Security/libsecurity_ssl/lib/sslNullCipher.c

   1 /*
   2  * Copyright (c) 2000-2001,2005-2008,2010-2012,2014 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /* THIS FILE CONTAINS KERNEL CODE */
  25
  26 #include "symCipher.h"
  27
  28 #include <string.h>
  29
  30 const SSLSymmetricCipherParams SSLCipherNullParams = {
  31     .keyAlg = SSL_CipherAlgorithmNull,
  32     .ivSize = 0,
  33     .blockSize = 0,
  34     .keySize = 0,
  35     .cipherType = streamCipherType,
  36 };
  37
  38 static int NullInit(
  39     const SSLSymmetricCipherParams *cipher,
  40     int encrypting,
  41         uint8_t *key,
  42         uint8_t *iv,
  43         SymCipherContext *cipherCtx)
  44 {
  45         return 0;
  46 }
  47
  48 static int NullCrypt(
  49         const uint8_t *src,
  50         uint8_t *dest,
  51     size_t len,
  52         SymCipherContext cipherCt)
  53 {
  54         if (src != dest)
  55         memcpy(dest, src, len);
  56     return 0;
  57 }
  58
  59 static int NullFinish(
  60         SymCipherContext cipherCtx)
  61 {
  62         return 0;
  63 }
  64
  65 const SSLSymmetricCipher SSLCipherNull = {
  66     .params = &SSLCipherNullParams,
  67     .c.cipher = {
  68         .initialize = NullInit,
  69         .encrypt = NullCrypt,
  70         .decrypt = NullCrypt
  71     },
  72     .finish = NullFinish
  73 };