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
|
/*
* Copyright 2019 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
*/
#include "e_os.h" /* strcasecmp */
#include "internal/namemap.h"
#include <openssl/lhash.h>
#include "internal/lhash.h" /* openssl_lh_strcasehash */
/*-
* The namenum entry
* =================
*/
typedef struct {
char *name;
int number;
} NAMENUM_ENTRY;
DEFINE_LHASH_OF(NAMENUM_ENTRY);
/*-
* The namemap itself
* ==================
*/
struct ossl_namemap_st {
/* Flags */
unsigned int stored:1; /* If 1, it's stored in a library context */
CRYPTO_RWLOCK *lock;
LHASH_OF(NAMENUM_ENTRY) *namenum; /* Name->number mapping */
int max_number; /* Current max number */
};
/* LHASH callbacks */
static unsigned long namenum_hash(const NAMENUM_ENTRY *n)
{
return openssl_lh_strcasehash(n->name);
}
static int namenum_cmp(const NAMENUM_ENTRY *a, const NAMENUM_ENTRY *b)
{
return strcasecmp(a->name, b->name);
}
static void namenum_free(NAMENUM_ENTRY *n)
{
if (n != NULL)
OPENSSL_free(n->name);
OPENSSL_free(n);
}
/* OPENSSL_CTX_METHOD functions for a namemap stored in a library context */
static void *stored_namemap_new(OPENSSL_CTX *libctx)
{
OSSL_NAMEMAP *namemap = ossl_namemap_new();
if (namemap != NULL)
namemap->stored = 1;
return namemap;
}
static void stored_namemap_free(void *vnamemap)
{
OSSL_NAMEMAP *namemap = vnamemap;
/* Pretend it isn't stored, or ossl_namemap_free() will do nothing */
namemap->stored = 0;
ossl_namemap_free(namemap);
}
static const OPENSSL_CTX_METHOD stored_namemap_method = {
stored_namemap_new,
stored_namemap_free,
};
/*-
* API functions
* =============
*/
OSSL_NAMEMAP *ossl_namemap_stored(OPENSSL_CTX *libctx)
{
return openssl_ctx_get_data(libctx, OPENSSL_CTX_NAMEMAP_INDEX,
&stored_namemap_method);
}
OSSL_NAMEMAP *ossl_namemap_new(void)
{
OSSL_NAMEMAP *namemap;
if ((namemap = OPENSSL_zalloc(sizeof(*namemap))) != NULL
&& (namemap->lock = CRYPTO_THREAD_lock_new()) != NULL
&& (namemap->namenum =
lh_NAMENUM_ENTRY_new(namenum_hash, namenum_cmp)) != NULL)
return namemap;
ossl_namemap_free(namemap);
return NULL;
}
void ossl_namemap_free(OSSL_NAMEMAP *namemap)
{
if (namemap == NULL || namemap->stored)
return;
lh_NAMENUM_ENTRY_doall(namemap->namenum, namenum_free);
lh_NAMENUM_ENTRY_free(namemap->namenum);
CRYPTO_THREAD_lock_free(namemap->lock);
OPENSSL_free(namemap);
}
typedef struct doall_names_data_st {
int number;
void (*fn)(const char *name, void *data);
void *data;
} DOALL_NAMES_DATA;
static void do_name(const NAMENUM_ENTRY *namenum, DOALL_NAMES_DATA *data)
{
if (namenum->number == data->number)
data->fn(namenum->name, data->data);
}
IMPLEMENT_LHASH_DOALL_ARG_CONST(NAMENUM_ENTRY, DOALL_NAMES_DATA);
void ossl_namemap_doall_names(const OSSL_NAMEMAP *namemap, int number,
void (*fn)(const char *name, void *data),
void *data)
{
DOALL_NAMES_DATA cbdata;
cbdata.number = number;
cbdata.fn = fn;
cbdata.data = data;
CRYPTO_THREAD_read_lock(namemap->lock);
lh_NAMENUM_ENTRY_doall_DOALL_NAMES_DATA(namemap->namenum, do_name,
&cbdata);
CRYPTO_THREAD_unlock(namemap->lock);
}
int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
{
NAMENUM_ENTRY *namenum_entry, namenum_tmpl;
int number = 0;
#ifndef FIPS_MODE
if (namemap == NULL)
namemap = ossl_namemap_stored(NULL);
#endif
if (namemap == NULL)
return 0;
namenum_tmpl.name = (char *)name;
namenum_tmpl.number = 0;
CRYPTO_THREAD_read_lock(namemap->lock);
namenum_entry =
lh_NAMENUM_ENTRY_retrieve(namemap->namenum, &namenum_tmpl);
if (namenum_entry != NULL)
number = namenum_entry->number;
CRYPTO_THREAD_unlock(namemap->lock);
return number;
}
int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name)
{
NAMENUM_ENTRY *namenum = NULL;
int tmp_number;
#ifndef FIPS_MODE
if (namemap == NULL)
namemap = ossl_namemap_stored(NULL);
#endif
if (name == NULL || namemap == NULL)
return 0;
if ((tmp_number = ossl_namemap_name2num(namemap, name)) != 0)
return tmp_number; /* Pretend success */
CRYPTO_THREAD_write_lock(namemap->lock);
if ((namenum = OPENSSL_zalloc(sizeof(*namenum))) == NULL
|| (namenum->name = OPENSSL_strdup(name)) == NULL)
goto err;
namenum->number = tmp_number =
number != 0 ? number : ++namemap->max_number;
(void)lh_NAMENUM_ENTRY_insert(namemap->namenum, namenum);
if (lh_NAMENUM_ENTRY_error(namemap->namenum))
goto err;
CRYPTO_THREAD_unlock(namemap->lock);
return tmp_number;
err:
namenum_free(namenum);
CRYPTO_THREAD_unlock(namemap->lock);
return 0;
}
|
