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
|
/*
* Copyright 2023 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#define OSSL_FORCE_ERR_STATE
#include <openssl/err.h>
#include "err_local.h"
/*
* Save and restore error state.
* We are using CRYPTO_zalloc(.., NULL, 0) instead of OPENSSL_malloc() in
* these functions to prevent mem alloc error loop.
*/
ERR_STATE *OSSL_ERR_STATE_new(void)
{
return CRYPTO_zalloc(sizeof(ERR_STATE), NULL, 0);
}
void OSSL_ERR_STATE_save(ERR_STATE *es)
{
size_t i;
ERR_STATE *thread_es;
if (es == NULL)
return;
for (i = 0; i < ERR_NUM_ERRORS; i++)
err_clear(es, i, 1);
thread_es = ossl_err_get_state_int();
if (thread_es == NULL)
return;
memcpy(es, thread_es, sizeof(*es));
/* Taking over the pointers, just clear the thread state. */
memset(thread_es, 0, sizeof(*thread_es));
}
void OSSL_ERR_STATE_save_to_mark(ERR_STATE *es)
{
size_t i, j, count;
int top;
ERR_STATE *thread_es;
if (es == NULL)
return;
thread_es = ossl_err_get_state_int();
if (thread_es == NULL) {
for (i = 0; i < ERR_NUM_ERRORS; ++i)
err_clear(es, i, 1);
es->top = es->bottom = 0;
return;
}
/* Determine number of errors we are going to move. */
for (count = 0, top = thread_es->top;
thread_es->bottom != top
&& thread_es->err_marks[top] == 0;
++count)
top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
/* Move the errors, preserving order. */
for (i = 0, j = top; i < count; ++i) {
j = (j + 1) % ERR_NUM_ERRORS;
err_clear(es, i, 1);
/* Move the error entry to the given ERR_STATE. */
es->err_flags[i] = thread_es->err_flags[j];
es->err_marks[i] = 0;
es->err_buffer[i] = thread_es->err_buffer[j];
es->err_data[i] = thread_es->err_data[j];
es->err_data_size[i] = thread_es->err_data_size[j];
es->err_data_flags[i] = thread_es->err_data_flags[j];
es->err_file[i] = thread_es->err_file[j];
es->err_line[i] = thread_es->err_line[j];
es->err_func[i] = thread_es->err_func[j];
thread_es->err_flags[j] = 0;
thread_es->err_buffer[j] = 0;
thread_es->err_data[j] = NULL;
thread_es->err_data_size[j] = 0;
thread_es->err_data_flags[j] = 0;
thread_es->err_file[j] = NULL;
thread_es->err_line[j] = 0;
thread_es->err_func[j] = NULL;
}
if (i > 0) {
thread_es->top = top;
/* If we moved anything, es's stack always starts at [0]. */
es->top = i - 1;
es->bottom = ERR_NUM_ERRORS - 1;
} else {
/* Didn't move anything - empty stack */
es->top = es->bottom = 0;
}
/* Erase extra space as a precaution. */
for (; i < ERR_NUM_ERRORS; ++i)
err_clear(es, i, 1);
}
void OSSL_ERR_STATE_restore(const ERR_STATE *es)
{
size_t i;
ERR_STATE *thread_es;
if (es == NULL || es->bottom == es->top)
return;
thread_es = ossl_err_get_state_int();
if (thread_es == NULL)
return;
for (i = (size_t)es->bottom; i != (size_t)es->top;) {
size_t top;
i = (i + 1) % ERR_NUM_ERRORS;
if ((es->err_flags[i] & ERR_FLAG_CLEAR) != 0)
continue;
err_get_slot(thread_es);
top = thread_es->top;
err_clear(thread_es, top, 0);
thread_es->err_flags[top] = es->err_flags[i];
thread_es->err_buffer[top] = es->err_buffer[i];
err_set_debug(thread_es, top, es->err_file[i], es->err_line[i],
es->err_func[i]);
if (es->err_data[i] != NULL && es->err_data_size[i] != 0) {
void *data;
size_t data_sz = es->err_data_size[i];
data = CRYPTO_malloc(data_sz, NULL, 0);
if (data != NULL) {
memcpy(data, es->err_data[i], data_sz);
err_set_data(thread_es, top, data, data_sz,
es->err_data_flags[i] | ERR_TXT_MALLOCED);
}
} else {
err_clear_data(thread_es, top, 0);
}
}
}
|
