apps/errstr.c

   1 /*
   2  * Copyright 1995-2017 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 <stdlib.h>
  12 #include <string.h>
  13 #include "apps.h"
  14 #include <openssl/bio.h>
  15 #include <openssl/err.h>
  16 #include <openssl/ssl.h>
  17
  18 typedef enum OPTION_choice {
  19     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP
  20 } OPTION_CHOICE;
  21
  22 const OPTIONS errstr_options[] = {
  23     {OPT_HELP_STR, 1, '-', "Usage: %s [options] errnum...\n"},
  24     {OPT_HELP_STR, 1, '-', "  errnum  Error number\n"},
  25     {"help", OPT_HELP, '-', "Display this summary"},
  26     {NULL}
  27 };
  28
  29 int errstr_main(int argc, char **argv)
  30 {
  31     OPTION_CHOICE o;
  32     char buf[256], *prog;
  33     int ret = 1;
  34     unsigned long l;
  35
  36     prog = opt_init(argc, argv, errstr_options);
  37     while ((o = opt_next()) != OPT_EOF) {
  38         switch (o) {
  39         case OPT_EOF:
  40         case OPT_ERR:
  41             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  42             goto end;
  43         case OPT_HELP:
  44             opt_help(errstr_options);
  45             ret = 0;
  46             goto end;
  47         }
  48     }
  49
  50     ret = 0;
  51     for (argv = opt_rest(); *argv; argv++) {
  52         if (sscanf(*argv, "%lx", &l) == 0) {
  53             ret++;
  54         } else {
  55             /* We're not really an SSL application so this won't auto-init, but
  56              * we're still interested in SSL error strings
  57              */
  58             OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS
  59                              | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
  60             ERR_error_string_n(l, buf, sizeof buf);
  61             BIO_printf(bio_out, "%s\n", buf);
  62         }
  63     }
  64  end:
  65     return (ret);
  66 }