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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.content.pm.PackageManager;
/**
* 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);
}
/** Determine if the calling process has full read access to all voicemails. */
public boolean callerHasFullReadAccess() {
return callerHasPermission(android.Manifest.permission.READ_ALL_VOICEMAIL);
}
/** Determines if the calling process has access to all voicemails. */
public boolean callerHasFullAccess() {
return callerHasOwnVoicemailAccess() &&
callerHasPermission(Manifest.permission.READ_WRITE_ALL_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);
}
}
/**
* Checks that the caller has permissions to read ALL voicemails.
*
* @throws SecurityException if the caller does not have the voicemail source permission.
*/
public void checkCallerHasFullReadAccess() {
if (!callerHasFullReadAccess()) {
throw new SecurityException(String.format("The caller must have %s permission: ",
android.Manifest.permission.READ_ALL_VOICEMAIL));
}
}
/**
* Checks that the caller has permissions to access ALL voicemails.
*
* @throws SecurityException if the caller does not have the voicemail source permission.
*/
public void checkCallerHasFullAccess() {
if (!callerHasFullAccess()) {
throw new SecurityException(String.format("The caller must have permissions %s AND %s",
android.Manifest.permission.ADD_VOICEMAIL,
Manifest.permission.READ_WRITE_ALL_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);
}
/** Determines if the given package has read full access. */
public boolean packageHasFullReadAccess(String packageName) {
return packageHasPermission(packageName, android.Manifest.permission.READ_ALL_VOICEMAIL);
}
/** Determines if the given package has full access. */
public boolean packageHasFullAccess(String packageName) {
return packageHasOwnVoicemailAccess(packageName) &&
packageHasPermission(packageName, Manifest.permission.READ_WRITE_ALL_VOICEMAIL);
}
/** Determines if the given package has the given permission. */
private boolean packageHasPermission(String packageName, String permission) {
return mContext.getPackageManager().checkPermission(permission, packageName)
== PackageManager.PERMISSION_GRANTED;
}
/** Determines if the calling process has the given permission. */
private boolean callerHasPermission(String permission) {
// We need to check against both the calling or self permission in order for the Contacts
// app to be allowed access.
// The reason is that the Contacts app shares its process with the ContactsProvider and
// therefore its requests are not considered to be IPCs, since they are coming from the same
// process, even if, technically, from a different package.
return mContext.checkCallingOrSelfPermission(permission)
== PackageManager.PERMISSION_GRANTED;
}
}
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