Security-55163.44.tar.gz

[apple/security.git] / libsecurity_codesigning / lib / detachedrep.h

diff --git a/libsecurity_codesigning/lib/detachedrep.h b/libsecurity_codesigning/lib/detachedrep.h
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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
+//
+#ifndef _H_DETACHEDREP
+#define _H_DETACHEDREP
+
+#include "diskrep.h"
+#include "sigblob.h"
+
+namespace Security {
+namespace CodeSigning {
+
+
+//
+// We use a DetachedRep to interpose (filter) the genuine DiskRep representing
+// the code on disk, *if* a detached signature was set on this object. In this
+// situation, mRep will point to a (2 element) chain of DiskReps.
+//
+// This is a neat way of dealing with the (unusual) detached-signature case
+// without disturbing things unduly. Consider DetachedDiskRep to be closely
+// married to SecStaticCode; it's unlikely to work right if you use it elsewhere.
+//
+// Note that there's no *writing* code here. Writing detached signatures is handled
+// specially in the signing code.
+//
+class DetachedRep : public FilterRep {
+public:
+       DetachedRep(CFDataRef sig, DiskRep *orig, const std::string &source); // SuperBlob of all architectures
+       DetachedRep(CFDataRef sig, CFDataRef gsig, DiskRep *orig, const std::string &source); // one architecture + globals
+       
+       CFDataRef component(CodeDirectory::SpecialSlot slot);
+       
+       const std::string &source() const { return mSource; }
+
+private:
+       CFRef<CFDataRef> mSig, mGSig;
+       const EmbeddedSignatureBlob *mArch;             // current architecture; points into mSignature
+       const EmbeddedSignatureBlob *mGlobal;   // shared elements; points into mSignature
+       std::string mSource;                                    // source description (readable)
+};
+
+
+} // end namespace CodeSigning
+} // end namespace Security
+
+#endif // !_H_DETACHEDREP