apps/x509.c

   1 /*
   2  * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include "apps.h"
  14 #include "progs.h"
  15 #include <openssl/bio.h>
  16 #include <openssl/asn1.h>
  17 #include <openssl/err.h>
  18 #include <openssl/bn.h>
  19 #include <openssl/evp.h>
  20 #include <openssl/x509.h>
  21 #include <openssl/x509v3.h>
  22 #include <openssl/objects.h>
  23 #include <openssl/pem.h>
  24 #include <openssl/rsa.h>
  25 #ifndef OPENSSL_NO_DSA
  26 # include <openssl/dsa.h>
  27 #endif
  28
  29 #undef POSTFIX
  30 #define POSTFIX ".srl"
  31 #define DEFAULT_DAYS    30 /* default cert validity period in days */
  32 #define UNSET_DAYS      -2 /* -1 is used for testing expiration checks */
  33 #define EXT_COPY_UNSET     -1
  34
  35 static int callb(int ok, X509_STORE_CTX *ctx);
  36 static ASN1_INTEGER *x509_load_serial(const char *CAfile,
  37                                       const char *serialfile, int create);
  38 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt);
  39 static int print_x509v3_exts(BIO *bio, X509 *x, const char *ext_names);
  40
  41 typedef enum OPTION_choice {
  42     OPT_COMMON,
  43     OPT_INFORM, OPT_OUTFORM, OPT_KEYFORM, OPT_REQ, OPT_CAFORM,
  44     OPT_CAKEYFORM, OPT_VFYOPT, OPT_SIGOPT, OPT_DAYS, OPT_PASSIN, OPT_EXTFILE,
  45     OPT_EXTENSIONS, OPT_IN, OPT_OUT, OPT_KEY, OPT_SIGNKEY, OPT_CA, OPT_CAKEY,
  46     OPT_CASERIAL, OPT_SET_SERIAL, OPT_NEW, OPT_FORCE_PUBKEY, OPT_SUBJ,
  47     OPT_ADDTRUST, OPT_ADDREJECT, OPT_SETALIAS, OPT_CERTOPT, OPT_DATEOPT, OPT_NAMEOPT,
  48     OPT_EMAIL, OPT_OCSP_URI, OPT_SERIAL, OPT_NEXT_SERIAL,
  49     OPT_MODULUS, OPT_PUBKEY, OPT_X509TOREQ, OPT_TEXT, OPT_HASH,
  50     OPT_ISSUER_HASH, OPT_SUBJECT, OPT_ISSUER, OPT_FINGERPRINT, OPT_DATES,
  51     OPT_PURPOSE, OPT_STARTDATE, OPT_ENDDATE, OPT_CHECKEND, OPT_CHECKHOST,
  52     OPT_CHECKEMAIL, OPT_CHECKIP, OPT_NOOUT, OPT_TRUSTOUT, OPT_CLRTRUST,
  53     OPT_CLRREJECT, OPT_ALIAS, OPT_CACREATESERIAL, OPT_CLREXT, OPT_OCSPID,
  54     OPT_SUBJECT_HASH_OLD, OPT_ISSUER_HASH_OLD, OPT_COPY_EXTENSIONS,
  55     OPT_BADSIG, OPT_MD, OPT_ENGINE, OPT_NOCERT, OPT_PRESERVE_DATES,
  56     OPT_R_ENUM, OPT_PROV_ENUM, OPT_EXT
  57 } OPTION_CHOICE;
  58
  59 const OPTIONS x509_options[] = {
  60     OPT_SECTION("General"),
  61     {"help", OPT_HELP, '-', "Display this summary"},
  62
  63     {"in", OPT_IN, '<',
  64      "Certificate input, or CSR input file with -req (default stdin)"},
  65     {"passin", OPT_PASSIN, 's', "Private key and cert file pass-phrase source"},
  66     {"new", OPT_NEW, '-', "Generate a certificate from scratch"},
  67     {"x509toreq", OPT_X509TOREQ, '-',
  68      "Output a certification request (rather than a certificate)"},
  69     {"req", OPT_REQ, '-', "Input is a CSR file (rather than a certificate)"},
  70     {"copy_extensions", OPT_COPY_EXTENSIONS, 's',
  71      "copy extensions when converting from CSR to x509 or vice versa"},
  72     {"inform", OPT_INFORM, 'f',
  73      "CSR input file format (DER or PEM) - default PEM"},
  74     {"vfyopt", OPT_VFYOPT, 's', "CSR verification parameter in n:v form"},
  75     {"key", OPT_KEY, 's',
  76      "Key for signing, and to include unless using -force_pubkey"},
  77     {"signkey", OPT_SIGNKEY, 's',
  78      "Same as -key"},
  79     {"keyform", OPT_KEYFORM, 'E',
  80      "Key input format (ENGINE, other values ignored)"},
  81     {"out", OPT_OUT, '>', "Output file - default stdout"},
  82     {"outform", OPT_OUTFORM, 'f',
  83      "Output format (DER or PEM) - default PEM"},
  84     {"nocert", OPT_NOCERT, '-',
  85      "No cert output (except for requested printing)"},
  86     {"noout", OPT_NOOUT, '-', "No output (except for requested printing)"},
  87
  88     OPT_SECTION("Certificate printing"),
  89     {"text", OPT_TEXT, '-', "Print the certificate in text form"},
  90     {"dateopt", OPT_DATEOPT, 's', "Datetime format used for printing. (rfc_822/iso_8601). Default is rfc_822."},
  91     {"certopt", OPT_CERTOPT, 's', "Various certificate text printing options"},
  92     {"fingerprint", OPT_FINGERPRINT, '-', "Print the certificate fingerprint"},
  93     {"alias", OPT_ALIAS, '-', "Print certificate alias"},
  94     {"serial", OPT_SERIAL, '-', "Print serial number value"},
  95     {"startdate", OPT_STARTDATE, '-', "Print the notBefore field"},
  96     {"enddate", OPT_ENDDATE, '-', "Print the notAfter field"},
  97     {"dates", OPT_DATES, '-', "Print both notBefore and notAfter fields"},
  98     {"subject", OPT_SUBJECT, '-', "Print subject DN"},
  99     {"issuer", OPT_ISSUER, '-', "Print issuer DN"},
 100     {"nameopt", OPT_NAMEOPT, 's',
 101      "Certificate subject/issuer name printing options"},
 102     {"email", OPT_EMAIL, '-', "Print email address(es)"},
 103     {"hash", OPT_HASH, '-', "Synonym for -subject_hash (for backward compat)"},
 104     {"subject_hash", OPT_HASH, '-', "Print subject hash value"},
 105 #ifndef OPENSSL_NO_MD5
 106     {"subject_hash_old", OPT_SUBJECT_HASH_OLD, '-',
 107      "Print old-style (MD5) subject hash value"},
 108 #endif
 109     {"issuer_hash", OPT_ISSUER_HASH, '-', "Print issuer hash value"},
 110 #ifndef OPENSSL_NO_MD5
 111     {"issuer_hash_old", OPT_ISSUER_HASH_OLD, '-',
 112      "Print old-style (MD5) issuer hash value"},
 113 #endif
 114     {"ext", OPT_EXT, 's',
 115      "Restrict which X.509 extensions to print and/or copy"},
 116     {"ocspid", OPT_OCSPID, '-',
 117      "Print OCSP hash values for the subject name and public key"},
 118     {"ocsp_uri", OPT_OCSP_URI, '-', "Print OCSP Responder URL(s)"},
 119     {"purpose", OPT_PURPOSE, '-', "Print out certificate purposes"},
 120     {"pubkey", OPT_PUBKEY, '-', "Print the public key in PEM format"},
 121     {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
 122
 123     OPT_SECTION("Certificate checking"),
 124     {"checkend", OPT_CHECKEND, 'M',
 125      "Check whether cert expires in the next arg seconds"},
 126     {OPT_MORE_STR, 1, 1, "Exit 1 (failure) if so, 0 if not"},
 127     {"checkhost", OPT_CHECKHOST, 's', "Check certificate matches host"},
 128     {"checkemail", OPT_CHECKEMAIL, 's', "Check certificate matches email"},
 129     {"checkip", OPT_CHECKIP, 's', "Check certificate matches ipaddr"},
 130
 131     OPT_SECTION("Certificate output"),
 132     {"set_serial", OPT_SET_SERIAL, 's',
 133      "Serial number to use, overrides -CAserial"},
 134     {"next_serial", OPT_NEXT_SERIAL, '-',
 135      "Increment current certificate serial number"},
 136     {"days", OPT_DAYS, 'n',
 137      "Number of days until newly generated certificate expires - default 30"},
 138     {"preserve_dates", OPT_PRESERVE_DATES, '-',
 139      "Preserve existing validity dates"},
 140     {"subj", OPT_SUBJ, 's', "Set or override certificate subject (and issuer)"},
 141     {"force_pubkey", OPT_FORCE_PUBKEY, '<',
 142      "Place the given key in new certificate"},
 143     {"clrext", OPT_CLREXT, '-',
 144      "Do not take over any extensions from the source certificate or request"},
 145     {"extfile", OPT_EXTFILE, '<', "Config file with X509V3 extensions to add"},
 146     {"extensions", OPT_EXTENSIONS, 's',
 147      "Section of extfile to use - default: unnamed section"},
 148     {"sigopt", OPT_SIGOPT, 's', "Signature parameter, in n:v form"},
 149     {"badsig", OPT_BADSIG, '-',
 150      "Corrupt last byte of certificate signature (for test)"},
 151     {"", OPT_MD, '-', "Any supported digest, used for signing and printing"},
 152
 153     OPT_SECTION("Micro-CA"),
 154     {"CA", OPT_CA, '<',
 155      "Use the given CA certificate, conflicts with -key"},
 156     {"CAform", OPT_CAFORM, 'F', "CA cert format (PEM/DER/P12); has no effect"},
 157     {"CAkey", OPT_CAKEY, 's', "The corresponding CA key; default is -CA arg"},
 158     {"CAkeyform", OPT_CAKEYFORM, 'E',
 159      "CA key format (ENGINE, other values ignored)"},
 160     {"CAserial", OPT_CASERIAL, 's',
 161      "File that keeps track of CA-generated serial number"},
 162     {"CAcreateserial", OPT_CACREATESERIAL, '-',
 163      "Create CA serial number file if it does not exist"},
 164
 165     OPT_SECTION("Certificate trust output"),
 166     {"trustout", OPT_TRUSTOUT, '-', "Mark certificate PEM output as trusted"},
 167     {"setalias", OPT_SETALIAS, 's', "Set certificate alias (nickname)"},
 168     {"clrtrust", OPT_CLRTRUST, '-', "Clear all trusted purposes"},
 169     {"addtrust", OPT_ADDTRUST, 's', "Trust certificate for a given purpose"},
 170     {"clrreject", OPT_CLRREJECT, '-',
 171      "Clears all the prohibited or rejected uses of the certificate"},
 172     {"addreject", OPT_ADDREJECT, 's',
 173      "Reject certificate for a given purpose"},
 174
 175     OPT_R_OPTIONS,
 176 #ifndef OPENSSL_NO_ENGINE
 177     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 178 #endif
 179     OPT_PROV_OPTIONS,
 180     {NULL}
 181 };
 182
 183 static void warn_copying(ASN1_OBJECT *excluded, const char *names)
 184 {
 185     const char *sn = OBJ_nid2sn(OBJ_obj2nid(excluded));
 186
 187     if (names != NULL && strstr(names, sn) != NULL)
 188         BIO_printf(bio_err,
 189                    "Warning: -ext should not specify copying %s extension to CSR; ignoring this\n",
 190                    sn);
 191 }
 192
 193 static X509_REQ *x509_to_req(X509 *cert, int ext_copy, const char *names)
 194 {
 195     const STACK_OF(X509_EXTENSION) *cert_exts = X509_get0_extensions(cert);
 196     int i, n = sk_X509_EXTENSION_num(cert_exts /* may be NULL */);
 197     ASN1_OBJECT *skid = OBJ_nid2obj(NID_subject_key_identifier);
 198     ASN1_OBJECT *akid = OBJ_nid2obj(NID_authority_key_identifier);
 199     STACK_OF(X509_EXTENSION) *exts;
 200     X509_REQ *req = X509_to_X509_REQ(cert, NULL, NULL);
 201
 202     if (req == NULL)
 203         return NULL;
 204
 205     /*
 206      * Filter out SKID and AKID extensions, which make no sense in a CSR.
 207      * If names is not NULL, copy only those extensions listed there.
 208      */
 209     warn_copying(skid, names);
 210     warn_copying(akid, names);
 211     if ((exts = sk_X509_EXTENSION_new_reserve(NULL, n)) == NULL)
 212         goto err;
 213     for (i = 0; i < n; i++) {
 214         X509_EXTENSION *ex = sk_X509_EXTENSION_value(cert_exts, i);
 215         ASN1_OBJECT *obj = X509_EXTENSION_get_object(ex);
 216
 217         if (OBJ_cmp(obj, skid) != 0 && OBJ_cmp(obj, akid) != 0
 218                 && !sk_X509_EXTENSION_push(exts, ex))
 219             goto err;
 220     }
 221
 222     if (sk_X509_EXTENSION_num(exts) > 0) {
 223         if (ext_copy != EXT_COPY_UNSET && ext_copy != EXT_COPY_NONE
 224                 && !X509_REQ_add_extensions(req, exts)) {
 225             BIO_printf(bio_err, "Error copying extensions from certificate\n");
 226             goto err;
 227         }
 228     }
 229     sk_X509_EXTENSION_free(exts);
 230     return req;
 231
 232  err:
 233     sk_X509_EXTENSION_free(exts);
 234     X509_REQ_free(req);
 235     return NULL;
 236 }
 237
 238 static int self_signed(X509_STORE *ctx, X509 *cert)
 239 {
 240     X509_STORE_CTX *xsc = X509_STORE_CTX_new();
 241     int ret = 0;
 242
 243     if (xsc == NULL || !X509_STORE_CTX_init(xsc, ctx, cert, NULL)) {
 244         BIO_printf(bio_err, "Error initialising X509 store\n");
 245     } else {
 246         X509_STORE_CTX_set_flags(xsc, X509_V_FLAG_CHECK_SS_SIGNATURE);
 247         ret = X509_verify_cert(xsc) > 0;
 248     }
 249     X509_STORE_CTX_free(xsc);
 250     return ret;
 251 }
 252
 253 int x509_main(int argc, char **argv)
 254 {
 255     ASN1_INTEGER *sno = NULL;
 256     ASN1_OBJECT *objtmp = NULL;
 257     BIO *out = NULL;
 258     CONF *extconf = NULL;
 259     int ext_copy = EXT_COPY_UNSET;
 260     X509V3_CTX ext_ctx;
 261     EVP_PKEY *privkey = NULL, *CAkey = NULL, *pubkey = NULL;
 262     EVP_PKEY *pkey;
 263     int newcert = 0;
 264     char *subj = NULL, *digest = NULL;
 265     X509_NAME *fsubj = NULL;
 266     const unsigned long chtype = MBSTRING_ASC;
 267     const int multirdn = 1;
 268     STACK_OF(ASN1_OBJECT) *trust = NULL, *reject = NULL;
 269     STACK_OF(OPENSSL_STRING) *sigopts = NULL, *vfyopts = NULL;
 270     X509 *x = NULL, *xca = NULL, *issuer_cert;
 271     X509_REQ *req = NULL, *rq = NULL;
 272     X509_STORE *ctx = NULL;
 273     char *CAkeyfile = NULL, *CAserial = NULL, *pubkeyfile = NULL, *alias = NULL;
 274     char *checkhost = NULL, *checkemail = NULL, *checkip = NULL;
 275     char *ext_names = NULL;
 276     char *extsect = NULL, *extfile = NULL, *passin = NULL, *passinarg = NULL;
 277     char *infile = NULL, *outfile = NULL, *privkeyfile = NULL, *CAfile = NULL;
 278     char *prog;
 279     int days = UNSET_DAYS; /* not explicitly set */
 280     int x509toreq = 0, modulus = 0, print_pubkey = 0, pprint = 0;
 281     int CAformat = FORMAT_UNDEF, CAkeyformat = FORMAT_UNDEF;
 282     unsigned long dateopt = ASN1_DTFLGS_RFC822;
 283     int fingerprint = 0, reqfile = 0, checkend = 0;
 284     int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, keyformat = FORMAT_UNDEF;
 285     int next_serial = 0, subject_hash = 0, issuer_hash = 0, ocspid = 0;
 286     int noout = 0, CA_createserial = 0, email = 0;
 287     int ocsp_uri = 0, trustout = 0, clrtrust = 0, clrreject = 0, aliasout = 0;
 288     int ret = 1, i, j, num = 0, badsig = 0, clrext = 0, nocert = 0;
 289     int text = 0, serial = 0, subject = 0, issuer = 0, startdate = 0, ext = 0;
 290     int enddate = 0;
 291     time_t checkoffset = 0;
 292     unsigned long certflag = 0;
 293     int preserve_dates = 0;
 294     OPTION_CHOICE o;
 295     ENGINE *e = NULL;
 296 #ifndef OPENSSL_NO_MD5
 297     int subject_hash_old = 0, issuer_hash_old = 0;
 298 #endif
 299
 300     ctx = X509_STORE_new();
 301     if (ctx == NULL)
 302         goto err;
 303     X509_STORE_set_verify_cb(ctx, callb);
 304
 305     opt_set_unknown_name("digest");
 306     prog = opt_init(argc, argv, x509_options);
 307     while ((o = opt_next()) != OPT_EOF) {
 308         switch (o) {
 309         case OPT_EOF:
 310         case OPT_ERR:
 311  opthelp:
 312             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 313             goto err;
 314         case OPT_HELP:
 315             opt_help(x509_options);
 316             ret = 0;
 317             goto end;
 318         case OPT_INFORM:
 319             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
 320                 goto opthelp;
 321             break;
 322         case OPT_IN:
 323             infile = opt_arg();
 324             break;
 325         case OPT_OUTFORM:
 326             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 327                 goto opthelp;
 328             break;
 329         case OPT_KEYFORM:
 330             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
 331                 goto opthelp;
 332             break;
 333         case OPT_CAFORM:
 334             if (!opt_format(opt_arg(), OPT_FMT_ANY, &CAformat))
 335                 goto opthelp;
 336             break;
 337         case OPT_CAKEYFORM:
 338             if (!opt_format(opt_arg(), OPT_FMT_ANY, &CAkeyformat))
 339                 goto opthelp;
 340             break;
 341         case OPT_OUT:
 342             outfile = opt_arg();
 343             break;
 344         case OPT_REQ:
 345             reqfile = 1;
 346             break;
 347
 348         case OPT_DATEOPT:
 349             if (!set_dateopt(&dateopt, opt_arg())) {
 350                 BIO_printf(bio_err,
 351                            "Invalid date format: %s\n", opt_arg());
 352                 goto err;
 353             }
 354             break;
 355         case OPT_COPY_EXTENSIONS:
 356             if (!set_ext_copy(&ext_copy, opt_arg())) {
 357                 BIO_printf(bio_err,
 358                            "Invalid extension copy option: %s\n", opt_arg());
 359                 goto err;
 360             }
 361             break;
 362
 363         case OPT_SIGOPT:
 364             if (!sigopts)
 365                 sigopts = sk_OPENSSL_STRING_new_null();
 366             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 367                 goto opthelp;
 368             break;
 369         case OPT_VFYOPT:
 370             if (!vfyopts)
 371                 vfyopts = sk_OPENSSL_STRING_new_null();
 372             if (!vfyopts || !sk_OPENSSL_STRING_push(vfyopts, opt_arg()))
 373                 goto opthelp;
 374             break;
 375         case OPT_DAYS:
 376             days = atoi(opt_arg());
 377             if (days < -1) {
 378                 BIO_printf(bio_err, "%s: -days parameter arg must be >= -1\n",
 379                            prog);
 380                 goto err;
 381             }
 382             break;
 383         case OPT_PASSIN:
 384             passinarg = opt_arg();
 385             break;
 386         case OPT_EXTFILE:
 387             extfile = opt_arg();
 388             break;
 389         case OPT_R_CASES:
 390             if (!opt_rand(o))
 391                 goto end;
 392             break;
 393         case OPT_PROV_CASES:
 394             if (!opt_provider(o))
 395                 goto end;
 396             break;
 397         case OPT_EXTENSIONS:
 398             extsect = opt_arg();
 399             break;
 400         case OPT_KEY:
 401         case OPT_SIGNKEY:
 402             privkeyfile = opt_arg();
 403             break;
 404         case OPT_CA:
 405             CAfile = opt_arg();
 406             break;
 407         case OPT_CAKEY:
 408             CAkeyfile = opt_arg();
 409             break;
 410         case OPT_CASERIAL:
 411             CAserial = opt_arg();
 412             break;
 413         case OPT_SET_SERIAL:
 414             if (sno != NULL) {
 415                 BIO_printf(bio_err, "Serial number supplied twice\n");
 416                 goto opthelp;
 417             }
 418             if ((sno = s2i_ASN1_INTEGER(NULL, opt_arg())) == NULL)
 419                 goto opthelp;
 420             break;
 421         case OPT_NEW:
 422             newcert = 1;
 423             break;
 424         case OPT_FORCE_PUBKEY:
 425             pubkeyfile = opt_arg();
 426             break;
 427         case OPT_SUBJ:
 428             subj = opt_arg();
 429             break;
 430         case OPT_ADDTRUST:
 431             if (trust == NULL && (trust = sk_ASN1_OBJECT_new_null()) == NULL)
 432                 goto end;
 433             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 434                 BIO_printf(bio_err, "%s: Invalid trust object value %s\n",
 435                            prog, opt_arg());
 436                 goto opthelp;
 437             }
 438             sk_ASN1_OBJECT_push(trust, objtmp);
 439             trustout = 1;
 440             break;
 441         case OPT_ADDREJECT:
 442             if (reject == NULL && (reject = sk_ASN1_OBJECT_new_null()) == NULL)
 443                 goto end;
 444             if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
 445                 BIO_printf(bio_err, "%s: Invalid reject object value %s\n",
 446                            prog, opt_arg());
 447                 goto opthelp;
 448             }
 449             sk_ASN1_OBJECT_push(reject, objtmp);
 450             trustout = 1;
 451             break;
 452         case OPT_SETALIAS:
 453             alias = opt_arg();
 454             trustout = 1;
 455             break;
 456         case OPT_CERTOPT:
 457             if (!set_cert_ex(&certflag, opt_arg()))
 458                 goto opthelp;
 459             break;
 460         case OPT_NAMEOPT:
 461             if (!set_nameopt(opt_arg()))
 462                 goto opthelp;
 463             break;
 464         case OPT_ENGINE:
 465             e = setup_engine(opt_arg(), 0);
 466             break;
 467         case OPT_EMAIL:
 468             email = ++num;
 469             break;
 470         case OPT_OCSP_URI:
 471             ocsp_uri = ++num;
 472             break;
 473         case OPT_SERIAL:
 474             serial = ++num;
 475             break;
 476         case OPT_NEXT_SERIAL:
 477             next_serial = ++num;
 478             break;
 479         case OPT_MODULUS:
 480             modulus = ++num;
 481             break;
 482         case OPT_PUBKEY:
 483             print_pubkey = ++num;
 484             break;
 485         case OPT_X509TOREQ:
 486             x509toreq = 1;
 487             break;
 488         case OPT_TEXT:
 489             text = ++num;
 490             break;
 491         case OPT_SUBJECT:
 492             subject = ++num;
 493             break;
 494         case OPT_ISSUER:
 495             issuer = ++num;
 496             break;
 497         case OPT_FINGERPRINT:
 498             fingerprint = ++num;
 499             break;
 500         case OPT_HASH:
 501             subject_hash = ++num;
 502             break;
 503         case OPT_ISSUER_HASH:
 504             issuer_hash = ++num;
 505             break;
 506         case OPT_PURPOSE:
 507             pprint = ++num;
 508             break;
 509         case OPT_STARTDATE:
 510             startdate = ++num;
 511             break;
 512         case OPT_ENDDATE:
 513             enddate = ++num;
 514             break;
 515         case OPT_NOOUT:
 516             noout = ++num;
 517             break;
 518         case OPT_EXT:
 519             ext = ++num;
 520             ext_names = opt_arg();
 521             break;
 522         case OPT_NOCERT:
 523             nocert = 1;
 524             break;
 525         case OPT_TRUSTOUT:
 526             trustout = 1;
 527             break;
 528         case OPT_CLRTRUST:
 529             clrtrust = ++num;
 530             break;
 531         case OPT_CLRREJECT:
 532             clrreject = ++num;
 533             break;
 534         case OPT_ALIAS:
 535             aliasout = ++num;
 536             break;
 537         case OPT_CACREATESERIAL:
 538             CA_createserial = ++num;
 539             break;
 540         case OPT_CLREXT:
 541             clrext = 1;
 542             break;
 543         case OPT_OCSPID:
 544             ocspid = ++num;
 545             break;
 546         case OPT_BADSIG:
 547             badsig = 1;
 548             break;
 549 #ifndef OPENSSL_NO_MD5
 550         case OPT_SUBJECT_HASH_OLD:
 551             subject_hash_old = ++num;
 552             break;
 553         case OPT_ISSUER_HASH_OLD:
 554             issuer_hash_old = ++num;
 555             break;
 556 #else
 557         case OPT_SUBJECT_HASH_OLD:
 558         case OPT_ISSUER_HASH_OLD:
 559             break;
 560 #endif
 561         case OPT_DATES:
 562             startdate = ++num;
 563             enddate = ++num;
 564             break;
 565         case OPT_CHECKEND:
 566             checkend = 1;
 567             {
 568                 ossl_intmax_t temp = 0;
 569                 if (!opt_intmax(opt_arg(), &temp))
 570                     goto opthelp;
 571                 checkoffset = (time_t)temp;
 572                 if ((ossl_intmax_t)checkoffset != temp) {
 573                     BIO_printf(bio_err, "%s: Checkend time out of range %s\n",
 574                                prog, opt_arg());
 575                     goto opthelp;
 576                 }
 577             }
 578             break;
 579         case OPT_CHECKHOST:
 580             checkhost = opt_arg();
 581             break;
 582         case OPT_CHECKEMAIL:
 583             checkemail = opt_arg();
 584             break;
 585         case OPT_CHECKIP:
 586             checkip = opt_arg();
 587             break;
 588         case OPT_PRESERVE_DATES:
 589             preserve_dates = 1;
 590             break;
 591         case OPT_MD:
 592             digest = opt_unknown();
 593             break;
 594         }
 595     }
 596     /* No extra arguments. */
 597     if (!opt_check_rest_arg(NULL))
 598         goto opthelp;
 599
 600     if (!app_RAND_load())
 601         goto end;
 602
 603     if (!opt_check_md(digest))
 604         goto opthelp;
 605
 606     if (preserve_dates && days != UNSET_DAYS) {
 607         BIO_printf(bio_err, "Cannot use -preserve_dates with -days option\n");
 608         goto err;
 609     }
 610     if (days == UNSET_DAYS)
 611         days = DEFAULT_DAYS;
 612
 613     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 614         BIO_printf(bio_err, "Error getting password\n");
 615         goto err;
 616     }
 617
 618     if (!X509_STORE_set_default_paths_ex(ctx, app_get0_libctx(),
 619                                          app_get0_propq()))
 620         goto end;
 621
 622     if (newcert && infile != NULL) {
 623         BIO_printf(bio_err, "The -in option cannot be used with -new\n");
 624         goto err;
 625     }
 626     if (newcert && reqfile) {
 627         BIO_printf(bio_err,
 628                    "The -req option cannot be used with -new\n");
 629         goto err;
 630     }
 631     if (privkeyfile != NULL) {
 632         privkey = load_key(privkeyfile, keyformat, 0, passin, e, "private key");
 633         if (privkey == NULL)
 634             goto end;
 635     }
 636     if (pubkeyfile != NULL) {
 637         if ((pubkey = load_pubkey(pubkeyfile, keyformat, 0, NULL, e,
 638                                   "explicitly set public key")) == NULL)
 639             goto end;
 640     }
 641
 642     if (newcert) {
 643         if (subj == NULL) {
 644             BIO_printf(bio_err,
 645                        "The -new option requires a subject to be set using -subj\n");
 646             goto err;
 647         }
 648         if (privkeyfile == NULL && pubkeyfile == NULL) {
 649             BIO_printf(bio_err,
 650                        "The -new option requires using the -key or -force_pubkey option\n");
 651             goto err;
 652         }
 653     }
 654     if (subj != NULL
 655             && (fsubj = parse_name(subj, chtype, multirdn, "subject")) == NULL)
 656         goto end;
 657
 658     if (CAkeyfile == NULL)
 659         CAkeyfile = CAfile;
 660     if (CAfile != NULL) {
 661         if (privkeyfile != NULL) {
 662             BIO_printf(bio_err, "Cannot use both -key/-signkey and -CA option\n");
 663             goto err;
 664         }
 665     } else if (CAkeyfile != NULL) {
 666         BIO_printf(bio_err,
 667                    "Warning: ignoring -CAkey option since no -CA option is given\n");
 668     }
 669
 670     if (extfile == NULL) {
 671         if (extsect != NULL)
 672             BIO_printf(bio_err,
 673                        "Warning: ignoring -extensions option without -extfile\n");
 674     } else {
 675         X509V3_CTX ctx2;
 676
 677         if ((extconf = app_load_config(extfile)) == NULL)
 678             goto end;
 679         if (extsect == NULL) {
 680             extsect = NCONF_get_string(extconf, "default", "extensions");
 681             if (extsect == NULL) {
 682                 ERR_clear_error();
 683                 extsect = "default";
 684             }
 685         }
 686         X509V3_set_ctx_test(&ctx2);
 687         X509V3_set_nconf(&ctx2, extconf);
 688         if (!X509V3_EXT_add_nconf(extconf, &ctx2, extsect, NULL)) {
 689             BIO_printf(bio_err,
 690                        "Error checking extension section %s\n", extsect);
 691             goto err;
 692         }
 693     }
 694
 695     if (reqfile) {
 696         if (infile == NULL)
 697             BIO_printf(bio_err,
 698                        "Warning: Reading cert request from stdin since no -in option is given\n");
 699         req = load_csr(infile, informat, "certificate request input");
 700         if (req == NULL)
 701             goto end;
 702
 703         if ((pkey = X509_REQ_get0_pubkey(req)) == NULL) {
 704             BIO_printf(bio_err, "Error unpacking public key from CSR\n");
 705             goto err;
 706         }
 707         i = do_X509_REQ_verify(req, pkey, vfyopts);
 708         if (i <= 0) {
 709             BIO_printf(bio_err, i < 0
 710                        ? "Error while verifying certificate request self-signature\n"
 711                        : "Certificate request self-signature did not match the contents\n");
 712             goto err;
 713         }
 714         BIO_printf(bio_err, "Certificate request self-signature ok\n");
 715
 716         print_name(bio_err, "subject=", X509_REQ_get_subject_name(req));
 717     } else if (!x509toreq && ext_copy != EXT_COPY_UNSET) {
 718         BIO_printf(bio_err, "Warning: ignoring -copy_extensions since neither -x509toreq nor -req is given\n");
 719     }
 720
 721     if (reqfile || newcert) {
 722         if (preserve_dates)
 723             BIO_printf(bio_err,
 724                        "Warning: ignoring -preserve_dates option with -req or -new\n");
 725         preserve_dates = 0;
 726         if (privkeyfile == NULL && CAkeyfile == NULL) {
 727             BIO_printf(bio_err,
 728                        "We need a private key to sign with, use -key or -CAkey or -CA with private key\n");
 729             goto err;
 730         }
 731         if ((x = X509_new_ex(app_get0_libctx(), app_get0_propq())) == NULL)
 732             goto end;
 733         if (sno == NULL) {
 734             sno = ASN1_INTEGER_new();
 735             if (sno == NULL || !rand_serial(NULL, sno))
 736                 goto end;
 737         }
 738         if (req != NULL && ext_copy != EXT_COPY_UNSET) {
 739             if (clrext && ext_copy != EXT_COPY_NONE) {
 740                 BIO_printf(bio_err, "Must not use -clrext together with -copy_extensions\n");
 741                 goto err;
 742             } else if (!copy_extensions(x, req, ext_copy)) {
 743                 BIO_printf(bio_err, "Error copying extensions from request\n");
 744                 goto err;
 745             }
 746         }
 747     } else {
 748         if (infile == NULL)
 749             BIO_printf(bio_err,
 750                        "Warning: Reading certificate from stdin since no -in option is given\n");
 751         x = load_cert_pass(infile, informat, 1, passin, "certificate");
 752         if (x == NULL)
 753             goto end;
 754     }
 755     if ((fsubj != NULL || req != NULL)
 756         && !X509_set_subject_name(x, fsubj != NULL ? fsubj :
 757                                   X509_REQ_get_subject_name(req)))
 758         goto end;
 759     if ((pubkey != NULL || privkey != NULL || req != NULL)
 760         && !X509_set_pubkey(x, pubkey != NULL ? pubkey :
 761                             privkey != NULL ? privkey :
 762                             X509_REQ_get0_pubkey(req)))
 763         goto end;
 764
 765     if (CAfile != NULL) {
 766         xca = load_cert_pass(CAfile, CAformat, 1, passin, "CA certificate");
 767         if (xca == NULL)
 768             goto end;
 769     }
 770
 771     out = bio_open_default(outfile, 'w', outformat);
 772     if (out == NULL)
 773         goto end;
 774
 775     if (!noout || text || next_serial)
 776         OBJ_create("2.99999.3", "SET.ex3", "SET x509v3 extension 3");
 777
 778     if (alias)
 779         X509_alias_set1(x, (unsigned char *)alias, -1);
 780
 781     if (clrtrust)
 782         X509_trust_clear(x);
 783     if (clrreject)
 784         X509_reject_clear(x);
 785
 786     if (trust != NULL) {
 787         for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++)
 788             X509_add1_trust_object(x, sk_ASN1_OBJECT_value(trust, i));
 789     }
 790
 791     if (reject != NULL) {
 792         for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++)
 793             X509_add1_reject_object(x, sk_ASN1_OBJECT_value(reject, i));
 794     }
 795
 796     if (clrext && ext_names != NULL)
 797         BIO_printf(bio_err, "Warning: Ignoring -ext since -clrext is given\n");
 798     for (i = X509_get_ext_count(x) - 1; i >= 0; i--) {
 799         X509_EXTENSION *ex = X509_get_ext(x, i);
 800         const char *sn = OBJ_nid2sn(OBJ_obj2nid(X509_EXTENSION_get_object(ex)));
 801
 802         if (clrext || (ext_names != NULL && strstr(ext_names, sn) == NULL))
 803             X509_EXTENSION_free(X509_delete_ext(x, i));
 804     }
 805
 806     issuer_cert = x;
 807     if (CAfile != NULL) {
 808         issuer_cert = xca;
 809         if (sno == NULL)
 810             sno = x509_load_serial(CAfile, CAserial, CA_createserial);
 811         if (sno == NULL)
 812             goto end;
 813         if (!x509toreq && !reqfile && !newcert && !self_signed(ctx, x))
 814             goto end;
 815     } else {
 816         if (privkey != NULL && !cert_matches_key(x, privkey))
 817             BIO_printf(bio_err,
 818                        "Warning: Signature key and public key of cert do not match\n");
 819     }
 820
 821     if (sno != NULL && !X509_set_serialNumber(x, sno))
 822         goto end;
 823
 824     if (reqfile || newcert || privkey != NULL || CAfile != NULL) {
 825         if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
 826             goto end;
 827         if (!X509_set_issuer_name(x, X509_get_subject_name(issuer_cert)))
 828             goto end;
 829     }
 830
 831     X509V3_set_ctx(&ext_ctx, issuer_cert, x, NULL, NULL, X509V3_CTX_REPLACE);
 832     /* prepare fallback for AKID, but only if issuer cert equals subject cert */
 833     if (CAfile == NULL) {
 834         if (!X509V3_set_issuer_pkey(&ext_ctx, privkey))
 835             goto end;
 836     }
 837     if (extconf != NULL && !x509toreq) {
 838         X509V3_set_nconf(&ext_ctx, extconf);
 839         if (!X509V3_EXT_add_nconf(extconf, &ext_ctx, extsect, x)) {
 840             BIO_printf(bio_err,
 841                        "Error adding extensions from section %s\n", extsect);
 842             goto err;
 843         }
 844     }
 845
 846     /* At this point the contents of the certificate x have been finished. */
 847
 848     pkey = X509_get0_pubkey(x);
 849     if ((print_pubkey != 0 || modulus != 0) && pkey == NULL) {
 850         BIO_printf(bio_err, "Error getting public key\n");
 851         goto err;
 852     }
 853
 854     if (x509toreq) { /* also works in conjunction with -req */
 855         if (privkey == NULL) {
 856             BIO_printf(bio_err, "Must specify request signing key using -key\n");
 857             goto err;
 858         }
 859         if (clrext && ext_copy != EXT_COPY_NONE) {
 860             BIO_printf(bio_err, "Must not use -clrext together with -copy_extensions\n");
 861             goto err;
 862         }
 863         if ((rq = x509_to_req(x, ext_copy, ext_names)) == NULL)
 864             goto end;
 865         if (extconf != NULL) {
 866             X509V3_set_nconf(&ext_ctx, extconf);
 867             if (!X509V3_EXT_REQ_add_nconf(extconf, &ext_ctx, extsect, rq)) {
 868                 BIO_printf(bio_err,
 869                            "Error adding request extensions from section %s\n", extsect);
 870                 goto err;
 871             }
 872         }
 873         if (!do_X509_REQ_sign(rq, privkey, digest, sigopts))
 874             goto end;
 875         if (!noout) {
 876             if (outformat == FORMAT_ASN1) {
 877                 X509_REQ_print_ex(out, rq, get_nameopt(), X509_FLAG_COMPAT);
 878                 i = i2d_X509_bio(out, x);
 879             } else {
 880                 i = PEM_write_bio_X509_REQ(out, rq);
 881             }
 882             if (!i) {
 883                 BIO_printf(bio_err,
 884                            "Unable to write certificate request\n");
 885                 goto err;
 886             }
 887         }
 888         noout = 1;
 889     } else if (privkey != NULL) {
 890         if (!do_X509_sign(x, privkey, digest, sigopts, &ext_ctx))
 891             goto end;
 892     } else if (CAfile != NULL) {
 893         if ((CAkey = load_key(CAkeyfile, CAkeyformat,
 894                               0, passin, e, "CA private key")) == NULL)
 895             goto end;
 896         if (!X509_check_private_key(xca, CAkey)) {
 897             BIO_printf(bio_err,
 898                        "CA certificate and CA private key do not match\n");
 899             goto err;
 900         }
 901
 902         if (!do_X509_sign(x, CAkey, digest, sigopts, &ext_ctx))
 903             goto end;
 904     }
 905     if (badsig) {
 906         const ASN1_BIT_STRING *signature;
 907
 908         X509_get0_signature(&signature, NULL, x);
 909         corrupt_signature(signature);
 910     }
 911
 912     /* Process print options in the given order, as indicated by index i */
 913     for (i = 1; i <= num; i++) {
 914         if (i == issuer) {
 915             print_name(out, "issuer=", X509_get_issuer_name(x));
 916         } else if (i == subject) {
 917             print_name(out, "subject=", X509_get_subject_name(x));
 918         } else if (i == serial) {
 919             BIO_printf(out, "serial=");
 920             i2a_ASN1_INTEGER(out, X509_get0_serialNumber(x));
 921             BIO_printf(out, "\n");
 922         } else if (i == next_serial) {
 923             ASN1_INTEGER *ser;
 924             BIGNUM *bnser = ASN1_INTEGER_to_BN(X509_get0_serialNumber(x), NULL);
 925
 926             if (bnser == NULL)
 927                 goto end;
 928             if (!BN_add_word(bnser, 1)
 929                     || (ser = BN_to_ASN1_INTEGER(bnser, NULL)) == NULL) {
 930                 BN_free(bnser);
 931                 goto end;
 932             }
 933             BN_free(bnser);
 934             i2a_ASN1_INTEGER(out, ser);
 935             ASN1_INTEGER_free(ser);
 936             BIO_puts(out, "\n");
 937         } else if (i == email || i == ocsp_uri) {
 938             STACK_OF(OPENSSL_STRING) *emlst =
 939                 i == email ? X509_get1_email(x) : X509_get1_ocsp(x);
 940
 941             for (j = 0; j < sk_OPENSSL_STRING_num(emlst); j++)
 942                 BIO_printf(out, "%s\n", sk_OPENSSL_STRING_value(emlst, j));
 943             X509_email_free(emlst);
 944         } else if (i == aliasout) {
 945             unsigned char *alstr = X509_alias_get0(x, NULL);
 946
 947             if (alstr)
 948                 BIO_printf(out, "%s\n", alstr);
 949             else
 950                 BIO_puts(out, "<No Alias>\n");
 951         } else if (i == subject_hash) {
 952             BIO_printf(out, "%08lx\n", X509_subject_name_hash(x));
 953 #ifndef OPENSSL_NO_MD5
 954         } else if (i == subject_hash_old) {
 955             BIO_printf(out, "%08lx\n", X509_subject_name_hash_old(x));
 956 #endif
 957         } else if (i == issuer_hash) {
 958             BIO_printf(out, "%08lx\n", X509_issuer_name_hash(x));
 959 #ifndef OPENSSL_NO_MD5
 960         } else if (i == issuer_hash_old) {
 961             BIO_printf(out, "%08lx\n", X509_issuer_name_hash_old(x));
 962 #endif
 963         } else if (i == pprint) {
 964             BIO_printf(out, "Certificate purposes:\n");
 965             for (j = 0; j < X509_PURPOSE_get_count(); j++)
 966                 purpose_print(out, x, X509_PURPOSE_get0(j));
 967         } else if (i == modulus) {
 968             BIO_printf(out, "Modulus=");
 969             if (EVP_PKEY_is_a(pkey, "RSA") || EVP_PKEY_is_a(pkey, "RSA-PSS")) {
 970                 BIGNUM *n = NULL;
 971
 972                 /* Every RSA key has an 'n' */
 973                 EVP_PKEY_get_bn_param(pkey, "n", &n);
 974                 BN_print(out, n);
 975                 BN_free(n);
 976             } else if (EVP_PKEY_is_a(pkey, "DSA")) {
 977                 BIGNUM *dsapub = NULL;
 978
 979                 /* Every DSA key has a 'pub' */
 980                 EVP_PKEY_get_bn_param(pkey, "pub", &dsapub);
 981                 BN_print(out, dsapub);
 982                 BN_free(dsapub);
 983             } else {
 984                 BIO_printf(out, "No modulus for this public key type");
 985             }
 986             BIO_printf(out, "\n");
 987         } else if (i == print_pubkey) {
 988             PEM_write_bio_PUBKEY(out, pkey);
 989         } else if (i == text) {
 990             X509_print_ex(out, x, get_nameopt(), certflag);
 991         } else if (i == startdate) {
 992             BIO_puts(out, "notBefore=");
 993             ASN1_TIME_print_ex(out, X509_get0_notBefore(x), dateopt);
 994             BIO_puts(out, "\n");
 995         } else if (i == enddate) {
 996             BIO_puts(out, "notAfter=");
 997             ASN1_TIME_print_ex(out, X509_get0_notAfter(x), dateopt);
 998             BIO_puts(out, "\n");
 999         } else if (i == fingerprint) {
1000             unsigned int n;
1001             unsigned char md[EVP_MAX_MD_SIZE];
1002             const char *fdigname = digest;
1003             EVP_MD *fdig;
1004             int digres;
1005
1006             if (fdigname == NULL)
1007                 fdigname = "SHA1";
1008
1009             if ((fdig = EVP_MD_fetch(app_get0_libctx(), fdigname,
1010                                      app_get0_propq())) == NULL) {
1011                 BIO_printf(bio_err, "Unknown digest\n");
1012                 goto err;
1013             }
1014             digres = X509_digest(x, fdig, md, &n);
1015             EVP_MD_free(fdig);
1016             if (!digres) {
1017                 BIO_printf(bio_err, "Out of memory\n");
1018                 goto err;
1019             }
1020
1021             BIO_printf(out, "%s Fingerprint=", fdigname);
1022             for (j = 0; j < (int)n; j++)
1023                 BIO_printf(out, "%02X%c", md[j], (j + 1 == (int)n) ? '\n' : ':');
1024         } else if (i == ocspid) {
1025             X509_ocspid_print(out, x);
1026         } else if (i == ext) {
1027             print_x509v3_exts(out, x, ext_names);
1028         }
1029     }
1030
1031     if (checkend) {
1032         time_t tcheck = time(NULL) + checkoffset;
1033
1034         ret = X509_cmp_time(X509_get0_notAfter(x), &tcheck) < 0;
1035         if (ret)
1036             BIO_printf(out, "Certificate will expire\n");
1037         else
1038             BIO_printf(out, "Certificate will not expire\n");
1039         goto end;
1040     }
1041
1042     if (!check_cert_attributes(out, x, checkhost, checkemail, checkip, 1))
1043         goto err;
1044
1045     if (noout || nocert) {
1046         ret = 0;
1047         goto end;
1048     }
1049
1050     if (outformat == FORMAT_ASN1) {
1051         i = i2d_X509_bio(out, x);
1052     } else if (outformat == FORMAT_PEM) {
1053         if (trustout)
1054             i = PEM_write_bio_X509_AUX(out, x);
1055         else
1056             i = PEM_write_bio_X509(out, x);
1057     } else {
1058         BIO_printf(bio_err, "Bad output format specified for outfile\n");
1059         goto err;
1060     }
1061     if (!i) {
1062         BIO_printf(bio_err, "Unable to write certificate\n");
1063         goto err;
1064     }
1065
1066     ret = 0;
1067     goto end;
1068
1069  err:
1070     ERR_print_errors(bio_err);
1071
1072  end:
1073     NCONF_free(extconf);
1074     BIO_free_all(out);
1075     X509_STORE_free(ctx);
1076     X509_NAME_free(fsubj);
1077     X509_REQ_free(req);
1078     X509_free(x);
1079     X509_free(xca);
1080     EVP_PKEY_free(privkey);
1081     EVP_PKEY_free(CAkey);
1082     EVP_PKEY_free(pubkey);
1083     sk_OPENSSL_STRING_free(sigopts);
1084     sk_OPENSSL_STRING_free(vfyopts);
1085     X509_REQ_free(rq);
1086     ASN1_INTEGER_free(sno);
1087     sk_ASN1_OBJECT_pop_free(trust, ASN1_OBJECT_free);
1088     sk_ASN1_OBJECT_pop_free(reject, ASN1_OBJECT_free);
1089     release_engine(e);
1090     clear_free(passin);
1091     return ret;
1092 }
1093
1094 static ASN1_INTEGER *x509_load_serial(const char *CAfile,
1095                                       const char *serialfile, int create)
1096 {
1097     char *buf = NULL;
1098     ASN1_INTEGER *bs = NULL;
1099     BIGNUM *serial = NULL;
1100
1101     if (serialfile == NULL) {
1102         const char *p = strrchr(CAfile, '.');
1103         size_t len = p != NULL ? (size_t)(p - CAfile) : strlen(CAfile);
1104
1105         buf = app_malloc(len + sizeof(POSTFIX), "serial# buffer");
1106         memcpy(buf, CAfile, len);
1107         memcpy(buf + len, POSTFIX, sizeof(POSTFIX));
1108         serialfile = buf;
1109     }
1110
1111     serial = load_serial(serialfile, create, NULL);
1112     if (serial == NULL)
1113         goto end;
1114
1115     if (!BN_add_word(serial, 1)) {
1116         BIO_printf(bio_err, "Serial number increment failure\n");
1117         goto end;
1118     }
1119
1120     if (!save_serial(serialfile, NULL, serial, &bs))
1121         goto end;
1122
1123  end:
1124     OPENSSL_free(buf);
1125     BN_free(serial);
1126     return bs;
1127 }
1128
1129 static int callb(int ok, X509_STORE_CTX *ctx)
1130 {
1131     int err;
1132     X509 *err_cert;
1133
1134     /*
1135      * It is ok to use a self-signed certificate. This case will catch both
1136      * the initial ok == 0 and the final ok == 1 calls to this function.
1137      */
1138     err = X509_STORE_CTX_get_error(ctx);
1139     if (err == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
1140         return 1;
1141
1142     /*
1143      * BAD we should have gotten an error.  Normally if everything worked
1144      * X509_STORE_CTX_get_error(ctx) will still be set to
1145      * DEPTH_ZERO_SELF_....
1146      */
1147     if (ok) {
1148         BIO_printf(bio_err,
1149                    "Error with certificate to be certified - should be self-signed\n");
1150         return 0;
1151     } else {
1152         err_cert = X509_STORE_CTX_get_current_cert(ctx);
1153         print_name(bio_err, "subject=", X509_get_subject_name(err_cert));
1154         BIO_printf(bio_err,
1155                    "Error with certificate - error %d at depth %d\n%s\n", err,
1156                    X509_STORE_CTX_get_error_depth(ctx),
1157                    X509_verify_cert_error_string(err));
1158         return 1;
1159     }
1160 }
1161
1162 static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt)
1163 {
1164     int id, i, idret;
1165     const char *pname;
1166     id = X509_PURPOSE_get_id(pt);
1167     pname = X509_PURPOSE_get0_name(pt);
1168     for (i = 0; i < 2; i++) {
1169         idret = X509_check_purpose(cert, id, i);
1170         BIO_printf(bio, "%s%s : ", pname, i ? " CA" : "");
1171         if (idret == 1)
1172             BIO_printf(bio, "Yes\n");
1173         else if (idret == 0)
1174             BIO_printf(bio, "No\n");
1175         else
1176             BIO_printf(bio, "Yes (WARNING code=%d)\n", idret);
1177     }
1178     return 1;
1179 }
1180
1181 static int parse_ext_names(char *names, const char **result)
1182 {
1183     char *p, *q;
1184     int cnt = 0, len = 0;
1185
1186     p = q = names;
1187     len = strlen(names);
1188
1189     while (q - names <= len) {
1190         if (*q != ',' && *q != '\0') {
1191             q++;
1192             continue;
1193         }
1194         if (p != q) {
1195             /* found */
1196             if (result != NULL) {
1197                 result[cnt] = p;
1198                 *q = '\0';
1199             }
1200             cnt++;
1201         }
1202         p = ++q;
1203     }
1204
1205     return cnt;
1206 }
1207
1208 static int print_x509v3_exts(BIO *bio, X509 *x, const char *ext_names)
1209 {
1210     const STACK_OF(X509_EXTENSION) *exts = NULL;
1211     STACK_OF(X509_EXTENSION) *exts2 = NULL;
1212     X509_EXTENSION *ext = NULL;
1213     ASN1_OBJECT *obj;
1214     int i, j, ret = 0, num, nn = 0;
1215     const char *sn, **names = NULL;
1216     char *tmp_ext_names = NULL;
1217
1218     exts = X509_get0_extensions(x);
1219     if ((num = sk_X509_EXTENSION_num(exts)) <= 0) {
1220         BIO_printf(bio_err, "No extensions in certificate\n");
1221         ret = 1;
1222         goto end;
1223     }
1224
1225     /* parse comma separated ext name string */
1226     if ((tmp_ext_names = OPENSSL_strdup(ext_names)) == NULL)
1227         goto end;
1228     if ((nn = parse_ext_names(tmp_ext_names, NULL)) == 0) {
1229         BIO_printf(bio, "Invalid extension names: %s\n", ext_names);
1230         goto end;
1231     }
1232     if ((names = OPENSSL_malloc(sizeof(char *) * nn)) == NULL)
1233         goto end;
1234     parse_ext_names(tmp_ext_names, names);
1235
1236     for (i = 0; i < num; i++) {
1237         ext = sk_X509_EXTENSION_value(exts, i);
1238
1239         /* check if this ext is what we want */
1240         obj = X509_EXTENSION_get_object(ext);
1241         sn = OBJ_nid2sn(OBJ_obj2nid(obj));
1242         if (sn == NULL || strcmp(sn, "UNDEF") == 0)
1243             continue;
1244
1245         for (j = 0; j < nn; j++) {
1246             if (strcmp(sn, names[j]) == 0) {
1247                 /* push the extension into a new stack */
1248                 if (exts2 == NULL
1249                     && (exts2 = sk_X509_EXTENSION_new_null()) == NULL)
1250                     goto end;
1251                 if (!sk_X509_EXTENSION_push(exts2, ext))
1252                     goto end;
1253             }
1254         }
1255     }
1256
1257     if (!sk_X509_EXTENSION_num(exts2)) {
1258         BIO_printf(bio, "No extensions matched with %s\n", ext_names);
1259         ret = 1;
1260         goto end;
1261     }
1262
1263     ret = X509V3_extensions_print(bio, NULL, exts2, 0, 0);
1264  end:
1265     sk_X509_EXTENSION_free(exts2);
1266     OPENSSL_free(names);
1267     OPENSSL_free(tmp_ext_names);
1268     return ret;
1269 }