1/*
2 *  Copyright (c) 2004 Apple Computer, 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    @header SecCmsDigestContext.h
26    @copyright 2004 Apple Computer, Inc. All Rights Reserved.
27
28    @availability 10.4 and later
29    @abstract Interfaces of the CMS implementation.
30    @discussion The functions here implement functions calculating digests.
31 */
32
33#ifndef _SECURITY_SECCMSDIGESTCONTEXT_H_
34#define _SECURITY_SECCMSDIGESTCONTEXT_H_  1
35
36#include <Security/SecCmsBase.h>
37
38
39#if defined(__cplusplus)
40extern "C" {
41#endif
42
43
44/*!
45    @function
46    @abstract Start digest calculation using all the digest algorithms in "digestalgs" in parallel.
47 */
48extern SecCmsDigestContextRef
49SecCmsDigestContextStartMultiple(SECAlgorithmID **digestalgs);
50
51/*!
52    @function
53    @abstract Feed more data into the digest machine.
54 */
55extern void
56SecCmsDigestContextUpdate(SecCmsDigestContextRef cmsdigcx, const unsigned char *data, size_t len);
57
58/*!
59    @function
60    @abstract Cancel digesting operation.
61    @discussion Cancel a DigestContext created with @link SecCmsDigestContextStartMultiple SecCmsDigestContextStartMultiple function@/link.
62 */
63extern void
64SecCmsDigestContextCancel(SecCmsDigestContextRef cmsdigcx);
65
66/*!
67    @function
68    @abstract Finish the digests and put them into an array of CSSM_DATAs (allocated on arena)
69 */
70extern OSStatus
71SecCmsDigestContextFinishMultiple(SecCmsDigestContextRef cmsdigcx, SecArenaPoolRef arena,
72			    CSSM_DATA_PTR **digestsp);
73
74#if defined(__cplusplus)
75}
76#endif
77
78#endif /* _SECURITY_SECCMSDIGESTCONTEXT_H_ */
79