshid" ] && echo "gpg-agent uses $sshid as ssh key" >&2
query_user_menu "Select key " $tmp "back"
if [ "$ANSWER" != "back" ]; then
KEY_TYPE="card:$ANSWER"
KEY_LENGTH=
KEY_GRIP=
fi
fi
;;
*)
exit 1
;;
esac
done
query_user_menu "Key usage" "sign, encrypt" "sign" "encrypt"
KEY_USAGE=$ANSWER
query_user "Name (DN)"
NAME=$ANSWER
EMAIL_ADDRESSES=
LF=
while : ; do
query_user "E-Mail addresses (end with an empty line)"
[ -z "$ANSWER" ] && break
EMAIL_ADDRESSES="${EMAIL_ADDRESSES}${LF}Name-Email: $ANSWER"
LF='
'
done
DNS_ADDRESSES=
LF=
while : ; do
query_user "DNS Names (optional; end with an empty line)"
[ -z "$ANSWER" ] && break
DNS_ADDRESSES="${DNS_ADDRESSES}${LF}Name-DNS: $ANSWER"
LF='
'
done
URI_ADDRESSES=
LF=
while : ; do
query_user "URIs (optional; end with an empty line)"
[ -z "$ANSWER" ] && break
URI_ADDRESSES="${URI_ADDRESSES}${LF}Name-URI: $ANSWER"
LF='
'
done
file_parameter=$(mktemp "/tmp/gpgsm.XXXXXX")
outfile=$(mktemp "/tmp/gpgsm.XXXXXX")
(
cat <<EOF
Key-Type: $KEY_TYPE
Key-Length: $KEY_LENGTH
Key-Usage: $KEY_USAGE
Name-DN: $NAME
EOF
[ -n "$KEY_GRIP" ] && echo "Key-Grip: $KEY_GRIP"
[ -n "$EMAIL_ADDRESSES" ] && echo "$EMAIL_ADDRESSES"
[ -n "$DNS_ADDRESSES" ] && echo "$DNS_ADDRESSES"
[ -n "$URI_ADDRESSES" ] && echo "$URI_ADDRESSES"
) > "$file_parameter"
echo 'Parameters for certificate request to create:' >&2
cat -n "$file_parameter" >&2
echo >&2
query_user_menu "Really create such a CSR?" "yes" "no"
[ "$ANSWER" != "yes" ] && exit 1
printf "$ASSUAN_COMMANDS" | \
gpgsm --no-log-file --debug-level none --debug-none \
--server 4< "$file_parameter" 5>"$outfile" >/dev/null
cat "$outfile"
rm "$file_parameter" "$outfile"
exit 0
|
