crypto/comp/comp_lib.c

   1 /*
   2  * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 "comp_lcl.h"
  16
  17 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth)
  18 {
  19     COMP_CTX *ret;
  20
  21     if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
  22         return (NULL);
  23     ret->meth = meth;
  24     if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
  25         OPENSSL_free(ret);
  26         ret = NULL;
  27     }
  28     return (ret);
  29 }
  30
  31 const COMP_METHOD *COMP_CTX_get_method(const COMP_CTX *ctx)
  32 {
  33     return ctx->meth;
  34 }
  35
  36 int COMP_get_type(const COMP_METHOD *meth)
  37 {
  38     return meth->type;
  39 }
  40
  41 const char *COMP_get_name(const COMP_METHOD *meth)
  42 {
  43     return meth->name;
  44 }
  45
  46 void COMP_CTX_free(COMP_CTX *ctx)
  47 {
  48     if (ctx == NULL)
  49         return;
  50
  51     if (ctx->meth->finish != NULL)
  52         ctx->meth->finish(ctx);
  53
  54     OPENSSL_free(ctx);
  55 }
  56
  57 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
  58                         unsigned char *in, int ilen)
  59 {
  60     int ret;
  61     if (ctx->meth->compress == NULL) {
  62         return (-1);
  63     }
  64     ret = ctx->meth->compress(ctx, out, olen, in, ilen);
  65     if (ret > 0) {
  66         ctx->compress_in += ilen;
  67         ctx->compress_out += ret;
  68     }
  69     return (ret);
  70 }
  71
  72 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
  73                       unsigned char *in, int ilen)
  74 {
  75     int ret;
  76
  77     if (ctx->meth->expand == NULL) {
  78         return (-1);
  79     }
  80     ret = ctx->meth->expand(ctx, out, olen, in, ilen);
  81     if (ret > 0) {
  82         ctx->expand_in += ilen;
  83         ctx->expand_out += ret;
  84     }
  85     return (ret);
  86 }
  87
  88 int COMP_CTX_get_type(const COMP_CTX* comp)
  89 {
  90     return comp->meth ? comp->meth->type : NID_undef;
  91 }