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Workaround potential OOM when signing APKs

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topjohnwu 2025-02-13 22:04:14 -08:00 committed by John Wu
parent f5f9b285c0
commit 79af2787ae
2 changed files with 7 additions and 3 deletions
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5
app/core/src/main/java/com/topjohnwu/magisk/core/signing/ByteArrayStream.java
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@ -4,6 +4,7 @@ import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
public class ByteArrayStream extends ByteArrayOutputStream {
@ -27,4 +28,8 @@ public class ByteArrayStream extends ByteArrayOutputStream {
public ByteArrayInputStream getInputStream() {
return new ByteArrayInputStream(buf, 0, count);
}
public ByteBuffer toByteBuffer() {
return ByteBuffer.wrap(buf, 0, count);
}
}

5
app/core/src/main/java/com/topjohnwu/magisk/core/signing/SignApk.java
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@ -510,7 +510,7 @@ public class SignApk {
privateKey[0] = key;
// Generate, in memory, an APK signed using standard JAR Signature Scheme.
ByteArrayOutputStream v1SignedApkBuf = new ByteArrayOutputStream();
ByteArrayStream v1SignedApkBuf = new ByteArrayStream();
JarOutputStream outputJar = new JarOutputStream(v1SignedApkBuf);
// Use maximum compression for compressed entries because the APK lives forever on
// the system partition.
@ -519,8 +519,7 @@ public class SignApk {
copyFiles(manifest, inputJar, outputJar, timestamp, alignment);
signFile(manifest, publicKey, privateKey, timestamp, outputJar);
outputJar.close();
ByteBuffer v1SignedApk = ByteBuffer.wrap(v1SignedApkBuf.toByteArray());
v1SignedApkBuf.reset();
ByteBuffer v1SignedApk = v1SignedApkBuf.toByteBuffer();
ByteBuffer[] outputChunks;
List<ApkSignerV2.SignerConfig> signerConfigs = createV2SignerConfigs(privateKey, publicKey,