1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.server.pm; 18 19 import com.android.internal.util.XmlUtils; 20 21 import org.xmlpull.v1.XmlPullParser; 22 import org.xmlpull.v1.XmlPullParserException; 23 import org.xmlpull.v1.XmlSerializer; 24 25 import android.content.pm.Signature; 26 import android.util.Log; 27 28 import java.io.IOException; 29 import java.util.ArrayList; 30 31 class PackageSignatures { 32 Signature[] mSignatures; 33 34 PackageSignatures(PackageSignatures orig) { 35 if (orig != null && orig.mSignatures != null) { 36 mSignatures = orig.mSignatures.clone(); 37 } 38 } 39 40 PackageSignatures(Signature[] sigs) { 41 assignSignatures(sigs); 42 } 43 44 PackageSignatures() { 45 } 46 47 void writeXml(XmlSerializer serializer, String tagName, 48 ArrayList<Signature> pastSignatures) throws IOException { 49 if (mSignatures == null) { 50 return; 51 } 52 serializer.startTag(null, tagName); 53 serializer.attribute(null, "count", 54 Integer.toString(mSignatures.length)); 55 for (int i=0; i<mSignatures.length; i++) { 56 serializer.startTag(null, "cert"); 57 final Signature sig = mSignatures[i]; 58 final int sigHash = sig.hashCode(); 59 final int numPast = pastSignatures.size(); 60 int j; 61 for (j=0; j<numPast; j++) { 62 Signature pastSig = pastSignatures.get(j); 63 if (pastSig.hashCode() == sigHash && pastSig.equals(sig)) { 64 serializer.attribute(null, "index", Integer.toString(j)); 65 break; 66 } 67 } 68 if (j >= numPast) { 69 pastSignatures.add(sig); 70 serializer.attribute(null, "index", Integer.toString(numPast)); 71 serializer.attribute(null, "key", sig.toCharsString()); 72 } 73 serializer.endTag(null, "cert"); 74 } 75 serializer.endTag(null, tagName); 76 } 77 78 void readXml(XmlPullParser parser, ArrayList<Signature> pastSignatures) 79 throws IOException, XmlPullParserException { 80 String countStr = parser.getAttributeValue(null, "count"); 81 if (countStr == null) { 82 PackageManagerService.reportSettingsProblem(Log.WARN, 83 "Error in package manager settings: <signatures> has" 84 + " no count at " + parser.getPositionDescription()); 85 XmlUtils.skipCurrentTag(parser); 86 } 87 final int count = Integer.parseInt(countStr); 88 mSignatures = new Signature[count]; 89 int pos = 0; 90 91 int outerDepth = parser.getDepth(); 92 int type; 93 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 94 && (type != XmlPullParser.END_TAG 95 || parser.getDepth() > outerDepth)) { 96 if (type == XmlPullParser.END_TAG 97 || type == XmlPullParser.TEXT) { 98 continue; 99 } 100 101 String tagName = parser.getName(); 102 if (tagName.equals("cert")) { 103 if (pos < count) { 104 String index = parser.getAttributeValue(null, "index"); 105 if (index != null) { 106 try { 107 int idx = Integer.parseInt(index); 108 String key = parser.getAttributeValue(null, "key"); 109 if (key == null) { 110 if (idx >= 0 && idx < pastSignatures.size()) { 111 Signature sig = pastSignatures.get(idx); 112 if (sig != null) { 113 mSignatures[pos] = pastSignatures.get(idx); 114 pos++; 115 } else { 116 PackageManagerService.reportSettingsProblem(Log.WARN, 117 "Error in package manager settings: <cert> " 118 + "index " + index + " is not defined at " 119 + parser.getPositionDescription()); 120 } 121 } else { 122 PackageManagerService.reportSettingsProblem(Log.WARN, 123 "Error in package manager settings: <cert> " 124 + "index " + index + " is out of bounds at " 125 + parser.getPositionDescription()); 126 } 127 } else { 128 while (pastSignatures.size() <= idx) { 129 pastSignatures.add(null); 130 } 131 Signature sig = new Signature(key); 132 pastSignatures.set(idx, sig); 133 mSignatures[pos] = sig; 134 pos++; 135 } 136 } catch (NumberFormatException e) { 137 PackageManagerService.reportSettingsProblem(Log.WARN, 138 "Error in package manager settings: <cert> " 139 + "index " + index + " is not a number at " 140 + parser.getPositionDescription()); 141 } catch (IllegalArgumentException e) { 142 PackageManagerService.reportSettingsProblem(Log.WARN, 143 "Error in package manager settings: <cert> " 144 + "index " + index + " has an invalid signature at " 145 + parser.getPositionDescription() + ": " 146 + e.getMessage()); 147 } 148 } else { 149 PackageManagerService.reportSettingsProblem(Log.WARN, 150 "Error in package manager settings: <cert> has" 151 + " no index at " + parser.getPositionDescription()); 152 } 153 } else { 154 PackageManagerService.reportSettingsProblem(Log.WARN, 155 "Error in package manager settings: too " 156 + "many <cert> tags, expected " + count 157 + " at " + parser.getPositionDescription()); 158 } 159 } else { 160 PackageManagerService.reportSettingsProblem(Log.WARN, 161 "Unknown element under <cert>: " 162 + parser.getName()); 163 } 164 XmlUtils.skipCurrentTag(parser); 165 } 166 167 if (pos < count) { 168 // Should never happen -- there is an error in the written 169 // settings -- but if it does we don't want to generate 170 // a bad array. 171 Signature[] newSigs = new Signature[pos]; 172 System.arraycopy(mSignatures, 0, newSigs, 0, pos); 173 mSignatures = newSigs; 174 } 175 } 176 177 void assignSignatures(Signature[] sigs) { 178 if (sigs == null) { 179 mSignatures = null; 180 return; 181 } 182 mSignatures = new Signature[sigs.length]; 183 for (int i=0; i<sigs.length; i++) { 184 mSignatures[i] = sigs[i]; 185 } 186 } 187 188 @Override 189 public String toString() { 190 StringBuffer buf = new StringBuffer(128); 191 buf.append("PackageSignatures{"); 192 buf.append(Integer.toHexString(System.identityHashCode(this))); 193 buf.append(" ["); 194 if (mSignatures != null) { 195 for (int i=0; i<mSignatures.length; i++) { 196 if (i > 0) buf.append(", "); 197 buf.append(Integer.toHexString( 198 System.identityHashCode(mSignatures[i]))); 199 } 200 } 201 buf.append("]}"); 202 return buf.toString(); 203 } 204 }
