Security-57336.1.9.tar.gz

[apple/security.git] / OSX / libsecurity_apple_x509_cl / lib / DecodedItem.cpp

diff --git a/OSX/libsecurity_apple_x509_cl/lib/DecodedItem.cpp b/OSX/libsecurity_apple_x509_cl/lib/DecodedItem.cpp
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+/*
+ * Copyright (c) 2002,2011,2014 Apple Inc. All Rights Reserved.
+ * 
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please obtain
+ * a copy of the License at http://www.apple.com/publicsource and read it before
+ * using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
+ * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
+ * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
+ * specific language governing rights and limitations under the License.
+ */
+
+
+/*
+ * DecodedItem.cpp - class representing the common portions of NSS-style
+ * certs and CRLs, with extensions parsed and decoded (still in NSS
+ * format).
+ */
+
+#include "DecodedItem.h"
+#include "cldebugging.h"
+#include "AppleX509CLSession.h"
+#include "CSPAttacher.h"
+#include "CLFieldsCommon.h"
+#include "clNssUtils.h"
+#include <Security/cssmapple.h>
+
+
+DecodedItem::DecodedItem(
+       AppleX509CLSession      &session)
+       :       mState(IS_Empty),
+               mAlloc(session),
+               mSession(session),
+               mDecodedExtensions(mCoder, session)
+{
+}
+
+DecodedItem::~DecodedItem()
+{
+       /* nothing for now */
+}
+
+/* 
+ * Search for DecodedExten by AsnOid or "any unknown extension".
+ * Called from getField*() and inferKeyUsage. 
+ * Returns NULL if specified extension not found.
+ */
+const DecodedExten *DecodedItem::findDecodedExt(
+       const CSSM_OID          &extnId,                // for known extensions
+       bool                            unknown,                // otherwise            
+       uint32                          index, 
+       uint32                          &numFields) const
+{
+       unsigned dex;
+       const DecodedExten *rtnExt = NULL;
+       unsigned found = 0;
+       
+       for(dex=0; dex<mDecodedExtensions.numExtensions(); dex++) {
+               const DecodedExten *decodedExt = mDecodedExtensions.getExtension(dex);
+               /*
+                * known extensions: OID match AND successful decode (In case
+                *    we encountered a known extension which we couldn't
+                *    decode and fell back to giving the app an unparsed
+                *    BER blob). 
+                * unknown extensions: just know that we didn't decode it
+                */
+               if( ( !unknown && !decodedExt->berEncoded() &&
+                     (clCompareCssmData(&decodedExt->extnId(), &extnId))
+                       ) || 
+                   (unknown && decodedExt->berEncoded())
+                  ) {
+                       
+                       if(found++ == index) {
+                               /* the one we want */
+                               rtnExt = decodedExt;
+                       }
+                       if((rtnExt != NULL) && (index != 0)) {
+                               /* only determine numFields on search for first one */
+                               break;
+                       }
+               }
+       }
+       if(rtnExt != NULL) {
+               /* sucessful return  */
+               if(index == 0) {
+                       numFields = found;
+               }
+               return rtnExt;
+       }
+       else {
+               return NULL;
+       }
+}
+