Security-55163.44.tar.gz

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

diff --git a/libsecurity_codesigning/lib/reqdumper.h b/libsecurity_codesigning/lib/reqdumper.h
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+/*
+ * Copyright (c) 2006-2007 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@
+ */
+
+//
+// reqdumper - Requirement un-parsing (disassembly)
+//
+#ifndef _H_REQDUMPER
+#define _H_REQDUMPER
+
+#include "reqreader.h"
+#include <ctype.h>
+
+
+namespace Security {
+namespace CodeSigning {
+
+
+//
+// A decompiler for (compiled) requirements programs.
+// This is intended to produce compiler-ready source, and the
+// (decompile . compile) cycle is meant to be loss-less.
+//
+// Note that a Dumper is a type of Interpreter, so it can use the program stream
+// accessors of the Interpreter. However, the evaluaton Context is absent, so
+// actual validation functions must not be called.
+//
+class Dumper : public Requirement::Reader {
+public:
+       explicit Dumper(const Requirement *req, bool debug = false)
+               : Reader(req), mDebug(debug) { }
+       
+       enum SyntaxLevel {
+               slPrimary,              // syntax primary
+               slAnd,                  // conjunctive
+               slOr,                   // disjunctive
+               slTop                   // where we start
+       };
+       
+       void dump();            // decompile this (entire) requirement
+       void expr(SyntaxLevel level = slTop); // decompile one requirement expression
+       
+       std::string value() const { return mOutput; }
+       operator std::string () const { return value(); }
+       
+       typedef unsigned char Byte;
+       
+public:
+       // all-in-one dumping
+       static string dump(const Requirements *reqs, bool debug = false);
+       static string dump(const Requirement *req, bool debug = false);
+       static string dump(const BlobCore *req, bool debug = false);    // dumps either
+
+protected:
+       enum PrintMode {
+               isSimple,               // printable and does not require quotes
+               isPrintable,    // can be quoted safely
+               isBinary                // contains binary bytes (use 0xnnn form)
+       };
+       void data(PrintMode bestMode = isSimple, bool dotOkay = false);
+       void dotString() { data(isSimple, true); }
+       void quotedString() { data(isPrintable); }
+       void hashData();        // H"bytes"
+       void certSlot();        // symbolic certificate slot indicator (explicit)
+       void match();           // a match suffix (op + value)
+       
+       void print(const char *format, ...);
+
+private:
+       void printBytes(const Byte *data, size_t length); // just write hex bytes
+       
+private:
+       std::string mOutput;            // output accumulator
+       bool mDebug;                            // include debug output in mOutput
+};
+
+
+}      // CodeSigning
+}      // Security
+
+#endif //_H_REQDUMPER