First Commit

externals/libressl/crypto/comp/comp_lib.c

@@ -0,0 +1,184 @@
+/* $OpenBSD: comp_lib.c,v 1.11 2022/12/24 07:12:09 tb Exp $ */
+/*
+ * ---------------------------------------------------------------------------
+ * Patches to this file were contributed by
+ * Ben Laurie <ben@openssl.org> and Ulf Moeller <ulf@openssl.org>.
+ * ---------------------------------------------------------------------------
+ * 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 <eay@cryptsoft.com>
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young <eay@cryptsoft.com>.
+ * 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 <tjh@cryptsoft.com>.
+ *
+ * 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 <eay@cryptsoft.com>"
+ *    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 <tjh@cryptsoft.com>"
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <openssl/objects.h>
+#include <openssl/comp.h>
+
+#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);
+}