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// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// macho_id.h: Functions to gather identifying information from a macho file
//
// Author: Dan Waylonis
#ifndef COMMON_MAC_MACHO_ID_H__
#define COMMON_MAC_MACHO_ID_H__
#include <limits.h>
#include <mach-o/loader.h>
#include <openssl/md5.h>
#include <openssl/sha.h>
namespace MacFileUtilities {
class MachoWalker;
class MachoID {
public:
MachoID(const char *path);
~MachoID();
// For the given |cpu_type|, return a UUID from the LC_UUID command.
// Return false if there isn't a LC_UUID command.
bool UUIDCommand(int cpu_type, unsigned char identifier[16]);
// For the given |cpu_type|, return a UUID from the LC_ID_DYLIB command.
// Return false if there isn't a LC_ID_DYLIB command.
bool IDCommand(int cpu_type, unsigned char identifier[16]);
// For the given |cpu_type|, return the Adler32 CRC for the mach-o data
// segment(s).
// Return 0 on error (e.g., if the file is not a mach-o file)
uint32_t Adler32(int cpu_type);
// For the given |cpu_type|, return the MD5 for the mach-o data segment(s).
// Return true on success, false otherwise
bool MD5(int cpu_type, unsigned char identifier[16]);
// For the given |cpu_type|, return the SHA1 for the mach-o data segment(s).
// Return true on success, false otherwise
bool SHA1(int cpu_type, unsigned char identifier[16]);
private:
// Signature of class member function to be called with data read from file
typedef void (MachoID::*UpdateFunction)(unsigned char *bytes, size_t size);
// Update the CRC value by examining |size| |bytes| and applying the algorithm
// to each byte.
void UpdateCRC(unsigned char *bytes, size_t size);
// Update the MD5 value by examining |size| |bytes| and applying the algorithm
// to each byte.
void UpdateMD5(unsigned char *bytes, size_t size);
// Update the SHA1 value by examining |size| |bytes| and applying the
// algorithm to each byte.
void UpdateSHA1(unsigned char *bytes, size_t size);
// Bottleneck for update routines
void Update(MachoWalker *walker, unsigned long offset, size_t size);
// The callback from the MachoWalker for CRC, MD5, and SHA1
static bool WalkerCB(MachoWalker *walker, load_command *cmd, off_t offset,
bool swap, void *context);
// The callback from the MachoWalker for LC_UUID
static bool UUIDWalkerCB(MachoWalker *walker, load_command *cmd, off_t offset,
bool swap, void *context);
// The callback from the MachoWalker for LC_ID_DYLIB
static bool IDWalkerCB(MachoWalker *walker, load_command *cmd, off_t offset,
bool swap, void *context);
// File path
char path_[PATH_MAX];
// File descriptor
int file_;
// The current crc value
uint32_t crc_;
// The MD5 context
MD5_CTX md5_context_;
// The SHA1 context
SHA_CTX sha1_context_;
// The current update to call from the Update callback
UpdateFunction update_function_;
};
} // namespace MacFileUtilities
#endif // COMMON_MAC_MACHO_ID_H__
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