apps/x509.c

   1 /*
   2  * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include "apps.h"
  14 #include "progs.h"
  15 #include <openssl/bio.h>
  16 #include <openssl/asn1.h>
  17 #include <openssl/err.h>
  18 #include <openssl/bn.h>
  19 #include <openssl/evp.h>
  20 #include <openssl/x509.h>
  21 #include <openssl/x509v3.h>
  22 #include <openssl/objects.h>
  23 #include <openssl/pem.h>
  24 #include <openssl/rsa.h>
  25 #ifndef OPENSSL_NO_DSA
  26 # include <openssl/dsa.h>
  27 #endif
  28
  29 #undef POSTFIX
  30 #define POSTFIX ".srl"
  31 #define DEFAULT_DAYS    30 /* default cert validity period in days */
  32 #define UNSET_DAYS      -2 /* -1 is used for testing expiration checks */
  33 #define EXT_COPY_UNSET     -1
  34
  35 static int callb(int ok, X509_STORE_CTX *ctx);
  36 static ASN1_INTEGER *x509_load_serial(const char *CAfile,
  37                                       const char *serialfile, int create);
  38 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt);
  39 static int print_x509v3_exts(BIO *bio, X509 *x, const char *ext_names);
  40
  41 typedef enum OPTION_choice {
  42     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  43     OPT_INFORM, OPT_OUTFORM, OPT_KEYFORM, OPT_REQ, OPT_CAFORM,
  44     OPT_CAKEYFORM, OPT_VFYOPT, OPT_SIGOPT, OPT_DAYS, OPT_PASSIN, OPT_EXTFILE,
  45     OPT_EXTENSIONS, OPT_IN, OPT_OUT, OPT_KEY, OPT_SIGNKEY, OPT_CA, OPT_CAKEY,
  46     OPT_CASERIAL, OPT_SET_SERIAL, OPT_NEW, OPT_FORCE_PUBKEY, OPT_SUBJ,
  47     OPT_ADDTRUST, OPT_ADDREJECT, OPT_SETALIAS, OPT_CERTOPT, OPT_NAMEOPT,
  48     OPT_EMAIL, OPT_OCSP_URI, OPT_SERIAL, OPT_NEXT_SERIAL,
  49     OPT_MODULUS, OPT_PUBKEY, OPT_X509TOREQ, OPT_TEXT, OPT_HASH,
  50     OPT_ISSUER_HASH, OPT_SUBJECT, OPT_ISSUER, OPT_FINGERPRINT, OPT_DATES,
  51     OPT_PURPOSE, OPT_STARTDATE, OPT_ENDDATE, OPT_CHECKEND, OPT_CHECKHOST,
  52     OPT_CHECKEMAIL, OPT_CHECKIP, OPT_NOOUT, OPT_TRUSTOUT, OPT_CLRTRUST,
  53     OPT_CLRREJECT, OPT_ALIAS, OPT_CACREATESERIAL, OPT_CLREXT, OPT_OCSPID,
  54     OPT_SUBJECT_HASH_OLD, OPT_ISSUER_HASH_OLD, OPT_COPY_EXTENSIONS,
  55     OPT_BADSIG, OPT_MD, OPT_ENGINE, OPT_NOCERT, OPT_PRESERVE_DATES,
  56     OPT_R_ENUM, OPT_PROV_ENUM, OPT_EXT
  57 } OPTION_CHOICE;
  58
  59 const OPTIONS x509_options[] = {
  60     OPT_SECTION("General"),
  61     {"help", OPT_HELP, '-', "Display this summary"},
  62
  63     {"in", OPT_IN, '<',
  64      "Certificate input (default stdin), or CSR input file with -req"},
  65     {"passin", OPT_PASSIN, 's', "Private key and cert file pass-phrase source"},
  66     {"new", OPT_NEW, '-', "Generate a certificate from scratch"},
  67     {"x509toreq", OPT_X509TOREQ, '-',
  68      "Output a certification request (rather than a certificate)"},
  69     {"req", OPT_REQ, '-', "Input is a CSR file (rather than a certificate)"},
  70     {"copy_extensions", OPT_COPY_EXTENSIONS, 's',
  71      "copy extensions when converting from CSR to x509 or vice versa"},
  72     {"inform", OPT_INFORM, 'f',
  73      "CSR input file format (DER or PEM) - default PEM"},
  74     {"vfyopt", OPT_VFYOPT, 's', "CSR verification parameter in n:v form"},
  75     {"key", OPT_KEY, 's',
  76      "Key to be used in certificate or cert request"},
  77     {"signkey", OPT_SIGNKEY, 's',
  78      "Same as -key"},
  79     {"keyform", OPT_KEYFORM, 'E',
  80      "Key input format (ENGINE, other values ignored)"},
  81     {"out", OPT_OUT, '>', "Output file - default stdout"},
  82     {"outform", OPT_OUTFORM, 'f',
  83      "Output format (DER or PEM) - default PEM"},
  84     {"nocert", OPT_NOCERT, '-',
  85      "No cert output (except for requested printing)"},
  86     {"noout", OPT_NOOUT, '-', "No output (except for requested printing)"},
  87
  88     OPT_SECTION("Certificate printing"),
  89     {"text", OPT_TEXT, '-', "Print the certificate in text form"},
  90     {"certopt", OPT_CERTOPT, 's', "Various certificate text printing options"},
  91     {"fingerprint", OPT_FINGERPRINT, '-', "Print the certificate fingerprint"},
  92     {"alias", OPT_ALIAS, '-', "Print certificate alias"},
  93     {"serial", OPT_SERIAL, '-', "Print serial number value"},
  94     {"startdate", OPT_STARTDATE, '-', "Print the notBefore field"},
  95     {"enddate", OPT_ENDDATE, '-', "Print the notAfter field"},
  96     {"dates", OPT_DATES, '-', "Print both notBefore and notAfter fields"},
  97     {"subject", OPT_SUBJECT, '-', "Print subject DN"},
  98     {"issuer", OPT_ISSUER, '-', "Print issuer DN"},
  99     {"nameopt", OPT_NAMEOPT, 's',
 100      "Certificate subject/issuer name printing options"},
 101     {"email", OPT_EMAIL, '-', "Print email address(es)"},
 102     {"hash", OPT_HASH, '-', "Synonym for -subject_hash (for backward compat)"},
 103     {"subject_hash", OPT_HASH, '-', "Print subject hash value"},
 104 #ifndef OPENSSL_NO_MD5
 105     {"subject_hash_old", OPT_SUBJECT_HASH_OLD, '-',
 106      "Print old-style (MD5) subject hash value"},
 107 #endif
 108     {"issuer_hash", OPT_ISSUER_HASH, '-', "Print issuer hash value"},
 109 #ifndef OPENSSL_NO_MD5
 110     {"issuer_hash_old", OPT_ISSUER_HASH_OLD, '-',
 111      "Print old-style (MD5) issuer hash value"},
 112 #endif
 113     {"ext", OPT_EXT, 's',
 114      "Restrict which X.509 extensions to print and/or copy"},
 115     {"ocspid", OPT_OCSPID, '-',
 116      "Print OCSP hash values for the subject name and public key"},
 117     {"ocsp_uri", OPT_OCSP_URI, '-', "Print OCSP Responder URL(s)"},
 118     {"purpose", OPT_PURPOSE, '-', "Print out certificate purposes"},
 119     {"pubkey", OPT_PUBKEY, '-', "Print the public key in PEM format"},
 120     {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
 121
 122     OPT_SECTION("Certificate checking"),
 123     {"checkend", OPT_CHECKEND, 'M',
 124      "Check whether cert expires in the next arg seconds"},
 125     {OPT_MORE_STR, 1, 1, "Exit 1 (failure) if so, 0 if not"},
 126     {"checkhost", OPT_CHECKHOST, 's', "Check certificate matches host"},
 127     {"checkemail", OPT_CHECKEMAIL, 's', "Check certificate matches email"},
 128     {"checkip", OPT_CHECKIP, 's', "Check certificate matches ipaddr"},
 129
 130     OPT_SECTION("Certificate output"),
 131     {"set_serial", OPT_SET_SERIAL, 's',
 132      "Serial number to use, overrides -CAserial"},
 133     {"next_serial", OPT_NEXT_SERIAL, '-',
 134      "Increment current certificate serial number"},
 135     {"days", OPT_DAYS, 'n',
 136      "Number of days until newly generated certificate expires - default 30"},
 137     {"preserve_dates", OPT_PRESERVE_DATES, '-',
 138      "Preserve existing validity dates"},
 139     {"subj", OPT_SUBJ, 's', "Set or override certificate subject (and issuer)"},
 140     {"force_pubkey", OPT_FORCE_PUBKEY, '<',
 141      "Place the given key in new certificate"},
 142     {"clrext", OPT_CLREXT, '-',
 143      "Do not take over any extensions from the source certificate or request"},
 144     {"extfile", OPT_EXTFILE, '<', "Config file with X509V3 extensions to add"},
 145     {"extensions", OPT_EXTENSIONS, 's',
 146      "Section of extfile to use - default: unnamed section"},
 147     {"sigopt", OPT_SIGOPT, 's', "Signature parameter, in n:v form"},
 148     {"badsig", OPT_BADSIG, '-',
 149      "Corrupt last byte of certificate signature (for test)"},
 150     {"", OPT_MD, '-', "Any supported digest, used for signing and printing"},
 151
 152     OPT_SECTION("Micro-CA"),
 153     {"CA", OPT_CA, '<',
 154      "Use the given CA certificate, conflicts with -key"},
 155     {"CAform", OPT_CAFORM, 'F', "CA cert format (PEM/DER/P12); has no effect"},
 156     {"CAkey", OPT_CAKEY, 's', "The corresponding CA key; default is -CA arg"},
 157     {"CAkeyform", OPT_CAKEYFORM, 'E',
 158      "CA key format (ENGINE, other values ignored)"},
 159     {"CAserial", OPT_CASERIAL, 's',
 160      "File that keeps track of CA-generated serial number"},
 161     {"CAcreateserial", OPT_CACREATESERIAL, '-',
 162      "Create CA serial number file if it does not exist"},
 163
 164     OPT_SECTION("Certificate trust output"),
 165     {"trustout", OPT_TRUSTOUT, '-', "Mark certificate PEM output as trusted"},
 166     {"setalias", OPT_SETALIAS, 's', "Set certificate alias (nickname)"},
 167     {"clrtrust", OPT_CLRTRUST, '-', "Clear all trusted purposes"},
 168     {"addtrust", OPT_ADDTRUST, 's', "Trust certificate for a given purpose"},
 169     {"clrreject", OPT_CLRREJECT, '-',
 170      "Clears all the prohibited or rejected uses of the certificate"},
 171     {"addreject", OPT_ADDREJECT, 's',
 172      "Reject certificate for a given purpose"},
 173
 174     OPT_R_OPTIONS,
 175 #ifndef OPENSSL_NO_ENGINE
 176     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 177 #endif
 178     OPT_PROV_OPTIONS,
 179     {NULL}
 180 };
 181
 182 static void warn_copying(ASN1_OBJECT *excluded, const char *names)
 183 {
 184     const char *sn = OBJ_nid2sn(OBJ_obj2nid(excluded));
 185
 186     if (names != NULL && strstr(names, sn) != NULL)
 187         BIO_printf(bio_err,
 188                    "Warning: -ext should not specify copying %s extension to CSR; ignoring this\n",
 189                    sn);
 190 }
 191
 192 static X509_REQ *x509_to_req(X509 *cert, EVP_PKEY *pkey, const EVP_MD *digest,
 193                              STACK_OF(OPENSSL_STRING) *sigopts,
 194                              int ext_copy, const char *names)
 195 {
 196     const STACK_OF(X509_EXTENSION) *cert_exts = X509_get0_extensions(cert);
 197     int i, n = sk_X509_EXTENSION_num(cert_exts /* may be NULL */);
 198     ASN1_OBJECT *skid = OBJ_nid2obj(NID_subject_key_identifier);
 199     ASN1_OBJECT *akid = OBJ_nid2obj(NID_authority_key_identifier);
 200     STACK_OF(X509_EXTENSION) *exts;
 201     X509_REQ *req = X509_to_X509_REQ(cert, NULL, NULL);
 202
 203     if (req == NULL)
 204         return NULL;
 205
 206     /*
 207      * Filter out SKID and AKID extensions, which make no sense in a CSR.
 208      * If names is not NULL, copy only those extensions listed there.
 209      */
 210     warn_copying(skid, names);
 211     warn_copying(akid, names);
 212     if ((exts = sk_X509_EXTENSION_new_reserve(NULL, n)) == NULL)
 213         goto err;
 214     for (i = 0; i < n; i++) {
 215         X509_EXTENSION *ex = sk_X509_EXTENSION_value(cert_exts, i);
 216         ASN1_OBJECT *obj = X509_EXTENSION_get_object(ex);
 217
 218         if (OBJ_cmp(obj, skid) != 0 && OBJ_cmp(obj, akid) != 0
 219                 && !sk_X509_EXTENSION_push(exts, ex))
 220             goto err;
 221     }
 222
 223     if (sk_X509_EXTENSION_num(exts) > 0) {
 224         if (ext_copy != EXT_COPY_UNSET && ext_copy != EXT_COPY_NONE
 225                 && !X509_REQ_add_extensions(req, exts)) {
 226             BIO_printf(bio_err, "Error copying extensions from certificate\n");
 227             goto err;
 228         }
 229     }
 230     if (!do_X509_REQ_sign(req, pkey, digest, sigopts))
 231         goto err;
 232     sk_X509_EXTENSION_free(exts);
 233     return req;
 234
 235  err:
 236     sk_X509_EXTENSION_free(exts);
 237     X509_REQ_free(req);
 238     return NULL;
 239 }
 240
 241 int x509_main(int argc, char **argv)
 242 {
 243     ASN1_INTEGER *sno = NULL;
 244     ASN1_OBJECT *objtmp = NULL;
 245     BIO *out = NULL;
 246     CONF *extconf = NULL;
 247     int ext_copy = EXT_COPY_UNSET;
 248     X509V3_CTX ext_ctx;
 249     EVP_PKEY *privkey = NULL, *CAkey = NULL, *pubkey = NULL;
 250     EVP_PKEY *pkey;
 251     int newcert = 0;
 252     char *subj = NULL, *digestname = NULL;
 253     X509_NAME *fsubj = NULL;
 254     const unsigned long chtype = MBSTRING_ASC;
 255     const int multirdn = 1;
 256     STACK_OF(ASN1_OBJECT) *trust = NULL, *reject = NULL;
 257     STACK_OF(OPENSSL_STRING) *sigopts = NULL, *vfyopts = NULL;
 258     X509 *x = NULL, *xca = NULL, *issuer_cert;
 259     X509_REQ *req = NULL, *rq = NULL;
 260     X509_STORE *ctx = NULL;
 261     const EVP_MD *digest = NULL;
 262     char *CAkeyfile = NULL, *CAserial = NULL, *pubkeyfile = NULL, *alias = NULL;
 263     char *checkhost = NULL, *checkemail = NULL, *checkip = NULL;
 264     char *ext_names = NULL;
 265     char *extsect = NULL, *extfile = NULL, *passin = NULL, *passinarg = NULL;
 266     char *infile = NULL, *outfile = NULL, *privkeyfile = NULL, *CAfile = NULL;
 267     char *prog;
 268     int days = UNSET_DAYS; /* not explicitly set */
 269     int x509toreq = 0, modulus = 0, print_pubkey = 0, pprint = 0;
 270     int CAformat = FORMAT_PEM, CAkeyformat = FORMAT_PEM;
 271     int fingerprint = 0, reqfile = 0, checkend = 0;
 272     int informat = FORMAT_PEM, outformat = FORMAT_PEM, keyformat = FORMAT_PEM;
 273     int next_serial = 0, subject_hash = 0, issuer_hash = 0, ocspid = 0;
 274     int noout = 0, CA_createserial = 0, email = 0;
 275     int ocsp_uri = 0, trustout = 0, clrtrust = 0, clrreject = 0, aliasout = 0;
 276     int ret = 1, i, j, num = 0, badsig = 0, clrext = 0, nocert = 0;
 277     int text = 0, serial = 0, subject = 0, issuer = 0, startdate = 0, ext = 0;
 278     int enddate = 0;
 279     time_t checkoffset = 0;
 280     unsigned long certflag = 0;
 281     int preserve_dates = 0;
 282     OPTION_CHOICE o;
 283     ENGINE *e = NULL;
 284 #ifndef OPENSSL_NO_MD5
 285     int subject_hash_old = 0, issuer_hash_old = 0;
 286 #endif
 287
 288     ctx = X509_STORE_new();
 289     if (ctx == NULL)
 290         goto end;
 291     X509_STORE_set_verify_cb(ctx, callb);
 292
 293     prog = opt_init(argc, argv, x509_options);
 294     while ((o = opt_next()) != OPT_EOF) {
 295         switch (o) {
 296         case OPT_EOF:
 297         case OPT_ERR:
 298  opthelp:
 299             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 300             goto end;
 301         case OPT_HELP:
 302             opt_help(x509_options);
 303             ret = 0;
 304             goto end;
 305         case OPT_INFORM:
 306             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
 307                 goto opthelp;
 308             break;
 309         case OPT_IN:
 310             infile = opt_arg();
 311             break;
 312         case OPT_OUTFORM:
 313             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 314                 goto opthelp;
 315             break;
 316         case OPT_KEYFORM:
 317             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
 318                 goto opthelp;
 319             break;
 320         case OPT_CAFORM:
 321             if (!opt_format(opt_arg(), OPT_FMT_ANY, &CAformat))
 322                 goto opthelp;
 323             break;
 324         case OPT_CAKEYFORM:
 325             if (!opt_format(opt_arg(), OPT_FMT_ANY, &CAkeyformat))
 326                 goto opthelp;
 327             break;
 328         case OPT_OUT:
 329             outfile = opt_arg();
 330             break;
 331         case OPT_REQ:
 332             reqfile = 1;
 333             break;
 334         case OPT_COPY_EXTENSIONS:
 335             if (!set_ext_copy(&ext_copy, opt_arg())) {
 336                 BIO_printf(bio_err,
 337                            "Invalid extension copy option: %s\n", opt_arg());
 338                 goto end;
 339             }
 340             break;
 341
 342         case OPT_SIGOPT:
 343             if (!sigopts)
 344                 sigopts = sk_OPENSSL_STRING_new_null();
 345             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 346                 goto opthelp;
 347             break;
 348         case OPT_VFYOPT:
 349             if (!vfyopts)
 350                 vfyopts = sk_OPENSSL_STRING_new_null();
 351             if (!vfyopts || !sk_OPENSSL_STRING_push(vfyopts, opt_arg()))
 352                 goto opthelp;
 353             break;
 354         case OPT_DAYS:
 355             days = atoi(opt_arg());
 356             if (days < -1) {
 357                 BIO_printf(bio_err, "%s: -days parameter arg must be >= -1\n",
 358                            prog);
 359                 goto end;
 360             }
 361             break;
 362         case OPT_PASSIN:
 363             passinarg = opt_arg();
 364             break;
 365         case OPT_EXTFILE:
 366             extfile = opt_arg();
 367             break;
 368         case OPT_R_CASES:
 369             if (!opt_rand(o))
 370                 goto end;
 371             break;
 372         case OPT_PROV_CASES:
 373             if (!opt_provider(o))
 374                 goto end;
 375             break;
 376         case OPT_EXTENSIONS:
 377             extsect = opt_arg();
 378             break;
 379         case OPT_KEY:
 380         case OPT_SIGNKEY:
 381             privkeyfile = opt_arg();
 382             break;
 383         case OPT_CA:
 384             CAfile = opt_arg();
 385             break;
 386         case OPT_CAKEY:
 387             CAkeyfile = opt_arg();
 388             break;
 389         case OPT_CASERIAL:
 390             CAserial = opt_arg();
 391             break;
 392         case OPT_SET_SERIAL:
 393             if (sno != NULL) {
 394                 BIO_printf(bio_err, "Serial number supplied twice\n");
 395                 goto opthelp;
 396             }
 397             if ((sno = s2i_ASN1_INTEGER(NULL, opt_arg())) == NULL)
 398                 goto opthelp;
 399             break;
 400         case OPT_NEW:
 401             newcert = 1;
 402             break;
 403         case OPT_FORCE_PUBKEY:
 404             pubkeyfile = opt_arg();
 405             break;
 406         case OPT_SUBJ:
 407             subj = opt_arg();
 408             break;
 409         case OPT_ADDTRUST:
 410             if (trust == NULL && (trust = sk_ASN1_OBJECT_new_null()) == NULL)
 411                 goto end;
 412             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 413                 BIO_printf(bio_err, "%s: Invalid trust object value %s\n",
 414                            prog, opt_arg());
 415                 goto opthelp;
 416             }
 417             sk_ASN1_OBJECT_push(trust, objtmp);
 418             trustout = 1;
 419             break;
 420         case OPT_ADDREJECT:
 421             if (reject == NULL && (reject = sk_ASN1_OBJECT_new_null()) == NULL)
 422                 goto end;
 423             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 424                 BIO_printf(bio_err, "%s: Invalid reject object value %s\n",
 425                            prog, opt_arg());
 426                 goto opthelp;
 427             }
 428             sk_ASN1_OBJECT_push(reject, objtmp);
 429             trustout = 1;
 430             break;
 431         case OPT_SETALIAS:
 432             alias = opt_arg();
 433             trustout = 1;
 434             break;
 435         case OPT_CERTOPT:
 436             if (!set_cert_ex(&certflag, opt_arg()))
 437                 goto opthelp;
 438             break;
 439         case OPT_NAMEOPT:
 440             if (!set_nameopt(opt_arg()))
 441                 goto opthelp;
 442             break;
 443         case OPT_ENGINE:
 444             e = setup_engine(opt_arg(), 0);
 445             break;
 446         case OPT_EMAIL:
 447             email = ++num;
 448             break;
 449         case OPT_OCSP_URI:
 450             ocsp_uri = ++num;
 451             break;
 452         case OPT_SERIAL:
 453             serial = ++num;
 454             break;
 455         case OPT_NEXT_SERIAL:
 456             next_serial = ++num;
 457             break;
 458         case OPT_MODULUS:
 459             modulus = ++num;
 460             break;
 461         case OPT_PUBKEY:
 462             print_pubkey = ++num;
 463             break;
 464         case OPT_X509TOREQ:
 465             x509toreq = 1;
 466             break;
 467         case OPT_TEXT:
 468             text = ++num;
 469             break;
 470         case OPT_SUBJECT:
 471             subject = ++num;
 472             break;
 473         case OPT_ISSUER:
 474             issuer = ++num;
 475             break;
 476         case OPT_FINGERPRINT:
 477             fingerprint = ++num;
 478             break;
 479         case OPT_HASH:
 480             subject_hash = ++num;
 481             break;
 482         case OPT_ISSUER_HASH:
 483             issuer_hash = ++num;
 484             break;
 485         case OPT_PURPOSE:
 486             pprint = ++num;
 487             break;
 488         case OPT_STARTDATE:
 489             startdate = ++num;
 490             break;
 491         case OPT_ENDDATE:
 492             enddate = ++num;
 493             break;
 494         case OPT_NOOUT:
 495             noout = ++num;
 496             break;
 497         case OPT_EXT:
 498             ext = ++num;
 499             ext_names = opt_arg();
 500             break;
 501         case OPT_NOCERT:
 502             nocert = 1;
 503             break;
 504         case OPT_TRUSTOUT:
 505             trustout = 1;
 506             break;
 507         case OPT_CLRTRUST:
 508             clrtrust = ++num;
 509             break;
 510         case OPT_CLRREJECT:
 511             clrreject = ++num;
 512             break;
 513         case OPT_ALIAS:
 514             aliasout = ++num;
 515             break;
 516         case OPT_CACREATESERIAL:
 517             CA_createserial = ++num;
 518             break;
 519         case OPT_CLREXT:
 520             clrext = 1;
 521             break;
 522         case OPT_OCSPID:
 523             ocspid = ++num;
 524             break;
 525         case OPT_BADSIG:
 526             badsig = 1;
 527             break;
 528 #ifndef OPENSSL_NO_MD5
 529         case OPT_SUBJECT_HASH_OLD:
 530             subject_hash_old = ++num;
 531             break;
 532         case OPT_ISSUER_HASH_OLD:
 533             issuer_hash_old = ++num;
 534             break;
 535 #else
 536         case OPT_SUBJECT_HASH_OLD:
 537         case OPT_ISSUER_HASH_OLD:
 538             break;
 539 #endif
 540         case OPT_DATES:
 541             startdate = ++num;
 542             enddate = ++num;
 543             break;
 544         case OPT_CHECKEND:
 545             checkend = 1;
 546             {
 547                 intmax_t temp = 0;
 548                 if (!opt_imax(opt_arg(), &temp))
 549                     goto opthelp;
 550                 checkoffset = (time_t)temp;
 551                 if ((intmax_t)checkoffset != temp) {
 552                     BIO_printf(bio_err, "%s: Checkend time out of range %s\n",
 553                                prog, opt_arg());
 554                     goto opthelp;
 555                 }
 556             }
 557             break;
 558         case OPT_CHECKHOST:
 559             checkhost = opt_arg();
 560             break;
 561         case OPT_CHECKEMAIL:
 562             checkemail = opt_arg();
 563             break;
 564         case OPT_CHECKIP:
 565             checkip = opt_arg();
 566             break;
 567         case OPT_PRESERVE_DATES:
 568             preserve_dates = 1;
 569             break;
 570         case OPT_MD:
 571             digestname = opt_unknown();
 572             break;
 573         }
 574     }
 575
 576     /* No extra arguments. */
 577     argc = opt_num_rest();
 578     if (argc != 0)
 579         goto opthelp;
 580
 581     if (!app_RAND_load())
 582         goto end;
 583
 584     if (digestname != NULL) {
 585         if (!opt_md(digestname, &digest))
 586             goto opthelp;
 587     }
 588     if (preserve_dates && days != UNSET_DAYS) {
 589         BIO_printf(bio_err, "Cannot use -preserve_dates with -days option\n");
 590         goto end;
 591     }
 592     if (days == UNSET_DAYS)
 593         days = DEFAULT_DAYS;
 594
 595     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 596         BIO_printf(bio_err, "Error getting password\n");
 597         goto end;
 598     }
 599
 600     if (!X509_STORE_set_default_paths_ex(ctx, app_get0_libctx(),
 601                                          app_get0_propq()))
 602         goto end;
 603
 604     if (newcert && infile != NULL) {
 605         BIO_printf(bio_err, "The -in option cannot be used with -new\n");
 606         goto end;
 607     }
 608     if (newcert && reqfile) {
 609         BIO_printf(bio_err,
 610                    "The -req option cannot be used with -new\n");
 611         goto end;
 612     }
 613     if (privkeyfile != NULL) {
 614         privkey = load_key(privkeyfile, keyformat, 0, passin, e, "private key");
 615         if (privkey == NULL)
 616             goto end;
 617     }
 618     if (pubkeyfile != NULL) {
 619         if ((pubkey = load_pubkey(pubkeyfile, keyformat, 0, NULL, e,
 620                                   "explicitly set public key")) == NULL)
 621             goto end;
 622     }
 623
 624     if (newcert) {
 625         if (subj == NULL) {
 626             BIO_printf(bio_err,
 627                        "The -new option requires a subject to be set using -subj\n");
 628             goto end;
 629         }
 630         if (privkeyfile == NULL && pubkeyfile == NULL) {
 631             BIO_printf(bio_err,
 632                        "The -new option without -key requires using -force_pubkey\n");
 633             goto end;
 634         }
 635     }
 636     if (subj != NULL
 637             && (fsubj = parse_name(subj, chtype, multirdn, "subject")) == NULL)
 638         goto end;
 639
 640     if (CAkeyfile == NULL)
 641         CAkeyfile = CAfile;
 642     if (CAfile != NULL) {
 643         if (privkeyfile != NULL) {
 644             BIO_printf(bio_err, "Cannot use both -key and -CA option\n");
 645             goto end;
 646         }
 647     } else if (CAkeyfile != NULL) {
 648         BIO_printf(bio_err,
 649                    "Warning: ignoring -CAkey option since no -CA option is given\n");
 650     }
 651
 652     if (extfile == NULL) {
 653         if (extsect != NULL)
 654             BIO_printf(bio_err,
 655                        "Warning: ignoring -extensions option without -extfile\n");
 656     } else {
 657         X509V3_CTX ctx2;
 658
 659         if ((extconf = app_load_config(extfile)) == NULL)
 660             goto end;
 661         if (extsect == NULL) {
 662             extsect = NCONF_get_string(extconf, "default", "extensions");
 663             if (extsect == NULL) {
 664                 ERR_clear_error();
 665                 extsect = "default";
 666             }
 667         }
 668         X509V3_set_ctx_test(&ctx2);
 669         X509V3_set_nconf(&ctx2, extconf);
 670         if (!X509V3_EXT_add_nconf(extconf, &ctx2, extsect, NULL)) {
 671             BIO_printf(bio_err,
 672                        "Error checking extension section %s\n", extsect);
 673             goto end;
 674         }
 675     }
 676
 677     if (reqfile) {
 678         req = load_csr(infile, informat, "certificate request input");
 679         if (req == NULL)
 680             goto end;
 681
 682         if ((pkey = X509_REQ_get0_pubkey(req)) == NULL) {
 683             BIO_printf(bio_err, "Error unpacking public key from CSR\n");
 684             goto end;
 685         }
 686         i = do_X509_REQ_verify(req, pkey, vfyopts);
 687         if (i <= 0) {
 688             BIO_printf(bio_err, i < 0
 689                        ? "Error while verifying certificate request self-signature\n"
 690                        : "Certificate request self-signature did not match the contents\n");
 691             goto end;
 692         }
 693         BIO_printf(out, "Certificate request self-signature ok\n");
 694
 695         print_name(out, "subject=", X509_REQ_get_subject_name(req));
 696     } else if (!x509toreq && ext_copy != EXT_COPY_UNSET) {
 697         BIO_printf(bio_err, "Warning: ignoring -copy_extensions since neither -x509toreq nor -req is given\n");
 698     }
 699
 700     if (reqfile || newcert) {
 701         if (preserve_dates)
 702             BIO_printf(bio_err,
 703                        "Warning: ignoring -preserve_dates option with -req or -new\n");
 704         preserve_dates = 0;
 705         if (privkeyfile == NULL && CAkeyfile == NULL) {
 706             BIO_printf(bio_err,
 707                        "We need a private key to sign with, use -key or -CAkey or -CA with private key\n");
 708             goto end;
 709         }
 710         if ((x = X509_new_ex(app_get0_libctx(), app_get0_propq())) == NULL)
 711             goto end;
 712         if (sno == NULL) {
 713             sno = ASN1_INTEGER_new();
 714             if (sno == NULL || !rand_serial(NULL, sno))
 715                 goto end;
 716         }
 717         if (req != NULL && ext_copy != EXT_COPY_UNSET) {
 718             if (clrext && ext_copy != EXT_COPY_NONE) {
 719                 BIO_printf(bio_err, "Must not use -clrext together with -copy_extensions\n");
 720                 goto end;
 721             } else if (!copy_extensions(x, req, ext_copy)) {
 722                 BIO_printf(bio_err, "Error copying extensions from request\n");
 723                 goto end;
 724             }
 725         }
 726     } else {
 727         x = load_cert_pass(infile, 1, passin, "certificate");
 728         if (x == NULL)
 729             goto end;
 730     }
 731     if ((fsubj != NULL || req != NULL)
 732         && !X509_set_subject_name(x, fsubj != NULL ? fsubj :
 733                                   X509_REQ_get_subject_name(req)))
 734         goto end;
 735     if ((pubkey != NULL || privkey != NULL || req != NULL)
 736         && !X509_set_pubkey(x, pubkey != NULL ? pubkey :
 737                             privkey != NULL ? privkey :
 738                             X509_REQ_get0_pubkey(req)))
 739         goto end;
 740
 741     if (CAfile != NULL) {
 742         xca = load_cert_pass(CAfile, 1, passin, "CA certificate");
 743         if (xca == NULL)
 744             goto end;
 745     }
 746
 747     out = bio_open_default(outfile, 'w', outformat);
 748     if (out == NULL)
 749         goto end;
 750
 751     if (!noout || text || next_serial)
 752         OBJ_create("2.99999.3", "SET.ex3", "SET x509v3 extension 3");
 753     /* TODO: why is this strange object created (and no error checked)? */
 754
 755     if (alias)
 756         X509_alias_set1(x, (unsigned char *)alias, -1);
 757
 758     if (clrtrust)
 759         X509_trust_clear(x);
 760     if (clrreject)
 761         X509_reject_clear(x);
 762
 763     if (trust != NULL) {
 764         for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++)
 765             X509_add1_trust_object(x, sk_ASN1_OBJECT_value(trust, i));
 766     }
 767
 768     if (reject != NULL) {
 769         for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++)
 770             X509_add1_reject_object(x, sk_ASN1_OBJECT_value(reject, i));
 771     }
 772
 773     if (clrext && ext_names != NULL)
 774         BIO_printf(bio_err, "Warning: Ignoring -ext since -clrext is given\n");
 775     for (i = X509_get_ext_count(x) - 1; i >= 0; i--) {
 776         X509_EXTENSION *ex = X509_get_ext(x, i);
 777         const char *sn = OBJ_nid2sn(OBJ_obj2nid(X509_EXTENSION_get_object(ex)));
 778
 779         if (clrext || (ext_names != NULL && strstr(ext_names, sn) == NULL))
 780             X509_EXTENSION_free(X509_delete_ext(x, i));
 781     }
 782
 783     issuer_cert = x;
 784     if (CAfile != NULL) {
 785         issuer_cert = xca;
 786         if (sno == NULL)
 787             sno = x509_load_serial(CAfile, CAserial, CA_createserial);
 788         if (sno == NULL)
 789             goto end;
 790     }
 791
 792     if (sno != NULL && !X509_set_serialNumber(x, sno))
 793         goto end;
 794
 795     if (reqfile || newcert || privkey != NULL || CAfile != NULL) {
 796         if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
 797             goto end;
 798         if (!X509_set_issuer_name(x, X509_get_subject_name(issuer_cert)))
 799             goto end;
 800     }
 801
 802     X509V3_set_ctx(&ext_ctx, issuer_cert, x, req, NULL, X509V3_CTX_REPLACE);
 803     if (extconf != NULL) {
 804         X509V3_set_nconf(&ext_ctx, extconf);
 805         if (!X509V3_EXT_add_nconf(extconf, &ext_ctx, extsect, x)) {
 806             BIO_printf(bio_err,
 807                        "Error adding extensions from section %s\n", extsect);
 808             goto end;
 809         }
 810     }
 811
 812     /* At this point the contents of the certificate x have been finished. */
 813
 814     pkey = X509_get0_pubkey(x);
 815     if ((print_pubkey != 0 || modulus != 0) && pkey == NULL) {
 816         BIO_printf(bio_err, "Error getting public key\n");
 817         goto end;
 818     }
 819
 820     if (x509toreq) { /* also works in conjunction with -req */
 821         if (privkey == NULL) {
 822             BIO_printf(bio_err, "Must specify request key using -key\n");
 823             goto end;
 824         }
 825         if (clrext && ext_copy != EXT_COPY_NONE) {
 826             BIO_printf(bio_err, "Must not use -clrext together with -copy_extensions\n");
 827             goto end;
 828         }
 829         if ((rq = x509_to_req(x, privkey, digest, sigopts,
 830                               ext_copy, ext_names)) == NULL)
 831             goto end;
 832         if (!noout) {
 833             if (outformat == FORMAT_ASN1) {
 834                 X509_REQ_print_ex(out, rq, get_nameopt(), X509_FLAG_COMPAT);
 835                 i = i2d_X509_bio(out, x);
 836             } else {
 837                 i = PEM_write_bio_X509_REQ(out, rq);
 838             }
 839             if (!i) {
 840                 BIO_printf(bio_err,
 841                            "Unable to write certificate request\n");
 842                 goto end;
 843             }
 844         }
 845         noout = 1;
 846     } else if (privkey != NULL) {
 847         if (!do_X509_sign(x, privkey, digest, sigopts, &ext_ctx))
 848             goto end;
 849     } else if (CAfile != NULL) {
 850         if (!reqfile && !newcert) { /* certificate should be self-signed */
 851             X509_STORE_CTX *xsc = X509_STORE_CTX_new();
 852
 853             if (xsc == NULL || !X509_STORE_CTX_init(xsc, ctx, x, NULL)) {
 854                 BIO_printf(bio_err, "Error initialising X509 store\n");
 855                 X509_STORE_CTX_free(xsc);
 856                 goto end;
 857             }
 858             X509_STORE_CTX_set_cert(xsc, x);
 859             X509_STORE_CTX_set_flags(xsc, X509_V_FLAG_CHECK_SS_SIGNATURE);
 860             i = X509_verify_cert(xsc);
 861             X509_STORE_CTX_free(xsc);
 862             if (i <= 0)
 863                 goto end;
 864         }
 865         if ((CAkey = load_key(CAkeyfile, CAkeyformat,
 866                               0, passin, e, "CA private key")) == NULL)
 867             goto end;
 868         if (!X509_check_private_key(xca, CAkey)) {
 869             BIO_printf(bio_err,
 870                        "CA certificate and CA private key do not match\n");
 871             goto end;
 872         }
 873
 874         if (!do_X509_sign(x, CAkey, digest, sigopts, &ext_ctx))
 875             goto end;
 876     }
 877     if (badsig) {
 878         const ASN1_BIT_STRING *signature;
 879
 880         X509_get0_signature(&signature, NULL, x);
 881         corrupt_signature(signature);
 882     }
 883
 884     /* Process print options in the given order, as indicated by index i */
 885     for (i = 1; i <= num; i++) {
 886         if (i == issuer) {
 887             print_name(out, "issuer=", X509_get_issuer_name(x));
 888         } else if (i == subject) {
 889             print_name(out, "subject=", X509_get_subject_name(x));
 890         } else if (i == serial) {
 891             BIO_printf(out, "serial=");
 892             i2a_ASN1_INTEGER(out, X509_get0_serialNumber(x));
 893             BIO_printf(out, "\n");
 894         } else if (i == next_serial) {
 895             ASN1_INTEGER *ser;
 896             BIGNUM *bnser = ASN1_INTEGER_to_BN(X509_get0_serialNumber(x), NULL);
 897
 898             if (bnser == NULL)
 899                 goto end;
 900             if (!BN_add_word(bnser, 1)
 901                     || (ser = BN_to_ASN1_INTEGER(bnser, NULL)) == NULL) {
 902                 BN_free(bnser);
 903                 goto end;
 904             }
 905             BN_free(bnser);
 906             i2a_ASN1_INTEGER(out, ser);
 907             ASN1_INTEGER_free(ser);
 908             BIO_puts(out, "\n");
 909         } else if (i == email || i == ocsp_uri) {
 910             STACK_OF(OPENSSL_STRING) *emlst =
 911                 i == email ? X509_get1_email(x) : X509_get1_ocsp(x);
 912
 913             for (j = 0; j < sk_OPENSSL_STRING_num(emlst); j++)
 914                 BIO_printf(out, "%s\n", sk_OPENSSL_STRING_value(emlst, j));
 915             X509_email_free(emlst);
 916         } else if (i == aliasout) {
 917             unsigned char *alstr = X509_alias_get0(x, NULL);
 918
 919             if (alstr)
 920                 BIO_printf(out, "%s\n", alstr);
 921             else
 922                 BIO_puts(out, "<No Alias>\n");
 923         } else if (i == subject_hash) {
 924             BIO_printf(out, "%08lx\n", X509_subject_name_hash(x));
 925 #ifndef OPENSSL_NO_MD5
 926         } else if (i == subject_hash_old) {
 927             BIO_printf(out, "%08lx\n", X509_subject_name_hash_old(x));
 928 #endif
 929         } else if (i == issuer_hash) {
 930             BIO_printf(out, "%08lx\n", X509_issuer_name_hash(x));
 931 #ifndef OPENSSL_NO_MD5
 932         } else if (i == issuer_hash_old) {
 933             BIO_printf(out, "%08lx\n", X509_issuer_name_hash_old(x));
 934 #endif
 935         } else if (i == pprint) {
 936             BIO_printf(out, "Certificate purposes:\n");
 937             for (j = 0; j < X509_PURPOSE_get_count(); j++)
 938                 purpose_print(out, x, X509_PURPOSE_get0(j));
 939         } else if (i == modulus) {
 940             BIO_printf(out, "Modulus=");
 941             if (EVP_PKEY_is_a(pkey, "RSA")) {
 942                 BIGNUM *n;
 943
 944                 /* Every RSA key has an 'n' */
 945                 EVP_PKEY_get_bn_param(pkey, "n", &n);
 946                 BN_print(out, n);
 947                 BN_free(n);
 948             } else if (EVP_PKEY_is_a(pkey, "DSA")) {
 949                 BIGNUM *dsapub;
 950
 951                 /* Every DSA key has a 'pub' */
 952                 EVP_PKEY_get_bn_param(pkey, "pub", &dsapub);
 953                 BN_print(out, dsapub);
 954                 BN_free(dsapub);
 955             } else {
 956                 BIO_printf(out, "No modulus for this public key type");
 957             }
 958             BIO_printf(out, "\n");
 959         } else if (i == print_pubkey) {
 960             PEM_write_bio_PUBKEY(out, pkey);
 961         } else if (i == text) {
 962             X509_print_ex(out, x, get_nameopt(), certflag);
 963         } else if (i == startdate) {
 964             BIO_puts(out, "notBefore=");
 965             ASN1_TIME_print(out, X509_get0_notBefore(x));
 966             BIO_puts(out, "\n");
 967         } else if (i == enddate) {
 968             BIO_puts(out, "notAfter=");
 969             ASN1_TIME_print(out, X509_get0_notAfter(x));
 970             BIO_puts(out, "\n");
 971         } else if (i == fingerprint) {
 972             unsigned int n;
 973             unsigned char md[EVP_MAX_MD_SIZE];
 974             const EVP_MD *fdig = digest;
 975
 976             if (fdig == NULL)
 977                 fdig = EVP_sha1();
 978
 979             if (!X509_digest(x, fdig, md, &n)) {
 980                 BIO_printf(bio_err, "Out of memory\n");
 981                 goto end;
 982             }
 983             BIO_printf(out, "%s Fingerprint=", EVP_MD_name(fdig));
 984             for (j = 0; j < (int)n; j++)
 985                 BIO_printf(out, "%02X%c", md[j], (j + 1 == (int)n) ? '\n' : ':');
 986         } else if (i == ocspid) {
 987             X509_ocspid_print(out, x);
 988         } else if (i == ext) {
 989             print_x509v3_exts(out, x, ext_names);
 990         }
 991     }
 992
 993     if (checkend) {
 994         time_t tcheck = time(NULL) + checkoffset;
 995
 996         ret = X509_cmp_time(X509_get0_notAfter(x), &tcheck) < 0;
 997         if (ret)
 998             BIO_printf(out, "Certificate will expire\n");
 999         else
1000             BIO_printf(out, "Certificate will not expire\n");
1001         goto end;
1002     }
1003
1004     print_cert_checks(out, x, checkhost, checkemail, checkip);
1005
1006     if (noout || nocert) {
1007         ret = 0;
1008         goto end;
1009     }
1010
1011     if (outformat == FORMAT_ASN1) {
1012         i = i2d_X509_bio(out, x);
1013     } else if (outformat == FORMAT_PEM) {
1014         if (trustout)
1015             i = PEM_write_bio_X509_AUX(out, x);
1016         else
1017             i = PEM_write_bio_X509(out, x);
1018     } else {
1019         BIO_printf(bio_err, "Bad output format specified for outfile\n");
1020         goto end;
1021     }
1022     if (!i) {
1023         BIO_printf(bio_err, "Unable to write certificate\n");
1024         goto end;
1025     }
1026     ret = 0;
1027
1028  end:
1029     if (ret != 0)
1030         ERR_print_errors(bio_err);
1031     NCONF_free(extconf);
1032     BIO_free_all(out);
1033     X509_STORE_free(ctx);
1034     X509_NAME_free(fsubj);
1035     X509_REQ_free(req);
1036     X509_free(x);
1037     X509_free(xca);
1038     EVP_PKEY_free(privkey);
1039     EVP_PKEY_free(CAkey);
1040     EVP_PKEY_free(pubkey);
1041     sk_OPENSSL_STRING_free(sigopts);
1042     sk_OPENSSL_STRING_free(vfyopts);
1043     X509_REQ_free(rq);
1044     ASN1_INTEGER_free(sno);
1045     sk_ASN1_OBJECT_pop_free(trust, ASN1_OBJECT_free);
1046     sk_ASN1_OBJECT_pop_free(reject, ASN1_OBJECT_free);
1047     release_engine(e);
1048     clear_free(passin);
1049     return ret;
1050 }
1051
1052 static ASN1_INTEGER *x509_load_serial(const char *CAfile,
1053                                       const char *serialfile, int create)
1054 {
1055     char *buf = NULL;
1056     ASN1_INTEGER *bs = NULL;
1057     BIGNUM *serial = NULL;
1058
1059     if (serialfile == NULL) {
1060         const char *p = strrchr(CAfile, '.');
1061         size_t len = p != NULL ? (size_t)(p - CAfile) : strlen(CAfile);
1062
1063         buf = app_malloc(len + sizeof(POSTFIX), "serial# buffer");
1064         memcpy(buf, CAfile, len);
1065         memcpy(buf + len, POSTFIX, sizeof(POSTFIX));
1066         serialfile = buf;
1067     }
1068
1069     serial = load_serial(serialfile, create, NULL);
1070     if (serial == NULL)
1071         goto end;
1072
1073     if (!BN_add_word(serial, 1)) {
1074         BIO_printf(bio_err, "Serial number increment failure\n");
1075         goto end;
1076     }
1077
1078     if (!save_serial(serialfile, NULL, serial, &bs))
1079         goto end;
1080
1081  end:
1082     OPENSSL_free(buf);
1083     BN_free(serial);
1084     return bs;
1085 }
1086
1087 static int callb(int ok, X509_STORE_CTX *ctx)
1088 {
1089     int err;
1090     X509 *err_cert;
1091
1092     /*
1093      * It is ok to use a self-signed certificate. This case will catch both
1094      * the initial ok == 0 and the final ok == 1 calls to this function.
1095      */
1096     err = X509_STORE_CTX_get_error(ctx);
1097     if (err == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
1098         return 1;
1099
1100     /*
1101      * BAD we should have gotten an error.  Normally if everything worked
1102      * X509_STORE_CTX_get_error(ctx) will still be set to
1103      * DEPTH_ZERO_SELF_....
1104      */
1105     if (ok) {
1106         BIO_printf(bio_err,
1107                    "Error with certificate to be certified - should be self-signed\n");
1108         return 0;
1109     } else {
1110         err_cert = X509_STORE_CTX_get_current_cert(ctx);
1111         print_name(bio_err, "subject=", X509_get_subject_name(err_cert));
1112         BIO_printf(bio_err,
1113                    "Error with certificate - error %d at depth %d\n%s\n", err,
1114                    X509_STORE_CTX_get_error_depth(ctx),
1115                    X509_verify_cert_error_string(err));
1116         return 1;
1117     }
1118 }
1119
1120 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt)
1121 {
1122     int id, i, idret;
1123     const char *pname;
1124     id = X509_PURPOSE_get_id(pt);
1125     pname = X509_PURPOSE_get0_name(pt);
1126     for (i = 0; i < 2; i++) {
1127         idret = X509_check_purpose(cert, id, i);
1128         BIO_printf(bio, "%s%s : ", pname, i ? " CA" : "");
1129         if (idret == 1)
1130             BIO_printf(bio, "Yes\n");
1131         else if (idret == 0)
1132             BIO_printf(bio, "No\n");
1133         else
1134             BIO_printf(bio, "Yes (WARNING code=%d)\n", idret);
1135     }
1136     return 1;
1137 }
1138
1139 static int parse_ext_names(char *names, const char **result)
1140 {
1141     char *p, *q;
1142     int cnt = 0, len = 0;
1143
1144     p = q = names;
1145     len = strlen(names);
1146
1147     while (q - names <= len) {
1148         if (*q != ',' && *q != '\0') {
1149             q++;
1150             continue;
1151         }
1152         if (p != q) {
1153             /* found */
1154             if (result != NULL) {
1155                 result[cnt] = p;
1156                 *q = '\0';
1157             }
1158             cnt++;
1159         }
1160         p = ++q;
1161     }
1162
1163     return cnt;
1164 }
1165
1166 static int print_x509v3_exts(BIO *bio, X509 *x, const char *ext_names)
1167 {
1168     const STACK_OF(X509_EXTENSION) *exts = NULL;
1169     STACK_OF(X509_EXTENSION) *exts2 = NULL;
1170     X509_EXTENSION *ext = NULL;
1171     ASN1_OBJECT *obj;
1172     int i, j, ret = 0, num, nn = 0;
1173     const char *sn, **names = NULL;
1174     char *tmp_ext_names = NULL;
1175
1176     exts = X509_get0_extensions(x);
1177     if ((num = sk_X509_EXTENSION_num(exts)) <= 0) {
1178         BIO_printf(bio_err, "No extensions in certificate\n");
1179         ret = 1;
1180         goto end;
1181     }
1182
1183     /* parse comma separated ext name string */
1184     if ((tmp_ext_names = OPENSSL_strdup(ext_names)) == NULL)
1185         goto end;
1186     if ((nn = parse_ext_names(tmp_ext_names, NULL)) == 0) {
1187         BIO_printf(bio, "Invalid extension names: %s\n", ext_names);
1188         goto end;
1189     }
1190     if ((names = OPENSSL_malloc(sizeof(char *) * nn)) == NULL)
1191         goto end;
1192     parse_ext_names(tmp_ext_names, names);
1193
1194     for (i = 0; i < num; i++) {
1195         ext = sk_X509_EXTENSION_value(exts, i);
1196
1197         /* check if this ext is what we want */
1198         obj = X509_EXTENSION_get_object(ext);
1199         sn = OBJ_nid2sn(OBJ_obj2nid(obj));
1200         if (sn == NULL || strcmp(sn, "UNDEF") == 0)
1201             continue;
1202
1203         for (j = 0; j < nn; j++) {
1204             if (strcmp(sn, names[j]) == 0) {
1205                 /* push the extension into a new stack */
1206                 if (exts2 == NULL
1207                     && (exts2 = sk_X509_EXTENSION_new_null()) == NULL)
1208                     goto end;
1209                 if (!sk_X509_EXTENSION_push(exts2, ext))
1210                     goto end;
1211             }
1212         }
1213     }
1214
1215     if (!sk_X509_EXTENSION_num(exts2)) {
1216         BIO_printf(bio, "No extensions matched with %s\n", ext_names);
1217         ret = 1;
1218         goto end;
1219     }
1220
1221     ret = X509V3_extensions_print(bio, NULL, exts2, 0, 0);
1222  end:
1223     sk_X509_EXTENSION_free(exts2);
1224     OPENSSL_free(names);
1225     OPENSSL_free(tmp_ext_names);
1226     return ret;
1227 }