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Flutterアプリの難読化とエラーレポート(iOS)
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Hiroki Matsue
December 06, 2018
Technology
2
1.7k
Flutterアプリの難読化とエラーレポート(iOS)
"Flutter Meetup Tokyo #6"で使った資料です。
https://flutter-jp.connpass.com/event/105834/
Hiroki Matsue
December 06, 2018
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Transcript
FlutterΞϓϦͷಡԽͱ ΤϥʔϨϙʔτ(iOS) Hiroki Matsue Dec 6th, 2018 Flutter Meetup Tokyo
#6
Hiroki Matsue (@macs_6)
FlutterͰIIJmio͚ʹ ʮΈ͓εΠονʯΛ ϦϦʔε
None
[࣭] FlutterͰΞϓϦΛ ϦϦʔε͍ͯ͠Δਓʁ
[࣭] ϦϦʔεલʹ ಡԽͨ͠ਓʁ
ϦϦʔεؔ࿈ͷυΩϡϝϯτ https://flutter.io/docs/deployment/ios
None
None
࠷ॳʹॻ͍͚ͯ͋ͬͨͲ ݟམͱͯͨ͠ (AndroidͷProGuardରԠͯͯ͠ؾ͍ͮͨ)
ͪͳΈʹ
(ϦϦʔεؔ࿈Ͱઢ) ΞΠίϯ࡞"flutterlaunchericons"͏ͱ 1ͭͷը૾͔Β͍͍ײ͡ʹ࡞ͬͯ͘ΕΔ
iOSDartίʔυ෦͕ ಡԽͷର
Δ͜ͱbuild࣌ʹ ΦϓγϣϯΛ͚ͭΔ͚ͩ (Կނ͔ॳظঢ়ଶͰରԠ͞Εͯͳ͍ ) https://github.com/flutter/flutter/wiki/Obfuscating-Dart-Code
<ProjectRoot>/ios/Flutter/Release.xcconfig EXTRA_GEN_SNAPSHOT_OPTIONS=--obfuscate
# <ProjectRoot>/packages/flutter_tools/bin/xcode_backend.sh local extra_gen_snapshot_options_or_none="" if [[ -n "$EXTRA_GEN_SNAPSHOT_OPTIONS" ]]; then
extra_gen_snapshot_options_or_none="--extra-gen-snapshot-options=$EXTRA_GEN_SNAPSHOT_OPTIONS" fi ... RunCommand "${FLUTTER_ROOT}/bin/flutter" --suppress-analytics \ ${verbose_flag} \ build aot \ --output-dir="${build_dir}/aot" \ --target-platform=ios \ --target="${target_path}" \ --${build_mode} \ --ios-arch="${archs}" \ ${local_engine_flag} \ ${track_widget_creation_flag} \ ${extra_gen_snapshot_options_or_none}
# <ProjectRoot>/packages/flutter_tools/bin/xcode_backend.sh local extra_gen_snapshot_options_or_none="" if [[ -n "$EXTRA_GEN_SNAPSHOT_OPTIONS" ]]; then
extra_gen_snapshot_options_or_none="--extra-gen-snapshot-options=$EXTRA_GEN_SNAPSHOT_OPTIONS" fi ... RunCommand "${FLUTTER_ROOT}/bin/flutter" --suppress-analytics \ ${verbose_flag} \ build aot \ --output-dir="${build_dir}/aot" \ --target-platform=ios \ --target="${target_path}" \ --${build_mode} \ --ios-arch="${archs}" \ ${local_engine_flag} \ ${track_widget_creation_flag} \ ${extra_gen_snapshot_options_or_none}
xcode_backend.sh ͱʁ Build PhaseͷRun ScriptͰΘΕ͍ͯΔεΫϦϓτ Xcode͔ΒDartίʔυ͕build͞ΕΔͷ͜Εͷ͓͔͛
(ઢ2) طଘΞϓϦʹFlutterΛಋೖ͢Δ࣌ xcode_backend.sh embed Add2AppϘʔυ্Ͱઈࢍ։ൃத
͜ΕͰϏϧυ͢Ε ಡԽྃʂ Χϯλϯʂ
ಡԽͷ֬ೝํ๏ʁ
App.frameworkΛ֬ೝ͢Δ $ strings build/ios/Release-iphoneos/Runner.app/Frameworks/App.framework/App ... get:_vxa@7048458x get:_aLa@9040228x get:_DLa@7048458x ...
ಡԽͷલޙͰൺֱ before get:_count@7048458 get:_onData@9040228 get:_isSubscribed@7048458 after get:_vxa@7048458x get:_aLa@9040228x get:_DLa@7048458x
Dartίʔυ͕ಡԽ͞Εͨ
...ϦϦʔεޙͷ͋Δ
None
SentryͷΤϥʔϨϙʔτ ಡԽ͞ΕͯΔ
ಡԽલͷΤϥʔϨϙʔτ
։ൃதؾ͔ͮͳ͔ͬͨ
ಡԽͷલޙͰൺֱ before main.dart in SampleApp.build at line 48 after SEd
in bZ.opa at line 48
ࣗಡΊͳ͍
ϦϦʔεࡁΞϓϦͷ Τϥʔݟ͍ͨ
mapϑΝΠϧΛग़ྗ͢Δ ઌ΄ͲͷυΩϡϝϯτʹ͋ͬͨઃఆ EXTRA_GEN_SNAPSHOT_OPTIONS=--obfuscate mapϑΝΠϧΛग़ྗ͢ΔઃఆΛՃ EXTRA_GEN_SNAPSHOT_OPTIONS=--obfuscate, ɹ --save-obfuscation-map=ios_dart_symbols_${FLUTTER_BUILD_NUMBER}.json
ग़ྗ͞ΕͨmapϑΝΠϧ $ cat ios_dart_symbols_5.json ... "_BuildJsonListener","_Gf", "CustomSymbolRenderer","cs", "devicePixelRatio","saa" ... ͜ΕΛࢀর͢ΕಡΊΔ
!
աڈʹϦϦʔεͨ͠ΞϓϦͷmapϑΝΠϧʁ ࢼͨ͠ͱ͜Ζɺ ੜݩͷίʔυ͕ಉ͡Ͱ͋Εmapಉ͡ʹͳͬͨ
·ͱΊ
·ͱΊ • FlutterͩͱiOSͰDartίʔυͷಡԽ࡞ۀ͕͋Δ • stringsίϚϯυͰνΣοΫ͢Δͷָ͕ • mapϑΝΠϧग़ྗ͓ͯ͘͠ͱSentryղಡʹ͑Δ # before main.dart
in SampleApp.build at line 48 # after SEd in bZ.opa at line 48
Έ͓εΠονɺੋඇ͝ར༻͍ͩ͘͞
Thanks