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