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/*
* 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.providers.contacts;
import android.content.Context;
import android.os.Binder;
import android.telecom.DefaultDialerManager;
import android.telephony.TelephonyManager;
import com.android.providers.contacts.util.ContactsPermissions;
/**
* Provides method related to check various voicemail permissions under the
* specified context.
* <p> This is an immutable object.
*/
public class VoicemailPermissions {
private final Context mContext;
public VoicemailPermissions(Context context) {
mContext = context;
}
/** Determines if the calling process has access to its own voicemails. */
public boolean callerHasOwnVoicemailAccess() {
return callerHasPermission(android.Manifest.permission.ADD_VOICEMAIL)
|| callerHasCarrierPrivileges();
}
/** Determine if the calling process has full read access to all voicemails. */
public boolean callerHasReadAccess(String callingPackage) {
if (DefaultDialerManager.isDefaultOrSystemDialer(mContext, callingPackage)) {
return true;
}
return callerHasPermission(android.Manifest.permission.READ_VOICEMAIL);
}
/** Determine if the calling process has the permission required to update and remove all
* voicemails */
public boolean callerHasWriteAccess(String callingPackage) {
if (DefaultDialerManager.isDefaultOrSystemDialer(mContext, callingPackage)) {
return true;
}
return callerHasPermission(android.Manifest.permission.WRITE_VOICEMAIL);
}
/**
* Checks that the caller has permissions to access its own voicemails.
*
* @throws SecurityException if the caller does not have the voicemail source permission.
*/
public void checkCallerHasOwnVoicemailAccess() {
if (!callerHasOwnVoicemailAccess()) {
throw new SecurityException("The caller must have permission: " +
android.Manifest.permission.ADD_VOICEMAIL + " or carrier privileges");
}
}
/**
* Checks that the caller has permissions to read ALL voicemails.
*
* @throws SecurityException if the caller does not have the voicemail source permission.
*/
public void checkCallerHasReadAccess(String callingPackage) {
if (!callerHasReadAccess(callingPackage)) {
throw new SecurityException(String.format("The caller must be the default or system "
+ "dialer, or have the system-only %s permission: ",
android.Manifest.permission.READ_VOICEMAIL));
}
}
public void checkCallerHasWriteAccess(String callingPackage) {
if (!callerHasWriteAccess(callingPackage)) {
throw new SecurityException(String.format("The caller must be the default or system "
+ "dialer, or have the system-only %s permission: ",
android.Manifest.permission.WRITE_VOICEMAIL));
}
}
/** Determines if the given package has access to its own voicemails. */
public boolean packageHasOwnVoicemailAccess(String packageName) {
return packageHasPermission(packageName,
android.Manifest.permission.ADD_VOICEMAIL)
|| packageHasCarrierPrivileges(packageName);
}
/** Determines if the given package has read access. */
public boolean packageHasReadAccess(String packageName) {
return packageHasPermission(packageName, android.Manifest.permission.READ_VOICEMAIL);
}
/** Determines if the given package has write access. */
public boolean packageHasWriteAccess(String packageName) {
return packageHasPermission(packageName, android.Manifest.permission.WRITE_VOICEMAIL);
}
/** Determines if the given package has the given permission. */
private boolean packageHasPermission(String packageName, String permission) {
return ContactsPermissions.hasPackagePermission(mContext, permission, packageName);
}
/** Determines if the calling process has the given permission. */
private boolean callerHasPermission(String permission) {
return ContactsPermissions.hasCallerOrSelfPermission(mContext, permission);
}
/** Determines if the calling process has carrier privileges. */
public boolean callerHasCarrierPrivileges() {
TelephonyManager tm =
(TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
String[] packages = mContext.getPackageManager().getPackagesForUid(Binder.getCallingUid());
for (String packageName : packages) {
if (tm.checkCarrierPrivilegesForPackageAnyPhone(packageName)
== TelephonyManager.CARRIER_PRIVILEGE_STATUS_HAS_ACCESS) {
return true;
}
}
return false;
}
/** Determines if the given package has carrier privileges. */
private boolean packageHasCarrierPrivileges(String packageName) {
TelephonyManager tm =
(TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
return tm.getPackagesWithCarrierPrivileges().contains(packageName);
}
}
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