xref: /openssl/apps/errstr.c (revision 322517d8)
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 
errstr_main(int argc,char ** argv)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