1  /*
 2   * Copyright (c) 2000-2001,2005-2007,2010-2012 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  /*
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   */
48  int
49  CloneHashState(
50  	const HashReference *ref, 
51  	const tls_buffer *state, 
52  	tls_buffer *newState)
53  {   
54  	int      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   */
63  int
64  ReadyHash(const HashReference *ref, tls_buffer *state)
65  {   
66  	int      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   */
76  int CloseHash(const HashReference *ref, tls_buffer *state)
77  {
78  	int 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  }