Home | History | Annotate | Download | only in pm 
      1 /*
      2  * Copyright (C) 2013 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 android.util.ArrayMap;
     20 
     21 import com.android.internal.util.ArrayUtils;
     22 
     23 public class PackageKeySetData {
     24 
     25     static final long KEYSET_UNASSIGNED = -1;
     26 
     27     /* KeySet containing all signing keys - superset of the others */
     28     private long mProperSigningKeySet;
     29 
     30     private long[] mSigningKeySets;
     31 
     32     private long[] mUpgradeKeySets;
     33 
     34     private long[] mDefinedKeySets;
     35 
     36     private final ArrayMap<String, Long> mKeySetAliases = new ArrayMap<String, Long>();
     37 
     38     PackageKeySetData() {
     39         mProperSigningKeySet = KEYSET_UNASSIGNED;
     40     }
     41 
     42     PackageKeySetData(PackageKeySetData original) {
     43         mProperSigningKeySet = original.mProperSigningKeySet;
     44         mSigningKeySets = ArrayUtils.cloneOrNull(original.mSigningKeySets);
     45         mUpgradeKeySets = ArrayUtils.cloneOrNull(original.mUpgradeKeySets);
     46         mDefinedKeySets = ArrayUtils.cloneOrNull(original.mDefinedKeySets);
     47         mKeySetAliases.putAll(original.mKeySetAliases);
     48     }
     49 
     50     protected void setProperSigningKeySet(long ks) {
     51         if (ks == mProperSigningKeySet) {
     52 
     53             /* nothing to change */
     54             return;
     55         }
     56 
     57         /* otherwise, our current signing keysets are likely invalid */
     58         removeAllSigningKeySets();
     59         mProperSigningKeySet = ks;
     60         addSigningKeySet(ks);
     61         return;
     62     }
     63 
     64     protected long getProperSigningKeySet() {
     65         return mProperSigningKeySet;
     66     }
     67 
     68     protected void addSigningKeySet(long ks) {
     69         mSigningKeySets = ArrayUtils.appendLong(mSigningKeySets, ks);
     70     }
     71 
     72     protected void removeSigningKeySet(long ks) {
     73         mSigningKeySets = ArrayUtils.removeLong(mSigningKeySets, ks);
     74     }
     75 
     76     protected void addUpgradeKeySet(String alias) {
     77 
     78         /* must have previously been defined */
     79         Long ks = mKeySetAliases.get(alias);
     80         if (ks != null) {
     81             mUpgradeKeySets = ArrayUtils.appendLong(mUpgradeKeySets, ks);
     82         } else {
     83             throw new IllegalArgumentException("Upgrade keyset alias " + alias
     84                     + "does not refer to a defined keyset alias!");
     85         }
     86     }
     87 
     88     /*
     89      * Used only when restoring keyset data from persistent storage.  Must
     90      * correspond to a defined-keyset.
     91      */
     92     protected void addUpgradeKeySetById(long ks) {
     93         mSigningKeySets = ArrayUtils.appendLong(mSigningKeySets, ks);
     94     }
     95 
     96     protected void addDefinedKeySet(long ks, String alias) {
     97         mDefinedKeySets = ArrayUtils.appendLong(mDefinedKeySets, ks);
     98         mKeySetAliases.put(alias, ks);
     99     }
    100 
    101     protected void removeAllSigningKeySets() {
    102         mProperSigningKeySet = KEYSET_UNASSIGNED;
    103         mSigningKeySets = null;
    104         return;
    105     }
    106 
    107     protected void removeAllUpgradeKeySets() {
    108         mUpgradeKeySets = null;
    109         return;
    110     }
    111 
    112     protected void removeAllDefinedKeySets() {
    113         mDefinedKeySets = null;
    114         mKeySetAliases.clear();
    115         return;
    116     }
    117 
    118     protected boolean packageIsSignedBy(long ks) {
    119         return ArrayUtils.contains(mSigningKeySets, ks);
    120     }
    121 
    122     protected long[] getSigningKeySets() {
    123         return mSigningKeySets;
    124     }
    125 
    126     protected long[] getUpgradeKeySets() {
    127         return mUpgradeKeySets;
    128     }
    129 
    130     protected long[] getDefinedKeySets() {
    131         return mDefinedKeySets;
    132     }
    133 
    134     protected ArrayMap<String, Long> getAliases() {
    135         return mKeySetAliases;
    136     }
    137 
    138     protected boolean isUsingDefinedKeySets() {
    139 
    140         /* should never be the case that mDefinedKeySets.length == 0 */
    141         return (mDefinedKeySets != null && mDefinedKeySets.length > 0);
    142     }
    143 
    144     protected boolean isUsingUpgradeKeySets() {
    145 
    146         /* should never be the case that mUpgradeKeySets.length == 0 */
    147         return (mUpgradeKeySets != null && mUpgradeKeySets.length > 0);
    148     }
    149 }
    150