apps/x509.c

   1 /*
   2  * Copyright 1995-2020 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 DEFINE_STACK_OF(ASN1_OBJECT)
  32 DEFINE_STACK_OF(X509_EXTENSION)
  33 DEFINE_STACK_OF_STRING()
  34
  35 #undef POSTFIX
  36 #define POSTFIX ".srl"
  37 #define DEF_DAYS        30
  38
  39 static int callb(int ok, X509_STORE_CTX *ctx);
  40 static int sign(X509 *x, EVP_PKEY *pkey, EVP_PKEY *fkey,
  41                 STACK_OF(OPENSSL_STRING) *sigopts,
  42                 int days, int clrext,
  43                 const EVP_MD *digest, CONF *conf, const char *section,
  44                 int preserve_dates);
  45 static int x509_certify(X509_STORE *ctx, const char *CAfile, const EVP_MD *digest,
  46                         X509 *x, X509 *xca, EVP_PKEY *pkey,
  47                         STACK_OF(OPENSSL_STRING) *sigopts, const char *serialfile,
  48                         int create, int days, int clrext, CONF *conf,
  49                         const char *section, ASN1_INTEGER *sno, int reqfile,
  50                         int preserve_dates);
  51 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt);
  52 static int print_x509v3_exts(BIO *bio, X509 *x, const char *exts);
  53
  54 typedef enum OPTION_choice {
  55     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  56     OPT_INFORM, OPT_OUTFORM, OPT_KEYFORM, OPT_REQ, OPT_CAFORM,
  57     OPT_CAKEYFORM, OPT_VFYOPT, OPT_SIGOPT, OPT_DAYS, OPT_PASSIN, OPT_EXTFILE,
  58     OPT_EXTENSIONS, OPT_IN, OPT_OUT, OPT_SIGNKEY, OPT_CA, OPT_CAKEY,
  59     OPT_CASERIAL, OPT_SET_SERIAL, OPT_NEW, OPT_FORCE_PUBKEY, OPT_SUBJ,
  60     OPT_ADDTRUST, OPT_ADDREJECT, OPT_SETALIAS, OPT_CERTOPT, OPT_NAMEOPT,
  61     OPT_C, OPT_EMAIL, OPT_OCSP_URI, OPT_SERIAL, OPT_NEXT_SERIAL,
  62     OPT_MODULUS, OPT_PUBKEY, OPT_X509TOREQ, OPT_TEXT, OPT_HASH,
  63     OPT_ISSUER_HASH, OPT_SUBJECT, OPT_ISSUER, OPT_FINGERPRINT, OPT_DATES,
  64     OPT_PURPOSE, OPT_STARTDATE, OPT_ENDDATE, OPT_CHECKEND, OPT_CHECKHOST,
  65     OPT_CHECKEMAIL, OPT_CHECKIP, OPT_NOOUT, OPT_TRUSTOUT, OPT_CLRTRUST,
  66     OPT_CLRREJECT, OPT_ALIAS, OPT_CACREATESERIAL, OPT_CLREXT, OPT_OCSPID,
  67     OPT_SUBJECT_HASH_OLD,
  68     OPT_ISSUER_HASH_OLD,
  69     OPT_BADSIG, OPT_MD, OPT_ENGINE, OPT_NOCERT, OPT_PRESERVE_DATES,
  70     OPT_R_ENUM, OPT_PROV_ENUM, OPT_EXT
  71 } OPTION_CHOICE;
  72
  73 const OPTIONS x509_options[] = {
  74     OPT_SECTION("General"),
  75     {"help", OPT_HELP, '-', "Display this summary"},
  76 #ifndef OPENSSL_NO_ENGINE
  77     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  78 #endif
  79
  80     {"inform", OPT_INFORM, 'f',
  81      "CSR input format (DER or PEM) - default PEM"},
  82     {"in", OPT_IN, '<', "Input file - default stdin"},
  83     {"passin", OPT_PASSIN, 's', "Private key password/pass-phrase source"},
  84     {"outform", OPT_OUTFORM, 'f',
  85      "Output format (DER or PEM) - default PEM"},
  86     {"out", OPT_OUT, '>', "Output file - default stdout"},
  87     {"keyform", OPT_KEYFORM, 'E', "Private key format (ENGINE, other values ignored)"},
  88     {"req", OPT_REQ, '-', "Input is a certificate request, sign and output"},
  89     {"vfyopt", OPT_VFYOPT, 's', "Verification parameter in n:v form"},
  90
  91     OPT_SECTION("Output"),
  92     {"serial", OPT_SERIAL, '-', "Print serial number value"},
  93     {"subject_hash", OPT_HASH, '-', "Print subject hash value"},
  94     {"issuer_hash", OPT_ISSUER_HASH, '-', "Print issuer hash value"},
  95     {"hash", OPT_HASH, '-', "Synonym for -subject_hash"},
  96     {"subject", OPT_SUBJECT, '-', "Print subject DN"},
  97     {"issuer", OPT_ISSUER, '-', "Print issuer DN"},
  98     {"email", OPT_EMAIL, '-', "Print email address(es)"},
  99     {"purpose", OPT_PURPOSE, '-', "Print out certificate purposes"},
 100     {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
 101     {"pubkey", OPT_PUBKEY, '-', "Output the public key"},
 102     {"fingerprint", OPT_FINGERPRINT, '-', "Print the certificate fingerprint"},
 103     {"alias", OPT_ALIAS, '-', "Output certificate alias"},
 104     {"noout", OPT_NOOUT, '-', "No output, just status"},
 105     {"ocspid", OPT_OCSPID, '-',
 106      "Print OCSP hash values for the subject name and public key"},
 107     {"ocsp_uri", OPT_OCSP_URI, '-', "Print OCSP Responder URL(s)"},
 108     {"nocert", OPT_NOCERT, '-', "No certificate output"},
 109     {"trustout", OPT_TRUSTOUT, '-', "Output a trusted certificate"},
 110     {"x509toreq", OPT_X509TOREQ, '-',
 111      "Output a certification request object"},
 112     {"checkend", OPT_CHECKEND, 'M',
 113      "Check whether the cert expires in the next arg seconds"},
 114     {OPT_MORE_STR, 1, 1, "Exit 1 if so, 0 if not"},
 115     {"text", OPT_TEXT, '-', "Print the certificate in text form"},
 116     {"ext", OPT_EXT, 's', "Print various X509V3 extensions"},
 117     {"C", OPT_C, '-', "Print out C code forms"},
 118 #ifndef OPENSSL_NO_MD5
 119     {"subject_hash_old", OPT_SUBJECT_HASH_OLD, '-',
 120      "Print old-style (MD5) issuer hash value"},
 121     {"issuer_hash_old", OPT_ISSUER_HASH_OLD, '-',
 122      "Print old-style (MD5) subject hash value"},
 123 #endif
 124     {"nameopt", OPT_NAMEOPT, 's', "Certificate subject/issuer name printing options"},
 125
 126     OPT_SECTION("Certificate"),
 127     {"startdate", OPT_STARTDATE, '-', "Set notBefore field"},
 128     {"enddate", OPT_ENDDATE, '-', "Set notAfter field"},
 129     {"dates", OPT_DATES, '-', "Both Before and After dates"},
 130     {"clrtrust", OPT_CLRTRUST, '-', "Clear all trusted purposes"},
 131     {"clrext", OPT_CLREXT, '-', "Clear all certificate extensions"},
 132     {"addtrust", OPT_ADDTRUST, 's', "Trust certificate for a given purpose"},
 133     {"addreject", OPT_ADDREJECT, 's',
 134      "Reject certificate for a given purpose"},
 135     {"setalias", OPT_SETALIAS, 's', "Set certificate alias"},
 136     {"days", OPT_DAYS, 'n',
 137      "How long till expiry of a signed certificate - def 30 days"},
 138     {"signkey", OPT_SIGNKEY, 's', "Self-sign cert with arg"},
 139     {"set_serial", OPT_SET_SERIAL, 's', "Serial number to use"},
 140     {"extensions", OPT_EXTENSIONS, 's', "Section from config file to use"},
 141     {"certopt", OPT_CERTOPT, 's', "Various certificate text options"},
 142     {"checkhost", OPT_CHECKHOST, 's', "Check certificate matches host"},
 143     {"checkemail", OPT_CHECKEMAIL, 's', "Check certificate matches email"},
 144     {"checkip", OPT_CHECKIP, 's', "Check certificate matches ipaddr"},
 145     {"force_pubkey", OPT_FORCE_PUBKEY, '<', "Force the key to put inside certificate"},
 146     {"subj", OPT_SUBJ, 's', "Set or override certificate subject (and issuer)"},
 147
 148     OPT_SECTION("CA"),
 149     {"CA", OPT_CA, '<', "Set the CA certificate, must be PEM format"},
 150     {"CAkey", OPT_CAKEY, 's',
 151      "The CA key, must be PEM format; if not in CAfile"},
 152     {"extfile", OPT_EXTFILE, '<', "File with X509V3 extensions to add"},
 153     OPT_R_OPTIONS,
 154     OPT_PROV_OPTIONS,
 155     {"CAform", OPT_CAFORM, 'F', "CA cert format (PEM/DER/P12); has no effect"},
 156     {"CAkeyform", OPT_CAKEYFORM, 'E', "CA key format (ENGINE, other values ignored)"},
 157     {"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
 158     {"CAcreateserial", OPT_CACREATESERIAL, '-',
 159      "Create serial number file if it does not exist"},
 160     {"CAserial", OPT_CASERIAL, 's', "Serial file"},
 161     {"new", OPT_NEW, '-', "Generate a certificate from scratch"},
 162     {"next_serial", OPT_NEXT_SERIAL, '-', "Increment current certificate serial number"},
 163     {"clrreject", OPT_CLRREJECT, '-',
 164      "Clears all the prohibited or rejected uses of the certificate"},
 165     {"badsig", OPT_BADSIG, '-', "Corrupt last byte of certificate signature (for test)"},
 166     {"", OPT_MD, '-', "Any supported digest"},
 167     {"preserve_dates", OPT_PRESERVE_DATES, '-', "preserve existing dates when signing"},
 168     {NULL}
 169 };
 170
 171 int x509_main(int argc, char **argv)
 172 {
 173     ASN1_INTEGER *sno = NULL;
 174     ASN1_OBJECT *objtmp = NULL;
 175     BIO *out = NULL;
 176     CONF *extconf = NULL;
 177     EVP_PKEY *Upkey = NULL, *CApkey = NULL, *fkey = NULL;
 178     int newcert = 0;
 179     char *subj = NULL;
 180     X509_NAME *fsubj = NULL;
 181     const unsigned long chtype = MBSTRING_ASC;
 182     const int multirdn = 0;
 183     STACK_OF(ASN1_OBJECT) *trust = NULL, *reject = NULL;
 184     STACK_OF(OPENSSL_STRING) *sigopts = NULL, *vfyopts = NULL;
 185     X509 *x = NULL, *xca = NULL;
 186     X509_REQ *req = NULL, *rq = NULL;
 187     X509_STORE *ctx = NULL;
 188     const EVP_MD *digest = NULL;
 189     char *CAkeyfile = NULL, *CAserial = NULL, *fkeyfile = NULL, *alias = NULL;
 190     char *checkhost = NULL, *checkemail = NULL, *checkip = NULL, *exts = NULL;
 191     char *extsect = NULL, *extfile = NULL, *passin = NULL, *passinarg = NULL;
 192     char *infile = NULL, *outfile = NULL, *keyfile = NULL, *CAfile = NULL;
 193     char *prog;
 194     int x509req = 0, days = DEF_DAYS, modulus = 0, pubkey = 0, pprint = 0;
 195     int C = 0, CAformat = FORMAT_PEM, CAkeyformat = FORMAT_PEM;
 196     int fingerprint = 0, reqfile = 0, checkend = 0;
 197     int informat = FORMAT_PEM, outformat = FORMAT_PEM, keyformat = FORMAT_PEM;
 198     int next_serial = 0, subject_hash = 0, issuer_hash = 0, ocspid = 0;
 199     int noout = 0, sign_flag = 0, CA_flag = 0, CA_createserial = 0, email = 0;
 200     int ocsp_uri = 0, trustout = 0, clrtrust = 0, clrreject = 0, aliasout = 0;
 201     int ret = 1, i, num = 0, badsig = 0, clrext = 0, nocert = 0;
 202     int text = 0, serial = 0, subject = 0, issuer = 0, startdate = 0, ext = 0;
 203     int enddate = 0;
 204     time_t checkoffset = 0;
 205     unsigned long certflag = 0;
 206     int preserve_dates = 0;
 207     OPTION_CHOICE o;
 208     ENGINE *e = NULL;
 209 #ifndef OPENSSL_NO_MD5
 210     int subject_hash_old = 0, issuer_hash_old = 0;
 211 #endif
 212
 213     ctx = X509_STORE_new();
 214     if (ctx == NULL)
 215         goto end;
 216     X509_STORE_set_verify_cb(ctx, callb);
 217
 218     prog = opt_init(argc, argv, x509_options);
 219     while ((o = opt_next()) != OPT_EOF) {
 220         switch (o) {
 221         case OPT_EOF:
 222         case OPT_ERR:
 223  opthelp:
 224             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 225             goto end;
 226         case OPT_HELP:
 227             opt_help(x509_options);
 228             ret = 0;
 229             goto end;
 230         case OPT_INFORM:
 231             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
 232                 goto opthelp;
 233             break;
 234         case OPT_IN:
 235             infile = opt_arg();
 236             break;
 237         case OPT_OUTFORM:
 238             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 239                 goto opthelp;
 240             break;
 241         case OPT_KEYFORM:
 242             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
 243                 goto opthelp;
 244             break;
 245         case OPT_CAFORM:
 246             if (!opt_format(opt_arg(), OPT_FMT_ANY, &CAformat))
 247                 goto opthelp;
 248             break;
 249         case OPT_CAKEYFORM:
 250             if (!opt_format(opt_arg(), OPT_FMT_ANY, &CAkeyformat))
 251                 goto opthelp;
 252             break;
 253         case OPT_OUT:
 254             outfile = opt_arg();
 255             break;
 256         case OPT_REQ:
 257             reqfile = 1;
 258             break;
 259
 260         case OPT_SIGOPT:
 261             if (!sigopts)
 262                 sigopts = sk_OPENSSL_STRING_new_null();
 263             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 264                 goto opthelp;
 265             break;
 266         case OPT_VFYOPT:
 267             if (!vfyopts)
 268                 vfyopts = sk_OPENSSL_STRING_new_null();
 269             if (!vfyopts || !sk_OPENSSL_STRING_push(vfyopts, opt_arg()))
 270                 goto opthelp;
 271             break;
 272         case OPT_DAYS:
 273             if (preserve_dates)
 274                 goto opthelp;
 275             days = atoi(opt_arg());
 276             break;
 277         case OPT_PASSIN:
 278             passinarg = opt_arg();
 279             break;
 280         case OPT_EXTFILE:
 281             extfile = opt_arg();
 282             break;
 283         case OPT_R_CASES:
 284             if (!opt_rand(o))
 285                 goto end;
 286             break;
 287         case OPT_PROV_CASES:
 288             if (!opt_provider(o))
 289                 goto end;
 290             break;
 291         case OPT_EXTENSIONS:
 292             extsect = opt_arg();
 293             break;
 294         case OPT_SIGNKEY:
 295             keyfile = opt_arg();
 296             sign_flag = ++num;
 297             break;
 298         case OPT_CA:
 299             CAfile = opt_arg();
 300             CA_flag = ++num;
 301             break;
 302         case OPT_CAKEY:
 303             CAkeyfile = opt_arg();
 304             break;
 305         case OPT_CASERIAL:
 306             CAserial = opt_arg();
 307             break;
 308         case OPT_SET_SERIAL:
 309             if (sno != NULL) {
 310                 BIO_printf(bio_err, "Serial number supplied twice\n");
 311                 goto opthelp;
 312             }
 313             if ((sno = s2i_ASN1_INTEGER(NULL, opt_arg())) == NULL)
 314                 goto opthelp;
 315             break;
 316         case OPT_NEW:
 317             newcert = 1;
 318             break;
 319         case OPT_FORCE_PUBKEY:
 320             fkeyfile = opt_arg();
 321             break;
 322         case OPT_SUBJ:
 323             subj = opt_arg();
 324             break;
 325         case OPT_ADDTRUST:
 326             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 327                 BIO_printf(bio_err,
 328                            "%s: Invalid trust object value %s\n",
 329                            prog, opt_arg());
 330                 goto opthelp;
 331             }
 332             if (trust == NULL && (trust = sk_ASN1_OBJECT_new_null()) == NULL)
 333                 goto end;
 334             sk_ASN1_OBJECT_push(trust, objtmp);
 335             objtmp = NULL;
 336             trustout = 1;
 337             break;
 338         case OPT_ADDREJECT:
 339             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 340                 BIO_printf(bio_err,
 341                            "%s: Invalid reject object value %s\n",
 342                            prog, opt_arg());
 343                 goto opthelp;
 344             }
 345             if (reject == NULL
 346                 && (reject = sk_ASN1_OBJECT_new_null()) == NULL)
 347                 goto end;
 348             sk_ASN1_OBJECT_push(reject, objtmp);
 349             objtmp = NULL;
 350             trustout = 1;
 351             break;
 352         case OPT_SETALIAS:
 353             alias = opt_arg();
 354             trustout = 1;
 355             break;
 356         case OPT_CERTOPT:
 357             if (!set_cert_ex(&certflag, opt_arg()))
 358                 goto opthelp;
 359             break;
 360         case OPT_NAMEOPT:
 361             if (!set_nameopt(opt_arg()))
 362                 goto opthelp;
 363             break;
 364         case OPT_ENGINE:
 365             e = setup_engine(opt_arg(), 0);
 366             break;
 367         case OPT_C:
 368             C = ++num;
 369             break;
 370         case OPT_EMAIL:
 371             email = ++num;
 372             break;
 373         case OPT_OCSP_URI:
 374             ocsp_uri = ++num;
 375             break;
 376         case OPT_SERIAL:
 377             serial = ++num;
 378             break;
 379         case OPT_NEXT_SERIAL:
 380             next_serial = ++num;
 381             break;
 382         case OPT_MODULUS:
 383             modulus = ++num;
 384             break;
 385         case OPT_PUBKEY:
 386             pubkey = ++num;
 387             break;
 388         case OPT_X509TOREQ:
 389             x509req = ++num;
 390             break;
 391         case OPT_TEXT:
 392             text = ++num;
 393             break;
 394         case OPT_SUBJECT:
 395             subject = ++num;
 396             break;
 397         case OPT_ISSUER:
 398             issuer = ++num;
 399             break;
 400         case OPT_FINGERPRINT:
 401             fingerprint = ++num;
 402             break;
 403         case OPT_HASH:
 404             subject_hash = ++num;
 405             break;
 406         case OPT_ISSUER_HASH:
 407             issuer_hash = ++num;
 408             break;
 409         case OPT_PURPOSE:
 410             pprint = ++num;
 411             break;
 412         case OPT_STARTDATE:
 413             startdate = ++num;
 414             break;
 415         case OPT_ENDDATE:
 416             enddate = ++num;
 417             break;
 418         case OPT_NOOUT:
 419             noout = ++num;
 420             break;
 421         case OPT_EXT:
 422             ext = ++num;
 423             exts = opt_arg();
 424             break;
 425         case OPT_NOCERT:
 426             nocert = 1;
 427             break;
 428         case OPT_TRUSTOUT:
 429             trustout = 1;
 430             break;
 431         case OPT_CLRTRUST:
 432             clrtrust = ++num;
 433             break;
 434         case OPT_CLRREJECT:
 435             clrreject = ++num;
 436             break;
 437         case OPT_ALIAS:
 438             aliasout = ++num;
 439             break;
 440         case OPT_CACREATESERIAL:
 441             CA_createserial = ++num;
 442             break;
 443         case OPT_CLREXT:
 444             clrext = 1;
 445             break;
 446         case OPT_OCSPID:
 447             ocspid = ++num;
 448             break;
 449         case OPT_BADSIG:
 450             badsig = 1;
 451             break;
 452 #ifndef OPENSSL_NO_MD5
 453         case OPT_SUBJECT_HASH_OLD:
 454             subject_hash_old = ++num;
 455             break;
 456         case OPT_ISSUER_HASH_OLD:
 457             issuer_hash_old = ++num;
 458             break;
 459 #else
 460         case OPT_SUBJECT_HASH_OLD:
 461         case OPT_ISSUER_HASH_OLD:
 462             break;
 463 #endif
 464         case OPT_DATES:
 465             startdate = ++num;
 466             enddate = ++num;
 467             break;
 468         case OPT_CHECKEND:
 469             checkend = 1;
 470             {
 471                 intmax_t temp = 0;
 472                 if (!opt_imax(opt_arg(), &temp))
 473                     goto opthelp;
 474                 checkoffset = (time_t)temp;
 475                 if ((intmax_t)checkoffset != temp) {
 476                     BIO_printf(bio_err, "%s: checkend time out of range %s\n",
 477                                prog, opt_arg());
 478                     goto opthelp;
 479                 }
 480             }
 481             break;
 482         case OPT_CHECKHOST:
 483             checkhost = opt_arg();
 484             break;
 485         case OPT_CHECKEMAIL:
 486             checkemail = opt_arg();
 487             break;
 488         case OPT_CHECKIP:
 489             checkip = opt_arg();
 490             break;
 491         case OPT_PRESERVE_DATES:
 492             if (days != DEF_DAYS)
 493                 goto opthelp;
 494             preserve_dates = 1;
 495             break;
 496         case OPT_MD:
 497             if (!opt_md(opt_unknown(), &digest))
 498                 goto opthelp;
 499         }
 500     }
 501     argc = opt_num_rest();
 502     argv = opt_rest();
 503     if (argc != 0) {
 504         BIO_printf(bio_err, "%s: Unknown parameter %s\n", prog, argv[0]);
 505         goto opthelp;
 506     }
 507
 508     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 509         BIO_printf(bio_err, "Error getting password\n");
 510         goto end;
 511     }
 512
 513     if (!X509_STORE_set_default_paths(ctx)) {
 514         ERR_print_errors(bio_err);
 515         goto end;
 516     }
 517
 518     if (newcert && infile != NULL) {
 519         BIO_printf(bio_err, "The -in option must not be used since -new is set\n");
 520         goto end;
 521     }
 522     if (newcert && fkeyfile == NULL) {
 523         BIO_printf(bio_err,
 524                    "The -new option requires a public key to be set using -force_pubkey\n");
 525         goto end;
 526     }
 527     if (fkeyfile != NULL) {
 528         fkey = load_pubkey(fkeyfile, keyformat, 0, NULL, e, "Forced key");
 529         if (fkey == NULL)
 530             goto end;
 531     }
 532
 533     if (newcert && subj == NULL) {
 534         BIO_printf(bio_err,
 535                    "The -new option requires a subject to be set using -subj\n");
 536         goto end;
 537     }
 538     if (subj != NULL && (fsubj = parse_name(subj, chtype, multirdn)) == NULL)
 539         goto end;
 540
 541     if (CAkeyfile == NULL && CA_flag && CAformat == FORMAT_PEM) {
 542         CAkeyfile = CAfile;
 543     } else if (CA_flag && CAkeyfile == NULL) {
 544         BIO_printf(bio_err,
 545                    "need to specify a CAkey if using the CA command\n");
 546         goto end;
 547     } else if (!CA_flag && CAkeyfile != NULL) {
 548         BIO_printf(bio_err,
 549                    "ignoring -CAkey option since no -CA option is given\n");
 550     }
 551
 552     if (extfile != NULL) {
 553         X509V3_CTX ctx2;
 554         if ((extconf = app_load_config(extfile)) == NULL)
 555             goto end;
 556         if (extsect == NULL) {
 557             extsect = NCONF_get_string(extconf, "default", "extensions");
 558             if (extsect == NULL) {
 559                 ERR_clear_error();
 560                 extsect = "default";
 561             }
 562         }
 563         X509V3_set_ctx_test(&ctx2);
 564         X509V3_set_nconf(&ctx2, extconf);
 565         if (!X509V3_EXT_add_nconf(extconf, &ctx2, extsect, NULL)) {
 566             BIO_printf(bio_err,
 567                        "Error Loading extension section %s\n", extsect);
 568             ERR_print_errors(bio_err);
 569             goto end;
 570         }
 571     }
 572
 573     if (reqfile) {
 574         EVP_PKEY *pkey;
 575
 576         req = load_csr(infile, informat, "certificate request input");
 577         if (req == NULL)
 578             goto end;
 579
 580         if ((pkey = X509_REQ_get0_pubkey(req)) == NULL) {
 581             BIO_printf(bio_err, "error unpacking public key\n");
 582             goto end;
 583         }
 584         i = do_X509_REQ_verify(req, pkey, vfyopts);
 585         if (i < 0) {
 586             BIO_printf(bio_err, "Request self-signature verification error\n");
 587             ERR_print_errors(bio_err);
 588             goto end;
 589         }
 590         if (i == 0) {
 591             BIO_printf(bio_err,
 592                        "Request self-signature did not match the certificate request\n");
 593             goto end;
 594         } else {
 595             BIO_printf(bio_err, "Request self-signature ok\n");
 596         }
 597
 598         print_name(bio_err, "subject=", X509_REQ_get_subject_name(req),
 599                    get_nameopt());
 600     }
 601
 602     if (reqfile || newcert) {
 603         X509_NAME *n;
 604
 605         if (!sign_flag && CAkeyfile == NULL) {
 606             BIO_printf(bio_err,
 607                        "We need a private key to sign with, use -signkey or -CAkey or -CA <file> with private key\n");
 608             goto end;
 609         }
 610         if ((x = X509_new()) == NULL)
 611             goto end;
 612
 613         if (sno == NULL) {
 614             sno = ASN1_INTEGER_new();
 615             if (sno == NULL || !rand_serial(NULL, sno))
 616                 goto end;
 617             if (!X509_set_serialNumber(x, sno))
 618                 goto end;
 619             ASN1_INTEGER_free(sno);
 620             sno = NULL;
 621         } else if (!X509_set_serialNumber(x, sno)) {
 622             goto end;
 623         }
 624
 625         n = req == NULL ? fsubj : X509_REQ_get_subject_name(req);
 626         if (!X509_set_issuer_name(x, n) || !X509_set_subject_name(x, n))
 627             goto end;
 628         if (!set_cert_times(x, NULL, NULL, days))
 629             goto end;
 630
 631         if (!X509_set_pubkey(x, fkey != NULL ? fkey : X509_REQ_get0_pubkey(req)))
 632             goto end;
 633     } else {
 634         x = load_cert(infile, FORMAT_UNDEF, "Certificate");
 635         if (x == NULL)
 636             goto end;
 637         if (fkey != NULL && !X509_set_pubkey(x, fkey))
 638             goto end;
 639         if (fsubj != NULL && !X509_set_subject_name(x, fsubj))
 640             goto end;
 641     }
 642
 643     if (CA_flag) {
 644         xca = load_cert(CAfile, CAformat, "CA Certificate");
 645         if (xca == NULL)
 646             goto end;
 647     }
 648
 649     out = bio_open_default(outfile, 'w', outformat);
 650     if (out == NULL)
 651         goto end;
 652
 653     if (!noout || text || next_serial)
 654         OBJ_create("2.99999.3", "SET.ex3", "SET x509v3 extension 3");
 655
 656     if (alias)
 657         X509_alias_set1(x, (unsigned char *)alias, -1);
 658
 659     if (clrtrust)
 660         X509_trust_clear(x);
 661     if (clrreject)
 662         X509_reject_clear(x);
 663
 664     if (trust != NULL) {
 665         for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++) {
 666             objtmp = sk_ASN1_OBJECT_value(trust, i);
 667             X509_add1_trust_object(x, objtmp);
 668         }
 669         objtmp = NULL;
 670     }
 671
 672     if (reject != NULL) {
 673         for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++) {
 674             objtmp = sk_ASN1_OBJECT_value(reject, i);
 675             X509_add1_reject_object(x, objtmp);
 676         }
 677         objtmp = NULL;
 678     }
 679
 680     if (badsig) {
 681         const ASN1_BIT_STRING *signature;
 682
 683         X509_get0_signature(&signature, NULL, x);
 684         corrupt_signature(signature);
 685     }
 686
 687     if (num) {
 688         for (i = 1; i <= num; i++) {
 689             if (issuer == i) {
 690                 print_name(out, "issuer=", X509_get_issuer_name(x), get_nameopt());
 691             } else if (subject == i) {
 692                 print_name(out, "subject=",
 693                            X509_get_subject_name(x), get_nameopt());
 694             } else if (serial == i) {
 695                 BIO_printf(out, "serial=");
 696                 i2a_ASN1_INTEGER(out, X509_get_serialNumber(x));
 697                 BIO_printf(out, "\n");
 698             } else if (next_serial == i) {
 699                 ASN1_INTEGER *ser = X509_get_serialNumber(x);
 700                 BIGNUM *bnser = ASN1_INTEGER_to_BN(ser, NULL);
 701
 702                 if (!bnser)
 703                     goto end;
 704                 if (!BN_add_word(bnser, 1))
 705                     goto end;
 706                 ser = BN_to_ASN1_INTEGER(bnser, NULL);
 707                 if (!ser)
 708                     goto end;
 709                 BN_free(bnser);
 710                 i2a_ASN1_INTEGER(out, ser);
 711                 ASN1_INTEGER_free(ser);
 712                 BIO_puts(out, "\n");
 713             } else if (email == i || ocsp_uri == i) {
 714                 int j;
 715                 STACK_OF(OPENSSL_STRING) *emlst;
 716                 if (email == i)
 717                     emlst = X509_get1_email(x);
 718                 else
 719                     emlst = X509_get1_ocsp(x);
 720                 for (j = 0; j < sk_OPENSSL_STRING_num(emlst); j++)
 721                     BIO_printf(out, "%s\n",
 722                                sk_OPENSSL_STRING_value(emlst, j));
 723                 X509_email_free(emlst);
 724             } else if (aliasout == i) {
 725                 unsigned char *alstr;
 726                 alstr = X509_alias_get0(x, NULL);
 727                 if (alstr)
 728                     BIO_printf(out, "%s\n", alstr);
 729                 else
 730                     BIO_puts(out, "<No Alias>\n");
 731             } else if (subject_hash == i) {
 732                 BIO_printf(out, "%08lx\n", X509_subject_name_hash(x));
 733             }
 734 #ifndef OPENSSL_NO_MD5
 735             else if (subject_hash_old == i) {
 736                 BIO_printf(out, "%08lx\n", X509_subject_name_hash_old(x));
 737             }
 738 #endif
 739             else if (issuer_hash == i) {
 740                 BIO_printf(out, "%08lx\n", X509_issuer_name_hash(x));
 741             }
 742 #ifndef OPENSSL_NO_MD5
 743             else if (issuer_hash_old == i) {
 744                 BIO_printf(out, "%08lx\n", X509_issuer_name_hash_old(x));
 745             }
 746 #endif
 747             else if (pprint == i) {
 748                 X509_PURPOSE *ptmp;
 749                 int j;
 750                 BIO_printf(out, "Certificate purposes:\n");
 751                 for (j = 0; j < X509_PURPOSE_get_count(); j++) {
 752                     ptmp = X509_PURPOSE_get0(j);
 753                     purpose_print(out, x, ptmp);
 754                 }
 755             } else if (modulus == i) {
 756                 EVP_PKEY *pkey;
 757
 758                 pkey = X509_get0_pubkey(x);
 759                 if (pkey == NULL) {
 760                     BIO_printf(bio_err, "Modulus=unavailable\n");
 761                     ERR_print_errors(bio_err);
 762                     goto end;
 763                 }
 764                 BIO_printf(out, "Modulus=");
 765 #ifndef OPENSSL_NO_RSA
 766                 if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
 767                     const BIGNUM *n;
 768                     RSA_get0_key(EVP_PKEY_get0_RSA(pkey), &n, NULL, NULL);
 769                     BN_print(out, n);
 770                 } else
 771 #endif
 772 #ifndef OPENSSL_NO_DSA
 773                 if (EVP_PKEY_id(pkey) == EVP_PKEY_DSA) {
 774                     const BIGNUM *dsapub = NULL;
 775                     DSA_get0_key(EVP_PKEY_get0_DSA(pkey), &dsapub, NULL);
 776                     BN_print(out, dsapub);
 777                 } else
 778 #endif
 779                 {
 780                     BIO_printf(out, "Wrong Algorithm type");
 781                 }
 782                 BIO_printf(out, "\n");
 783             } else if (pubkey == i) {
 784                 EVP_PKEY *pkey;
 785
 786                 pkey = X509_get0_pubkey(x);
 787                 if (pkey == NULL) {
 788                     BIO_printf(bio_err, "Error getting public key\n");
 789                     ERR_print_errors(bio_err);
 790                     goto end;
 791                 }
 792                 PEM_write_bio_PUBKEY(out, pkey);
 793             } else if (C == i) {
 794                 unsigned char *d;
 795                 char *m;
 796                 int len;
 797
 798                 print_name(out, "/*\n"
 799                                 " * Subject: ", X509_get_subject_name(x), get_nameopt());
 800                 print_name(out, " * Issuer:  ", X509_get_issuer_name(x), get_nameopt());
 801                 BIO_puts(out, " */\n");
 802
 803                 len = i2d_X509(x, NULL);
 804                 m = app_malloc(len, "x509 name buffer");
 805                 d = (unsigned char *)m;
 806                 len = i2d_X509_NAME(X509_get_subject_name(x), &d);
 807                 print_array(out, "the_subject_name", len, (unsigned char *)m);
 808                 d = (unsigned char *)m;
 809                 len = i2d_X509_PUBKEY(X509_get_X509_PUBKEY(x), &d);
 810                 print_array(out, "the_public_key", len, (unsigned char *)m);
 811                 d = (unsigned char *)m;
 812                 len = i2d_X509(x, &d);
 813                 print_array(out, "the_certificate", len, (unsigned char *)m);
 814                 OPENSSL_free(m);
 815             } else if (text == i) {
 816                 X509_print_ex(out, x, get_nameopt(), certflag);
 817             } else if (startdate == i) {
 818                 BIO_puts(out, "notBefore=");
 819                 ASN1_TIME_print(out, X509_get0_notBefore(x));
 820                 BIO_puts(out, "\n");
 821             } else if (enddate == i) {
 822                 BIO_puts(out, "notAfter=");
 823                 ASN1_TIME_print(out, X509_get0_notAfter(x));
 824                 BIO_puts(out, "\n");
 825             } else if (fingerprint == i) {
 826                 int j;
 827                 unsigned int n;
 828                 unsigned char md[EVP_MAX_MD_SIZE];
 829                 const EVP_MD *fdig = digest;
 830
 831                 if (fdig == NULL)
 832                     fdig = EVP_sha1();
 833
 834                 if (!X509_digest(x, fdig, md, &n)) {
 835                     BIO_printf(bio_err, "out of memory\n");
 836                     goto end;
 837                 }
 838                 BIO_printf(out, "%s Fingerprint=",
 839                            OBJ_nid2sn(EVP_MD_type(fdig)));
 840                 for (j = 0; j < (int)n; j++) {
 841                     BIO_printf(out, "%02X%c", md[j], (j + 1 == (int)n)
 842                                ? '\n' : ':');
 843                 }
 844             }
 845
 846             /* should be in the library */
 847             else if (sign_flag == i && x509req == 0) {
 848                 BIO_printf(bio_err, "Getting Private key\n");
 849                 if (Upkey == NULL) {
 850                     Upkey = load_key(keyfile, keyformat, 0,
 851                                      passin, e, "Private key");
 852                     if (Upkey == NULL)
 853                         goto end;
 854                 }
 855
 856                 if (!sign(x, Upkey, fkey, sigopts, days, clrext, digest,
 857                           extconf, extsect, preserve_dates))
 858                     goto end;
 859             } else if (CA_flag == i) {
 860                 BIO_printf(bio_err, "Getting CA Private Key\n");
 861                 if (CAkeyfile != NULL) {
 862                     CApkey = load_key(CAkeyfile, CAkeyformat,
 863                                       0, passin, e, "CA Private Key");
 864                     if (CApkey == NULL)
 865                         goto end;
 866                 }
 867
 868                 if (!x509_certify(ctx, CAfile, digest, x, xca,
 869                                   CApkey, sigopts,
 870                                   CAserial, CA_createserial, days, clrext,
 871                                   extconf, extsect, sno, reqfile, preserve_dates))
 872                     goto end;
 873             } else if (x509req == i) {
 874                 EVP_PKEY *pk;
 875
 876                 BIO_printf(bio_err, "Getting request Private Key\n");
 877                 if (keyfile == NULL) {
 878                     BIO_printf(bio_err, "no request key file specified\n");
 879                     goto end;
 880                 } else {
 881                     pk = load_key(keyfile, keyformat, 0,
 882                                   passin, e, "request key");
 883                     if (pk == NULL)
 884                         goto end;
 885                 }
 886
 887                 BIO_printf(bio_err, "Generating certificate request\n");
 888
 889                 rq = X509_to_X509_REQ(x, pk, digest);
 890                 EVP_PKEY_free(pk);
 891                 if (rq == NULL) {
 892                     ERR_print_errors(bio_err);
 893                     goto end;
 894                 }
 895                 if (!noout) {
 896                     X509_REQ_print_ex(out, rq, get_nameopt(), X509_FLAG_COMPAT);
 897                     PEM_write_bio_X509_REQ(out, rq);
 898                 }
 899                 noout = 1;
 900             } else if (ocspid == i) {
 901                 X509_ocspid_print(out, x);
 902             } else if (ext == i) {
 903                 print_x509v3_exts(out, x, exts);
 904             }
 905         }
 906     }
 907
 908     if (checkend) {
 909         time_t tcheck = time(NULL) + checkoffset;
 910
 911         if (X509_cmp_time(X509_get0_notAfter(x), &tcheck) < 0) {
 912             BIO_printf(out, "Certificate will expire\n");
 913             ret = 1;
 914         } else {
 915             BIO_printf(out, "Certificate will not expire\n");
 916             ret = 0;
 917         }
 918         goto end;
 919     }
 920
 921     print_cert_checks(out, x, checkhost, checkemail, checkip);
 922
 923     if (noout || nocert) {
 924         ret = 0;
 925         goto end;
 926     }
 927
 928     if (outformat == FORMAT_ASN1) {
 929         i = i2d_X509_bio(out, x);
 930     } else if (outformat == FORMAT_PEM) {
 931         if (trustout)
 932             i = PEM_write_bio_X509_AUX(out, x);
 933         else
 934             i = PEM_write_bio_X509(out, x);
 935     } else {
 936         BIO_printf(bio_err, "bad output format specified for outfile\n");
 937         goto end;
 938     }
 939     if (!i) {
 940         BIO_printf(bio_err, "unable to write certificate\n");
 941         ERR_print_errors(bio_err);
 942         goto end;
 943     }
 944     ret = 0;
 945  end:
 946     NCONF_free(extconf);
 947     BIO_free_all(out);
 948     X509_STORE_free(ctx);
 949     X509_NAME_free(fsubj);
 950     X509_REQ_free(req);
 951     X509_free(x);
 952     X509_free(xca);
 953     EVP_PKEY_free(Upkey);
 954     EVP_PKEY_free(CApkey);
 955     EVP_PKEY_free(fkey);
 956     sk_OPENSSL_STRING_free(sigopts);
 957     sk_OPENSSL_STRING_free(vfyopts);
 958     X509_REQ_free(rq);
 959     ASN1_INTEGER_free(sno);
 960     sk_ASN1_OBJECT_pop_free(trust, ASN1_OBJECT_free);
 961     sk_ASN1_OBJECT_pop_free(reject, ASN1_OBJECT_free);
 962     ASN1_OBJECT_free(objtmp);
 963     release_engine(e);
 964     OPENSSL_free(passin);
 965     return ret;
 966 }
 967
 968 static ASN1_INTEGER *x509_load_serial(const char *CAfile,
 969                                       const char *serialfile, int create)
 970 {
 971     char *buf = NULL;
 972     ASN1_INTEGER *bs = NULL;
 973     BIGNUM *serial = NULL;
 974
 975     if (serialfile == NULL) {
 976         const char *p = strrchr(CAfile, '.');
 977         size_t len = p != NULL ? (size_t)(p - CAfile) : strlen(CAfile);
 978
 979         buf = app_malloc(len + sizeof(POSTFIX), "serial# buffer");
 980         memcpy(buf, CAfile, len);
 981         memcpy(buf + len, POSTFIX, sizeof(POSTFIX));
 982         serialfile = buf;
 983     }
 984
 985     serial = load_serial(serialfile, create, NULL);
 986     if (serial == NULL)
 987         goto end;
 988
 989     if (!BN_add_word(serial, 1)) {
 990         BIO_printf(bio_err, "add_word failure\n");
 991         goto end;
 992     }
 993
 994     if (!save_serial(serialfile, NULL, serial, &bs))
 995         goto end;
 996
 997  end:
 998     OPENSSL_free(buf);
 999     BN_free(serial);
1000     return bs;
1001 }
1002
1003 static int x509_certify(X509_STORE *ctx, const char *CAfile, const EVP_MD *digest,
1004                         X509 *x, X509 *xca, EVP_PKEY *pkey,
1005                         STACK_OF(OPENSSL_STRING) *sigopts,
1006                         const char *serialfile, int create,
1007                         int days, int clrext, CONF *conf, const char *section,
1008                         ASN1_INTEGER *sno, int reqfile, int preserve_dates)
1009 {
1010     int ret = 0;
1011     ASN1_INTEGER *bs = NULL;
1012     X509_STORE_CTX *xsc = NULL;
1013     EVP_PKEY *upkey;
1014
1015     upkey = X509_get0_pubkey(xca);
1016     if (upkey == NULL) {
1017         BIO_printf(bio_err, "Error obtaining CA X509 public key\n");
1018         goto end;
1019     }
1020     EVP_PKEY_copy_parameters(upkey, pkey);
1021
1022     xsc = X509_STORE_CTX_new();
1023     if (xsc == NULL || !X509_STORE_CTX_init(xsc, ctx, x, NULL)) {
1024         BIO_printf(bio_err, "Error initialising X509 store\n");
1025         goto end;
1026     }
1027     if (sno)
1028         bs = sno;
1029     else if ((bs = x509_load_serial(CAfile, serialfile, create)) == NULL)
1030         goto end;
1031
1032     /*
1033      * NOTE: this certificate can/should be self-signed, unless it was a
1034      * certificate request in which case it is not.
1035      */
1036     X509_STORE_CTX_set_cert(xsc, x);
1037     X509_STORE_CTX_set_flags(xsc, X509_V_FLAG_CHECK_SS_SIGNATURE);
1038     if (!reqfile && X509_verify_cert(xsc) <= 0)
1039         goto end;
1040
1041     if (!X509_check_private_key(xca, pkey)) {
1042         BIO_printf(bio_err,
1043                    "CA certificate and CA private key do not match\n");
1044         goto end;
1045     }
1046
1047     if (!X509_set_issuer_name(x, X509_get_subject_name(xca)))
1048         goto end;
1049     if (!X509_set_serialNumber(x, bs))
1050         goto end;
1051
1052     if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
1053         goto end;
1054
1055     if (clrext) {
1056         while (X509_get_ext_count(x) > 0)
1057             X509_delete_ext(x, 0);
1058     }
1059
1060     if (conf != NULL) {
1061         X509V3_CTX ctx2;
1062         X509_set_version(x, 2); /* version 3 certificate */
1063         X509V3_set_ctx(&ctx2, xca, x, NULL, NULL, 0);
1064         X509V3_set_nconf(&ctx2, conf);
1065         if (!X509V3_EXT_add_nconf(conf, &ctx2, section, x))
1066             goto end;
1067     }
1068
1069     if (!do_X509_sign(x, pkey, digest, sigopts))
1070         goto end;
1071     ret = 1;
1072  end:
1073     X509_STORE_CTX_free(xsc);
1074     if (!ret)
1075         ERR_print_errors(bio_err);
1076     if (!sno)
1077         ASN1_INTEGER_free(bs);
1078     return ret;
1079 }
1080
1081 static int callb(int ok, X509_STORE_CTX *ctx)
1082 {
1083     int err;
1084     X509 *err_cert;
1085
1086     /*
1087      * It is ok to use a self-signed certificate. This case will catch both
1088      * the initial ok == 0 and the final ok == 1 calls to this function.
1089      */
1090     err = X509_STORE_CTX_get_error(ctx);
1091     if (err == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
1092         return 1;
1093
1094     /*
1095      * BAD we should have gotten an error.  Normally if everything worked
1096      * X509_STORE_CTX_get_error(ctx) will still be set to
1097      * DEPTH_ZERO_SELF_....
1098      */
1099     if (ok) {
1100         BIO_printf(bio_err,
1101                    "error with certificate to be certified - should be self-signed\n");
1102         return 0;
1103     } else {
1104         err_cert = X509_STORE_CTX_get_current_cert(ctx);
1105         print_name(bio_err, NULL, X509_get_subject_name(err_cert), 0);
1106         BIO_printf(bio_err,
1107                    "error with certificate - error %d at depth %d\n%s\n", err,
1108                    X509_STORE_CTX_get_error_depth(ctx),
1109                    X509_verify_cert_error_string(err));
1110         return 1;
1111     }
1112 }
1113
1114 /* self-issue; self-sign unless a forced public key (fkey) is given */
1115 static int sign(X509 *x, EVP_PKEY *pkey, EVP_PKEY *fkey,
1116                 STACK_OF(OPENSSL_STRING) *sigopts,
1117                 int days, int clrext,
1118                 const EVP_MD *digest, CONF *conf, const char *section,
1119                 int preserve_dates)
1120 {
1121     if (!X509_set_issuer_name(x, X509_get_subject_name(x)))
1122         goto err;
1123     if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
1124         goto err;
1125     if (fkey == NULL && !X509_set_pubkey(x, pkey))
1126         goto err;
1127     if (clrext) {
1128         while (X509_get_ext_count(x) > 0)
1129             X509_delete_ext(x, 0);
1130     }
1131     if (conf != NULL) {
1132         X509V3_CTX ctx;
1133         X509_set_version(x, 2); /* version 3 certificate */
1134         X509V3_set_ctx(&ctx, x, x, NULL, NULL, 0);
1135         X509V3_set_nconf(&ctx, conf);
1136         if (!X509V3_EXT_add_nconf(conf, &ctx, section, x))
1137             goto err;
1138     }
1139     if (!do_X509_sign(x, pkey, digest, sigopts))
1140         goto err;
1141     return 1;
1142  err:
1143     ERR_print_errors(bio_err);
1144     return 0;
1145 }
1146
1147 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt)
1148 {
1149     int id, i, idret;
1150     const char *pname;
1151     id = X509_PURPOSE_get_id(pt);
1152     pname = X509_PURPOSE_get0_name(pt);
1153     for (i = 0; i < 2; i++) {
1154         idret = X509_check_purpose(cert, id, i);
1155         BIO_printf(bio, "%s%s : ", pname, i ? " CA" : "");
1156         if (idret == 1)
1157             BIO_printf(bio, "Yes\n");
1158         else if (idret == 0)
1159             BIO_printf(bio, "No\n");
1160         else
1161             BIO_printf(bio, "Yes (WARNING code=%d)\n", idret);
1162     }
1163     return 1;
1164 }
1165
1166 static int parse_ext_names(char *names, const char **result)
1167 {
1168     char *p, *q;
1169     int cnt = 0, len = 0;
1170
1171     p = q = names;
1172     len = strlen(names);
1173
1174     while (q - names <= len) {
1175         if (*q != ',' && *q != '\0') {
1176             q++;
1177             continue;
1178         }
1179         if (p != q) {
1180             /* found */
1181             if (result != NULL) {
1182                 result[cnt] = p;
1183                 *q = '\0';
1184             }
1185             cnt++;
1186         }
1187         p = ++q;
1188     }
1189
1190     return cnt;
1191 }
1192
1193 static int print_x509v3_exts(BIO *bio, X509 *x, const char *ext_names)
1194 {
1195     const STACK_OF(X509_EXTENSION) *exts = NULL;
1196     STACK_OF(X509_EXTENSION) *exts2 = NULL;
1197     X509_EXTENSION *ext = NULL;
1198     ASN1_OBJECT *obj;
1199     int i, j, ret = 0, num, nn = 0;
1200     const char *sn, **names = NULL;
1201     char *tmp_ext_names = NULL;
1202
1203     exts = X509_get0_extensions(x);
1204     if ((num = sk_X509_EXTENSION_num(exts)) <= 0) {
1205         BIO_printf(bio, "No extensions in certificate\n");
1206         ret = 1;
1207         goto end;
1208     }
1209
1210     /* parse comma separated ext name string */
1211     if ((tmp_ext_names = OPENSSL_strdup(ext_names)) == NULL)
1212         goto end;
1213     if ((nn = parse_ext_names(tmp_ext_names, NULL)) == 0) {
1214         BIO_printf(bio, "Invalid extension names: %s\n", ext_names);
1215         goto end;
1216     }
1217     if ((names = OPENSSL_malloc(sizeof(char *) * nn)) == NULL)
1218         goto end;
1219     parse_ext_names(tmp_ext_names, names);
1220
1221     for (i = 0; i < num; i++) {
1222         ext = sk_X509_EXTENSION_value(exts, i);
1223
1224         /* check if this ext is what we want */
1225         obj = X509_EXTENSION_get_object(ext);
1226         sn = OBJ_nid2sn(OBJ_obj2nid(obj));
1227         if (sn == NULL || strcmp(sn, "UNDEF") == 0)
1228             continue;
1229
1230         for (j = 0; j < nn; j++) {
1231             if (strcmp(sn, names[j]) == 0) {
1232                 /* push the extension into a new stack */
1233                 if (exts2 == NULL
1234                     && (exts2 = sk_X509_EXTENSION_new_null()) == NULL)
1235                     goto end;
1236                 if (!sk_X509_EXTENSION_push(exts2, ext))
1237                     goto end;
1238             }
1239         }
1240     }
1241
1242     if (!sk_X509_EXTENSION_num(exts2)) {
1243         BIO_printf(bio, "No extensions matched with %s\n", ext_names);
1244         ret = 1;
1245         goto end;
1246     }
1247
1248     ret = X509V3_extensions_print(bio, NULL, exts2, 0, 0);
1249  end:
1250     sk_X509_EXTENSION_free(exts2);
1251     OPENSSL_free(names);
1252     OPENSSL_free(tmp_ext_names);
1253     return ret;
1254 }