1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/**
* \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 void aesni_fill_string(char* dest, size_t dest_size, const char* src)
{
strncpy(dest, src, dest_size);
dest[dest_size - 1] = '\0';
}
static const char* aesni_strerror_messages[] =
{
"Success",
"Invalid argument value NULL",
"Couldn't parse",
"Invalid PKCS7 padding (wrong key?)",
"Not implemented",
"Missing padding",
"Couldn't allocate memory",
};
const char* aesni_strerror(AesNI_StatusCode ec)
{
return aesni_strerror_messages[ec];
}
static size_t aesni_format_error_strerror(
const AesNI_ErrorDetails* err_details,\
char* dest,
size_t dest_size)
{
const AesNI_StatusCode ec = aesni_get_error_code(err_details);
const char* const msg = aesni_strerror(ec);
if (dest == NULL)
return strlen(msg) + 1;
aesni_fill_string(dest, dest_size, msg);
return strlen(dest);
}
static size_t aesni_format_null_argument_error(
const AesNI_ErrorDetails* err_details,
char* dest,
size_t dest_size)
{
static const char* const fmt = "Invalid argument value NULL for parameter '%s'";
const char* const param_name = err_details->params.null_arg.param_name;
if (dest == NULL && dest_size == 0)
return _snprintf(NULL, 0, fmt, param_name) + 1;
_snprintf(dest, dest_size, fmt, param_name);
return strlen(dest);
}
static size_t aesni_format_parse_error(
const AesNI_ErrorDetails* err_details,
char* dest,
size_t dest_size)
{
static const char* const fmt = "Couldn't parse '%s' (possibly not complete input) as %s";
const char* const src = err_details->params.parse_error.src;
const char* const what = err_details->params.parse_error.what;
if (dest == NULL)
return _snprintf(NULL, 0, fmt, src, what) + 1;
_snprintf(dest, dest_size, fmt, src, what);
return strlen(dest);
}
static size_t aesni_format_not_implemented_error(
const AesNI_ErrorDetails* err_details,
char* dest,
size_t dest_size)
{
static const char* const fmt = "Not implemented: %s";
const char* const src = err_details->params.not_implemented.what;
if (dest == NULL)
return _snprintf(NULL, 0, fmt, src) + 1;
_snprintf(dest, dest_size, fmt, src);
return strlen(dest);
}
typedef size_t (*AesNI_ErrorFormatter)(const AesNI_ErrorDetails*, char*, size_t);
static AesNI_ErrorFormatter err_formatters[] =
{
&aesni_format_error_strerror,
&aesni_format_null_argument_error,
&aesni_format_parse_error,
&aesni_format_error_strerror,
&aesni_format_not_implemented_error,
&aesni_format_error_strerror,
&aesni_format_error_strerror,
};
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);
}
#ifdef WIN32
#include <Windows.h>
static void aesni_collect_call_stack(AesNI_ErrorDetails* err_details)
{
err_details->call_stack_size = CaptureStackBackTrace(1, AESNI_MAX_CALL_STACK_LENGTH, err_details->call_stack, NULL);
}
#else
static void aesni_collect_call_stack(AesNI_ErrorDetails* err_details)
{
err_details->call_stack_size = 0;
}
#endif
static AesNI_StatusCode aesni_make_error(
AesNI_ErrorDetails* err_details,
AesNI_StatusCode ec)
{
if (err_details == NULL)
return ec;
if (aesni_is_error(ec))
aesni_collect_call_stack(err_details);
return err_details->ec = ec;
}
AesNI_StatusCode aesni_success(
AesNI_ErrorDetails* err_details)
{
return aesni_make_error(err_details, AESNI_SUCCESS);
}
AesNI_StatusCode aesni_error_null_argument(
AesNI_ErrorDetails* err_details,
const char* param_name)
{
AesNI_StatusCode status = aesni_make_error(err_details, AESNI_NULL_ARGUMENT_ERROR);
if (err_details != NULL)
aesni_fill_string(
err_details->params.null_arg.param_name,
sizeof(err_details->params.null_arg.param_name), param_name);
return status;
}
AesNI_StatusCode aesni_error_parse(
AesNI_ErrorDetails* err_details,
const char* src,
const char* what)
{
AesNI_StatusCode status = aesni_make_error(err_details, AESNI_PARSE_ERROR);
if (err_details != NULL)
{
aesni_fill_string(
err_details->params.parse_error.src,
sizeof(err_details->params.parse_error.src), src);
aesni_fill_string(
err_details->params.parse_error.what,
sizeof(err_details->params.parse_error.what), what);
}
return status;
}
AesNI_StatusCode aesni_error_invalid_pkcs7_padding(
AesNI_ErrorDetails* err_details)
{
return aesni_make_error(err_details, AESNI_INVALID_PKCS7_PADDING_ERROR);
}
AesNI_StatusCode aesni_error_not_implemented(
AesNI_ErrorDetails* err_details,
const char* what)
{
AesNI_StatusCode status = aesni_make_error(err_details, AESNI_NOT_IMPLEMENTED_ERROR);
if (err_details != NULL)
aesni_fill_string(
err_details->params.not_implemented.what,
sizeof(err_details->params.not_implemented.what), what);
return status;
}
AesNI_StatusCode aesni_error_missing_padding(
AesNI_ErrorDetails* err_details)
{
return aesni_make_error(err_details, AESNI_MISSING_PADDING_ERROR);
}
AesNI_StatusCode aesni_error_memory_allocation(
AesNI_ErrorDetails* err_details)
{
return aesni_make_error(err_details, AESNI_MEMORY_ALLOCATION_ERROR);
}
|
