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/Policies.h>
  23 #include <Security/oidsalg.h>
  24 #include <Security/tpclient.h>
  25
  26 using namespace KeychainCore;
  27 using namespace CssmClient;
  28
  29
  30 //
  31 // This preliminary implementation bypasses MDS and uses
  32 // a fixed set of policies known to exist in the one known TP.
  33 //
  34 struct TheOneTP : public TP {
  35         TheOneTP() : TP(gGuidAppleX509TP) { }
  36 };
  37
  38 static ModuleNexus<TheOneTP> theOneTP;
  39 static const CssmOid *theOidList[] = {
  40         static_cast<const CssmOid *>(&CSSMOID_APPLE_ISIGN),
  41         static_cast<const CssmOid *>(&CSSMOID_APPLE_X509_BASIC),
  42         static_cast<const CssmOid *>(&CSSMOID_APPLE_TP_SSL),
  43         static_cast<const CssmOid *>(&CSSMOID_APPLE_TP_SMIME),
  44         static_cast<const CssmOid *>(&CSSMOID_APPLE_TP_EAP),
  45         static_cast<const CssmOid *>(&CSSMOID_APPLE_TP_REVOCATION_CRL),
  46     NULL        // sentinel
  47 };
  48
  49
  50 //
  51 // Canonical Construction
  52 //
  53 PolicyCursor::PolicyCursor(const CSSM_OID* oid, const CSSM_DATA* value)
  54     : mOid(CssmAllocator::standard()), mOidGiven(false)
  55 {
  56     if (oid) {
  57         mOid = CssmOid::required(oid);
  58         mOidGiven = true;
  59     }
  60     mSearchPos = 0;
  61 }
  62
  63
  64 //
  65 // Destroy
  66 //
  67 PolicyCursor::~PolicyCursor() throw()
  68 {
  69 }
  70
  71
  72 //
  73 // Crank the iterator
  74 //
  75 bool PolicyCursor::next(SecPointer<Policy> &policy)
  76 {
  77     while (theOidList[mSearchPos]) {
  78         if (mOidGiven && mOid != *theOidList[mSearchPos]) {
  79             mSearchPos++;
  80             continue;   // no oid match
  81         }
  82         // ignoring mValue - not used by current TP
  83         policy = new Policy(theOneTP(), *theOidList[mSearchPos]);
  84         mSearchPos++;   // advance cursor
  85         return true;    // return next match
  86     }
  87     return false;       // end of table, no more matches
  88 }