Merge "Switch to HexEncoding from ByteStringUtils"

import android.text.TextUtils;

import android.util.ArrayMap;

import android.util.ArraySet;

import android.util.ByteStringUtils;

import android.util.Slog;

import android.util.SparseArray;

import android.util.SparseBooleanArray;

import com.android.server.LocalServices;

import com.android.server.SystemConfig;

import libcore.util.HexEncoding;

import java.io.File;

import java.io.FileDescriptor;

import java.io.FileNotFoundException;

import java.util.Collection;

import java.util.HashSet;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import java.util.Set;

import java.util.regex.Pattern;

            rand.nextBytes(keyBytes);

            // Convert to string for storage in settings table.

            final String userKey = ByteStringUtils.toHexString(keyBytes);

            final String userKey = HexEncoding.encodeToString(keyBytes, true /* upperCase */);

            // Store the key in the ssaid table.

            final SettingsState ssaidSettings = getSettingsLocked(SETTINGS_TYPE_SSAID, userId);

                }

            }

            final String userKey = userKeySetting.getValue();

            if (userKey == null || userKey.length() % 2 != 0) {

                throw new IllegalStateException("User key invalid");

            }

            // Convert the user's key back to a byte array.

            final byte[] keyBytes = ByteStringUtils.fromHexToByteArray(userKey);

            final byte[] keyBytes = HexEncoding.decode(userKey);

            // Validate that the key is of expected length.

            // Keys are currently 32 bytes, but were once 16 bytes during Android O development.

            if (keyBytes == null || (keyBytes.length != 16 && keyBytes.length != 32)) {

            if (keyBytes.length != 16 && keyBytes.length != 32) {

                throw new IllegalStateException("User key invalid");

            }

            }

            // Convert result to a string for storage in settings table. Only want first 64 bits.

            final String ssaid = ByteStringUtils.toHexString(m.doFinal()).substring(0, 16)

                    .toLowerCase(Locale.US);

            final String ssaid = HexEncoding.encodeToString(m.doFinal(), false /* upperCase */)

                    .substring(0, 16);

            // Save the ssaid in the ssaid table.

            final String uid = Integer.toString(callingPkg.applicationInfo.uid);