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
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
/*
* Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2019, Oracle and/or its affiliates. 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 <string.h>
#include <openssl/crypto.h>
#include <openssl/lhash.h>
#include "crypto/lhash.h"
#include "property_local.h"
/*
* Property strings are a consolidation of all strings seen by the property
* subsystem. There are two name spaces to keep property names separate from
* property values (numeric values are not expected to be cached however).
* They allow a rapid conversion from a string to a unique index and any
* subsequent string comparison can be done via an integer compare.
*
* This implementation uses OpenSSL's standard hash table. There are more
* space and time efficient algorithms if this becomes a bottleneck.
*/
typedef struct {
const char *s;
OSSL_PROPERTY_IDX idx;
char body[1];
} PROPERTY_STRING;
DEFINE_LHASH_OF(PROPERTY_STRING);
typedef LHASH_OF(PROPERTY_STRING) PROP_TABLE;
typedef struct {
CRYPTO_RWLOCK *lock;
PROP_TABLE *prop_names;
PROP_TABLE *prop_values;
OSSL_PROPERTY_IDX prop_name_idx;
OSSL_PROPERTY_IDX prop_value_idx;
#ifndef OPENSSL_SMALL_FOOTPRINT
STACK_OF(OPENSSL_CSTRING) *prop_namelist;
STACK_OF(OPENSSL_CSTRING) *prop_valuelist;
#endif
} PROPERTY_STRING_DATA;
static unsigned long property_hash(const PROPERTY_STRING *a)
{
return OPENSSL_LH_strhash(a->s);
}
static int property_cmp(const PROPERTY_STRING *a, const PROPERTY_STRING *b)
{
return strcmp(a->s, b->s);
}
static void property_free(PROPERTY_STRING *ps)
{
OPENSSL_free(ps);
}
static void property_table_free(PROP_TABLE **pt)
{
PROP_TABLE *t = *pt;
if (t != NULL) {
lh_PROPERTY_STRING_doall(t, &property_free);
lh_PROPERTY_STRING_free(t);
*pt = NULL;
}
}
static void property_string_data_free(void *vpropdata)
{
PROPERTY_STRING_DATA *propdata = vpropdata;
if (propdata == NULL)
return;
CRYPTO_THREAD_lock_free(propdata->lock);
property_table_free(&propdata->prop_names);
property_table_free(&propdata->prop_values);
#ifndef OPENSSL_SMALL_FOOTPRINT
sk_OPENSSL_CSTRING_free(propdata->prop_namelist);
sk_OPENSSL_CSTRING_free(propdata->prop_valuelist);
propdata->prop_namelist = propdata->prop_valuelist = NULL;
#endif
propdata->prop_name_idx = propdata->prop_value_idx = 0;
OPENSSL_free(propdata);
}
static void *property_string_data_new(OSSL_LIB_CTX *ctx) {
PROPERTY_STRING_DATA *propdata = OPENSSL_zalloc(sizeof(*propdata));
if (propdata == NULL)
return NULL;
propdata->lock = CRYPTO_THREAD_lock_new();
propdata->prop_names = lh_PROPERTY_STRING_new(&property_hash,
&property_cmp);
propdata->prop_values = lh_PROPERTY_STRING_new(&property_hash,
&property_cmp);
#ifndef OPENSSL_SMALL_FOOTPRINT
propdata->prop_namelist = sk_OPENSSL_CSTRING_new_null();
propdata->prop_valuelist = sk_OPENSSL_CSTRING_new_null();
#endif
if (propdata->lock == NULL
#ifndef OPENSSL_SMALL_FOOTPRINT
|| propdata->prop_namelist == NULL
|| propdata->prop_valuelist == NULL
#endif
|| propdata->prop_names == NULL
|| propdata->prop_values == NULL) {
property_string_data_free(propdata);
return NULL;
}
return propdata;
}
static const OSSL_LIB_CTX_METHOD property_string_data_method = {
OSSL_LIB_CTX_METHOD_DEFAULT_PRIORITY,
property_string_data_new,
property_string_data_free,
};
static PROPERTY_STRING *new_property_string(const char *s,
OSSL_PROPERTY_IDX *pidx)
{
const size_t l = strlen(s);
PROPERTY_STRING *ps = OPENSSL_malloc(sizeof(*ps) + l);
if (ps != NULL) {
memcpy(ps->body, s, l + 1);
ps->s = ps->body;
ps->idx = ++*pidx;
if (ps->idx == 0) {
OPENSSL_free(ps);
return NULL;
}
}
return ps;
}
static OSSL_PROPERTY_IDX ossl_property_string(OSSL_LIB_CTX *ctx, int name,
int create, const char *s)
{
PROPERTY_STRING p, *ps, *ps_new;
PROP_TABLE *t;
OSSL_PROPERTY_IDX *pidx;
PROPERTY_STRING_DATA *propdata
= ossl_lib_ctx_get_data(ctx, OSSL_LIB_CTX_PROPERTY_STRING_INDEX,
&property_string_data_method);
if (propdata == NULL)
return 0;
t = name ? propdata->prop_names : propdata->prop_values;
p.s = s;
if (!CRYPTO_THREAD_read_lock(propdata->lock)) {
ERR_raise(ERR_LIB_CRYPTO, ERR_R_UNABLE_TO_GET_READ_LOCK);
return 0;
}
ps = lh_PROPERTY_STRING_retrieve(t, &p);
if (ps == NULL && create) {
CRYPTO_THREAD_unlock(propdata->lock);
if (!CRYPTO_THREAD_write_lock(propdata->lock)) {
ERR_raise(ERR_LIB_CRYPTO, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
return 0;
}
pidx = name ? &propdata->prop_name_idx : &propdata->prop_value_idx;
ps = lh_PROPERTY_STRING_retrieve(t, &p);
if (ps == NULL && (ps_new = new_property_string(s, pidx)) != NULL) {
#ifndef OPENSSL_SMALL_FOOTPRINT
STACK_OF(OPENSSL_CSTRING) *slist;
slist = name ? propdata->prop_namelist : propdata->prop_valuelist;
if (sk_OPENSSL_CSTRING_push(slist, ps_new->s) <= 0) {
property_free(ps_new);
CRYPTO_THREAD_unlock(propdata->lock);
return 0;
}
#endif
lh_PROPERTY_STRING_insert(t, ps_new);
if (lh_PROPERTY_STRING_error(t)) {
/*-
* Undo the previous push which means also decrementing the
* index and freeing the allocated storage.
*/
#ifndef OPENSSL_SMALL_FOOTPRINT
sk_OPENSSL_CSTRING_pop(slist);
#endif
property_free(ps_new);
--*pidx;
CRYPTO_THREAD_unlock(propdata->lock);
return 0;
}
ps = ps_new;
}
}
CRYPTO_THREAD_unlock(propdata->lock);
return ps != NULL ? ps->idx : 0;
}
#ifdef OPENSSL_SMALL_FOOTPRINT
struct find_str_st {
const char *str;
OSSL_PROPERTY_IDX idx;
};
static void find_str_fn(PROPERTY_STRING *prop, void *vfindstr)
{
struct find_str_st *findstr = vfindstr;
if (prop->idx == findstr->idx)
findstr->str = prop->s;
}
#endif
static const char *ossl_property_str(int name, OSSL_LIB_CTX *ctx,
OSSL_PROPERTY_IDX idx)
{
const char *r;
PROPERTY_STRING_DATA *propdata
= ossl_lib_ctx_get_data(ctx, OSSL_LIB_CTX_PROPERTY_STRING_INDEX,
&property_string_data_method);
if (propdata == NULL)
return NULL;
if (!CRYPTO_THREAD_read_lock(propdata->lock)) {
ERR_raise(ERR_LIB_CRYPTO, ERR_R_UNABLE_TO_GET_READ_LOCK);
return NULL;
}
#ifdef OPENSSL_SMALL_FOOTPRINT
{
struct find_str_st findstr;
findstr.str = NULL;
findstr.idx = idx;
lh_PROPERTY_STRING_doall_arg(name ? propdata->prop_names
: propdata->prop_values,
find_str_fn, &findstr);
r = findstr.str;
}
#else
r = sk_OPENSSL_CSTRING_value(name ? propdata->prop_namelist
: propdata->prop_valuelist, idx - 1);
#endif
CRYPTO_THREAD_unlock(propdata->lock);
return r;
}
OSSL_PROPERTY_IDX ossl_property_name(OSSL_LIB_CTX *ctx, const char *s,
int create)
{
return ossl_property_string(ctx, 1, create, s);
}
const char *ossl_property_name_str(OSSL_LIB_CTX *ctx, OSSL_PROPERTY_IDX idx)
{
return ossl_property_str(1, ctx, idx);
}
OSSL_PROPERTY_IDX ossl_property_value(OSSL_LIB_CTX *ctx, const char *s,
int create)
{
return ossl_property_string(ctx, 0, create, s);
}
const char *ossl_property_value_str(OSSL_LIB_CTX *ctx, OSSL_PROPERTY_IDX idx)
{
return ossl_property_str(0, ctx, idx);
}
|