apps/errstr.c

   1 /*
   2  * Copyright 1995-2018 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 <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
  26     OPT_SECTION("General"),
  27     {"help", OPT_HELP, '-', "Display this summary"},
  28
  29     OPT_PARAMETERS(),
  30     {"errnum", 0, 0, "Error number(s) to decode"},
  31     {NULL}
  32 };
  33
  34 int errstr_main(int argc, char **argv)
  35 {
  36     OPTION_CHOICE o;
  37     char buf[256], *prog;
  38     int ret = 1;
  39     unsigned long l;
  40
  41     prog = opt_init(argc, argv, errstr_options);
  42     while ((o = opt_next()) != OPT_EOF) {
  43         switch (o) {
  44         case OPT_EOF:
  45         case OPT_ERR:
  46             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  47             goto end;
  48         case OPT_HELP:
  49             opt_help(errstr_options);
  50             ret = 0;
  51             goto end;
  52         }
  53     }
  54
  55     ret = 0;
  56     for (argv = opt_rest(); *argv; argv++) {
  57         if (sscanf(*argv, "%lx", &l) == 0) {
  58             ret++;
  59         } else {
  60             /* We're not really an SSL application so this won't auto-init, but
  61              * we're still interested in SSL error strings
  62              */
  63             OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS
  64                              | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
  65             ERR_error_string_n(l, buf, sizeof(buf));
  66             BIO_printf(bio_out, "%s\n", buf);
  67         }
  68     }
  69  end:
  70     return ret;
  71 }