Merge "Check permission on clearPassword and other CryptKeeper APIs" into nyc-dev

am: 1658fff3a9

* commit '1658fff3a92ce6ad13f41ce5faf7fcdfe3ca2673':
  Check permission on clearPassword and other CryptKeeper APIs

Change-Id: I03145596adfd67f016119408c95c6ba5f8f6b271

services/core/java/com/android/server/LockSettingsService.java

@@ -1281,8 +1281,14 @@ public class LockSettingsService extends ILockSettings.Stub {
         // service can't connect to vold, it restarts, and then the new instance
         // does successfully connect.
         final IMountService service = getMountService();
-        String password = service.getPassword();
+        String password;
-        service.clearPassword();
+        long identity = Binder.clearCallingIdentity();
+        try {
+            password = service.getPassword();
+            service.clearPassword();
+        } finally {
+            Binder.restoreCallingIdentity(identity);
+        }
         if (password == null) {
             return false;
         }

services/core/java/com/android/server/MountService.java

@@ -2648,6 +2648,8 @@ class MountService extends IMountService.Stub
      */
     @Override
     public int getPasswordType() {
+        mContext.enforceCallingOrSelfPermission(Manifest.permission.STORAGE_INTERNAL,
+            "no permission to access the crypt keeper");
 
         waitForReady();
 
@@ -2672,6 +2674,8 @@ class MountService extends IMountService.Stub
      */
     @Override
     public void setField(String field, String contents) throws RemoteException {
+        mContext.enforceCallingOrSelfPermission(Manifest.permission.STORAGE_INTERNAL,
+            "no permission to access the crypt keeper");
 
         waitForReady();
 
@@ -2690,6 +2694,8 @@ class MountService extends IMountService.Stub
      */
     @Override
     public String getField(String field) throws RemoteException {
+        mContext.enforceCallingOrSelfPermission(Manifest.permission.STORAGE_INTERNAL,
+            "no permission to access the crypt keeper");
 
         waitForReady();
 
@@ -2714,6 +2720,8 @@ class MountService extends IMountService.Stub
      */
     @Override
     public boolean isConvertibleToFBE() throws RemoteException {
+        mContext.enforceCallingOrSelfPermission(Manifest.permission.STORAGE_INTERNAL,
+            "no permission to access the crypt keeper");
 
         waitForReady();
 
@@ -2728,8 +2736,9 @@ class MountService extends IMountService.Stub
 
     @Override
     public String getPassword() throws RemoteException {
-        mContext.enforceCallingOrSelfPermission(Manifest.permission.ACCESS_KEYGUARD_SECURE_STORAGE,
+        mContext.enforceCallingOrSelfPermission(Manifest.permission.STORAGE_INTERNAL,
                 "only keyguard can retrieve password");
+
         if (!isReady()) {
             return new String();
         }
@@ -2752,6 +2761,9 @@ class MountService extends IMountService.Stub
 
     @Override
     public void clearPassword() throws RemoteException {
+        mContext.enforceCallingOrSelfPermission(Manifest.permission.STORAGE_INTERNAL,
+                "only keyguard can clear password");
+
         if (!isReady()) {
             return;
         }