/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.pm;
import com.android.internal.util.XmlUtils;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;
import android.content.pm.Signature;
import android.util.Log;
import java.io.IOException;
import java.util.ArrayList;
class PackageSignatures {
Signature[] mSignatures;
PackageSignatures(PackageSignatures orig) {
if (orig != null && orig.mSignatures != null) {
mSignatures = orig.mSignatures.clone();
}
}
PackageSignatures(Signature[] sigs) {
assignSignatures(sigs);
}
PackageSignatures() {
}
void writeXml(XmlSerializer serializer, String tagName,
ArrayList<Signature> pastSignatures) throws IOException {
if (mSignatures == null) {
return;
}
serializer.startTag(null, tagName);
serializer.attribute(null, "count",
Integer.toString(mSignatures.length));
for (int i=0; i<mSignatures.length; i++) {
serializer.startTag(null, "cert");
final Signature sig = mSignatures[i];
final int sigHash = sig.hashCode();
final int numPast = pastSignatures.size();
int j;
for (j=0; j<numPast; j++) {
Signature pastSig = pastSignatures.get(j);
if (pastSig.hashCode() == sigHash && pastSig.equals(sig)) {
serializer.attribute(null, "index", Integer.toString(j));
break;
}
}
if (j >= numPast) {
pastSignatures.add(sig);
serializer.attribute(null, "index", Integer.toString(numPast));
serializer.attribute(null, "key", sig.toCharsString());
}
serializer.endTag(null, "cert");
}
serializer.endTag(null, tagName);
}
void readXml(XmlPullParser parser, ArrayList<Signature> pastSignatures)
throws IOException, XmlPullParserException {
String countStr = parser.getAttributeValue(null, "count");
if (countStr == null) {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Error in package manager settings: <signatures> has"
+ " no count at " + parser.getPositionDescription());
XmlUtils.skipCurrentTag(parser);
}
final int count = Integer.parseInt(countStr);
mSignatures = new Signature[count];
int pos = 0;
int outerDepth = parser.getDepth();
int type;
while ((type=parser.next()) != XmlPullParser.END_DOCUMENT
&& (type != XmlPullParser.END_TAG
|| parser.getDepth() > outerDepth)) {
if (type == XmlPullParser.END_TAG
|| type == XmlPullParser.TEXT) {
continue;
}
String tagName = parser.getName();
if (tagName.equals("cert")) {
if (pos < count) {
String index = parser.getAttributeValue(null, "index");
if (index != null) {
try {
int idx = Integer.parseInt(index);
String key = parser.getAttributeValue(null, "key");
if (key == null) {
if (idx >= 0 && idx < pastSignatures.size()) {
Signature sig = pastSignatures.get(idx);
if (sig != null) {
mSignatures[pos] = pastSignatures.get(idx);
pos++;
} else {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Error in package manager settings: <cert> "
+ "index " + index + " is not defined at "
+ parser.getPositionDescription());
}
} else {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Error in package manager settings: <cert> "
+ "index " + index + " is out of bounds at "
+ parser.getPositionDescription());
}
} else {
while (pastSignatures.size() <= idx) {
pastSignatures.add(null);
}
Signature sig = new Signature(key);
pastSignatures.set(idx, sig);
mSignatures[pos] = sig;
pos++;
}
} catch (NumberFormatException e) {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Error in package manager settings: <cert> "
+ "index " + index + " is not a number at "
+ parser.getPositionDescription());
} catch (IllegalArgumentException e) {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Error in package manager settings: <cert> "
+ "index " + index + " has an invalid signature at "
+ parser.getPositionDescription() + ": "
+ e.getMessage());
}
} else {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Error in package manager settings: <cert> has"
+ " no index at " + parser.getPositionDescription());
}
} else {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Error in package manager settings: too "
+ "many <cert> tags, expected " + count
+ " at " + parser.getPositionDescription());
}
} else {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Unknown element under <cert>: "
+ parser.getName());
}
XmlUtils.skipCurrentTag(parser);
}
if (pos < count) {
// Should never happen -- there is an error in the written
// settings -- but if it does we don't want to generate
// a bad array.
Signature[] newSigs = new Signature[pos];
System.arraycopy(mSignatures, 0, newSigs, 0, pos);
mSignatures = newSigs;
}
}
void assignSignatures(Signature[] sigs) {
if (sigs == null) {
mSignatures = null;
return;
}
mSignatures = new Signature[sigs.length];
for (int i=0; i<sigs.length; i++) {
mSignatures[i] = sigs[i];
}
}
@Override
public String toString() {
StringBuffer buf = new StringBuffer(128);
buf.append("PackageSignatures{");
buf.append(Integer.toHexString(System.identityHashCode(this)));
buf.append(" [");
if (mSignatures != null) {
for (int i=0; i<mSignatures.length; i++) {
if (i > 0) buf.append(", ");
buf.append(Integer.toHexString(
System.identityHashCode(mSignatures[i])));
}
}
buf.append("]}");
return buf.toString();
}
}