Remove non-SP based setLockCredentialInternal()

This code is no longer used, since the migration to synthetic passwords
is always enabled.

Test: atest com.android.server.locksettings
Bug: 184723544
Change-Id: Ieefffb2641f5c12dfcd7556f529830328e8ba292

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

@@ -1762,42 +1762,10 @@ public class LockSettingsService extends ILockSettings.Stub {
             }
         }
         synchronized (mSpManager) {
-            if (shouldMigrateToSyntheticPasswordLocked(userId)) {
+            initializeSyntheticPasswordLocked(currentHandle.hash, savedCredential, userId);
-                initializeSyntheticPasswordLocked(currentHandle.hash, savedCredential, userId);
+            return spBasedSetLockCredentialInternalLocked(credential, savedCredential, userId,
-                return spBasedSetLockCredentialInternalLocked(credential, savedCredential, userId,
+                    isLockTiedToParent);
-                        isLockTiedToParent);
-            }
         }
-        if (DEBUG) Slog.d(TAG, "setLockCredentialInternal: user=" + userId);
-        byte[] enrolledHandle = enrollCredential(currentHandle.hash,
-                savedCredential.getCredential(), credential.getCredential(), userId);
-        if (enrolledHandle == null) {
-            Slog.w(TAG, String.format("Failed to enroll %s: incorrect credential",
-                    credential.isPattern() ? "pattern" : "password"));
-            return false;
-        }
-        CredentialHash willStore = CredentialHash.create(enrolledHandle, credential.getType());
-        mStorage.writeCredentialHash(willStore, userId);
-        // Still update PASSWORD_TYPE_KEY if we are running in pre-synthetic password code path,
-        // since it forms part of the state that determines the credential type
-        // @see getCredentialTypeInternal
-        setKeyguardStoredQuality(
-                LockPatternUtils.credentialTypeToPasswordQuality(credential.getType()), userId);
-        // push new secret and auth token to vold
-        GateKeeperResponse gkResponse;
-        try {
-            gkResponse = getGateKeeperService().verifyChallenge(userId, 0, willStore.hash,
-                    credential.getCredential());
-        } catch (RemoteException e) {
-            throw new IllegalStateException("Failed to verify current credential", e);
-        }
-        setUserKeyProtection(userId, credential, convertResponse(gkResponse));
-        fixateNewestUserKeyAuth(userId);
-        // Refresh the auth token
-        doVerifyCredential(credential, userId, null /* progressCallback */, 0 /* flags */);
-        synchronizeUnifiedWorkChallengeForProfiles(userId, null);
-        sendCredentialsOnChangeIfRequired(credential, userId, isLockTiedToParent);
-        return true;
     }
 
     private void onPostPasswordChanged(LockscreenCredential newCredential, int userHandle) {
@@ -2099,54 +2067,11 @@ public class LockSettingsService extends ILockSettings.Stub {
         mStorage.writeChildProfileLock(userId, outputStream.toByteArray());
     }
 
-    private byte[] enrollCredential(byte[] enrolledHandle,
-            byte[] enrolledCredential, byte[] toEnroll, int userId) {
-        checkWritePermission(userId);
-        GateKeeperResponse response;
-        try {
-            response = getGateKeeperService().enroll(userId, enrolledHandle,
-                    enrolledCredential, toEnroll);
-        } catch (RemoteException e) {
-            Slog.e(TAG, "Failed to enroll credential", e);
-            return null;
-        }
-
-        if (response == null) {
-            return null;
-        }
-
-        byte[] hash = response.getPayload();
-        if (hash != null) {
-            setKeystorePassword(toEnroll, userId);
-        } else {
-            // Should not happen
-            Slog.e(TAG, "Throttled while enrolling a password");
-        }
-        return hash;
-    }
-
     private void setAuthlessUserKeyProtection(int userId, byte[] key) {
         if (DEBUG) Slog.d(TAG, "setAuthlessUserKeyProtectiond: user=" + userId);
         addUserKeyAuth(userId, null, key);
     }
 
-    private void setUserKeyProtection(int userId, LockscreenCredential credential,
-            VerifyCredentialResponse vcr) {
-        if (DEBUG) Slog.d(TAG, "setUserKeyProtection: user=" + userId);
-        if (vcr == null) {
-            throw new IllegalArgumentException("Null response verifying a credential we just set");
-        }
-        if (vcr.getResponseCode() != VerifyCredentialResponse.RESPONSE_OK) {
-            throw new IllegalArgumentException("Non-OK response verifying a credential we just set "
-                    + vcr.getResponseCode());
-        }
-        byte[] token = vcr.getGatekeeperHAT();
-        if (token == null) {
-            throw new IllegalArgumentException("Empty payload verifying a credential we just set");
-        }
-        addUserKeyAuth(userId, token, secretFromCredential(credential));
-    }
-
     private void clearUserKeyProtection(int userId, byte[] secret) {
         if (DEBUG) Slog.d(TAG, "clearUserKeyProtection user=" + userId);
         final UserInfo userInfo = mUserManager.getUserInfo(userId);