text: /*
   * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (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 BLIK_OPENSSL_V_openssl__opensslconf_h //original-code:<openssl/opensslconf.h>
  #ifdef OPENSSL_NO_DSA
  NON_EMPTY_TRANSLATION_UNIT
  #else
  
  # include <stdio.h>
  # include <string.h>
  # include <sys/types.h>
  # include <sys/stat.h>
  # include "apps.h"
  # include BLIK_OPENSSL_V_openssl__bio_h //original-code:<openssl/bio.h>
  # include BLIK_OPENSSL_V_openssl__err_h //original-code:<openssl/err.h>
  # include BLIK_OPENSSL_V_openssl__bn_h //original-code:<openssl/bn.h>
  # include BLIK_OPENSSL_V_openssl__dsa_h //original-code:<openssl/dsa.h>
  # include BLIK_OPENSSL_V_openssl__x509_h //original-code:<openssl/x509.h>
  # include BLIK_OPENSSL_V_openssl__pem_h //original-code:<openssl/pem.h>
  
  typedef enum OPTION_choice {
      OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
      OPT_OUT, OPT_PASSOUT, OPT_ENGINE, OPT_RAND, OPT_CIPHER
  } OPTION_CHOICE;
  
  OPTIONS gendsa_options[] = {
      {OPT_HELP_STR, 1, '-', "Usage: %s [args] dsaparam-file\n"},
      {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
      {"help", OPT_HELP, '-', "Display this summary"},
      {"out", OPT_OUT, '>', "Output the key to the specified file"},
      {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
      {"rand", OPT_RAND, 's',
       "Load the file(s) into the random number generator"},
      {"", OPT_CIPHER, '-', "Encrypt the output with any supported cipher"},
  # ifndef OPENSSL_NO_ENGINE
      {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  # endif
      {NULL}
  };
  
  int gendsa_main(int argc, char **argv)
  {
      ENGINE *e = NULL;
      BIO *out = NULL, *in = NULL;
      DSA *dsa = NULL;
      const EVP_CIPHER *enc = NULL;
      char *inrand = NULL, *dsaparams = NULL;
      char *outfile = NULL, *passoutarg = NULL, *passout = NULL, *prog;
      OPTION_CHOICE o;
      int ret = 1, private = 0;
      const BIGNUM *p = NULL;
  
      prog = opt_init(argc, argv, gendsa_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:
              ret = 0;
              opt_help(gendsa_options);
              goto end;
          case OPT_OUT:
              outfile = opt_arg();
              break;
          case OPT_PASSOUT:
              passoutarg = opt_arg();
              break;
          case OPT_ENGINE:
              e = setup_engine(opt_arg(), 0);
              break;
          case OPT_RAND:
              inrand = opt_arg();
              break;
          case OPT_CIPHER:
              if (!opt_cipher(opt_unknown(), &enc))
                  goto end;
              break;
          }
      }
      argc = opt_num_rest();
      argv = opt_rest();
      private = 1;
  
      if (argc != 1)
          goto opthelp;
      dsaparams = *argv;
  
      if (!app_passwd(NULL, passoutarg, NULL, &passout)) {
          BIO_printf(bio_err, "Error getting password\n");
          goto end;
      }
  
      in = bio_open_default(dsaparams, 'r', FORMAT_PEM);
      if (in == NULL)
          goto end2;
  
      if ((dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL)) == NULL) {
          BIO_printf(bio_err, "unable to load DSA parameter file\n");
          goto end;
      }
      BIO_free(in);
      in = NULL;
  
      out = bio_open_owner(outfile, FORMAT_PEM, private);
      if (out == NULL)
          goto end2;
  
      if (!app_RAND_load_file(NULL, 1) && inrand == NULL) {
          BIO_printf(bio_err,
                     "warning, not much extra random data, consider using the -rand option\n");
      }
      if (inrand != NULL)
          BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
                     app_RAND_load_files(inrand));
  
      DSA_get0_pqg(dsa, &p, NULL, NULL);
      BIO_printf(bio_err, "Generating DSA key, %d bits\n", BN_num_bits(p));
      if (!DSA_generate_key(dsa))
          goto end;
  
      app_RAND_write_file(NULL);
  
      assert(private);
      if (!PEM_write_bio_DSAPrivateKey(out, dsa, enc, NULL, 0, NULL, passout))
          goto end;
      ret = 0;
   end:
      if (ret != 0)
          ERR_print_errors(bio_err);
   end2:
      BIO_free(in);
      BIO_free_all(out);
      DSA_free(dsa);
      release_engine(e);
      OPENSSL_free(passout);
      return (ret);
  }
  #endif
  