src/pki/commands/issue.c

   1 /*
   2  * Copyright (C) 2009 Martin Willi
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include <time.h>
  17
  18 #include "pki.h"
  19
  20 #include <debug.h>
  21 #include <utils/linked_list.h>
  22 #include <utils/optionsfrom.h>
  23 #include <credentials/certificates/certificate.h>
  24 #include <credentials/certificates/x509.h>
  25 #include <credentials/certificates/pkcs10.h>
  26
  27 /**
  28  * Issue a certificate using a CA certificate and key
  29  */
  30 static int issue(int argc, char *argv[])
  31 {
  32         hash_algorithm_t digest = HASH_SHA1;
  33         certificate_t *cert_req = NULL, *cert = NULL, *ca =NULL;
  34         private_key_t *private = NULL;
  35         public_key_t *public = NULL;
  36         bool pkcs10 = FALSE;
  37         char *file = NULL, *dn = NULL, *hex = NULL, *cacert = NULL, *cakey = NULL;
  38         char *error = NULL;
  39         identification_t *id = NULL;
  40         linked_list_t *san, *cdps, *ocsp;
  41         int lifetime = 1080;
  42         chunk_t serial = chunk_empty;
  43         chunk_t encoding = chunk_empty;
  44         time_t not_before, not_after;
  45         x509_flag_t flags = 0;
  46         x509_t *x509;
  47         options_t *options;
  48
  49         options = options_create();
  50         san = linked_list_create();
  51         cdps = linked_list_create();
  52         ocsp = linked_list_create();
  53
  54         while (TRUE)
  55         {
  56                 switch (getopt_long(argc, argv, command_optstring, command_opts, NULL))
  57                 {
  58                         case 'h':
  59                                 goto usage;
  60                         case 'v':
  61                                 dbg_level = atoi(optarg);
  62                                 continue;
  63                         case '+':
  64                                 if (!options->from(options, optarg, &argc, &argv, optind))
  65                                 {
  66                                         error = "invalid options file";
  67                                         goto usage;
  68                                 }
  69                                 continue;
  70                         case 't':
  71                                 if (streq(optarg, "pkcs10"))
  72                                 {
  73                                         pkcs10 = TRUE;
  74                                 }
  75                                 else if (!streq(optarg, "pub"))
  76                                 {
  77                                         error = "invalid input type";
  78                                         goto usage;
  79                                 }
  80                                 continue;
  81                         case 'g':
  82                                 digest = get_digest(optarg);
  83                                 if (digest == HASH_UNKNOWN)
  84                                 {
  85                                         error = "invalid --digest type";
  86                                         goto usage;
  87                                 }
  88                                 continue;
  89                         case 'i':
  90                                 file = optarg;
  91                                 continue;
  92                         case 'c':
  93                                 cacert = optarg;
  94                                 continue;
  95                         case 'k':
  96                                 cakey = optarg;
  97                                 continue;
  98                         case 'd':
  99                                 dn = optarg;
 100                                 continue;
 101                         case 'a':
 102                                 san->insert_last(san, identification_create_from_string(optarg));
 103                                 continue;
 104                         case 'l':
 105                                 lifetime = atoi(optarg);
 106                                 if (!lifetime)
 107                                 {
 108                                         error = "invalid --lifetime value";
 109                                         goto usage;
 110                                 }
 111                                 continue;
 112                         case 's':
 113                                 hex = optarg;
 114                                 continue;
 115                         case 'b':
 116                                 flags |= X509_CA;
 117                                 continue;
 118                         case 'u':
 119                                 cdps->insert_last(cdps, optarg);
 120                                 continue;
 121                         case 'o':
 122                                 ocsp->insert_last(ocsp, optarg);
 123                                 continue;
 124                         case EOF:
 125                                 break;
 126                         default:
 127                                 error = "invalid --issue option";
 128                                 goto usage;
 129                 }
 130                 break;
 131         }
 132
 133         if (!pkcs10 && !dn)
 134         {
 135                 error = "--dn is required";
 136                 goto usage;
 137         }
 138         if (!cacert)
 139         {
 140                 error = "--cacert is required";
 141                 goto usage;
 142         }
 143         if (!cakey)
 144         {
 145                 error = "--cakey is required";
 146                 goto usage;
 147         }
 148         if (dn)
 149         {
 150                 id = identification_create_from_string(dn);
 151                 if (id->get_type(id) != ID_DER_ASN1_DN)
 152                 {
 153                         error = "supplied --dn is not a distinguished name";
 154                         goto end;
 155                 }
 156         }
 157
 158         DBG2("Reading ca certificate:");
 159         ca = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
 160                                                         BUILD_FROM_FILE, cacert, BUILD_END);
 161         if (!ca)
 162         {
 163                 error = "parsing CA certificate failed";
 164                 goto end;
 165         }
 166         x509 = (x509_t*)ca;
 167         if (!(x509->get_flags(x509) & X509_CA))
 168         {
 169                 error = "CA certificate misses CA basicConstraint";
 170                 goto end;
 171         }
 172         public = ca->get_public_key(ca);
 173         if (!public)
 174         {
 175                 error = "extracting CA certificate public key failed";
 176                 goto end;
 177         }
 178
 179         DBG2("Reading ca private key:");
 180         private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
 181                                                                  public->get_type(public),
 182                                                                  BUILD_FROM_FILE, cakey, BUILD_END);
 183         if (!private)
 184         {
 185                 error = "parsing CA private key failed";
 186                 goto end;
 187         }
 188         if (!private->belongs_to(private, public))
 189         {
 190                 error = "CA private key does not match CA certificate";
 191                 goto end;
 192         }
 193         public->destroy(public);
 194
 195         if (hex)
 196         {
 197                 serial = chunk_from_hex(chunk_create(hex, strlen(hex)), NULL);
 198         }
 199         else
 200         {
 201                 rng_t *rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
 202
 203                 if (!rng)
 204                 {
 205                         error = "no random number generator found";
 206                         goto end;
 207                 }
 208                 rng->allocate_bytes(rng, 8, &serial);
 209                 rng->destroy(rng);
 210         }
 211
 212         if (pkcs10)
 213         {
 214                 enumerator_t *enumerator;
 215                 identification_t *subjectAltName;
 216                 pkcs10_t *req;
 217
 218                 DBG2("Reading certificate request");
 219                 if (file)
 220                 {
 221                         cert_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
 222                                                                                   CERT_PKCS10_REQUEST,
 223                                                                                   BUILD_FROM_FILE, file, BUILD_END);
 224                 }
 225                 else
 226                 {
 227                         cert_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
 228                                                                                   CERT_PKCS10_REQUEST,
 229                                                                                   BUILD_FROM_FD, 0, BUILD_END);
 230                 }
 231                 if (!cert_req)
 232                 {
 233                         error = "parsing certificate request failed";
 234                         goto end;
 235                 }
 236
 237                 /* If not set yet use subject from PKCS#10 certificate request as DN */
 238                 if (!id)
 239                 {
 240                         id = cert_req->get_subject(cert_req);
 241                         id = id->clone(id);
 242                 }
 243
 244                 /* Add subjectAltNames from PKCS#10 certificate request */
 245                 req = (pkcs10_t*)cert_req;
 246                 enumerator = req->create_subjectAltName_enumerator(req);
 247                 while (enumerator->enumerate(enumerator, &subjectAltName))
 248                 {
 249                         san->insert_last(san, subjectAltName->clone(subjectAltName));
 250                 }
 251                 enumerator->destroy(enumerator);
 252
 253                 /* Use public key from PKCS#10 certificate request */
 254                 public = cert_req->get_public_key(cert_req);
 255         }
 256         else
 257         {
 258                 DBG2("Reading public key:");
 259                 if (file)
 260                 {
 261                         public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
 262                                                                                 BUILD_FROM_FILE, file, BUILD_END);
 263                 }
 264                 else
 265                 {
 266                         public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
 267                                                                                  BUILD_FROM_FD, 0, BUILD_END);
 268                 }
 269         }
 270         if (!public)
 271         {
 272                 error = "parsing public key failed";
 273                 goto end;
 274         }
 275
 276         not_before = time(NULL);
 277         not_after = not_before + lifetime * 24 * 60 * 60;
 278
 279         cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
 280                                         BUILD_SIGNING_KEY, private, BUILD_SIGNING_CERT, ca,
 281                                         BUILD_PUBLIC_KEY, public, BUILD_SUBJECT, id,
 282                                         BUILD_NOT_BEFORE_TIME, not_before, BUILD_DIGEST_ALG, digest,
 283                                         BUILD_NOT_AFTER_TIME, not_after, BUILD_SERIAL, serial,
 284                                         BUILD_SUBJECT_ALTNAMES, san, BUILD_X509_FLAG, flags,
 285                                         BUILD_CRL_DISTRIBUTION_POINTS, cdps,
 286                                         BUILD_OCSP_ACCESS_LOCATIONS, ocsp, BUILD_END);
 287         if (!cert)
 288         {
 289                 error = "generating certificate failed";
 290                 goto end;
 291         }
 292         encoding = cert->get_encoding(cert);
 293         if (!encoding.ptr)
 294         {
 295                 error = "encoding certificate failed";
 296                 goto end;
 297         }
 298         if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
 299         {
 300                 error = "writing certificate key failed";
 301                 goto end;
 302         }
 303
 304 end:
 305         DESTROY_IF(id);
 306         DESTROY_IF(cert_req);
 307         DESTROY_IF(cert);
 308         DESTROY_IF(ca);
 309         DESTROY_IF(public);
 310         DESTROY_IF(private);
 311         san->destroy_offset(san, offsetof(identification_t, destroy));
 312         cdps->destroy(cdps);
 313         ocsp->destroy(ocsp);
 314         options->destroy(options);
 315         free(encoding.ptr);
 316         free(serial.ptr);
 317
 318         if (error)
 319         {
 320                 fprintf(stderr, "%s\n", error);
 321                 return 1;
 322         }
 323         return 0;
 324
 325 usage:
 326         san->destroy_offset(san, offsetof(identification_t, destroy));
 327         cdps->destroy(cdps);
 328         ocsp->destroy(ocsp);
 329         options->destroy(options);
 330         return command_usage(error);
 331 }
 332
 333 /**
 334  * Register the command.
 335  */
 336 static void __attribute__ ((constructor))reg()
 337 {
 338         command_register((command_t) {
 339                 issue, 'i', "issue",
 340                 "issue a certificate using a CA certificate and key",
 341                 {"[--in file] [--type pub|pkcs10]",
 342                  " --cacert file --cakey file --dn subject-dn [--san subjectAltName]+",
 343                  "[--lifetime days] [--serial hex] [--ca] [--crl uri]+ [--ocsp uri]+",
 344                  "[--digest md5|sha1|sha224|sha256|sha384|sha512]",
 345                  "[--options file]"},
 346                 {
 347                         {"help",        'h', 0, "show usage information"},
 348                         {"in",          'i', 1, "public key/request file to issue, default: stdin"},
 349                         {"type",        't', 1, "type of input, default: pub"},
 350                         {"cacert",      'c', 1, "CA certificate file"},
 351                         {"cakey",       'k', 1, "CA private key file"},
 352                         {"dn",          'd', 1, "distinguished name to include as subject"},
 353                         {"san",         'a', 1, "subjectAltName to include in certificate"},
 354                         {"lifetime",'l', 1, "days the certificate is valid, default: 1080"},
 355                         {"serial",      's', 1, "serial number in hex, default: random"},
 356                         {"ca",          'b', 0, "include CA basicConstraint, default: no"},
 357                         {"crl",         'u', 1, "CRL distribution point URI to include"},
 358                         {"ocsp",        'o', 1, "OCSP AuthorityInfoAccess URI to include"},
 359                         {"digest",      'g', 1, "digest for signature creation, default: sha1"},
 360                         {"debug",       'v', 1, "set debug level, default: 1"},
 361                         {"options",     '+', 1, "read command line options from file"},
 362                 }
 363         });
 364 }
 365