Security/libsecurity_cdsa_client/lib/macclient.cpp

   1 /*
   2  * Copyright (c) 2000-2001,2011-2012,2014 Apple 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 //
  20 // macclient - client interface to CSSM sign/verify mac contexts
  21 //
  22 #include <security_cdsa_client/macclient.h>
  23
  24 using namespace CssmClient;
  25
  26
  27 //
  28 // Common features of signing and verify mac contexts
  29 //
  30 void MacContext::activate()
  31 {
  32     {
  33         StLock<Mutex> _(mActivateMutex);
  34         if (!mActive)
  35         {
  36             check(CSSM_CSP_CreateMacContext(attachment()->handle(), mAlgorithm,
  37                   mKey, &mHandle));
  38             mActive = true;
  39         }
  40     }
  41
  42     if (cred())
  43         cred(cred());           // install explicitly
  44 }
  45
  46
  47 //
  48 // Signing
  49 //
  50 void GenerateMac::sign(const CssmData *data, uint32 count, CssmData &mac)
  51 {
  52         unstaged();
  53         check(CSSM_GenerateMac(handle(), data, count, &mac));
  54 }
  55
  56 void GenerateMac::init()
  57 {
  58         check(CSSM_GenerateMacInit(handle()));
  59         mStaged = true;
  60 }
  61
  62 void GenerateMac::sign(const CssmData *data, uint32 count)
  63 {
  64         staged();
  65         check(CSSM_GenerateMacUpdate(handle(), data, count));
  66 }
  67
  68 void GenerateMac::operator () (CssmData &mac)
  69 {
  70         staged();
  71         check(CSSM_GenerateMacFinal(handle(), &mac));
  72         mStaged = false;
  73 }
  74
  75
  76 //
  77 // Verifying
  78 //
  79 void VerifyMac::verify(const CssmData *data, uint32 count, const CssmData &mac)
  80 {
  81         unstaged();
  82         check(CSSM_VerifyMac(handle(), data, count, &mac));
  83 }
  84
  85 void VerifyMac::init()
  86 {
  87         check(CSSM_VerifyMacInit(handle()));
  88         mStaged = true;
  89 }
  90
  91 void VerifyMac::verify(const CssmData *data, uint32 count)
  92 {
  93         staged();
  94         check(CSSM_VerifyMacUpdate(handle(), data, count));
  95 }
  96
  97 void VerifyMac::operator () (const CssmData &mac)
  98 {
  99         staged();
 100         check(CSSM_VerifyMacFinal(handle(), &mac));
 101         mStaged = false;
 102 }