utilities/ovs-pki.in

   1 #! /bin/sh
   2
   3 # Copyright (c) 2008, 2009 Nicira Networks, 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 for option; do
  28     # This option-parsing mechanism borrowed from a Autoconf-generated
  29     # configure script under the following license:
  30
  31     # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
  32     # 2002, 2003, 2004, 2005, 2006, 2009 Free Software Foundation, Inc.
  33     # This configure script is free software; the Free Software Foundation
  34     # gives unlimited permission to copy, distribute and modify it.
  35
  36     # If the previous option needs an argument, assign it.
  37     if test -n "$prev"; then
  38         eval $prev=\$option
  39         prev=
  40         continue
  41     fi
  42     case $option in
  43         *=*) optarg=`expr "X$option" : '[^=]*=\(.*\)'` ;;
  44         *) optarg=yes ;;
  45     esac
  46
  47     case $dashdash$option in
  48         --)
  49             dashdash=yes ;;
  50         -h|--help)
  51             cat <<EOF
  52 ovs-pki, for managing a simple OpenFlow public key infrastructure
  53 usage: $0 [OPTION...] COMMAND [ARG...]
  54
  55 The valid stand-alone commands and their arguments are:
  56   init                 Initialize the PKI
  57   req NAME             Create new private key and certificate request
  58                        named NAME-privkey.pem and NAME-req.pem, resp.
  59   sign NAME [TYPE]     Sign switch certificate request NAME-req.pem,
  60                        producing certificate NAME-cert.pem
  61   req+sign NAME [TYPE] Combine the above two steps, producing all three files.
  62   verify NAME [TYPE]   Checks that NAME-cert.pem is a valid TYPE certificate
  63   fingerprint FILE     Prints the fingerprint for FILE
  64   self-sign NAME       Sign NAME-req.pem with NAME-privkey.pem,
  65                        producing self-signed certificate NAME-cert.pem
  66
  67 The following additional commands manage an online PKI:
  68   ls [PREFIX] [TYPE]   Lists incoming requests of the given TYPE, optionally
  69                        limited to those whose fingerprint begins with PREFIX
  70   flush [TYPE]         Rejects all incoming requests of the given TYPE
  71   reject PREFIX [TYPE] Rejects the incoming request(s) whose fingerprint begins
  72                        with PREFIX and has the given TYPE
  73   approve PREFIX [TYPE] Approves the incoming request whose fingerprint begins
  74                        with PREFIX and has the given TYPE
  75   expire [AGE]         Rejects all incoming requests older than AGE, in
  76                        one of the forms Ns, Nmin, Nh, Nday (default: 1day)
  77   prompt [TYPE]        Interactively prompts to accept or reject each incoming
  78                        request of the given TYPE
  79
  80 Each TYPE above is a certificate type: 'switch' (default) or 'controller'.
  81
  82 Options for 'init', 'req', and 'req+sign' only:
  83   -k, --key=rsa|dsa    Type of keys to use (default: rsa)
  84   -B, --bits=NBITS     Number of bits in keys (default: 2048).  For DSA keys,
  85                          this has an effect only on 'init'.
  86   -D, --dsaparam=FILE  File with DSA parameters (DSA only)
  87                          (default: dsaparam.pem within PKI directory)
  88 Options for use with the 'sign' and 'approve' commands:
  89   -b, --batch          Skip fingerprint verification
  90 Options that apply to any command:
  91   -d, --dir=DIR        Directory where the PKI is located
  92                          (default: $pkidir)
  93   -f, --force          Continue even if file or directory already exists
  94   -l, --log=FILE       Log openssl output to FILE (default: ovs-log.log)
  95   -h, --help           Print this usage message.
  96 EOF
  97             exit 0
  98             ;;
  99         --di*=*)
 100             pkidir=$optarg
 101             ;;
 102         --di*|-d)
 103             prev=pkidir
 104             ;;
 105         --k*=*)
 106             keytype=$optarg
 107             ;;
 108         --k*|-k)
 109             prev=keytype
 110             ;;
 111         --bi*=*)
 112             bits=$optarg
 113             ;;
 114         --bi*|-B)
 115             prev=bits
 116             ;;
 117         --ds*=*)
 118             dsaparam=$optarg
 119             ;;
 120         --ds*|-D)
 121             prev=dsaparam
 122             ;;
 123         --l*=*)
 124             log=$optarg
 125             ;;
 126         --l*|-l)
 127             prev=log
 128             ;;
 129         --force|-f)
 130             force=yes
 131             ;;
 132         --ba*|-b)
 133             batch=yes
 134             ;;
 135         -*)
 136             echo "unrecognized option $option" >&2
 137             exit 1
 138             ;;
 139         *)
 140             if test -z "$command"; then
 141                 command=$option
 142             elif test -z "${arg1+set}"; then
 143                 arg1=$option
 144             elif test -z "${arg2+set}"; then
 145                 arg2=$option
 146             else
 147                 echo "$option: only two arguments may be specified" >&2
 148                 exit 1
 149             fi
 150             ;;
 151     esac
 152     shift
 153 done
 154 if test -n "$prev"; then
 155     option=--`echo $prev | sed 's/_/-/g'`
 156     { echo "$as_me: error: missing argument to $option" >&2
 157         { (exit 1); exit 1; }; }
 158 fi
 159 if test -z "$command"; then
 160     echo "$0: missing command name; use --help for help" >&2
 161     exit 1
 162 fi
 163 if test "$keytype" != rsa && test "$keytype" != dsa; then
 164     echo "$0: argument to -k or --key must be rsa or dsa"
 165     exit 1
 166 fi
 167 if test "$bits" -lt 1024; then
 168     echo "$0: argument to -B or --bits must be at least 1024"
 169     exit 1
 170 fi
 171 if test -z "$dsaparam"; then
 172     dsaparam=$pkidir/dsaparam.pem
 173 fi
 174 case $log in
 175     /*) ;;
 176     *) $log="$PWD/$log" ;;
 177 esac
 178
 179 if test "$command" = "init"; then
 180     if test -e "$pkidir" && test "$force" != "yes"; then
 181         echo "$0: $pkidir already exists and --force not specified" >&2
 182         exit 1
 183     fi
 184
 185     if test ! -d "$pkidir"; then
 186         mkdir -p "$pkidir"
 187     fi
 188     cd "$pkidir"
 189     exec 3>>$log
 190
 191     if test $keytype = dsa && test ! -e dsaparam.pem; then
 192         echo "Generating DSA parameters, please wait..." >&2
 193         openssl dsaparam -out dsaparam.pem $bits 1>&3 2>&3
 194     fi
 195
 196     # Get the current date to add some uniqueness to this certificate
 197     curr_date=`date +"%Y %b %d %T"`
 198
 199     # Create the CAs.
 200     for ca in controllerca switchca; do
 201         echo "Creating $ca..." >&2
 202         oldpwd=$PWD
 203         mkdir -p $ca
 204         cd $ca
 205
 206         mkdir -p certs crl newcerts
 207         mkdir -p -m 0700 private
 208         mkdir -p -m 0733 incoming
 209         touch index.txt
 210         test -e crlnumber || echo 01 > crlnumber
 211         test -e serial || echo 01 > serial
 212
 213         # Put DSA parameters in directory.
 214         if test $keytype = dsa && test ! -e dsaparam.pem; then
 215             cp ../dsaparam.pem .
 216         fi
 217
 218         # Write CA configuration file.
 219         if test ! -e ca.cnf; then
 220             sed "s/@ca@/$ca/g;s/@curr_date@/$curr_date/g" > ca.cnf <<'EOF'
 221 [ req ]
 222 prompt = no
 223 distinguished_name = req_distinguished_name
 224
 225 [ req_distinguished_name ]
 226 C = US
 227 ST = CA
 228 L = Palo Alto
 229 O = Open vSwitch
 230 OU = @ca@
 231 CN = OVS @ca@ CA Certificate (@curr_date@)
 232
 233 [ ca ]
 234 default_ca = the_ca
 235
 236 [ the_ca ]
 237 dir            = .                     # top dir
 238 database       = $dir/index.txt        # index file.
 239 new_certs_dir  = $dir/newcerts         # new certs dir
 240 certificate    = $dir/cacert.pem       # The CA cert
 241 serial         = $dir/serial           # serial no file
 242 private_key    = $dir/private/cakey.pem# CA private key
 243 RANDFILE       = $dir/private/.rand    # random number file
 244 default_days   = 365                   # how long to certify for
 245 default_crl_days= 30                   # how long before next CRL
 246 default_md     = md5                   # md to use
 247 policy         = policy                # default policy
 248 email_in_dn    = no                    # Don't add the email into cert DN
 249 name_opt       = ca_default            # Subject name display option
 250 cert_opt       = ca_default            # Certificate display option
 251 copy_extensions = none                 # Don't copy extensions from request
 252
 253 # For the CA policy
 254 [ policy ]
 255 countryName             = optional
 256 stateOrProvinceName     = optional
 257 organizationName        = match
 258 organizationalUnitName  = optional
 259 commonName              = supplied
 260 emailAddress            = optional
 261 EOF
 262         fi
 263
 264         # Create certificate authority.
 265         if test $keytype = dsa; then
 266             newkey=dsa:dsaparam.pem
 267         else
 268             newkey=rsa:$bits
 269         fi
 270         openssl req -config ca.cnf -nodes \
 271             -newkey $newkey -keyout private/cakey.pem -out careq.pem \
 272             1>&3 2>&3
 273         openssl ca -config ca.cnf -create_serial -out cacert.pem \
 274             -days 2191 -batch -keyfile private/cakey.pem -selfsign \
 275             -infiles careq.pem 1>&3 2>&3
 276         chmod 0700 private/cakey.pem
 277
 278         cd "$oldpwd"
 279     done
 280     exit 0
 281 fi
 282
 283 one_arg() {
 284     if test -z "$arg1" || test -n "$arg2"; then
 285         echo "$0: $command must have exactly one argument; use --help for help" >&2
 286         exit 1
 287     fi
 288 }
 289
 290 zero_or_one_args() {
 291     if test -n "$arg2"; then
 292         echo "$0: $command must have zero or one arguments; use --help for help" >&2
 293         exit 1
 294     fi
 295 }
 296
 297 one_or_two_args() {
 298     if test -z "$arg1"; then
 299         echo "$0: $command must have one or two arguments; use --help for help" >&2
 300         exit 1
 301     fi
 302 }
 303
 304 must_not_exist() {
 305     if test -e "$1" && test "$force" != "yes"; then
 306         echo "$0: $1 already exists and --force not supplied" >&2
 307         exit 1
 308     fi
 309 }
 310
 311 resolve_prefix() {
 312     test -n "$type" || exit 123 # Forgot to call check_type?
 313
 314     case $1 in
 315         ????*)
 316             ;;
 317         *)
 318             echo "Prefix $arg1 is too short (less than 4 hex digits)"
 319             exit 0
 320             ;;
 321     esac
 322
 323     fingerprint=$(cd "$pkidir/${type}ca/incoming" && echo "$1"*-req.pem | sed 's/-req\.pem$//')
 324     case $fingerprint in
 325         "${1}*")
 326             echo "No certificate requests matching $1"
 327             exit 1
 328             ;;
 329         *" "*)
 330             echo "$1 matches more than one certificate request:"
 331             echo $fingerprint | sed 's/ /\
 332 /g'
 333             exit 1
 334             ;;
 335         *)
 336             # Nothing to do.
 337             ;;
 338     esac
 339     req="$pkidir/${type}ca/incoming/$fingerprint-req.pem"
 340     cert="$pkidir/${type}ca/certs/$fingerprint-cert.pem"
 341 }
 342
 343 make_tmpdir() {
 344     TMP=/tmp/ovs-pki.tmp$$
 345     rm -rf $TMP
 346     trap "rm -rf $TMP" 0
 347     mkdir -m 0700 $TMP
 348 }
 349
 350 fingerprint() {
 351     local file=$1
 352     local name=${1-$2}
 353     local date=$(date -r $file)
 354     local fingerprint
 355     if grep -q -e '-BEGIN CERTIFICATE-' "$file"; then
 356         fingerprint=$(openssl x509 -noout -in "$file" -fingerprint |
 357                       sed 's/SHA1 Fingerprint=//' | tr -d ':')
 358     else
 359         fingerprint=$(sha1sum "$file" | awk '{print $1}')
 360     fi
 361     printf "$name\\t$date\\n"
 362     case $file in
 363         $fingerprint*)
 364             printf "\\t(correct fingerprint in filename)\\n"
 365             ;;
 366         *)
 367             printf "\\tfingerprint $fingerprint\\n"
 368             ;;
 369     esac
 370 }
 371
 372 verify_fingerprint() {
 373     fingerprint "$@"
 374     if test $batch != yes; then
 375         echo "Does fingerprint match? (yes/no)"
 376         read answer
 377         if test "$answer" != yes; then
 378             echo "Match failure, aborting" >&2
 379             exit 1
 380         fi
 381     fi
 382 }
 383
 384 check_type() {
 385     if test x = x"$1"; then
 386         type=switch
 387     elif test "$1" = switch || test "$1" = controller; then
 388         type=$1
 389     else
 390         echo "$0: type argument must be 'switch' or 'controller'" >&2
 391         exit 1
 392     fi
 393 }
 394
 395 parse_age() {
 396     number=$(echo $1 | sed 's/^\([0-9]\+\)\([[:alpha:]]\+\)/\1/')
 397     unit=$(echo $1 | sed 's/^\([0-9]\+\)\([[:alpha:]]\+\)/\2/')
 398     case $unit in
 399         s)
 400             factor=1
 401             ;;
 402         min)
 403             factor=60
 404             ;;
 405         h)
 406             factor=3600
 407             ;;
 408         day)
 409             factor=86400
 410             ;;
 411         *)
 412             echo "$1: age not in the form Ns, Nmin, Nh, Nday (e.g. 1day)" >&2
 413             exit 1
 414             ;;
 415     esac
 416     echo $(($number * $factor))
 417 }
 418
 419 must_exist() {
 420     if test ! -e "$1"; then
 421         echo "$0: $1 does not exist" >&2
 422         exit 1
 423     fi
 424 }
 425
 426 pkidir_must_exist() {
 427     if test ! -e "$pkidir"; then
 428         echo "$0: $pkidir does not exist (need to run 'init' or use '--dir'?)" >&2
 429         exit 1
 430     elif test ! -d "$pkidir"; then
 431         echo "$0: $pkidir is not a directory" >&2
 432         exit 1
 433     fi
 434 }
 435
 436 make_request() {
 437     must_not_exist "$arg1-privkey.pem"
 438     must_not_exist "$arg1-req.pem"
 439     make_tmpdir
 440     cat > "$TMP/req.cnf" <<EOF
 441 [ req ]
 442 prompt = no
 443 distinguished_name = req_distinguished_name
 444
 445 [ req_distinguished_name ]
 446 C = US
 447 ST = CA
 448 L = Palo Alto
 449 O = Open vSwitch
 450 OU = Open vSwitch certifier
 451 CN = Open vSwitch certificate for $arg1
 452 EOF
 453     if test $keytype = rsa; then
 454         newkey=rsa:$bits
 455     else
 456         must_exist "$dsaparam"
 457         newkey=dsa:$dsaparam
 458     fi
 459     openssl req -config "$TMP/req.cnf" -text -nodes \
 460         -newkey $newkey -keyout "$1-privkey.pem" -out "$1-req.pem" 1>&3 2>&3
 461 }
 462
 463 sign_request() {
 464     must_exist "$1"
 465     must_not_exist "$2"
 466     pkidir_must_exist
 467
 468     (cd "$pkidir/${type}ca" &&
 469      openssl ca -config ca.cnf -batch -in /dev/stdin) \
 470         < "$1" > "$2.tmp$$" 2>&3
 471     mv "$2.tmp$$" "$2"
 472 }
 473
 474 glob() {
 475     local files=$(echo $1)
 476     if test "$files" != "$1"; then
 477         echo "$files"
 478     fi
 479 }
 480
 481 exec 3>>$log || true
 482 if test "$command" = req; then
 483     one_arg
 484
 485     make_request "$arg1"
 486     fingerprint "$arg1-req.pem"
 487 elif test "$command" = sign; then
 488     one_or_two_args
 489     check_type "$arg2"
 490     verify_fingerprint "$arg1-req.pem"
 491
 492     sign_request "$arg1-req.pem" "$arg2-cert.pem"
 493 elif test "$command" = req+sign; then
 494     one_or_two_args
 495     check_type "$arg2"
 496
 497     pkidir_must_exist
 498     make_request "$arg1"
 499     sign_request "$arg1-req.pem" "$arg1-cert.pem"
 500     fingerprint "$arg1-req.pem"
 501 elif test "$command" = verify; then
 502     one_or_two_args
 503     must_exist "$arg1-cert.pem"
 504     check_type "$arg2"
 505
 506     pkidir_must_exist
 507     openssl verify -CAfile "$pkidir/${type}ca/cacert.pem" "$arg1-cert.pem"
 508 elif test "$command" = fingerprint; then
 509     one_arg
 510
 511     fingerprint "$arg1"
 512 elif test "$command" = self-sign; then
 513     one_arg
 514     must_exist "$arg1-req.pem"
 515     must_exist "$arg1-privkey.pem"
 516     must_not_exist "$arg1-cert.pem"
 517
 518     openssl x509 -in "$arg1-req.pem" -out "$arg1-cert.pem" \
 519         -signkey "$arg1-privkey.pem" -req -text 2>&3
 520 elif test "$command" = ls; then
 521     check_type "$arg2"
 522
 523     cd "$pkidir/${type}ca/incoming"
 524     for file in $(glob "$arg1*-req.pem"); do
 525         fingerprint $file
 526     done
 527 elif test "$command" = flush; then
 528     check_type "$arg1"
 529
 530     rm -f "$pkidir/${type}ca/incoming/"*
 531 elif test "$command" = reject; then
 532     one_or_two_args
 533     check_type "$arg2"
 534     resolve_prefix "$arg1"
 535
 536     rm -f "$req"
 537 elif test "$command" = approve; then
 538     one_or_two_args
 539     check_type "$arg2"
 540     resolve_prefix "$arg1"
 541
 542     make_tmpdir
 543     cp "$req" "$TMP/$req"
 544     verify_fingerprint "$TMP/$req"
 545     sign_request "$TMP/$req"
 546     rm -f "$req" "$TMP/$req"
 547 elif test "$command" = prompt; then
 548     zero_or_one_args
 549     check_type "$arg1"
 550
 551     make_tmpdir
 552     cd "$pkidir/${type}ca/incoming"
 553     for req in $(glob "*-req.pem"); do
 554         cp "$req" "$TMP/$req"
 555
 556         cert=$(echo "$pkidir/${type}ca/certs/$req" |
 557                sed 's/-req.pem/-cert.pem/')
 558         if test -f $cert; then
 559             echo "Request $req already approved--dropping duplicate request"
 560             rm -f "$req" "$TMP/$req"
 561             continue
 562         fi
 563
 564         echo
 565         echo
 566         fingerprint "$TMP/$req" "$req"
 567         printf "Disposition for this request (skip/approve/reject)? "
 568         read answer
 569         case $answer in
 570             approve)
 571                 echo "Approving $req"
 572                 sign_request "$TMP/$req" "$cert"
 573                 rm -f "$req" "$TMP/$req"
 574                 ;;
 575             r*)
 576                 echo "Rejecting $req"
 577                 rm -f "$req" "$TMP/$req"
 578                 ;;
 579             *)
 580                 echo "Skipping $req"
 581                 ;;
 582         esac
 583     done
 584 elif test "$command" = expire; then
 585     zero_or_one_args
 586     cutoff=$(($(date +%s) - $(parse_age ${arg1-1day})))
 587     for type in switch controller; do
 588         cd "$pkidir/${type}ca/incoming" || exit 1
 589         for file in $(glob "*"); do
 590             time=$(date -r "$file" +%s)
 591             if test "$time" -lt "$cutoff"; then
 592                 rm -f "$file"
 593             fi
 594         done
 595     done
 596 else
 597     echo "$0: $command command unknown; use --help for help" >&2
 598     exit 1
 599 fi