/* $OpenBSD: comp_lib.c,v 1.11 2022/12/24 07:12:09 tb Exp $ */ /* * --------------------------------------------------------------------------- * Patches to this file were contributed by * Ben Laurie and Ulf Moeller . * --------------------------------------------------------------------------- * Copyright (c) 1999 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * --------------------------------------------------------------------------- * Parts of this file are derived from SSLeay code * which is covered by the following Copyright and license: * --------------------------------------------------------------------------- * Copyright (c) 1998 Eric Young * All rights reserved. * * This package is an SSL implementation written * by Eric Young . * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson . * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given * attribution as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young " * The word 'cryptographic' can be left out if the rouines from the * library being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) * from the apps directory (application code) you must include an * acknowledgement: "This product includes software written * by Tim Hudson " * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version * or derivative of this code cannot be changed. i.e. this code cannot * simply be copied and put under another distribution licence * [including the GNU Public Licence.] */ #include #include #include #include #include #include "comp_local.h" COMP_CTX * COMP_CTX_new(COMP_METHOD *meth) { COMP_CTX *ret; if ((ret = calloc(1, sizeof(COMP_CTX))) == NULL) { return (NULL); } ret->meth = meth; if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { free(ret); ret = NULL; } return (ret); } void COMP_CTX_free(COMP_CTX *ctx) { if (ctx == NULL) return; if (ctx->meth->finish != NULL) ctx->meth->finish(ctx); free(ctx); } int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen, unsigned char *in, int ilen) { int ret; if (ctx->meth->compress == NULL) { return (-1); } ret = ctx->meth->compress(ctx, out, olen, in, ilen); if (ret > 0) { ctx->compress_in += ilen; ctx->compress_out += ret; } return (ret); } int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen, unsigned char *in, int ilen) { int ret; if (ctx->meth->expand == NULL) { return (-1); } ret = ctx->meth->expand(ctx, out, olen, in, ilen); if (ret > 0) { ctx->expand_in += ilen; ctx->expand_out += ret; } return (ret); }