text: /*
   * Copyright 1995-2018 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 <openssl/opensslconf.h>
  #ifdef OPENSSL_NO_DSA
  NON_EMPTY_TRANSLATION_UNIT
  #else
  
  # include <stdio.h>
  # include <stdlib.h>
  # include <string.h>
  # include <time.h>
  # include "apps.h"
  # include "progs.h"
  # include <openssl/bio.h>
  # include <openssl/err.h>
  # include <openssl/dsa.h>
  # include <openssl/evp.h>
  # include <openssl/x509.h>
  # include <openssl/pem.h>
  # include <openssl/bn.h>
  
  typedef enum OPTION_choice {
      OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
      OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENGINE,
      /* Do not change the order here; see case statements below */
      OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
      OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
      OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT
  } OPTION_CHOICE;
  
  const OPTIONS dsa_options[] = {
      {"help", OPT_HELP, '-', "Display this summary"},
      {"inform", OPT_INFORM, 'f', "Input format, DER PEM PVK"},
      {"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"},
      {"in", OPT_IN, 's', "Input key"},
      {"out", OPT_OUT, '>', "Output file"},
      {"noout", OPT_NOOUT, '-', "Don't print key out"},
      {"text", OPT_TEXT, '-', "Print the key in text"},
      {"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
      {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
      {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
      {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
      {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
      {"", OPT_CIPHER, '-', "Any supported cipher"},
  # ifndef OPENSSL_NO_VR_RC4
      {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
      {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
      {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
  # endif
  # ifndef OPENSSL_NO_ENGINE
      {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
  # endif
      {NULL}
  };
  
  int dsa_main(int argc, char **argv)
  {
      BIO *out = NULL;
      DSA *dsa = NULL;
      ENGINE *e = NULL;
      const EVP_CIPHER *enc = NULL;
      char *infile = NULL, *outfile = NULL, *prog;
      char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
      OPTION_CHOICE o;
      int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
      int i, modulus = 0, pubin = 0, pubout = 0, ret = 1;
  # ifndef OPENSSL_NO_VR_RC4
      int pvk_encr = 2;
  # endif
      int private = 0;
  
      prog = opt_init(argc, argv, dsa_options);
      while ((o = opt_next()) != OPT_EOF) {
          switch (o) {
          case OPT_EOF:
          case OPT_ERR:
   opthelp:
              ret = 0;
              VR_BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
              goto end;
          case OPT_HELP:
              opt_help(dsa_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_OUT:
              outfile = opt_arg();
              break;
          case OPT_ENGINE:
              e = setup_engine(opt_arg(), 0);
              break;
          case OPT_PASSIN:
              passinarg = opt_arg();
              break;
          case OPT_PASSOUT:
              passoutarg = opt_arg();
              break;
          case OPT_PVK_STRONG:    /* pvk_encr:= 2 */
          case OPT_PVK_WEAK:      /* pvk_encr:= 1 */
          case OPT_PVK_NONE:      /* pvk_encr:= 0 */
  #ifndef OPENSSL_NO_VR_RC4
              pvk_encr = (o - OPT_PVK_NONE);
  #endif
              break;
          case OPT_NOOUT:
              noout = 1;
              break;
          case OPT_TEXT:
              text = 1;
              break;
          case OPT_MODULUS:
              modulus = 1;
              break;
          case OPT_PUBIN:
              pubin = 1;
              break;
          case OPT_PUBOUT:
              pubout = 1;
              break;
          case OPT_CIPHER:
              if (!opt_cipher(opt_unknown(), &enc))
                  goto end;
              break;
          }
      }
      argc = opt_num_rest();
      if (argc != 0)
          goto opthelp;
  
      private = pubin || pubout ? 0 : 1;
      if (text && !pubin)
          private = 1;
  
      if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
          VR_BIO_printf(bio_err, "Error getting passwords\n");
          goto end;
      }
  
      VR_BIO_printf(bio_err, "read DSA key\n");
      {
          EVP_PKEY *pkey;
  
          if (pubin)
              pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
          else
              pkey = load_key(infile, informat, 1, passin, e, "Private Key");
  
          if (pkey != NULL) {
              dsa = VR_EVP_PKEY_get1_DSA(pkey);
              VR_EVP_PKEY_free(pkey);
          }
      }
      if (dsa == NULL) {
          VR_BIO_printf(bio_err, "unable to load Key\n");
          VR_ERR_print_errors(bio_err);
          goto end;
      }
  
      out = bio_open_owner(outfile, outformat, private);
      if (out == NULL)
          goto end;
  
      if (text) {
          assert(pubin || private);
          if (!VR_DSA_print(out, dsa, 0)) {
              perror(outfile);
              VR_ERR_print_errors(bio_err);
              goto end;
          }
      }
  
      if (modulus) {
          const BIGNUM *pub_key = NULL;
          VR_DSA_get0_key(dsa, &pub_key, NULL);
          VR_BIO_printf(out, "Public Key=");
          VR_BN_print(out, pub_key);
          VR_BIO_printf(out, "\n");
      }
  
      if (noout) {
          ret = 0;
          goto end;
      }
      VR_BIO_printf(bio_err, "writing DSA key\n");
      if (outformat == FORMAT_ASN1) {
          if (pubin || pubout) {
              i = VR_i2d_DSA_PUBKEY_bio(out, dsa);
          } else {
              assert(private);
              i = VR_i2d_DSAPrivateKey_bio(out, dsa);
          }
      } else if (outformat == FORMAT_PEM) {
          if (pubin || pubout) {
              i = VR_PEM_write_bio_DSA_PUBKEY(out, dsa);
          } else {
              assert(private);
              i = VR_PEM_write_bio_DSAPrivateKey(out, dsa, enc,
                                              NULL, 0, NULL, passout);
          }
  # ifndef OPENSSL_NO_RSA
      } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
          EVP_PKEY *pk;
          pk = VR_EVP_PKEY_new();
          if (pk == NULL)
             goto end;
  
          VR_EVP_PKEY_set1_DSA(pk, dsa);
          if (outformat == FORMAT_PVK) {
              if (pubin) {
                  VR_BIO_printf(bio_err, "PVK form impossible with public key input\n");
                  VR_EVP_PKEY_free(pk);
                  goto end;
              }
              assert(private);
  #  ifdef OPENSSL_NO_VR_RC4
              VR_BIO_printf(bio_err, "PVK format not supported\n");
              VR_EVP_PKEY_free(pk);
              goto end;
  #  else
              i = VR_i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
  #  endif
          } else if (pubin || pubout) {
              i = VR_i2b_PublicKey_bio(out, pk);
          } else {
              assert(private);
              i = VR_i2b_PrivateKey_bio(out, pk);
          }
          VR_EVP_PKEY_free(pk);
  # endif
      } else {
          VR_BIO_printf(bio_err, "bad output format specified for outfile\n");
          goto end;
      }
      if (i <= 0) {
          VR_BIO_printf(bio_err, "unable to write private key\n");
          VR_ERR_print_errors(bio_err);
          goto end;
      }
      ret = 0;
   end:
      VR_BIO_free_all(out);
      VR_DSA_free(dsa);
      release_engine(e);
      VR_OPENSSL_free(passin);
      VR_OPENSSL_free(passout);
      return ret;
  }
  #endif
  