diff options
Diffstat (limited to 'services/core/java/com/android/server/pm/PackageSignatures.java')
| -rw-r--r-- | services/core/java/com/android/server/pm/PackageSignatures.java | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/pm/PackageSignatures.java b/services/core/java/com/android/server/pm/PackageSignatures.java new file mode 100644 index 0000000..9a20be7 --- /dev/null +++ b/services/core/java/com/android/server/pm/PackageSignatures.java @@ -0,0 +1,204 @@ +/* + * 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(); + } +}
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