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Merge "Fix test harness mode" into sc-dev am: c11f9eca7b

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Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15359967

Change-Id: Iaee6a86cd18a20d5bba56ad125c3ebe4b6aebca5
This commit is contained in:
Howard Chen
2021-07-24 00:41:52 +00:00
committed by Automerger Merge Worker
parent c253e33e13 c11f9eca7b
commit 86d9125f3e
1 changed files with 25 additions and 2 deletions
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27
services/core/java/com/android/server/PersistentDataBlockService.java
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@@ -375,15 +375,38 @@ public class PersistentDataBlockService extends SystemService {
try {
FileChannel channel = getBlockOutputChannel();
// Format the data selectively.
//
// 1. write header, set length = 0
int header_size = DIGEST_SIZE_BYTES + HEADER_SIZE;
ByteBuffer buf = ByteBuffer.allocate(header_size);
buf.put(new byte[DIGEST_SIZE_BYTES]);
buf.putInt(PARTITION_TYPE_MARKER);
buf.putInt(0);
buf.flip();
channel.write(buf);
// corrupt the payload explicitly
channel.force(true);
// 2. corrupt the legacy FRP data explicitly
int payload_size = (int) getBlockDeviceSize() - header_size;
buf = ByteBuffer.allocate(payload_size);
buf = ByteBuffer.allocate(payload_size
- TEST_MODE_RESERVED_SIZE - FRP_CREDENTIAL_RESERVED_SIZE - 1);
channel.write(buf);
channel.force(true);
// 3. skip the test mode data and leave it unformat
// This is for a feature that enables testing.
channel.position(channel.position() + TEST_MODE_RESERVED_SIZE);
// 4. wipe the FRP_CREDENTIAL explicitly
buf = ByteBuffer.allocate(FRP_CREDENTIAL_RESERVED_SIZE);
channel.write(buf);
channel.force(true);
// 5. set unlock = 0 because it's a formatPartitionLocked
buf = ByteBuffer.allocate(FRP_CREDENTIAL_RESERVED_SIZE);
buf.put((byte)0);
buf.flip();
channel.write(buf);
channel.force(true);
} catch (IOException e) {