1/*
2 * Copyright (c) 2000-2001,2005-2007,2010-2014 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 * sslDigests.c - Interface between SSL and SHA, MD5 digest implementations
26 */
27
28#include "sslMemory.h"
29#include "sslDigests.h"
30#include <Security/SecBase.h>
31
32#define DIGEST_PRINT		0
33#if		DIGEST_PRINT
34#define dgprintf(s)	printf s
35#else
36#define dgprintf(s)
37#endif
38
39
40/*
41 * Public general hash functions
42 */
43
44/*
45 * A convenience wrapper for HashReference.clone, which has the added benefit of
46 * allocating the state buffer for the caller.
47 */
48OSStatus
49CloneHashState(
50	const HashReference *ref,
51	const SSLBuffer *state,
52	SSLBuffer *newState)
53{
54	OSStatus      err;
55    if ((err = SSLAllocBuffer(newState, ref->contextSize)))
56        return err;
57	return ref->clone(state, newState);
58}
59
60/*
61 * Wrapper for HashReference.init.
62 */
63OSStatus
64ReadyHash(const HashReference *ref, SSLBuffer *state)
65{
66	OSStatus      err;
67    if ((err = SSLAllocBuffer(state, ref->contextSize)))
68        return err;
69    return ref->init(state);
70}
71
72/*
73 * Wrapper for HashReference.close. Tolerates NULL state and frees it if it's
74 * there.
75 */
76OSStatus CloseHash(const HashReference *ref, SSLBuffer *state)
77{
78	OSStatus serr;
79
80	if(state->data == NULL) {
81		return errSecSuccess;
82	}
83	serr = ref->close(state);
84	if(serr) {
85		return serr;
86	}
87	return SSLFreeBuffer(state);
88}
89