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,
  37                 STACK_OF(OPENSSL_STRING) *sigopts,
  38                 int days, int clrext,
  39                 const EVP_MD *digest, CONF *conf, const char *section,
  40                 int preserve_dates);
  41 static int x509_certify(X509_STORE *ctx, const char *CAfile, const EVP_MD *digest,
  42                         X509 *x, X509 *xca, EVP_PKEY *pkey,
  43                         STACK_OF(OPENSSL_STRING) *sigopts, const char *serialfile,
  44                         int create, int days, int clrext, CONF *conf,
  45                         const char *section, ASN1_INTEGER *sno, int reqfile,
  46                         int preserve_dates);
  47 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt);
  48 static int print_x509v3_exts(BIO *bio, X509 *x, const char *exts);
  49
  50 typedef enum OPTION_choice {
  51     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  52     OPT_INFORM, OPT_OUTFORM, OPT_KEYFORM, OPT_REQ, OPT_CAFORM,
  53     OPT_CAKEYFORM, OPT_VFYOPT, OPT_SIGOPT, OPT_DAYS, OPT_PASSIN, OPT_EXTFILE,
  54     OPT_EXTENSIONS, OPT_IN, OPT_OUT, OPT_SIGNKEY, OPT_CA, OPT_CAKEY,
  55     OPT_CASERIAL, OPT_SET_SERIAL, OPT_NEW, OPT_FORCE_PUBKEY, OPT_SUBJ,
  56     OPT_ADDTRUST, OPT_ADDREJECT, OPT_SETALIAS, OPT_CERTOPT, OPT_NAMEOPT,
  57     OPT_C, OPT_EMAIL, OPT_OCSP_URI, OPT_SERIAL, OPT_NEXT_SERIAL,
  58     OPT_MODULUS, OPT_PUBKEY, OPT_X509TOREQ, OPT_TEXT, OPT_HASH,
  59     OPT_ISSUER_HASH, OPT_SUBJECT, OPT_ISSUER, OPT_FINGERPRINT, OPT_DATES,
  60     OPT_PURPOSE, OPT_STARTDATE, OPT_ENDDATE, OPT_CHECKEND, OPT_CHECKHOST,
  61     OPT_CHECKEMAIL, OPT_CHECKIP, OPT_NOOUT, OPT_TRUSTOUT, OPT_CLRTRUST,
  62     OPT_CLRREJECT, OPT_ALIAS, OPT_CACREATESERIAL, OPT_CLREXT, OPT_OCSPID,
  63     OPT_SUBJECT_HASH_OLD,
  64     OPT_ISSUER_HASH_OLD,
  65     OPT_BADSIG, OPT_MD, OPT_ENGINE, OPT_NOCERT, OPT_PRESERVE_DATES,
  66     OPT_R_ENUM, OPT_PROV_ENUM, OPT_EXT
  67 } OPTION_CHOICE;
  68
  69 const OPTIONS x509_options[] = {
  70     OPT_SECTION("General"),
  71     {"help", OPT_HELP, '-', "Display this summary"},
  72 #ifndef OPENSSL_NO_ENGINE
  73     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  74 #endif
  75
  76     {"inform", OPT_INFORM, 'f',
  77      "Input format - default PEM (one of DER or PEM)"},
  78     {"in", OPT_IN, '<', "Input file - default stdin"},
  79     {"passin", OPT_PASSIN, 's', "Private key password/pass-phrase source"},
  80     {"outform", OPT_OUTFORM, 'f',
  81      "Output format - default PEM (one of DER or PEM)"},
  82     {"out", OPT_OUT, '>', "Output file - default stdout"},
  83     {"keyform", OPT_KEYFORM, 'E', "Private key format - default PEM"},
  84     {"req", OPT_REQ, '-', "Input is a certificate request, sign and output"},
  85     {"vfyopt", OPT_VFYOPT, 's', "Verification parameter in n:v form"},
  86
  87     OPT_SECTION("Output"),
  88     {"serial", OPT_SERIAL, '-', "Print serial number value"},
  89     {"subject_hash", OPT_HASH, '-', "Print subject hash value"},
  90     {"issuer_hash", OPT_ISSUER_HASH, '-', "Print issuer hash value"},
  91     {"hash", OPT_HASH, '-', "Synonym for -subject_hash"},
  92     {"subject", OPT_SUBJECT, '-', "Print subject DN"},
  93     {"issuer", OPT_ISSUER, '-', "Print issuer DN"},
  94     {"email", OPT_EMAIL, '-', "Print email address(es)"},
  95     {"purpose", OPT_PURPOSE, '-', "Print out certificate purposes"},
  96     {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
  97     {"pubkey", OPT_PUBKEY, '-', "Output the public key"},
  98     {"fingerprint", OPT_FINGERPRINT, '-', "Print the certificate fingerprint"},
  99     {"alias", OPT_ALIAS, '-', "Output certificate alias"},
 100     {"noout", OPT_NOOUT, '-', "No output, just status"},
 101     {"ocspid", OPT_OCSPID, '-',
 102      "Print OCSP hash values for the subject name and public key"},
 103     {"ocsp_uri", OPT_OCSP_URI, '-', "Print OCSP Responder URL(s)"},
 104     {"nocert", OPT_NOCERT, '-', "No certificate output"},
 105     {"trustout", OPT_TRUSTOUT, '-', "Output a trusted certificate"},
 106     {"x509toreq", OPT_X509TOREQ, '-',
 107      "Output a certification request object"},
 108     {"checkend", OPT_CHECKEND, 'M',
 109      "Check whether the cert expires in the next arg seconds"},
 110     {OPT_MORE_STR, 1, 1, "Exit 1 if so, 0 if not"},
 111     {"text", OPT_TEXT, '-', "Print the certificate in text form"},
 112     {"ext", OPT_EXT, 's', "Print various X509V3 extensions"},
 113     {"C", OPT_C, '-', "Print out C code forms"},
 114 #ifndef OPENSSL_NO_MD5
 115     {"subject_hash_old", OPT_SUBJECT_HASH_OLD, '-',
 116      "Print old-style (MD5) issuer hash value"},
 117     {"issuer_hash_old", OPT_ISSUER_HASH_OLD, '-',
 118      "Print old-style (MD5) subject hash value"},
 119 #endif
 120     {"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"},
 121
 122     OPT_SECTION("Certificate"),
 123     {"startdate", OPT_STARTDATE, '-', "Set notBefore field"},
 124     {"enddate", OPT_ENDDATE, '-', "Set notAfter field"},
 125     {"dates", OPT_DATES, '-', "Both Before and After dates"},
 126     {"clrtrust", OPT_CLRTRUST, '-', "Clear all trusted purposes"},
 127     {"clrext", OPT_CLREXT, '-', "Clear all certificate extensions"},
 128     {"addtrust", OPT_ADDTRUST, 's', "Trust certificate for a given purpose"},
 129     {"addreject", OPT_ADDREJECT, 's',
 130      "Reject certificate for a given purpose"},
 131     {"setalias", OPT_SETALIAS, 's', "Set certificate alias"},
 132     {"days", OPT_DAYS, 'n',
 133      "How long till expiry of a signed certificate - def 30 days"},
 134     {"signkey", OPT_SIGNKEY, 's', "Self sign cert with arg"},
 135     {"set_serial", OPT_SET_SERIAL, 's', "Serial number to use"},
 136     {"extensions", OPT_EXTENSIONS, 's', "Section from config file to use"},
 137     {"certopt", OPT_CERTOPT, 's', "Various certificate text options"},
 138     {"checkhost", OPT_CHECKHOST, 's', "Check certificate matches host"},
 139     {"checkemail", OPT_CHECKEMAIL, 's', "Check certificate matches email"},
 140     {"checkip", OPT_CHECKIP, 's', "Check certificate matches ipaddr"},
 141     {"force_pubkey", OPT_FORCE_PUBKEY, '<', "Force the key to put inside certificate"},
 142     {"subj", OPT_SUBJ, 's', "Set or override certificate subject (and issuer)"},
 143
 144     OPT_SECTION("CA"),
 145     {"CA", OPT_CA, '<', "Set the CA certificate, must be PEM format"},
 146     {"CAkey", OPT_CAKEY, 's',
 147      "The CA key, must be PEM format; if not in CAfile"},
 148     {"extfile", OPT_EXTFILE, '<', "File with X509V3 extensions to add"},
 149     OPT_R_OPTIONS,
 150     OPT_PROV_OPTIONS,
 151     {"CAform", OPT_CAFORM, 'F', "CA format - default PEM"},
 152     {"CAkeyform", OPT_CAKEYFORM, 'E', "CA key format - default PEM"},
 153     {"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
 154     {"CAcreateserial", OPT_CACREATESERIAL, '-',
 155      "Create serial number file if it does not exist"},
 156     {"CAserial", OPT_CASERIAL, 's', "Serial file"},
 157     {"new", OPT_NEW, '-', "Generate a certificate from scratch"},
 158     {"next_serial", OPT_NEXT_SERIAL, '-', "Increment current certificate serial number"},
 159     {"clrreject", OPT_CLRREJECT, '-',
 160      "Clears all the prohibited or rejected uses of the certificate"},
 161     {"badsig", OPT_BADSIG, '-', "Corrupt last byte of certificate signature (for test)"},
 162     {"", OPT_MD, '-', "Any supported digest"},
 163     {"preserve_dates", OPT_PRESERVE_DATES, '-', "preserve existing dates when signing"},
 164     {NULL}
 165 };
 166
 167 int x509_main(int argc, char **argv)
 168 {
 169     ASN1_INTEGER *sno = NULL;
 170     ASN1_OBJECT *objtmp = NULL;
 171     BIO *out = NULL;
 172     CONF *extconf = NULL;
 173     EVP_PKEY *Upkey = NULL, *CApkey = NULL, *fkey = NULL;
 174     int newcert = 0;
 175     char *subj = NULL;
 176     X509_NAME *fsubj = NULL;
 177     const unsigned long chtype = MBSTRING_ASC;
 178     const int multirdn = 0;
 179     STACK_OF(ASN1_OBJECT) *trust = NULL, *reject = NULL;
 180     STACK_OF(OPENSSL_STRING) *sigopts = NULL, *vfyopts = NULL;
 181     X509 *x = NULL, *xca = NULL;
 182     X509_REQ *req = NULL, *rq = NULL;
 183     X509_STORE *ctx = NULL;
 184     const EVP_MD *digest = NULL;
 185     char *CAkeyfile = NULL, *CAserial = NULL, *fkeyfile = NULL, *alias = NULL;
 186     char *checkhost = NULL, *checkemail = NULL, *checkip = NULL, *exts = NULL;
 187     char *extsect = NULL, *extfile = NULL, *passin = NULL, *passinarg = NULL;
 188     char *infile = NULL, *outfile = NULL, *keyfile = NULL, *CAfile = NULL;
 189     char *prog;
 190     int x509req = 0, days = DEF_DAYS, modulus = 0, pubkey = 0, pprint = 0;
 191     int C = 0, CAformat = FORMAT_PEM, CAkeyformat = FORMAT_PEM;
 192     int fingerprint = 0, reqfile = 0, checkend = 0;
 193     int informat = FORMAT_PEM, outformat = FORMAT_PEM, keyformat = FORMAT_PEM;
 194     int next_serial = 0, subject_hash = 0, issuer_hash = 0, ocspid = 0;
 195     int noout = 0, sign_flag = 0, CA_flag = 0, CA_createserial = 0, email = 0;
 196     int ocsp_uri = 0, trustout = 0, clrtrust = 0, clrreject = 0, aliasout = 0;
 197     int ret = 1, i, num = 0, badsig = 0, clrext = 0, nocert = 0;
 198     int text = 0, serial = 0, subject = 0, issuer = 0, startdate = 0, ext = 0;
 199     int enddate = 0;
 200     time_t checkoffset = 0;
 201     unsigned long certflag = 0;
 202     int preserve_dates = 0;
 203     OPTION_CHOICE o;
 204     ENGINE *e = NULL;
 205 #ifndef OPENSSL_NO_MD5
 206     int subject_hash_old = 0, issuer_hash_old = 0;
 207 #endif
 208
 209     ctx = X509_STORE_new();
 210     if (ctx == NULL)
 211         goto end;
 212     X509_STORE_set_verify_cb(ctx, callb);
 213
 214     prog = opt_init(argc, argv, x509_options);
 215     while ((o = opt_next()) != OPT_EOF) {
 216         switch (o) {
 217         case OPT_EOF:
 218         case OPT_ERR:
 219  opthelp:
 220             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 221             goto end;
 222         case OPT_HELP:
 223             opt_help(x509_options);
 224             ret = 0;
 225             goto end;
 226         case OPT_INFORM:
 227             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 228                 goto opthelp;
 229             break;
 230         case OPT_IN:
 231             infile = opt_arg();
 232             break;
 233         case OPT_OUTFORM:
 234             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 235                 goto opthelp;
 236             break;
 237         case OPT_KEYFORM:
 238             if (!opt_format(opt_arg(), OPT_FMT_PDE, &keyformat))
 239                 goto opthelp;
 240             break;
 241         case OPT_CAFORM:
 242             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &CAformat))
 243                 goto opthelp;
 244             break;
 245         case OPT_CAKEYFORM:
 246             if (!opt_format(opt_arg(), OPT_FMT_PDE, &CAkeyformat))
 247                 goto opthelp;
 248             break;
 249         case OPT_OUT:
 250             outfile = opt_arg();
 251             break;
 252         case OPT_REQ:
 253             reqfile = 1;
 254             break;
 255
 256         case OPT_SIGOPT:
 257             if (!sigopts)
 258                 sigopts = sk_OPENSSL_STRING_new_null();
 259             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 260                 goto opthelp;
 261             break;
 262         case OPT_VFYOPT:
 263             if (!vfyopts)
 264                 vfyopts = sk_OPENSSL_STRING_new_null();
 265             if (!vfyopts || !sk_OPENSSL_STRING_push(vfyopts, opt_arg()))
 266                 goto opthelp;
 267             break;
 268         case OPT_DAYS:
 269             if (preserve_dates)
 270                 goto opthelp;
 271             days = atoi(opt_arg());
 272             break;
 273         case OPT_PASSIN:
 274             passinarg = opt_arg();
 275             break;
 276         case OPT_EXTFILE:
 277             extfile = opt_arg();
 278             break;
 279         case OPT_R_CASES:
 280             if (!opt_rand(o))
 281                 goto end;
 282             break;
 283         case OPT_PROV_CASES:
 284             if (!opt_provider(o))
 285                 goto end;
 286             break;
 287         case OPT_EXTENSIONS:
 288             extsect = opt_arg();
 289             break;
 290         case OPT_SIGNKEY:
 291             keyfile = opt_arg();
 292             sign_flag = ++num;
 293             break;
 294         case OPT_CA:
 295             CAfile = opt_arg();
 296             CA_flag = ++num;
 297             break;
 298         case OPT_CAKEY:
 299             CAkeyfile = opt_arg();
 300             break;
 301         case OPT_CASERIAL:
 302             CAserial = opt_arg();
 303             break;
 304         case OPT_SET_SERIAL:
 305             if (sno != NULL) {
 306                 BIO_printf(bio_err, "Serial number supplied twice\n");
 307                 goto opthelp;
 308             }
 309             if ((sno = s2i_ASN1_INTEGER(NULL, opt_arg())) == NULL)
 310                 goto opthelp;
 311             break;
 312         case OPT_NEW:
 313             newcert = 1;
 314             break;
 315         case OPT_FORCE_PUBKEY:
 316             fkeyfile = opt_arg();
 317             break;
 318         case OPT_SUBJ:
 319             subj = opt_arg();
 320             break;
 321         case OPT_ADDTRUST:
 322             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 323                 BIO_printf(bio_err,
 324                            "%s: Invalid trust object value %s\n",
 325                            prog, opt_arg());
 326                 goto opthelp;
 327             }
 328             if (trust == NULL && (trust = sk_ASN1_OBJECT_new_null()) == NULL)
 329                 goto end;
 330             sk_ASN1_OBJECT_push(trust, objtmp);
 331             objtmp = NULL;
 332             trustout = 1;
 333             break;
 334         case OPT_ADDREJECT:
 335             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 336                 BIO_printf(bio_err,
 337                            "%s: Invalid reject object value %s\n",
 338                            prog, opt_arg());
 339                 goto opthelp;
 340             }
 341             if (reject == NULL
 342                 && (reject = sk_ASN1_OBJECT_new_null()) == NULL)
 343                 goto end;
 344             sk_ASN1_OBJECT_push(reject, objtmp);
 345             objtmp = NULL;
 346             trustout = 1;
 347             break;
 348         case OPT_SETALIAS:
 349             alias = opt_arg();
 350             trustout = 1;
 351             break;
 352         case OPT_CERTOPT:
 353             if (!set_cert_ex(&certflag, opt_arg()))
 354                 goto opthelp;
 355             break;
 356         case OPT_NAMEOPT:
 357             if (!set_nameopt(opt_arg()))
 358                 goto opthelp;
 359             break;
 360         case OPT_ENGINE:
 361             e = setup_engine(opt_arg(), 0);
 362             break;
 363         case OPT_C:
 364             C = ++num;
 365             break;
 366         case OPT_EMAIL:
 367             email = ++num;
 368             break;
 369         case OPT_OCSP_URI:
 370             ocsp_uri = ++num;
 371             break;
 372         case OPT_SERIAL:
 373             serial = ++num;
 374             break;
 375         case OPT_NEXT_SERIAL:
 376             next_serial = ++num;
 377             break;
 378         case OPT_MODULUS:
 379             modulus = ++num;
 380             break;
 381         case OPT_PUBKEY:
 382             pubkey = ++num;
 383             break;
 384         case OPT_X509TOREQ:
 385             x509req = ++num;
 386             break;
 387         case OPT_TEXT:
 388             text = ++num;
 389             break;
 390         case OPT_SUBJECT:
 391             subject = ++num;
 392             break;
 393         case OPT_ISSUER:
 394             issuer = ++num;
 395             break;
 396         case OPT_FINGERPRINT:
 397             fingerprint = ++num;
 398             break;
 399         case OPT_HASH:
 400             subject_hash = ++num;
 401             break;
 402         case OPT_ISSUER_HASH:
 403             issuer_hash = ++num;
 404             break;
 405         case OPT_PURPOSE:
 406             pprint = ++num;
 407             break;
 408         case OPT_STARTDATE:
 409             startdate = ++num;
 410             break;
 411         case OPT_ENDDATE:
 412             enddate = ++num;
 413             break;
 414         case OPT_NOOUT:
 415             noout = ++num;
 416             break;
 417         case OPT_EXT:
 418             ext = ++num;
 419             exts = opt_arg();
 420             break;
 421         case OPT_NOCERT:
 422             nocert = 1;
 423             break;
 424         case OPT_TRUSTOUT:
 425             trustout = 1;
 426             break;
 427         case OPT_CLRTRUST:
 428             clrtrust = ++num;
 429             break;
 430         case OPT_CLRREJECT:
 431             clrreject = ++num;
 432             break;
 433         case OPT_ALIAS:
 434             aliasout = ++num;
 435             break;
 436         case OPT_CACREATESERIAL:
 437             CA_createserial = ++num;
 438             break;
 439         case OPT_CLREXT:
 440             clrext = 1;
 441             break;
 442         case OPT_OCSPID:
 443             ocspid = ++num;
 444             break;
 445         case OPT_BADSIG:
 446             badsig = 1;
 447             break;
 448 #ifndef OPENSSL_NO_MD5
 449         case OPT_SUBJECT_HASH_OLD:
 450             subject_hash_old = ++num;
 451             break;
 452         case OPT_ISSUER_HASH_OLD:
 453             issuer_hash_old = ++num;
 454             break;
 455 #else
 456         case OPT_SUBJECT_HASH_OLD:
 457         case OPT_ISSUER_HASH_OLD:
 458             break;
 459 #endif
 460         case OPT_DATES:
 461             startdate = ++num;
 462             enddate = ++num;
 463             break;
 464         case OPT_CHECKEND:
 465             checkend = 1;
 466             {
 467                 intmax_t temp = 0;
 468                 if (!opt_imax(opt_arg(), &temp))
 469                     goto opthelp;
 470                 checkoffset = (time_t)temp;
 471                 if ((intmax_t)checkoffset != temp) {
 472                     BIO_printf(bio_err, "%s: checkend time out of range %s\n",
 473                                prog, opt_arg());
 474                     goto opthelp;
 475                 }
 476             }
 477             break;
 478         case OPT_CHECKHOST:
 479             checkhost = opt_arg();
 480             break;
 481         case OPT_CHECKEMAIL:
 482             checkemail = opt_arg();
 483             break;
 484         case OPT_CHECKIP:
 485             checkip = opt_arg();
 486             break;
 487         case OPT_PRESERVE_DATES:
 488             if (days != DEF_DAYS)
 489                 goto opthelp;
 490             preserve_dates = 1;
 491             break;
 492         case OPT_MD:
 493             if (!opt_md(opt_unknown(), &digest))
 494                 goto opthelp;
 495         }
 496     }
 497     argc = opt_num_rest();
 498     argv = opt_rest();
 499     if (argc != 0) {
 500         BIO_printf(bio_err, "%s: Unknown parameter %s\n", prog, argv[0]);
 501         goto opthelp;
 502     }
 503
 504     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 505         BIO_printf(bio_err, "Error getting password\n");
 506         goto end;
 507     }
 508
 509     if (!X509_STORE_set_default_paths(ctx)) {
 510         ERR_print_errors(bio_err);
 511         goto end;
 512     }
 513
 514     if (newcert && infile != NULL) {
 515         BIO_printf(bio_err, "The -in option must not be used since -new is set\n");
 516         goto end;
 517     }
 518     if (newcert && fkeyfile == NULL) {
 519         BIO_printf(bio_err,
 520                    "The -new option requires a public key to be set using -force_pubkey\n");
 521         goto end;
 522     }
 523     if (fkeyfile != NULL) {
 524         fkey = load_pubkey(fkeyfile, keyformat, 0, NULL, e, "Forced key");
 525         if (fkey == NULL)
 526             goto end;
 527     }
 528
 529     if (newcert && subj == NULL) {
 530         BIO_printf(bio_err,
 531                    "The -new option requires a subject to be set using -subj\n");
 532         goto end;
 533     }
 534     if (subj != NULL && (fsubj = parse_name(subj, chtype, multirdn)) == NULL)
 535         goto end;
 536
 537     if (CAkeyfile == NULL && CA_flag && CAformat == FORMAT_PEM) {
 538         CAkeyfile = CAfile;
 539     } else if (CA_flag && CAkeyfile == NULL) {
 540         BIO_printf(bio_err,
 541                    "need to specify a CAkey if using the CA command\n");
 542         goto end;
 543     } else if (!CA_flag && CAkeyfile != NULL) {
 544         BIO_printf(bio_err,
 545                    "ignoring -CAkey option since no -CA option is given\n");
 546     }
 547
 548     if (extfile != NULL) {
 549         X509V3_CTX ctx2;
 550         if ((extconf = app_load_config(extfile)) == NULL)
 551             goto end;
 552         if (extsect == NULL) {
 553             extsect = NCONF_get_string(extconf, "default", "extensions");
 554             if (extsect == NULL) {
 555                 ERR_clear_error();
 556                 extsect = "default";
 557             }
 558         }
 559         X509V3_set_ctx_test(&ctx2);
 560         X509V3_set_nconf(&ctx2, extconf);
 561         if (!X509V3_EXT_add_nconf(extconf, &ctx2, extsect, NULL)) {
 562             BIO_printf(bio_err,
 563                        "Error Loading extension section %s\n", extsect);
 564             ERR_print_errors(bio_err);
 565             goto end;
 566         }
 567     }
 568
 569     if (reqfile) {
 570         EVP_PKEY *pkey;
 571         BIO *in;
 572
 573         in = bio_open_default(infile, 'r', informat);
 574         if (in == NULL)
 575             goto end;
 576         req = PEM_read_bio_X509_REQ(in, NULL, NULL, NULL);
 577         BIO_free(in);
 578
 579         if (req == NULL) {
 580             ERR_print_errors(bio_err);
 581             goto end;
 582         }
 583
 584         if ((pkey = X509_REQ_get0_pubkey(req)) == NULL) {
 585             BIO_printf(bio_err, "error unpacking public key\n");
 586             goto end;
 587         }
 588         i = do_X509_REQ_verify(req, pkey, vfyopts);
 589         if (i < 0) {
 590             BIO_printf(bio_err, "Request self-signature verification error\n");
 591             ERR_print_errors(bio_err);
 592             goto end;
 593         }
 594         if (i == 0) {
 595             BIO_printf(bio_err,
 596                        "Request self-signature did not match the certificate request\n");
 597             goto end;
 598         } else {
 599             BIO_printf(bio_err, "Request self-signature ok\n");
 600         }
 601
 602         print_name(bio_err, "subject=", X509_REQ_get_subject_name(req),
 603                    get_nameopt());
 604     }
 605
 606     if (reqfile || newcert) {
 607         X509_NAME *n;
 608
 609         if (!sign_flag && CAkeyfile == NULL) {
 610             BIO_printf(bio_err,
 611                        "We need a private key to sign with, use -signkey or -CAkey or -CA <file> with private key\n");
 612             goto end;
 613         }
 614         if ((x = X509_new()) == NULL)
 615             goto end;
 616
 617         if (sno == NULL) {
 618             sno = ASN1_INTEGER_new();
 619             if (sno == NULL || !rand_serial(NULL, sno))
 620                 goto end;
 621             if (!X509_set_serialNumber(x, sno))
 622                 goto end;
 623             ASN1_INTEGER_free(sno);
 624             sno = NULL;
 625         } else if (!X509_set_serialNumber(x, sno)) {
 626             goto end;
 627         }
 628
 629         n = req == NULL ? fsubj : X509_REQ_get_subject_name(req);
 630         if (!X509_set_issuer_name(x, n) || !X509_set_subject_name(x, n))
 631             goto end;
 632         if (!set_cert_times(x, NULL, NULL, days))
 633             goto end;
 634
 635         if (!X509_set_pubkey(x, fkey != NULL ? fkey : X509_REQ_get0_pubkey(req)))
 636             goto end;
 637     } else {
 638         x = load_cert(infile, informat, "Certificate");
 639         if (x == NULL)
 640             goto end;
 641         if (fkey != NULL && !X509_set_pubkey(x, fkey))
 642             goto end;
 643         if (fsubj != NULL && !X509_set_subject_name(x, fsubj))
 644             goto end;
 645     }
 646
 647     if (CA_flag) {
 648         xca = load_cert(CAfile, CAformat, "CA Certificate");
 649         if (xca == NULL)
 650             goto end;
 651     }
 652
 653     out = bio_open_default(outfile, 'w', outformat);
 654     if (out == NULL)
 655         goto end;
 656
 657     if (!noout || text || next_serial)
 658         OBJ_create("2.99999.3", "SET.ex3", "SET x509v3 extension 3");
 659
 660     if (alias)
 661         X509_alias_set1(x, (unsigned char *)alias, -1);
 662
 663     if (clrtrust)
 664         X509_trust_clear(x);
 665     if (clrreject)
 666         X509_reject_clear(x);
 667
 668     if (trust != NULL) {
 669         for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++) {
 670             objtmp = sk_ASN1_OBJECT_value(trust, i);
 671             X509_add1_trust_object(x, objtmp);
 672         }
 673         objtmp = NULL;
 674     }
 675
 676     if (reject != NULL) {
 677         for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++) {
 678             objtmp = sk_ASN1_OBJECT_value(reject, i);
 679             X509_add1_reject_object(x, objtmp);
 680         }
 681         objtmp = NULL;
 682     }
 683
 684     if (badsig) {
 685         const ASN1_BIT_STRING *signature;
 686
 687         X509_get0_signature(&signature, NULL, x);
 688         corrupt_signature(signature);
 689     }
 690
 691     if (num) {
 692         for (i = 1; i <= num; i++) {
 693             if (issuer == i) {
 694                 print_name(out, "issuer=", X509_get_issuer_name(x), get_nameopt());
 695             } else if (subject == i) {
 696                 print_name(out, "subject=",
 697                            X509_get_subject_name(x), get_nameopt());
 698             } else if (serial == i) {
 699                 BIO_printf(out, "serial=");
 700                 i2a_ASN1_INTEGER(out, X509_get_serialNumber(x));
 701                 BIO_printf(out, "\n");
 702             } else if (next_serial == i) {
 703                 ASN1_INTEGER *ser = X509_get_serialNumber(x);
 704                 BIGNUM *bnser = ASN1_INTEGER_to_BN(ser, NULL);
 705
 706                 if (!bnser)
 707                     goto end;
 708                 if (!BN_add_word(bnser, 1))
 709                     goto end;
 710                 ser = BN_to_ASN1_INTEGER(bnser, NULL);
 711                 if (!ser)
 712                     goto end;
 713                 BN_free(bnser);
 714                 i2a_ASN1_INTEGER(out, ser);
 715                 ASN1_INTEGER_free(ser);
 716                 BIO_puts(out, "\n");
 717             } else if (email == i || ocsp_uri == i) {
 718                 int j;
 719                 STACK_OF(OPENSSL_STRING) *emlst;
 720                 if (email == i)
 721                     emlst = X509_get1_email(x);
 722                 else
 723                     emlst = X509_get1_ocsp(x);
 724                 for (j = 0; j < sk_OPENSSL_STRING_num(emlst); j++)
 725                     BIO_printf(out, "%s\n",
 726                                sk_OPENSSL_STRING_value(emlst, j));
 727                 X509_email_free(emlst);
 728             } else if (aliasout == i) {
 729                 unsigned char *alstr;
 730                 alstr = X509_alias_get0(x, NULL);
 731                 if (alstr)
 732                     BIO_printf(out, "%s\n", alstr);
 733                 else
 734                     BIO_puts(out, "<No Alias>\n");
 735             } else if (subject_hash == i) {
 736                 BIO_printf(out, "%08lx\n", X509_subject_name_hash(x));
 737             }
 738 #ifndef OPENSSL_NO_MD5
 739             else if (subject_hash_old == i) {
 740                 BIO_printf(out, "%08lx\n", X509_subject_name_hash_old(x));
 741             }
 742 #endif
 743             else if (issuer_hash == i) {
 744                 BIO_printf(out, "%08lx\n", X509_issuer_name_hash(x));
 745             }
 746 #ifndef OPENSSL_NO_MD5
 747             else if (issuer_hash_old == i) {
 748                 BIO_printf(out, "%08lx\n", X509_issuer_name_hash_old(x));
 749             }
 750 #endif
 751             else if (pprint == i) {
 752                 X509_PURPOSE *ptmp;
 753                 int j;
 754                 BIO_printf(out, "Certificate purposes:\n");
 755                 for (j = 0; j < X509_PURPOSE_get_count(); j++) {
 756                     ptmp = X509_PURPOSE_get0(j);
 757                     purpose_print(out, x, ptmp);
 758                 }
 759             } else if (modulus == i) {
 760                 EVP_PKEY *pkey;
 761
 762                 pkey = X509_get0_pubkey(x);
 763                 if (pkey == NULL) {
 764                     BIO_printf(bio_err, "Modulus=unavailable\n");
 765                     ERR_print_errors(bio_err);
 766                     goto end;
 767                 }
 768                 BIO_printf(out, "Modulus=");
 769 #ifndef OPENSSL_NO_RSA
 770                 if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
 771                     const BIGNUM *n;
 772                     RSA_get0_key(EVP_PKEY_get0_RSA(pkey), &n, NULL, NULL);
 773                     BN_print(out, n);
 774                 } else
 775 #endif
 776 #ifndef OPENSSL_NO_DSA
 777                 if (EVP_PKEY_id(pkey) == EVP_PKEY_DSA) {
 778                     const BIGNUM *dsapub = NULL;
 779                     DSA_get0_key(EVP_PKEY_get0_DSA(pkey), &dsapub, NULL);
 780                     BN_print(out, dsapub);
 781                 } else
 782 #endif
 783                 {
 784                     BIO_printf(out, "Wrong Algorithm type");
 785                 }
 786                 BIO_printf(out, "\n");
 787             } else if (pubkey == i) {
 788                 EVP_PKEY *pkey;
 789
 790                 pkey = X509_get0_pubkey(x);
 791                 if (pkey == NULL) {
 792                     BIO_printf(bio_err, "Error getting public key\n");
 793                     ERR_print_errors(bio_err);
 794                     goto end;
 795                 }
 796                 PEM_write_bio_PUBKEY(out, pkey);
 797             } else if (C == i) {
 798                 unsigned char *d;
 799                 char *m;
 800                 int len;
 801
 802                 print_name(out, "/*\n"
 803                                 " * Subject: ", X509_get_subject_name(x), get_nameopt());
 804                 print_name(out, " * Issuer:  ", X509_get_issuer_name(x), get_nameopt());
 805                 BIO_puts(out, " */\n");
 806
 807                 len = i2d_X509(x, NULL);
 808                 m = app_malloc(len, "x509 name buffer");
 809                 d = (unsigned char *)m;
 810                 len = i2d_X509_NAME(X509_get_subject_name(x), &d);
 811                 print_array(out, "the_subject_name", len, (unsigned char *)m);
 812                 d = (unsigned char *)m;
 813                 len = i2d_X509_PUBKEY(X509_get_X509_PUBKEY(x), &d);
 814                 print_array(out, "the_public_key", len, (unsigned char *)m);
 815                 d = (unsigned char *)m;
 816                 len = i2d_X509(x, &d);
 817                 print_array(out, "the_certificate", len, (unsigned char *)m);
 818                 OPENSSL_free(m);
 819             } else if (text == i) {
 820                 X509_print_ex(out, x, get_nameopt(), certflag);
 821             } else if (startdate == i) {
 822                 BIO_puts(out, "notBefore=");
 823                 ASN1_TIME_print(out, X509_get0_notBefore(x));
 824                 BIO_puts(out, "\n");
 825             } else if (enddate == i) {
 826                 BIO_puts(out, "notAfter=");
 827                 ASN1_TIME_print(out, X509_get0_notAfter(x));
 828                 BIO_puts(out, "\n");
 829             } else if (fingerprint == i) {
 830                 int j;
 831                 unsigned int n;
 832                 unsigned char md[EVP_MAX_MD_SIZE];
 833                 const EVP_MD *fdig = digest;
 834
 835                 if (fdig == NULL)
 836                     fdig = EVP_sha1();
 837
 838                 if (!X509_digest(x, fdig, md, &n)) {
 839                     BIO_printf(bio_err, "out of memory\n");
 840                     goto end;
 841                 }
 842                 BIO_printf(out, "%s Fingerprint=",
 843                            OBJ_nid2sn(EVP_MD_type(fdig)));
 844                 for (j = 0; j < (int)n; j++) {
 845                     BIO_printf(out, "%02X%c", md[j], (j + 1 == (int)n)
 846                                ? '\n' : ':');
 847                 }
 848             }
 849
 850             /* should be in the library */
 851             else if (sign_flag == i && x509req == 0) {
 852                 BIO_printf(bio_err, "Getting Private key\n");
 853                 if (Upkey == NULL) {
 854                     Upkey = load_key(keyfile, keyformat, 0,
 855                                      passin, e, "Private key");
 856                     if (Upkey == NULL)
 857                         goto end;
 858                 }
 859
 860                 if (!sign(x, Upkey, fkey, sigopts, days, clrext, digest,
 861                           extconf, extsect, preserve_dates))
 862                     goto end;
 863             } else if (CA_flag == i) {
 864                 BIO_printf(bio_err, "Getting CA Private Key\n");
 865                 if (CAkeyfile != NULL) {
 866                     CApkey = load_key(CAkeyfile, CAkeyformat,
 867                                       0, passin, e, "CA Private Key");
 868                     if (CApkey == NULL)
 869                         goto end;
 870                 }
 871
 872                 if (!x509_certify(ctx, CAfile, digest, x, xca,
 873                                   CApkey, sigopts,
 874                                   CAserial, CA_createserial, days, clrext,
 875                                   extconf, extsect, sno, reqfile, preserve_dates))
 876                     goto end;
 877             } else if (x509req == i) {
 878                 EVP_PKEY *pk;
 879
 880                 BIO_printf(bio_err, "Getting request Private Key\n");
 881                 if (keyfile == NULL) {
 882                     BIO_printf(bio_err, "no request key file specified\n");
 883                     goto end;
 884                 } else {
 885                     pk = load_key(keyfile, keyformat, 0,
 886                                   passin, e, "request key");
 887                     if (pk == NULL)
 888                         goto end;
 889                 }
 890
 891                 BIO_printf(bio_err, "Generating certificate request\n");
 892
 893                 rq = X509_to_X509_REQ(x, pk, digest);
 894                 EVP_PKEY_free(pk);
 895                 if (rq == NULL) {
 896                     ERR_print_errors(bio_err);
 897                     goto end;
 898                 }
 899                 if (!noout) {
 900                     X509_REQ_print_ex(out, rq, get_nameopt(), X509_FLAG_COMPAT);
 901                     PEM_write_bio_X509_REQ(out, rq);
 902                 }
 903                 noout = 1;
 904             } else if (ocspid == i) {
 905                 X509_ocspid_print(out, x);
 906             } else if (ext == i) {
 907                 print_x509v3_exts(out, x, exts);
 908             }
 909         }
 910     }
 911
 912     if (checkend) {
 913         time_t tcheck = time(NULL) + checkoffset;
 914
 915         if (X509_cmp_time(X509_get0_notAfter(x), &tcheck) < 0) {
 916             BIO_printf(out, "Certificate will expire\n");
 917             ret = 1;
 918         } else {
 919             BIO_printf(out, "Certificate will not expire\n");
 920             ret = 0;
 921         }
 922         goto end;
 923     }
 924
 925     print_cert_checks(out, x, checkhost, checkemail, checkip);
 926
 927     if (noout || nocert) {
 928         ret = 0;
 929         goto end;
 930     }
 931
 932     if (outformat == FORMAT_ASN1) {
 933         i = i2d_X509_bio(out, x);
 934     } else if (outformat == FORMAT_PEM) {
 935         if (trustout)
 936             i = PEM_write_bio_X509_AUX(out, x);
 937         else
 938             i = PEM_write_bio_X509(out, x);
 939     } else {
 940         BIO_printf(bio_err, "bad output format specified for outfile\n");
 941         goto end;
 942     }
 943     if (!i) {
 944         BIO_printf(bio_err, "unable to write certificate\n");
 945         ERR_print_errors(bio_err);
 946         goto end;
 947     }
 948     ret = 0;
 949  end:
 950     NCONF_free(extconf);
 951     BIO_free_all(out);
 952     X509_STORE_free(ctx);
 953     X509_NAME_free(fsubj);
 954     X509_REQ_free(req);
 955     X509_free(x);
 956     X509_free(xca);
 957     EVP_PKEY_free(Upkey);
 958     EVP_PKEY_free(CApkey);
 959     EVP_PKEY_free(fkey);
 960     sk_OPENSSL_STRING_free(sigopts);
 961     sk_OPENSSL_STRING_free(vfyopts);
 962     X509_REQ_free(rq);
 963     ASN1_INTEGER_free(sno);
 964     sk_ASN1_OBJECT_pop_free(trust, ASN1_OBJECT_free);
 965     sk_ASN1_OBJECT_pop_free(reject, ASN1_OBJECT_free);
 966     ASN1_OBJECT_free(objtmp);
 967     release_engine(e);
 968     OPENSSL_free(passin);
 969     return ret;
 970 }
 971
 972 static ASN1_INTEGER *x509_load_serial(const char *CAfile,
 973                                       const char *serialfile, int create)
 974 {
 975     char *buf = NULL;
 976     ASN1_INTEGER *bs = NULL;
 977     BIGNUM *serial = NULL;
 978
 979     if (serialfile == NULL) {
 980         const char *p = strrchr(CAfile, '.');
 981         size_t len = p != NULL ? (size_t)(p - CAfile) : strlen(CAfile);
 982
 983         buf = app_malloc(len + sizeof(POSTFIX), "serial# buffer");
 984         memcpy(buf, CAfile, len);
 985         memcpy(buf + len, POSTFIX, sizeof(POSTFIX));
 986         serialfile = buf;
 987     }
 988
 989     serial = load_serial(serialfile, create, NULL);
 990     if (serial == NULL)
 991         goto end;
 992
 993     if (!BN_add_word(serial, 1)) {
 994         BIO_printf(bio_err, "add_word failure\n");
 995         goto end;
 996     }
 997
 998     if (!save_serial(serialfile, NULL, serial, &bs))
 999         goto end;
1000
1001  end:
1002     OPENSSL_free(buf);
1003     BN_free(serial);
1004     return bs;
1005 }
1006
1007 static int x509_certify(X509_STORE *ctx, const char *CAfile, const EVP_MD *digest,
1008                         X509 *x, X509 *xca, EVP_PKEY *pkey,
1009                         STACK_OF(OPENSSL_STRING) *sigopts,
1010                         const char *serialfile, int create,
1011                         int days, int clrext, CONF *conf, const char *section,
1012                         ASN1_INTEGER *sno, int reqfile, int preserve_dates)
1013 {
1014     int ret = 0;
1015     ASN1_INTEGER *bs = NULL;
1016     X509_STORE_CTX *xsc = NULL;
1017     EVP_PKEY *upkey;
1018
1019     upkey = X509_get0_pubkey(xca);
1020     if (upkey == NULL) {
1021         BIO_printf(bio_err, "Error obtaining CA X509 public key\n");
1022         goto end;
1023     }
1024     EVP_PKEY_copy_parameters(upkey, pkey);
1025
1026     xsc = X509_STORE_CTX_new();
1027     if (xsc == NULL || !X509_STORE_CTX_init(xsc, ctx, x, NULL)) {
1028         BIO_printf(bio_err, "Error initialising X509 store\n");
1029         goto end;
1030     }
1031     if (sno)
1032         bs = sno;
1033     else if ((bs = x509_load_serial(CAfile, serialfile, create)) == NULL)
1034         goto end;
1035
1036     /*
1037      * NOTE: this certificate can/should be self signed, unless it was a
1038      * certificate request in which case it is not.
1039      */
1040     X509_STORE_CTX_set_cert(xsc, x);
1041     X509_STORE_CTX_set_flags(xsc, X509_V_FLAG_CHECK_SS_SIGNATURE);
1042     if (!reqfile && X509_verify_cert(xsc) <= 0)
1043         goto end;
1044
1045     if (!X509_check_private_key(xca, pkey)) {
1046         BIO_printf(bio_err,
1047                    "CA certificate and CA private key do not match\n");
1048         goto end;
1049     }
1050
1051     if (!X509_set_issuer_name(x, X509_get_subject_name(xca)))
1052         goto end;
1053     if (!X509_set_serialNumber(x, bs))
1054         goto end;
1055
1056     if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
1057         goto end;
1058
1059     if (clrext) {
1060         while (X509_get_ext_count(x) > 0)
1061             X509_delete_ext(x, 0);
1062     }
1063
1064     if (conf != NULL) {
1065         X509V3_CTX ctx2;
1066         X509_set_version(x, 2); /* version 3 certificate */
1067         X509V3_set_ctx(&ctx2, xca, x, NULL, NULL, 0);
1068         X509V3_set_nconf(&ctx2, conf);
1069         if (!X509V3_EXT_add_nconf(conf, &ctx2, section, x))
1070             goto end;
1071     }
1072
1073     if (!do_X509_sign(x, pkey, digest, sigopts))
1074         goto end;
1075     ret = 1;
1076  end:
1077     X509_STORE_CTX_free(xsc);
1078     if (!ret)
1079         ERR_print_errors(bio_err);
1080     if (!sno)
1081         ASN1_INTEGER_free(bs);
1082     return ret;
1083 }
1084
1085 static int callb(int ok, X509_STORE_CTX *ctx)
1086 {
1087     int err;
1088     X509 *err_cert;
1089
1090     /*
1091      * it is ok to use a self signed certificate This case will catch both
1092      * the initial ok == 0 and the final ok == 1 calls to this function
1093      */
1094     err = X509_STORE_CTX_get_error(ctx);
1095     if (err == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
1096         return 1;
1097
1098     /*
1099      * BAD we should have gotten an error.  Normally if everything worked
1100      * X509_STORE_CTX_get_error(ctx) will still be set to
1101      * DEPTH_ZERO_SELF_....
1102      */
1103     if (ok) {
1104         BIO_printf(bio_err,
1105                    "error with certificate to be certified - should be self signed\n");
1106         return 0;
1107     } else {
1108         err_cert = X509_STORE_CTX_get_current_cert(ctx);
1109         print_name(bio_err, NULL, X509_get_subject_name(err_cert), 0);
1110         BIO_printf(bio_err,
1111                    "error with certificate - error %d at depth %d\n%s\n", err,
1112                    X509_STORE_CTX_get_error_depth(ctx),
1113                    X509_verify_cert_error_string(err));
1114         return 1;
1115     }
1116 }
1117
1118 /* self-issue; self-sign unless a forced public key (fkey) is given */
1119 static int sign(X509 *x, EVP_PKEY *pkey, EVP_PKEY *fkey,
1120                 STACK_OF(OPENSSL_STRING) *sigopts,
1121                 int days, int clrext,
1122                 const EVP_MD *digest, CONF *conf, const char *section,
1123                 int preserve_dates)
1124 {
1125     if (!X509_set_issuer_name(x, X509_get_subject_name(x)))
1126         goto err;
1127     if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
1128         goto err;
1129     if (fkey == NULL && !X509_set_pubkey(x, pkey))
1130         goto err;
1131     if (clrext) {
1132         while (X509_get_ext_count(x) > 0)
1133             X509_delete_ext(x, 0);
1134     }
1135     if (conf != NULL) {
1136         X509V3_CTX ctx;
1137         X509_set_version(x, 2); /* version 3 certificate */
1138         X509V3_set_ctx(&ctx, x, x, NULL, NULL, 0);
1139         X509V3_set_nconf(&ctx, conf);
1140         if (!X509V3_EXT_add_nconf(conf, &ctx, section, x))
1141             goto err;
1142     }
1143     if (!do_X509_sign(x, pkey, digest, sigopts))
1144         goto err;
1145     return 1;
1146  err:
1147     ERR_print_errors(bio_err);
1148     return 0;
1149 }
1150
1151 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt)
1152 {
1153     int id, i, idret;
1154     const char *pname;
1155     id = X509_PURPOSE_get_id(pt);
1156     pname = X509_PURPOSE_get0_name(pt);
1157     for (i = 0; i < 2; i++) {
1158         idret = X509_check_purpose(cert, id, i);
1159         BIO_printf(bio, "%s%s : ", pname, i ? " CA" : "");
1160         if (idret == 1)
1161             BIO_printf(bio, "Yes\n");
1162         else if (idret == 0)
1163             BIO_printf(bio, "No\n");
1164         else
1165             BIO_printf(bio, "Yes (WARNING code=%d)\n", idret);
1166     }
1167     return 1;
1168 }
1169
1170 static int parse_ext_names(char *names, const char **result)
1171 {
1172     char *p, *q;
1173     int cnt = 0, len = 0;
1174
1175     p = q = names;
1176     len = strlen(names);
1177
1178     while (q - names <= len) {
1179         if (*q != ',' && *q != '\0') {
1180             q++;
1181             continue;
1182         }
1183         if (p != q) {
1184             /* found */
1185             if (result != NULL) {
1186                 result[cnt] = p;
1187                 *q = '\0';
1188             }
1189             cnt++;
1190         }
1191         p = ++q;
1192     }
1193
1194     return cnt;
1195 }
1196
1197 static int print_x509v3_exts(BIO *bio, X509 *x, const char *ext_names)
1198 {
1199     const STACK_OF(X509_EXTENSION) *exts = NULL;
1200     STACK_OF(X509_EXTENSION) *exts2 = NULL;
1201     X509_EXTENSION *ext = NULL;
1202     ASN1_OBJECT *obj;
1203     int i, j, ret = 0, num, nn = 0;
1204     const char *sn, **names = NULL;
1205     char *tmp_ext_names = NULL;
1206
1207     exts = X509_get0_extensions(x);
1208     if ((num = sk_X509_EXTENSION_num(exts)) <= 0) {
1209         BIO_printf(bio, "No extensions in certificate\n");
1210         ret = 1;
1211         goto end;
1212     }
1213
1214     /* parse comma separated ext name string */
1215     if ((tmp_ext_names = OPENSSL_strdup(ext_names)) == NULL)
1216         goto end;
1217     if ((nn = parse_ext_names(tmp_ext_names, NULL)) == 0) {
1218         BIO_printf(bio, "Invalid extension names: %s\n", ext_names);
1219         goto end;
1220     }
1221     if ((names = OPENSSL_malloc(sizeof(char *) * nn)) == NULL)
1222         goto end;
1223     parse_ext_names(tmp_ext_names, names);
1224
1225     for (i = 0; i < num; i++) {
1226         ext = sk_X509_EXTENSION_value(exts, i);
1227
1228         /* check if this ext is what we want */
1229         obj = X509_EXTENSION_get_object(ext);
1230         sn = OBJ_nid2sn(OBJ_obj2nid(obj));
1231         if (sn == NULL || strcmp(sn, "UNDEF") == 0)
1232             continue;
1233
1234         for (j = 0; j < nn; j++) {
1235             if (strcmp(sn, names[j]) == 0) {
1236                 /* push the extension into a new stack */
1237                 if (exts2 == NULL
1238                     && (exts2 = sk_X509_EXTENSION_new_null()) == NULL)
1239                     goto end;
1240                 if (!sk_X509_EXTENSION_push(exts2, ext))
1241                     goto end;
1242             }
1243         }
1244     }
1245
1246     if (!sk_X509_EXTENSION_num(exts2)) {
1247         BIO_printf(bio, "No extensions matched with %s\n", ext_names);
1248         ret = 1;
1249         goto end;
1250     }
1251
1252     ret = X509V3_extensions_print(bio, NULL, exts2, 0, 0);
1253  end:
1254     sk_X509_EXTENSION_free(exts2);
1255     OPENSSL_free(names);
1256     OPENSSL_free(tmp_ext_names);
1257     return ret;
1258 }