apps/pkeyparam.c

   1 /*
   2  * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 <stdlib.h>
  13 #include "apps.h"
  14 #include "progs.h"
  15 #include <openssl/pem.h>
  16 #include <openssl/err.h>
  17 #include <openssl/evp.h>
  18
  19 typedef enum OPTION_choice {
  20     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  21     OPT_IN, OPT_OUT, OPT_TEXT, OPT_NOOUT,
  22     OPT_ENGINE, OPT_CHECK,
  23     OPT_PROV_ENUM
  24 } OPTION_CHOICE;
  25
  26 const OPTIONS pkeyparam_options[] = {
  27     OPT_SECTION("General"),
  28     {"help", OPT_HELP, '-', "Display this summary"},
  29 #ifndef OPENSSL_NO_ENGINE
  30     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  31 #endif
  32     {"check", OPT_CHECK, '-', "Check key param consistency"},
  33
  34     OPT_SECTION("Input"),
  35     {"in", OPT_IN, '<', "Input file"},
  36
  37     OPT_SECTION("Output"),
  38     {"out", OPT_OUT, '>', "Output file"},
  39     {"text", OPT_TEXT, '-', "Print parameters as text"},
  40     {"noout", OPT_NOOUT, '-', "Don't output encoded parameters"},
  41
  42     OPT_PROV_OPTIONS,
  43     {NULL}
  44 };
  45
  46 int pkeyparam_main(int argc, char **argv)
  47 {
  48     ENGINE *e = NULL;
  49     BIO *in = NULL, *out = NULL;
  50     EVP_PKEY *pkey = NULL;
  51     EVP_PKEY_CTX *ctx = NULL;
  52     int text = 0, noout = 0, ret = EXIT_FAILURE, check = 0, r;
  53     OPTION_CHOICE o;
  54     char *infile = NULL, *outfile = NULL, *prog;
  55     unsigned long err;
  56
  57     prog = opt_init(argc, argv, pkeyparam_options);
  58     while ((o = opt_next()) != OPT_EOF) {
  59         switch (o) {
  60         case OPT_EOF:
  61         case OPT_ERR:
  62  opthelp:
  63             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  64             goto end;
  65         case OPT_HELP:
  66             opt_help(pkeyparam_options);
  67             ret = 0;
  68             goto end;
  69         case OPT_IN:
  70             infile = opt_arg();
  71             break;
  72         case OPT_OUT:
  73             outfile = opt_arg();
  74             break;
  75         case OPT_ENGINE:
  76             e = setup_engine(opt_arg(), 0);
  77             break;
  78         case OPT_TEXT:
  79             text = 1;
  80             break;
  81         case OPT_NOOUT:
  82             noout = 1;
  83             break;
  84         case OPT_CHECK:
  85             check = 1;
  86             break;
  87         case OPT_PROV_CASES:
  88             if (!opt_provider(o))
  89                 goto end;
  90             break;
  91         }
  92     }
  93
  94     /* No extra arguments. */
  95     argc = opt_num_rest();
  96     if (argc != 0)
  97         goto opthelp;
  98
  99     in = bio_open_default(infile, 'r', FORMAT_PEM);
 100     if (in == NULL)
 101         goto end;
 102     out = bio_open_default(outfile, 'w', FORMAT_PEM);
 103     if (out == NULL)
 104         goto end;
 105     pkey = PEM_read_bio_Parameters(in, NULL);
 106     if (pkey == NULL) {
 107         BIO_printf(bio_err, "Error reading parameters\n");
 108         ERR_print_errors(bio_err);
 109         goto end;
 110     }
 111
 112     if (check) {
 113         ctx = EVP_PKEY_CTX_new(pkey, e);
 114         if (ctx == NULL) {
 115             ERR_print_errors(bio_err);
 116             goto end;
 117         }
 118
 119         r = EVP_PKEY_param_check(ctx);
 120
 121         if (r == 1) {
 122             BIO_printf(out, "Parameters are valid\n");
 123         } else {
 124             /*
 125              * Note: at least for RSA keys if this function returns
 126              * -1, there will be no error reasons.
 127              */
 128             BIO_printf(out, "Parameters are invalid\n");
 129
 130             while ((err = ERR_peek_error()) != 0) {
 131                 BIO_printf(out, "Detailed error: %s\n",
 132                            ERR_reason_error_string(err));
 133                 ERR_get_error(); /* remove err from error stack */
 134             }
 135             goto end;
 136         }
 137     }
 138
 139     if (!noout)
 140         PEM_write_bio_Parameters(out, pkey);
 141
 142     if (text)
 143         EVP_PKEY_print_params(out, pkey, 0, NULL);
 144
 145     ret = EXIT_SUCCESS;
 146
 147  end:
 148     EVP_PKEY_CTX_free(ctx);
 149     EVP_PKEY_free(pkey);
 150     release_engine(e);
 151     BIO_free_all(out);
 152     BIO_free(in);
 153
 154     return ret;
 155 }