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 "e_os.h" /* strcasecmp */
11 #include "internal/namemap.h"
12 #include <openssl/lhash.h>
13 #include "crypto/lhash.h" /* openssl_lh_strcasehash */
24 DEFINE_LHASH_OF(NAMENUM_ENTRY);
31 struct ossl_namemap_st {
33 unsigned int stored:1; /* If 1, it's stored in a library context */
36 LHASH_OF(NAMENUM_ENTRY) *namenum; /* Name->number mapping */
37 int max_number; /* Current max number */
42 static unsigned long namenum_hash(const NAMENUM_ENTRY *n)
44 return openssl_lh_strcasehash(n->name);
47 static int namenum_cmp(const NAMENUM_ENTRY *a, const NAMENUM_ENTRY *b)
49 return strcasecmp(a->name, b->name);
52 static void namenum_free(NAMENUM_ENTRY *n)
55 OPENSSL_free(n->name);
59 /* OPENSSL_CTX_METHOD functions for a namemap stored in a library context */
61 static void *stored_namemap_new(OPENSSL_CTX *libctx)
63 OSSL_NAMEMAP *namemap = ossl_namemap_new();
71 static void stored_namemap_free(void *vnamemap)
73 OSSL_NAMEMAP *namemap = vnamemap;
75 /* Pretend it isn't stored, or ossl_namemap_free() will do nothing */
77 ossl_namemap_free(namemap);
80 static const OPENSSL_CTX_METHOD stored_namemap_method = {
90 OSSL_NAMEMAP *ossl_namemap_stored(OPENSSL_CTX *libctx)
92 return openssl_ctx_get_data(libctx, OPENSSL_CTX_NAMEMAP_INDEX,
93 &stored_namemap_method);
96 OSSL_NAMEMAP *ossl_namemap_new(void)
98 OSSL_NAMEMAP *namemap;
100 if ((namemap = OPENSSL_zalloc(sizeof(*namemap))) != NULL
101 && (namemap->lock = CRYPTO_THREAD_lock_new()) != NULL
102 && (namemap->namenum =
103 lh_NAMENUM_ENTRY_new(namenum_hash, namenum_cmp)) != NULL)
106 ossl_namemap_free(namemap);
110 void ossl_namemap_free(OSSL_NAMEMAP *namemap)
112 if (namemap == NULL || namemap->stored)
115 lh_NAMENUM_ENTRY_doall(namemap->namenum, namenum_free);
116 lh_NAMENUM_ENTRY_free(namemap->namenum);
118 CRYPTO_THREAD_lock_free(namemap->lock);
119 OPENSSL_free(namemap);
122 typedef struct doall_names_data_st {
124 void (*fn)(const char *name, void *data);
128 static void do_name(const NAMENUM_ENTRY *namenum, DOALL_NAMES_DATA *data)
130 if (namenum->number == data->number)
131 data->fn(namenum->name, data->data);
134 IMPLEMENT_LHASH_DOALL_ARG_CONST(NAMENUM_ENTRY, DOALL_NAMES_DATA);
136 void ossl_namemap_doall_names(const OSSL_NAMEMAP *namemap, int number,
137 void (*fn)(const char *name, void *data),
140 DOALL_NAMES_DATA cbdata;
142 cbdata.number = number;
145 CRYPTO_THREAD_read_lock(namemap->lock);
146 lh_NAMENUM_ENTRY_doall_DOALL_NAMES_DATA(namemap->namenum, do_name,
148 CRYPTO_THREAD_unlock(namemap->lock);
151 int ossl_namemap_name2num_n(const OSSL_NAMEMAP *namemap,
152 const char *name, size_t name_len)
154 NAMENUM_ENTRY *namenum_entry, namenum_tmpl;
159 namemap = ossl_namemap_stored(NULL);
165 if ((namenum_tmpl.name = OPENSSL_strndup(name, name_len)) == NULL)
167 namenum_tmpl.number = 0;
168 CRYPTO_THREAD_read_lock(namemap->lock);
170 lh_NAMENUM_ENTRY_retrieve(namemap->namenum, &namenum_tmpl);
171 if (namenum_entry != NULL)
172 number = namenum_entry->number;
173 CRYPTO_THREAD_unlock(namemap->lock);
174 OPENSSL_free(namenum_tmpl.name);
179 int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
184 return ossl_namemap_name2num_n(namemap, name, strlen(name));
187 struct num2name_data_st {
188 size_t idx; /* Countdown */
189 const char *name; /* Result */
192 static void do_num2name(const char *name, void *vdata)
194 struct num2name_data_st *data = vdata;
198 else if (data->name == NULL)
202 const char *ossl_namemap_num2name(const OSSL_NAMEMAP *namemap, int number,
205 struct num2name_data_st data;
209 ossl_namemap_doall_names(namemap, number, do_num2name, &data);
213 int ossl_namemap_add_n(OSSL_NAMEMAP *namemap, int number,
214 const char *name, size_t name_len)
216 NAMENUM_ENTRY *namenum = NULL;
221 namemap = ossl_namemap_stored(NULL);
224 if (name == NULL || name_len == 0 || namemap == NULL)
227 if ((tmp_number = ossl_namemap_name2num_n(namemap, name, name_len)) != 0)
228 return tmp_number; /* Pretend success */
230 CRYPTO_THREAD_write_lock(namemap->lock);
232 if ((namenum = OPENSSL_zalloc(sizeof(*namenum))) == NULL
233 || (namenum->name = OPENSSL_strndup(name, name_len)) == NULL)
236 namenum->number = tmp_number =
237 number != 0 ? number : ++namemap->max_number;
238 (void)lh_NAMENUM_ENTRY_insert(namemap->namenum, namenum);
240 if (lh_NAMENUM_ENTRY_error(namemap->namenum))
243 CRYPTO_THREAD_unlock(namemap->lock);
248 namenum_free(namenum);
250 CRYPTO_THREAD_unlock(namemap->lock);
254 int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name)
259 return ossl_namemap_add_n(namemap, number, name, strlen(name));