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1 | /* |
2 | * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. | |
4 | * | |
5 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
6 | * this file except in compliance with the License. You can obtain a copy | |
7 | * in the file LICENSE in the source distribution or at | |
8 | * https://www.openssl.org/source/license.html | |
9 | */ | |
10 | ||
11 | #include <string.h> | |
12 | #include <openssl/err.h> | |
13 | #include <openssl/lhash.h> | |
14 | #include "internal/propertyerr.h" | |
15 | #include "internal/property.h" | |
16 | #include "property_lcl.h" | |
17 | ||
18 | /* | |
19 | * Implement a property definition cache. | |
20 | * These functions assume that they are called under a write lock. | |
21 | * No attempt is made to clean out the cache, except when it is shut down. | |
22 | */ | |
23 | ||
24 | typedef struct { | |
25 | const char *prop; | |
26 | OSSL_PROPERTY_LIST *defn; | |
27 | char body[1]; | |
28 | } PROPERTY_DEFN_ELEM; | |
29 | ||
30 | DEFINE_LHASH_OF(PROPERTY_DEFN_ELEM); | |
31 | ||
32 | static LHASH_OF(PROPERTY_DEFN_ELEM) *property_defns = NULL; | |
33 | ||
34 | static unsigned long property_defn_hash(const PROPERTY_DEFN_ELEM *a) | |
35 | { | |
36 | return OPENSSL_LH_strhash(a->prop); | |
37 | } | |
38 | ||
39 | static int property_defn_cmp(const PROPERTY_DEFN_ELEM *a, | |
40 | const PROPERTY_DEFN_ELEM *b) | |
41 | { | |
42 | return strcmp(a->prop, b->prop); | |
43 | } | |
44 | ||
45 | static void property_defn_free(PROPERTY_DEFN_ELEM *elem) | |
46 | { | |
47 | ossl_property_free(elem->defn); | |
48 | OPENSSL_free(elem); | |
49 | } | |
50 | ||
51 | int ossl_prop_defn_init(void) | |
52 | { | |
53 | property_defns = lh_PROPERTY_DEFN_ELEM_new(&property_defn_hash, | |
54 | &property_defn_cmp); | |
55 | return property_defns != NULL; | |
56 | } | |
57 | ||
58 | void ossl_prop_defn_cleanup(void) | |
59 | { | |
60 | if (property_defns != NULL) { | |
61 | lh_PROPERTY_DEFN_ELEM_doall(property_defns, &property_defn_free); | |
62 | lh_PROPERTY_DEFN_ELEM_free(property_defns); | |
63 | property_defns = NULL; | |
64 | } | |
65 | } | |
66 | ||
67 | OSSL_PROPERTY_LIST *ossl_prop_defn_get(const char *prop) | |
68 | { | |
69 | PROPERTY_DEFN_ELEM elem, *r; | |
70 | ||
71 | elem.prop = prop; | |
72 | r = lh_PROPERTY_DEFN_ELEM_retrieve(property_defns, &elem); | |
73 | return r != NULL ? r->defn : NULL; | |
74 | } | |
75 | ||
76 | int ossl_prop_defn_set(const char *prop, OSSL_PROPERTY_LIST *pl) | |
77 | { | |
78 | PROPERTY_DEFN_ELEM elem, *old, *p = NULL; | |
79 | size_t len; | |
80 | ||
81 | if (prop == NULL) | |
82 | return 1; | |
83 | ||
84 | if (pl == NULL) { | |
85 | elem.prop = prop; | |
86 | lh_PROPERTY_DEFN_ELEM_delete(property_defns, &elem); | |
87 | return 1; | |
88 | } | |
89 | len = strlen(prop); | |
90 | p = OPENSSL_malloc(sizeof(*p) + len); | |
91 | if (p != NULL) { | |
92 | p->prop = p->body; | |
93 | p->defn = pl; | |
94 | memcpy(p->body, prop, len + 1); | |
95 | old = lh_PROPERTY_DEFN_ELEM_insert(property_defns, p); | |
96 | if (old != NULL) { | |
97 | property_defn_free(old); | |
98 | return 1; | |
99 | } | |
100 | if (!lh_PROPERTY_DEFN_ELEM_error(property_defns)) | |
101 | return 1; | |
102 | } | |
103 | OPENSSL_free(p); | |
104 | return 0; | |
105 | } |