2 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include "internal/namemap.h"
11 #include <openssl/lhash.h>
22 DEFINE_LHASH_OF(NAMENUM_ENTRY);
29 struct ossl_namemap_st {
31 unsigned int stored:1; /* If 1, it's stored in a library context */
34 LHASH_OF(NAMENUM_ENTRY) *namenum; /* Name->number mapping */
35 int max_number; /* Current max number */
40 static unsigned long namenum_hash(const NAMENUM_ENTRY *n)
42 return OPENSSL_LH_strhash(n->name);
45 static int namenum_cmp(const NAMENUM_ENTRY *a, const NAMENUM_ENTRY *b)
47 return strcmp(a->name, b->name);
50 static void namenum_free(NAMENUM_ENTRY *n)
53 OPENSSL_free(n->name);
57 /* OPENSSL_CTX_METHOD functions for a namemap stored in a library context */
59 static void *stored_namemap_new(OPENSSL_CTX *libctx)
61 OSSL_NAMEMAP *namemap = ossl_namemap_new();
69 static void stored_namemap_free(void *vnamemap)
71 OSSL_NAMEMAP *namemap = vnamemap;
73 /* Pretend it isn't stored, or ossl_namemap_free() will do nothing */
75 ossl_namemap_free(namemap);
78 static const OPENSSL_CTX_METHOD stored_namemap_method = {
88 OSSL_NAMEMAP *ossl_namemap_stored(OPENSSL_CTX *libctx)
90 return openssl_ctx_get_data(libctx, OPENSSL_CTX_NAMEMAP_INDEX,
91 &stored_namemap_method);
94 OSSL_NAMEMAP *ossl_namemap_new(void)
96 OSSL_NAMEMAP *namemap;
98 if ((namemap = OPENSSL_zalloc(sizeof(*namemap))) != NULL
99 && (namemap->lock = CRYPTO_THREAD_lock_new()) != NULL
100 && (namemap->namenum =
101 lh_NAMENUM_ENTRY_new(namenum_hash, namenum_cmp)) != NULL)
104 ossl_namemap_free(namemap);
108 void ossl_namemap_free(OSSL_NAMEMAP *namemap)
110 if (namemap == NULL || namemap->stored)
113 lh_NAMENUM_ENTRY_doall(namemap->namenum, namenum_free);
114 lh_NAMENUM_ENTRY_free(namemap->namenum);
116 CRYPTO_THREAD_lock_free(namemap->lock);
117 OPENSSL_free(namemap);
120 typedef struct doall_names_data_st {
122 void (*fn)(const char *name, void *data);
126 static void do_name(const NAMENUM_ENTRY *namenum, DOALL_NAMES_DATA *data)
128 if (namenum->number == data->number)
129 data->fn(namenum->name, data->data);
132 IMPLEMENT_LHASH_DOALL_ARG_CONST(NAMENUM_ENTRY, DOALL_NAMES_DATA);
134 void ossl_namemap_doall_names(const OSSL_NAMEMAP *namemap, int number,
135 void (*fn)(const char *name, void *data),
138 DOALL_NAMES_DATA cbdata;
140 cbdata.number = number;
143 CRYPTO_THREAD_read_lock(namemap->lock);
144 lh_NAMENUM_ENTRY_doall_DOALL_NAMES_DATA(namemap->namenum, do_name,
146 CRYPTO_THREAD_unlock(namemap->lock);
149 int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
151 NAMENUM_ENTRY *namenum_entry, namenum_tmpl;
156 namemap = ossl_namemap_stored(NULL);
162 namenum_tmpl.name = (char *)name;
163 namenum_tmpl.number = 0;
164 CRYPTO_THREAD_read_lock(namemap->lock);
166 lh_NAMENUM_ENTRY_retrieve(namemap->namenum, &namenum_tmpl);
167 if (namenum_entry != NULL)
168 number = namenum_entry->number;
169 CRYPTO_THREAD_unlock(namemap->lock);
174 int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name)
176 NAMENUM_ENTRY *namenum = NULL;
181 namemap = ossl_namemap_stored(NULL);
184 if (name == NULL || namemap == NULL)
187 if ((tmp_number = ossl_namemap_name2num(namemap, name)) != 0)
188 return tmp_number; /* Pretend success */
190 CRYPTO_THREAD_write_lock(namemap->lock);
192 if ((namenum = OPENSSL_zalloc(sizeof(*namenum))) == NULL
193 || (namenum->name = OPENSSL_strdup(name)) == NULL)
196 namenum->number = tmp_number =
197 number != 0 ? number : ++namemap->max_number;
198 (void)lh_NAMENUM_ENTRY_insert(namemap->namenum, namenum);
200 if (lh_NAMENUM_ENTRY_error(namemap->namenum))
203 CRYPTO_THREAD_unlock(namemap->lock);
208 namenum_free(namenum);
210 CRYPTO_THREAD_unlock(namemap->lock);