| // 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. |
| |
| // file_id.cc: Return a unique identifier for a file |
| // |
| // See file_id.h for documentation |
| // |
| // Author: Dan Waylonis |
| |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "common/mac/file_id.h" |
| #include "common/mac/macho_id.h" |
| |
| using MacFileUtilities::MachoID; |
| |
| namespace google_breakpad { |
| |
| FileID::FileID(const char *path) { |
| snprintf(path_, sizeof(path_), "%s", path); |
| } |
| |
| bool FileID::FileIdentifier(unsigned char identifier[16]) { |
| int fd = open(path_, O_RDONLY); |
| if (fd == -1) |
| return false; |
| |
| MD5Context md5; |
| MD5Init(&md5); |
| |
| // Read 4k x 2 bytes at a time. This is faster than just 4k bytes, but |
| // doesn't seem to be an unreasonable size for the stack. |
| unsigned char buffer[4096 * 2]; |
| size_t buffer_size = sizeof(buffer); |
| while ((buffer_size = read(fd, buffer, buffer_size) > 0)) { |
| MD5Update(&md5, buffer, static_cast<unsigned>(buffer_size)); |
| } |
| |
| close(fd); |
| MD5Final(identifier, &md5); |
| |
| return true; |
| } |
| |
| bool FileID::MachoIdentifier(cpu_type_t cpu_type, |
| cpu_subtype_t cpu_subtype, |
| unsigned char identifier[16]) { |
| MachoID macho(path_); |
| |
| if (macho.UUIDCommand(cpu_type, cpu_subtype, identifier)) |
| return true; |
| |
| return macho.MD5(cpu_type, cpu_subtype, identifier); |
| } |
| |
| // static |
| void FileID::ConvertIdentifierToString(const unsigned char identifier[16], |
| char *buffer, int buffer_length) { |
| int buffer_idx = 0; |
| for (int idx = 0; (buffer_idx < buffer_length) && (idx < 16); ++idx) { |
| int hi = (identifier[idx] >> 4) & 0x0F; |
| int lo = (identifier[idx]) & 0x0F; |
| |
| if (idx == 4 || idx == 6 || idx == 8 || idx == 10) |
| buffer[buffer_idx++] = '-'; |
| |
| buffer[buffer_idx++] = |
| static_cast<char>((hi >= 10) ? ('A' + hi - 10) : ('0' + hi)); |
| buffer[buffer_idx++] = |
| static_cast<char>((lo >= 10) ? ('A' + lo - 10) : ('0' + lo)); |
| } |
| |
| // NULL terminate |
| buffer[(buffer_idx < buffer_length) ? buffer_idx : buffer_idx - 1] = 0; |
| } |
| |
| } // namespace google_breakpad |