1/*
2 * Copyright 1998-2018 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 <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include <openssl/objects.h>
14#include <openssl/comp.h>
15#include <openssl/err.h>
16#include "comp_local.h"
17
18COMP_CTX *COMP_CTX_new(COMP_METHOD *meth)
19{
20 COMP_CTX *ret;
21
22 if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
23 COMPerr(COMP_F_COMP_CTX_NEW, ERR_R_MALLOC_FAILURE);
24 return NULL;
25 }
26 ret->meth = meth;
27 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
28 OPENSSL_free(ret);
29 ret = NULL;
30 }
31 return ret;
32}
33
34const COMP_METHOD *COMP_CTX_get_method(const COMP_CTX *ctx)
35{
36 return ctx->meth;
37}
38
39int COMP_get_type(const COMP_METHOD *meth)
40{
41 return meth->type;
42}
43
44const char *COMP_get_name(const COMP_METHOD *meth)
45{
46 return meth->name;
47}
48
49void COMP_CTX_free(COMP_CTX *ctx)
50{
51 if (ctx == NULL)
52 return;
53 if (ctx->meth->finish != NULL)
54 ctx->meth->finish(ctx);
55
56 OPENSSL_free(ctx);
57}
58
59int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
60 unsigned char *in, int ilen)
61{
62 int ret;
63 if (ctx->meth->compress == NULL) {
64 return -1;
65 }
66 ret = ctx->meth->compress(ctx, out, olen, in, ilen);
67 if (ret > 0) {
68 ctx->compress_in += ilen;
69 ctx->compress_out += ret;
70 }
71 return ret;
72}
73
74int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
75 unsigned char *in, int ilen)
76{
77 int ret;
78
79 if (ctx->meth->expand == NULL) {
80 return -1;
81 }
82 ret = ctx->meth->expand(ctx, out, olen, in, ilen);
83 if (ret > 0) {
84 ctx->expand_in += ilen;
85 ctx->expand_out += ret;
86 }
87 return ret;
88}
89
90int COMP_CTX_get_type(const COMP_CTX* comp)
91{
92 return comp->meth ? comp->meth->type : NID_undef;
93}
94