libsecurity_ssl/lib/tls_digest.h

   1 /*
   2  * Copyright (c) 1999-2001,2005-2007,2010-2011 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  * tls_digest.h - HashReference declarations
  26  */
  27
  28 #ifndef _TLS_DIGEST_H_
  29 #define _TLS_DIGEST_H_  1
  30
  31 #include "sslTypes.h"
  32
  33 #ifdef __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 /*
  38  * These numbers show up all over the place...might as well hard code 'em once.
  39  */
  40 #define SSL_MD5_DIGEST_LEN      16
  41 #define SSL_SHA1_DIGEST_LEN     20
  42 #define SSL_SHA256_DIGEST_LEN   32
  43 #define SSL_SHA384_DIGEST_LEN   48
  44 #define SSL_MAX_DIGEST_LEN      48 /* >= SSL_MD5_DIGEST_LEN + SSL_SHA1_DIGEST_LEN */
  45
  46 #define MAX_MAC_PADDING         48      /* MD5 MAC padding size = 48 bytes */
  47
  48 extern const uint8_t SSLMACPad1[], SSLMACPad2[];
  49
  50 typedef int (*HashInit)(SSLBuffer *digestCtx);
  51 typedef int (*HashUpdate)(SSLBuffer *digestCtx, const SSLBuffer *data);
  52 /* HashFinal also does HashClose */
  53 typedef int (*HashFinal)(SSLBuffer *digestCtx, SSLBuffer *digest);
  54 typedef int (*HashClose)(SSLBuffer *digestCtx);
  55 typedef int (*HashClone)(const SSLBuffer *src, SSLBuffer *dest);
  56
  57 typedef struct
  58 {
  59     uint32_t    digestSize;
  60     uint32_t    macPadSize;
  61     uint32_t    contextSize;
  62     HashInit    init;
  63     HashUpdate  update;
  64     HashFinal   final;
  65     HashClose   close;
  66     HashClone   clone;
  67 } HashReference;
  68
  69 extern const HashReference SSLHashNull;
  70 extern const HashReference SSLHashMD5;
  71 extern const HashReference SSLHashSHA1;
  72 extern const HashReference SSLHashSHA256;
  73 extern const HashReference SSLHashSHA384;
  74
  75
  76 #ifdef __cplusplus
  77 }
  78 #endif
  79
  80 #endif  /* _TLS_DIGEST_H_ */