GingerCal 1.1: apksigner v1 signing so Android 2.3 installs it; add Pangolin VPS setup notes
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@@ -1,46 +1,87 @@
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#!/bin/sh
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# Builds GingerCal.apk for Android 2.3 (API 10) without Gradle or aapt.
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# Builds GingerCal.apk for Android 2.3 (API 10) without Gradle.
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#
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# Needs: JDK 11+ (javac, keytool, jarsigner), python3 with Pillow (icon), and d8.
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# D8 command that runs d8 (default: "d8" from Android SDK build-tools on PATH)
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# ANDROID_JAR optional: a real platforms/android-10/android.jar; otherwise ./stubs is used
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# KEYSTORE optional: signing keystore (created on first build; keep it to allow upgrades)
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# Needs: JDK 11+ (javac, keytool), python3 with Pillow (icon), and three tools:
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# D8 command that runs d8 (Android SDK build-tools; default "d8" on PATH)
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# APKTOOL path to apktool.jar (https://apktool.org; bundles aapt and smali)
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# APKSIGNER path to apksigner.jar (Android SDK build-tools/<ver>/lib/apksigner.jar)
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# Optional:
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# ANDROID_JAR a real platforms/android-10/android.jar; otherwise ./stubs is used to compile
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# KEYSTORE signing keystore (created on first build; keep it so updates install over)
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set -eu
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cd "$(dirname "$0")"
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OUT=build
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D8=${D8:-d8}
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APKTOOL=${APKTOOL:?set APKTOOL=/path/to/apktool.jar}
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APKSIGNER=${APKSIGNER:?set APKSIGNER=/path/to/apksigner.jar}
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KS=${KEYSTORE:-gingercal.keystore}
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VERSION_CODE=$(sed -n 's/.*android:versionCode="\([0-9]*\)".*/\1/p' AndroidManifest.xml)
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VERSION_NAME=$(sed -n 's/.*android:versionName="\([^"]*\)".*/\1/p' AndroidManifest.xml)
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rm -rf "$OUT"
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mkdir -p "$OUT/stubs" "$OUT/classes" "$OUT/dex"
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mkdir -p "$OUT/stubs" "$OUT/classes" "$OUT/dex" "$OUT/apk/res/drawable" "$OUT/apk/res/drawable-ldpi"
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# 1. compile
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if [ -n "${ANDROID_JAR:-}" ]; then
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CP="$ANDROID_JAR"
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else
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javac -nowarn -Xlint:none --release 8 -d "$OUT/stubs" $(find stubs -name "*.java") 2>/dev/null
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CP="$OUT/stubs"
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fi
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# Java 8 bytecode, Java 6-era APIs only (Android 2.3 runs a Harmony class library).
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javac --release 8 -encoding UTF-8 -Xlint:-options -cp "$CP" -d "$OUT/classes" $(find src android -name '*.java')
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python3 tools/strip_method_params.py $(find "$OUT/classes" -name '*.class')
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# dex format 035 for Dalvik
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# (d8 warns about library classes it can't see; harmless since nothing needs desugaring)
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# 2. dex (format 035 for Dalvik), then disassemble so smali re-assembles a clean dex
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$D8 --min-api 9 --release --output "$OUT/dex" $(find "$OUT/classes" -name '*.class') >"$OUT/d8.log" 2>&1 \
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|| { cat "$OUT/d8.log"; exit 1; }
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mkdir -p "$OUT/tools"
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javac -nowarn -cp "$APKTOOL" -d "$OUT/tools" tools/Disassemble.java
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java -cp "$APKTOOL:$OUT/tools" Disassemble "$OUT/dex/classes.dex" "$OUT/apk/smali" 8
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python3 tools/mkicon.py "$OUT/icon.png"
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python3 tools/mkapk.py AndroidManifest.xml "$OUT/dex/classes.dex" "$OUT/icon.png" "$OUT/unsigned.apk"
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# 3. resources + manifest, compiled by real aapt (v1, the tool of the Gingerbread era)
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cp AndroidManifest.xml "$OUT/apk/"
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cp -r res/values "$OUT/apk/res/"
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python3 tools/mkicon.py "$OUT/apk/res/drawable/icon.png" 48
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python3 tools/mkicon.py "$OUT/apk/res/drawable-ldpi/icon.png" 36
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cat > "$OUT/apk/apktool.yml" <<EOF
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version: 2.9.3
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apkFileName: GingerCal.apk
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isFrameworkApk: false
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usesFramework:
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ids:
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- 1
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tag: null
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sdkInfo:
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minSdkVersion: 8
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targetSdkVersion: 10
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packageInfo:
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forcedPackageId: 127
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renameManifestPackage: null
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versionInfo:
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versionCode: $VERSION_CODE
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versionName: $VERSION_NAME
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resourcesAreCompressed: false
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sharedLibrary: false
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sparseResources: false
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doNotCompress:
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- resources.arsc
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- png
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EOF
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java -jar "$APKTOOL" -q b --use-aapt1 -api 8 -f -o "$OUT/unsigned.apk" "$OUT/apk"
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# 4. sign. Android < 4.3 needs a plain v1 (JAR) signature with SHA-1 and no PKCS#7 signed
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# attributes; apksigner picks exactly that for --min-sdk-version 8. (jarsigner does not.)
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if [ ! -f "$KS" ]; then
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keytool -genkeypair -keystore "$KS" -storetype PKCS12 -storepass android -keypass android \
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-alias gingercal -keyalg RSA -keysize 2048 -sigalg SHA1withRSA -validity 10000 -dname "CN=GingerCal" 2>/dev/null
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fi
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cp "$OUT/unsigned.apk" "$OUT/signed.apk"
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# Android < 4.3 only verifies SHA-1 JAR signatures.
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jarsigner -keystore "$KS" -storepass android -digestalg SHA1 -sigalg SHA1withRSA \
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"$OUT/signed.apk" gingercal >/dev/null
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java -jar "$APKSIGNER" sign --ks "$KS" --ks-key-alias gingercal --ks-pass pass:android --key-pass pass:android \
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--min-sdk-version 8 --v1-signing-enabled true --v2-signing-enabled false --v3-signing-enabled false \
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--v4-signing-enabled false --out "$OUT/signed.apk" "$OUT/unsigned.apk"
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python3 tools/zipalign.py "$OUT/signed.apk" GingerCal.apk
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# 5. refuse to ship anything Android 2.3 would reject
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java -jar "$APKSIGNER" verify --min-sdk-version 8 --max-sdk-version 10 GingerCal.apk
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python3 tools/check_dex.py GingerCal.apk
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ls -l GingerCal.apk
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