xref: /freebsd/crypto/openssl/crypto/comp_methods.c (revision e7be843b4a162e68651d3911f0357ed464915629) 
1*e7be843bSPierre Pronchery /*
2*e7be843bSPierre Pronchery  * Copyright 2024 The OpenSSL Project Authors. All Rights Reserved.
3*e7be843bSPierre Pronchery  *
4*e7be843bSPierre Pronchery  * Licensed under the Apache License 2.0 (the "License").  You may not use
5*e7be843bSPierre Pronchery  * this file except in compliance with the License.  You can obtain a copy
6*e7be843bSPierre Pronchery  * in the file LICENSE in the source distribution or at
7*e7be843bSPierre Pronchery  * https://www.openssl.org/source/license.html
8*e7be843bSPierre Pronchery  */
9*e7be843bSPierre Pronchery 
10*e7be843bSPierre Pronchery #include <openssl/crypto.h>
11*e7be843bSPierre Pronchery #include <openssl/comp.h>
12*e7be843bSPierre Pronchery #include <openssl/obj_mac.h>
13*e7be843bSPierre Pronchery 
14*e7be843bSPierre Pronchery #include "internal/cryptlib.h"
15*e7be843bSPierre Pronchery #include "internal/comp.h"
16*e7be843bSPierre Pronchery 
17*e7be843bSPierre Pronchery #define SSL_COMP_NULL_IDX       0
18*e7be843bSPierre Pronchery #define SSL_COMP_ZLIB_IDX       1
19*e7be843bSPierre Pronchery #define SSL_COMP_NUM_IDX        2
20*e7be843bSPierre Pronchery 
21*e7be843bSPierre Pronchery #ifndef OPENSSL_NO_COMP
sk_comp_cmp(const SSL_COMP * const * a,const SSL_COMP * const * b)22*e7be843bSPierre Pronchery static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
23*e7be843bSPierre Pronchery {
24*e7be843bSPierre Pronchery     return ((*a)->id - (*b)->id);
25*e7be843bSPierre Pronchery }
26*e7be843bSPierre Pronchery #endif
27*e7be843bSPierre Pronchery 
STACK_OF(SSL_COMP)28*e7be843bSPierre Pronchery STACK_OF(SSL_COMP) *ossl_load_builtin_compressions(void)
29*e7be843bSPierre Pronchery {
30*e7be843bSPierre Pronchery     STACK_OF(SSL_COMP) *comp_methods = NULL;
31*e7be843bSPierre Pronchery #ifndef OPENSSL_NO_COMP
32*e7be843bSPierre Pronchery     SSL_COMP *comp = NULL;
33*e7be843bSPierre Pronchery     COMP_METHOD *method = COMP_zlib();
34*e7be843bSPierre Pronchery 
35*e7be843bSPierre Pronchery     comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
36*e7be843bSPierre Pronchery 
37*e7be843bSPierre Pronchery     if (COMP_get_type(method) != NID_undef && comp_methods != NULL) {
38*e7be843bSPierre Pronchery         comp = OPENSSL_malloc(sizeof(*comp));
39*e7be843bSPierre Pronchery         if (comp != NULL) {
40*e7be843bSPierre Pronchery             comp->method = method;
41*e7be843bSPierre Pronchery             comp->id = SSL_COMP_ZLIB_IDX;
42*e7be843bSPierre Pronchery             comp->name = COMP_get_name(method);
43*e7be843bSPierre Pronchery             if (!sk_SSL_COMP_push(comp_methods, comp))
44*e7be843bSPierre Pronchery                 OPENSSL_free(comp);
45*e7be843bSPierre Pronchery         }
46*e7be843bSPierre Pronchery     }
47*e7be843bSPierre Pronchery #endif
48*e7be843bSPierre Pronchery     return comp_methods;
49*e7be843bSPierre Pronchery }
50*e7be843bSPierre Pronchery 
cmeth_free(SSL_COMP * cm)51*e7be843bSPierre Pronchery static void cmeth_free(SSL_COMP *cm)
52*e7be843bSPierre Pronchery {
53*e7be843bSPierre Pronchery     OPENSSL_free(cm);
54*e7be843bSPierre Pronchery }
55*e7be843bSPierre Pronchery 
ossl_free_compression_methods_int(STACK_OF (SSL_COMP)* methods)56*e7be843bSPierre Pronchery void ossl_free_compression_methods_int(STACK_OF(SSL_COMP) *methods)
57*e7be843bSPierre Pronchery {
58*e7be843bSPierre Pronchery     sk_SSL_COMP_pop_free(methods, cmeth_free);
59*e7be843bSPierre Pronchery }
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