客户端需要保存一些基础参数，像是token，userName之类的，单纯保存肯定不行，需要进行加密处理。
1.UserInfoHelper
public class UserInfoHelper {
private static final String USER_INFO = "user_info";//文件名
public static final String APP_SHA_256 = "***************************************";
public static final String USER_TOKEN = "user_token";//token
public static final String USER_CELL = "user_cell";//cell
public static void saveData(Context context, String type, String data) {
try {
PreferenceHelper.saveData(context, USER_INFO, type, EncryptHelper.encrypt(APP_SHA_256, data));
} catch (Exception e) {
e.printStackTrace();
}
}
public static String getUserToken(Context context) {
if (StringUtils.isBlank(PreferenceHelper.getData(context, USER_INFO, USER_TOKEN))) {
return "";
} else {
try {
return EncryptHelper.decrypt(APP_SHA_256, PreferenceHelper.getData(context, USER_INFO, USER_TOKEN));
} catch (Exception e) {
e.printStackTrace();
return "";
}
}
}
}
2.PreferenceHelper
public class PreferenceHelper {
public PreferenceHelper() {
}
public static void saveData(Context context, String name, String key, String content) {
SharedPreferences preferences = context.getSharedPreferences(name, 0);
SharedPreferences.Editor editor = preferences.edit();
editor.putString(key, content);
editor.commit();
}
public static String getData(Context context, String name, String key) {
SharedPreferences preferences = context.getSharedPreferences(name, 0);
return preferences.getString(key, (String) null);
}
public static void saveData(Context context, String name, String key, boolean content) {
SharedPreferences preferences = context.getSharedPreferences(name, 0);
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean(key, content);
editor.commit();
}
public static boolean getData(Context context, String name, String key, boolean defValue) {
SharedPreferences preferences = context.getSharedPreferences(name, 0);
return preferences.getBoolean(key, defValue);
}
public static void clearData(Context context, String name, String key) {
SharedPreferences preferences = context.getSharedPreferences(name, 0);
SharedPreferences.Editor editor = preferences.edit();
editor.putString(key, "");
editor.commit();
}
public static void clearData(Context context, String name) {
SharedPreferences preferences = context.getSharedPreferences(name, 0);
SharedPreferences.Editor editor = preferences.edit();
editor.clear();
editor.commit();
}
}
3.EncryptHelper
public static String encrypt(String seed, String cleartext) throws Exception {
// byte[] rawKey = getRawKey(seed.getBytes());
byte[] rawKey = toByte(seed);
byte[] result = encrypt(rawKey, cleartext.getBytes());
return Base64.encode(result);
}
public static String decrypt(String seed, String encrypted) throws Exception {
// byte[] rawKey = getRawKey(seed.getBytes());
byte[] rawKey = toByte(seed);
// byte[] enc = toByte(encrypted);
byte[] enc = Base64.decode(encrypted);
byte[] result = decrypt(rawKey, enc);
return new String(result);
}
private static byte[] getRawKey(byte[] seed) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
sr.setSeed(seed);
//用的是256的那个
kgen.init(256, sr); // 192 and 256 bits may not be available
SecretKey skey = kgen.generateKey();
return skey.getEncoded();
/*
* return new byte[] { 0x08, 0x08, 0x04, 0x0b, 0x02, 0x0f, 0x0b, 0x0c,
* 0x01, 0x03, 0x09, 0x07, 0x0c, 0x03, 0x07, 0x0a, 0x04, 0x0f, 0x06,
* 0x0f, 0x0e, 0x09, 0x05, 0x01, 0x0a, 0x0a, 0x01, 0x09, 0x06, 0x07,
* 0x09, 0x0d };
*/
}
private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(clear);
return encrypted;
}
private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
byte[] decrypted = cipher.doFinal(encrypted);
return decrypted;
}
public static String toHex(String txt) {
return toHex(txt.getBytes());
}
public static String fromHex(String hex) {
return new String(toByte(hex));
}
public static byte[] toByte(String hexString) {
int len = hexString.length() / 2;
byte[] result = new byte[len];
for (int i = 0; i < len; i++)
result[i] = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2), 16).byteValue();
return result;
}
public static String toHex(byte[] buf) {
if (buf == null)
return "";
StringBuffer result = new StringBuffer(2 * buf.length);
for (int i = 0; i < buf.length; i++) {
appendHex(result, buf[i]);
}
return result.toString();
}
private final static String HEX = "0123456789ABCDEF";
private static void appendHex(StringBuffer sb, byte b) {
sb.append(HEX.charAt((b >> 4) & 0x0f)).append(HEX.charAt(b & 0x0f));
}
public static class Base64 {
private static char[] legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".toCharArray();
public static String encode(byte[] data) {
int start = 0;
int len = data.length;
StringBuffer buf = new StringBuffer(data.length * 3 / 2);
int end = len - 3;
int i = start;
int n = 0;
while (i <= end) {
int d = ((((int) data[i]) & 0x0ff) << 16) | ((((int) data[i + 1]) & 0x0ff) << 8) | (((int) data[i + 2]) & 0x0ff);
buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append(legalChars[(d >> 6) & 63]);
buf.append(legalChars[d & 63]);
i += 3;
if (n++ >= 14) {
n = 0;
buf.append(" ");
}
}
if (i == start + len - 2) {
int d = ((((int) data[i]) & 0x0ff) << 16) | ((((int) data[i + 1]) & 255) << 8);
buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append(legalChars[(d >> 6) & 63]);
buf.append("=");
} else if (i == start + len - 1) {
int d = (((int) data[i]) & 0x0ff) << 16;
buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append("==");
}
return buf.toString();
}
private static int decode(char c) {
if (c >= 'A' && c <= 'Z')
return ((int) c) - 65;
else if (c >= 'a' && c <= 'z')
return ((int) c) - 97 + 26;
else if (c >= '0' && c <= '9')
return ((int) c) - 48 + 26 + 26;
else
switch (c) {
case '+':
return 62;
case '/':
return 63;
case '=':
return 0;
default:
throw new RuntimeException("unexpected code: " + c);
}
}
public static byte[] decode(String s) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
decode(s, bos);
} catch (IOException e) {
throw new RuntimeException();
}
byte[] decodedBytes = bos.toByteArray();
try {
bos.close();
bos = null;
} catch (IOException ex) {
System.err.println("Error while decoding BASE64: " + ex.toString());
}
return decodedBytes;
}
private static void decode(String s, OutputStream os) throws IOException {
int i = 0;
int len = s.length();
while (true) {
while (i < len && s.charAt(i) <= ' ')
i++;
if (i == len)
break;
int tri = (decode(s.charAt(i)) << 18) + (decode(s.charAt(i + 1)) << 12) + (decode(s.charAt(i + 2)) << 6) + (decode(s.charAt(i + 3)));
os.write((tri >> 16) & 255);
if (s.charAt(i + 2) == '=')
break;
os.write((tri >> 8) & 255);
if (s.charAt(i + 3) == '=')
break;
os.write(tri & 255);
i += 4;
}
}
}
一步到位，解决