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      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     /*
     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 
     62     /* All remaining arg are error code. */
     63     ret = 0;
     64     for (argv = opt_rest(); *argv != NULL; argv++) {
     65         if (sscanf(*argv, "%lx", &l) <= 0) {
     66             ret++;
     67         } else {
     68             ERR_error_string_n(l, buf, sizeof(buf));
     69             BIO_printf(bio_out, "%s\n", buf);
     70         }
     71     }
     72  end:
     73     return ret;
     74 }
     75