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     # Create the CAs.
 197     for ca in controllerca switchca; do
 198         echo "Creating $ca..." >&2
 199         oldpwd=$PWD
 200         mkdir -p $ca
 201         cd $ca
 202
 203         mkdir -p certs crl newcerts
 204         mkdir -p -m 0700 private
 205         mkdir -p -m 0733 incoming
 206         touch index.txt
 207         test -e crlnumber || echo 01 > crlnumber
 208         test -e serial || echo 01 > serial
 209
 210         # Put DSA parameters in directory.
 211         if test $keytype = dsa && test ! -e dsaparam.pem; then
 212             cp ../dsaparam.pem .
 213         fi
 214
 215     # Write CA configuration file.
 216         if test ! -e ca.cnf; then
 217             sed "s/@ca@/$ca/g" > ca.cnf <<'EOF'
 218 [ req ]
 219 prompt = no
 220 distinguished_name = req_distinguished_name
 221
 222 [ req_distinguished_name ]
 223 C = US
 224 ST = CA
 225 L = Palo Alto
 226 O = Open vSwitch
 227 OU = @ca@
 228 CN = Open vSwitch @ca@ CA Certificate
 229
 230 [ ca ]
 231 default_ca = the_ca
 232
 233 [ the_ca ]
 234 dir            = .                     # top dir
 235 database       = $dir/index.txt        # index file.
 236 new_certs_dir  = $dir/newcerts         # new certs dir
 237 certificate    = $dir/cacert.pem       # The CA cert
 238 serial         = $dir/serial           # serial no file
 239 private_key    = $dir/private/cakey.pem# CA private key
 240 RANDFILE       = $dir/private/.rand    # random number file
 241 default_days   = 365                   # how long to certify for
 242 default_crl_days= 30                   # how long before next CRL
 243 default_md     = md5                   # md to use
 244 policy         = policy                # default policy
 245 email_in_dn    = no                    # Don't add the email into cert DN
 246 name_opt       = ca_default            # Subject name display option
 247 cert_opt       = ca_default            # Certificate display option
 248 copy_extensions = none                 # Don't copy extensions from request
 249
 250 # For the CA policy
 251 [ policy ]
 252 countryName             = optional
 253 stateOrProvinceName     = optional
 254 organizationName        = match
 255 organizationalUnitName  = optional
 256 commonName              = supplied
 257 emailAddress            = optional
 258 EOF
 259         fi
 260
 261         # Create certificate authority.
 262         if test $keytype = dsa; then
 263             newkey=dsa:dsaparam.pem
 264         else
 265             newkey=rsa:$bits
 266         fi
 267         openssl req -config ca.cnf -nodes \
 268             -newkey $newkey -keyout private/cakey.pem -out careq.pem \
 269             1>&3 2>&3
 270         openssl ca -config ca.cnf -create_serial -out cacert.pem \
 271             -days 1095 -batch -keyfile private/cakey.pem -selfsign \
 272             -infiles careq.pem 1>&3 2>&3
 273         chmod 0700 private/cakey.pem
 274
 275         cd "$oldpwd"
 276     done
 277     exit 0
 278 fi
 279
 280 one_arg() {
 281     if test -z "$arg1" || test -n "$arg2"; then
 282         echo "$0: $command must have exactly one argument; use --help for help" >&2
 283         exit 1
 284     fi
 285 }
 286
 287 zero_or_one_args() {
 288     if test -n "$arg2"; then
 289         echo "$0: $command must have zero or one arguments; use --help for help" >&2
 290         exit 1
 291     fi
 292 }
 293
 294 one_or_two_args() {
 295     if test -z "$arg1"; then
 296         echo "$0: $command must have one or two arguments; use --help for help" >&2
 297         exit 1
 298     fi
 299 }
 300
 301 must_not_exist() {
 302     if test -e "$1" && test "$force" != "yes"; then
 303         echo "$0: $1 already exists and --force not supplied" >&2
 304         exit 1
 305     fi
 306 }
 307
 308 resolve_prefix() {
 309     test -n "$type" || exit 123 # Forgot to call check_type?
 310
 311     case $1 in
 312         ????*)
 313             ;;
 314         *)
 315             echo "Prefix $arg1 is too short (less than 4 hex digits)"
 316             exit 0
 317             ;;
 318     esac
 319
 320     fingerprint=$(cd "$pkidir/${type}ca/incoming" && echo "$1"*-req.pem | sed 's/-req\.pem$//')
 321     case $fingerprint in
 322         "${1}*")
 323             echo "No certificate requests matching $1"
 324             exit 1
 325             ;;
 326         *" "*)
 327             echo "$1 matches more than one certificate request:"
 328             echo $fingerprint | sed 's/ /\
 329 /g'
 330             exit 1
 331             ;;
 332         *)
 333             # Nothing to do.
 334             ;;
 335     esac
 336     req="$pkidir/${type}ca/incoming/$fingerprint-req.pem"
 337     cert="$pkidir/${type}ca/certs/$fingerprint-cert.pem"
 338 }
 339
 340 make_tmpdir() {
 341     TMP=/tmp/ovs-pki.tmp$$
 342     rm -rf $TMP
 343     trap "rm -rf $TMP" 0
 344     mkdir -m 0700 $TMP
 345 }
 346
 347 fingerprint() {
 348     local file=$1
 349     local name=${1-$2}
 350     local date=$(date -r $file)
 351     local fingerprint
 352     if grep -q -e '-BEGIN CERTIFICATE-' "$file"; then
 353         fingerprint=$(openssl x509 -noout -in "$file" -fingerprint |
 354                       sed 's/SHA1 Fingerprint=//' | tr -d ':')
 355     else
 356         fingerprint=$(sha1sum "$file" | awk '{print $1}')
 357     fi
 358     printf "$name\\t$date\\n"
 359     case $file in
 360         $fingerprint*)
 361             printf "\\t(correct fingerprint in filename)\\n"
 362             ;;
 363         *)
 364             printf "\\tfingerprint $fingerprint\\n"
 365             ;;
 366     esac
 367 }
 368
 369 verify_fingerprint() {
 370     fingerprint "$@"
 371     if test $batch != yes; then
 372         echo "Does fingerprint match? (yes/no)"
 373         read answer
 374         if test "$answer" != yes; then
 375             echo "Match failure, aborting" >&2
 376             exit 1
 377         fi
 378     fi
 379 }
 380
 381 check_type() {
 382     if test x = x"$1"; then
 383         type=switch
 384     elif test "$1" = switch || test "$1" = controller; then
 385         type=$1
 386     else
 387         echo "$0: type argument must be 'switch' or 'controller'" >&2
 388         exit 1
 389     fi
 390 }
 391
 392 parse_age() {
 393     number=$(echo $1 | sed 's/^\([0-9]\+\)\([[:alpha:]]\+\)/\1/')
 394     unit=$(echo $1 | sed 's/^\([0-9]\+\)\([[:alpha:]]\+\)/\2/')
 395     case $unit in
 396         s)
 397             factor=1
 398             ;;
 399         min)
 400             factor=60
 401             ;;
 402         h)
 403             factor=3600
 404             ;;
 405         day)
 406             factor=86400
 407             ;;
 408         *)
 409             echo "$1: age not in the form Ns, Nmin, Nh, Nday (e.g. 1day)" >&2
 410             exit 1
 411             ;;
 412     esac
 413     echo $(($number * $factor))
 414 }
 415
 416 must_exist() {
 417     if test ! -e "$1"; then
 418         echo "$0: $1 does not exist" >&2
 419         exit 1
 420     fi
 421 }
 422
 423 pkidir_must_exist() {
 424     if test ! -e "$pkidir"; then
 425         echo "$0: $pkidir does not exist (need to run 'init' or use '--dir'?)" >&2
 426         exit 1
 427     elif test ! -d "$pkidir"; then
 428         echo "$0: $pkidir is not a directory" >&2
 429         exit 1
 430     fi
 431 }
 432
 433 make_request() {
 434     must_not_exist "$arg1-privkey.pem"
 435     must_not_exist "$arg1-req.pem"
 436     make_tmpdir
 437     cat > "$TMP/req.cnf" <<EOF
 438 [ req ]
 439 prompt = no
 440 distinguished_name = req_distinguished_name
 441
 442 [ req_distinguished_name ]
 443 C = US
 444 ST = CA
 445 L = Palo Alto
 446 O = Open vSwitch
 447 OU = Open vSwitch certifier
 448 CN = Open vSwitch certificate for $arg1
 449 EOF
 450     if test $keytype = rsa; then
 451         newkey=rsa:$bits
 452     else
 453         must_exist "$dsaparam"
 454         newkey=dsa:$dsaparam
 455     fi
 456     openssl req -config "$TMP/req.cnf" -text -nodes \
 457         -newkey $newkey -keyout "$1-privkey.pem" -out "$1-req.pem" 1>&3 2>&3
 458 }
 459
 460 sign_request() {
 461     must_exist "$1"
 462     must_not_exist "$2"
 463     pkidir_must_exist
 464
 465     (cd "$pkidir/${type}ca" &&
 466      openssl ca -config ca.cnf -batch -in /dev/stdin) \
 467         < "$1" > "$2.tmp$$" 2>&3
 468     mv "$2.tmp$$" "$2"
 469 }
 470
 471 glob() {
 472     local files=$(echo $1)
 473     if test "$files" != "$1"; then
 474         echo "$files"
 475     fi
 476 }
 477
 478 exec 3>>$log || true
 479 if test "$command" = req; then
 480     one_arg
 481
 482     make_request "$arg1"
 483     fingerprint "$arg1-req.pem"
 484 elif test "$command" = sign; then
 485     one_or_two_args
 486     check_type "$arg2"
 487     verify_fingerprint "$arg1-req.pem"
 488
 489     sign_request "$arg1-req.pem" "$arg2-cert.pem"
 490 elif test "$command" = req+sign; then
 491     one_or_two_args
 492     check_type "$arg2"
 493
 494     pkidir_must_exist
 495     make_request "$arg1"
 496     sign_request "$arg1-req.pem" "$arg1-cert.pem"
 497     fingerprint "$arg1-req.pem"
 498 elif test "$command" = verify; then
 499     one_or_two_args
 500     must_exist "$arg1-cert.pem"
 501     check_type "$arg2"
 502
 503     pkidir_must_exist
 504     openssl verify -CAfile "$pkidir/${type}ca/cacert.pem" "$arg1-cert.pem"
 505 elif test "$command" = fingerprint; then
 506     one_arg
 507
 508     fingerprint "$arg1"
 509 elif test "$command" = self-sign; then
 510     one_arg
 511     must_exist "$arg1-req.pem"
 512     must_exist "$arg1-privkey.pem"
 513     must_not_exist "$arg1-cert.pem"
 514
 515     openssl x509 -in "$arg1-req.pem" -out "$arg1-cert.pem" \
 516         -signkey "$arg1-privkey.pem" -req -text 2>&3
 517 elif test "$command" = ls; then
 518     check_type "$arg2"
 519
 520     cd "$pkidir/${type}ca/incoming"
 521     for file in $(glob "$arg1*-req.pem"); do
 522         fingerprint $file
 523     done
 524 elif test "$command" = flush; then
 525     check_type "$arg1"
 526
 527     rm -f "$pkidir/${type}ca/incoming/"*
 528 elif test "$command" = reject; then
 529     one_or_two_args
 530     check_type "$arg2"
 531     resolve_prefix "$arg1"
 532
 533     rm -f "$req"
 534 elif test "$command" = approve; then
 535     one_or_two_args
 536     check_type "$arg2"
 537     resolve_prefix "$arg1"
 538
 539     make_tmpdir
 540     cp "$req" "$TMP/$req"
 541     verify_fingerprint "$TMP/$req"
 542     sign_request "$TMP/$req"
 543     rm -f "$req" "$TMP/$req"
 544 elif test "$command" = prompt; then
 545     zero_or_one_args
 546     check_type "$arg1"
 547
 548     make_tmpdir
 549     cd "$pkidir/${type}ca/incoming"
 550     for req in $(glob "*-req.pem"); do
 551         cp "$req" "$TMP/$req"
 552
 553         cert=$(echo "$pkidir/${type}ca/certs/$req" |
 554                sed 's/-req.pem/-cert.pem/')
 555         if test -f $cert; then
 556             echo "Request $req already approved--dropping duplicate request"
 557             rm -f "$req" "$TMP/$req"
 558             continue
 559         fi
 560
 561         echo
 562         echo
 563         fingerprint "$TMP/$req" "$req"
 564         printf "Disposition for this request (skip/approve/reject)? "
 565         read answer
 566         case $answer in
 567             approve)
 568                 echo "Approving $req"
 569                 sign_request "$TMP/$req" "$cert"
 570                 rm -f "$req" "$TMP/$req"
 571                 ;;
 572             r*)
 573                 echo "Rejecting $req"
 574                 rm -f "$req" "$TMP/$req"
 575                 ;;
 576             *)
 577                 echo "Skipping $req"
 578                 ;;
 579         esac
 580     done
 581 elif test "$command" = expire; then
 582     zero_or_one_args
 583     cutoff=$(($(date +%s) - $(parse_age ${arg1-1day})))
 584     for type in switch controller; do
 585         cd "$pkidir/${type}ca/incoming" || exit 1
 586         for file in $(glob "*"); do
 587             time=$(date -r "$file" +%s)
 588             if test "$time" -lt "$cutoff"; then
 589                 rm -f "$file"
 590             fi
 591         done
 592     done
 593 else
 594     echo "$0: $command command unknown; use --help for help" >&2
 595     exit 1
 596 fi