src/pki/commands/self.c

   1 /*
   2  * Copyright (C) 2009 Martin Willi
   3  * Copyright (C) 2015-2017 Andreas Steffen
   4  * HSR Hochschule fuer Technik Rapperswil
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  */
  16
  17 #include <time.h>
  18 #include <errno.h>
  19
  20 #include "pki.h"
  21
  22 #include <collections/linked_list.h>
  23 #include <credentials/certificates/certificate.h>
  24 #include <credentials/certificates/x509.h>
  25 #include <selectors/traffic_selector.h>
  26 #include <asn1/asn1.h>
  27
  28 /**
  29  * Free cert policy with OID
  30  */
  31 static void destroy_cert_policy(x509_cert_policy_t *policy)
  32 {
  33         free(policy->oid.ptr);
  34         free(policy);
  35 }
  36
  37 /**
  38  * Free policy mapping
  39  */
  40 static void destroy_policy_mapping(x509_policy_mapping_t *mapping)
  41 {
  42         free(mapping->issuer.ptr);
  43         free(mapping->subject.ptr);
  44         free(mapping);
  45 }
  46
  47 /**
  48  * Create a self signed certificate.
  49  */
  50 static int self()
  51 {
  52         cred_encoding_type_t form = CERT_ASN1_DER;
  53         key_type_t type = KEY_ANY;
  54         hash_algorithm_t digest = HASH_UNKNOWN;
  55         signature_params_t *scheme = NULL;
  56         certificate_t *cert = NULL;
  57         private_key_t *private = NULL;
  58         public_key_t *public = NULL;
  59         char *file = NULL, *dn = NULL, *hex = NULL, *error = NULL, *keyid = NULL;
  60         identification_t *id = NULL;
  61         linked_list_t *san, *ocsp, *permitted, *excluded, *policies, *mappings;
  62         linked_list_t *addrblocks;
  63         int pathlen = X509_NO_CONSTRAINT, inhibit_any = X509_NO_CONSTRAINT;
  64         int inhibit_mapping = X509_NO_CONSTRAINT;
  65         int require_explicit = X509_NO_CONSTRAINT;
  66         chunk_t serial = chunk_empty;
  67         chunk_t encoding = chunk_empty;
  68         time_t not_before, not_after, lifetime = 1095 * 24 * 60 * 60;
  69         char *datenb = NULL, *datena = NULL, *dateform = NULL;
  70         x509_flag_t flags = 0;
  71         x509_cert_policy_t *policy = NULL;
  72         traffic_selector_t *ts;
  73         char *arg;
  74         bool pss = FALSE;
  75
  76         san = linked_list_create();
  77         ocsp = linked_list_create();
  78         permitted = linked_list_create();
  79         excluded = linked_list_create();
  80         policies = linked_list_create();
  81         mappings = linked_list_create();
  82         addrblocks = linked_list_create();
  83
  84         while (TRUE)
  85         {
  86                 switch (command_getopt(&arg))
  87                 {
  88                         case 'h':
  89                                 goto usage;
  90                         case 't':
  91                                 if (streq(arg, "rsa"))
  92                                 {
  93                                         type = KEY_RSA;
  94                                 }
  95                                 else if (streq(arg, "ecdsa"))
  96                                 {
  97                                         type = KEY_ECDSA;
  98                                 }
  99                                 else if (streq(arg, "ed25519"))
 100                                 {
 101                                         type = KEY_ED25519;
 102                                 }
 103                                 else if (streq(arg, "bliss"))
 104                                 {
 105                                         type = KEY_BLISS;
 106                                 }
 107                                 else if (streq(arg, "priv"))
 108                                 {
 109                                         type = KEY_ANY;
 110                                 }
 111                                 else
 112                                 {
 113                                         error = "invalid input type";
 114                                         goto usage;
 115                                 }
 116                                 continue;
 117                         case 'g':
 118                                 if (!enum_from_name(hash_algorithm_short_names, arg, &digest))
 119                                 {
 120                                         error = "invalid --digest type";
 121                                         goto usage;
 122                                 }
 123                                 continue;
 124                         case 'R':
 125                                 if (streq(arg, "pss"))
 126                                 {
 127                                         pss = TRUE;
 128                                 }
 129                                 else if (!streq(arg, "pkcs1"))
 130                                 {
 131                                         error = "invalid RSA padding";
 132                                         goto usage;
 133                                 }
 134                                 continue;
 135                         case 'i':
 136                                 file = arg;
 137                                 continue;
 138                         case 'x':
 139                                 keyid = arg;
 140                                 continue;
 141                         case 'd':
 142                                 dn = arg;
 143                                 continue;
 144                         case 'a':
 145                                 san->insert_last(san, identification_create_from_string(arg));
 146                                 continue;
 147                         case 'l':
 148                                 lifetime = atoi(arg) * 24 * 60 * 60;
 149                                 if (!lifetime)
 150                                 {
 151                                         error = "invalid --lifetime value";
 152                                         goto usage;
 153                                 }
 154                                 continue;
 155                         case 'D':
 156                                 dateform = arg;
 157                                 continue;
 158                         case 'F':
 159                                 datenb = arg;
 160                                 continue;
 161                         case 'T':
 162                                 datena = arg;
 163                                 continue;
 164                         case 's':
 165                                 hex = arg;
 166                                 continue;
 167                         case 'b':
 168                                 flags |= X509_CA;
 169                                 continue;
 170                         case 'p':
 171                                 pathlen = atoi(arg);
 172                                 continue;
 173                         case 'B':
 174                                 ts = parse_ts(arg);
 175                                 if (!ts)
 176                                 {
 177                                         error = "invalid addressBlock";
 178                                         goto usage;
 179                                 }
 180                                 addrblocks->insert_last(addrblocks, ts);
 181                                 continue;
 182                         case 'n':
 183                                 permitted->insert_last(permitted,
 184                                                                            identification_create_from_string(arg));
 185                                 continue;
 186                         case 'N':
 187                                 excluded->insert_last(excluded,
 188                                                                           identification_create_from_string(arg));
 189                                 continue;
 190                         case 'P':
 191                         {
 192                                 chunk_t oid;
 193
 194                                 oid = asn1_oid_from_string(arg);
 195                                 if (!oid.len)
 196                                 {
 197                                         error = "--cert-policy OID invalid";
 198                                         goto usage;
 199                                 }
 200                                 INIT(policy,
 201                                         .oid = oid,
 202                                 );
 203                                 policies->insert_last(policies, policy);
 204                                 continue;
 205                         }
 206                         case 'C':
 207                                 if (!policy)
 208                                 {
 209                                         error = "--cps-uri must follow a --cert-policy";
 210                                         goto usage;
 211                                 }
 212                                 policy->cps_uri = arg;
 213                                 continue;
 214                         case 'U':
 215                                 if (!policy)
 216                                 {
 217                                         error = "--user-notice must follow a --cert-policy";
 218                                         goto usage;
 219                                 }
 220                                 policy->unotice_text = arg;
 221                                 continue;
 222                         case 'M':
 223                         {
 224                                 char *pos = strchr(arg, ':');
 225                                 x509_policy_mapping_t *mapping;
 226                                 chunk_t subject_oid, issuer_oid;
 227
 228                                 if (pos)
 229                                 {
 230                                         *pos++ = '\0';
 231                                         issuer_oid = asn1_oid_from_string(arg);
 232                                         subject_oid = asn1_oid_from_string(pos);
 233                                 }
 234                                 if (!pos || !issuer_oid.len || !subject_oid.len)
 235                                 {
 236                                         error = "--policy-map OIDs invalid";
 237                                         goto usage;
 238                                 }
 239                                 INIT(mapping,
 240                                         .issuer = issuer_oid,
 241                                         .subject = subject_oid,
 242                                 );
 243                                 mappings->insert_last(mappings, mapping);
 244                                 continue;
 245                         }
 246                         case 'E':
 247                                 require_explicit = atoi(arg);
 248                                 continue;
 249                         case 'H':
 250                                 inhibit_mapping = atoi(arg);
 251                                 continue;
 252                         case 'A':
 253                                 inhibit_any = atoi(arg);
 254                                 continue;
 255                         case 'e':
 256                                 if (streq(arg, "serverAuth"))
 257                                 {
 258                                         flags |= X509_SERVER_AUTH;
 259                                 }
 260                                 else if (streq(arg, "clientAuth"))
 261                                 {
 262                                         flags |= X509_CLIENT_AUTH;
 263                                 }
 264                                 else if (streq(arg, "ikeIntermediate"))
 265                                 {
 266                                         flags |= X509_IKE_INTERMEDIATE;
 267                                 }
 268                                 else if (streq(arg, "crlSign"))
 269                                 {
 270                                         flags |= X509_CRL_SIGN;
 271                                 }
 272                                 else if (streq(arg, "ocspSigning"))
 273                                 {
 274                                         flags |= X509_OCSP_SIGNER;
 275                                 }
 276                                 else if (streq(arg, "msSmartcardLogon"))
 277                                 {
 278                                         flags |= X509_MS_SMARTCARD_LOGON;
 279                                 }
 280                                 continue;
 281                         case 'f':
 282                                 if (!get_form(arg, &form, CRED_CERTIFICATE))
 283                                 {
 284                                         error = "invalid output format";
 285                                         goto usage;
 286                                 }
 287                                 continue;
 288                         case 'o':
 289                                 ocsp->insert_last(ocsp, arg);
 290                                 continue;
 291                         case EOF:
 292                                 break;
 293                         default:
 294                                 error = "invalid --self option";
 295                                 goto usage;
 296                 }
 297                 break;
 298         }
 299
 300         if (!dn)
 301         {
 302                 error = "--dn is required";
 303                 goto usage;
 304         }
 305         if (!calculate_lifetime(dateform, datenb, datena, lifetime,
 306                                                         &not_before, &not_after))
 307         {
 308                 error = "invalid --not-before/after datetime";
 309                 goto usage;
 310         }
 311         id = identification_create_from_string(dn);
 312         if (id->get_type(id) != ID_DER_ASN1_DN)
 313         {
 314                 error = "supplied --dn is not a distinguished name";
 315                 goto end;
 316         }
 317         if (file)
 318         {
 319                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
 320                                                                          BUILD_FROM_FILE, file, BUILD_END);
 321         }
 322         else if (keyid)
 323         {
 324                 chunk_t chunk;
 325
 326                 chunk = chunk_from_hex(chunk_create(keyid, strlen(keyid)), NULL);
 327                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_ANY,
 328                                                                          BUILD_PKCS11_KEYID, chunk, BUILD_END);
 329                 free(chunk.ptr);
 330         }
 331         else
 332         {
 333                 chunk_t chunk;
 334
 335                 set_file_mode(stdin, CERT_ASN1_DER);
 336                 if (!chunk_from_fd(0, &chunk))
 337                 {
 338                         fprintf(stderr, "%s: ", strerror(errno));
 339                         error = "reading private key failed";
 340                         goto end;
 341                 }
 342                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
 343                                                                          BUILD_BLOB, chunk, BUILD_END);
 344                 free(chunk.ptr);
 345         }
 346         if (!private)
 347         {
 348                 error = "loading private key failed";
 349                 goto end;
 350         }
 351         public = private->get_public_key(private);
 352         if (!public)
 353         {
 354                 error = "extracting public key failed";
 355                 goto end;
 356         }
 357         if (hex)
 358         {
 359                 serial = chunk_from_hex(chunk_create(hex, strlen(hex)), NULL);
 360         }
 361         else
 362         {
 363                 rng_t *rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
 364
 365                 if (!rng)
 366                 {
 367                         error = "no random number generator found";
 368                         goto end;
 369                 }
 370                 if (!rng_allocate_bytes_not_zero(rng, 8, &serial, FALSE))
 371                 {
 372                         error = "failed to generate serial number";
 373                         rng->destroy(rng);
 374                         goto end;
 375                 }
 376                 serial.ptr[0] &= 0x7F;
 377                 rng->destroy(rng);
 378         }
 379         scheme = get_signature_scheme(private, digest, pss);
 380
 381         cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
 382                                                 BUILD_SIGNING_KEY, private, BUILD_PUBLIC_KEY, public,
 383                                                 BUILD_SUBJECT, id, BUILD_NOT_BEFORE_TIME, not_before,
 384                                                 BUILD_NOT_AFTER_TIME, not_after, BUILD_SERIAL, serial,
 385                                                 BUILD_SIGNATURE_SCHEME, scheme, BUILD_X509_FLAG, flags,
 386                                                 BUILD_PATHLEN, pathlen, BUILD_SUBJECT_ALTNAMES, san,
 387                                                 BUILD_ADDRBLOCKS, addrblocks,
 388                                                 BUILD_OCSP_ACCESS_LOCATIONS, ocsp,
 389                                                 BUILD_PERMITTED_NAME_CONSTRAINTS, permitted,
 390                                                 BUILD_EXCLUDED_NAME_CONSTRAINTS, excluded,
 391                                                 BUILD_CERTIFICATE_POLICIES, policies,
 392                                                 BUILD_POLICY_MAPPINGS, mappings,
 393                                                 BUILD_POLICY_REQUIRE_EXPLICIT, require_explicit,
 394                                                 BUILD_POLICY_INHIBIT_MAPPING, inhibit_mapping,
 395                                                 BUILD_POLICY_INHIBIT_ANY, inhibit_any,
 396                                                 BUILD_END);
 397         if (!cert)
 398         {
 399                 error = "generating certificate failed";
 400                 goto end;
 401         }
 402         if (!cert->get_encoding(cert, form, &encoding))
 403         {
 404                 error = "encoding certificate failed";
 405                 goto end;
 406         }
 407         set_file_mode(stdout, form);
 408         if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
 409         {
 410                 error = "writing certificate key failed";
 411                 goto end;
 412         }
 413
 414 end:
 415         DESTROY_IF(id);
 416         DESTROY_IF(cert);
 417         DESTROY_IF(public);
 418         DESTROY_IF(private);
 419         san->destroy_offset(san, offsetof(identification_t, destroy));
 420         permitted->destroy_offset(permitted, offsetof(identification_t, destroy));
 421         excluded->destroy_offset(excluded, offsetof(identification_t, destroy));
 422         addrblocks->destroy_offset(addrblocks, offsetof(traffic_selector_t, destroy));
 423         policies->destroy_function(policies, (void*)destroy_cert_policy);
 424         mappings->destroy_function(mappings, (void*)destroy_policy_mapping);
 425         ocsp->destroy(ocsp);
 426         signature_params_destroy(scheme);
 427         free(encoding.ptr);
 428         free(serial.ptr);
 429
 430         if (error)
 431         {
 432                 fprintf(stderr, "%s\n", error);
 433                 return 1;
 434         }
 435         return 0;
 436
 437 usage:
 438         san->destroy_offset(san, offsetof(identification_t, destroy));
 439         permitted->destroy_offset(permitted, offsetof(identification_t, destroy));
 440         excluded->destroy_offset(excluded, offsetof(identification_t, destroy));
 441         addrblocks->destroy_offset(addrblocks, offsetof(traffic_selector_t, destroy));
 442         policies->destroy_function(policies, (void*)destroy_cert_policy);
 443         mappings->destroy_function(mappings, (void*)destroy_policy_mapping);
 444         ocsp->destroy(ocsp);
 445         return command_usage(error);
 446 }
 447
 448 /**
 449  * Register the command.
 450  */
 451 static void __attribute__ ((constructor))reg()
 452 {
 453         command_register((command_t) {
 454                 self, 's', "self",
 455                 "create a self signed certificate",
 456                 {"[--in file|--keyid hex] [--type rsa|ecdsa|ed25519|bliss|priv]",
 457                  " --dn distinguished-name [--san subjectAltName]+",
 458                  "[--lifetime days] [--serial hex] [--ca] [--ocsp uri]+",
 459                  "[--flag serverAuth|clientAuth|crlSign|ocspSigning|msSmartcardLogon]+",
 460                  "[--nc-permitted name] [--nc-excluded name]",
 461                  "[--policy-map issuer-oid:subject-oid]",
 462                  "[--policy-explicit len] [--policy-inhibit len] [--policy-any len]",
 463                  "[--cert-policy oid [--cps-uri uri] [--user-notice text]]+",
 464                  "[--digest md5|sha1|sha224|sha256|sha384|sha512|sha3_224|sha3_256|sha3_384|sha3_512]",
 465                  "[--rsa-padding pkcs1|pss]",
 466                  "[--outform der|pem]"},
 467                 {
 468                         {"help",                        'h', 0, "show usage information"},
 469                         {"in",                          'i', 1, "private key input file, default: stdin"},
 470                         {"keyid",                       'x', 1, "smartcard or TPM private key object handle"},
 471                         {"type",                        't', 1, "type of input key, default: priv"},
 472                         {"dn",                          'd', 1, "subject and issuer distinguished name"},
 473                         {"san",                         'a', 1, "subjectAltName to include in certificate"},
 474                         {"lifetime",            'l', 1, "days the certificate is valid, default: 1095"},
 475                         {"not-before",          'F', 1, "date/time the validity of the cert starts"},
 476                         {"not-after",           'T', 1, "date/time the validity of the cert ends"},
 477                         {"dateform",            'D', 1, "strptime(3) input format, default: %d.%m.%y %T"},
 478                         {"serial",                      's', 1, "serial number in hex, default: random"},
 479                         {"ca",                          'b', 0, "include CA basicConstraint, default: no"},
 480                         {"pathlen",                     'p', 1, "set path length constraint"},
 481                         {"addrblock",           'B', 1, "RFC 3779 addrBlock to include"},
 482                         {"nc-permitted",        'n', 1, "add permitted NameConstraint"},
 483                         {"nc-excluded",         'N', 1, "add excluded NameConstraint"},
 484                         {"cert-policy",         'P', 1, "certificatePolicy OID to include"},
 485                         {"cps-uri",                     'C', 1, "Certification Practice statement URI for certificatePolicy"},
 486                         {"user-notice",         'U', 1, "user notice for certificatePolicy"},
 487                         {"policy-mapping",      'M', 1, "policyMapping from issuer to subject OID"},
 488                         {"policy-explicit",     'E', 1, "requireExplicitPolicy constraint"},
 489                         {"policy-inhibit",      'H', 1, "inhibitPolicyMapping constraint"},
 490                         {"policy-any",          'A', 1, "inhibitAnyPolicy constraint"},
 491                         {"flag",                        'e', 1, "include extendedKeyUsage flag"},
 492                         {"ocsp",                        'o', 1, "OCSP AuthorityInfoAccess URI to include"},
 493                         {"digest",                      'g', 1, "digest for signature creation, default: key-specific"},
 494                         {"rsa-padding",         'R', 1, "padding for RSA signatures, default: pkcs1"},
 495                         {"outform",                     'f', 1, "encoding of generated cert, default: der"},
 496                 }
 497         });
 498 }