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 = lib->settings->get_bool(lib->settings, "%s.rsa_pss", FALSE,
  75                                                                            lib->ns);
  76
  77         san = linked_list_create();
  78         ocsp = linked_list_create();
  79         permitted = linked_list_create();
  80         excluded = linked_list_create();
  81         policies = linked_list_create();
  82         mappings = linked_list_create();
  83         addrblocks = linked_list_create();
  84
  85         while (TRUE)
  86         {
  87                 switch (command_getopt(&arg))
  88                 {
  89                         case 'h':
  90                                 goto usage;
  91                         case 't':
  92                                 if (streq(arg, "rsa"))
  93                                 {
  94                                         type = KEY_RSA;
  95                                 }
  96                                 else if (streq(arg, "ecdsa"))
  97                                 {
  98                                         type = KEY_ECDSA;
  99                                 }
 100                                 else if (streq(arg, "ed25519"))
 101                                 {
 102                                         type = KEY_ED25519;
 103                                 }
 104                                 else if (streq(arg, "bliss"))
 105                                 {
 106                                         type = KEY_BLISS;
 107                                 }
 108                                 else if (streq(arg, "priv"))
 109                                 {
 110                                         type = KEY_ANY;
 111                                 }
 112                                 else
 113                                 {
 114                                         error = "invalid input type";
 115                                         goto usage;
 116                                 }
 117                                 continue;
 118                         case 'g':
 119                                 if (!enum_from_name(hash_algorithm_short_names, arg, &digest))
 120                                 {
 121                                         error = "invalid --digest type";
 122                                         goto usage;
 123                                 }
 124                                 continue;
 125                         case 'R':
 126                                 if (streq(arg, "pss"))
 127                                 {
 128                                         pss = TRUE;
 129                                 }
 130                                 else if (!streq(arg, "pkcs1"))
 131                                 {
 132                                         error = "invalid RSA padding";
 133                                         goto usage;
 134                                 }
 135                                 continue;
 136                         case 'i':
 137                                 file = arg;
 138                                 continue;
 139                         case 'x':
 140                                 keyid = arg;
 141                                 continue;
 142                         case 'd':
 143                                 dn = arg;
 144                                 continue;
 145                         case 'a':
 146                                 san->insert_last(san, identification_create_from_string(arg));
 147                                 continue;
 148                         case 'l':
 149                                 lifetime = atoi(arg) * 24 * 60 * 60;
 150                                 if (!lifetime)
 151                                 {
 152                                         error = "invalid --lifetime value";
 153                                         goto usage;
 154                                 }
 155                                 continue;
 156                         case 'D':
 157                                 dateform = arg;
 158                                 continue;
 159                         case 'F':
 160                                 datenb = arg;
 161                                 continue;
 162                         case 'T':
 163                                 datena = arg;
 164                                 continue;
 165                         case 's':
 166                                 hex = arg;
 167                                 continue;
 168                         case 'b':
 169                                 flags |= X509_CA;
 170                                 continue;
 171                         case 'p':
 172                                 pathlen = atoi(arg);
 173                                 continue;
 174                         case 'B':
 175                                 ts = parse_ts(arg);
 176                                 if (!ts)
 177                                 {
 178                                         error = "invalid addressBlock";
 179                                         goto usage;
 180                                 }
 181                                 addrblocks->insert_last(addrblocks, ts);
 182                                 continue;
 183                         case 'n':
 184                                 permitted->insert_last(permitted,
 185                                                                            identification_create_from_string(arg));
 186                                 continue;
 187                         case 'N':
 188                                 excluded->insert_last(excluded,
 189                                                                           identification_create_from_string(arg));
 190                                 continue;
 191                         case 'P':
 192                         {
 193                                 chunk_t oid;
 194
 195                                 oid = asn1_oid_from_string(arg);
 196                                 if (!oid.len)
 197                                 {
 198                                         error = "--cert-policy OID invalid";
 199                                         goto usage;
 200                                 }
 201                                 INIT(policy,
 202                                         .oid = oid,
 203                                 );
 204                                 policies->insert_last(policies, policy);
 205                                 continue;
 206                         }
 207                         case 'C':
 208                                 if (!policy)
 209                                 {
 210                                         error = "--cps-uri must follow a --cert-policy";
 211                                         goto usage;
 212                                 }
 213                                 policy->cps_uri = arg;
 214                                 continue;
 215                         case 'U':
 216                                 if (!policy)
 217                                 {
 218                                         error = "--user-notice must follow a --cert-policy";
 219                                         goto usage;
 220                                 }
 221                                 policy->unotice_text = arg;
 222                                 continue;
 223                         case 'M':
 224                         {
 225                                 char *pos = strchr(arg, ':');
 226                                 x509_policy_mapping_t *mapping;
 227                                 chunk_t subject_oid, issuer_oid;
 228
 229                                 if (pos)
 230                                 {
 231                                         *pos++ = '\0';
 232                                         issuer_oid = asn1_oid_from_string(arg);
 233                                         subject_oid = asn1_oid_from_string(pos);
 234                                 }
 235                                 if (!pos || !issuer_oid.len || !subject_oid.len)
 236                                 {
 237                                         error = "--policy-map OIDs invalid";
 238                                         goto usage;
 239                                 }
 240                                 INIT(mapping,
 241                                         .issuer = issuer_oid,
 242                                         .subject = subject_oid,
 243                                 );
 244                                 mappings->insert_last(mappings, mapping);
 245                                 continue;
 246                         }
 247                         case 'E':
 248                                 require_explicit = atoi(arg);
 249                                 continue;
 250                         case 'H':
 251                                 inhibit_mapping = atoi(arg);
 252                                 continue;
 253                         case 'A':
 254                                 inhibit_any = atoi(arg);
 255                                 continue;
 256                         case 'e':
 257                                 if (streq(arg, "serverAuth"))
 258                                 {
 259                                         flags |= X509_SERVER_AUTH;
 260                                 }
 261                                 else if (streq(arg, "clientAuth"))
 262                                 {
 263                                         flags |= X509_CLIENT_AUTH;
 264                                 }
 265                                 else if (streq(arg, "ikeIntermediate"))
 266                                 {
 267                                         flags |= X509_IKE_INTERMEDIATE;
 268                                 }
 269                                 else if (streq(arg, "crlSign"))
 270                                 {
 271                                         flags |= X509_CRL_SIGN;
 272                                 }
 273                                 else if (streq(arg, "ocspSigning"))
 274                                 {
 275                                         flags |= X509_OCSP_SIGNER;
 276                                 }
 277                                 else if (streq(arg, "msSmartcardLogon"))
 278                                 {
 279                                         flags |= X509_MS_SMARTCARD_LOGON;
 280                                 }
 281                                 continue;
 282                         case 'f':
 283                                 if (!get_form(arg, &form, CRED_CERTIFICATE))
 284                                 {
 285                                         error = "invalid output format";
 286                                         goto usage;
 287                                 }
 288                                 continue;
 289                         case 'o':
 290                                 ocsp->insert_last(ocsp, arg);
 291                                 continue;
 292                         case EOF:
 293                                 break;
 294                         default:
 295                                 error = "invalid --self option";
 296                                 goto usage;
 297                 }
 298                 break;
 299         }
 300
 301         if (!dn)
 302         {
 303                 error = "--dn is required";
 304                 goto usage;
 305         }
 306         if (!calculate_lifetime(dateform, datenb, datena, lifetime,
 307                                                         &not_before, &not_after))
 308         {
 309                 error = "invalid --not-before/after datetime";
 310                 goto usage;
 311         }
 312         id = identification_create_from_string(dn);
 313         if (id->get_type(id) != ID_DER_ASN1_DN)
 314         {
 315                 error = "supplied --dn is not a distinguished name";
 316                 goto end;
 317         }
 318         if (file)
 319         {
 320                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
 321                                                                          BUILD_FROM_FILE, file, BUILD_END);
 322         }
 323         else if (keyid)
 324         {
 325                 chunk_t chunk;
 326
 327                 chunk = chunk_from_hex(chunk_create(keyid, strlen(keyid)), NULL);
 328                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_ANY,
 329                                                                          BUILD_PKCS11_KEYID, chunk, BUILD_END);
 330                 free(chunk.ptr);
 331         }
 332         else
 333         {
 334                 chunk_t chunk;
 335
 336                 set_file_mode(stdin, CERT_ASN1_DER);
 337                 if (!chunk_from_fd(0, &chunk))
 338                 {
 339                         fprintf(stderr, "%s: ", strerror(errno));
 340                         error = "reading private key failed";
 341                         goto end;
 342                 }
 343                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
 344                                                                          BUILD_BLOB, chunk, BUILD_END);
 345                 free(chunk.ptr);
 346         }
 347         if (!private)
 348         {
 349                 error = "loading private key failed";
 350                 goto end;
 351         }
 352         public = private->get_public_key(private);
 353         if (!public)
 354         {
 355                 error = "extracting public key failed";
 356                 goto end;
 357         }
 358         if (hex)
 359         {
 360                 serial = chunk_from_hex(chunk_create(hex, strlen(hex)), NULL);
 361         }
 362         else
 363         {
 364                 rng_t *rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
 365
 366                 if (!rng)
 367                 {
 368                         error = "no random number generator found";
 369                         goto end;
 370                 }
 371                 if (!rng_allocate_bytes_not_zero(rng, 8, &serial, FALSE))
 372                 {
 373                         error = "failed to generate serial number";
 374                         rng->destroy(rng);
 375                         goto end;
 376                 }
 377                 serial.ptr[0] &= 0x7F;
 378                 rng->destroy(rng);
 379         }
 380         scheme = get_signature_scheme(private, digest, pss);
 381         if (!scheme)
 382         {
 383                 error = "no signature scheme found";
 384                 goto end;
 385         }
 386
 387         cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
 388                                                 BUILD_SIGNING_KEY, private, BUILD_PUBLIC_KEY, public,
 389                                                 BUILD_SUBJECT, id, BUILD_NOT_BEFORE_TIME, not_before,
 390                                                 BUILD_NOT_AFTER_TIME, not_after, BUILD_SERIAL, serial,
 391                                                 BUILD_SIGNATURE_SCHEME, scheme, BUILD_X509_FLAG, flags,
 392                                                 BUILD_PATHLEN, pathlen, BUILD_SUBJECT_ALTNAMES, san,
 393                                                 BUILD_ADDRBLOCKS, addrblocks,
 394                                                 BUILD_OCSP_ACCESS_LOCATIONS, ocsp,
 395                                                 BUILD_PERMITTED_NAME_CONSTRAINTS, permitted,
 396                                                 BUILD_EXCLUDED_NAME_CONSTRAINTS, excluded,
 397                                                 BUILD_CERTIFICATE_POLICIES, policies,
 398                                                 BUILD_POLICY_MAPPINGS, mappings,
 399                                                 BUILD_POLICY_REQUIRE_EXPLICIT, require_explicit,
 400                                                 BUILD_POLICY_INHIBIT_MAPPING, inhibit_mapping,
 401                                                 BUILD_POLICY_INHIBIT_ANY, inhibit_any,
 402                                                 BUILD_END);
 403         if (!cert)
 404         {
 405                 error = "generating certificate failed";
 406                 goto end;
 407         }
 408         if (!cert->get_encoding(cert, form, &encoding))
 409         {
 410                 error = "encoding certificate failed";
 411                 goto end;
 412         }
 413         set_file_mode(stdout, form);
 414         if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
 415         {
 416                 error = "writing certificate key failed";
 417                 goto end;
 418         }
 419
 420 end:
 421         DESTROY_IF(id);
 422         DESTROY_IF(cert);
 423         DESTROY_IF(public);
 424         DESTROY_IF(private);
 425         san->destroy_offset(san, offsetof(identification_t, destroy));
 426         permitted->destroy_offset(permitted, offsetof(identification_t, destroy));
 427         excluded->destroy_offset(excluded, offsetof(identification_t, destroy));
 428         addrblocks->destroy_offset(addrblocks, offsetof(traffic_selector_t, destroy));
 429         policies->destroy_function(policies, (void*)destroy_cert_policy);
 430         mappings->destroy_function(mappings, (void*)destroy_policy_mapping);
 431         ocsp->destroy(ocsp);
 432         signature_params_destroy(scheme);
 433         free(encoding.ptr);
 434         free(serial.ptr);
 435
 436         if (error)
 437         {
 438                 fprintf(stderr, "%s\n", error);
 439                 return 1;
 440         }
 441         return 0;
 442
 443 usage:
 444         san->destroy_offset(san, offsetof(identification_t, destroy));
 445         permitted->destroy_offset(permitted, offsetof(identification_t, destroy));
 446         excluded->destroy_offset(excluded, offsetof(identification_t, destroy));
 447         addrblocks->destroy_offset(addrblocks, offsetof(traffic_selector_t, destroy));
 448         policies->destroy_function(policies, (void*)destroy_cert_policy);
 449         mappings->destroy_function(mappings, (void*)destroy_policy_mapping);
 450         ocsp->destroy(ocsp);
 451         return command_usage(error);
 452 }
 453
 454 /**
 455  * Register the command.
 456  */
 457 static void __attribute__ ((constructor))reg()
 458 {
 459         command_register((command_t) {
 460                 self, 's', "self",
 461                 "create a self signed certificate",
 462                 {"[--in file|--keyid hex] [--type rsa|ecdsa|ed25519|bliss|priv]",
 463                  " --dn distinguished-name [--san subjectAltName]+",
 464                  "[--lifetime days] [--serial hex] [--ca] [--ocsp uri]+",
 465                  "[--flag serverAuth|clientAuth|crlSign|ocspSigning|msSmartcardLogon]+",
 466                  "[--nc-permitted name] [--nc-excluded name]",
 467                  "[--policy-map issuer-oid:subject-oid]",
 468                  "[--policy-explicit len] [--policy-inhibit len] [--policy-any len]",
 469                  "[--cert-policy oid [--cps-uri uri] [--user-notice text]]+",
 470                  "[--digest md5|sha1|sha224|sha256|sha384|sha512|sha3_224|sha3_256|sha3_384|sha3_512]",
 471                  "[--rsa-padding pkcs1|pss]",
 472                  "[--outform der|pem]"},
 473                 {
 474                         {"help",                        'h', 0, "show usage information"},
 475                         {"in",                          'i', 1, "private key input file, default: stdin"},
 476                         {"keyid",                       'x', 1, "smartcard or TPM private key object handle"},
 477                         {"type",                        't', 1, "type of input key, default: priv"},
 478                         {"dn",                          'd', 1, "subject and issuer distinguished name"},
 479                         {"san",                         'a', 1, "subjectAltName to include in certificate"},
 480                         {"lifetime",            'l', 1, "days the certificate is valid, default: 1095"},
 481                         {"not-before",          'F', 1, "date/time the validity of the cert starts"},
 482                         {"not-after",           'T', 1, "date/time the validity of the cert ends"},
 483                         {"dateform",            'D', 1, "strptime(3) input format, default: %d.%m.%y %T"},
 484                         {"serial",                      's', 1, "serial number in hex, default: random"},
 485                         {"ca",                          'b', 0, "include CA basicConstraint, default: no"},
 486                         {"pathlen",                     'p', 1, "set path length constraint"},
 487                         {"addrblock",           'B', 1, "RFC 3779 addrBlock to include"},
 488                         {"nc-permitted",        'n', 1, "add permitted NameConstraint"},
 489                         {"nc-excluded",         'N', 1, "add excluded NameConstraint"},
 490                         {"cert-policy",         'P', 1, "certificatePolicy OID to include"},
 491                         {"cps-uri",                     'C', 1, "Certification Practice statement URI for certificatePolicy"},
 492                         {"user-notice",         'U', 1, "user notice for certificatePolicy"},
 493                         {"policy-mapping",      'M', 1, "policyMapping from issuer to subject OID"},
 494                         {"policy-explicit",     'E', 1, "requireExplicitPolicy constraint"},
 495                         {"policy-inhibit",      'H', 1, "inhibitPolicyMapping constraint"},
 496                         {"policy-any",          'A', 1, "inhibitAnyPolicy constraint"},
 497                         {"flag",                        'e', 1, "include extendedKeyUsage flag"},
 498                         {"ocsp",                        'o', 1, "OCSP AuthorityInfoAccess URI to include"},
 499                         {"digest",                      'g', 1, "digest for signature creation, default: key-specific"},
 500                         {"rsa-padding",         'R', 1, "padding for RSA signatures, default: pkcs1"},
 501                         {"outform",                     'f', 1, "encoding of generated cert, default: der"},
 502                 }
 503         });
 504 }