SecureTransport/nullciph.c

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 /*  *********************************************************************
  20     File: nullciph.c
  21
  22     SSLRef 3.0 Final -- 11/19/96
  23
  24     Copyright (c)1996 by Netscape Communications Corp.
  25
  26     By retrieving this software you are bound by the licensing terms
  27     disclosed in the file "LICENSE.txt". Please read it, and if you don't
  28     accept the terms, delete this software.
  29
  30     SSLRef 3.0 was developed by Netscape Communications Corp. of Mountain
  31     View, California <http://home.netscape.com/> and Consensus Development
  32     Corporation of Berkeley, California <http://www.consensus.com/>.
  33
  34     *********************************************************************
  35
  36     File: nullciph.c   A dummy implementation of the null cipher
  37
  38     The null cipher is used for SSL_NULL_WITH_NULL_NULL,
  39     SSL_RSA_WITH_NULL_MD5, and SSL_RSA_WITH_NULL_SHA ciphers.
  40
  41     ****************************************************************** */
  42
  43 #ifndef _SSLCTX_H_
  44 #include "sslctx.h"
  45 #endif
  46
  47 #include <string.h>
  48
  49 static SSLErr NullInit(
  50         uint8 *key,
  51         uint8* iv,
  52         CipherContext *cipherCtx,
  53         SSLContext *ctx);
  54 static SSLErr NullCrypt(
  55         SSLBuffer src,
  56         SSLBuffer dest,
  57         CipherContext *cipherCtx,
  58         SSLContext *ctx);
  59 static SSLErr NullFinish(
  60         CipherContext *cipherCtx,
  61         SSLContext *ctx);
  62
  63 const SSLSymmetricCipher SSLCipherNull = {
  64     0,          /* Key size in bytes (ignoring parity) */
  65     0,          /* Secret key size */
  66     0,          /* IV size */
  67     0,          /* Block size */
  68     #ifdef      _APPLE_CDSA_
  69     CSSM_ALGID_NONE,
  70     CSSM_ALGID_NONE,
  71     CSSM_ALGMODE_NONE,
  72         CSSM_PADDING_NONE,
  73     #endif      /* _APPLE_CDSA */
  74     NullInit,
  75     NullCrypt,
  76     NullCrypt,
  77     NullFinish
  78 };
  79
  80 static SSLErr NullInit(
  81         uint8 *key,
  82         uint8* iv,
  83         CipherContext *cipherCtx,
  84         SSLContext *ctx)
  85 {
  86         return SSLNoErr;
  87 }
  88
  89 static SSLErr NullCrypt(
  90         SSLBuffer src,
  91         SSLBuffer dest,
  92         CipherContext *cipherCtx,
  93         SSLContext *ctx)
  94 {
  95         if (src.data != dest.data)
  96         memcpy(dest.data, src.data, src.length);
  97     return SSLNoErr;
  98 }
  99
 100 static SSLErr NullFinish(
 101         CipherContext *cipherCtx,
 102         SSLContext *ctx)
 103 {
 104         return SSLNoErr;
 105 }