text: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   * All rights reserved.
   *
   * This package is an SSL implementation written
   * by Eric Young (eay@cryptsoft.com).
   * The implementation was written so as to conform with Netscapes SSL.
   *
   * This library is free for commercial and non-commercial use as long as
   * the following conditions are aheared to.  The following conditions
   * apply to all code found in this distribution, be it the RC4, RSA,
   * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
   * included with this distribution is covered by the same copyright terms
   * except that the holder is Tim Hudson (tjh@cryptsoft.com).
   *
   * Copyright remains Eric Young's, and as such any Copyright notices in
   * the code are not to be removed.
   * If this package is used in a product, Eric Young should be given attribution
   * as the author of the parts of the library used.
   * This can be in the form of a textual message at program startup or
   * in documentation (online or textual) provided with the package.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *    "This product includes cryptographic software written by
   *     Eric Young (eay@cryptsoft.com)"
   *    The word 'cryptographic' can be left out if the rouines from the library
   *    being used are not cryptographic related :-).
   * 4. If you include any Windows specific code (or a derivative thereof) from
   *    the apps directory (application code) you must include an acknowledgement:
   *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
   *
   * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * The licence and distribution terms for any publically available version or
   * derivative of this code cannot be changed.  i.e. this code cannot simply be
   * copied and put under another distribution licence
   * [including the GNU Public Licence.]
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include "apps.h"
  #include <openssl/bio.h>
  #include <openssl/asn1.h>
  #include <openssl/err.h>
  #include <openssl/bn.h>
  #include <openssl/evp.h>
  #include <openssl/x509.h>
  #include <openssl/x509v3.h>
  #include <openssl/objects.h>
  #include <openssl/pem.h>
  #ifndef OPENSSL_NO_RSA
  # include <openssl/rsa.h>
  #endif
  #ifndef OPENSSL_NO_DSA
  # include <openssl/dsa.h>
  #endif
  
  #undef POSTFIX
  #define POSTFIX ".srl"
  #define DEF_DAYS        30
  
  static int callb(int ok, X509_STORE_CTX *ctx);
  static int sign(X509 *x, EVP_PKEY *pkey, int days, int clrext,
                  const EVP_MD *digest, CONF *conf, char *section);
  static int x509_certify(X509_STORE *ctx, char *CAfile, const EVP_MD *digest,
                          X509 *x, X509 *xca, EVP_PKEY *pkey,
                          STACK_OF(OPENSSL_STRING) *sigopts, char *serial,
                          int create, int days, int clrext, CONF *conf,
                          char *section, ASN1_INTEGER *sno, int reqfile);
  static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt);
  
  typedef enum OPTION_choice {
      OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
      OPT_INFORM, OPT_OUTFORM, OPT_KEYFORM, OPT_REQ, OPT_CAFORM,
      OPT_CAKEYFORM, OPT_SIGOPT, OPT_DAYS, OPT_PASSIN, OPT_EXTFILE,
      OPT_EXTENSIONS, OPT_IN, OPT_OUT, OPT_SIGNKEY, OPT_CA,
      OPT_CAKEY, OPT_CASERIAL, OPT_SET_SERIAL, OPT_FORCE_PUBKEY,
      OPT_ADDTRUST, OPT_ADDREJECT, OPT_SETALIAS, OPT_CERTOPT, OPT_NAMEOPT,
      OPT_C, OPT_EMAIL, OPT_OCSP_URI, OPT_SERIAL, OPT_NEXT_SERIAL,
      OPT_MODULUS, OPT_PUBKEY, OPT_X509TOREQ, OPT_TEXT, OPT_HASH,
      OPT_ISSUER_HASH, OPT_SUBJECT, OPT_ISSUER, OPT_FINGERPRINT, OPT_DATES,
      OPT_PURPOSE, OPT_STARTDATE, OPT_ENDDATE, OPT_CHECKEND, OPT_CHECKHOST,
      OPT_CHECKEMAIL, OPT_CHECKIP, OPT_NOOUT, OPT_TRUSTOUT, OPT_CLRTRUST,
      OPT_CLRREJECT, OPT_ALIAS, OPT_CACREATESERIAL, OPT_CLREXT, OPT_OCSPID,
      OPT_SUBJECT_HASH_OLD,
      OPT_ISSUER_HASH_OLD,
      OPT_BADSIG, OPT_MD, OPT_ENGINE, OPT_NOCERT
  } OPTION_CHOICE;
  
  OPTIONS x509_options[] = {
      {"help", OPT_HELP, '-', "Display this summary"},
      {"inform", OPT_INFORM, 'f',
       "Input format - default PEM (one of DER, NET or PEM)"},
      {"in", OPT_IN, '<', "Input file - default stdin"},
      {"outform", OPT_OUTFORM, 'f',
       "Output format - default PEM (one of DER, NET or PEM)"},
      {"out", OPT_OUT, '>', "Output file - default stdout"},
      {"keyform", OPT_KEYFORM, 'F', "Private key format - default PEM"},
      {"passin", OPT_PASSIN, 's', "Private key password source"},
      {"serial", OPT_SERIAL, '-', "Print serial number value"},
      {"subject_hash", OPT_HASH, '-', "Print subject hash value"},
      {"issuer_hash", OPT_ISSUER_HASH, '-', "Print issuer hash value"},
      {"hash", OPT_HASH, '-', "Synonym for -subject_hash"},
      {"subject", OPT_SUBJECT, '-', "Print subject DN"},
      {"issuer", OPT_ISSUER, '-', "Print issuer DN"},
      {"email", OPT_EMAIL, '-', "Print email address(es)"},
      {"startdate", OPT_STARTDATE, '-', "Set notBefore field"},
      {"enddate", OPT_ENDDATE, '-', "Set notAfter field"},
      {"purpose", OPT_PURPOSE, '-', "Print out certificate purposes"},
      {"dates", OPT_DATES, '-', "Both Before and After dates"},
      {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
      {"pubkey", OPT_PUBKEY, '-', "Output the public key"},
      {"fingerprint", OPT_FINGERPRINT, '-',
       "Print the certificate fingerprint"},
      {"alias", OPT_ALIAS, '-', "Output certificate alias"},
      {"noout", OPT_NOOUT, '-', "No output, just status"},
      {"nocert", OPT_NOCERT, '-', "No certificate output"},
      {"ocspid", OPT_OCSPID, '-',
       "Print OCSP hash values for the subject name and public key"},
      {"ocsp_uri", OPT_OCSP_URI, '-', "Print OCSP Responder URL(s)"},
      {"trustout", OPT_TRUSTOUT, '-', "Output a trusted certificate"},
      {"clrtrust", OPT_CLRTRUST, '-', "Clear all trusted purposes"},
      {"clrext", OPT_CLREXT, '-', "Clear all rejected purposes"},
      {"addtrust", OPT_ADDTRUST, 's', "Trust certificate for a given purpose"},
      {"addreject", OPT_ADDREJECT, 's',
       "Reject certificate for a given purpose"},
      {"setalias", OPT_SETALIAS, 's', "Set certificate alias"},
      {"days", OPT_DAYS, 'n',
       "How long till expiry of a signed certificate - def 30 days"},
      {"checkend", OPT_CHECKEND, 'M',
       "Check whether the cert expires in the next arg seconds"},
      {OPT_MORE_STR, 1, 1, "Exit 1 if so, 0 if not"},
      {"signkey", OPT_SIGNKEY, '<', "Self sign cert with arg"},
      {"x509toreq", OPT_X509TOREQ, '-',
       "Output a certification request object"},
      {"req", OPT_REQ, '-', "Input is a certificate request, sign and output"},
      {"CA", OPT_CA, '<', "Set the CA certificate, must be PEM format"},
      {"CAkey", OPT_CAKEY, 's',
       "The CA key, must be PEM format; if not in CAfile"},
      {"CAcreateserial", OPT_CACREATESERIAL, '-',
       "Create serial number file if it does not exist"},
      {"CAserial", OPT_CASERIAL, 's', "Serial file"},
      {"set_serial", OPT_SET_SERIAL, 's', "Serial number to use"},
      {"text", OPT_TEXT, '-', "Print the certificate in text form"},
      {"C", OPT_C, '-', "Print out C code forms"},
      {"extfile", OPT_EXTFILE, '<', "File with X509V3 extensions to add"},
      {"extensions", OPT_EXTENSIONS, 's', "Section from config file to use"},
      {"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"},
      {"certopt", OPT_CERTOPT, 's', "Various certificate text options"},
      {"checkhost", OPT_CHECKHOST, 's', "Check certificate matches host"},
      {"checkemail", OPT_CHECKEMAIL, 's', "Check certificate matches email"},
      {"checkip", OPT_CHECKIP, 's', "Check certificate matches ipaddr"},
      {"CAform", OPT_CAFORM, 'F', "CA format - default PEM"},
      {"CAkeyform", OPT_CAKEYFORM, 'F', "CA key format - default PEM"},
      {"sigopt", OPT_SIGOPT, 's'},
      {"force_pubkey", OPT_FORCE_PUBKEY, '<'},
      {"next_serial", OPT_NEXT_SERIAL, '-'},
      {"clrreject", OPT_CLRREJECT, '-'},
      {"badsig", OPT_BADSIG, '-'},
      {"", OPT_MD, '-', "Any supported digest"},
  #ifndef OPENSSL_NO_MD5
      {"subject_hash_old", OPT_SUBJECT_HASH_OLD, '-',
       "Print old-style (MD5) issuer hash value"},
      {"issuer_hash_old", OPT_ISSUER_HASH_OLD, '-',
       "Print old-style (MD5) subject hash value"},
  #endif
  #ifndef OPENSSL_NO_ENGINE
      {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  #endif
      {NULL}
  };
  
  int x509_main(int argc, char **argv)
  {
      ASN1_INTEGER *sno = NULL;
      ASN1_OBJECT *objtmp;
      BIO *out = NULL;
      CONF *extconf = NULL;
      EVP_PKEY *Upkey = NULL, *CApkey = NULL, *fkey = NULL;
      STACK_OF(ASN1_OBJECT) *trust = NULL, *reject = NULL;
      STACK_OF(OPENSSL_STRING) *sigopts = NULL;
      X509 *x = NULL, *xca = NULL;
      X509_REQ *req = NULL, *rq = NULL;
      X509_STORE *ctx = NULL;
      const EVP_MD *digest = NULL;
      char *CAkeyfile = NULL, *CAserial = NULL, *fkeyfile = NULL, *alias = NULL;
      char *checkhost = NULL, *checkemail = NULL, *checkip = NULL;
      char *extsect = NULL, *extfile = NULL, *passin = NULL, *passinarg = NULL;
      char *infile = NULL, *outfile = NULL, *keyfile = NULL, *CAfile = NULL;
      char buf[256], *prog;
      int x509req = 0, days = DEF_DAYS, modulus = 0, pubkey = 0, pprint = 0;
      int C = 0, CAformat = FORMAT_PEM, CAkeyformat = FORMAT_PEM;
      int fingerprint = 0, reqfile = 0, need_rand = 0, checkend = 0;
      int informat = FORMAT_PEM, outformat = FORMAT_PEM, keyformat = FORMAT_PEM;
      int next_serial = 0, subject_hash = 0, issuer_hash = 0, ocspid = 0;
      int noout = 0, sign_flag = 0, CA_flag = 0, CA_createserial = 0, email = 0;
      int ocsp_uri = 0, trustout = 0, clrtrust = 0, clrreject = 0, aliasout = 0;
      int ret = 1, i, num = 0, badsig = 0, clrext = 0, nocert = 0;
      int text = 0, serial = 0, subject = 0, issuer = 0, startdate = 0;
      int enddate = 0;
      time_t checkoffset = 0;
      unsigned long nmflag = 0, certflag = 0;
      char nmflag_set = 0;
      OPTION_CHOICE o;
      ENGINE *e = NULL;
  #ifndef OPENSSL_NO_MD5
      int subject_hash_old = 0, issuer_hash_old = 0;
  #endif
  
      ctx = X509_STORE_new();
      if (ctx == NULL)
          goto end;
      X509_STORE_set_verify_cb(ctx, callb);
  
      prog = opt_init(argc, argv, x509_options);
      while ((o = opt_next()) != OPT_EOF) {
          switch (o) {
          case OPT_EOF:
          case OPT_ERR:
   opthelp:
              BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
              goto end;
          case OPT_HELP:
              opt_help(x509_options);
              ret = 0;
              goto end;
          case OPT_INFORM:
              if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
                  goto opthelp;
              break;
          case OPT_IN:
              infile = opt_arg();
              break;
          case OPT_OUTFORM:
              if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
                  goto opthelp;
              break;
          case OPT_KEYFORM:
              if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &keyformat))
                  goto opthelp;
              break;
          case OPT_CAFORM:
              if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &CAformat))
                  goto opthelp;
              break;
          case OPT_CAKEYFORM:
              if (!opt_format(opt_arg(), OPT_FMT_ANY, &CAkeyformat))
                  goto opthelp;
              break;
          case OPT_OUT:
              outfile = opt_arg();
              break;
          case OPT_REQ:
              reqfile = need_rand = 1;
              break;
  
          case OPT_SIGOPT:
              if (!sigopts)
                  sigopts = sk_OPENSSL_STRING_new_null();
              if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
                  goto opthelp;
              break;
          case OPT_DAYS:
              days = atoi(opt_arg());
              break;
          case OPT_PASSIN:
              passinarg = opt_arg();
              break;
          case OPT_EXTFILE:
              extfile = opt_arg();
              break;
          case OPT_EXTENSIONS:
              extsect = opt_arg();
              break;
          case OPT_SIGNKEY:
              keyfile = opt_arg();
              sign_flag = ++num;
              need_rand = 1;
              break;
          case OPT_CA:
              CAfile = opt_arg();
              CA_flag = ++num;
              need_rand = 1;
              break;
          case OPT_CAKEY:
              CAkeyfile = opt_arg();
              break;
          case OPT_CASERIAL:
              CAserial = opt_arg();
              break;
          case OPT_SET_SERIAL:
              if ((sno = s2i_ASN1_INTEGER(NULL, opt_arg())) == NULL)
                  goto opthelp;
              break;
          case OPT_FORCE_PUBKEY:
              fkeyfile = opt_arg();
              break;
          case OPT_ADDTRUST:
              if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
                  BIO_printf(bio_err,
                             "%s: Invalid trust object value %s\n",
                             prog, opt_arg());
                  goto opthelp;
              }
              if (trust == NULL && (trust = sk_ASN1_OBJECT_new_null()) == NULL)
                  goto end;
              sk_ASN1_OBJECT_push(trust, objtmp);
              trustout = 1;
              break;
          case OPT_ADDREJECT:
              if ((objtmp = OBJ_txt2obj(opt_arg(), 0)) == NULL) {
                  BIO_printf(bio_err,
                             "%s: Invalid reject object value %s\n",
                             prog, opt_arg());
                  goto opthelp;
              }
              if (reject == NULL
                  && (reject = sk_ASN1_OBJECT_new_null()) == NULL)
                  goto end;
              sk_ASN1_OBJECT_push(reject, objtmp);
              trustout = 1;
              break;
          case OPT_SETALIAS:
              alias = opt_arg();
              trustout = 1;
              break;
          case OPT_CERTOPT:
              if (!set_cert_ex(&certflag, opt_arg()))
                  goto opthelp;
              break;
          case OPT_NAMEOPT:
              nmflag_set = 1;
              if (!set_name_ex(&nmflag, opt_arg()))
                  goto opthelp;
              break;
          case OPT_ENGINE:
              e = setup_engine(opt_arg(), 0);
              break;
          case OPT_C:
              C = ++num;
              break;
          case OPT_EMAIL:
              email = ++num;
              break;
          case OPT_OCSP_URI:
              ocsp_uri = ++num;
              break;
          case OPT_SERIAL:
              serial = ++num;
              break;
          case OPT_NEXT_SERIAL:
              next_serial = ++num;
              break;
          case OPT_MODULUS:
              modulus = ++num;
              break;
          case OPT_PUBKEY:
              pubkey = ++num;
              break;
          case OPT_X509TOREQ:
              x509req = ++num;
              break;
          case OPT_TEXT:
              text = ++num;
              break;
          case OPT_SUBJECT:
              subject = ++num;
              break;
          case OPT_ISSUER:
              issuer = ++num;
              break;
          case OPT_FINGERPRINT:
              fingerprint = ++num;
              break;
          case OPT_HASH:
              subject_hash = ++num;
              break;
          case OPT_ISSUER_HASH:
              issuer_hash = ++num;
              break;
          case OPT_PURPOSE:
              pprint = ++num;
              break;
          case OPT_STARTDATE:
              startdate = ++num;
              break;
          case OPT_ENDDATE:
              enddate = ++num;
              break;
          case OPT_NOOUT:
              noout = ++num;
              break;
          case OPT_NOCERT:
              nocert = 1;
              break;
          case OPT_TRUSTOUT:
              trustout = 1;
              break;
          case OPT_CLRTRUST:
              clrtrust = ++num;
              break;
          case OPT_CLRREJECT:
              clrreject = ++num;
              break;
          case OPT_ALIAS:
              aliasout = ++num;
              break;
          case OPT_CACREATESERIAL:
              CA_createserial = ++num;
              break;
          case OPT_CLREXT:
              clrext = 1;
              break;
          case OPT_OCSPID:
              ocspid = ++num;
              break;
          case OPT_BADSIG:
              badsig = 1;
              break;
  #ifndef OPENSSL_NO_MD5
          case OPT_SUBJECT_HASH_OLD:
              subject_hash_old = ++num;
              break;
          case OPT_ISSUER_HASH_OLD:
              issuer_hash_old = ++num;
              break;
  #else
          case OPT_SUBJECT_HASH_OLD:
          case OPT_ISSUER_HASH_OLD:
              break;
  #endif
          case OPT_DATES:
              startdate = ++num;
              enddate = ++num;
              break;
          case OPT_CHECKEND:
              checkend = 1;
              {
                  intmax_t temp = 0;
                  if (!opt_imax(opt_arg(), &temp))
                      goto opthelp;
                  checkoffset = (time_t)temp;
                  if ((intmax_t)checkoffset != temp) {
                      BIO_printf(bio_err, "%s: checkend time out of range %s\n",
                                 prog, opt_arg());
                      goto opthelp;
                  }
              }
              break;
          case OPT_CHECKHOST:
              checkhost = opt_arg();
              break;
          case OPT_CHECKEMAIL:
              checkemail = opt_arg();
              break;
          case OPT_CHECKIP:
              checkip = opt_arg();
              break;
          case OPT_MD:
              if (!opt_md(opt_unknown(), &digest))
                  goto opthelp;
          }
      }
      argc = opt_num_rest();
      argv = opt_rest();
      if (argc != 0) {
          BIO_printf(bio_err, "%s: Unknown parameter %s\n", prog, argv[0]);
          goto opthelp;
      }
  
      if (!nmflag_set)
          nmflag = XN_FLAG_ONELINE;
  
      out = bio_open_default(outfile, 'w', outformat);
      if (out == NULL)
          goto end;
  
      if (need_rand)
          app_RAND_load_file(NULL, 0);
  
      if (!app_passwd(passinarg, NULL, &passin, NULL)) {
          BIO_printf(bio_err, "Error getting password\n");
          goto end;
      }
  
      if (!X509_STORE_set_default_paths(ctx)) {
          ERR_print_errors(bio_err);
          goto end;
      }
  
      if (fkeyfile) {
          fkey = load_pubkey(fkeyfile, keyformat, 0, NULL, e, "Forced key");
          if (fkey == NULL)
              goto end;
      }
  
      if ((CAkeyfile == NULL) && (CA_flag) && (CAformat == FORMAT_PEM)) {
          CAkeyfile = CAfile;
      } else if ((CA_flag) && (CAkeyfile == NULL)) {
          BIO_printf(bio_err,
                     "need to specify a CAkey if using the CA command\n");
          goto end;
      }
  
      if (extfile) {
          X509V3_CTX ctx2;
          if ((extconf = app_load_config(extfile)) == NULL)
              goto end;
          if (!extsect) {
              extsect = NCONF_get_string(extconf, "default", "extensions");
              if (!extsect) {
                  ERR_clear_error();
                  extsect = "default";
              }
          }
          X509V3_set_ctx_test(&ctx2);
          X509V3_set_nconf(&ctx2, extconf);
          if (!X509V3_EXT_add_nconf(extconf, &ctx2, extsect, NULL)) {
              BIO_printf(bio_err,
                         "Error Loading extension section %s\n", extsect);
              ERR_print_errors(bio_err);
              goto end;
          }
      }
  
      if (reqfile) {
          EVP_PKEY *pkey;
          BIO *in;
  
          if (!sign_flag && !CA_flag) {
              BIO_printf(bio_err, "We need a private key to sign with\n");
              goto end;
          }
          in = bio_open_default(infile, 'r', informat);
          if (in == NULL)
              goto end;
          req = PEM_read_bio_X509_REQ(in, NULL, NULL, NULL);
          BIO_free(in);
  
          if (req == NULL) {
              ERR_print_errors(bio_err);
              goto end;
          }
  
          if ((pkey = X509_REQ_get_pubkey(req)) == NULL) {
              BIO_printf(bio_err, "error unpacking public key\n");
              goto end;
          }
          i = X509_REQ_verify(req, pkey);
          EVP_PKEY_free(pkey);
          if (i < 0) {
              BIO_printf(bio_err, "Signature verification error\n");
              ERR_print_errors(bio_err);
              goto end;
          }
          if (i == 0) {
              BIO_printf(bio_err,
                         "Signature did not match the certificate request\n");
              goto end;
          } else
              BIO_printf(bio_err, "Signature ok\n");
  
          print_name(bio_err, "subject=", X509_REQ_get_subject_name(req),
                     nmflag);
  
          if ((x = X509_new()) == NULL)
              goto end;
  
          if (sno == NULL) {
              sno = ASN1_INTEGER_new();
              if (sno == NULL || !rand_serial(NULL, sno))
                  goto end;
              if (!X509_set_serialNumber(x, sno))
                  goto end;
              ASN1_INTEGER_free(sno);
              sno = NULL;
          } else if (!X509_set_serialNumber(x, sno))
              goto end;
  
          if (!X509_set_issuer_name(x, X509_REQ_get_subject_name(req)))
              goto end;
          if (!X509_set_subject_name(x, X509_REQ_get_subject_name(req)))
              goto end;
  
          X509_gmtime_adj(X509_get_notBefore(x), 0);
          X509_time_adj_ex(X509_get_notAfter(x), days, 0, NULL);
          if (fkey)
              X509_set_pubkey(x, fkey);
          else {
              pkey = X509_REQ_get_pubkey(req);
              X509_set_pubkey(x, pkey);
              EVP_PKEY_free(pkey);
          }
      } else
          x = load_cert(infile, informat, "Certificate");
  
      if (x == NULL)
          goto end;
      if (CA_flag) {
          xca = load_cert(CAfile, CAformat, "CA Certificate");
          if (xca == NULL)
              goto end;
      }
  
      if (!noout || text || next_serial) {
          OBJ_create("2.99999.3", "SET.ex3", "SET x509v3 extension 3");
  
      }
  
      if (alias)
          X509_alias_set1(x, (unsigned char *)alias, -1);
  
      if (clrtrust)
          X509_trust_clear(x);
      if (clrreject)
          X509_reject_clear(x);
  
      if (trust) {
          for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++) {
              objtmp = sk_ASN1_OBJECT_value(trust, i);
              X509_add1_trust_object(x, objtmp);
          }
      }
  
      if (reject) {
          for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++) {
              objtmp = sk_ASN1_OBJECT_value(reject, i);
              X509_add1_reject_object(x, objtmp);
          }
      }
  
      if (num) {
          for (i = 1; i <= num; i++) {
              if (issuer == i) {
                  print_name(out, "issuer= ", X509_get_issuer_name(x), nmflag);
              } else if (subject == i) {
                  print_name(out, "subject= ",
                             X509_get_subject_name(x), nmflag);
              } else if (serial == i) {
                  BIO_printf(out, "serial=");
                  i2a_ASN1_INTEGER(out, X509_get_serialNumber(x));
                  BIO_printf(out, "\n");
              } else if (next_serial == i) {
                  BIGNUM *bnser;
                  ASN1_INTEGER *ser;
                  ser = X509_get_serialNumber(x);
                  bnser = ASN1_INTEGER_to_BN(ser, NULL);
                  if (!bnser)
                      goto end;
                  if (!BN_add_word(bnser, 1))
                      goto end;
                  ser = BN_to_ASN1_INTEGER(bnser, NULL);
                  if (!ser)
                      goto end;
                  BN_free(bnser);
                  i2a_ASN1_INTEGER(out, ser);
                  ASN1_INTEGER_free(ser);
                  BIO_puts(out, "\n");
              } else if ((email == i) || (ocsp_uri == i)) {
                  int j;
                  STACK_OF(OPENSSL_STRING) *emlst;
                  if (email == i)
                      emlst = X509_get1_email(x);
                  else
                      emlst = X509_get1_ocsp(x);
                  for (j = 0; j < sk_OPENSSL_STRING_num(emlst); j++)
                      BIO_printf(out, "%s\n",
                                 sk_OPENSSL_STRING_value(emlst, j));
                  X509_email_free(emlst);
              } else if (aliasout == i) {
                  unsigned char *alstr;
                  alstr = X509_alias_get0(x, NULL);
                  if (alstr)
                      BIO_printf(out, "%s\n", alstr);
                  else
                      BIO_puts(out, "<No Alias>\n");
              } else if (subject_hash == i) {
                  BIO_printf(out, "%08lx\n", X509_subject_name_hash(x));
              }
  #ifndef OPENSSL_NO_MD5
              else if (subject_hash_old == i) {
                  BIO_printf(out, "%08lx\n", X509_subject_name_hash_old(x));
              }
  #endif
              else if (issuer_hash == i) {
                  BIO_printf(out, "%08lx\n", X509_issuer_name_hash(x));
              }
  #ifndef OPENSSL_NO_MD5
              else if (issuer_hash_old == i) {
                  BIO_printf(out, "%08lx\n", X509_issuer_name_hash_old(x));
              }
  #endif
              else if (pprint == i) {
                  X509_PURPOSE *ptmp;
                  int j;
                  BIO_printf(out, "Certificate purposes:\n");
                  for (j = 0; j < X509_PURPOSE_get_count(); j++) {
                      ptmp = X509_PURPOSE_get0(j);
                      purpose_print(out, x, ptmp);
                  }
              } else if (modulus == i) {
                  EVP_PKEY *pkey;
  
                  pkey = X509_get0_pubkey(x);
                  if (pkey == NULL) {
                      BIO_printf(bio_err, "Modulus=unavailable\n");
                      ERR_print_errors(bio_err);
                      goto end;
                  }
                  BIO_printf(out, "Modulus=");
  #ifndef OPENSSL_NO_RSA
                  if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA)
                      BN_print(out, EVP_PKEY_get0_RSA(pkey)->n);
                  else
  #endif
  #ifndef OPENSSL_NO_DSA
                  if (EVP_PKEY_id(pkey) == EVP_PKEY_DSA)
                      BN_print(out, EVP_PKEY_get0_DSA(pkey)->pub_key);
                  else
  #endif
                      BIO_printf(out, "Wrong Algorithm type");
                  BIO_printf(out, "\n");
              } else if (pubkey == i) {
                  EVP_PKEY *pkey;
  
                  pkey = X509_get0_pubkey(x);
                  if (pkey == NULL) {
                      BIO_printf(bio_err, "Error getting public key\n");
                      ERR_print_errors(bio_err);
                      goto end;
                  }
                  PEM_write_bio_PUBKEY(out, pkey);
              } else if (C == i) {
                  unsigned char *d;
                  char *m;
                  int len;
  
                  X509_NAME_oneline(X509_get_subject_name(x), buf, sizeof buf);
                  BIO_printf(out, "/*\n"
                                  " * Subject: %s\n", buf);
  
                  m = X509_NAME_oneline(X509_get_issuer_name(x), buf, sizeof buf);
                  BIO_printf(out, " * Issuer:  %s\n"
                                  " */\n", buf);
  
                  len = i2d_X509(x, NULL);
                  m = app_malloc(len, "x509 name buffer");
                  d = (unsigned char *)m;
                  len = i2d_X509_NAME(X509_get_subject_name(x), &d);
                  print_array(out, "the_subject_name", len, (unsigned char *)m);
                  d = (unsigned char *)m;
                  len = i2d_X509_PUBKEY(X509_get_X509_PUBKEY(x), &d);
                  print_array(out, "the_public_key", len, (unsigned char *)m);
                  d = (unsigned char *)m;
                  len = i2d_X509(x, &d);
                  print_array(out, "the_certificate", len, (unsigned char *)m);
                  OPENSSL_free(m);
              } else if (text == i) {
                  X509_print_ex(out, x, nmflag, certflag);
              } else if (startdate == i) {
                  BIO_puts(out, "notBefore=");
                  ASN1_TIME_print(out, X509_get_notBefore(x));
                  BIO_puts(out, "\n");
              } else if (enddate == i) {
                  BIO_puts(out, "notAfter=");
                  ASN1_TIME_print(out, X509_get_notAfter(x));
                  BIO_puts(out, "\n");
              } else if (fingerprint == i) {
                  int j;
                  unsigned int n;
                  unsigned char md[EVP_MAX_MD_SIZE];
                  const EVP_MD *fdig = digest;
  
                  if (!fdig)
                      fdig = EVP_sha1();
  
                  if (!X509_digest(x, fdig, md, &n)) {
                      BIO_printf(bio_err, "out of memory\n");
                      goto end;
                  }
                  BIO_printf(out, "%s Fingerprint=",
                             OBJ_nid2sn(EVP_MD_type(fdig)));
                  for (j = 0; j < (int)n; j++) {
                      BIO_printf(out, "%02X%c", md[j], (j + 1 == (int)n)
                                 ? '\n' : ':');
                  }
              }
  
              /* should be in the library */
              else if ((sign_flag == i) && (x509req == 0)) {
                  BIO_printf(bio_err, "Getting Private key\n");
                  if (Upkey == NULL) {
                      Upkey = load_key(keyfile, keyformat, 0,
                                       passin, e, "Private key");
                      if (Upkey == NULL)
                          goto end;
                  }
  
                  assert(need_rand);
                  if (!sign(x, Upkey, days, clrext, digest, extconf, extsect))
                      goto end;
              } else if (CA_flag == i) {
                  BIO_printf(bio_err, "Getting CA Private Key\n");
                  if (CAkeyfile != NULL) {
                      CApkey = load_key(CAkeyfile, CAkeyformat,
                                        0, passin, e, "CA Private Key");
                      if (CApkey == NULL)
                          goto end;
                  }
  
                  assert(need_rand);
                  if (!x509_certify(ctx, CAfile, digest, x, xca,
                                    CApkey, sigopts,
                                    CAserial, CA_createserial, days, clrext,
                                    extconf, extsect, sno, reqfile))
                      goto end;
              } else if (x509req == i) {
                  EVP_PKEY *pk;
  
                  BIO_printf(bio_err, "Getting request Private Key\n");
                  if (keyfile == NULL) {
                      BIO_printf(bio_err, "no request key file specified\n");
                      goto end;
                  } else {
                      pk = load_key(keyfile, keyformat, 0,
                                    passin, e, "request key");
                      if (pk == NULL)
                          goto end;
                  }
  
                  BIO_printf(bio_err, "Generating certificate request\n");
  
                  rq = X509_to_X509_REQ(x, pk, digest);
                  EVP_PKEY_free(pk);
                  if (rq == NULL) {
                      ERR_print_errors(bio_err);
                      goto end;
                  }
                  if (!noout) {
                      X509_REQ_print(out, rq);
                      PEM_write_bio_X509_REQ(out, rq);
                  }
                  noout = 1;
              } else if (ocspid == i) {
                  X509_ocspid_print(out, x);
              }
          }
      }
  
      if (checkend) {
          time_t tcheck = time(NULL) + checkoffset;
  
          if (X509_cmp_time(X509_get_notAfter(x), &tcheck) < 0) {
              BIO_printf(out, "Certificate will expire\n");
              ret = 1;
          } else {
              BIO_printf(out, "Certificate will not expire\n");
              ret = 0;
          }
          goto end;
      }
  
      print_cert_checks(out, x, checkhost, checkemail, checkip);
  
      if (noout || nocert) {
          ret = 0;
          goto end;
      }
  
      if (badsig) {
          ASN1_BIT_STRING *signature;
          unsigned char *s;
          X509_get0_signature(&signature, NULL, x);
          s = ASN1_STRING_data(signature);
          s[ASN1_STRING_length(signature) - 1] ^= 0x1;
      }
  
      if (outformat == FORMAT_ASN1)
          i = i2d_X509_bio(out, x);
      else if (outformat == FORMAT_PEM) {
          if (trustout)
              i = PEM_write_bio_X509_AUX(out, x);
          else
              i = PEM_write_bio_X509(out, x);
      } else {
          BIO_printf(bio_err, "bad output format specified for outfile\n");
          goto end;
      }
      if (!i) {
          BIO_printf(bio_err, "unable to write certificate\n");
          ERR_print_errors(bio_err);
          goto end;
      }
      ret = 0;
   end:
      if (need_rand)
          app_RAND_write_file(NULL);
      OBJ_cleanup();
      NCONF_free(extconf);
      BIO_free_all(out);
      X509_STORE_free(ctx);
      X509_REQ_free(req);
      X509_free(x);
      X509_free(xca);
      EVP_PKEY_free(Upkey);
      EVP_PKEY_free(CApkey);
      EVP_PKEY_free(fkey);
      sk_OPENSSL_STRING_free(sigopts);
      X509_REQ_free(rq);
      ASN1_INTEGER_free(sno);
      sk_ASN1_OBJECT_pop_free(trust, ASN1_OBJECT_free);
      sk_ASN1_OBJECT_pop_free(reject, ASN1_OBJECT_free);
      OPENSSL_free(passin);
      return (ret);
  }
  
  static ASN1_INTEGER *x509_load_serial(char *CAfile, char *serialfile,
                                        int create)
  {
      char *buf = NULL, *p;
      ASN1_INTEGER *bs = NULL;
      BIGNUM *serial = NULL;
      size_t len;
  
      len = ((serialfile == NULL)
             ? (strlen(CAfile) + strlen(POSTFIX) + 1)
             : (strlen(serialfile))) + 1;
      buf = app_malloc(len, "serial# buffer");
      if (serialfile == NULL) {
          OPENSSL_strlcpy(buf, CAfile, len);
          for (p = buf; *p; p++)
              if (*p == '.') {
                  *p = '\0';
                  break;
              }
          OPENSSL_strlcat(buf, POSTFIX, len);
      } else
          OPENSSL_strlcpy(buf, serialfile, len);
  
      serial = load_serial(buf, create, NULL);
      if (serial == NULL)
          goto end;
  
      if (!BN_add_word(serial, 1)) {
          BIO_printf(bio_err, "add_word failure\n");
          goto end;
      }
  
      if (!save_serial(buf, NULL, serial, &bs))
          goto end;
  
   end:
      OPENSSL_free(buf);
      BN_free(serial);
      return bs;
  }
  
  static int x509_certify(X509_STORE *ctx, char *CAfile, const EVP_MD *digest,
                          X509 *x, X509 *xca, EVP_PKEY *pkey,
                          STACK_OF(OPENSSL_STRING) *sigopts,
                          char *serialfile, int create,
                          int days, int clrext, CONF *conf, char *section,
                          ASN1_INTEGER *sno, int reqfile)
  {
      int ret = 0;
      ASN1_INTEGER *bs = NULL;
      X509_STORE_CTX xsc;
      EVP_PKEY *upkey;
  
      upkey = X509_get0_pubkey(xca);
      EVP_PKEY_copy_parameters(upkey, pkey);
  
      if (!X509_STORE_CTX_init(&xsc, ctx, x, NULL)) {
          BIO_printf(bio_err, "Error initialising X509 store\n");
          goto end;
      }
      if (sno)
          bs = sno;
      else if ((bs = x509_load_serial(CAfile, serialfile, create)) == NULL)
          goto end;
  
      /*
       * NOTE: this certificate can/should be self signed, unless it was a
       * certificate request in which case it is not.
       */
      X509_STORE_CTX_set_cert(&xsc, x);
      X509_STORE_CTX_set_flags(&xsc, X509_V_FLAG_CHECK_SS_SIGNATURE);
      if (!reqfile && X509_verify_cert(&xsc) <= 0)
          goto end;
  
      if (!X509_check_private_key(xca, pkey)) {
          BIO_printf(bio_err,
                     "CA certificate and CA private key do not match\n");
          goto end;
      }
  
      if (!X509_set_issuer_name(x, X509_get_subject_name(xca)))
          goto end;
      if (!X509_set_serialNumber(x, bs))
          goto end;
  
      if (X509_gmtime_adj(X509_get_notBefore(x), 0L) == NULL)
          goto end;
  
      /* hardwired expired */
      if (X509_time_adj_ex(X509_get_notAfter(x), days, 0, NULL) == NULL)
          goto end;
  
      if (clrext) {
          while (X509_get_ext_count(x) > 0)
              X509_delete_ext(x, 0);
      }
  
      if (conf) {
          X509V3_CTX ctx2;
          X509_set_version(x, 2); /* version 3 certificate */
          X509V3_set_ctx(&ctx2, xca, x, NULL, NULL, 0);
          X509V3_set_nconf(&ctx2, conf);
          if (!X509V3_EXT_add_nconf(conf, &ctx2, section, x))
              goto end;
      }
  
      if (!do_X509_sign(x, pkey, digest, sigopts))
          goto end;
      ret = 1;
   end:
      X509_STORE_CTX_cleanup(&xsc);
      if (!ret)
          ERR_print_errors(bio_err);
      if (!sno)
          ASN1_INTEGER_free(bs);
      return ret;
  }
  
  static int callb(int ok, X509_STORE_CTX *ctx)
  {
      int err;
      X509 *err_cert;
  
      /*
       * it is ok to use a self signed certificate This case will catch both
       * the initial ok == 0 and the final ok == 1 calls to this function
       */
      err = X509_STORE_CTX_get_error(ctx);
      if (err == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
          return 1;
  
      /*
       * BAD we should have gotten an error.  Normally if everything worked
       * X509_STORE_CTX_get_error(ctx) will still be set to
       * DEPTH_ZERO_SELF_....
       */
      if (ok) {
          BIO_printf(bio_err,
                     "error with certificate to be certified - should be self signed\n");
          return 0;
      } else {
          err_cert = X509_STORE_CTX_get_current_cert(ctx);
          print_name(bio_err, NULL, X509_get_subject_name(err_cert), 0);
          BIO_printf(bio_err,
                     "error with certificate - error %d at depth %d\n%s\n", err,
                     X509_STORE_CTX_get_error_depth(ctx),
                     X509_verify_cert_error_string(err));
          return 1;
      }
  }
  
  /* self sign */
  static int sign(X509 *x, EVP_PKEY *pkey, int days, int clrext,
                  const EVP_MD *digest, CONF *conf, char *section)
  {
  
      if (!X509_set_issuer_name(x, X509_get_subject_name(x)))
          goto err;
      if (X509_gmtime_adj(X509_get_notBefore(x), 0) == NULL)
          goto err;
  
      if (X509_time_adj_ex(X509_get_notAfter(x), days, 0, NULL) == NULL)
          goto err;
  
      if (!X509_set_pubkey(x, pkey))
          goto err;
      if (clrext) {
          while (X509_get_ext_count(x) > 0)
              X509_delete_ext(x, 0);
      }
      if (conf) {
          X509V3_CTX ctx;
          X509_set_version(x, 2); /* version 3 certificate */
          X509V3_set_ctx(&ctx, x, x, NULL, NULL, 0);
          X509V3_set_nconf(&ctx, conf);
          if (!X509V3_EXT_add_nconf(conf, &ctx, section, x))
              goto err;
      }
      if (!X509_sign(x, pkey, digest))
          goto err;
      return 1;
   err:
      ERR_print_errors(bio_err);
      return 0;
  }
  
  static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt)
  {
      int id, i, idret;
      char *pname;
      id = X509_PURPOSE_get_id(pt);
      pname = X509_PURPOSE_get0_name(pt);
      for (i = 0; i < 2; i++) {
          idret = X509_check_purpose(cert, id, i);
          BIO_printf(bio, "%s%s : ", pname, i ? " CA" : "");
          if (idret == 1)
              BIO_printf(bio, "Yes\n");
          else if (idret == 0)
              BIO_printf(bio, "No\n");
          else
              BIO_printf(bio, "Yes (WARNING code=%d)\n", idret);
      }
      return 1;
  }
  