OSX/libsecurity_cdsa_utilities/lib/acl_codesigning.h

   1 /*
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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 //
  26 // acl_codesigning - ACL subject for signature of calling application
  27 //
  28 // Note:
  29 // Once upon a time, a code signature was a single binary blob, a "signature".
  30 // Then we added an optional second blob, a "comment". The comment was only
  31 // ancilliary (non-security) data first, but then we added more security data
  32 // to it later. Now, the security-relevant data is kept in a (signature, comment)
  33 // pair, all of which is relevant for the security of such subjects.
  34 // Don't read any particular semantics into this separation. It is historical only
  35 // (having to do with backward binary compatibility of ACL blobs).
  36 //
  37 #ifndef _H_ACL_CODESIGNING
  38 #define _H_ACL_CODESIGNING
  39
  40 #include <security_cdsa_utilities/cssmdata.h>
  41 #include <security_cdsa_utilities/cssmacl.h>
  42 #include <security_cdsa_utilities/osxverifier.h>
  43
  44 namespace Security {
  45
  46
  47 //
  48 // The CodeSignature subject type matches a code signature applied to the
  49 // disk image that originated the client process.
  50 //
  51 class CodeSignatureAclSubject : public AclSubject, public OSXVerifier {
  52 public:
  53         class Maker; friend class Maker;
  54
  55         static const size_t commentBagAlignment = 4;
  56
  57     CodeSignatureAclSubject(const SHA1::Byte *hash, const std::string &path)
  58                 : AclSubject(CSSM_ACL_SUBJECT_TYPE_CODE_SIGNATURE), OSXVerifier(hash, path) { }
  59
  60         CodeSignatureAclSubject(const OSXVerifier &verifier)
  61                 : AclSubject(CSSM_ACL_SUBJECT_TYPE_CODE_SIGNATURE), OSXVerifier(verifier) { }
  62
  63     bool validates(const AclValidationContext &baseCtx) const;
  64     CssmList toList(Allocator &alloc) const;
  65
  66     void exportBlob(Writer::Counter &pub, Writer::Counter &priv);
  67     void exportBlob(Writer &pub, Writer &priv);
  68
  69         IFDUMP(void debugDump() const);
  70
  71 public:
  72     class Environment : public virtual AclValidationEnvironment {
  73     public:
  74                 virtual bool verifyCodeSignature(const OSXVerifier &verifier,
  75                         const AclValidationContext &context) = 0;
  76     };
  77
  78 public:
  79     class Maker : public AclSubject::Maker {
  80     public:
  81         Maker()
  82                 : AclSubject::Maker(CSSM_ACL_SUBJECT_TYPE_CODE_SIGNATURE) { }
  83         CodeSignatureAclSubject *make(const TypedList &list) const;
  84         CodeSignatureAclSubject *make(Version version, Reader &pub, Reader &priv) const;
  85
  86         private:
  87                 CodeSignatureAclSubject *make(const SHA1::Byte *hash, const CssmData &commentBag) const;
  88     };
  89 };
  90
  91 } // end namespace Security
  92
  93
  94
  95 #endif //_H_ACL_CODESIGNING