rpcraig | 554cb0c | 2012-07-05 06:41:43 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 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 | |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 17 | package android.os; |
| 18 | |
rpcraig | 554cb0c | 2012-07-05 06:41:43 -0400 | [diff] [blame] | 19 | import android.util.Slog; |
| 20 | |
| 21 | import java.io.IOException; |
| 22 | import java.io.File; |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 23 | import java.io.FileDescriptor; |
| 24 | |
| 25 | /** |
| 26 | * This class provides access to the centralized jni bindings for |
| 27 | * SELinux interaction. |
| 28 | * {@hide} |
| 29 | */ |
| 30 | public class SELinux { |
| 31 | |
rpcraig | 554cb0c | 2012-07-05 06:41:43 -0400 | [diff] [blame] | 32 | private static final String TAG = "SELinux"; |
| 33 | |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 34 | /** |
| 35 | * Determine whether SELinux is disabled or enabled. |
| 36 | * @return a boolean indicating whether SELinux is enabled. |
| 37 | */ |
| 38 | public static final native boolean isSELinuxEnabled(); |
| 39 | |
| 40 | /** |
| 41 | * Determine whether SELinux is permissive or enforcing. |
| 42 | * @return a boolean indicating whether SELinux is enforcing. |
| 43 | */ |
| 44 | public static final native boolean isSELinuxEnforced(); |
| 45 | |
| 46 | /** |
| 47 | * Set whether SELinux is permissive or enforcing. |
Richard Haines | 66d5369 | 2013-05-22 13:25:15 +0100 | [diff] [blame] | 48 | * @param value representing whether to set SELinux to enforcing |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 49 | * @return a boolean representing whether the desired mode was set |
| 50 | */ |
| 51 | public static final native boolean setSELinuxEnforce(boolean value); |
| 52 | |
| 53 | /** |
| 54 | * Sets the security context for newly created file objects. |
| 55 | * @param context a security context given as a String. |
| 56 | * @return a boolean indicating whether the operation succeeded. |
| 57 | */ |
| 58 | public static final native boolean setFSCreateContext(String context); |
| 59 | |
| 60 | /** |
| 61 | * Change the security context of an existing file object. |
| 62 | * @param path representing the path of file object to relabel. |
Richard Haines | 66d5369 | 2013-05-22 13:25:15 +0100 | [diff] [blame] | 63 | * @param context new security context given as a String. |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 64 | * @return a boolean indicating whether the operation succeeded. |
| 65 | */ |
| 66 | public static final native boolean setFileContext(String path, String context); |
| 67 | |
| 68 | /** |
| 69 | * Get the security context of a file object. |
| 70 | * @param path the pathname of the file object. |
| 71 | * @return a security context given as a String. |
| 72 | */ |
| 73 | public static final native String getFileContext(String path); |
| 74 | |
| 75 | /** |
| 76 | * Get the security context of a peer socket. |
| 77 | * @param fd FileDescriptor class of the peer socket. |
| 78 | * @return a String representing the peer socket security context. |
| 79 | */ |
| 80 | public static final native String getPeerContext(FileDescriptor fd); |
| 81 | |
| 82 | /** |
| 83 | * Gets the security context of the current process. |
| 84 | * @return a String representing the security context of the current process. |
| 85 | */ |
| 86 | public static final native String getContext(); |
| 87 | |
| 88 | /** |
| 89 | * Gets the security context of a given process id. |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 90 | * @param pid an int representing the process id to check. |
| 91 | * @return a String representing the security context of the given pid. |
| 92 | */ |
| 93 | public static final native String getPidContext(int pid); |
| 94 | |
| 95 | /** |
| 96 | * Gets a list of the SELinux boolean names. |
| 97 | * @return an array of strings containing the SELinux boolean names. |
| 98 | */ |
| 99 | public static final native String[] getBooleanNames(); |
| 100 | |
| 101 | /** |
| 102 | * Gets the value for the given SELinux boolean name. |
Richard Haines | 66d5369 | 2013-05-22 13:25:15 +0100 | [diff] [blame] | 103 | * @param name The name of the SELinux boolean. |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 104 | * @return a boolean indicating whether the SELinux boolean is set. |
| 105 | */ |
| 106 | public static final native boolean getBooleanValue(String name); |
| 107 | |
| 108 | /** |
| 109 | * Sets the value for the given SELinux boolean name. |
Richard Haines | 66d5369 | 2013-05-22 13:25:15 +0100 | [diff] [blame] | 110 | * @param name The name of the SELinux boolean. |
| 111 | * @param value The new value of the SELinux boolean. |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 112 | * @return a boolean indicating whether or not the operation succeeded. |
| 113 | */ |
| 114 | public static final native boolean setBooleanValue(String name, boolean value); |
| 115 | |
| 116 | /** |
| 117 | * Check permissions between two security contexts. |
| 118 | * @param scon The source or subject security context. |
| 119 | * @param tcon The target or object security context. |
| 120 | * @param tclass The object security class name. |
| 121 | * @param perm The permission name. |
| 122 | * @return a boolean indicating whether permission was granted. |
| 123 | */ |
| 124 | public static final native boolean checkSELinuxAccess(String scon, String tcon, String tclass, String perm); |
rpcraig | 554cb0c | 2012-07-05 06:41:43 -0400 | [diff] [blame] | 125 | |
| 126 | /** |
| 127 | * Restores a file to its default SELinux security context. |
| 128 | * If the system is not compiled with SELinux, then {@code true} |
| 129 | * is automatically returned. |
| 130 | * If SELinux is compiled in, but disabled, then {@code true} is |
| 131 | * returned. |
| 132 | * |
| 133 | * @param pathname The pathname of the file to be relabeled. |
| 134 | * @return a boolean indicating whether the relabeling succeeded. |
| 135 | * @exception NullPointerException if the pathname is a null object. |
| 136 | */ |
| 137 | public static boolean restorecon(String pathname) throws NullPointerException { |
| 138 | if (pathname == null) { throw new NullPointerException(); } |
| 139 | return native_restorecon(pathname); |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * Restores a file to its default SELinux security context. |
| 144 | * If the system is not compiled with SELinux, then {@code true} |
| 145 | * is automatically returned. |
| 146 | * If SELinux is compiled in, but disabled, then {@code true} is |
| 147 | * returned. |
| 148 | * |
| 149 | * @param pathname The pathname of the file to be relabeled. |
| 150 | * @return a boolean indicating whether the relabeling succeeded. |
| 151 | */ |
| 152 | private static native boolean native_restorecon(String pathname); |
| 153 | |
| 154 | /** |
| 155 | * Restores a file to its default SELinux security context. |
| 156 | * If the system is not compiled with SELinux, then {@code true} |
| 157 | * is automatically returned. |
| 158 | * If SELinux is compiled in, but disabled, then {@code true} is |
| 159 | * returned. |
| 160 | * |
| 161 | * @param file The File object representing the path to be relabeled. |
| 162 | * @return a boolean indicating whether the relabeling succeeded. |
| 163 | * @exception NullPointerException if the file is a null object. |
| 164 | */ |
| 165 | public static boolean restorecon(File file) throws NullPointerException { |
| 166 | try { |
| 167 | return native_restorecon(file.getCanonicalPath()); |
| 168 | } catch (IOException e) { |
| 169 | Slog.e(TAG, "Error getting canonical path. Restorecon failed for " + |
| 170 | file.getPath(), e); |
| 171 | return false; |
| 172 | } |
| 173 | } |
Stephen Smalley | c07fca3 | 2012-01-13 08:31:39 -0500 | [diff] [blame] | 174 | } |