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1 /*
2 * Copyright (c) 2010-2011,2014 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
25 #include "SecTransform.h"
26 #include "SecCustomTransform.h"
27 #include "SecExternalSourceTransform.h"
28 #include <dispatch/dispatch.h>
29
30 CFStringRef external_source_name = CFSTR("com.apple.security.external_source");
31
32 static SecTransformInstanceBlock SecExternalSourceTransformCreateBlock(CFStringRef name, SecTransformRef newTransform, SecTransformImplementationRef ref)
33 {
34 return Block_copy(^{
35 SecTransformCustomSetAttribute(ref, kSecTransformInputAttributeName, kSecTransformMetaAttributeRequired, kCFBooleanFalse);
36
37 SecTransformAttributeRef out = SecTranformCustomGetAttribute(ref, kSecTransformOutputAttributeName, kSecTransformMetaAttributeRef);
38
39 SecTransformSetAttributeAction(ref, kSecTransformActionAttributeNotification, kSecTransformInputAttributeName, ^(SecTransformAttributeRef attribute, CFTypeRef value) {
40 SecTransformCustomSetAttribute(ref, out, kSecTransformMetaAttributeValue, value);
41 return (CFTypeRef)NULL;
42 });
43
44 return (CFErrorRef)NULL;
45 });
46 }
47
48 SecTransformRef SecExternalSourceTransformCreate(CFErrorRef* error)
49 {
50 static dispatch_once_t once;
51 dispatch_once(&once, ^{
52 SecTransformRegister(external_source_name, SecExternalSourceTransformCreateBlock, error);
53 });
54
55 return SecTransformCreate(external_source_name, error);
56 }