OSX/libsecurity_codesigning/lib/detachedrep.h

   1 /*
   2  * Copyright (c) 2006-2008,2011-2013 Apple Inc. All Rights Reserved.
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   8  * Version 2.0 (the 'License'). You may not use this file except in
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  10  * http://www.opensource.apple.com/apsl/ and read it before using this
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  23
  24 //
  25 // detachedrep - prefix diskrep representing a detached signature stored in a file
  26 //
  27 #ifndef _H_DETACHEDREP
  28 #define _H_DETACHEDREP
  29
  30 #include "diskrep.h"
  31 #include "sigblob.h"
  32
  33 namespace Security {
  34 namespace CodeSigning {
  35
  36
  37 //
  38 // We use a DetachedRep to interpose (filter) the genuine DiskRep representing
  39 // the code on disk, *if* a detached signature was set on this object. In this
  40 // situation, mRep will point to a (2 element) chain of DiskReps.
  41 //
  42 // This is a neat way of dealing with the (unusual) detached-signature case
  43 // without disturbing things unduly. Consider DetachedDiskRep to be closely
  44 // married to SecStaticCode; it's unlikely to work right if you use it elsewhere.
  45 //
  46 // Note that there's no *writing* code here. Writing detached signatures is handled
  47 // specially in the signing code.
  48 //
  49 class DetachedRep : public FilterRep {
  50 public:
  51         DetachedRep(CFDataRef sig, DiskRep *orig, const std::string &source); // SuperBlob of all architectures
  52         DetachedRep(CFDataRef sig, CFDataRef gsig, DiskRep *orig, const std::string &source); // one architecture + globals
  53
  54         CFDataRef component(CodeDirectory::SpecialSlot slot);
  55
  56         bool fullSignature() const { return mFull; }
  57         const std::string &source() const { return mSource; }
  58
  59 private:
  60         CFCopyRef<CFDataRef> mSig, mGSig;
  61         bool mFull;                                                             // full detached signature (explicitly given)
  62         const EmbeddedSignatureBlob *mArch;             // current architecture; points into mSignature
  63         const EmbeddedSignatureBlob *mGlobal;   // shared elements; points into mSignature
  64         std::string mSource;                                    // source description (readable)
  65 };
  66
  67
  68 } // end namespace CodeSigning
  69 } // end namespace Security
  70
  71 #endif // !_H_DETACHEDREP