Keychain/PolicyCursor.cpp

   1 /*
   2  * Copyright (c) 2002 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 // PolicyCursor.cpp
  20 //
  21 #include <Security/PolicyCursor.h>
  22 #include <Security/oidsalg.h>
  23 #include <Security/tpclient.h>
  24
  25 using namespace KeychainCore;
  26 using namespace CssmClient;
  27
  28
  29 //
  30 // This preliminary implementation bypasses MDS and uses
  31 // a fixed set of policies known to exist in the one known TP.
  32 //
  33 struct TheOneTP : public TP {
  34         TheOneTP() : TP(gGuidAppleX509TP) { }
  35 };
  36
  37 static ModuleNexus<TheOneTP> theOneTP;
  38 static const CssmOid *theOidList[] = {
  39         static_cast<const CssmOid *>(&CSSMOID_APPLE_ISIGN),
  40         static_cast<const CssmOid *>(&CSSMOID_APPLE_X509_BASIC),
  41         static_cast<const CssmOid *>(&CSSMOID_APPLE_TP_SSL),
  42     NULL        // sentinel
  43 };
  44
  45
  46 //
  47 // Canonical Construction
  48 //
  49 PolicyCursor::PolicyCursor(const CSSM_OID* oid, const CSSM_DATA* value)
  50     : mOid(CssmAllocator::standard()), mOidGiven(false)
  51 {
  52     if (oid) {
  53         mOid = CssmOid::required(oid);
  54         mOidGiven = true;
  55     }
  56     mSearchPos = 0;
  57 }
  58
  59
  60 //
  61 // Destroy
  62 //
  63 PolicyCursor::~PolicyCursor()
  64 {
  65 }
  66
  67
  68 //
  69 // Crank the iterator
  70 //
  71 bool PolicyCursor::next(RefPointer<Policy> &policy)
  72 {
  73     while (theOidList[mSearchPos]) {
  74         if (mOidGiven && mOid != *theOidList[mSearchPos]) {
  75             mSearchPos++;
  76             continue;   // no oid match
  77         }
  78         // ignoring mValue - not used by current TP
  79         policy = new Policy(theOneTP(), *theOidList[mSearchPos]);
  80         mSearchPos++;   // advance cursor
  81         return true;    // return next match
  82     }
  83     return false;       // end of table, no more matches
  84 }