libsecurity_ssl/lib/sslDigests.c

   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 OSStatus
  49 CloneHashState(
  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  */
  63 OSStatus
  64 ReadyHash(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  */
  76 OSStatus 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 }