apps/pkeyparam.c

   1 /*
   2  * Copyright 2006-2018 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 "apps.h"
  13 #include "progs.h"
  14 #include <openssl/pem.h>
  15 #include <openssl/err.h>
  16 #include <openssl/evp.h>
  17
  18 typedef enum OPTION_choice {
  19     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  20     OPT_IN, OPT_OUT, OPT_TEXT, OPT_NOOUT,
  21     OPT_ENGINE, OPT_CHECK
  22 } OPTION_CHOICE;
  23
  24 const OPTIONS pkeyparam_options[] = {
  25     {"help", OPT_HELP, '-', "Display this summary"},
  26     {"in", OPT_IN, '<', "Input file"},
  27     {"out", OPT_OUT, '>', "Output file"},
  28     {"text", OPT_TEXT, '-', "Print parameters as text"},
  29     {"noout", OPT_NOOUT, '-', "Don't output encoded parameters"},
  30 #ifndef OPENSSL_NO_ENGINE
  31     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  32 #endif
  33     {"check", OPT_CHECK, '-', "Check key param consistency"},
  34     {NULL}
  35 };
  36
  37 int pkeyparam_main(int argc, char **argv)
  38 {
  39     ENGINE *e = NULL;
  40     BIO *in = NULL, *out = NULL;
  41     EVP_PKEY *pkey = NULL;
  42     int text = 0, noout = 0, ret = 1, check = 0;
  43     OPTION_CHOICE o;
  44     char *infile = NULL, *outfile = NULL, *prog;
  45
  46     prog = opt_init(argc, argv, pkeyparam_options);
  47     while ((o = opt_next()) != OPT_EOF) {
  48         switch (o) {
  49         case OPT_EOF:
  50         case OPT_ERR:
  51  opthelp:
  52             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  53             goto end;
  54         case OPT_HELP:
  55             opt_help(pkeyparam_options);
  56             ret = 0;
  57             goto end;
  58         case OPT_IN:
  59             infile = opt_arg();
  60             break;
  61         case OPT_OUT:
  62             outfile = opt_arg();
  63             break;
  64         case OPT_ENGINE:
  65             e = setup_engine(opt_arg(), 0);
  66             break;
  67         case OPT_TEXT:
  68             text = 1;
  69             break;
  70         case OPT_NOOUT:
  71             noout = 1;
  72             break;
  73         case OPT_CHECK:
  74             check = 1;
  75             break;
  76         }
  77     }
  78     argc = opt_num_rest();
  79     if (argc != 0)
  80         goto opthelp;
  81
  82     in = bio_open_default(infile, 'r', FORMAT_PEM);
  83     if (in == NULL)
  84         goto end;
  85     out = bio_open_default(outfile, 'w', FORMAT_PEM);
  86     if (out == NULL)
  87         goto end;
  88     pkey = PEM_read_bio_Parameters(in, NULL);
  89     if (pkey == NULL) {
  90         BIO_printf(bio_err, "Error reading parameters\n");
  91         ERR_print_errors(bio_err);
  92         goto end;
  93     }
  94
  95     if (check) {
  96         int r;
  97         EVP_PKEY_CTX *ctx;
  98
  99         ctx = EVP_PKEY_CTX_new(pkey, e);
 100         if (ctx == NULL) {
 101             ERR_print_errors(bio_err);
 102             goto end;
 103         }
 104
 105         r = EVP_PKEY_param_check(ctx);
 106
 107         if (r == 1) {
 108             BIO_printf(out, "Parameters are valid\n");
 109         } else {
 110             /*
 111              * Note: at least for RSA keys if this function returns
 112              * -1, there will be no error reasons.
 113              */
 114             unsigned long err;
 115
 116             BIO_printf(out, "Parameters are invalid\n");
 117
 118             while ((err = ERR_peek_error()) != 0) {
 119                 BIO_printf(out, "Detailed error: %s\n",
 120                            ERR_reason_error_string(err));
 121                 ERR_get_error(); /* remove err from error stack */
 122             }
 123         }
 124         EVP_PKEY_CTX_free(ctx);
 125     }
 126
 127     if (!noout)
 128         PEM_write_bio_Parameters(out, pkey);
 129
 130     if (text)
 131         EVP_PKEY_print_params(out, pkey, 0, NULL);
 132
 133     ret = 0;
 134
 135  end:
 136     EVP_PKEY_free(pkey);
 137     release_engine(e);
 138     BIO_free_all(out);
 139     BIO_free(in);
 140
 141     return ret;
 142 }