1 // Copyright (c) 2006, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 // macho_id.h: Functions to gather identifying information from a macho file 31 // 32 // Author: Dan Waylonis 33 34 #ifndef COMMON_MAC_MACHO_ID_H__ 35 #define COMMON_MAC_MACHO_ID_H__ 36 37 #include <limits.h> 38 #include <mach/machine.h> 39 #include <mach-o/loader.h> 40 41 #include "common/mac/macho_walker.h" 42 #include "common/md5.h" 43 44 namespace MacFileUtilities { 45 46 class MachoID { 47 public: 48 MachoID(const char *path); 49 MachoID(const char *path, void *memory, size_t size); 50 ~MachoID(); 51 52 // For the given |cpu_type| and |cpu_subtype|, return a UUID from the LC_UUID 53 // command. 54 // Return false if there isn't a LC_UUID command. 55 bool UUIDCommand(cpu_type_t cpu_type, 56 cpu_subtype_t cpu_subtype, 57 unsigned char identifier[16]); 58 59 // For the given |cpu_type| and |cpu_subtype|, return a UUID from the 60 // LC_ID_DYLIB command. 61 // Return false if there isn't a LC_ID_DYLIB command. 62 bool IDCommand(cpu_type_t cpu_type, 63 cpu_subtype_t cpu_subtype, 64 unsigned char identifier[16]); 65 66 // For the given |cpu_type| and |cpu_subtype|, return the Adler32 CRC for the 67 // mach-o data segment(s). 68 // Return 0 on error (e.g., if the file is not a mach-o file) 69 uint32_t Adler32(cpu_type_t cpu_type, 70 cpu_subtype_t cpu_subtype); 71 72 // For the given |cpu_type|, and |cpu_subtype| return the MD5 for the mach-o 73 // data segment(s). 74 // Return true on success, false otherwise 75 bool MD5(cpu_type_t cpu_type, 76 cpu_subtype_t cpu_subtype, 77 unsigned char identifier[16]); 78 79 private: 80 // Signature of class member function to be called with data read from file 81 typedef void (MachoID::*UpdateFunction)(unsigned char *bytes, size_t size); 82 83 // Update the CRC value by examining |size| |bytes| and applying the algorithm 84 // to each byte. 85 void UpdateCRC(unsigned char *bytes, size_t size); 86 87 // Update the MD5 value by examining |size| |bytes| and applying the algorithm 88 // to each byte. 89 void UpdateMD5(unsigned char *bytes, size_t size); 90 91 // Bottleneck for update routines 92 void Update(MachoWalker *walker, off_t offset, size_t size); 93 94 // Factory for the MachoWalker 95 bool WalkHeader(cpu_type_t cpu_type, cpu_subtype_t cpu_subtype, 96 MachoWalker::LoadCommandCallback callback, void *context); 97 98 // The callback from the MachoWalker for CRC and MD5 99 static bool WalkerCB(MachoWalker *walker, load_command *cmd, off_t offset, 100 bool swap, void *context); 101 102 // The callback from the MachoWalker for LC_UUID 103 static bool UUIDWalkerCB(MachoWalker *walker, load_command *cmd, off_t offset, 104 bool swap, void *context); 105 106 // The callback from the MachoWalker for LC_ID_DYLIB 107 static bool IDWalkerCB(MachoWalker *walker, load_command *cmd, off_t offset, 108 bool swap, void *context); 109 110 // File path 111 char path_[PATH_MAX]; 112 113 // Memory region to read from 114 void *memory_; 115 116 // Size of the memory region 117 size_t memory_size_; 118 119 // The current crc value 120 uint32_t crc_; 121 122 // The MD5 context 123 google_breakpad::MD5Context md5_context_; 124 125 // The current update to call from the Update callback 126 UpdateFunction update_function_; 127 }; 128 129 } // namespace MacFileUtilities 130 131 #endif // COMMON_MAC_MACHO_ID_H__ 132