2 * Copyright 1998-2018 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
14 #include <openssl/err.h>
15 #include <openssl/lhash.h>
16 #include <openssl/objects.h>
17 #include <openssl/safestack.h>
18 #include <openssl/e_os2.h>
19 #include "internal/thread_once.h"
20 #include "crypto/lhash.h"
21 #include "obj_local.h"
25 * We define this wrapper for two reasons. Firstly, later versions of
26 * DEC C add linkage information to certain functions, which makes it
27 * tricky to use them as values to regular function pointers.
28 * Secondly, in the EDK2 build environment, the strcasecmp function is
29 * actually an external function with the Microsoft ABI, so we can't
30 * transparently assign function pointers to it.
32 #if defined(OPENSSL_SYS_VMS_DECC) || defined(OPENSSL_SYS_UEFI)
33 static int obj_strcasecmp(const char *a, const char *b)
35 return strcasecmp(a, b);
38 #define obj_strcasecmp strcasecmp
42 * I use the ex_data stuff to manage the identifiers for the obj_name_types
43 * that applications may define. I only really use the free function field.
45 static LHASH_OF(OBJ_NAME) *names_lh = NULL;
46 static int names_type_num = OBJ_NAME_TYPE_NUM;
47 static CRYPTO_RWLOCK *obj_lock = NULL;
49 struct name_funcs_st {
50 unsigned long (*hash_func) (const char *name);
51 int (*cmp_func) (const char *a, const char *b);
52 void (*free_func) (const char *, int, const char *);
55 static STACK_OF(NAME_FUNCS) *name_funcs_stack;
58 * The LHASH callbacks now use the raw "void *" prototypes and do
59 * per-variable casting in the functions. This prevents function pointer
60 * casting without the need for macro-generated wrapper functions.
63 static unsigned long obj_name_hash(const OBJ_NAME *a);
64 static int obj_name_cmp(const OBJ_NAME *a, const OBJ_NAME *b);
66 static CRYPTO_ONCE init = CRYPTO_ONCE_STATIC_INIT;
67 DEFINE_RUN_ONCE_STATIC(o_names_init)
69 names_lh = lh_OBJ_NAME_new(obj_name_hash, obj_name_cmp);
70 obj_lock = CRYPTO_THREAD_lock_new();
71 return names_lh != NULL && obj_lock != NULL;
74 int OBJ_NAME_init(void)
76 return RUN_ONCE(&init, o_names_init);
79 int OBJ_NAME_new_index(unsigned long (*hash_func) (const char *),
80 int (*cmp_func) (const char *, const char *),
81 void (*free_func) (const char *, int, const char *))
84 NAME_FUNCS *name_funcs;
89 CRYPTO_THREAD_write_lock(obj_lock);
91 if (name_funcs_stack == NULL)
92 name_funcs_stack = sk_NAME_FUNCS_new_null();
93 if (name_funcs_stack == NULL) {
99 for (i = sk_NAME_FUNCS_num(name_funcs_stack); i < names_type_num; i++) {
100 name_funcs = OPENSSL_zalloc(sizeof(*name_funcs));
101 if (name_funcs == NULL) {
102 OBJerr(OBJ_F_OBJ_NAME_NEW_INDEX, ERR_R_MALLOC_FAILURE);
106 name_funcs->hash_func = openssl_lh_strcasehash;
107 name_funcs->cmp_func = obj_strcasecmp;
108 push = sk_NAME_FUNCS_push(name_funcs_stack, name_funcs);
111 OBJerr(OBJ_F_OBJ_NAME_NEW_INDEX, ERR_R_MALLOC_FAILURE);
112 OPENSSL_free(name_funcs);
117 name_funcs = sk_NAME_FUNCS_value(name_funcs_stack, ret);
118 if (hash_func != NULL)
119 name_funcs->hash_func = hash_func;
120 if (cmp_func != NULL)
121 name_funcs->cmp_func = cmp_func;
122 if (free_func != NULL)
123 name_funcs->free_func = free_func;
126 CRYPTO_THREAD_unlock(obj_lock);
130 static int obj_name_cmp(const OBJ_NAME *a, const OBJ_NAME *b)
134 ret = a->type - b->type;
136 if ((name_funcs_stack != NULL)
137 && (sk_NAME_FUNCS_num(name_funcs_stack) > a->type)) {
138 ret = sk_NAME_FUNCS_value(name_funcs_stack,
139 a->type)->cmp_func(a->name, b->name);
141 ret = strcasecmp(a->name, b->name);
146 static unsigned long obj_name_hash(const OBJ_NAME *a)
150 if ((name_funcs_stack != NULL)
151 && (sk_NAME_FUNCS_num(name_funcs_stack) > a->type)) {
153 sk_NAME_FUNCS_value(name_funcs_stack,
154 a->type)->hash_func(a->name);
156 ret = openssl_lh_strcasehash(a->name);
162 const char *OBJ_NAME_get(const char *name, int type)
166 const char *value = NULL;
170 if (!OBJ_NAME_init())
172 CRYPTO_THREAD_read_lock(obj_lock);
174 alias = type & OBJ_NAME_ALIAS;
175 type &= ~OBJ_NAME_ALIAS;
181 ret = lh_OBJ_NAME_retrieve(names_lh, &on);
184 if ((ret->alias) && !alias) {
194 CRYPTO_THREAD_unlock(obj_lock);
198 int OBJ_NAME_add(const char *name, int type, const char *data)
203 if (!OBJ_NAME_init())
206 alias = type & OBJ_NAME_ALIAS;
207 type &= ~OBJ_NAME_ALIAS;
209 onp = OPENSSL_malloc(sizeof(*onp));
220 CRYPTO_THREAD_write_lock(obj_lock);
222 ret = lh_OBJ_NAME_insert(names_lh, onp);
225 if ((name_funcs_stack != NULL)
226 && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type)) {
228 * XXX: I'm not sure I understand why the free function should
229 * get three arguments... -- Richard Levitte
231 sk_NAME_FUNCS_value(name_funcs_stack,
232 ret->type)->free_func(ret->name, ret->type,
237 if (lh_OBJ_NAME_error(names_lh)) {
247 CRYPTO_THREAD_unlock(obj_lock);
251 int OBJ_NAME_remove(const char *name, int type)
256 if (!OBJ_NAME_init())
259 CRYPTO_THREAD_write_lock(obj_lock);
261 type &= ~OBJ_NAME_ALIAS;
264 ret = lh_OBJ_NAME_delete(names_lh, &on);
267 if ((name_funcs_stack != NULL)
268 && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type)) {
270 * XXX: I'm not sure I understand why the free function should
271 * get three arguments... -- Richard Levitte
273 sk_NAME_FUNCS_value(name_funcs_stack,
274 ret->type)->free_func(ret->name, ret->type,
281 CRYPTO_THREAD_unlock(obj_lock);
287 void (*fn) (const OBJ_NAME *, void *arg);
291 static void do_all_fn(const OBJ_NAME *name, OBJ_DOALL *d)
293 if (name->type == d->type)
297 IMPLEMENT_LHASH_DOALL_ARG_CONST(OBJ_NAME, OBJ_DOALL);
299 void OBJ_NAME_do_all(int type, void (*fn) (const OBJ_NAME *, void *arg),
308 lh_OBJ_NAME_doall_OBJ_DOALL(names_lh, do_all_fn, &d);
311 struct doall_sorted {
314 const OBJ_NAME **names;
317 static void do_all_sorted_fn(const OBJ_NAME *name, void *d_)
319 struct doall_sorted *d = d_;
321 if (name->type != d->type)
324 d->names[d->n++] = name;
327 static int do_all_sorted_cmp(const void *n1_, const void *n2_)
329 const OBJ_NAME *const *n1 = n1_;
330 const OBJ_NAME *const *n2 = n2_;
332 return strcmp((*n1)->name, (*n2)->name);
335 void OBJ_NAME_do_all_sorted(int type,
336 void (*fn) (const OBJ_NAME *, void *arg),
339 struct doall_sorted d;
344 OPENSSL_malloc(sizeof(*d.names) * lh_OBJ_NAME_num_items(names_lh));
345 /* Really should return an error if !d.names...but its a void function! */
346 if (d.names != NULL) {
348 OBJ_NAME_do_all(type, do_all_sorted_fn, &d);
350 qsort((void *)d.names, d.n, sizeof(*d.names), do_all_sorted_cmp);
352 for (n = 0; n < d.n; ++n)
355 OPENSSL_free((void *)d.names);
359 static int free_type;
361 static void names_lh_free_doall(OBJ_NAME *onp)
366 if (free_type < 0 || free_type == onp->type)
367 OBJ_NAME_remove(onp->name, onp->type);
370 static void name_funcs_free(NAME_FUNCS *ptr)
375 void OBJ_NAME_cleanup(int type)
377 unsigned long down_load;
379 if (names_lh == NULL)
383 down_load = lh_OBJ_NAME_get_down_load(names_lh);
384 lh_OBJ_NAME_set_down_load(names_lh, 0);
386 lh_OBJ_NAME_doall(names_lh, names_lh_free_doall);
388 lh_OBJ_NAME_free(names_lh);
389 sk_NAME_FUNCS_pop_free(name_funcs_stack, name_funcs_free);
390 CRYPTO_THREAD_lock_free(obj_lock);
392 name_funcs_stack = NULL;
395 lh_OBJ_NAME_set_down_load(names_lh, down_load);