| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] |
| */ |
| /* ==================================================================== |
| * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| * |
| * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * openssl-core@openssl.org. |
| * |
| * 5. Products derived from this software may not be called "OpenSSL" |
| * nor may "OpenSSL" appear in their names without prior written |
| * permission of the OpenSSL Project. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This product includes cryptographic software written by Eric Young |
| * (eay@cryptsoft.com). This product includes software written by Tim |
| * Hudson (tjh@cryptsoft.com). */ |
| |
| #include <openssl/ex_data.h> |
| |
| #include <assert.h> |
| |
| #include <openssl/err.h> |
| #include <openssl/lhash.h> |
| #include <openssl/mem.h> |
| #include <openssl/stack.h> |
| #include <openssl/thread.h> |
| |
| #include "crypto_error.h" |
| #include "internal.h" |
| |
| typedef struct crypto_ex_data_func_st { |
| long argl; /* Arbitary long */ |
| void *argp; /* Arbitary void pointer */ |
| CRYPTO_EX_new *new_func; |
| CRYPTO_EX_free *free_func; |
| CRYPTO_EX_dup *dup_func; |
| } CRYPTO_EX_DATA_FUNCS; |
| |
| typedef struct st_ex_class_item { |
| STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth; |
| int class_value; |
| /* TODO(fork): isn't |meth_num| just the length of |meth|? */ |
| int meth_num; |
| } EX_CLASS_ITEM; |
| |
| static LHASH_OF(EX_CLASS_ITEM) *global_classes = NULL; |
| |
| static int global_next_class = 100; |
| |
| static int new_class(void) { |
| int ret; |
| CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); |
| ret = global_next_class++; |
| CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); |
| |
| return ret; |
| } |
| |
| /* class_hash is a hash function used by an LHASH of |EX_CLASS_ITEM| |
| * structures. */ |
| static uint32_t class_hash(const EX_CLASS_ITEM *a) { |
| return a->class_value; |
| } |
| |
| /* class_cmp is a comparision function for an LHASH of |EX_CLASS_ITEM| |
| * structures. */ |
| static int class_cmp(const EX_CLASS_ITEM *a, const EX_CLASS_ITEM *b) { |
| return a->class_value - b->class_value; |
| } |
| |
| /* data_funcs_free is a callback function from |sk_pop_free| that frees a |
| * |CRYPTO_EX_DATA_FUNCS|. */ |
| static void data_funcs_free(CRYPTO_EX_DATA_FUNCS *funcs) { |
| OPENSSL_free(funcs); |
| } |
| |
| /* class_free is a callback function from lh_doall to free the EX_CLASS_ITEM |
| * structures. */ |
| static void class_free(EX_CLASS_ITEM *item) { |
| sk_CRYPTO_EX_DATA_FUNCS_pop_free(item->meth, data_funcs_free); |
| } |
| |
| static LHASH_OF(EX_CLASS_ITEM) *get_classes(void) { |
| LHASH_OF(EX_CLASS_ITEM) *ret; |
| |
| CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); |
| ret = global_classes; |
| CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); |
| |
| if (ret != NULL) { |
| return ret; |
| } |
| |
| CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); |
| if (global_classes == NULL) { |
| global_classes = lh_EX_CLASS_ITEM_new(class_hash, class_cmp); |
| } |
| ret = global_classes; |
| CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); |
| |
| return ret; |
| } |
| |
| static void cleanup(void) { |
| LHASH_OF(EX_CLASS_ITEM) *classes = get_classes(); |
| |
| lh_EX_CLASS_ITEM_doall(classes, class_free); |
| lh_EX_CLASS_ITEM_free(classes); |
| |
| global_classes = NULL; |
| } |
| |
| static EX_CLASS_ITEM *get_class(int class_value) { |
| LHASH_OF(EX_CLASS_ITEM) *const classes = get_classes(); |
| EX_CLASS_ITEM template, *class_item; |
| int ok = 0; |
| |
| CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); |
| template.class_value = class_value; |
| class_item = lh_EX_CLASS_ITEM_retrieve(classes, &template); |
| if (class_item != NULL) { |
| ok = 1; |
| } else { |
| class_item = OPENSSL_malloc(sizeof(EX_CLASS_ITEM)); |
| if (class_item) { |
| class_item->class_value = class_value; |
| class_item->meth_num = 0; |
| class_item->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null(); |
| if (class_item->meth != NULL) { |
| EX_CLASS_ITEM *old_data; |
| ok = lh_EX_CLASS_ITEM_insert(classes, &old_data, class_item); |
| assert(old_data == NULL); |
| } |
| } |
| } |
| CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); |
| |
| if (!ok) { |
| if (class_item) { |
| if (class_item->meth) { |
| sk_CRYPTO_EX_DATA_FUNCS_free(class_item->meth); |
| } |
| OPENSSL_free(class_item); |
| class_item = NULL; |
| } |
| |
| OPENSSL_PUT_ERROR(CRYPTO, get_class, ERR_R_MALLOC_FAILURE); |
| } |
| |
| return class_item; |
| } |
| |
| static int get_new_index(int class_value, long argl, void *argp, |
| CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, |
| CRYPTO_EX_free *free_func) { |
| EX_CLASS_ITEM *const item = get_class(class_value); |
| CRYPTO_EX_DATA_FUNCS *funcs; |
| int ret = -1; |
| |
| if (!item) { |
| return -1; |
| } |
| |
| funcs = OPENSSL_malloc(sizeof(CRYPTO_EX_DATA_FUNCS)); |
| if (funcs == NULL) { |
| OPENSSL_PUT_ERROR(CRYPTO, get_new_index, ERR_R_MALLOC_FAILURE); |
| return -1; |
| } |
| |
| funcs->argl = argl; |
| funcs->argp = argp; |
| funcs->new_func = new_func; |
| funcs->dup_func = dup_func; |
| funcs->free_func = free_func; |
| |
| CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); |
| /* TODO(fork): this loop appears to only ever run once. */ |
| while (sk_CRYPTO_EX_DATA_FUNCS_num(item->meth) <= item->meth_num) { |
| if (!sk_CRYPTO_EX_DATA_FUNCS_push(item->meth, NULL)) { |
| OPENSSL_PUT_ERROR(CRYPTO, get_new_index, ERR_R_MALLOC_FAILURE); |
| OPENSSL_free(funcs); |
| goto err; |
| } |
| } |
| |
| ret = item->meth_num++; |
| (void)sk_CRYPTO_EX_DATA_FUNCS_set(item->meth, ret, funcs); |
| |
| err: |
| CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); |
| return ret; |
| } |
| |
| /* get_func_pointers takes a copy of the CRYPTO_EX_DATA_FUNCS pointers, if any, |
| * for the given class. If there are some pointers, it sets |*out| to point to |
| * a fresh stack of them. Otherwise it sets |*out| to NULL. It returns one on |
| * success or zero on error. */ |
| static int get_func_pointers(STACK_OF(CRYPTO_EX_DATA_FUNCS) **out, |
| int class_value) { |
| EX_CLASS_ITEM *const item = get_class(class_value); |
| size_t n; |
| |
| if (!item) { |
| return 0; |
| } |
| |
| *out = NULL; |
| |
| /* CRYPTO_EX_DATA_FUNCS structures are static once set, so we can take a |
| * shallow copy of the list under lock and then use the structures without |
| * the lock held. */ |
| CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); |
| n = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); |
| if (n > 0) { |
| *out = sk_CRYPTO_EX_DATA_FUNCS_dup(item->meth); |
| } |
| CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); |
| |
| if (n > 0 && *out == NULL) { |
| OPENSSL_PUT_ERROR(CRYPTO, get_func_pointers, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static int new_ex_data(int class_value, void *obj, CRYPTO_EX_DATA *ad) { |
| STACK_OF(CRYPTO_EX_DATA_FUNCS) *func_pointers; |
| size_t i; |
| |
| ad->sk = NULL; |
| |
| if (!get_func_pointers(&func_pointers, class_value)) { |
| return 0; |
| } |
| |
| for (i = 0; i < sk_CRYPTO_EX_DATA_FUNCS_num(func_pointers); i++) { |
| CRYPTO_EX_DATA_FUNCS *func_pointer = |
| sk_CRYPTO_EX_DATA_FUNCS_value(func_pointers, i); |
| if (func_pointer->new_func) { |
| func_pointer->new_func(obj, NULL, ad, i, func_pointer->argl, |
| func_pointer->argp); |
| } |
| } |
| |
| sk_CRYPTO_EX_DATA_FUNCS_free(func_pointers); |
| |
| return 1; |
| } |
| |
| static int dup_ex_data(int class_value, CRYPTO_EX_DATA *to, |
| const CRYPTO_EX_DATA *from) { |
| STACK_OF(CRYPTO_EX_DATA_FUNCS) *func_pointers; |
| size_t i; |
| |
| if (!from->sk) { |
| /* In this case, |from| is blank, which is also the initial state of |to|, |
| * so there's nothing to do. */ |
| return 1; |
| } |
| |
| if (!get_func_pointers(&func_pointers, class_value)) { |
| return 0; |
| } |
| |
| for (i = 0; i < sk_CRYPTO_EX_DATA_FUNCS_num(func_pointers); i++) { |
| CRYPTO_EX_DATA_FUNCS *func_pointer = |
| sk_CRYPTO_EX_DATA_FUNCS_value(func_pointers, i); |
| void *ptr = CRYPTO_get_ex_data(from, i); |
| if (func_pointer->dup_func) { |
| func_pointer->dup_func(to, from, &ptr, i, func_pointer->argl, |
| func_pointer->argp); |
| } |
| CRYPTO_set_ex_data(to, i, ptr); |
| } |
| |
| sk_CRYPTO_EX_DATA_FUNCS_free(func_pointers); |
| |
| return 1; |
| } |
| |
| static void free_ex_data(int class_value, void *obj, CRYPTO_EX_DATA *ad) { |
| STACK_OF(CRYPTO_EX_DATA_FUNCS) *func_pointers; |
| size_t i; |
| |
| if (!get_func_pointers(&func_pointers, class_value)) { |
| return; |
| } |
| |
| for (i = 0; i < sk_CRYPTO_EX_DATA_FUNCS_num(func_pointers); i++) { |
| CRYPTO_EX_DATA_FUNCS *func_pointer = |
| sk_CRYPTO_EX_DATA_FUNCS_value(func_pointers, i); |
| if (func_pointer->free_func) { |
| void *ptr = CRYPTO_get_ex_data(ad, i); |
| func_pointer->free_func(obj, ptr, ad, i, func_pointer->argl, |
| func_pointer->argp); |
| } |
| } |
| |
| sk_CRYPTO_EX_DATA_FUNCS_free(func_pointers); |
| |
| if (ad->sk) { |
| sk_void_free(ad->sk); |
| ad->sk = NULL; |
| } |
| } |
| |
| const CRYPTO_EX_DATA_IMPL ex_data_default_impl = { |
| new_class, cleanup, get_new_index, new_ex_data, dup_ex_data, free_ex_data}; |