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
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7//
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12// in the documentation and/or other materials provided with the
13// distribution.
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16// this software without specific prior written permission.
17//
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28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30// file_id.cc: Return a unique identifier for a file
31//
32// See file_id.h for documentation
33//
34// Author: Dan Waylonis
35
36#include "common/mac/file_id.h"
37
38#include <fcntl.h>
39#include <stdio.h>
40#include <string.h>
41
42#include "common/mac/macho_id.h"
43#include "common/scoped_ptr.h"
44
45using MacFileUtilities::MachoID;
46
47namespace google_breakpad {
48namespace mach_o {
49// Constructs a FileID given a path to a file
50FileID::FileID(const char* path) : memory_(nullptr), size_(0) {
51 snprintf(path_, sizeof(path_), "%s", path);
52}
53
54// Constructs a FileID given the contents of a file and its size
55FileID::FileID(void* memory, size_t size)
56 : path_(), memory_(memory), size_(size) {}
57
58bool FileID::MachoIdentifier(cpu_type_t cpu_type,
59 cpu_subtype_t cpu_subtype,
60 unsigned char identifier[16]) {
61 scoped_ptr<MachoID> macho;
62 if (memory_) {
63 macho.reset(new MachoID(memory_, size_));
64 } else {
65 macho.reset(new MachoID(path_));
66 }
67 if (macho->UUIDCommand(cpu_type, cpu_subtype, identifier))
68 return true;
69
70 return macho->MD5(cpu_type, cpu_subtype, identifier);
71}
72
73// static
74void FileID::ConvertIdentifierToString(const unsigned char identifier[16],
75 char *buffer, int buffer_length) {
76 int buffer_idx = 0;
77 for (int idx = 0; (buffer_idx < buffer_length) && (idx < 16); ++idx) {
78 int hi = (identifier[idx] >> 4) & 0x0F;
79 int lo = (identifier[idx]) & 0x0F;
80
81 if (idx == 4 || idx == 6 || idx == 8 || idx == 10)
82 buffer[buffer_idx++] = '-';
83
84 buffer[buffer_idx++] =
85 static_cast<char>((hi >= 10) ? ('A' + hi - 10) : ('0' + hi));
86 buffer[buffer_idx++] =
87 static_cast<char>((lo >= 10) ? ('A' + lo - 10) : ('0' + lo));
88 }
89
90 // NULL terminate
91 buffer[(buffer_idx < buffer_length) ? buffer_idx : buffer_idx - 1] = 0;
92}
93
94} // namespace mach_o
95} // namespace google_breakpad
96