obscure.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:4k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- #include <stdlib.h>
- #include "obspriv.h"
- #include "newproto.h"
- /*
- ** Create a new Obscuring object
- */
- SSMObscureObject *
- SSMObscure_Create(SSMObscureBool IsServer)
- {
- SSMObscureObject * obj;
- void * priv;
- obj = (SSMObscureObject *) cmt_alloc(sizeof *obj);
- if (!obj)
- return obj;
- /* This needs to be a little more elegant */
- priv = SSMObscure_InitPrivate(obj, IsServer);
- if (!priv) {
- cmt_free(obj);
- return NULL;
- }
- obj->privData = priv;
- return obj;
- }
- /* Prepare initial buffer with initial message to send to other side to
- ** establish cryptographic * synchronization.
- **
- ** If buf is NULL, function returns the size of the buffer that
- ** the caller needs to allocate for sending the initial message.
- **
- ** If buf is non-null, function returns the number of bytes of data filled
- ** into buf, the amount that the caller should then send to the other side.
- **
- */
- int
- SSMObscure_SendInit( SSMObscureObject * obj, void * buf)
- {
- int rv;
- rv = obj->sendInit(obj->privData, buf);
- return rv;
- }
- /*
- ** Obscure "len" bytes in "buf" before sending it.
- */
- int
- SSMObscure_Send( SSMObscureObject * obj,
- void * buf,
- unsigned int len)
- {
- int rv;
- rv = obj->send(obj->privData, buf, len);
- return rv;
- }
- /*
- ** UnObscure "len" bytes in "buf" after receiving it.
- ** This function may absorb some or all of the received bytes, leaving
- ** fewer bytes (possibly none) in the buffer for the application to use
- ** than were in the buffer when the function was called.
- ** Function returns the number of bytes of unobscured data remaining in
- ** buf. Zero means all data was used internally and no data remains
- ** for application use. Negative number means error occurred.
- */
- int
- SSMObscure_Recv( SSMObscureObject * obj,
- void * buf,
- unsigned int len)
- {
- int rv;
- rv = obj->recv(obj->privData, buf, len);
- return rv;
- }
- /* like _Recv, but returns a flag telling when all initialization info has
- ** been received.
- */
- int
- SSMObscure_RecvInit( SSMObscureObject * obj,
- void * buf,
- unsigned int len,
- SSMObscureBool * done)
- {
- int rv;
- rv = obj->recvInit(obj->privData, buf, len, done);
- return rv;
- }
- /*
- ** Destroy the Obscure Object
- */
- int
- SSMObscure_Destroy(SSMObscureObject * obj)
- {
- int rv;
- rv = obj->destroy(obj->privData);
- cmt_free(obj);
- return rv;
- }