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Implement range-based pin list 

This extends the original pin list generation to support specifying a
range within a file.  If any part of a file is pinned, its local file
header in the APK file is pinned as well.

Test: Build cuttlefish.
Bug: 136040313
Bug: 135953430
Change-Id: I6de8c2b4c2f35c6bf257f61414c6bce761233e51
This commit is contained in:
Vic Yang 2019-07-09 10:09:35 -07:00
parent 6e3ae4e849
commit baa9f50cb2
1 changed files with 46 additions and 20 deletions
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66
tools/signapk/src/com/android/signapk/SignApk.java
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@ -381,9 +381,8 @@ class SignApk {
byte[] buffer = new byte[4096];
int num;
List<Pattern> pinPatterns = extractPinPatterns(in);
List<Hints.PatternWithRange> pinPatterns = extractPinPatterns(in);
ArrayList<Hints.ByteRange> pinByteRanges = pinPatterns == null ? null : new ArrayList<>();
HashSet<String> namesToPin = new HashSet<>();
ArrayList<String> names = new ArrayList<String>();
for (Enumeration<JarEntry> e = in.entries(); e.hasMoreElements();) {
@ -399,13 +398,6 @@ class SignApk {
if (Hints.PIN_BYTE_RANGE_ZIP_ENTRY_NAME.equals(entryName)) {
continue; // We regenerate it below.
}
if (pinPatterns != null) {
for (Pattern pinPattern : pinPatterns) {
if (pinPattern.matcher(entryName).matches()) {
namesToPin.add(entryName);
}
}
}
names.add(entryName);
}
Collections.sort(names);
@ -485,6 +477,7 @@ class SignApk {
DataSink entryDataSink =
(inspectEntryRequest != null) ? inspectEntryRequest.getDataSink() : null;
long entryDataStart = outCounter.getWrittenBytes();
try (InputStream data = in.getInputStream(inEntry)) {
while ((num = data.read(buffer)) > 0) {
out.write(buffer, 0, num);
@ -500,11 +493,27 @@ class SignApk {
inspectEntryRequest.done();
}
if (namesToPin.contains(name)) {
pinByteRanges.add(
new Hints.ByteRange(
entryHeaderStart,
outCounter.getWrittenBytes()));
if (pinPatterns != null) {
boolean pinFileHeader = false;
for (Hints.PatternWithRange pinPattern : pinPatterns) {
if (!pinPattern.matcher(name).matches()) {
continue;
}
Hints.ByteRange dataRange =
new Hints.ByteRange(
entryDataStart,
outCounter.getWrittenBytes());
Hints.ByteRange pinRange =
pinPattern.ClampToAbsoluteByteRange(dataRange);
if (pinRange != null) {
pinFileHeader = true;
pinByteRanges.add(pinRange);
}
}
if (pinFileHeader) {
pinByteRanges.add(new Hints.ByteRange(entryHeaderStart,
entryDataStart));
}
}
}
@ -528,6 +537,7 @@ class SignApk {
DataSink entryDataSink =
(inspectEntryRequest != null) ? inspectEntryRequest.getDataSink() : null;
long entryDataStart = outCounter.getWrittenBytes();
InputStream data = in.getInputStream(inEntry);
while ((num = data.read(buffer)) > 0) {
out.write(buffer, 0, num);
@ -541,11 +551,27 @@ class SignApk {
inspectEntryRequest.done();
}
if (namesToPin.contains(name)) {
pinByteRanges.add(
new Hints.ByteRange(
entryHeaderStart,
outCounter.getWrittenBytes()));
if (pinPatterns != null) {
boolean pinFileHeader = false;
for (Hints.PatternWithRange pinPattern : pinPatterns) {
if (!pinPattern.matcher(name).matches()) {
continue;
}
Hints.ByteRange dataRange =
new Hints.ByteRange(
entryDataStart,
outCounter.getWrittenBytes());
Hints.ByteRange pinRange =
pinPattern.ClampToAbsoluteByteRange(dataRange);
if (pinRange != null) {
pinFileHeader = true;
pinByteRanges.add(pinRange);
}
}
if (pinFileHeader) {
pinByteRanges.add(new Hints.ByteRange(entryHeaderStart,
entryDataStart));
}
}
}
@ -558,7 +584,7 @@ class SignApk {
}
}
private static List<Pattern> extractPinPatterns(JarFile in) throws IOException {
private static List<Hints.PatternWithRange> extractPinPatterns(JarFile in) throws IOException {
ZipEntry pinMetaEntry = in.getEntry(Hints.PIN_HINT_ASSET_ZIP_ENTRY_NAME);
if (pinMetaEntry == null) {
return null;