lib/minitasn1/errors.c

   1 /*
   2  * Copyright (C) 2002-2012 Free Software Foundation, Inc.
   3  *
   4  * This file is part of LIBTASN1.
   5  *
   6  * The LIBTASN1 library is free software; you can redistribute it
   7  * and/or modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19  * 02110-1301, USA
  20  */
  21
  22 #include <int.h>
  23 #ifdef STDC_HEADERS
  24 #include <stdarg.h>
  25 #endif
  26
  27 #define LIBTASN1_ERROR_ENTRY(name) { #name, name }
  28
  29 struct libtasn1_error_entry
  30 {
  31   const char *name;
  32   int number;
  33 };
  34 typedef struct libtasn1_error_entry libtasn1_error_entry;
  35
  36 static const libtasn1_error_entry error_algorithms[] = {
  37   LIBTASN1_ERROR_ENTRY (ASN1_SUCCESS),
  38   LIBTASN1_ERROR_ENTRY (ASN1_FILE_NOT_FOUND),
  39   LIBTASN1_ERROR_ENTRY (ASN1_ELEMENT_NOT_FOUND),
  40   LIBTASN1_ERROR_ENTRY (ASN1_IDENTIFIER_NOT_FOUND),
  41   LIBTASN1_ERROR_ENTRY (ASN1_DER_ERROR),
  42   LIBTASN1_ERROR_ENTRY (ASN1_VALUE_NOT_FOUND),
  43   LIBTASN1_ERROR_ENTRY (ASN1_GENERIC_ERROR),
  44   LIBTASN1_ERROR_ENTRY (ASN1_VALUE_NOT_VALID),
  45   LIBTASN1_ERROR_ENTRY (ASN1_TAG_ERROR),
  46   LIBTASN1_ERROR_ENTRY (ASN1_TAG_IMPLICIT),
  47   LIBTASN1_ERROR_ENTRY (ASN1_ERROR_TYPE_ANY),
  48   LIBTASN1_ERROR_ENTRY (ASN1_SYNTAX_ERROR),
  49   LIBTASN1_ERROR_ENTRY (ASN1_MEM_ERROR),
  50   LIBTASN1_ERROR_ENTRY (ASN1_MEM_ALLOC_ERROR),
  51   LIBTASN1_ERROR_ENTRY (ASN1_DER_OVERFLOW),
  52   LIBTASN1_ERROR_ENTRY (ASN1_NAME_TOO_LONG),
  53   LIBTASN1_ERROR_ENTRY (ASN1_ARRAY_ERROR),
  54   LIBTASN1_ERROR_ENTRY (ASN1_ELEMENT_NOT_EMPTY),
  55   {0, 0}
  56 };
  57
  58 /**
  59  * asn1_perror:
  60  * @error: is an error returned by a libtasn1 function.
  61  *
  62  * Prints a string to stderr with a description of an error.  This
  63  * function is like perror().  The only difference is that it accepts
  64  * an error returned by a libtasn1 function.
  65  *
  66  * This function replaces libtasn1_perror() in older libtasn1.
  67  *
  68  * Since: 1.6
  69  **/
  70 void
  71 asn1_perror (int error)
  72 {
  73   const char *str = asn1_strerror (error);
  74   fprintf (stderr, "LIBTASN1 ERROR: %s\n", str ? str : "(null)");
  75 }
  76
  77 /**
  78  * asn1_strerror:
  79  * @error: is an error returned by a libtasn1 function.
  80  *
  81  * Returns a string with a description of an error.  This function is
  82  * similar to strerror.  The only difference is that it accepts an
  83  * error (number) returned by a libtasn1 function.
  84  *
  85  * This function replaces libtasn1_strerror() in older libtasn1.
  86  *
  87  * Returns: Pointer to static zero-terminated string describing error
  88  *   code.
  89  *
  90  * Since: 1.6
  91  **/
  92 const char *
  93 asn1_strerror (int error)
  94 {
  95   const libtasn1_error_entry *p;
  96
  97   for (p = error_algorithms; p->name != NULL; p++)
  98     if (p->number == error)
  99       return p->name + sizeof ("ASN1_") - 1;
 100
 101   return NULL;
 102 }