我编写了用于加密和解密数据的代码。当我运行Android演示时没有发出加密问题，但我的数据被解密并发生异常，如：
java.lang.NumberFormatException：无法将'+'解析为整数
这是我的EncodeDecodeAES课程。
public class EncodeDecodeAES {
private final static String HEX = "0123456789ABCDEF";
private final static int JELLY_BEAN_4_2 = 17;
private final static byte[] key = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0 };
public static String encrypt(String seed, String cleartext)
throws Exception {
byte[] rawKey = getRawKey(seed.getBytes());
byte[] result = encrypt(rawKey, cleartext.getBytes());
String fromHex = toHex(result);
String base64 = new String(Base64.encodeToString(fromHex.getBytes(), 0));
return base64;
}
public static String decrypt(String seed, String encrypted)
throws Exception {
byte[] seedByte = seed.getBytes();
System.arraycopy(seedByte, 0, key, 0,
((seedByte.length < 16) ? seedByte.length : 16));
String base64 = new String(Base64.decode(encrypted, 0));
byte[] rawKey = getRawKey(seedByte);
byte[] enc = toByte(base64);
byte[] result = decrypt(rawKey, enc);
return new String(result);
}
public static byte[] encryptBytes(String seed, byte[] cleartext)
throws Exception {
byte[] rawKey = getRawKey(seed.getBytes());
byte[] result = encrypt(rawKey, cleartext);
return result;
}
public static byte[] decryptBytes(String seed, byte[] encrypted)
throws Exception {
byte[] rawKey = getRawKey(seed.getBytes());
byte[] result = decrypt(rawKey, encrypted);
return result;
}
private static byte[] getRawKey(byte[] seed) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES"); // , "SC");
SecureRandom sr = null;
if (android.os.Build.VERSION.SDK_INT >= JELLY_BEAN_4_2) {
sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
} else {
sr = SecureRandom.getInstance("SHA1PRNG");
}
sr.setSeed(seed);
try {
kgen.init(256, sr);
// kgen.init(128, sr);
} catch (Exception e) {
// Log.w(LOG,
// "This device doesn't suppor 256bits, trying 192bits.");
try {
kgen.init(192, sr);
} catch (Exception e1) {
// Log.w(LOG,
// "This device doesn't suppor 192bits, trying 128bits.");
kgen.init(128, sr);
}
}
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
return raw;
}
private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES"); // /ECB/PKCS7Padding", "SC");
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"); // /ECB/PKCS7Padding", "SC");
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 static void appendHex(StringBuffer sb, byte b) {
sb.append(HEX.charAt((b >> 4) & 0x0f)).append(HEX.charAt(b & 0x0f));
}
}
这是我的活动代码，我希望在服务器上发送数据并从服务器获得返回响应，并解密我的数据并显示在解密或未解密的日志中。
String encrypted="Dyv6ACIDe2q+OEjztjfNDw==";
@Override
protected void onPostExecute(JSONObject json)
{
super.onPostExecute(json);
try
{
json.put(KEY_REQUEST_ID, RequestId);
json.put(KEY_REQUEST_CODE, RequestCode);
json.put(KEY_CHANNEL_ID, stringChannelId);
json.put(KEY_IP_ADDRESS, str_Device_IP_Address);
json.put(KEY_USERNAME, strUserName);
json.put(KEY_PASSWORD, strPassWord);
String jstr = json.toString();
Log.e("in","onPostExecute(String json) = " + jstr);
String encrypted1 = EncodeDecodeAES.encrypt(json.toString(), textToEncrypt);
System.out.println("encrypted1 =" + encrypted1);
JSONObject jSONObject = new JSONObject();
jSONObject.put(KEY_REQUEST, encrypted1);
jSONObject.put(KEY_VENDOR_ID, "1");
String jsonString = jSONObject.toString();
JSONObject jSONObject_outer = new JSONObject();
jSONObject_outer.put("W2INBCWS", jSONObject);
String strJobject2=jSONObject_outer.toString();
// JSONObject data = new JSONObject(strJobject2);
String decrypted = EncodeDecodeAES.decrypt(strJobject2, encrypted);
System.out.println("decrypted =" + decrypted);
}
catch (JSONException e)
{
e.printStackTrace();
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
pDialog.dismiss();
}
这是我的Log Cat堆栈跟踪。
12-06 16:33:44.893: W/System.err(1024): java.lang.NumberFormatException: unable to parse '+' as integer
12-06 16:33:44.893: W/System.err(1024): at java.lang.Integer.parse(Integer.java:383)
12-06 16:33:44.903: W/System.err(1024): at java.lang.Integer.parseInt(Integer.java:372)
12-06 16:33:44.903: W/System.err(1024): at java.lang.Integer.valueOf(Integer.java:528)
12-06 16:33:44.903: W/System.err(1024): at com.window2india.EncodeDecodeAES.toByte(EncodeDecodeAES.java:183)
12-06 16:33:44.903: W/System.err(1024): at com.window2india.EncodeDecodeAES.decrypt(EncodeDecodeAES.java:53)
12-06 16:33:44.903: W/System.err(1024): at com.window2india.Login$GetJSONParse.onPostExecute(Login.java:195)
12-06 16:33:44.903: W/System.err(1024): at com.window2india.Login$GetJSONParse.onPostExecute(Login.java:1)
12-06 16:33:44.903: W/System.err(1024): at android.os.AsyncTask.finish(AsyncTask.java:417)
12-06 16:33:44.903: W/System.err(1024): at android.os.AsyncTask.access$300(AsyncTask.java:127)
12-06 16:33:44.903: W/System.err(1024): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
12-06 16:33:44.903: W/System.err(1024): at android.os.Handler.dispatchMessage(Handler.java:99)
12-06 16:33:44.903: W/System.err(1024): at android.os.Looper.loop(Looper.java:130)
12-06 16:33:44.903: W/System.err(1024): at android.app.ActivityThread.main(ActivityThread.java:3683)
12-06 16:33:44.914: W/System.err(1024): at java.lang.reflect.Method.invokeNative(Native Method)
12-06 16:33:44.914: W/System.err(1024): at java.lang.reflect.Method.invoke(Method.java:507)
12-06 16:33:44.914: W/System.err(1024): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
12-06 16:33:44.914: W/System.err(1024): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
12-06 16:33:44.914: W/System.err(1024): at dalvik.system.NativeStart.main(Native Method)
12-06 16:33:49.183: W/IInputConnectionWrapper(1024): showStatusIcon on inactive InputConnection