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[apple/security.git] / libsecurity_codesigning / lib / detachedrep.cpp
diff --git a/libsecurity_codesigning/lib/detachedrep.cpp b/libsecurity_codesigning/lib/detachedrep.cpp
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-/*
- * Copyright (c) 2006-2008 Apple Inc. All Rights Reserved.
- * 
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The 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.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-//
-// detachedrep - prefix diskrep representing a detached signature stored in a file
-//
-#include "detachedrep.h"
-
-
-namespace Security {
-namespace CodeSigning {
-
-
-//
-// We construct a DetachedRep from the data blob of the detached signature
-// and a reference of the original DiskRep we chain to.
-// We accept an EmbeddedSignatureBlob (for a non-architected signature)
-// or a DetachedSignatureBlob (for architected signatures) that is a SuperBlob
-// of EmbeddedSignatureBlobs.
-//
-DetachedRep::DetachedRep(CFDataRef sig, DiskRep *orig, const std::string &source)
-       : FilterRep(orig), mSig(sig), mFull(true), mSource(source)
-{
-       const BlobCore *sigBlob = reinterpret_cast<const BlobCore *>(CFDataGetBytePtr(sig));
-       if (sigBlob->is<EmbeddedSignatureBlob>()) {             // architecture-less
-               if ((mArch = EmbeddedSignatureBlob::specific(sigBlob))) {
-                       mGlobal = NULL;
-                       CODESIGN_DISKREP_CREATE_DETACHED(this, orig, (char*)source.c_str(), NULL);
-                       return;
-               }
-       } else if (sigBlob->is<DetachedSignatureBlob>())        // architecture collection
-               if (const DetachedSignatureBlob *dsblob = DetachedSignatureBlob::specific(sigBlob))
-                       if (Universal *fat = orig->mainExecutableImage())
-                               if (const BlobCore *blob = dsblob->find(fat->bestNativeArch().cpuType()))
-                                       if ((mArch = EmbeddedSignatureBlob::specific(blob)))
-                                               if ((mGlobal = EmbeddedSignatureBlob::specific(dsblob->find(0)))) {
-                                                       CODESIGN_DISKREP_CREATE_DETACHED(this, orig, (char*)source.c_str(), (void*)mGlobal);
-                                                       return;
-                                               }
-       MacOSError::throwMe(errSecCSSignatureInvalid);
-}
-
-
-//
-// Here's a version to construct a DetachedRep if we already have the right architecture
-// and (optional) associated global blob. Just take them.
-//
-DetachedRep::DetachedRep(CFDataRef sig, CFDataRef gsig, DiskRep *orig, const std::string &source)
-       : FilterRep(orig), mSig(sig), mGSig(gsig), mFull(false), mSource(source)
-{
-       const BlobCore *sigBlob = reinterpret_cast<const BlobCore *>(CFDataGetBytePtr(sig));
-       mArch = EmbeddedSignatureBlob::specific(sigBlob);
-       if (!mArch)
-               MacOSError::throwMe(errSecCSSignatureInvalid);
-       if (gsig) {
-               const BlobCore *gsigBlob = reinterpret_cast<const BlobCore *>(CFDataGetBytePtr(gsig));
-               mGlobal = EmbeddedSignatureBlob::specific(gsigBlob);
-               if (!mGlobal)
-                       MacOSError::throwMe(errSecCSSignatureInvalid);
-       } else
-               mGlobal = NULL;
-       CODESIGN_DISKREP_CREATE_DETACHED(this, orig, (char*)source.c_str(), (void*)mGlobal);
-}
-
-
-//
-// We look up components by first checking for a per-architecture item,
-// then for a global item in the detached signature, and finally falling
-// back on the original DiskRep (for static components).
-//
-CFDataRef DetachedRep::component(CodeDirectory::SpecialSlot slot)
-{
-       if (CFDataRef result = mArch->component(slot))
-               return result;
-       if (mGlobal)
-               if (CFDataRef result = mGlobal->component(slot))
-                       return result;
-       return this->base()->component(slot);
-}
-
-
-} // end namespace CodeSigning
-} // end namespace Security