libsecurity_ssl/lib/sslNullCipher.c

   1 /*
   2  * Copyright (c) 2000-2001,2005-2008,2010-2012 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 #include "sslContext.h"
  25
  26 #include <string.h>
  27
  28 static OSStatus NullInit(
  29         uint8_t *key,
  30         uint8_t *iv,
  31         CipherContext *cipherCtx,
  32         SSLContext *ctx);
  33 static OSStatus NullCrypt(
  34         const uint8_t *src,
  35         uint8_t *dest,
  36     size_t len,
  37         CipherContext *cipherCtx,
  38         SSLContext *ctx);
  39 static OSStatus NullFinish(
  40         CipherContext *cipherCtx,
  41         SSLContext *ctx);
  42
  43 extern const SSLSymmetricCipher SSLCipherNull;
  44
  45 const SSLSymmetricCipher SSLCipherNull = {
  46     0,          /* Key size in bytes (ignoring parity) */
  47     0,          /* Secret key size */
  48     0,          /* IV size */
  49     0,          /* Block size */
  50     -1,         /* CC cipher (unused by Null*) */
  51     NullInit,
  52     NullCrypt,
  53     NullCrypt,
  54     NullFinish
  55 };
  56
  57 static OSStatus NullInit(
  58         uint8_t *key,
  59         uint8_t *iv,
  60         CipherContext *cipherCtx,
  61         SSLContext *ctx)
  62 {
  63         return noErr;
  64 }
  65
  66 static OSStatus NullCrypt(
  67         const uint8_t *src,
  68         uint8_t *dest,
  69     size_t len,
  70         CipherContext *cipherCtx,
  71         SSLContext *ctx)
  72 {
  73         if (src != dest)
  74         memcpy(dest, src, len);
  75     return noErr;
  76 }
  77
  78 static OSStatus NullFinish(
  79         CipherContext *cipherCtx,
  80         SSLContext *ctx)
  81 {
  82         return noErr;
  83 }