apps/x509.c

   1 /*
   2  * Copyright 1995-2018 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 #ifndef OPENSSL_NO_RSA
  25 # include <openssl/rsa.h>
  26 #endif
  27 #ifndef OPENSSL_NO_DSA
  28 # include <openssl/dsa.h>
  29 #endif
  30
  31 #undef POSTFIX
  32 #define POSTFIX ".srl"
  33 #define DEF_DAYS        30
  34
  35 static int callb(int ok, X509_STORE_CTX *ctx);
  36 static int sign(X509 *x, EVP_PKEY *pkey, EVP_PKEY *fkey, int days, int clrext,
  37                 const EVP_MD *digest, CONF *conf, const char *section,
  38                 int preserve_dates);
  39 static int x509_certify(X509_STORE *ctx, const char *CAfile, const EVP_MD *digest,
  40                         X509 *x, X509 *xca, EVP_PKEY *pkey,
  41                         STACK_OF(OPENSSL_STRING) *sigopts, const char *serialfile,
  42                         int create, int days, int clrext, CONF *conf,
  43                         const char *section, ASN1_INTEGER *sno, int reqfile,
  44                         int preserve_dates);
  45 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt);
  46 static int print_x509v3_exts(BIO *bio, X509 *x, const char *exts);
  47
  48 typedef enum OPTION_choice {
  49     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  50     OPT_INFORM, OPT_OUTFORM, OPT_KEYFORM, OPT_REQ, OPT_CAFORM,
  51     OPT_CAKEYFORM, OPT_SIGOPT, OPT_DAYS, OPT_PASSIN, OPT_EXTFILE,
  52     OPT_EXTENSIONS, OPT_IN, OPT_OUT, OPT_SIGNKEY, OPT_CA, OPT_CAKEY,
  53     OPT_CASERIAL, OPT_SET_SERIAL, OPT_NEW, OPT_FORCE_PUBKEY, OPT_SUBJ,
  54     OPT_ADDTRUST, OPT_ADDREJECT, OPT_SETALIAS, OPT_CERTOPT, OPT_NAMEOPT,
  55     OPT_C, OPT_EMAIL, OPT_OCSP_URI, OPT_SERIAL, OPT_NEXT_SERIAL,
  56     OPT_MODULUS, OPT_PUBKEY, OPT_X509TOREQ, OPT_TEXT, OPT_HASH,
  57     OPT_ISSUER_HASH, OPT_SUBJECT, OPT_ISSUER, OPT_FINGERPRINT, OPT_DATES,
  58     OPT_PURPOSE, OPT_STARTDATE, OPT_ENDDATE, OPT_CHECKEND, OPT_CHECKHOST,
  59     OPT_CHECKEMAIL, OPT_CHECKIP, OPT_NOOUT, OPT_TRUSTOUT, OPT_CLRTRUST,
  60     OPT_CLRREJECT, OPT_ALIAS, OPT_CACREATESERIAL, OPT_CLREXT, OPT_OCSPID,
  61     OPT_SUBJECT_HASH_OLD,
  62     OPT_ISSUER_HASH_OLD,
  63     OPT_BADSIG, OPT_MD, OPT_ENGINE, OPT_NOCERT, OPT_PRESERVE_DATES,
  64     OPT_R_ENUM, OPT_EXT
  65 } OPTION_CHOICE;
  66
  67 const OPTIONS x509_options[] = {
  68     OPT_SECTION("General"),
  69     {"help", OPT_HELP, '-', "Display this summary"},
  70 #ifndef OPENSSL_NO_ENGINE
  71     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  72 #endif
  73
  74     {"inform", OPT_INFORM, 'f',
  75      "Input format - default PEM (one of DER or PEM)"},
  76     {"in", OPT_IN, '<', "Input file - default stdin"},
  77     {"passin", OPT_PASSIN, 's', "Private key password/pass-phrase source"},
  78     {"outform", OPT_OUTFORM, 'f',
  79      "Output format - default PEM (one of DER or PEM)"},
  80     {"out", OPT_OUT, '>', "Output file - default stdout"},
  81     {"keyform", OPT_KEYFORM, 'E', "Private key format - default PEM"},
  82     {"req", OPT_REQ, '-', "Input is a certificate request, sign and output"},
  83
  84     OPT_SECTION("Output"),
  85     {"serial", OPT_SERIAL, '-', "Print serial number value"},
  86     {"subject_hash", OPT_HASH, '-', "Print subject hash value"},
  87     {"issuer_hash", OPT_ISSUER_HASH, '-', "Print issuer hash value"},
  88     {"hash", OPT_HASH, '-', "Synonym for -subject_hash"},
  89     {"subject", OPT_SUBJECT, '-', "Print subject DN"},
  90     {"issuer", OPT_ISSUER, '-', "Print issuer DN"},
  91     {"email", OPT_EMAIL, '-', "Print email address(es)"},
  92     {"purpose", OPT_PURPOSE, '-', "Print out certificate purposes"},
  93     {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
  94     {"pubkey", OPT_PUBKEY, '-', "Output the public key"},
  95     {"fingerprint", OPT_FINGERPRINT, '-', "Print the certificate fingerprint"},
  96     {"alias", OPT_ALIAS, '-', "Output certificate alias"},
  97     {"noout", OPT_NOOUT, '-', "No output, just status"},
  98     {"ocspid", OPT_OCSPID, '-',
  99      "Print OCSP hash values for the subject name and public key"},
 100     {"ocsp_uri", OPT_OCSP_URI, '-', "Print OCSP Responder URL(s)"},
 101     {"nocert", OPT_NOCERT, '-', "No certificate output"},
 102     {"trustout", OPT_TRUSTOUT, '-', "Output a trusted certificate"},
 103     {"x509toreq", OPT_X509TOREQ, '-',
 104      "Output a certification request object"},
 105     {"checkend", OPT_CHECKEND, 'M',
 106      "Check whether the cert expires in the next arg seconds"},
 107     {OPT_MORE_STR, 1, 1, "Exit 1 if so, 0 if not"},
 108     {"text", OPT_TEXT, '-', "Print the certificate in text form"},
 109     {"ext", OPT_EXT, 's', "Print various X509V3 extensions"},
 110     {"C", OPT_C, '-', "Print out C code forms"},
 111 #ifndef OPENSSL_NO_MD5
 112     {"subject_hash_old", OPT_SUBJECT_HASH_OLD, '-',
 113      "Print old-style (MD5) issuer hash value"},
 114     {"issuer_hash_old", OPT_ISSUER_HASH_OLD, '-',
 115      "Print old-style (MD5) subject hash value"},
 116 #endif
 117     {"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"},
 118
 119     OPT_SECTION("Certificate"),
 120     {"startdate", OPT_STARTDATE, '-', "Set notBefore field"},
 121     {"enddate", OPT_ENDDATE, '-', "Set notAfter field"},
 122     {"dates", OPT_DATES, '-', "Both Before and After dates"},
 123     {"clrtrust", OPT_CLRTRUST, '-', "Clear all trusted purposes"},
 124     {"clrext", OPT_CLREXT, '-', "Clear all certificate extensions"},
 125     {"addtrust", OPT_ADDTRUST, 's', "Trust certificate for a given purpose"},
 126     {"addreject", OPT_ADDREJECT, 's',
 127      "Reject certificate for a given purpose"},
 128     {"setalias", OPT_SETALIAS, 's', "Set certificate alias"},
 129     {"days", OPT_DAYS, 'n',
 130      "How long till expiry of a signed certificate - def 30 days"},
 131     {"signkey", OPT_SIGNKEY, 's', "Self sign cert with arg"},
 132     {"set_serial", OPT_SET_SERIAL, 's', "Serial number to use"},
 133     {"extensions", OPT_EXTENSIONS, 's', "Section from config file to use"},
 134     {"certopt", OPT_CERTOPT, 's', "Various certificate text options"},
 135     {"checkhost", OPT_CHECKHOST, 's', "Check certificate matches host"},
 136     {"checkemail", OPT_CHECKEMAIL, 's', "Check certificate matches email"},
 137     {"checkip", OPT_CHECKIP, 's', "Check certificate matches ipaddr"},
 138     {"force_pubkey", OPT_FORCE_PUBKEY, '<', "Force the key to put inside certificate"},
 139     {"subj", OPT_SUBJ, 's', "Set or override certificate subject (and issuer)"},
 140
 141     OPT_SECTION("CA"),
 142     {"CA", OPT_CA, '<', "Set the CA certificate, must be PEM format"},
 143     {"CAkey", OPT_CAKEY, 's',
 144      "The CA key, must be PEM format; if not in CAfile"},
 145     {"extfile", OPT_EXTFILE, '<', "File with X509V3 extensions to add"},
 146     OPT_R_OPTIONS,
 147     {"CAform", OPT_CAFORM, 'F', "CA format - default PEM"},
 148     {"CAkeyform", OPT_CAKEYFORM, 'f', "CA key format - default PEM"},
 149     {"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
 150     {"CAcreateserial", OPT_CACREATESERIAL, '-',
 151      "Create serial number file if it does not exist"},
 152     {"CAserial", OPT_CASERIAL, 's', "Serial file"},
 153     {"new", OPT_NEW, '-', "Generate a certificate from scratch"},
 154     {"next_serial", OPT_NEXT_SERIAL, '-', "Increment current certificate serial number"},
 155     {"clrreject", OPT_CLRREJECT, '-',
 156      "Clears all the prohibited or rejected uses of the certificate"},
 157     {"badsig", OPT_BADSIG, '-', "Corrupt last byte of certificate signature (for test)"},
 158     {"", OPT_MD, '-', "Any supported digest"},
 159     {"preserve_dates", OPT_PRESERVE_DATES, '-', "preserve existing dates when signing"},
 160     {NULL}
 161 };
 162
 163 int x509_main(int argc, char **argv)
 164 {
 165     ASN1_INTEGER *sno = NULL;
 166     ASN1_OBJECT *objtmp = NULL;
 167     BIO *out = NULL;
 168     CONF *extconf = NULL;
 169     EVP_PKEY *Upkey = NULL, *CApkey = NULL, *fkey = NULL;
 170     int newcert = 0;
 171     char *subj = NULL;
 172     X509_NAME *fsubj = NULL;
 173     const unsigned long chtype = MBSTRING_ASC;
 174     const int multirdn = 0;
 175     STACK_OF(ASN1_OBJECT) *trust = NULL, *reject = NULL;
 176     STACK_OF(OPENSSL_STRING) *sigopts = NULL;
 177     X509 *x = NULL, *xca = NULL;
 178     X509_REQ *req = NULL, *rq = NULL;
 179     X509_STORE *ctx = NULL;
 180     const EVP_MD *digest = NULL;
 181     char *CAkeyfile = NULL, *CAserial = NULL, *fkeyfile = NULL, *alias = NULL;
 182     char *checkhost = NULL, *checkemail = NULL, *checkip = NULL, *exts = NULL;
 183     char *extsect = NULL, *extfile = NULL, *passin = NULL, *passinarg = NULL;
 184     char *infile = NULL, *outfile = NULL, *keyfile = NULL, *CAfile = NULL;
 185     char *prog;
 186     int x509req = 0, days = DEF_DAYS, modulus = 0, pubkey = 0, pprint = 0;
 187     int C = 0, CAformat = FORMAT_PEM, CAkeyformat = FORMAT_PEM;
 188     int fingerprint = 0, reqfile = 0, checkend = 0;
 189     int informat = FORMAT_PEM, outformat = FORMAT_PEM, keyformat = FORMAT_PEM;
 190     int next_serial = 0, subject_hash = 0, issuer_hash = 0, ocspid = 0;
 191     int noout = 0, sign_flag = 0, CA_flag = 0, CA_createserial = 0, email = 0;
 192     int ocsp_uri = 0, trustout = 0, clrtrust = 0, clrreject = 0, aliasout = 0;
 193     int ret = 1, i, num = 0, badsig = 0, clrext = 0, nocert = 0;
 194     int text = 0, serial = 0, subject = 0, issuer = 0, startdate = 0, ext = 0;
 195     int enddate = 0;
 196     time_t checkoffset = 0;
 197     unsigned long certflag = 0;
 198     int preserve_dates = 0;
 199     OPTION_CHOICE o;
 200     ENGINE *e = NULL;
 201 #ifndef OPENSSL_NO_MD5
 202     int subject_hash_old = 0, issuer_hash_old = 0;
 203 #endif
 204
 205     ctx = X509_STORE_new();
 206     if (ctx == NULL)
 207         goto end;
 208     X509_STORE_set_verify_cb(ctx, callb);
 209
 210     prog = opt_init(argc, argv, x509_options);
 211     while ((o = opt_next()) != OPT_EOF) {
 212         switch (o) {
 213         case OPT_EOF:
 214         case OPT_ERR:
 215  opthelp:
 216             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 217             goto end;
 218         case OPT_HELP:
 219             opt_help(x509_options);
 220             ret = 0;
 221             goto end;
 222         case OPT_INFORM:
 223             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 224                 goto opthelp;
 225             break;
 226         case OPT_IN:
 227             infile = opt_arg();
 228             break;
 229         case OPT_OUTFORM:
 230             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 231                 goto opthelp;
 232             break;
 233         case OPT_KEYFORM:
 234             if (!opt_format(opt_arg(), OPT_FMT_PDE, &keyformat))
 235                 goto opthelp;
 236             break;
 237         case OPT_CAFORM:
 238             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &CAformat))
 239                 goto opthelp;
 240             break;
 241         case OPT_CAKEYFORM:
 242             if (!opt_format(opt_arg(), OPT_FMT_ANY, &CAkeyformat))
 243                 goto opthelp;
 244             break;
 245         case OPT_OUT:
 246             outfile = opt_arg();
 247             break;
 248         case OPT_REQ:
 249             reqfile = 1;
 250             break;
 251
 252         case OPT_SIGOPT:
 253             if (!sigopts)
 254                 sigopts = sk_OPENSSL_STRING_new_null();
 255             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 256                 goto opthelp;
 257             break;
 258         case OPT_DAYS:
 259             if (preserve_dates)
 260                 goto opthelp;
 261             days = atoi(opt_arg());
 262             break;
 263         case OPT_PASSIN:
 264             passinarg = opt_arg();
 265             break;
 266         case OPT_EXTFILE:
 267             extfile = opt_arg();
 268             break;
 269         case OPT_R_CASES:
 270             if (!opt_rand(o))
 271                 goto end;
 272             break;
 273         case OPT_EXTENSIONS:
 274             extsect = opt_arg();
 275             break;
 276         case OPT_SIGNKEY:
 277             keyfile = opt_arg();
 278             sign_flag = ++num;
 279             break;
 280         case OPT_CA:
 281             CAfile = opt_arg();
 282             CA_flag = ++num;
 283             break;
 284         case OPT_CAKEY:
 285             CAkeyfile = opt_arg();
 286             break;
 287         case OPT_CASERIAL:
 288             CAserial = opt_arg();
 289             break;
 290         case OPT_SET_SERIAL:
 291             if (sno != NULL) {
 292                 BIO_printf(bio_err, "Serial number supplied twice\n");
 293                 goto opthelp;
 294             }
 295             if ((sno = s2i_ASN1_INTEGER(NULL, opt_arg())) == NULL)
 296                 goto opthelp;
 297             break;
 298         case OPT_NEW:
 299             newcert = 1;
 300             break;
 301         case OPT_FORCE_PUBKEY:
 302             fkeyfile = opt_arg();
 303             break;
 304         case OPT_SUBJ:
 305             subj = opt_arg();
 306             break;
 307         case OPT_ADDTRUST:
 308             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 309                 BIO_printf(bio_err,
 310                            "%s: Invalid trust object value %s\n",
 311                            prog, opt_arg());
 312                 goto opthelp;
 313             }
 314             if (trust == NULL && (trust = sk_ASN1_OBJECT_new_null()) == NULL)
 315                 goto end;
 316             sk_ASN1_OBJECT_push(trust, objtmp);
 317             objtmp = NULL;
 318             trustout = 1;
 319             break;
 320         case OPT_ADDREJECT:
 321             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 322                 BIO_printf(bio_err,
 323                            "%s: Invalid reject object value %s\n",
 324                            prog, opt_arg());
 325                 goto opthelp;
 326             }
 327             if (reject == NULL
 328                 && (reject = sk_ASN1_OBJECT_new_null()) == NULL)
 329                 goto end;
 330             sk_ASN1_OBJECT_push(reject, objtmp);
 331             objtmp = NULL;
 332             trustout = 1;
 333             break;
 334         case OPT_SETALIAS:
 335             alias = opt_arg();
 336             trustout = 1;
 337             break;
 338         case OPT_CERTOPT:
 339             if (!set_cert_ex(&certflag, opt_arg()))
 340                 goto opthelp;
 341             break;
 342         case OPT_NAMEOPT:
 343             if (!set_nameopt(opt_arg()))
 344                 goto opthelp;
 345             break;
 346         case OPT_ENGINE:
 347             e = setup_engine(opt_arg(), 0);
 348             break;
 349         case OPT_C:
 350             C = ++num;
 351             break;
 352         case OPT_EMAIL:
 353             email = ++num;
 354             break;
 355         case OPT_OCSP_URI:
 356             ocsp_uri = ++num;
 357             break;
 358         case OPT_SERIAL:
 359             serial = ++num;
 360             break;
 361         case OPT_NEXT_SERIAL:
 362             next_serial = ++num;
 363             break;
 364         case OPT_MODULUS:
 365             modulus = ++num;
 366             break;
 367         case OPT_PUBKEY:
 368             pubkey = ++num;
 369             break;
 370         case OPT_X509TOREQ:
 371             x509req = ++num;
 372             break;
 373         case OPT_TEXT:
 374             text = ++num;
 375             break;
 376         case OPT_SUBJECT:
 377             subject = ++num;
 378             break;
 379         case OPT_ISSUER:
 380             issuer = ++num;
 381             break;
 382         case OPT_FINGERPRINT:
 383             fingerprint = ++num;
 384             break;
 385         case OPT_HASH:
 386             subject_hash = ++num;
 387             break;
 388         case OPT_ISSUER_HASH:
 389             issuer_hash = ++num;
 390             break;
 391         case OPT_PURPOSE:
 392             pprint = ++num;
 393             break;
 394         case OPT_STARTDATE:
 395             startdate = ++num;
 396             break;
 397         case OPT_ENDDATE:
 398             enddate = ++num;
 399             break;
 400         case OPT_NOOUT:
 401             noout = ++num;
 402             break;
 403         case OPT_EXT:
 404             ext = ++num;
 405             exts = opt_arg();
 406             break;
 407         case OPT_NOCERT:
 408             nocert = 1;
 409             break;
 410         case OPT_TRUSTOUT:
 411             trustout = 1;
 412             break;
 413         case OPT_CLRTRUST:
 414             clrtrust = ++num;
 415             break;
 416         case OPT_CLRREJECT:
 417             clrreject = ++num;
 418             break;
 419         case OPT_ALIAS:
 420             aliasout = ++num;
 421             break;
 422         case OPT_CACREATESERIAL:
 423             CA_createserial = ++num;
 424             break;
 425         case OPT_CLREXT:
 426             clrext = 1;
 427             break;
 428         case OPT_OCSPID:
 429             ocspid = ++num;
 430             break;
 431         case OPT_BADSIG:
 432             badsig = 1;
 433             break;
 434 #ifndef OPENSSL_NO_MD5
 435         case OPT_SUBJECT_HASH_OLD:
 436             subject_hash_old = ++num;
 437             break;
 438         case OPT_ISSUER_HASH_OLD:
 439             issuer_hash_old = ++num;
 440             break;
 441 #else
 442         case OPT_SUBJECT_HASH_OLD:
 443         case OPT_ISSUER_HASH_OLD:
 444             break;
 445 #endif
 446         case OPT_DATES:
 447             startdate = ++num;
 448             enddate = ++num;
 449             break;
 450         case OPT_CHECKEND:
 451             checkend = 1;
 452             {
 453                 intmax_t temp = 0;
 454                 if (!opt_imax(opt_arg(), &temp))
 455                     goto opthelp;
 456                 checkoffset = (time_t)temp;
 457                 if ((intmax_t)checkoffset != temp) {
 458                     BIO_printf(bio_err, "%s: checkend time out of range %s\n",
 459                                prog, opt_arg());
 460                     goto opthelp;
 461                 }
 462             }
 463             break;
 464         case OPT_CHECKHOST:
 465             checkhost = opt_arg();
 466             break;
 467         case OPT_CHECKEMAIL:
 468             checkemail = opt_arg();
 469             break;
 470         case OPT_CHECKIP:
 471             checkip = opt_arg();
 472             break;
 473         case OPT_PRESERVE_DATES:
 474             if (days != DEF_DAYS)
 475                 goto opthelp;
 476             preserve_dates = 1;
 477             break;
 478         case OPT_MD:
 479             if (!opt_md(opt_unknown(), &digest))
 480                 goto opthelp;
 481         }
 482     }
 483     argc = opt_num_rest();
 484     argv = opt_rest();
 485     if (argc != 0) {
 486         BIO_printf(bio_err, "%s: Unknown parameter %s\n", prog, argv[0]);
 487         goto opthelp;
 488     }
 489
 490     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 491         BIO_printf(bio_err, "Error getting password\n");
 492         goto end;
 493     }
 494
 495     if (!X509_STORE_set_default_paths(ctx)) {
 496         ERR_print_errors(bio_err);
 497         goto end;
 498     }
 499
 500     if (newcert && infile != NULL) {
 501         BIO_printf(bio_err, "The -in option must not be used since -new is set\n");
 502         goto end;
 503     }
 504     if (newcert && fkeyfile == NULL) {
 505         BIO_printf(bio_err,
 506                    "The -new option requires a public key to be set using -force_pubkey\n");
 507         goto end;
 508     }
 509     if (fkeyfile != NULL) {
 510         fkey = load_pubkey(fkeyfile, keyformat, 0, NULL, e, "Forced key");
 511         if (fkey == NULL)
 512             goto end;
 513     }
 514
 515     if (newcert && subj == NULL) {
 516         BIO_printf(bio_err,
 517                    "The -new option requires a subject to be set using -subj\n");
 518         goto end;
 519     }
 520     if (subj != NULL && (fsubj = parse_name(subj, chtype, multirdn)) == NULL)
 521         goto end;
 522
 523     if (CAkeyfile == NULL && CA_flag && CAformat == FORMAT_PEM) {
 524         CAkeyfile = CAfile;
 525     } else if (CA_flag && CAkeyfile == NULL) {
 526         BIO_printf(bio_err,
 527                    "need to specify a CAkey if using the CA command\n");
 528         goto end;
 529     } else if (!CA_flag && CAkeyfile != NULL) {
 530         BIO_printf(bio_err,
 531                    "ignoring -CAkey option since no -CA option is given\n");
 532     }
 533
 534     if (extfile != NULL) {
 535         X509V3_CTX ctx2;
 536         if ((extconf = app_load_config(extfile)) == NULL)
 537             goto end;
 538         if (extsect == NULL) {
 539             extsect = NCONF_get_string(extconf, "default", "extensions");
 540             if (extsect == NULL) {
 541                 ERR_clear_error();
 542                 extsect = "default";
 543             }
 544         }
 545         X509V3_set_ctx_test(&ctx2);
 546         X509V3_set_nconf(&ctx2, extconf);
 547         if (!X509V3_EXT_add_nconf(extconf, &ctx2, extsect, NULL)) {
 548             BIO_printf(bio_err,
 549                        "Error Loading extension section %s\n", extsect);
 550             ERR_print_errors(bio_err);
 551             goto end;
 552         }
 553     }
 554
 555     if (reqfile) {
 556         EVP_PKEY *pkey;
 557         BIO *in;
 558
 559         in = bio_open_default(infile, 'r', informat);
 560         if (in == NULL)
 561             goto end;
 562         req = PEM_read_bio_X509_REQ(in, NULL, NULL, NULL);
 563         BIO_free(in);
 564
 565         if (req == NULL) {
 566             ERR_print_errors(bio_err);
 567             goto end;
 568         }
 569
 570         if ((pkey = X509_REQ_get0_pubkey(req)) == NULL) {
 571             BIO_printf(bio_err, "error unpacking public key\n");
 572             goto end;
 573         }
 574         i = X509_REQ_verify(req, pkey);
 575         if (i < 0) {
 576             BIO_printf(bio_err, "Request self-signature verification error\n");
 577             ERR_print_errors(bio_err);
 578             goto end;
 579         }
 580         if (i == 0) {
 581             BIO_printf(bio_err,
 582                        "Request self-signature did not match the certificate request\n");
 583             goto end;
 584         } else {
 585             BIO_printf(bio_err, "Request self-signature ok\n");
 586         }
 587
 588         print_name(bio_err, "subject=", X509_REQ_get_subject_name(req),
 589                    get_nameopt());
 590     }
 591
 592     if (reqfile || newcert) {
 593         X509_NAME *n;
 594
 595         if (!sign_flag && CAkeyfile == NULL) {
 596             BIO_printf(bio_err,
 597                        "We need a private key to sign with, use -signkey or -CAkey or -CA <file> with private key\n");
 598             goto end;
 599         }
 600         if ((x = X509_new()) == NULL)
 601             goto end;
 602
 603         if (sno == NULL) {
 604             sno = ASN1_INTEGER_new();
 605             if (sno == NULL || !rand_serial(NULL, sno))
 606                 goto end;
 607             if (!X509_set_serialNumber(x, sno))
 608                 goto end;
 609             ASN1_INTEGER_free(sno);
 610             sno = NULL;
 611         } else if (!X509_set_serialNumber(x, sno)) {
 612             goto end;
 613         }
 614
 615         n = req == NULL ? fsubj : X509_REQ_get_subject_name(req);
 616         if (!X509_set_issuer_name(x, n) || !X509_set_subject_name(x, n))
 617             goto end;
 618         if (!set_cert_times(x, NULL, NULL, days))
 619             goto end;
 620
 621         if (!X509_set_pubkey(x, fkey != NULL ? fkey : X509_REQ_get0_pubkey(req)))
 622             goto end;
 623     } else {
 624         x = load_cert(infile, informat, "Certificate");
 625         if (x == NULL)
 626             goto end;
 627         if (fkey != NULL && !X509_set_pubkey(x, fkey))
 628             goto end;
 629         if (fsubj != NULL && !X509_set_subject_name(x, fsubj))
 630             goto end;
 631     }
 632
 633     if (CA_flag) {
 634         xca = load_cert(CAfile, CAformat, "CA Certificate");
 635         if (xca == NULL)
 636             goto end;
 637     }
 638
 639     out = bio_open_default(outfile, 'w', outformat);
 640     if (out == NULL)
 641         goto end;
 642
 643     if (!noout || text || next_serial)
 644         OBJ_create("2.99999.3", "SET.ex3", "SET x509v3 extension 3");
 645
 646     if (alias)
 647         X509_alias_set1(x, (unsigned char *)alias, -1);
 648
 649     if (clrtrust)
 650         X509_trust_clear(x);
 651     if (clrreject)
 652         X509_reject_clear(x);
 653
 654     if (trust != NULL) {
 655         for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++) {
 656             objtmp = sk_ASN1_OBJECT_value(trust, i);
 657             X509_add1_trust_object(x, objtmp);
 658         }
 659         objtmp = NULL;
 660     }
 661
 662     if (reject != NULL) {
 663         for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++) {
 664             objtmp = sk_ASN1_OBJECT_value(reject, i);
 665             X509_add1_reject_object(x, objtmp);
 666         }
 667         objtmp = NULL;
 668     }
 669
 670     if (badsig) {
 671         const ASN1_BIT_STRING *signature;
 672
 673         X509_get0_signature(&signature, NULL, x);
 674         corrupt_signature(signature);
 675     }
 676
 677     if (num) {
 678         for (i = 1; i <= num; i++) {
 679             if (issuer == i) {
 680                 print_name(out, "issuer=", X509_get_issuer_name(x), get_nameopt());
 681             } else if (subject == i) {
 682                 print_name(out, "subject=",
 683                            X509_get_subject_name(x), get_nameopt());
 684             } else if (serial == i) {
 685                 BIO_printf(out, "serial=");
 686                 i2a_ASN1_INTEGER(out, X509_get_serialNumber(x));
 687                 BIO_printf(out, "\n");
 688             } else if (next_serial == i) {
 689                 ASN1_INTEGER *ser = X509_get_serialNumber(x);
 690                 BIGNUM *bnser = ASN1_INTEGER_to_BN(ser, NULL);
 691
 692                 if (!bnser)
 693                     goto end;
 694                 if (!BN_add_word(bnser, 1))
 695                     goto end;
 696                 ser = BN_to_ASN1_INTEGER(bnser, NULL);
 697                 if (!ser)
 698                     goto end;
 699                 BN_free(bnser);
 700                 i2a_ASN1_INTEGER(out, ser);
 701                 ASN1_INTEGER_free(ser);
 702                 BIO_puts(out, "\n");
 703             } else if (email == i || ocsp_uri == i) {
 704                 int j;
 705                 STACK_OF(OPENSSL_STRING) *emlst;
 706                 if (email == i)
 707                     emlst = X509_get1_email(x);
 708                 else
 709                     emlst = X509_get1_ocsp(x);
 710                 for (j = 0; j < sk_OPENSSL_STRING_num(emlst); j++)
 711                     BIO_printf(out, "%s\n",
 712                                sk_OPENSSL_STRING_value(emlst, j));
 713                 X509_email_free(emlst);
 714             } else if (aliasout == i) {
 715                 unsigned char *alstr;
 716                 alstr = X509_alias_get0(x, NULL);
 717                 if (alstr)
 718                     BIO_printf(out, "%s\n", alstr);
 719                 else
 720                     BIO_puts(out, "<No Alias>\n");
 721             } else if (subject_hash == i) {
 722                 BIO_printf(out, "%08lx\n", X509_subject_name_hash(x));
 723             }
 724 #ifndef OPENSSL_NO_MD5
 725             else if (subject_hash_old == i) {
 726                 BIO_printf(out, "%08lx\n", X509_subject_name_hash_old(x));
 727             }
 728 #endif
 729             else if (issuer_hash == i) {
 730                 BIO_printf(out, "%08lx\n", X509_issuer_name_hash(x));
 731             }
 732 #ifndef OPENSSL_NO_MD5
 733             else if (issuer_hash_old == i) {
 734                 BIO_printf(out, "%08lx\n", X509_issuer_name_hash_old(x));
 735             }
 736 #endif
 737             else if (pprint == i) {
 738                 X509_PURPOSE *ptmp;
 739                 int j;
 740                 BIO_printf(out, "Certificate purposes:\n");
 741                 for (j = 0; j < X509_PURPOSE_get_count(); j++) {
 742                     ptmp = X509_PURPOSE_get0(j);
 743                     purpose_print(out, x, ptmp);
 744                 }
 745             } else if (modulus == i) {
 746                 EVP_PKEY *pkey;
 747
 748                 pkey = X509_get0_pubkey(x);
 749                 if (pkey == NULL) {
 750                     BIO_printf(bio_err, "Modulus=unavailable\n");
 751                     ERR_print_errors(bio_err);
 752                     goto end;
 753                 }
 754                 BIO_printf(out, "Modulus=");
 755 #ifndef OPENSSL_NO_RSA
 756                 if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
 757                     const BIGNUM *n;
 758                     RSA_get0_key(EVP_PKEY_get0_RSA(pkey), &n, NULL, NULL);
 759                     BN_print(out, n);
 760                 } else
 761 #endif
 762 #ifndef OPENSSL_NO_DSA
 763                 if (EVP_PKEY_id(pkey) == EVP_PKEY_DSA) {
 764                     const BIGNUM *dsapub = NULL;
 765                     DSA_get0_key(EVP_PKEY_get0_DSA(pkey), &dsapub, NULL);
 766                     BN_print(out, dsapub);
 767                 } else
 768 #endif
 769                 {
 770                     BIO_printf(out, "Wrong Algorithm type");
 771                 }
 772                 BIO_printf(out, "\n");
 773             } else if (pubkey == i) {
 774                 EVP_PKEY *pkey;
 775
 776                 pkey = X509_get0_pubkey(x);
 777                 if (pkey == NULL) {
 778                     BIO_printf(bio_err, "Error getting public key\n");
 779                     ERR_print_errors(bio_err);
 780                     goto end;
 781                 }
 782                 PEM_write_bio_PUBKEY(out, pkey);
 783             } else if (C == i) {
 784                 unsigned char *d;
 785                 char *m;
 786                 int len;
 787
 788                 print_name(out, "/*\n"
 789                                 " * Subject: ", X509_get_subject_name(x), get_nameopt());
 790                 print_name(out, " * Issuer:  ", X509_get_issuer_name(x), get_nameopt());
 791                 BIO_puts(out, " */\n");
 792
 793                 len = i2d_X509(x, NULL);
 794                 m = app_malloc(len, "x509 name buffer");
 795                 d = (unsigned char *)m;
 796                 len = i2d_X509_NAME(X509_get_subject_name(x), &d);
 797                 print_array(out, "the_subject_name", len, (unsigned char *)m);
 798                 d = (unsigned char *)m;
 799                 len = i2d_X509_PUBKEY(X509_get_X509_PUBKEY(x), &d);
 800                 print_array(out, "the_public_key", len, (unsigned char *)m);
 801                 d = (unsigned char *)m;
 802                 len = i2d_X509(x, &d);
 803                 print_array(out, "the_certificate", len, (unsigned char *)m);
 804                 OPENSSL_free(m);
 805             } else if (text == i) {
 806                 X509_print_ex(out, x, get_nameopt(), certflag);
 807             } else if (startdate == i) {
 808                 BIO_puts(out, "notBefore=");
 809                 ASN1_TIME_print(out, X509_get0_notBefore(x));
 810                 BIO_puts(out, "\n");
 811             } else if (enddate == i) {
 812                 BIO_puts(out, "notAfter=");
 813                 ASN1_TIME_print(out, X509_get0_notAfter(x));
 814                 BIO_puts(out, "\n");
 815             } else if (fingerprint == i) {
 816                 int j;
 817                 unsigned int n;
 818                 unsigned char md[EVP_MAX_MD_SIZE];
 819                 const EVP_MD *fdig = digest;
 820
 821                 if (fdig == NULL)
 822                     fdig = EVP_sha1();
 823
 824                 if (!X509_digest(x, fdig, md, &n)) {
 825                     BIO_printf(bio_err, "out of memory\n");
 826                     goto end;
 827                 }
 828                 BIO_printf(out, "%s Fingerprint=",
 829                            OBJ_nid2sn(EVP_MD_type(fdig)));
 830                 for (j = 0; j < (int)n; j++) {
 831                     BIO_printf(out, "%02X%c", md[j], (j + 1 == (int)n)
 832                                ? '\n' : ':');
 833                 }
 834             }
 835
 836             /* should be in the library */
 837             else if (sign_flag == i && x509req == 0) {
 838                 BIO_printf(bio_err, "Getting Private key\n");
 839                 if (Upkey == NULL) {
 840                     Upkey = load_key(keyfile, keyformat, 0,
 841                                      passin, e, "Private key");
 842                     if (Upkey == NULL)
 843                         goto end;
 844                 }
 845
 846                 if (!sign(x, Upkey, fkey, days, clrext, digest, extconf,
 847                           extsect, preserve_dates))
 848                     goto end;
 849             } else if (CA_flag == i) {
 850                 BIO_printf(bio_err, "Getting CA Private Key\n");
 851                 if (CAkeyfile != NULL) {
 852                     CApkey = load_key(CAkeyfile, CAkeyformat,
 853                                       0, passin, e, "CA Private Key");
 854                     if (CApkey == NULL)
 855                         goto end;
 856                 }
 857
 858                 if (!x509_certify(ctx, CAfile, digest, x, xca,
 859                                   CApkey, sigopts,
 860                                   CAserial, CA_createserial, days, clrext,
 861                                   extconf, extsect, sno, reqfile, preserve_dates))
 862                     goto end;
 863             } else if (x509req == i) {
 864                 EVP_PKEY *pk;
 865
 866                 BIO_printf(bio_err, "Getting request Private Key\n");
 867                 if (keyfile == NULL) {
 868                     BIO_printf(bio_err, "no request key file specified\n");
 869                     goto end;
 870                 } else {
 871                     pk = load_key(keyfile, keyformat, 0,
 872                                   passin, e, "request key");
 873                     if (pk == NULL)
 874                         goto end;
 875                 }
 876
 877                 BIO_printf(bio_err, "Generating certificate request\n");
 878
 879                 rq = X509_to_X509_REQ(x, pk, digest);
 880                 EVP_PKEY_free(pk);
 881                 if (rq == NULL) {
 882                     ERR_print_errors(bio_err);
 883                     goto end;
 884                 }
 885                 if (!noout) {
 886                     X509_REQ_print_ex(out, rq, get_nameopt(), X509_FLAG_COMPAT);
 887                     PEM_write_bio_X509_REQ(out, rq);
 888                 }
 889                 noout = 1;
 890             } else if (ocspid == i) {
 891                 X509_ocspid_print(out, x);
 892             } else if (ext == i) {
 893                 print_x509v3_exts(out, x, exts);
 894             }
 895         }
 896     }
 897
 898     if (checkend) {
 899         time_t tcheck = time(NULL) + checkoffset;
 900
 901         if (X509_cmp_time(X509_get0_notAfter(x), &tcheck) < 0) {
 902             BIO_printf(out, "Certificate will expire\n");
 903             ret = 1;
 904         } else {
 905             BIO_printf(out, "Certificate will not expire\n");
 906             ret = 0;
 907         }
 908         goto end;
 909     }
 910
 911     print_cert_checks(out, x, checkhost, checkemail, checkip);
 912
 913     if (noout || nocert) {
 914         ret = 0;
 915         goto end;
 916     }
 917
 918     if (outformat == FORMAT_ASN1) {
 919         i = i2d_X509_bio(out, x);
 920     } else if (outformat == FORMAT_PEM) {
 921         if (trustout)
 922             i = PEM_write_bio_X509_AUX(out, x);
 923         else
 924             i = PEM_write_bio_X509(out, x);
 925     } else {
 926         BIO_printf(bio_err, "bad output format specified for outfile\n");
 927         goto end;
 928     }
 929     if (!i) {
 930         BIO_printf(bio_err, "unable to write certificate\n");
 931         ERR_print_errors(bio_err);
 932         goto end;
 933     }
 934     ret = 0;
 935  end:
 936     NCONF_free(extconf);
 937     BIO_free_all(out);
 938     X509_STORE_free(ctx);
 939     X509_NAME_free(fsubj);
 940     X509_REQ_free(req);
 941     X509_free(x);
 942     X509_free(xca);
 943     EVP_PKEY_free(Upkey);
 944     EVP_PKEY_free(CApkey);
 945     EVP_PKEY_free(fkey);
 946     sk_OPENSSL_STRING_free(sigopts);
 947     X509_REQ_free(rq);
 948     ASN1_INTEGER_free(sno);
 949     sk_ASN1_OBJECT_pop_free(trust, ASN1_OBJECT_free);
 950     sk_ASN1_OBJECT_pop_free(reject, ASN1_OBJECT_free);
 951     ASN1_OBJECT_free(objtmp);
 952     release_engine(e);
 953     OPENSSL_free(passin);
 954     return ret;
 955 }
 956
 957 static ASN1_INTEGER *x509_load_serial(const char *CAfile,
 958                                       const char *serialfile, int create)
 959 {
 960     char *buf = NULL;
 961     ASN1_INTEGER *bs = NULL;
 962     BIGNUM *serial = NULL;
 963
 964     if (serialfile == NULL) {
 965         const char *p = strrchr(CAfile, '.');
 966         size_t len = p != NULL ? (size_t)(p - CAfile) : strlen(CAfile);
 967
 968         buf = app_malloc(len + sizeof(POSTFIX), "serial# buffer");
 969         memcpy(buf, CAfile, len);
 970         memcpy(buf + len, POSTFIX, sizeof(POSTFIX));
 971         serialfile = buf;
 972     }
 973
 974     serial = load_serial(serialfile, create, NULL);
 975     if (serial == NULL)
 976         goto end;
 977
 978     if (!BN_add_word(serial, 1)) {
 979         BIO_printf(bio_err, "add_word failure\n");
 980         goto end;
 981     }
 982
 983     if (!save_serial(serialfile, NULL, serial, &bs))
 984         goto end;
 985
 986  end:
 987     OPENSSL_free(buf);
 988     BN_free(serial);
 989     return bs;
 990 }
 991
 992 static int x509_certify(X509_STORE *ctx, const char *CAfile, const EVP_MD *digest,
 993                         X509 *x, X509 *xca, EVP_PKEY *pkey,
 994                         STACK_OF(OPENSSL_STRING) *sigopts,
 995                         const char *serialfile, int create,
 996                         int days, int clrext, CONF *conf, const char *section,
 997                         ASN1_INTEGER *sno, int reqfile, int preserve_dates)
 998 {
 999     int ret = 0;
1000     ASN1_INTEGER *bs = NULL;
1001     X509_STORE_CTX *xsc = NULL;
1002     EVP_PKEY *upkey;
1003
1004     upkey = X509_get0_pubkey(xca);
1005     if (upkey == NULL) {
1006         BIO_printf(bio_err, "Error obtaining CA X509 public key\n");
1007         goto end;
1008     }
1009     EVP_PKEY_copy_parameters(upkey, pkey);
1010
1011     xsc = X509_STORE_CTX_new();
1012     if (xsc == NULL || !X509_STORE_CTX_init(xsc, ctx, x, NULL)) {
1013         BIO_printf(bio_err, "Error initialising X509 store\n");
1014         goto end;
1015     }
1016     if (sno)
1017         bs = sno;
1018     else if ((bs = x509_load_serial(CAfile, serialfile, create)) == NULL)
1019         goto end;
1020
1021     /*
1022      * NOTE: this certificate can/should be self signed, unless it was a
1023      * certificate request in which case it is not.
1024      */
1025     X509_STORE_CTX_set_cert(xsc, x);
1026     X509_STORE_CTX_set_flags(xsc, X509_V_FLAG_CHECK_SS_SIGNATURE);
1027     if (!reqfile && X509_verify_cert(xsc) <= 0)
1028         goto end;
1029
1030     if (!X509_check_private_key(xca, pkey)) {
1031         BIO_printf(bio_err,
1032                    "CA certificate and CA private key do not match\n");
1033         goto end;
1034     }
1035
1036     if (!X509_set_issuer_name(x, X509_get_subject_name(xca)))
1037         goto end;
1038     if (!X509_set_serialNumber(x, bs))
1039         goto end;
1040
1041     if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
1042         goto end;
1043
1044     if (clrext) {
1045         while (X509_get_ext_count(x) > 0)
1046             X509_delete_ext(x, 0);
1047     }
1048
1049     if (conf != NULL) {
1050         X509V3_CTX ctx2;
1051         X509_set_version(x, 2); /* version 3 certificate */
1052         X509V3_set_ctx(&ctx2, xca, x, NULL, NULL, 0);
1053         X509V3_set_nconf(&ctx2, conf);
1054         if (!X509V3_EXT_add_nconf(conf, &ctx2, section, x))
1055             goto end;
1056     }
1057
1058     if (!do_X509_sign(x, pkey, digest, sigopts))
1059         goto end;
1060     ret = 1;
1061  end:
1062     X509_STORE_CTX_free(xsc);
1063     if (!ret)
1064         ERR_print_errors(bio_err);
1065     if (!sno)
1066         ASN1_INTEGER_free(bs);
1067     return ret;
1068 }
1069
1070 static int callb(int ok, X509_STORE_CTX *ctx)
1071 {
1072     int err;
1073     X509 *err_cert;
1074
1075     /*
1076      * it is ok to use a self signed certificate This case will catch both
1077      * the initial ok == 0 and the final ok == 1 calls to this function
1078      */
1079     err = X509_STORE_CTX_get_error(ctx);
1080     if (err == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
1081         return 1;
1082
1083     /*
1084      * BAD we should have gotten an error.  Normally if everything worked
1085      * X509_STORE_CTX_get_error(ctx) will still be set to
1086      * DEPTH_ZERO_SELF_....
1087      */
1088     if (ok) {
1089         BIO_printf(bio_err,
1090                    "error with certificate to be certified - should be self signed\n");
1091         return 0;
1092     } else {
1093         err_cert = X509_STORE_CTX_get_current_cert(ctx);
1094         print_name(bio_err, NULL, X509_get_subject_name(err_cert), 0);
1095         BIO_printf(bio_err,
1096                    "error with certificate - error %d at depth %d\n%s\n", err,
1097                    X509_STORE_CTX_get_error_depth(ctx),
1098                    X509_verify_cert_error_string(err));
1099         return 1;
1100     }
1101 }
1102
1103 /* self-issue; self-sign unless a forced public key (fkey) is given */
1104 static int sign(X509 *x, EVP_PKEY *pkey, EVP_PKEY *fkey, int days, int clrext,
1105                 const EVP_MD *digest, CONF *conf, const char *section,
1106                 int preserve_dates)
1107 {
1108
1109     if (!X509_set_issuer_name(x, X509_get_subject_name(x)))
1110         goto err;
1111     if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
1112         goto err;
1113     if (fkey == NULL && !X509_set_pubkey(x, pkey))
1114         goto err;
1115     if (clrext) {
1116         while (X509_get_ext_count(x) > 0)
1117             X509_delete_ext(x, 0);
1118     }
1119     if (conf != NULL) {
1120         X509V3_CTX ctx;
1121         X509_set_version(x, 2); /* version 3 certificate */
1122         X509V3_set_ctx(&ctx, x, x, NULL, NULL, 0);
1123         X509V3_set_nconf(&ctx, conf);
1124         if (!X509V3_EXT_add_nconf(conf, &ctx, section, x))
1125             goto err;
1126     }
1127     if (!X509_sign(x, pkey, digest))
1128         goto err;
1129     return 1;
1130  err:
1131     ERR_print_errors(bio_err);
1132     return 0;
1133 }
1134
1135 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt)
1136 {
1137     int id, i, idret;
1138     const char *pname;
1139     id = X509_PURPOSE_get_id(pt);
1140     pname = X509_PURPOSE_get0_name(pt);
1141     for (i = 0; i < 2; i++) {
1142         idret = X509_check_purpose(cert, id, i);
1143         BIO_printf(bio, "%s%s : ", pname, i ? " CA" : "");
1144         if (idret == 1)
1145             BIO_printf(bio, "Yes\n");
1146         else if (idret == 0)
1147             BIO_printf(bio, "No\n");
1148         else
1149             BIO_printf(bio, "Yes (WARNING code=%d)\n", idret);
1150     }
1151     return 1;
1152 }
1153
1154 static int parse_ext_names(char *names, const char **result)
1155 {
1156     char *p, *q;
1157     int cnt = 0, len = 0;
1158
1159     p = q = names;
1160     len = strlen(names);
1161
1162     while (q - names <= len) {
1163         if (*q != ',' && *q != '\0') {
1164             q++;
1165             continue;
1166         }
1167         if (p != q) {
1168             /* found */
1169             if (result != NULL) {
1170                 result[cnt] = p;
1171                 *q = '\0';
1172             }
1173             cnt++;
1174         }
1175         p = ++q;
1176     }
1177
1178     return cnt;
1179 }
1180
1181 static int print_x509v3_exts(BIO *bio, X509 *x, const char *ext_names)
1182 {
1183     const STACK_OF(X509_EXTENSION) *exts = NULL;
1184     STACK_OF(X509_EXTENSION) *exts2 = NULL;
1185     X509_EXTENSION *ext = NULL;
1186     ASN1_OBJECT *obj;
1187     int i, j, ret = 0, num, nn = 0;
1188     const char *sn, **names = NULL;
1189     char *tmp_ext_names = NULL;
1190
1191     exts = X509_get0_extensions(x);
1192     if ((num = sk_X509_EXTENSION_num(exts)) <= 0) {
1193         BIO_printf(bio, "No extensions in certificate\n");
1194         ret = 1;
1195         goto end;
1196     }
1197
1198     /* parse comma separated ext name string */
1199     if ((tmp_ext_names = OPENSSL_strdup(ext_names)) == NULL)
1200         goto end;
1201     if ((nn = parse_ext_names(tmp_ext_names, NULL)) == 0) {
1202         BIO_printf(bio, "Invalid extension names: %s\n", ext_names);
1203         goto end;
1204     }
1205     if ((names = OPENSSL_malloc(sizeof(char *) * nn)) == NULL)
1206         goto end;
1207     parse_ext_names(tmp_ext_names, names);
1208
1209     for (i = 0; i < num; i++) {
1210         ext = sk_X509_EXTENSION_value(exts, i);
1211
1212         /* check if this ext is what we want */
1213         obj = X509_EXTENSION_get_object(ext);
1214         sn = OBJ_nid2sn(OBJ_obj2nid(obj));
1215         if (sn == NULL || strcmp(sn, "UNDEF") == 0)
1216             continue;
1217
1218         for (j = 0; j < nn; j++) {
1219             if (strcmp(sn, names[j]) == 0) {
1220                 /* push the extension into a new stack */
1221                 if (exts2 == NULL
1222                     && (exts2 = sk_X509_EXTENSION_new_null()) == NULL)
1223                     goto end;
1224                 if (!sk_X509_EXTENSION_push(exts2, ext))
1225                     goto end;
1226             }
1227         }
1228     }
1229
1230     if (!sk_X509_EXTENSION_num(exts2)) {
1231         BIO_printf(bio, "No extensions matched with %s\n", ext_names);
1232         ret = 1;
1233         goto end;
1234     }
1235
1236     ret = X509V3_extensions_print(bio, NULL, exts2, 0, 0);
1237  end:
1238     sk_X509_EXTENSION_free(exts2);
1239     OPENSSL_free(names);
1240     OPENSSL_free(tmp_ext_names);
1241     return ret;
1242 }