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/* error.c - liboath error handling helpers.
* Copyright (C) 2011-2013 Simon Josefsson
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <config.h>
#include "oath.h"
#define ERR(name, desc) { name, #name, desc }
typedef struct
{
int rc;
const char *name;
const char *description;
} err_t;
static const err_t errors[] = {
ERR (OATH_OK, "Successful return"),
ERR (OATH_CRYPTO_ERROR, "Internal error in crypto functions"),
ERR (OATH_INVALID_DIGITS, "Unsupported number of OTP digits"),
ERR (OATH_PRINTF_ERROR, "Error from system printf call"),
ERR (OATH_INVALID_HEX, "Hex string is invalid"),
ERR (OATH_TOO_SMALL_BUFFER, "The output buffer is too small"),
ERR (OATH_INVALID_OTP, "The OTP is not valid"),
ERR (OATH_REPLAYED_OTP, "The OTP has been replayed"),
ERR (OATH_BAD_PASSWORD, "The password does not match"),
ERR (OATH_INVALID_COUNTER, "The counter value is corrupt"),
ERR (OATH_INVALID_TIMESTAMP, "The timestamp is corrupt"),
ERR (OATH_NO_SUCH_FILE, "The supplied filename does not exist"),
ERR (OATH_UNKNOWN_USER, "Cannot find information about user"),
ERR (OATH_FILE_SEEK_ERROR, "System error when seeking in file"),
ERR (OATH_FILE_CREATE_ERROR, "System error when creating file"),
ERR (OATH_FILE_LOCK_ERROR, "System error when locking file"),
ERR (OATH_FILE_RENAME_ERROR, "System error when renaming file"),
ERR (OATH_FILE_UNLINK_ERROR, "System error when removing file"),
ERR (OATH_TIME_ERROR, "System error for time manipulation"),
ERR (OATH_STRCMP_ERROR, "A strcmp callback returned an error"),
ERR (OATH_INVALID_BASE32, "Base32 string is invalid"),
ERR (OATH_BASE32_OVERFLOW, "Base32 encoding would overflow"),
ERR (OATH_MALLOC_ERROR, "Memory allocation failed"),
ERR (OATH_FILE_FLUSH_ERROR, "System error when flushing file buffer"),
ERR (OATH_FILE_SYNC_ERROR, "System error when syncing file to disk"),
ERR (OATH_FILE_CLOSE_ERROR, "System error when closing file")
};
/**
* oath_strerror:
* @err: liboath error code
*
* Convert return code to human readable string explanation of the
* reason for the particular error code.
*
* This string can be used to output a diagnostic message to the user.
*
* This function is one of few in the library that can be used without
* a successful call to oath_init().
*
* Return value: Returns a pointer to a statically allocated string
* containing an explanation of the error code @err.
*
* Since: 1.8.0
**/
const char *
oath_strerror (int err)
{
static const char *unknown = "Liboath unknown error";
const char *p;
if (-err < 0 || -err >= (int) (sizeof (errors) / sizeof (errors[0])))
return unknown;
p = errors[-err].description;
if (!p)
p = unknown;
return p;
}
/**
* oath_strerror_name:
* @err: liboath error code
*
* Convert return code to human readable string representing the error
* code symbol itself. For example, oath_strerror_name(%OATH_OK)
* returns the string "OATH_OK".
*
* This string can be used to output a diagnostic message to the user.
*
* This function is one of few in the library that can be used without
* a successful call to oath_init().
*
* Return value: Returns a pointer to a statically allocated string
* containing a string version of the error code @err, or NULL if
* the error code is not known.
*
* Since: 1.8.0
**/
const char *
oath_strerror_name (int err)
{
if (-err < 0 || -err >= (int) (sizeof (errors) / sizeof (errors[0])))
return NULL;
return errors[-err].name;
}
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