1 /* 2 * Copyright (C) 2008 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 android.content.pm; 18 19 import android.os.Parcel; 20 import android.os.Parcelable; 21 import android.text.TextUtils; 22 23 /** 24 * Information you can retrieve about a particular security permission 25 * known to the system. This corresponds to information collected from the 26 * AndroidManifest.xml's <permission> tags. 27 */ 28 public class PermissionInfo extends PackageItemInfo implements Parcelable { 29 /** 30 * A normal application value for {@link #protectionLevel}, corresponding 31 * to the <code>normal</code> value of 32 * {@link android.R.attr#protectionLevel}. 33 */ 34 public static final int PROTECTION_NORMAL = 0; 35 36 /** 37 * Dangerous value for {@link #protectionLevel}, corresponding 38 * to the <code>dangerous</code> value of 39 * {@link android.R.attr#protectionLevel}. 40 */ 41 public static final int PROTECTION_DANGEROUS = 1; 42 43 /** 44 * System-level value for {@link #protectionLevel}, corresponding 45 * to the <code>signature</code> value of 46 * {@link android.R.attr#protectionLevel}. 47 */ 48 public static final int PROTECTION_SIGNATURE = 2; 49 50 /** 51 * System-level value for {@link #protectionLevel}, corresponding 52 * to the <code>signatureOrSystem</code> value of 53 * {@link android.R.attr#protectionLevel}. 54 */ 55 public static final int PROTECTION_SIGNATURE_OR_SYSTEM = 3; 56 57 /** 58 * Additional flag for {@link #protectionLevel}, corresponding 59 * to the <code>system</code> value of 60 * {@link android.R.attr#protectionLevel}. 61 */ 62 public static final int PROTECTION_FLAG_SYSTEM = 0x10; 63 64 /** 65 * Additional flag for {@link #protectionLevel}, corresponding 66 * to the <code>development</code> value of 67 * {@link android.R.attr#protectionLevel}. 68 */ 69 public static final int PROTECTION_FLAG_DEVELOPMENT = 0x20; 70 71 /** 72 * Additional flag for {@link #protectionLevel}, corresponding 73 * to the <code>appop</code> value of 74 * {@link android.R.attr#protectionLevel}. 75 */ 76 public static final int PROTECTION_FLAG_APPOP = 0x40; 77 78 /** 79 * Mask for {@link #protectionLevel}: the basic protection type. 80 */ 81 public static final int PROTECTION_MASK_BASE = 0xf; 82 83 /** 84 * Mask for {@link #protectionLevel}: additional flag bits. 85 */ 86 public static final int PROTECTION_MASK_FLAGS = 0xf0; 87 88 /** 89 * The level of access this permission is protecting, as per 90 * {@link android.R.attr#protectionLevel}. Values may be 91 * {@link #PROTECTION_NORMAL}, {@link #PROTECTION_DANGEROUS}, or 92 * {@link #PROTECTION_SIGNATURE}. May also include the additional 93 * flags {@link #PROTECTION_FLAG_SYSTEM} or {@link #PROTECTION_FLAG_DEVELOPMENT} 94 * (which only make sense in combination with the base 95 * {@link #PROTECTION_SIGNATURE}. 96 */ 97 public int protectionLevel; 98 99 /** 100 * The group this permission is a part of, as per 101 * {@link android.R.attr#permissionGroup}. 102 */ 103 public String group; 104 105 /** 106 * Flag for {@link #flags}, corresponding to <code>costsMoney</code> 107 * value of {@link android.R.attr#permissionFlags}. 108 */ 109 public static final int FLAG_COSTS_MONEY = 1<<0; 110 111 /** 112 * Additional flags about this permission as given by 113 * {@link android.R.attr#permissionFlags}. 114 */ 115 public int flags; 116 117 /** 118 * A string resource identifier (in the package's resources) of this 119 * permission's description. From the "description" attribute or, 120 * if not set, 0. 121 */ 122 public int descriptionRes; 123 124 /** 125 * The description string provided in the AndroidManifest file, if any. You 126 * probably don't want to use this, since it will be null if the description 127 * is in a resource. You probably want 128 * {@link PermissionInfo#loadDescription} instead. 129 */ 130 public CharSequence nonLocalizedDescription; 131 132 /** @hide */ 133 public static int fixProtectionLevel(int level) { 134 if (level == PROTECTION_SIGNATURE_OR_SYSTEM) { 135 level = PROTECTION_SIGNATURE | PROTECTION_FLAG_SYSTEM; 136 } 137 return level; 138 } 139 140 /** @hide */ 141 public static String protectionToString(int level) { 142 String protLevel = "????"; 143 switch (level&PROTECTION_MASK_BASE) { 144 case PermissionInfo.PROTECTION_DANGEROUS: 145 protLevel = "dangerous"; 146 break; 147 case PermissionInfo.PROTECTION_NORMAL: 148 protLevel = "normal"; 149 break; 150 case PermissionInfo.PROTECTION_SIGNATURE: 151 protLevel = "signature"; 152 break; 153 case PermissionInfo.PROTECTION_SIGNATURE_OR_SYSTEM: 154 protLevel = "signatureOrSystem"; 155 break; 156 } 157 if ((level&PermissionInfo.PROTECTION_FLAG_SYSTEM) != 0) { 158 protLevel += "|system"; 159 } 160 if ((level&PermissionInfo.PROTECTION_FLAG_DEVELOPMENT) != 0) { 161 protLevel += "|development"; 162 } 163 if ((level&PermissionInfo.PROTECTION_FLAG_APPOP) != 0) { 164 protLevel += "|appop"; 165 } 166 return protLevel; 167 } 168 169 public PermissionInfo() { 170 } 171 172 public PermissionInfo(PermissionInfo orig) { 173 super(orig); 174 protectionLevel = orig.protectionLevel; 175 flags = orig.flags; 176 group = orig.group; 177 descriptionRes = orig.descriptionRes; 178 nonLocalizedDescription = orig.nonLocalizedDescription; 179 } 180 181 /** 182 * Retrieve the textual description of this permission. This 183 * will call back on the given PackageManager to load the description from 184 * the application. 185 * 186 * @param pm A PackageManager from which the label can be loaded; usually 187 * the PackageManager from which you originally retrieved this item. 188 * 189 * @return Returns a CharSequence containing the permission's description. 190 * If there is no description, null is returned. 191 */ 192 public CharSequence loadDescription(PackageManager pm) { 193 if (nonLocalizedDescription != null) { 194 return nonLocalizedDescription; 195 } 196 if (descriptionRes != 0) { 197 CharSequence label = pm.getText(packageName, descriptionRes, null); 198 if (label != null) { 199 return label; 200 } 201 } 202 return null; 203 } 204 205 public String toString() { 206 return "PermissionInfo{" 207 + Integer.toHexString(System.identityHashCode(this)) 208 + " " + name + "}"; 209 } 210 211 public int describeContents() { 212 return 0; 213 } 214 215 public void writeToParcel(Parcel dest, int parcelableFlags) { 216 super.writeToParcel(dest, parcelableFlags); 217 dest.writeInt(protectionLevel); 218 dest.writeInt(flags); 219 dest.writeString(group); 220 dest.writeInt(descriptionRes); 221 TextUtils.writeToParcel(nonLocalizedDescription, dest, parcelableFlags); 222 } 223 224 public static final Creator<PermissionInfo> CREATOR = 225 new Creator<PermissionInfo>() { 226 public PermissionInfo createFromParcel(Parcel source) { 227 return new PermissionInfo(source); 228 } 229 public PermissionInfo[] newArray(int size) { 230 return new PermissionInfo[size]; 231 } 232 }; 233 234 private PermissionInfo(Parcel source) { 235 super(source); 236 protectionLevel = source.readInt(); 237 flags = source.readInt(); 238 group = source.readString(); 239 descriptionRes = source.readInt(); 240 nonLocalizedDescription = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 241 } 242 } 243
