This file is indexed.

/usr/sbin/nsd-control-setup is in nsd 4.1.7-1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
#!/bin/sh
#
# nsd-control-setup.sh - set up SSL certificates for nsd-control
#
# Copyright (c) 2011, NLnet Labs. All rights reserved.
#
# This software is open source.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 
# Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 
# 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.
# 
# Neither the name of the NLNET LABS nor the names of its contributors may
# be used to endorse or promote products derived from this software without
# specific prior written permission.
# 
# 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
# HOLDER 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.

# settings:

# directory for files
DESTDIR=/etc/nsd

# issuer and subject name for certificates
SERVERNAME=nsd
CLIENTNAME=nsd-control

# validity period for certificates
DAYS=7200

# size of keys in bits
BITS=3072

# hash algorithm
HASH=sha256

# base name for nsd server keys
SVR_BASE=nsd_server

# base name for nsd-control keys
CTL_BASE=nsd_control

# we want -rw-r--- access (say you run this as root: grp=yes (server), all=no).
umask 0026

# end of options

# functions:
error ( ) {
	echo "$0 fatal error: $1"
	exit 1
}

# check arguments:
while test $# -ne 0; do
	case $1 in
	-d)
	if test $# -eq 1; then error "need argument for -d"; fi
	DESTDIR="$2"
	shift
	;;
	*)
	echo "nsd-control-setup.sh - setup SSL keys for nsd-control"
	echo "	-d dir	use directory to store keys and certificates."
	echo "		default: $DESTDIR"
	exit 1
	;;
	esac
	shift
done

# go!:
echo "setup in directory $DESTDIR"
cd "$DESTDIR" || error "could not cd to $DESTDIR"

# create certificate keys; do not recreate if they already exist.
if test -f $SVR_BASE.key; then
	echo "$SVR_BASE.key exists"
else
	echo "generating $SVR_BASE.key"
	openssl genrsa -out $SVR_BASE.key $BITS || error "could not genrsa"
fi
if test -f $CTL_BASE.key; then
	echo "$CTL_BASE.key exists"
else
	echo "generating $CTL_BASE.key"
	openssl genrsa -out $CTL_BASE.key $BITS || error "could not genrsa"
fi

# create self-signed cert for server
cat >request.cfg <<EOF
[req]
default_bits=$BITS
default_md=$HASH
prompt=no
distinguished_name=req_distinguished_name

[req_distinguished_name]
commonName=$SERVERNAME
EOF
test -f request.cfg || error "could not create request.cfg"

echo "create $SVR_BASE.pem (self signed certificate)"
openssl req -key $SVR_BASE.key -config request.cfg  -new -x509 -days $DAYS -out $SVR_BASE.pem || error "could not create $SVR_BASE.pem"
# create trusted usage pem
openssl x509 -in $SVR_BASE.pem -addtrust serverAuth -out $SVR_BASE"_trust.pem"

# create client request and sign it, piped
cat >request.cfg <<EOF
[req]
default_bits=$BITS
default_md=$HASH
prompt=no
distinguished_name=req_distinguished_name

[req_distinguished_name]
commonName=$CLIENTNAME
EOF
test -f request.cfg || error "could not create request.cfg"

echo "create $CTL_BASE.pem (signed client certificate)"
openssl req -key $CTL_BASE.key -config request.cfg -new | openssl x509 -req -days $DAYS -CA $SVR_BASE"_trust.pem" -CAkey $SVR_BASE.key -CAcreateserial -$HASH -out $CTL_BASE.pem
test -f $CTL_BASE.pem || error "could not create $CTL_BASE.pem"
# create trusted usage pem
# openssl x509 -in $CTL_BASE.pem -addtrust clientAuth -out $CTL_BASE"_trust.pem"

# see details with openssl x509 -noout -text < $SVR_BASE.pem
# echo "create $CTL_BASE""_browser.pfx (web client certificate)"
# echo "create webbrowser PKCS#12 .PFX certificate file. In Firefox import in:"
# echo "preferences - advanced - encryption - view certificates - your certs"
# echo "empty password is used, simply click OK on the password dialog box."
# openssl pkcs12 -export -in $CTL_BASE"_trust.pem" -inkey $CTL_BASE.key -name "nsd remote control client cert" -out $CTL_BASE"_browser.pfx" -password "pass:" || error "could not create browser certificate"

# remove unused permissions
chmod o-rw $SVR_BASE.pem $SVR_BASE.key $CTL_BASE.pem $CTL_BASE.key

# remove crap
rm -f request.cfg
rm -f $CTL_BASE"_trust.pem" $SVR_BASE"_trust.pem" $SVR_BASE"_trust.srl"

echo "Setup success. Certificates created."

exit 0