102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
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// 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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// file_id.cc: Return a unique identifier for a file
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//
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// See file_id.h for documentation
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//
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// Author: Dan Waylonis
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include "common/mac/file_id.h"
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#include "common/mac/macho_id.h"
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using MacFileUtilities::MachoID;
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namespace google_breakpad {
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FileID::FileID(const char *path) {
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strlcpy(path_, path, sizeof(path_));
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}
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bool FileID::FileIdentifier(unsigned char identifier[16]) {
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int fd = open(path_, O_RDONLY);
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if (fd == -1)
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return false;
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MD5_CTX md5;
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MD5_Init(&md5);
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// Read 4k x 2 bytes at a time. This is faster than just 4k bytes, but
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// doesn't seem to be an unreasonable size for the stack.
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unsigned char buffer[4096 * 2];
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size_t buffer_size = sizeof(buffer);
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while ((buffer_size = read(fd, buffer, buffer_size) > 0)) {
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MD5_Update(&md5, buffer, buffer_size);
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}
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close(fd);
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MD5_Final(identifier, &md5);
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return true;
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}
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bool FileID::MachoIdentifier(int cpu_type, unsigned char identifier[16]) {
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MachoID macho(path_);
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if (macho.UUIDCommand(cpu_type, identifier))
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return true;
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return macho.MD5(cpu_type, identifier);
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}
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// static
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void FileID::ConvertIdentifierToString(const unsigned char identifier[16],
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char *buffer, int buffer_length) {
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int buffer_idx = 0;
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for (int idx = 0; (buffer_idx < buffer_length) && (idx < 16); ++idx) {
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int hi = (identifier[idx] >> 4) & 0x0F;
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int lo = (identifier[idx]) & 0x0F;
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if (idx == 4 || idx == 6 || idx == 8 || idx == 10)
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buffer[buffer_idx++] = '-';
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buffer[buffer_idx++] = (hi >= 10) ? 'A' + hi - 10 : '0' + hi;
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buffer[buffer_idx++] = (lo >= 10) ? 'A' + lo - 10 : '0' + lo;
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}
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// NULL terminate
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buffer[(buffer_idx < buffer_length) ? buffer_idx : buffer_idx - 1] = 0;
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}
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} // namespace google_breakpad
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