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/**
* \file
* \author Egor Tensin <Egor.Tensin@gmail.com>
* \date 2015
* \copyright This file is licensed under the terms of the MIT License.
* See LICENSE.txt for details.
*/
#include <aesni/all.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static const char* err_msgs[] =
{
"Success",
"Invalid argument value NULL",
"Invalid PKCS7 padding (wrong key?)",
};
const char* aesni_strerror(AesNI_ErrorCode ec)
{
return err_msgs[ec];
}
static size_t aesni_format_error_simple(
const AesNI_ErrorDetails* err_details,\
char* dest,
size_t dest_size)
{
const AesNI_ErrorCode ec = aesni_get_error_code(err_details);
const char* const msg = aesni_strerror(ec);
if (dest == NULL && dest_size == 0)
return strlen(msg) + 1;
strncpy(dest, msg, dest_size);
dest[dest_size - 1] = '\0';
return strlen(dest);
}
static size_t aesni_format_error_null_argument(
const AesNI_ErrorDetails* err_details,
char* dest,
size_t dest_size)
{
static const char* const fmt = "Invalid argument value NULL (argument name: '%s')";
const char* const arg_name = err_details->params.null_arg.arg_name;
if (dest == NULL && dest_size == 0)
return _snprintf(NULL, 0, fmt, arg_name) + 1;
_snprintf(dest, dest_size, fmt, arg_name);
return strlen(dest);
}
typedef size_t (*AesNI_ErrorFormatter)(const AesNI_ErrorDetails*, char*, size_t);
static AesNI_ErrorFormatter err_formatters[] =
{
&aesni_format_error_simple,
&aesni_format_error_null_argument,
&aesni_format_error_simple,
};
size_t aesni_format_error(
const AesNI_ErrorDetails* err_details,
char* dest,
size_t dest_size)
{
assert(err_details);
return err_formatters[err_details->ec](err_details, dest, dest_size);
}
static void aesni_make_error(
AesNI_ErrorDetails* err_details,
AesNI_ErrorCode ec)
{
if (err_details == NULL)
return;
err_details->ec = ec;
}
void aesni_make_error_success(
AesNI_ErrorDetails* err_details)
{
if (err_details == NULL)
return;
aesni_make_error(err_details, AESNI_ERROR_SUCCESS);
}
void aesni_make_error_null_argument(
AesNI_ErrorDetails* err_details,
const char* arg_name)
{
if (err_details == NULL)
return;
aesni_make_error(err_details, AESNI_ERROR_NULL_ARGUMENT);
const size_t arg_name_size = sizeof(err_details->params.null_arg.arg_name);
strncpy(err_details->params.null_arg.arg_name, arg_name, arg_name_size);
err_details->params.null_arg.arg_name[arg_name_size - 1] = '\0';
}
void aesni_make_error_invalid_pkcs7_padding(
AesNI_ErrorDetails* err_details)
{
if (err_details == NULL)
return;
aesni_make_error(err_details, AESNI_ERROR_INVALID_PKCS7_PADDING);
}
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