apps/errstr.c

   1 /*
   2  * Copyright 1995-2018 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 "progs.h"
  15 #include <openssl/bio.h>
  16 #include <openssl/err.h>
  17 #include <openssl/ssl.h>
  18
  19 typedef enum OPTION_choice {
  20     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP
  21 } OPTION_CHOICE;
  22
  23 const OPTIONS errstr_options[] = {
  24     {OPT_HELP_STR, 1, '-', "Usage: %s [options] errnum...\n"},
  25     {OPT_HELP_STR, 1, '-', "  errnum  Error number\n"},
  26     {"help", OPT_HELP, '-', "Display this summary"},
  27     {NULL}
  28 };
  29
  30 int errstr_main(int argc, char **argv)
  31 {
  32     OPTION_CHOICE o;
  33     char buf[256], *prog;
  34     int ret = 1;
  35     unsigned long l;
  36
  37     prog = opt_init(argc, argv, errstr_options);
  38     while ((o = opt_next()) != OPT_EOF) {
  39         switch (o) {
  40         case OPT_EOF:
  41         case OPT_ERR:
  42             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  43             goto end;
  44         case OPT_HELP:
  45             opt_help(errstr_options);
  46             ret = 0;
  47             goto end;
  48         }
  49     }
  50
  51     ret = 0;
  52     for (argv = opt_rest(); *argv; argv++) {
  53         if (sscanf(*argv, "%lx", &l) == 0) {
  54             ret++;
  55         } else {
  56             /* We're not really an SSL application so this won't auto-init, but
  57              * we're still interested in SSL error strings
  58              */
  59             OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS
  60                              | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
  61             ERR_error_string_n(l, buf, sizeof(buf));
  62             BIO_printf(bio_out, "%s\n", buf);
  63         }
  64     }
  65  end:
  66     return ret;
  67 }