text: /*
   * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include "apps.h"
  #include "progs.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, X509 *issuer,
                  STACK_OF(OPENSSL_STRING) *sigopts,
                  int days, int clrext,
                  const EVP_MD *digest, CONF *conf, const char *section,
                  int preserve_dates);
  static int x509_certify(X509_STORE *ctx, const char *CAfile, const EVP_MD *digest,
                          X509 *x, X509 *xca, EVP_PKEY *pkey,
                          STACK_OF(OPENSSL_STRING) *sigopts, const char *serialfile,
                          int create, int days, int clrext, CONF *conf,
                          const char *section, ASN1_INTEGER *sno, int reqfile,
                          int preserve_dates);
  static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt);
  static int print_x509v3_exts(BIO *bio, X509 *x, const char *exts);
  
  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_VFYOPT, 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_NEW, OPT_FORCE_PUBKEY, OPT_SUBJ,
      OPT_ADDTRUST, OPT_ADDREJECT, OPT_SETALIAS, OPT_CERTOPT, OPT_NAMEOPT,
      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, OPT_PRESERVE_DATES,
      OPT_R_ENUM, OPT_PROV_ENUM, OPT_EXT
  } OPTION_CHOICE;
  
  const OPTIONS x509_options[] = {
      OPT_SECTION("General"),
      {"help", OPT_HELP, '-', "Display this summary"},
  #ifndef OPENSSL_NO_ENGINE
      {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  #endif
  
      {"inform", OPT_INFORM, 'f',
       "CSR input format (DER or PEM) - default PEM"},
      {"in", OPT_IN, '<', "Input file - default stdin"},
      {"passin", OPT_PASSIN, 's', "Private key and cert file pass-phrase source"},
      {"outform", OPT_OUTFORM, 'f',
       "Output format (DER or PEM) - default PEM"},
      {"out", OPT_OUT, '>', "Output file - default stdout"},
      {"keyform", OPT_KEYFORM, 'E', "Private key format (ENGINE, other values ignored)"},
      {"req", OPT_REQ, '-', "Input is a certificate request, sign and output"},
      {"vfyopt", OPT_VFYOPT, 's', "Verification parameter in n:v form"},
  
      OPT_SECTION("Output"),
      {"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)"},
      {"purpose", OPT_PURPOSE, '-', "Print out certificate purposes"},
      {"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"},
      {"ocspid", OPT_OCSPID, '-',
       "Print OCSP hash values for the subject name and public key"},
      {"ocsp_uri", OPT_OCSP_URI, '-', "Print OCSP Responder URL(s)"},
      {"nocert", OPT_NOCERT, '-', "No certificate output"},
      {"trustout", OPT_TRUSTOUT, '-', "Output a trusted certificate"},
      {"x509toreq", OPT_X509TOREQ, '-',
       "Output a certification request object"},
      {"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"},
      {"text", OPT_TEXT, '-', "Print the certificate in text form"},
      {"ext", OPT_EXT, 's', "Print various X509V3 extensions"},
  #ifndef OPENSSL_NO_MD5
      {"subject_hash_old", OPT_SUBJECT_HASH_OLD, '-',
       "Print old-style (MD5) subject hash value"},
      {"issuer_hash_old", OPT_ISSUER_HASH_OLD, '-',
       "Print old-style (MD5) issuer hash value"},
  #endif
      {"nameopt", OPT_NAMEOPT, 's', "Certificate subject/issuer name printing options"},
  
      OPT_SECTION("Certificate"),
      {"startdate", OPT_STARTDATE, '-', "Set notBefore field"},
      {"enddate", OPT_ENDDATE, '-', "Set notAfter field"},
      {"dates", OPT_DATES, '-', "Both Before and After dates"},
      {"clrtrust", OPT_CLRTRUST, '-', "Clear all trusted purposes"},
      {"clrext", OPT_CLREXT, '-', "Clear all certificate extensions"},
      {"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"},
      {"signkey", OPT_SIGNKEY, 's', "Self-sign cert with arg"},
      {"set_serial", OPT_SET_SERIAL, 's', "Serial number to use"},
      {"extensions", OPT_EXTENSIONS, 's', "Section from config file to use"},
      {"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"},
      {"force_pubkey", OPT_FORCE_PUBKEY, '<', "Force the key to put inside certificate"},
      {"subj", OPT_SUBJ, 's', "Set or override certificate subject (and issuer)"},
  
      OPT_SECTION("CA"),
      {"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"},
      {"extfile", OPT_EXTFILE, '<', "File with X509V3 extensions to add"},
      OPT_R_OPTIONS,
      OPT_PROV_OPTIONS,
      {"CAform", OPT_CAFORM, 'F', "CA cert format (PEM/DER/P12); has no effect"},
      {"CAkeyform", OPT_CAKEYFORM, 'E', "CA key format (ENGINE, other values ignored)"},
      {"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
      {"CAcreateserial", OPT_CACREATESERIAL, '-',
       "Create serial number file if it does not exist"},
      {"CAserial", OPT_CASERIAL, 's', "Serial file"},
      {"new", OPT_NEW, '-', "Generate a certificate from scratch"},
      {"next_serial", OPT_NEXT_SERIAL, '-', "Increment current certificate serial number"},
      {"clrreject", OPT_CLRREJECT, '-',
       "Clears all the prohibited or rejected uses of the certificate"},
      {"badsig", OPT_BADSIG, '-', "Corrupt last byte of certificate signature (for test)"},
      {"", OPT_MD, '-', "Any supported digest"},
      {"preserve_dates", OPT_PRESERVE_DATES, '-', "preserve existing dates when signing"},
      {NULL}
  };
  
  int x509_main(int argc, char **argv)
  {
      ASN1_INTEGER *sno = NULL;
      ASN1_OBJECT *objtmp = NULL;
      BIO *out = NULL;
      CONF *extconf = NULL;
      EVP_PKEY *Upkey = NULL, *CApkey = NULL, *fkey = NULL;
      int newcert = 0;
      char *subj = NULL;
      X509_NAME *fsubj = NULL;
      const unsigned long chtype = MBSTRING_ASC;
      const int multirdn = 1;
      STACK_OF(ASN1_OBJECT) *trust = NULL, *reject = NULL;
      STACK_OF(OPENSSL_STRING) *sigopts = NULL, *vfyopts = 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, *exts = NULL;
      char *extsect = NULL, *extfile = NULL, *passin = NULL, *passinarg = NULL;
      char *infile = NULL, *outfile = NULL, *keyfile = NULL, *CAfile = NULL;
      char *prog;
      int x509req = 0, days = DEF_DAYS, modulus = 0, pubkey = 0, pprint = 0;
      int CAformat = FORMAT_PEM, CAkeyformat = FORMAT_PEM;
      int fingerprint = 0, reqfile = 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, ext = 0;
      int enddate = 0;
      time_t checkoffset = 0;
      unsigned long certflag = 0;
      int preserve_dates = 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_PEMDER, &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_ANY, &keyformat))
                  goto opthelp;
              break;
          case OPT_CAFORM:
              if (!opt_format(opt_arg(), OPT_FMT_ANY, &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 = 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_VFYOPT:
              if (!vfyopts)
                  vfyopts = sk_OPENSSL_STRING_new_null();
              if (!vfyopts || !sk_OPENSSL_STRING_push(vfyopts, opt_arg()))
                  goto opthelp;
              break;
          case OPT_DAYS:
              if (preserve_dates)
                  goto opthelp;
              days = atoi(opt_arg());
              break;
          case OPT_PASSIN:
              passinarg = opt_arg();
              break;
          case OPT_EXTFILE:
              extfile = opt_arg();
              break;
          case OPT_R_CASES:
              if (!opt_rand(o))
                  goto end;
              break;
          case OPT_PROV_CASES:
              if (!opt_provider(o))
                  goto end;
              break;
          case OPT_EXTENSIONS:
              extsect = opt_arg();
              break;
          case OPT_SIGNKEY:
              keyfile = opt_arg();
              sign_flag = ++num;
              break;
          case OPT_CA:
              CAfile = opt_arg();
              CA_flag = ++num;
              break;
          case OPT_CAKEY:
              CAkeyfile = opt_arg();
              break;
          case OPT_CASERIAL:
              CAserial = opt_arg();
              break;
          case OPT_SET_SERIAL:
              if (sno != NULL) {
                  BIO_printf(bio_err, "Serial number supplied twice\n");
                  goto opthelp;
              }
              if ((sno = s2i_ASN1_INTEGER(NULL, opt_arg())) == NULL)
                  goto opthelp;
              break;
          case OPT_NEW:
              newcert = 1;
              break;
          case OPT_FORCE_PUBKEY:
              fkeyfile = opt_arg();
              break;
          case OPT_SUBJ:
              subj = 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);
              objtmp = NULL;
              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);
              objtmp = NULL;
              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:
              if (!set_nameopt(opt_arg()))
                  goto opthelp;
              break;
          case OPT_ENGINE:
              e = setup_engine(opt_arg(), 0);
              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_EXT:
              ext = ++num;
              exts = opt_arg();
              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_PRESERVE_DATES:
              if (days != DEF_DAYS)
                  goto opthelp;
              preserve_dates = 1;
              break;
          case OPT_MD:
              if (!opt_md(opt_unknown(), &digest))
                  goto opthelp;
          }
      }
  
      /* No extra arguments. */
      argc = opt_num_rest();
      if (argc != 0)
          goto opthelp;
  
      if (!app_passwd(passinarg, NULL, &passin, NULL)) {
          BIO_printf(bio_err, "Error getting password\n");
          goto end;
      }
  
      if (!X509_STORE_set_default_paths_ex(ctx, app_get0_libctx(),
                                           app_get0_propq())) {
          ERR_print_errors(bio_err);
          goto end;
      }
  
      if (newcert && infile != NULL) {
          BIO_printf(bio_err, "The -in option must not be used since -new is set\n");
          goto end;
      }
      if (newcert && fkeyfile == NULL) {
          BIO_printf(bio_err,
                     "The -new option requires a public key to be set using -force_pubkey\n");
          goto end;
      }
      if (fkeyfile != NULL) {
          fkey = load_pubkey(fkeyfile, keyformat, 0, NULL, e, "forced key");
          if (fkey == NULL)
              goto end;
      }
  
      if (newcert && subj == NULL) {
          BIO_printf(bio_err,
                     "The -new option requires a subject to be set using -subj\n");
          goto end;
      }
      if (subj != NULL
              && (fsubj = parse_name(subj, chtype, multirdn, "subject")) == 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;
      } else if (!CA_flag && CAkeyfile != NULL) {
          BIO_printf(bio_err,
                     "Ignoring -CAkey option since no -CA option is given\n");
      }
  
      if (extfile != NULL) {
          X509V3_CTX ctx2;
          if ((extconf = app_load_config(extfile)) == NULL)
              goto end;
          if (extsect == NULL) {
              extsect = NCONF_get_string(extconf, "default", "extensions");
              if (extsect == NULL) {
                  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 checking extension section %s\n", extsect);
              ERR_print_errors(bio_err);
              goto end;
          }
      }
  
      if (reqfile) {
          EVP_PKEY *pkey;
  
          req = load_csr(infile, informat, "certificate request input");
          if (req == NULL)
              goto end;
  
          if ((pkey = X509_REQ_get0_pubkey(req)) == NULL) {
              BIO_printf(bio_err, "Error unpacking public key\n");
              goto end;
          }
          i = do_X509_REQ_verify(req, pkey, vfyopts);
          if (i < 0) {
              BIO_printf(bio_err, "Request self-signature verification error\n");
              ERR_print_errors(bio_err);
              goto end;
          }
          if (i == 0) {
              BIO_printf(bio_err,
                         "Request self-signature did not match the certificate request\n");
              goto end;
          } else {
              BIO_printf(bio_err, "Request self-signature ok\n");
          }
  
          print_name(bio_err, "subject=", X509_REQ_get_subject_name(req),
                     get_nameopt());
      }
  
      if (reqfile || newcert) {
          X509_NAME *n;
  
          if (!sign_flag && CAkeyfile == NULL) {
              BIO_printf(bio_err,
                         "We need a private key to sign with, use -signkey or -CAkey or -CA <file> with private key\n");
              goto end;
          }
          if ((x = X509_new_ex(app_get0_libctx(), app_get0_propq())) == 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;
          }
  
          n = req == NULL ? fsubj : X509_REQ_get_subject_name(req);
          if (!X509_set_issuer_name(x, n) || !X509_set_subject_name(x, n))
              goto end;
          if (!set_cert_times(x, NULL, NULL, days))
              goto end;
  
          if (!X509_set_pubkey(x, fkey != NULL ? fkey : X509_REQ_get0_pubkey(req)))
              goto end;
      } else {
          x = load_cert_pass(infile, 1, passin, "certificate");
          if (x == NULL)
              goto end;
          if (fkey != NULL && !X509_set_pubkey(x, fkey))
              goto end;
          if (fsubj != NULL && !X509_set_subject_name(x, fsubj))
              goto end;
      }
  
      if (CA_flag) {
          xca = load_cert_pass(CAfile, 1, passin, "CA certificate");
          if (xca == NULL)
              goto end;
      }
  
      out = bio_open_default(outfile, 'w', outformat);
      if (out == 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 != NULL) {
          for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++) {
              objtmp = sk_ASN1_OBJECT_value(trust, i);
              X509_add1_trust_object(x, objtmp);
          }
          objtmp = NULL;
      }
  
      if (reject != NULL) {
          for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++) {
              objtmp = sk_ASN1_OBJECT_value(reject, i);
              X509_add1_reject_object(x, objtmp);
          }
          objtmp = NULL;
      }
  
      if (badsig) {
          const ASN1_BIT_STRING *signature;
  
          X509_get0_signature(&signature, NULL, x);
          corrupt_signature(signature);
      }
  
      if (num) {
          for (i = 1; i <= num; i++) {
              if (issuer == i) {
                  print_name(out, "issuer=", X509_get_issuer_name(x), get_nameopt());
              } else if (subject == i) {
                  print_name(out, "subject=",
                             X509_get_subject_name(x), get_nameopt());
              } else if (serial == i) {
                  BIO_printf(out, "serial=");
                  i2a_ASN1_INTEGER(out, X509_get0_serialNumber(x));
                  BIO_printf(out, "\n");
              } else if (next_serial == i) {
                  ASN1_INTEGER *ser = X509_get_serialNumber(x);
                  BIGNUM *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_is_a(pkey, "RSA")) {
                      BIGNUM *n;
  
                      /* Every RSA key has an 'n' */
                      EVP_PKEY_get_bn_param(pkey, "n", &n);
                      BN_print(out, n);
                      BN_free(n);
                  } else
  #endif
  #ifndef OPENSSL_NO_DSA
                  if (EVP_PKEY_id(pkey) == EVP_PKEY_DSA) {
                      const BIGNUM *dsapub = NULL;
                      DSA_get0_key(EVP_PKEY_get0_DSA(pkey), &dsapub, NULL);
                      BN_print(out, dsapub);
                  } 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 (text == i) {
                  X509_print_ex(out, x, get_nameopt(), certflag);
              } else if (startdate == i) {
                  BIO_puts(out, "notBefore=");
                  ASN1_TIME_print(out, X509_get0_notBefore(x));
                  BIO_puts(out, "\n");
              } else if (enddate == i) {
                  BIO_puts(out, "notAfter=");
                  ASN1_TIME_print(out, X509_get0_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 == NULL)
                      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) {
                  if (Upkey == NULL) {
                      Upkey = load_key(keyfile, keyformat, 0,
                                       passin, e, "private key");
                      if (Upkey == NULL)
                          goto end;
                  }
                  if (fkey == NULL && !X509_set_pubkey(x, Upkey))
                      goto end;
                  if (!sign(x, Upkey, x /* self-issuing */, sigopts, days, clrext,
                            digest, extconf, extsect, preserve_dates)) {
                      ERR_print_errors(bio_err);
                      goto end;
                  }
              } else if (CA_flag == i) {
                  if (CAkeyfile != NULL) {
                      CApkey = load_key(CAkeyfile, CAkeyformat,
                                        0, passin, e, "CA private key");
                      if (CApkey == NULL)
                          goto end;
                  }
  
                  if (!x509_certify(ctx, CAfile, digest, x, xca,
                                    CApkey, sigopts,
                                    CAserial, CA_createserial, days, clrext,
                                    extconf, extsect, sno, reqfile, preserve_dates))
                      goto end;
              } else if (x509req == i) {
                  EVP_PKEY *pk;
  
                  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;
                  }
  
                  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_ex(out, rq, get_nameopt(), X509_FLAG_COMPAT);
                      PEM_write_bio_X509_REQ(out, rq);
                  }
                  noout = 1;
              } else if (ocspid == i) {
                  X509_ocspid_print(out, x);
              } else if (ext == i) {
                  print_x509v3_exts(out, x, exts);
              }
          }
      }
  
      if (checkend) {
          time_t tcheck = time(NULL) + checkoffset;
  
          if (X509_cmp_time(X509_get0_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 (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:
      NCONF_free(extconf);
      BIO_free_all(out);
      X509_STORE_free(ctx);
      X509_NAME_free(fsubj);
      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);
      sk_OPENSSL_STRING_free(vfyopts);
      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);
      ASN1_OBJECT_free(objtmp);
      release_engine(e);
      clear_free(passin);
      return ret;
  }
  
  static ASN1_INTEGER *x509_load_serial(const char *CAfile,
                                        const char *serialfile, int create)
  {
      char *buf = NULL;
      ASN1_INTEGER *bs = NULL;
      BIGNUM *serial = NULL;
  
      if (serialfile == NULL) {
          const char *p = strrchr(CAfile, '.');
          size_t len = p != NULL ? (size_t)(p - CAfile) : strlen(CAfile);
  
          buf = app_malloc(len + sizeof(POSTFIX), "serial# buffer");
          memcpy(buf, CAfile, len);
          memcpy(buf + len, POSTFIX, sizeof(POSTFIX));
          serialfile = buf;
      }
  
      serial = load_serial(serialfile, create, NULL);
      if (serial == NULL)
          goto end;
  
      if (!BN_add_word(serial, 1)) {
          BIO_printf(bio_err, "Serial number increment failure\n");
          goto end;
      }
  
      if (!save_serial(serialfile, NULL, serial, &bs))
          goto end;
  
   end:
      OPENSSL_free(buf);
      BN_free(serial);
      return bs;
  }
  
  static int x509_certify(X509_STORE *ctx, const char *CAfile, const EVP_MD *digest,
                          X509 *x, X509 *xca, EVP_PKEY *pkey,
                          STACK_OF(OPENSSL_STRING) *sigopts,
                          const char *serialfile, int create,
                          int days, int clrext, CONF *conf, const char *section,
                          ASN1_INTEGER *sno, int reqfile, int preserve_dates)
  {
      int ret = 0;
      ASN1_INTEGER *bs = NULL;
      X509_STORE_CTX *xsc = NULL;
      EVP_PKEY *upkey;
  
      upkey = X509_get0_pubkey(xca);
      if (upkey == NULL) {
          BIO_printf(bio_err, "Error obtaining CA X509 public key\n");
          goto end;
      }
      EVP_PKEY_copy_parameters(upkey, pkey);
  
      xsc = X509_STORE_CTX_new();
      if (xsc == NULL || !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_serialNumber(x, bs))
          goto end;
  
      if (!sign(x, pkey, xca, sigopts, days, clrext, digest,
                conf, section, preserve_dates))
          goto end;
  
      ret = 1;
   end:
      X509_STORE_CTX_free(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;
      }
  }
  
  static int sign(X509 *x, EVP_PKEY *pkey, X509 *issuer,
                  STACK_OF(OPENSSL_STRING) *sigopts,
                  int days, int clrext,
                  const EVP_MD *digest, CONF *conf, const char *section,
                  int preserve_dates)
  {
      if (!X509_set_issuer_name(x, X509_get_subject_name(issuer)))
          return 0;
  
      if (!preserve_dates && !set_cert_times(x, NULL, NULL, days))
          return 0;
  
      if (clrext) {
          while (X509_get_ext_count(x) > 0)
              X509_delete_ext(x, 0);
      }
      if (conf != NULL) {
          X509V3_CTX ext_ctx;
  
          X509V3_set_ctx(&ext_ctx, issuer, x, NULL, NULL, X509V3_CTX_REPLACE);
          X509V3_set_nconf(&ext_ctx, conf);
          if (!X509V3_EXT_add_nconf(conf, &ext_ctx, section, x)) {
              BIO_printf(bio_err,
                         "Error adding extensions from section %s\n", section);
              return 0;
          }
      }
      return do_X509_sign(x, pkey, digest, sigopts);
  }
  
  static int purpose_print(BIO *bio, X509 *cert, X509_PURPOSE *pt)
  {
      int id, i, idret;
      const 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;
  }
  
  static int parse_ext_names(char *names, const char **result)
  {
      char *p, *q;
      int cnt = 0, len = 0;
  
      p = q = names;
      len = strlen(names);
  
      while (q - names <= len) {
          if (*q != ',' && *q != '\0') {
              q++;
              continue;
          }
          if (p != q) {
              /* found */
              if (result != NULL) {
                  result[cnt] = p;
                  *q = '\0';
              }
              cnt++;
          }
          p = ++q;
      }
  
      return cnt;
  }
  
  static int print_x509v3_exts(BIO *bio, X509 *x, const char *ext_names)
  {
      const STACK_OF(X509_EXTENSION) *exts = NULL;
      STACK_OF(X509_EXTENSION) *exts2 = NULL;
      X509_EXTENSION *ext = NULL;
      ASN1_OBJECT *obj;
      int i, j, ret = 0, num, nn = 0;
      const char *sn, **names = NULL;
      char *tmp_ext_names = NULL;
  
      exts = X509_get0_extensions(x);
      if ((num = sk_X509_EXTENSION_num(exts)) <= 0) {
          BIO_printf(bio, "No extensions in certificate\n");
          ret = 1;
          goto end;
      }
  
      /* parse comma separated ext name string */
      if ((tmp_ext_names = OPENSSL_strdup(ext_names)) == NULL)
          goto end;
      if ((nn = parse_ext_names(tmp_ext_names, NULL)) == 0) {
          BIO_printf(bio, "Invalid extension names: %s\n", ext_names);
          goto end;
      }
      if ((names = OPENSSL_malloc(sizeof(char *) * nn)) == NULL)
          goto end;
      parse_ext_names(tmp_ext_names, names);
  
      for (i = 0; i < num; i++) {
          ext = sk_X509_EXTENSION_value(exts, i);
  
          /* check if this ext is what we want */
          obj = X509_EXTENSION_get_object(ext);
          sn = OBJ_nid2sn(OBJ_obj2nid(obj));
          if (sn == NULL || strcmp(sn, "UNDEF") == 0)
              continue;
  
          for (j = 0; j < nn; j++) {
              if (strcmp(sn, names[j]) == 0) {
                  /* push the extension into a new stack */
                  if (exts2 == NULL
                      && (exts2 = sk_X509_EXTENSION_new_null()) == NULL)
                      goto end;
                  if (!sk_X509_EXTENSION_push(exts2, ext))
                      goto end;
              }
          }
      }
  
      if (!sk_X509_EXTENSION_num(exts2)) {
          BIO_printf(bio, "No extensions matched with %s\n", ext_names);
          ret = 1;
          goto end;
      }
  
      ret = X509V3_extensions_print(bio, NULL, exts2, 0, 0);
   end:
      sk_X509_EXTENSION_free(exts2);
      OPENSSL_free(names);
      OPENSSL_free(tmp_ext_names);
      return ret;
  }
  