1 /* 2 * Copyright 2024 The OpenSSL Project Authors. All Rights Reserved. 3 * 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 8 */ 9 10 #include <openssl/crypto.h> 11 #include <openssl/comp.h> 12 #include <openssl/obj_mac.h> 13 14 #include "internal/cryptlib.h" 15 #include "internal/comp.h" 16 17 #define SSL_COMP_NULL_IDX 0 18 #define SSL_COMP_ZLIB_IDX 1 19 #define SSL_COMP_NUM_IDX 2 20 21 #ifndef OPENSSL_NO_COMP sk_comp_cmp(const SSL_COMP * const * a,const SSL_COMP * const * b)22static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b) 23 { 24 return ((*a)->id - (*b)->id); 25 } 26 #endif 27 STACK_OF(SSL_COMP)28STACK_OF(SSL_COMP) *ossl_load_builtin_compressions(void) 29 { 30 STACK_OF(SSL_COMP) *comp_methods = NULL; 31 #ifndef OPENSSL_NO_COMP 32 SSL_COMP *comp = NULL; 33 COMP_METHOD *method = COMP_zlib(); 34 35 comp_methods = sk_SSL_COMP_new(sk_comp_cmp); 36 37 if (COMP_get_type(method) != NID_undef && comp_methods != NULL) { 38 comp = OPENSSL_malloc(sizeof(*comp)); 39 if (comp != NULL) { 40 comp->method = method; 41 comp->id = SSL_COMP_ZLIB_IDX; 42 comp->name = COMP_get_name(method); 43 if (!sk_SSL_COMP_push(comp_methods, comp)) 44 OPENSSL_free(comp); 45 } 46 } 47 #endif 48 return comp_methods; 49 } 50 cmeth_free(SSL_COMP * cm)51static void cmeth_free(SSL_COMP *cm) 52 { 53 OPENSSL_free(cm); 54 } 55 ossl_free_compression_methods_int(STACK_OF (SSL_COMP)* methods)56void ossl_free_compression_methods_int(STACK_OF(SSL_COMP) *methods) 57 { 58 sk_SSL_COMP_pop_free(methods, cmeth_free); 59 } 60
