1  /*
 2   * Copyright (c) 2017 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  
25  #ifndef SecPaddingConfigurations_h
26  #define SecPaddingConfigurations_h
27  
28  #include <CoreFoundation/CoreFoundation.h>
29  
30  typedef CF_ENUM(uint8_t, SecPaddingType) {
31  	SecPaddingTypeMMCS CF_ENUM_AVAILABLE(10_13, 11_0) = 0,
32  } CF_ENUM_AVAILABLE(10_13, 11_0);
33  
34  /*!
35   @function
36   @abstract   Compute the padding size given the size of the content
37   @param      type Type of content to be protected
38   @param      size size before padding
39   @param      error Output parameter to a CFErrorRef
40   @result     number of bytes to add to the message. Only returns a negative value on SecPaddingType mismatch with a CFError assigned
41   */
42  int64_t SecPaddingCompute(SecPaddingType type, uint32_t size, CFErrorRef *error)
43  __OSX_AVAILABLE(10.13) __IOS_AVAILABLE(11.0) __TVOS_AVAILABLE(11.0) __WATCHOS_AVAILABLE(4.0);
44  
45  #endif