/* 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_grpc/ex_data.h> #include <assert.h> #include <string.h> #include <openssl_grpc/crypto.h> #include <openssl_grpc/err.h> #include <openssl_grpc/mem.h> #include <openssl_grpc/stack.h> #include <openssl_grpc/thread.h> #include "internal.h" DEFINE_STACK_OF(CRYPTO_EX_DATA_FUNCS) struct crypto_ex_data_func_st { long argl; // Arbitary long void *argp; // Arbitary void pointer CRYPTO_EX_free *free_func; }; int CRYPTO_get_ex_new_index(CRYPTO_EX_DATA_CLASS *ex_data_class, int *out_index, long argl, void *argp, CRYPTO_EX_free *free_func) { CRYPTO_EX_DATA_FUNCS *funcs; int ret = 0; funcs = OPENSSL_malloc(sizeof(CRYPTO_EX_DATA_FUNCS)); if (funcs == NULL) { OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE); return 0; } funcs->argl = argl; funcs->argp = argp; funcs->free_func = free_func; CRYPTO_STATIC_MUTEX_lock_write(&ex_data_class->lock); if (ex_data_class->meth == NULL) { ex_data_class->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null(); } if (ex_data_class->meth == NULL || !sk_CRYPTO_EX_DATA_FUNCS_push(ex_data_class->meth, funcs)) { OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE); OPENSSL_free(funcs); goto err; } *out_index = sk_CRYPTO_EX_DATA_FUNCS_num(ex_data_class->meth) - 1 + ex_data_class->num_reserved; ret = 1; err: CRYPTO_STATIC_MUTEX_unlock_write(&ex_data_class->lock); return ret; } int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int index, void *val) { int n, i; if (ad->sk == NULL) { ad->sk = sk_void_new_null(); if (ad->sk == NULL) { OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE); return 0; } } n = sk_void_num(ad->sk); // Add NULL values until the stack is long enough. for (i = n; i <= index; i++) { if (!sk_void_push(ad->sk, NULL)) { OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE); return 0; } } sk_void_set(ad->sk, index, val); return 1; } void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx) { if (ad->sk == NULL || idx < 0 || (size_t)idx >= sk_void_num(ad->sk)) { return NULL; } return sk_void_value(ad->sk, idx); } // 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, CRYPTO_EX_DATA_CLASS *ex_data_class) { size_t n; *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_STATIC_MUTEX_lock_read(&ex_data_class->lock); n = sk_CRYPTO_EX_DATA_FUNCS_num(ex_data_class->meth); if (n > 0) { *out = sk_CRYPTO_EX_DATA_FUNCS_dup(ex_data_class->meth); } CRYPTO_STATIC_MUTEX_unlock_read(&ex_data_class->lock); if (n > 0 && *out == NULL) { OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE); return 0; } return 1; } void CRYPTO_new_ex_data(CRYPTO_EX_DATA *ad) { ad->sk = NULL; } void CRYPTO_free_ex_data(CRYPTO_EX_DATA_CLASS *ex_data_class, void *obj, CRYPTO_EX_DATA *ad) { if (ad->sk == NULL) { // Nothing to do. return; } STACK_OF(CRYPTO_EX_DATA_FUNCS) *func_pointers; if (!get_func_pointers(&func_pointers, ex_data_class)) { // TODO(davidben): This leaks memory on malloc error. return; } for (size_t 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 + ex_data_class->num_reserved); func_pointer->free_func(obj, ptr, ad, i + ex_data_class->num_reserved, func_pointer->argl, func_pointer->argp); } } sk_CRYPTO_EX_DATA_FUNCS_free(func_pointers); sk_void_free(ad->sk); ad->sk = NULL; } void CRYPTO_cleanup_all_ex_data(void) {}