1 /*
2 * Copyright 1998-2020 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
COMP_CTX_new(COMP_METHOD * meth)18 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth)
19 {
20 COMP_CTX *ret;
21
22 if (meth == NULL)
23 return NULL;
24
25 if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
26 return NULL;
27 ret->meth = meth;
28 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
29 OPENSSL_free(ret);
30 ret = NULL;
31 }
32 return ret;
33 }
34
COMP_CTX_get_method(const COMP_CTX * ctx)35 const COMP_METHOD *COMP_CTX_get_method(const COMP_CTX *ctx)
36 {
37 return ctx->meth;
38 }
39
COMP_get_type(const COMP_METHOD * meth)40 int COMP_get_type(const COMP_METHOD *meth)
41 {
42 if (meth == NULL)
43 return NID_undef;
44 return meth->type;
45 }
46
COMP_get_name(const COMP_METHOD * meth)47 const char *COMP_get_name(const COMP_METHOD *meth)
48 {
49 if (meth == NULL)
50 return NULL;
51 return meth->name;
52 }
53
COMP_CTX_free(COMP_CTX * ctx)54 void COMP_CTX_free(COMP_CTX *ctx)
55 {
56 if (ctx == NULL)
57 return;
58 if (ctx->meth->finish != NULL)
59 ctx->meth->finish(ctx);
60
61 OPENSSL_free(ctx);
62 }
63
COMP_compress_block(COMP_CTX * ctx,unsigned char * out,int olen,unsigned char * in,int ilen)64 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
65 unsigned char *in, int ilen)
66 {
67 int ret;
68 if (ctx->meth->compress == NULL) {
69 return -1;
70 }
71 ret = ctx->meth->compress(ctx, out, olen, in, ilen);
72 if (ret > 0) {
73 ctx->compress_in += ilen;
74 ctx->compress_out += ret;
75 }
76 return ret;
77 }
78
COMP_expand_block(COMP_CTX * ctx,unsigned char * out,int olen,unsigned char * in,int ilen)79 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
80 unsigned char *in, int ilen)
81 {
82 int ret;
83
84 if (ctx->meth->expand == NULL) {
85 return -1;
86 }
87 ret = ctx->meth->expand(ctx, out, olen, in, ilen);
88 if (ret > 0) {
89 ctx->expand_in += ilen;
90 ctx->expand_out += ret;
91 }
92 return ret;
93 }
94
COMP_CTX_get_type(const COMP_CTX * comp)95 int COMP_CTX_get_type(const COMP_CTX* comp)
96 {
97 return comp->meth ? comp->meth->type : NID_undef;
98 }
99
