utilities/ovs-pki.in

   1 #! /bin/sh
   2
   3 # Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at:
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 set -e
  18
  19 pkidir='@PKIDIR@'
  20 command=
  21 prev=
  22 force=no
  23 batch=no
  24 log='@LOGDIR@/ovs-pki.log'
  25 keytype=rsa
  26 bits=2048
  27
  28 # OS-specific compatibility routines
  29 case $(uname -s) in
  30 FreeBSD)
  31     file_mod_epoch()
  32     {
  33         stat -r "$1" | awk '{print $10}'
  34     }
  35
  36     file_mod_date()
  37     {
  38         stat -f '%Sm' "$1"
  39     }
  40
  41     sha1sum()
  42     {
  43         sha1 "$@"
  44     }
  45     ;;
  46 *)
  47     file_mod_epoch()
  48     {
  49         date -r "$1" +%s
  50     }
  51
  52     file_mod_date()
  53     {
  54         date -r "$1"
  55     }
  56     ;;
  57 esac
  58
  59 for option; do
  60     # This option-parsing mechanism borrowed from a Autoconf-generated
  61     # configure script under the following license:
  62
  63     # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
  64     # 2002, 2003, 2004, 2005, 2006, 2009 Free Software Foundation, Inc.
  65     # This configure script is free software; the Free Software Foundation
  66     # gives unlimited permission to copy, distribute and modify it.
  67
  68     # If the previous option needs an argument, assign it.
  69     if test -n "$prev"; then
  70         eval $prev=\$option
  71         prev=
  72         continue
  73     fi
  74     case $option in
  75         *=*) optarg=`expr "X$option" : '[^=]*=\(.*\)'` ;;
  76         *) optarg=yes ;;
  77     esac
  78
  79     case $dashdash$option in
  80         --)
  81             dashdash=yes ;;
  82         -h|--help)
  83             cat <<EOF
  84 ovs-pki, for managing a simple OpenFlow public key infrastructure
  85 usage: $0 [OPTION...] COMMAND [ARG...]
  86
  87 The valid stand-alone commands and their arguments are:
  88   init                 Initialize the PKI
  89   req NAME             Create new private key and certificate request
  90                        named NAME-privkey.pem and NAME-req.pem, resp.
  91   sign NAME [TYPE]     Sign switch certificate request NAME-req.pem,
  92                        producing certificate NAME-cert.pem
  93   req+sign NAME [TYPE] Combine the above two steps, producing all three files.
  94   verify NAME [TYPE]   Checks that NAME-cert.pem is a valid TYPE certificate
  95   fingerprint FILE     Prints the fingerprint for FILE
  96   self-sign NAME       Sign NAME-req.pem with NAME-privkey.pem,
  97                        producing self-signed certificate NAME-cert.pem
  98 Each TYPE above is a certificate type: 'switch' (default) or 'controller'.
  99
 100 Options for 'init', 'req', and 'req+sign' only:
 101   -k, --key=rsa|dsa    Type of keys to use (default: rsa)
 102   -B, --bits=NBITS     Number of bits in keys (default: 2048).  For DSA keys,
 103                          this has an effect only on 'init'.
 104   -D, --dsaparam=FILE  File with DSA parameters (DSA only)
 105                          (default: dsaparam.pem within PKI directory)
 106 Options for use with the 'sign' command:
 107   -b, --batch          Skip fingerprint verification
 108 Options that apply to any command:
 109   -d, --dir=DIR        Directory where the PKI is located
 110                          (default: $pkidir)
 111   -f, --force          Continue even if file or directory already exists
 112   -l, --log=FILE       Log openssl output to FILE (default: ovs-log.log)
 113   -h, --help           Print this usage message.
 114   -V, --version        Display version information.
 115 EOF
 116             exit 0
 117             ;;
 118         -V|--version)
 119             echo "ovs-pki (Open vSwitch) @VERSION@"
 120             exit 0
 121             ;;
 122         --di*=*)
 123             pkidir=$optarg
 124             ;;
 125         --di*|-d)
 126             prev=pkidir
 127             ;;
 128         --k*=*)
 129             keytype=$optarg
 130             ;;
 131         --k*|-k)
 132             prev=keytype
 133             ;;
 134         --bi*=*)
 135             bits=$optarg
 136             ;;
 137         --bi*|-B)
 138             prev=bits
 139             ;;
 140         --ds*=*)
 141             dsaparam=$optarg
 142             ;;
 143         --ds*|-D)
 144             prev=dsaparam
 145             ;;
 146         --l*=*)
 147             log=$optarg
 148             ;;
 149         --l*|-l)
 150             prev=log
 151             ;;
 152         --force|-f)
 153             force=yes
 154             ;;
 155         --ba*|-b)
 156             batch=yes
 157             ;;
 158         -*)
 159             echo "unrecognized option $option" >&2
 160             exit 1
 161             ;;
 162         *)
 163             if test -z "$command"; then
 164                 command=$option
 165             elif test -z "${arg1+set}"; then
 166                 arg1=$option
 167             elif test -z "${arg2+set}"; then
 168                 arg2=$option
 169             else
 170                 echo "$option: only two arguments may be specified" >&2
 171                 exit 1
 172             fi
 173             ;;
 174     esac
 175     shift
 176 done
 177 if test -n "$prev"; then
 178     option=--`echo $prev | sed 's/_/-/g'`
 179     { echo "$as_me: error: missing argument to $option" >&2
 180         { (exit 1); exit 1; }; }
 181 fi
 182 if test -z "$command"; then
 183     echo "$0: missing command name; use --help for help" >&2
 184     exit 1
 185 fi
 186 if test "$keytype" != rsa && test "$keytype" != dsa; then
 187     echo "$0: argument to -k or --key must be rsa or dsa" >&2
 188     exit 1
 189 fi
 190 if test "$bits" -lt 1024; then
 191     echo "$0: argument to -B or --bits must be at least 1024" >&2
 192     exit 1
 193 fi
 194 if test -z "$dsaparam"; then
 195     dsaparam=$pkidir/dsaparam.pem
 196 fi
 197 case $log in
 198     /*) ;;
 199     *) log=`pwd`/$log ;;
 200 esac
 201
 202 logdir=$(dirname "$log")
 203 if test ! -d "$logdir"; then
 204     mkdir -p -m755 "$logdir" 2>/dev/null || true
 205     if test ! -d "$logdir"; then
 206         echo "$0: log directory $logdir does not exist and cannot be created" >&2
 207         exit 1
 208     fi
 209 fi
 210
 211 if test "$command" = "init"; then
 212     if test -e "$pkidir" && test "$force" != "yes"; then
 213         echo "$0: $pkidir already exists and --force not specified" >&2
 214         exit 1
 215     fi
 216
 217     if test ! -d "$pkidir"; then
 218         mkdir -p "$pkidir"
 219     fi
 220     cd "$pkidir"
 221     exec 3>>$log
 222
 223     if test $keytype = dsa && test ! -e dsaparam.pem; then
 224         echo "Generating DSA parameters, please wait..." >&2
 225         openssl dsaparam -out dsaparam.pem $bits 1>&3 2>&3
 226     fi
 227
 228     # Get the current date to add some uniqueness to this certificate
 229     curr_date=`date +"%Y %b %d %T"`
 230
 231     # Create the CAs.
 232     for ca in controllerca switchca; do
 233         echo "Creating $ca..." >&2
 234         oldpwd=`pwd`
 235         mkdir -p $ca
 236         cd $ca
 237
 238         mkdir -p certs crl newcerts
 239         mkdir -p -m 0700 private
 240         touch index.txt
 241         test -e crlnumber || echo 01 > crlnumber
 242         test -e serial || echo 01 > serial
 243
 244         # Put DSA parameters in directory.
 245         if test $keytype = dsa && test ! -e dsaparam.pem; then
 246             cp ../dsaparam.pem .
 247         fi
 248
 249         # Write CA configuration file.
 250         if test ! -e ca.cnf; then
 251             sed "s/@ca@/$ca/g;s/@curr_date@/$curr_date/g" > ca.cnf <<'EOF'
 252 [ req ]
 253 prompt = no
 254 distinguished_name = req_distinguished_name
 255
 256 [ req_distinguished_name ]
 257 C = US
 258 ST = CA
 259 L = Palo Alto
 260 O = Open vSwitch
 261 OU = @ca@
 262 CN = OVS @ca@ CA Certificate (@curr_date@)
 263
 264 [ ca ]
 265 default_ca = the_ca
 266
 267 [ the_ca ]
 268 dir            = .                     # top dir
 269 database       = $dir/index.txt        # index file.
 270 new_certs_dir  = $dir/newcerts         # new certs dir
 271 certificate    = $dir/cacert.pem       # The CA cert
 272 serial         = $dir/serial           # serial no file
 273 private_key    = $dir/private/cakey.pem# CA private key
 274 RANDFILE       = $dir/private/.rand    # random number file
 275 default_days   = 365                   # how long to certify for
 276 default_crl_days= 30                   # how long before next CRL
 277 default_md     = md5                   # md to use
 278 policy         = policy                # default policy
 279 email_in_dn    = no                    # Don't add the email into cert DN
 280 name_opt       = ca_default            # Subject name display option
 281 cert_opt       = ca_default            # Certificate display option
 282 copy_extensions = none                 # Don't copy extensions from request
 283 unique_subject = no                    # Allow certs with duplicate subjects
 284
 285 # For the CA policy
 286 [ policy ]
 287 countryName             = optional
 288 stateOrProvinceName     = optional
 289 organizationName        = match
 290 organizationalUnitName  = optional
 291 commonName              = supplied
 292 emailAddress            = optional
 293 EOF
 294         fi
 295
 296         # Create certificate authority.
 297         if test $keytype = dsa; then
 298             newkey=dsa:dsaparam.pem
 299         else
 300             newkey=rsa:$bits
 301         fi
 302         openssl req -config ca.cnf -nodes \
 303             -newkey $newkey -keyout private/cakey.pem -out careq.pem \
 304             1>&3 2>&3
 305         openssl ca -config ca.cnf -create_serial -out cacert.pem \
 306             -days 2191 -batch -keyfile private/cakey.pem -selfsign \
 307             -infiles careq.pem 1>&3 2>&3
 308         chmod 0700 private/cakey.pem
 309
 310         cd "$oldpwd"
 311     done
 312     exit 0
 313 fi
 314
 315 one_arg() {
 316     if test -z "$arg1" || test -n "$arg2"; then
 317         echo "$0: $command must have exactly one argument; use --help for help" >&2
 318         exit 1
 319     fi
 320 }
 321
 322 one_or_two_args() {
 323     if test -z "$arg1"; then
 324         echo "$0: $command must have one or two arguments; use --help for help" >&2
 325         exit 1
 326     fi
 327 }
 328
 329 must_not_exist() {
 330     if test -e "$1" && test "$force" != "yes"; then
 331         echo "$0: $1 already exists and --force not supplied" >&2
 332         exit 1
 333     fi
 334 }
 335
 336 make_tmpdir() {
 337     TMP=/tmp/ovs-pki.tmp$$
 338     rm -rf $TMP
 339     trap "rm -rf $TMP" 0
 340     mkdir -m 0700 $TMP
 341 }
 342
 343 fingerprint() {
 344     file=$1
 345     name=${1-$2}
 346     date=$(file_mod_date "$file")
 347     if grep -e '-BEGIN CERTIFICATE-' "$file" > /dev/null; then
 348         fingerprint=$(openssl x509 -noout -in "$file" -fingerprint |
 349                       sed 's/SHA1 Fingerprint=//' | tr -d ':')
 350     else
 351         fingerprint=$(sha1sum "$file" | awk '{print $1}')
 352     fi
 353     printf "$name\\t$date\\n"
 354     case $file in
 355         $fingerprint*)
 356             printf "\\t(correct fingerprint in filename)\\n"
 357             ;;
 358         *)
 359             printf "\\tfingerprint $fingerprint\\n"
 360             ;;
 361     esac
 362 }
 363
 364 verify_fingerprint() {
 365     fingerprint "$@"
 366     if test $batch != yes; then
 367         echo "Does fingerprint match? (yes/no)"
 368         read answer
 369         if test "$answer" != yes; then
 370             echo "Match failure, aborting" >&2
 371             exit 1
 372         fi
 373     fi
 374 }
 375
 376 check_type() {
 377     if test x = x"$1"; then
 378         type=switch
 379     elif test "$1" = switch || test "$1" = controller; then
 380         type=$1
 381     else
 382         echo "$0: type argument must be 'switch' or 'controller'" >&2
 383         exit 1
 384     fi
 385 }
 386
 387 parse_age() {
 388     number=$(echo $1 | sed 's/^\([0-9]\+\)\([[:alpha:]]\+\)/\1/')
 389     unit=$(echo $1 | sed 's/^\([0-9]\+\)\([[:alpha:]]\+\)/\2/')
 390     case $unit in
 391         s)
 392             factor=1
 393             ;;
 394         min)
 395             factor=60
 396             ;;
 397         h)
 398             factor=3600
 399             ;;
 400         day)
 401             factor=86400
 402             ;;
 403         *)
 404             echo "$1: age not in the form Ns, Nmin, Nh, Nday (e.g. 1day)" >&2
 405             exit 1
 406             ;;
 407     esac
 408     echo $(($number * $factor))
 409 }
 410
 411 must_exist() {
 412     if test ! -e "$1"; then
 413         echo "$0: $1 does not exist" >&2
 414         exit 1
 415     fi
 416 }
 417
 418 pkidir_must_exist() {
 419     if test ! -e "$pkidir"; then
 420         echo "$0: $pkidir does not exist (need to run 'init' or use '--dir'?)" >&2
 421         exit 1
 422     elif test ! -d "$pkidir"; then
 423         echo "$0: $pkidir is not a directory" >&2
 424         exit 1
 425     fi
 426 }
 427
 428 make_request() {
 429     must_not_exist "$arg1-privkey.pem"
 430     must_not_exist "$arg1-req.pem"
 431     make_tmpdir
 432     cat > "$TMP/req.cnf" <<EOF
 433 [ req ]
 434 prompt = no
 435 distinguished_name = req_distinguished_name
 436
 437 [ req_distinguished_name ]
 438 C = US
 439 ST = CA
 440 L = Palo Alto
 441 O = Open vSwitch
 442 OU = Open vSwitch certifier
 443 CN = Open vSwitch certificate for $arg1
 444 EOF
 445     if test $keytype = rsa; then
 446         (umask 077 && openssl genrsa -out "$1-privkey.pem" $bits) 1>&3 2>&3 \
 447             || exit $?
 448     else
 449         must_exist "$dsaparam"
 450         (umask 077 && openssl gendsa -out "$1-privkey.pem" "$dsaparam") \
 451             1>&3 2>&3 || exit $?
 452     fi
 453     openssl req -config "$TMP/req.cnf" -new -text \
 454         -key "$1-privkey.pem" -out "$1-req.pem" 1>&3 2>&3
 455 }
 456
 457 sign_request() {
 458     must_exist "$1"
 459     must_not_exist "$2"
 460     pkidir_must_exist
 461
 462     (cd "$pkidir/${type}ca" &&
 463      openssl ca -config ca.cnf -batch -in /dev/stdin) \
 464         < "$1" > "$2.tmp$$" 2>&3
 465     mv "$2.tmp$$" "$2"
 466 }
 467
 468 glob() {
 469     files=$(echo $1)
 470     if test "$files" != "$1"; then
 471         echo "$files"
 472     fi
 473 }
 474
 475 exec 3>>$log || true
 476 if test "$command" = req; then
 477     one_arg
 478
 479     make_request "$arg1"
 480     fingerprint "$arg1-req.pem"
 481 elif test "$command" = sign; then
 482     one_or_two_args
 483     check_type "$arg2"
 484     verify_fingerprint "$arg1-req.pem"
 485
 486     sign_request "$arg1-req.pem" "$arg2-cert.pem"
 487 elif test "$command" = req+sign; then
 488     one_or_two_args
 489     check_type "$arg2"
 490
 491     pkidir_must_exist
 492     make_request "$arg1"
 493     sign_request "$arg1-req.pem" "$arg1-cert.pem"
 494     fingerprint "$arg1-req.pem"
 495 elif test "$command" = verify; then
 496     one_or_two_args
 497     must_exist "$arg1-cert.pem"
 498     check_type "$arg2"
 499
 500     pkidir_must_exist
 501     openssl verify -CAfile "$pkidir/${type}ca/cacert.pem" "$arg1-cert.pem"
 502 elif test "$command" = fingerprint; then
 503     one_arg
 504
 505     fingerprint "$arg1"
 506 elif test "$command" = self-sign; then
 507     one_arg
 508     must_exist "$arg1-req.pem"
 509     must_exist "$arg1-privkey.pem"
 510     must_not_exist "$arg1-cert.pem"
 511
 512     # Create both the private key and certificate with restricted permissions.
 513     (umask 077 && \
 514      openssl x509 -in "$arg1-req.pem" -out "$arg1-cert.pem.tmp" \
 515         -signkey "$arg1-privkey.pem" -req -text) 2>&3 || exit $?
 516
 517     # Reset the permissions on the certificate to the user's default.
 518     cat "$arg1-cert.pem.tmp" > "$arg1-cert.pem"
 519     rm -f "$arg1-cert.pem.tmp"
 520 else
 521     echo "$0: $command command unknown; use --help for help" >&2
 522     exit 1
 523 fi