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 <credentials/certificates/certificate.h>
  23 #include <credentials/certificates/x509.h>
  24 #include <credentials/certificates/pkcs10.h>
  25
  26 /**
  27  * Issue a certificate using a CA certificate and key
  28  */
  29 static int issue()
  30 {
  31         hash_algorithm_t digest = HASH_SHA1;
  32         certificate_t *cert_req = NULL, *cert = NULL, *ca =NULL;
  33         private_key_t *private = NULL;
  34         public_key_t *public = NULL;
  35         bool pkcs10 = FALSE;
  36         char *file = NULL, *dn = NULL, *hex = NULL, *cacert = NULL, *cakey = NULL;
  37         char *error = NULL;
  38         identification_t *id = NULL;
  39         linked_list_t *san, *cdps, *ocsp;
  40         int lifetime = 1080;
  41         int pathlen = X509_NO_PATH_LEN_CONSTRAINT;
  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         char *arg;
  48
  49         san = linked_list_create();
  50         cdps = linked_list_create();
  51         ocsp = linked_list_create();
  52
  53         while (TRUE)
  54         {
  55                 switch (command_getopt(&arg))
  56                 {
  57                         case 'h':
  58                                 goto usage;
  59                         case 't':
  60                                 if (streq(arg, "pkcs10"))
  61                                 {
  62                                         pkcs10 = TRUE;
  63                                 }
  64                                 else if (!streq(arg, "pub"))
  65                                 {
  66                                         error = "invalid input type";
  67                                         goto usage;
  68                                 }
  69                                 continue;
  70                         case 'g':
  71                                 digest = get_digest(arg);
  72                                 if (digest == HASH_UNKNOWN)
  73                                 {
  74                                         error = "invalid --digest type";
  75                                         goto usage;
  76                                 }
  77                                 continue;
  78                         case 'i':
  79                                 file = arg;
  80                                 continue;
  81                         case 'c':
  82                                 cacert = arg;
  83                                 continue;
  84                         case 'k':
  85                                 cakey = arg;
  86                                 continue;
  87                         case 'd':
  88                                 dn = arg;
  89                                 continue;
  90                         case 'a':
  91                                 san->insert_last(san, identification_create_from_string(arg));
  92                                 continue;
  93                         case 'l':
  94                                 lifetime = atoi(arg);
  95                                 if (!lifetime)
  96                                 {
  97                                         error = "invalid --lifetime value";
  98                                         goto usage;
  99                                 }
 100                                 continue;
 101                         case 's':
 102                                 hex = arg;
 103                                 continue;
 104                         case 'b':
 105                                 flags |= X509_CA;
 106                                 continue;
 107                         case 'p':
 108                                 pathlen = atoi(arg);
 109                                 continue;
 110                         case 'f':
 111                                 if (streq(arg, "serverAuth"))
 112                                 {
 113                                         flags |= X509_SERVER_AUTH;
 114                                 }
 115                                 else if (streq(arg, "clientAuth"))
 116                                 {
 117                                         flags |= X509_CLIENT_AUTH;
 118                                 }
 119                                 else if (streq(arg, "ocspSigning"))
 120                                 {
 121                                         flags |= X509_OCSP_SIGNER;
 122                                 }
 123                                 continue;
 124                         case 'u':
 125                                 cdps->insert_last(cdps, arg);
 126                                 continue;
 127                         case 'o':
 128                                 ocsp->insert_last(ocsp, arg);
 129                                 continue;
 130                         case EOF:
 131                                 break;
 132                         default:
 133                                 error = "invalid --issue option";
 134                                 goto usage;
 135                 }
 136                 break;
 137         }
 138
 139         if (!pkcs10 && !dn)
 140         {
 141                 error = "--dn is required";
 142                 goto usage;
 143         }
 144         if (!cacert)
 145         {
 146                 error = "--cacert is required";
 147                 goto usage;
 148         }
 149         if (!cakey)
 150         {
 151                 error = "--cakey is required";
 152                 goto usage;
 153         }
 154         if (dn)
 155         {
 156                 id = identification_create_from_string(dn);
 157                 if (id->get_type(id) != ID_DER_ASN1_DN)
 158                 {
 159                         error = "supplied --dn is not a distinguished name";
 160                         goto end;
 161                 }
 162         }
 163
 164         DBG2("Reading ca certificate:");
 165         ca = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
 166                                                         BUILD_FROM_FILE, cacert, BUILD_END);
 167         if (!ca)
 168         {
 169                 error = "parsing CA certificate failed";
 170                 goto end;
 171         }
 172         x509 = (x509_t*)ca;
 173         if (!(x509->get_flags(x509) & X509_CA))
 174         {
 175                 error = "CA certificate misses CA basicConstraint";
 176                 goto end;
 177         }
 178         public = ca->get_public_key(ca);
 179         if (!public)
 180         {
 181                 error = "extracting CA certificate public key failed";
 182                 goto end;
 183         }
 184
 185         DBG2("Reading ca private key:");
 186         private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
 187                                                                  public->get_type(public),
 188                                                                  BUILD_FROM_FILE, cakey, BUILD_END);
 189         if (!private)
 190         {
 191                 error = "parsing CA private key failed";
 192                 goto end;
 193         }
 194         if (!private->belongs_to(private, public))
 195         {
 196                 error = "CA private key does not match CA certificate";
 197                 goto end;
 198         }
 199         public->destroy(public);
 200
 201         if (hex)
 202         {
 203                 serial = chunk_from_hex(chunk_create(hex, strlen(hex)), NULL);
 204         }
 205         else
 206         {
 207                 rng_t *rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
 208
 209                 if (!rng)
 210                 {
 211                         error = "no random number generator found";
 212                         goto end;
 213                 }
 214                 rng->allocate_bytes(rng, 8, &serial);
 215                 rng->destroy(rng);
 216         }
 217
 218         if (pkcs10)
 219         {
 220                 enumerator_t *enumerator;
 221                 identification_t *subjectAltName;
 222                 pkcs10_t *req;
 223
 224                 DBG2("Reading certificate request");
 225                 if (file)
 226                 {
 227                         cert_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
 228                                                                                   CERT_PKCS10_REQUEST,
 229                                                                                   BUILD_FROM_FILE, file, BUILD_END);
 230                 }
 231                 else
 232                 {
 233                         cert_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
 234                                                                                   CERT_PKCS10_REQUEST,
 235                                                                                   BUILD_FROM_FD, 0, BUILD_END);
 236                 }
 237                 if (!cert_req)
 238                 {
 239                         error = "parsing certificate request failed";
 240                         goto end;
 241                 }
 242
 243                 /* If not set yet use subject from PKCS#10 certificate request as DN */
 244                 if (!id)
 245                 {
 246                         id = cert_req->get_subject(cert_req);
 247                         id = id->clone(id);
 248                 }
 249
 250                 /* Add subjectAltNames from PKCS#10 certificate request */
 251                 req = (pkcs10_t*)cert_req;
 252                 enumerator = req->create_subjectAltName_enumerator(req);
 253                 while (enumerator->enumerate(enumerator, &subjectAltName))
 254                 {
 255                         san->insert_last(san, subjectAltName->clone(subjectAltName));
 256                 }
 257                 enumerator->destroy(enumerator);
 258
 259                 /* Use public key from PKCS#10 certificate request */
 260                 public = cert_req->get_public_key(cert_req);
 261         }
 262         else
 263         {
 264                 DBG2("Reading public key:");
 265                 if (file)
 266                 {
 267                         public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
 268                                                                                 BUILD_FROM_FILE, file, BUILD_END);
 269                 }
 270                 else
 271                 {
 272                         public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
 273                                                                                  BUILD_FROM_FD, 0, BUILD_END);
 274                 }
 275         }
 276         if (!public)
 277         {
 278                 error = "parsing public key failed";
 279                 goto end;
 280         }
 281
 282         not_before = time(NULL);
 283         not_after = not_before + lifetime * 24 * 60 * 60;
 284
 285         cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
 286                                         BUILD_SIGNING_KEY, private, BUILD_SIGNING_CERT, ca,
 287                                         BUILD_PUBLIC_KEY, public, BUILD_SUBJECT, id,
 288                                         BUILD_NOT_BEFORE_TIME, not_before, BUILD_DIGEST_ALG, digest,
 289                                         BUILD_NOT_AFTER_TIME, not_after, BUILD_SERIAL, serial,
 290                                         BUILD_SUBJECT_ALTNAMES, san, BUILD_X509_FLAG, flags,
 291                                         BUILD_PATHLEN, pathlen,
 292                                         BUILD_CRL_DISTRIBUTION_POINTS, cdps,
 293                                         BUILD_OCSP_ACCESS_LOCATIONS, ocsp, BUILD_END);
 294         if (!cert)
 295         {
 296                 error = "generating certificate failed";
 297                 goto end;
 298         }
 299         encoding = cert->get_encoding(cert);
 300         if (!encoding.ptr)
 301         {
 302                 error = "encoding certificate failed";
 303                 goto end;
 304         }
 305         if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
 306         {
 307                 error = "writing certificate key failed";
 308                 goto end;
 309         }
 310
 311 end:
 312         DESTROY_IF(id);
 313         DESTROY_IF(cert_req);
 314         DESTROY_IF(cert);
 315         DESTROY_IF(ca);
 316         DESTROY_IF(public);
 317         DESTROY_IF(private);
 318         san->destroy_offset(san, offsetof(identification_t, destroy));
 319         cdps->destroy(cdps);
 320         ocsp->destroy(ocsp);
 321         free(encoding.ptr);
 322         free(serial.ptr);
 323
 324         if (error)
 325         {
 326                 fprintf(stderr, "%s\n", error);
 327                 return 1;
 328         }
 329         return 0;
 330
 331 usage:
 332         san->destroy_offset(san, offsetof(identification_t, destroy));
 333         cdps->destroy(cdps);
 334         ocsp->destroy(ocsp);
 335         return command_usage(error);
 336 }
 337
 338 /**
 339  * Register the command.
 340  */
 341 static void __attribute__ ((constructor))reg()
 342 {
 343         command_register((command_t) {
 344                 issue, 'i', "issue",
 345                 "issue a certificate using a CA certificate and key",
 346                 {"[--in file] [--type pub|pkcs10]",
 347                  " --cacert file --cakey file --dn subject-dn [--san subjectAltName]+",
 348                  "[--lifetime days] [--serial hex] [--crl uri]+ [--ocsp uri]+",
 349                  "[--ca] [--pathlen len] [--flag serverAuth|clientAuth|ocspSigning]+",
 350                  "[--digest md5|sha1|sha224|sha256|sha384|sha512]"},
 351                 {
 352                         {"help",        'h', 0, "show usage information"},
 353                         {"in",          'i', 1, "public key/request file to issue, default: stdin"},
 354                         {"type",        't', 1, "type of input, default: pub"},
 355                         {"cacert",      'c', 1, "CA certificate file"},
 356                         {"cakey",       'k', 1, "CA private key file"},
 357                         {"dn",          'd', 1, "distinguished name to include as subject"},
 358                         {"san",         'a', 1, "subjectAltName to include in certificate"},
 359                         {"lifetime",'l', 1, "days the certificate is valid, default: 1080"},
 360                         {"serial",      's', 1, "serial number in hex, default: random"},
 361                         {"ca",          'b', 0, "include CA basicConstraint, default: no"},
 362                         {"pathlen",     'p', 1, "set path length constraint"},
 363                         {"flag",        'f', 1, "include extendedKeyUsage flag"},
 364                         {"crl",         'u', 1, "CRL distribution point URI to include"},
 365                         {"ocsp",        'o', 1, "OCSP AuthorityInfoAccess URI to include"},
 366                         {"digest",      'g', 1, "digest for signature creation, default: sha1"},
 367                 }
 368         });
 369 }
 370