apps/pkeyparam.c

   1 /*
   2  * Copyright 2006-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include "apps.h"
  13 #include <openssl/pem.h>
  14 #include <openssl/err.h>
  15 #include <openssl/evp.h>
  16
  17 typedef enum OPTION_choice {
  18     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  19     OPT_IN, OPT_OUT, OPT_TEXT, OPT_NOOUT, OPT_ENGINE
  20 } OPTION_CHOICE;
  21
  22 const OPTIONS pkeyparam_options[] = {
  23     {"help", OPT_HELP, '-', "Display this summary"},
  24     {"in", OPT_IN, '<', "Input file"},
  25     {"out", OPT_OUT, '>', "Output file"},
  26     {"text", OPT_TEXT, '-', "Print parameters as text"},
  27     {"noout", OPT_NOOUT, '-', "Don't output encoded parameters"},
  28 #ifndef OPENSSL_NO_ENGINE
  29     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  30 #endif
  31     {NULL}
  32 };
  33
  34 int pkeyparam_main(int argc, char **argv)
  35 {
  36     ENGINE *e = NULL;
  37     BIO *in = NULL, *out = NULL;
  38     EVP_PKEY *pkey = NULL;
  39     int text = 0, noout = 0, ret = 1;
  40     OPTION_CHOICE o;
  41     char *infile = NULL, *outfile = NULL, *prog;
  42
  43     prog = opt_init(argc, argv, pkeyparam_options);
  44     while ((o = opt_next()) != OPT_EOF) {
  45         switch (o) {
  46         case OPT_EOF:
  47         case OPT_ERR:
  48  opthelp:
  49             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  50             goto end;
  51         case OPT_HELP:
  52             opt_help(pkeyparam_options);
  53             ret = 0;
  54             goto end;
  55         case OPT_IN:
  56             infile = opt_arg();
  57             break;
  58         case OPT_OUT:
  59             outfile = opt_arg();
  60             break;
  61         case OPT_ENGINE:
  62             e = setup_engine(opt_arg(), 0);
  63             break;
  64         case OPT_TEXT:
  65             text = 1;
  66             break;
  67         case OPT_NOOUT:
  68             noout = 1;
  69             break;
  70         }
  71     }
  72     argc = opt_num_rest();
  73     if (argc != 0)
  74         goto opthelp;
  75
  76     in = bio_open_default(infile, 'r', FORMAT_PEM);
  77     if (in == NULL)
  78         goto end;
  79     out = bio_open_default(outfile, 'w', FORMAT_PEM);
  80     if (out == NULL)
  81         goto end;
  82     pkey = PEM_read_bio_Parameters(in, NULL);
  83     if (pkey == NULL) {
  84         BIO_printf(bio_err, "Error reading parameters\n");
  85         ERR_print_errors(bio_err);
  86         goto end;
  87     }
  88
  89     if (!noout)
  90         PEM_write_bio_Parameters(out, pkey);
  91
  92     if (text)
  93         EVP_PKEY_print_params(out, pkey, 0, NULL);
  94
  95     ret = 0;
  96
  97  end:
  98     EVP_PKEY_free(pkey);
  99     release_engine(e);
 100     BIO_free_all(out);
 101     BIO_free(in);
 102
 103     return ret;
 104 }