/* 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.emailcommon.service;
import com.android.emailcommon.provider.Policy;
/**
* Legacy class for policy storage as a bit field of flags
*/
public class LegacyPolicySet {
// Security (provisioning) flags
// bits 0..4: password length (0=no password required)
public static final int PASSWORD_LENGTH_MASK = 31;
public static final int PASSWORD_LENGTH_SHIFT = 0;
public static final int PASSWORD_LENGTH_MAX = 30;
// bits 5..8: password mode
public static final int PASSWORD_MODE_SHIFT = 5;
public static final int PASSWORD_MODE_MASK = 15 << PASSWORD_MODE_SHIFT;
public static final int PASSWORD_MODE_NONE = 0 << PASSWORD_MODE_SHIFT;
public static final int PASSWORD_MODE_SIMPLE = 1 << PASSWORD_MODE_SHIFT;
public static final int PASSWORD_MODE_STRONG = 2 << PASSWORD_MODE_SHIFT;
// bits 9..13: password failures -> wipe device (0=disabled)
public static final int PASSWORD_MAX_FAILS_SHIFT = 9;
public static final int PASSWORD_MAX_FAILS_MASK = 31 << PASSWORD_MAX_FAILS_SHIFT;
public static final int PASSWORD_MAX_FAILS_MAX = 31;
// bits 14..24: seconds to screen lock (0=not required)
public static final int SCREEN_LOCK_TIME_SHIFT = 14;
public static final int SCREEN_LOCK_TIME_MASK = 2047 << SCREEN_LOCK_TIME_SHIFT;
public static final int SCREEN_LOCK_TIME_MAX = 2047;
// bit 25: remote wipe capability required
public static final int REQUIRE_REMOTE_WIPE = 1 << 25;
// bit 26..35: password expiration (days; 0=not required)
public static final int PASSWORD_EXPIRATION_SHIFT = 26;
public static final long PASSWORD_EXPIRATION_MASK = 1023L << PASSWORD_EXPIRATION_SHIFT;
public static final int PASSWORD_EXPIRATION_MAX = 1023;
// bit 36..43: password history (length; 0=not required)
public static final int PASSWORD_HISTORY_SHIFT = 36;
public static final long PASSWORD_HISTORY_MASK = 255L << PASSWORD_HISTORY_SHIFT;
public static final int PASSWORD_HISTORY_MAX = 255;
// bit 44..48: min complex characters (0=not required)
public static final int PASSWORD_COMPLEX_CHARS_SHIFT = 44;
public static final long PASSWORD_COMPLEX_CHARS_MASK = 31L << PASSWORD_COMPLEX_CHARS_SHIFT;
public static final int PASSWORD_COMPLEX_CHARS_MAX = 31;
// bit 49: requires device encryption (internal)
public static final long REQUIRE_ENCRYPTION = 1L << 49;
// bit 50: requires external storage encryption
public static final long REQUIRE_ENCRYPTION_EXTERNAL = 1L << 50;
/**
* Convert legacy policy flags to a Policy
* @param flags legacy policy flags
* @return a Policy representing the legacy policy flag
*/
public static Policy flagsToPolicy(long flags) {
Policy policy = new Policy();
policy.mPasswordMode = ((int) (flags & PASSWORD_MODE_MASK)) >> PASSWORD_MODE_SHIFT;
policy.mPasswordMinLength = (int) ((flags & PASSWORD_LENGTH_MASK) >> PASSWORD_LENGTH_SHIFT);
policy.mPasswordMaxFails =
(int) ((flags & PASSWORD_MAX_FAILS_MASK) >> PASSWORD_MAX_FAILS_SHIFT);
policy.mPasswordComplexChars =
(int) ((flags & PASSWORD_COMPLEX_CHARS_MASK) >> PASSWORD_COMPLEX_CHARS_SHIFT);
policy.mPasswordHistory = (int) ((flags & PASSWORD_HISTORY_MASK) >> PASSWORD_HISTORY_SHIFT);
policy.mPasswordExpirationDays =
(int) ((flags & PASSWORD_EXPIRATION_MASK) >> PASSWORD_EXPIRATION_SHIFT);
policy.mMaxScreenLockTime =
(int) ((flags & SCREEN_LOCK_TIME_MASK) >> SCREEN_LOCK_TIME_SHIFT);
policy.mRequireRemoteWipe = 0 != (flags & REQUIRE_REMOTE_WIPE);
policy.mRequireEncryption = 0 != (flags & REQUIRE_ENCRYPTION);
policy.mRequireEncryptionExternal = 0 != (flags & REQUIRE_ENCRYPTION_EXTERNAL);
return policy;
}
}