summaryrefslogtreecommitdiffstats
path: root/courgette/courgette_tool.cc
blob: 23322fd856f596abfd8d8024bdb11de3ec1a187d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <string>
#include <vector>

#include "base/at_exit.h"
#include "base/basictypes.h"
#include "base/command_line.h"
#include "base/file_util.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "courgette/courgette.h"
#include "courgette/streams.h"
#include "courgette/third_party/bsdiff.h"


void PrintHelp() {
  fprintf(stderr,
    "Usage:\n"
    "  courgette -supported <executable_file>\n"
    "  courgette -dis <executable_file> <binary_assembly_file>\n"
    "  courgette -asm <binary_assembly_file> <executable_file>\n"
    "  courgette -disadj <executable_file> <reference> <binary_assembly_file>\n"
    "  courgette -gen <v1> <v2> <patch>\n"
    "  courgette -apply <v1> <patch> <v2>\n"
    "\n");
}

void UsageProblem(const char* message) {
  fprintf(stderr, "%s", message);
  fprintf(stderr, "\n");
  PrintHelp();
  exit(1);
}

void Problem(const char* format, ...) {
  va_list args;
  va_start(args, format);
  vfprintf(stderr, format, args);
  fprintf(stderr, "\n");
  va_end(args);
  exit(1);
}

std::string ReadOrFail(const base::FilePath& file_name, const char* kind) {
  int64 file_size = 0;
  if (!base::GetFileSize(file_name, &file_size))
    Problem("Can't read %s file.", kind);
  std::string buffer;
  buffer.reserve(static_cast<size_t>(file_size));
  if (!base::ReadFileToString(file_name, &buffer))
    Problem("Can't read %s file.", kind);
  return buffer;
}

void WriteSinkToFile(const courgette::SinkStream *sink,
                     const base::FilePath& output_file) {
  int count =
      base::WriteFile(output_file,
                           reinterpret_cast<const char*>(sink->Buffer()),
                           static_cast<int>(sink->Length()));
  if (count == -1)
    Problem("Can't write output.");
  if (static_cast<size_t>(count) != sink->Length())
    Problem("Incomplete write.");
}

void Disassemble(const base::FilePath& input_file,
                 const base::FilePath& output_file) {
  std::string buffer = ReadOrFail(input_file, "input");

  courgette::AssemblyProgram* program = NULL;
  const courgette::Status parse_status =
      courgette::ParseDetectedExecutable(buffer.c_str(), buffer.length(),
                                         &program);

  if (parse_status != courgette::C_OK)
    Problem("Can't parse input.");

  courgette::EncodedProgram* encoded = NULL;
  const courgette::Status encode_status = Encode(program, &encoded);

  courgette::DeleteAssemblyProgram(program);

  if (encode_status != courgette::C_OK)
    Problem("Can't encode program.");

  courgette::SinkStreamSet sinks;

  const courgette::Status write_status =
    courgette::WriteEncodedProgram(encoded, &sinks);
  if (write_status != courgette::C_OK)
    Problem("Can't serialize encoded program.");

  courgette::DeleteEncodedProgram(encoded);

  courgette::SinkStream sink;
  if (!sinks.CopyTo(&sink))
    Problem("Can't combine serialized encoded program streams.");

  WriteSinkToFile(&sink, output_file);
}

bool Supported(const base::FilePath& input_file) {
  bool result = false;

  std::string buffer = ReadOrFail(input_file, "input");

  courgette::ExecutableType type;
  size_t detected_length;

  DetectExecutableType(buffer.c_str(), buffer.length(),
                       &type,
                       &detected_length);

  // If the detection fails, we just fall back on UNKNOWN
  std::string format = "Unsupported";

  switch (type)
  {
    case courgette::EXE_UNKNOWN:
      break;

    case courgette::EXE_WIN_32_X86:
      format = "Windows 32 PE";
      result = true;
      break;

    case courgette::EXE_ELF_32_X86:
      format = "ELF 32 X86";
      result = true;
      break;

    case courgette::EXE_ELF_32_ARM:
      format = "ELF 32 ARM";
      result = true;
      break;

    case courgette::EXE_WIN_32_X64:
      format = "Windows 64 PE";
      result = true;
      break;
  }

  printf("%s Executable\n", format.c_str());
  return result;
}

void DisassembleAndAdjust(const base::FilePath& program_file,
                          const base::FilePath& model_file,
                          const base::FilePath& output_file) {
  std::string program_buffer = ReadOrFail(program_file, "program");
  std::string model_buffer = ReadOrFail(model_file, "reference");

  courgette::AssemblyProgram* program = NULL;
  const courgette::Status parse_program_status =
      courgette::ParseDetectedExecutable(program_buffer.c_str(),
                                         program_buffer.length(),
                                         &program);
  if (parse_program_status != courgette::C_OK)
    Problem("Can't parse program input.");

  courgette::AssemblyProgram* model = NULL;
  const courgette::Status parse_model_status =
      courgette::ParseDetectedExecutable(model_buffer.c_str(),
                                         model_buffer.length(),
                                         &model);
  if (parse_model_status != courgette::C_OK)
    Problem("Can't parse model input.");

  const courgette::Status adjust_status = Adjust(*model, program);
  if (adjust_status != courgette::C_OK)
    Problem("Can't adjust program.");

  courgette::EncodedProgram* encoded = NULL;
  const courgette::Status encode_status = Encode(program, &encoded);

  courgette::DeleteAssemblyProgram(program);

  if (encode_status != courgette::C_OK)
    Problem("Can't encode program.");

  courgette::SinkStreamSet sinks;

  const courgette::Status write_status =
    courgette::WriteEncodedProgram(encoded, &sinks);
  if (write_status != courgette::C_OK)
    Problem("Can't serialize encoded program.");

  courgette::DeleteEncodedProgram(encoded);

  courgette::SinkStream sink;
  if (!sinks.CopyTo(&sink))
    Problem("Can't combine serialized encoded program streams.");

  WriteSinkToFile(&sink, output_file);
}

// Diffs two executable files, write a set of files for the diff, one file per
// stream of the EncodedProgram format.  Each file is the bsdiff between the
// original file's stream and the new file's stream.  This is completely
// uninteresting to users, but it is handy for seeing how much each which
// streams are contributing to the final file size.  Adjustment is optional.
void DisassembleAdjustDiff(const base::FilePath& model_file,
                           const base::FilePath& program_file,
                           const base::FilePath& output_file_root,
                           bool adjust) {
  std::string model_buffer = ReadOrFail(model_file, "'old'");
  std::string program_buffer = ReadOrFail(program_file, "'new'");

  courgette::AssemblyProgram* model = NULL;
  const courgette::Status parse_model_status =
      courgette::ParseDetectedExecutable(model_buffer.c_str(),
                                         model_buffer.length(),
                                         &model);
  if (parse_model_status != courgette::C_OK)
    Problem("Can't parse model input.");

  courgette::AssemblyProgram* program = NULL;
  const courgette::Status parse_program_status =
      courgette::ParseDetectedExecutable(program_buffer.c_str(),
                                         program_buffer.length(),
                                         &program);
  if (parse_program_status != courgette::C_OK)
    Problem("Can't parse program input.");

  if (adjust) {
    const courgette::Status adjust_status = Adjust(*model, program);
    if (adjust_status != courgette::C_OK)
      Problem("Can't adjust program.");
  }

  courgette::EncodedProgram* encoded_program = NULL;
  const courgette::Status encode_program_status =
      Encode(program, &encoded_program);
  courgette::DeleteAssemblyProgram(program);
  if (encode_program_status != courgette::C_OK)
    Problem("Can't encode program.");

  courgette::EncodedProgram* encoded_model = NULL;
  const courgette::Status encode_model_status = Encode(model, &encoded_model);
  courgette::DeleteAssemblyProgram(model);
  if (encode_model_status != courgette::C_OK)
    Problem("Can't encode model.");

  courgette::SinkStreamSet program_sinks;
  const courgette::Status write_program_status =
    courgette::WriteEncodedProgram(encoded_program, &program_sinks);
  if (write_program_status != courgette::C_OK)
    Problem("Can't serialize encoded program.");
  courgette::DeleteEncodedProgram(encoded_program);

  courgette::SinkStreamSet model_sinks;
  const courgette::Status write_model_status =
    courgette::WriteEncodedProgram(encoded_model, &model_sinks);
  if (write_model_status != courgette::C_OK)
    Problem("Can't serialize encoded model.");
  courgette::DeleteEncodedProgram(encoded_model);

  courgette::SinkStream empty_sink;
  for (int i = 0;  ; ++i) {
    courgette::SinkStream* old_stream = model_sinks.stream(i);
    courgette::SinkStream* new_stream = program_sinks.stream(i);
    if (old_stream == NULL && new_stream == NULL)
      break;

    courgette::SourceStream old_source;
    courgette::SourceStream new_source;
    old_source.Init(old_stream ? *old_stream : empty_sink);
    new_source.Init(new_stream ? *new_stream : empty_sink);
    courgette::SinkStream patch_stream;
    courgette::BSDiffStatus status =
        courgette::CreateBinaryPatch(&old_source, &new_source, &patch_stream);
    if (status != courgette::OK) Problem("-xxx failed.");

    std::string append = std::string("-") + base::IntToString(i);

    WriteSinkToFile(&patch_stream,
                    output_file_root.InsertBeforeExtensionASCII(append));
  }
}

void Assemble(const base::FilePath& input_file,
              const base::FilePath& output_file) {
  std::string buffer = ReadOrFail(input_file, "input");

  courgette::SourceStreamSet sources;
  if (!sources.Init(buffer.c_str(), buffer.length()))
    Problem("Bad input file.");

  courgette::EncodedProgram* encoded = NULL;
  const courgette::Status read_status = ReadEncodedProgram(&sources, &encoded);
  if (read_status != courgette::C_OK)
    Problem("Bad encoded program.");

  courgette::SinkStream sink;

  const courgette::Status assemble_status = courgette::Assemble(encoded, &sink);
  if (assemble_status != courgette::C_OK)
    Problem("Can't assemble.");

  WriteSinkToFile(&sink, output_file);
}

void GenerateEnsemblePatch(const base::FilePath& old_file,
                           const base::FilePath& new_file,
                           const base::FilePath& patch_file) {
  std::string old_buffer = ReadOrFail(old_file, "'old' input");
  std::string new_buffer = ReadOrFail(new_file, "'new' input");

  courgette::SourceStream old_stream;
  courgette::SourceStream new_stream;
  old_stream.Init(old_buffer);
  new_stream.Init(new_buffer);

  courgette::SinkStream patch_stream;
  courgette::Status status =
      courgette::GenerateEnsemblePatch(&old_stream, &new_stream, &patch_stream);

  if (status != courgette::C_OK) Problem("-gen failed.");

  WriteSinkToFile(&patch_stream, patch_file);
}

void ApplyEnsemblePatch(const base::FilePath& old_file,
                        const base::FilePath& patch_file,
                        const base::FilePath& new_file) {
  // We do things a little differently here in order to call the same Courgette
  // entry point as the installer.  That entry point point takes file names and
  // returns an status code but does not output any diagnostics.

  courgette::Status status =
      courgette::ApplyEnsemblePatch(old_file.value().c_str(),
                                    patch_file.value().c_str(),
                                    new_file.value().c_str());

  if (status == courgette::C_OK)
    return;

  // Diagnose the error.
  switch (status) {
    case courgette::C_BAD_ENSEMBLE_MAGIC:
      Problem("Not a courgette patch");
      break;

    case courgette::C_BAD_ENSEMBLE_VERSION:
      Problem("Wrong version patch");
      break;

    case courgette::C_BAD_ENSEMBLE_HEADER:
      Problem("Corrupt patch");
      break;

    case courgette::C_DISASSEMBLY_FAILED:
      Problem("Disassembly failed (could be because of memory issues)");
      break;

    case courgette::C_STREAM_ERROR:
      Problem("Stream error (likely out of memory or disk space)");
      break;

    default:
      break;
  }

  //  If we failed due to a missing input file, this will
  // print the message.
  std::string old_buffer = ReadOrFail(old_file, "'old' input");
  old_buffer.clear();
  std::string patch_buffer = ReadOrFail(patch_file, "'patch' input");
  patch_buffer.clear();

  // Non-input related errors:
  if (status == courgette::C_WRITE_OPEN_ERROR)
    Problem("Can't open output");
  if (status == courgette::C_WRITE_ERROR)
    Problem("Can't write output");

  Problem("-apply failed.");
}

void GenerateBSDiffPatch(const base::FilePath& old_file,
                         const base::FilePath& new_file,
                         const base::FilePath& patch_file) {
  std::string old_buffer = ReadOrFail(old_file, "'old' input");
  std::string new_buffer = ReadOrFail(new_file, "'new' input");

  courgette::SourceStream old_stream;
  courgette::SourceStream new_stream;
  old_stream.Init(old_buffer);
  new_stream.Init(new_buffer);

  courgette::SinkStream patch_stream;
  courgette::BSDiffStatus status =
      courgette::CreateBinaryPatch(&old_stream, &new_stream, &patch_stream);

  if (status != courgette::OK) Problem("-genbsdiff failed.");

  WriteSinkToFile(&patch_stream, patch_file);
}

void ApplyBSDiffPatch(const base::FilePath& old_file,
                      const base::FilePath& patch_file,
                      const base::FilePath& new_file) {
  std::string old_buffer = ReadOrFail(old_file, "'old' input");
  std::string patch_buffer = ReadOrFail(patch_file, "'patch' input");

  courgette::SourceStream old_stream;
  courgette::SourceStream patch_stream;
  old_stream.Init(old_buffer);
  patch_stream.Init(patch_buffer);

  courgette::SinkStream new_stream;
  courgette::BSDiffStatus status =
      courgette::ApplyBinaryPatch(&old_stream, &patch_stream, &new_stream);

  if (status != courgette::OK) Problem("-applybsdiff failed.");

  WriteSinkToFile(&new_stream, new_file);
}

int main(int argc, const char* argv[]) {
  base::AtExitManager at_exit_manager;
  CommandLine::Init(argc, argv);
  const CommandLine& command_line = *CommandLine::ForCurrentProcess();

  logging::LoggingSettings settings;
  settings.logging_dest = logging::LOG_TO_ALL;
  settings.log_file = FILE_PATH_LITERAL("courgette.log");
  (void)logging::InitLogging(settings);
  logging::SetMinLogLevel(logging::LOG_VERBOSE);

  bool cmd_sup = command_line.HasSwitch("supported");
  bool cmd_dis = command_line.HasSwitch("dis");
  bool cmd_asm = command_line.HasSwitch("asm");
  bool cmd_disadj = command_line.HasSwitch("disadj");
  bool cmd_make_patch = command_line.HasSwitch("gen");
  bool cmd_apply_patch = command_line.HasSwitch("apply");
  bool cmd_make_bsdiff_patch = command_line.HasSwitch("genbsdiff");
  bool cmd_apply_bsdiff_patch = command_line.HasSwitch("applybsdiff");
  bool cmd_spread_1_adjusted = command_line.HasSwitch("gen1a");
  bool cmd_spread_1_unadjusted = command_line.HasSwitch("gen1u");

  std::vector<base::FilePath> values;
  const CommandLine::StringVector& args = command_line.GetArgs();
  for (size_t i = 0; i < args.size(); ++i) {
    values.push_back(base::FilePath(args[i]));
  }

  // '-repeat=N' is for debugging.  Running many iterations can reveal leaks and
  // bugs in cleanup.
  int repeat_count = 1;
  std::string repeat_switch = command_line.GetSwitchValueASCII("repeat");
  if (!repeat_switch.empty())
    if (!base::StringToInt(repeat_switch, &repeat_count))
      repeat_count = 1;

  if (cmd_sup + cmd_dis + cmd_asm + cmd_disadj + cmd_make_patch +
      cmd_apply_patch + cmd_make_bsdiff_patch + cmd_apply_bsdiff_patch +
      cmd_spread_1_adjusted + cmd_spread_1_unadjusted
      != 1)
    UsageProblem(
        "Must have exactly one of:\n"
        "  -supported -asm, -dis, -disadj, -gen or -apply, -genbsdiff"
        " or -applybsdiff.");

  while (repeat_count-- > 0) {
    if (cmd_sup) {
      if (values.size() != 1)
        UsageProblem("-supported <executable_file>");
      return !Supported(values[0]);
    } else if (cmd_dis) {
        if (values.size() != 2)
          UsageProblem("-dis <executable_file> <courgette_file>");
        Disassemble(values[0], values[1]);
    } else if (cmd_asm) {
      if (values.size() != 2)
        UsageProblem("-asm <courgette_file_input> <executable_file_output>");
      Assemble(values[0], values[1]);
    } else if (cmd_disadj) {
      if (values.size() != 3)
        UsageProblem("-disadj <executable_file> <model> <courgette_file>");
      DisassembleAndAdjust(values[0], values[1], values[2]);
    } else if (cmd_make_patch) {
      if (values.size() != 3)
        UsageProblem("-gen <old_file> <new_file> <patch_file>");
      GenerateEnsemblePatch(values[0], values[1], values[2]);
    } else if (cmd_apply_patch) {
      if (values.size() != 3)
        UsageProblem("-apply <old_file> <patch_file> <new_file>");
      ApplyEnsemblePatch(values[0], values[1], values[2]);
    } else if (cmd_make_bsdiff_patch) {
      if (values.size() != 3)
        UsageProblem("-genbsdiff <old_file> <new_file> <patch_file>");
      GenerateBSDiffPatch(values[0], values[1], values[2]);
    } else if (cmd_apply_bsdiff_patch) {
      if (values.size() != 3)
        UsageProblem("-applybsdiff <old_file> <patch_file> <new_file>");
      ApplyBSDiffPatch(values[0], values[1], values[2]);
    } else if (cmd_spread_1_adjusted || cmd_spread_1_unadjusted) {
      if (values.size() != 3)
        UsageProblem("-gen1[au] <old_file> <new_file> <patch_files_root>");
      DisassembleAdjustDiff(values[0], values[1], values[2],
                            cmd_spread_1_adjusted);
    } else {
      UsageProblem("No operation specified");
    }
  }

  return 0;
}