Make COMP_CTX and COMP_METHOD opaque

[openssl.git] / include / openssl / comp.h

diff --git a/include/openssl/comp.h b/include/openssl/comp.h
index 6799b0f4721aaea25c2e444eed810e24a0ad80f4..c7d903fc249ee424410879024275b6d8d567b945 100644 (file)
--- a/include/openssl/comp.h
+++ b/include/openssl/comp.h
@@ -1,3 +1,57 @@
+/* ====================================================================
+ * Copyright (c) 1999-2015 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
+ *    openssl-core@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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
 
 #ifndef HEADER_COMP_H
 # define HEADER_COMP_H
@@ -8,41 +62,19 @@
 extern "C" {
 #endif
 
-typedef struct comp_ctx_st COMP_CTX;
-
-typedef struct comp_method_st {
-    int type;                   /* NID for compression library */
-    const char *name;           /* A text string to identify the library */
-    int (*init) (COMP_CTX *ctx);
-    void (*finish) (COMP_CTX *ctx);
-    int (*compress) (COMP_CTX *ctx,
-                     unsigned char *out, unsigned int olen,
-                     unsigned char *in, unsigned int ilen);
-    int (*expand) (COMP_CTX *ctx,
-                   unsigned char *out, unsigned int olen,
-                   unsigned char *in, unsigned int ilen);
-    /*
-     * The following two do NOTHING, but are kept for backward compatibility
-     */
-    long (*ctrl) (void);
-    long (*callback_ctrl) (void);
-} COMP_METHOD;
-
-struct comp_ctx_st {
-    COMP_METHOD *meth;
-    unsigned long compress_in;
-    unsigned long compress_out;
-    unsigned long expand_in;
-    unsigned long expand_out;
-    CRYPTO_EX_DATA ex_data;
-};
 
 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
+const COMP_METHOD *COMP_CTX_get_method(const COMP_CTX *ctx);
+int COMP_CTX_get_type(const COMP_CTX* comp);
+int COMP_get_type(const COMP_METHOD *meth);
+const char *COMP_get_name(const COMP_METHOD *meth);
 void COMP_CTX_free(COMP_CTX *ctx);
+
 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
                         unsigned char *in, int ilen);
 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
                       unsigned char *in, int ilen);
+
 COMP_METHOD *COMP_zlib(void);
 void COMP_zlib_cleanup(void);