AppleCSP/MiscCSPAlgs/MacContext.h

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18 /*
  19  * MacContext.h - AppleCSPContext for HMACSHA1
  20  */
  21
  22 #ifndef _MAC_CONTEXT_H_
  23 #define _MAC_CONTEXT_H_
  24
  25 #include <AppleCSP/AppleCSPContext.h>
  26 #include <PBKDF2/HMACSHA1.h>
  27
  28 #define HMAC_MIN_KEY_SIZE               20              /* in bytes */
  29 #define HMAC_MAX_KEY_SIZE               2048
  30
  31
  32 class MacContext : public AppleCSPContext  {
  33 public:
  34         MacContext(
  35                 AppleCSPSession &session) :
  36                         AppleCSPContext(session), mHmac(NULL) { }
  37         ~MacContext();
  38
  39         /* called out from CSPFullPluginSession....
  40          * both generate and verify: */
  41         void init(const Context &context, bool isSigning);
  42         void update(const CssmData &data);
  43
  44         /* generate only */
  45         void final(CssmData &out);
  46
  47         /* verify only */
  48         void final(const CssmData &in);
  49
  50         size_t outputSize(bool final, size_t inSize);
  51
  52 private:
  53         hmacContextRef  mHmac;
  54 };
  55
  56 #ifdef  CRYPTKIT_CSP_ENABLE
  57 #include <CryptKit/HmacSha1Legacy.h>
  58
  59 /* This version is bug-for-bug compatible with a legacy implementation */
  60
  61 class MacLegacyContext : public AppleCSPContext  {
  62 public:
  63         MacLegacyContext(
  64                 AppleCSPSession &session) :
  65                         AppleCSPContext(session), mHmac(NULL) { }
  66         ~MacLegacyContext();
  67
  68         /* called out from CSPFullPluginSession....
  69          * both generate and verify: */
  70         void init(const Context &context, bool isSigning);
  71         void update(const CssmData &data);
  72
  73         /* generate only */
  74         void final(CssmData &out);
  75
  76         /* verify only */
  77         void final(const CssmData &in);
  78
  79         size_t outputSize(bool final, size_t inSize);
  80
  81 private:
  82         hmacLegacyContextRef    mHmac;
  83 };
  84
  85 #endif  /* CRYPTKIT_CSP_ENABLE */
  86
  87 #endif  /* _MAC_CONTEXT_H_ */