[331] | 1 | /*
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| 2 | * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <stdlib.h>
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| 12 | #include <string.h>
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| 13 | #include <openssl/objects.h>
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| 14 | #include <openssl/comp.h>
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| 15 | #include "comp_lcl.h"
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| 16 |
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| 17 | COMP_CTX *COMP_CTX_new(COMP_METHOD *meth)
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| 18 | {
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| 19 | COMP_CTX *ret;
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| 20 |
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| 21 | if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
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| 22 | return (NULL);
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| 23 | ret->meth = meth;
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| 24 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
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| 25 | OPENSSL_free(ret);
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| 26 | ret = NULL;
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| 27 | }
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| 28 | return (ret);
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| 29 | }
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| 30 |
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| 31 | const COMP_METHOD *COMP_CTX_get_method(const COMP_CTX *ctx)
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| 32 | {
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| 33 | return ctx->meth;
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| 34 | }
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| 35 |
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| 36 | int COMP_get_type(const COMP_METHOD *meth)
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| 37 | {
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| 38 | return meth->type;
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| 39 | }
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| 40 |
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| 41 | const char *COMP_get_name(const COMP_METHOD *meth)
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| 42 | {
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| 43 | return meth->name;
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| 44 | }
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| 45 |
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| 46 | void COMP_CTX_free(COMP_CTX *ctx)
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| 47 | {
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| 48 | if (ctx == NULL)
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| 49 | return;
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| 50 |
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| 51 | if (ctx->meth->finish != NULL)
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| 52 | ctx->meth->finish(ctx);
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| 53 |
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| 54 | OPENSSL_free(ctx);
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| 55 | }
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| 56 |
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| 57 | int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
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| 58 | unsigned char *in, int ilen)
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| 59 | {
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| 60 | int ret;
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| 61 | if (ctx->meth->compress == NULL) {
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| 62 | return (-1);
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| 63 | }
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| 64 | ret = ctx->meth->compress(ctx, out, olen, in, ilen);
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| 65 | if (ret > 0) {
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| 66 | ctx->compress_in += ilen;
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| 67 | ctx->compress_out += ret;
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| 68 | }
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| 69 | return (ret);
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| 70 | }
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| 71 |
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| 72 | int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
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| 73 | unsigned char *in, int ilen)
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| 74 | {
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| 75 | int ret;
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| 76 |
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| 77 | if (ctx->meth->expand == NULL) {
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| 78 | return (-1);
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| 79 | }
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| 80 | ret = ctx->meth->expand(ctx, out, olen, in, ilen);
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| 81 | if (ret > 0) {
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| 82 | ctx->expand_in += ilen;
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| 83 | ctx->expand_out += ret;
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| 84 | }
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| 85 | return (ret);
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| 86 | }
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| 87 |
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| 88 | int COMP_CTX_get_type(const COMP_CTX* comp)
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| 89 | {
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| 90 | return comp->meth ? comp->meth->type : NID_undef;
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| 91 | }
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