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cmsdk: add invalid input checking for persistent storage APIs

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Some of this exists in the PersistentStorage implementation, but it
was never formally documented in the APIs.  Inherit the cmhw implementation
error checking & move it into the service.

Add tests to validate the new restrictions & a test that was previously
failing.

Change-Id: I3ecda29fdd28bbc4e6d8ccce7511c4644065ea46
This commit is contained in:
Scott Mertz 2016-01-22 14:36:19 -08:00 committed by Adnan Begovic
parent fc50f7cef8
commit 62579b157a
3 changed files with 92 additions and 8 deletions
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14
cm/lib/main/java/org/cyanogenmod/platform/internal/CMHardwareService.java
View File

@ -32,6 +32,7 @@ import cyanogenmod.hardware.IThermalListenerCallback;
import cyanogenmod.hardware.ThermalListenerCallback;
import java.io.File;
import java.util.Arrays;
import org.cyanogenmod.hardware.AdaptiveBacklight;
import org.cyanogenmod.hardware.AutoContrast;
@ -592,6 +593,15 @@ public class CMHardwareService extends SystemService implements ThermalUpdateCal
public boolean writePersistentBytes(String key, byte[] value) {
mContext.enforceCallingOrSelfPermission(
cyanogenmod.platform.Manifest.permission.MANAGE_PERSISTENT_STORAGE, null);
if (key == null || key.length() == 0 || key.length() > 64) {
Log.e(TAG, "Invalid key: " + key);
return false;
}
// A null value is delete
if (value != null && (value.length > 4096 || value.length == 0)) {
Log.e(TAG, "Invalid value: " + (value != null ? Arrays.toString(value) : null));
return false;
}
if (!isSupported(CMHardwareManager.FEATURE_PERSISTENT_STORAGE)) {
Log.e(TAG, "Persistent storage is not supported");
return false;
@ -603,6 +613,10 @@ public class CMHardwareService extends SystemService implements ThermalUpdateCal
public byte[] readPersistentBytes(String key) {
mContext.enforceCallingOrSelfPermission(
cyanogenmod.platform.Manifest.permission.MANAGE_PERSISTENT_STORAGE, null);
if (key == null || key.length() == 0 || key.length() > 64) {
Log.e(TAG, "Invalid key: " + key);
return null;
}
if (!isSupported(CMHardwareManager.FEATURE_PERSISTENT_STORAGE)) {
Log.e(TAG, "Persistent storage is not supported");
return null;

16
src/java/cyanogenmod/hardware/CMHardwareManager.java
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@ -428,8 +428,8 @@ public final class CMHardwareManager {
/**
* Write a string to persistent storage, which persists thru factory reset
*
* @param key String identifier for this item
* @param value The UTF-8 encoded string to store
* @param key String identifier for this item. Must not exceed 64 characters.
* @param value The UTF-8 encoded string to store of at least 1 character. null deletes the key/value pair.
* @return true on success
*/
public boolean writePersistentString(String key, String value) {
@ -448,7 +448,7 @@ public final class CMHardwareManager {
/**
* Write an integer to persistent storage, which persists thru factory reset
*
* @param key String identifier for this item
* @param key String identifier for this item. Must not exceed 64 characters.
* @param value The integer to store
* @return true on success
*/
@ -466,8 +466,8 @@ public final class CMHardwareManager {
/**
* Write a byte array to persistent storage, which persists thru factory reset
*
* @param key String identifier for this item
* @param value The byte array to store, up to 4096 bytes
* @param key String identifier for this item. Must not exceed 64 characters.
* @param value The byte array to store, must be 1-4096 bytes. null deletes the key/value pair.
* @return true on success
*/
public boolean writePersistentBytes(String key, byte[] value) {
@ -483,7 +483,7 @@ public final class CMHardwareManager {
/**
* Read a string from persistent storage
*
* @param key String identifier for this item
* @param key String identifier for this item. Must not exceed 64 characters.
* @return the stored UTF-8 encoded string, null if not found
*/
public String readPersistentString(String key) {
@ -504,7 +504,7 @@ public final class CMHardwareManager {
/**
* Read an integer from persistent storage
*
* @param key String identifier for this item
* @param key String identifier for this item. Must not exceed 64 characters.
* @return the stored integer, zero if not found
*/
public int readPersistentInt(String key) {
@ -523,7 +523,7 @@ public final class CMHardwareManager {
/**
* Read a byte array from persistent storage
*
* @param key String identifier for this item
* @param key String identifier for this item. Must not exceed 64 characters.
* @return the stored byte array, null if not found
*/
public byte[] readPersistentBytes(String key) {

70
tests/src/org/cyanogenmod/tests/hardware/unit/PersistentStorageTest.java
View File

@ -34,6 +34,58 @@ public class PersistentStorageTest extends AndroidTestCase {
mHardwareManager = CMHardwareManager.getInstance(mContext);
}
@SmallTest
public void testUdidFailure() {
String key = "udid";
String value = "542bc67e510e82bd6d44e4f7015d7970";
assertTrue(mHardwareManager.writePersistentString(key, value));
}
@SmallTest
public void testPersistentStringInvalidInput() {
String testKey = UUID.randomUUID().toString();
String testString = "IM IN UR STORAGE";
String testKeyTooLong = getStringOfLength(65);
String testStringTooLong = getStringOfLength(4097);
assertFalse(mHardwareManager.writePersistentString(null, testString));
assertFalse(mHardwareManager.writePersistentString("", testString));
assertFalse(mHardwareManager.writePersistentString(testKeyTooLong, testString));
assertFalse(mHardwareManager.writePersistentString(testKey, testStringTooLong));
assertFalse(mHardwareManager.writePersistentString(testKey, ""));
assertNull(mHardwareManager.readPersistentString(testKey));
assertNull(mHardwareManager.readPersistentString(testKeyTooLong));
}
@SmallTest
public void testPersistentIntInvalidInput() {
String testKey = UUID.randomUUID().toString();
String testString = "IM IN UR STORAGE";
String testKeyTooLong = getStringOfLength(65);
assertFalse(mHardwareManager.writePersistentInt(null, 49152));
assertFalse(mHardwareManager.writePersistentInt("", 49152));
assertFalse(mHardwareManager.writePersistentInt(testKeyTooLong, 49152));
assertEquals(0, mHardwareManager.readPersistentInt(testKey));
assertEquals(0, mHardwareManager.readPersistentInt(testKeyTooLong));
}
@SmallTest
public void testPersistentBytesInvalidInput() {
String testKey = UUID.randomUUID().toString();
byte[] testArray = new byte[1024];
byte[] testArrayTooLong = new byte[4097];
String testKeyTooLong = getStringOfLength(65);
assertFalse(mHardwareManager.writePersistentBytes(null, testArray));
assertFalse(mHardwareManager.writePersistentBytes("", testArray));
assertFalse(mHardwareManager.writePersistentBytes(testKeyTooLong, testArray));
assertFalse(mHardwareManager.writePersistentBytes(testKey, testArrayTooLong));
assertFalse(mHardwareManager.writePersistentBytes(testKey, new byte[0]));
assertNull(mHardwareManager.readPersistentBytes(testKey));
assertNull(mHardwareManager.readPersistentBytes(testKeyTooLong));
}
@SmallTest
public void testPersistentString() {
assertTrue(mHardwareManager.isSupported(CMHardwareManager.FEATURE_PERSISTENT_STORAGE));
@ -52,6 +104,12 @@ public class PersistentStorageTest extends AndroidTestCase {
// erase + read
assertTrue(mHardwareManager.deletePersistentObject(testKey));
assertNull(mHardwareManager.readPersistentString(testKey));
// erase through write null
assertTrue(mHardwareManager.writePersistentString(testKey, testString + " AGAIN"));
assertEquals(testString + " AGAIN", mHardwareManager.readPersistentString(testKey));
assertTrue(mHardwareManager.writePersistentString(testKey, null));
assertNull(mHardwareManager.readPersistentString(testKey));
}
@SmallTest
@ -96,5 +154,17 @@ public class PersistentStorageTest extends AndroidTestCase {
// erase + read
assertTrue(mHardwareManager.deletePersistentObject(testKey));
assertNull(mHardwareManager.readPersistentBytes(testKey));
// erase through write null
assertTrue(mHardwareManager.writePersistentBytes(testKey, testArray));
assertTrue(Arrays.equals(testArray, mHardwareManager.readPersistentBytes(testKey)));
assertTrue(mHardwareManager.writePersistentBytes(testKey, null));
assertNull(mHardwareManager.readPersistentBytes(testKey));
}
private String getStringOfLength(int length) {
char[] chars = new char[length];
Arrays.fill(chars, 'z');
return new String(chars);
}
}