我有此应用程序,用于保存设备代码,访问令牌和刷新令牌。我想向他们添加加密。但是我从未在android上尝试过,所以如果您可以与我分享示例或一些提示,它是否很可爱。我找到了以下库,但不知道它是否很好。由于我是android中加密技术的新手,所以我希望收到您的来信!
答案 0 :(得分:0)
您可以从AES加密开始
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.InvalidAlgorithmParameterException;
import java.security.spec.AlgorithmParameterSpec;
public class AES256Cipher {
public static byte[] encrypt(byte[] ivBytes, byte[] keyBytes, byte[] textBytes)
throws java.io.UnsupportedEncodingException,
NoSuchAlgorithmException,
NoSuchPaddingException,
InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException {
AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes);
SecretKeySpec newKey = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = null;
cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, newKey, ivSpec);
return cipher.doFinal(textBytes);
}
public static byte[] decrypt(byte[] ivBytes, byte[] keyBytes, byte[] textBytes)
throws java.io.UnsupportedEncodingException,
NoSuchAlgorithmException,
NoSuchPaddingException,
InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException {
AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes);
SecretKeySpec newKey = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, newKey, ivSpec);
return cipher.doFinal(textBytes);
}
}
该类的示例应用程序:
String key = "e8ffc7e56311679f12b6fc91aa77a5eb";
byte[] keyBytes = key.getBytes("UTF-8");
byte[] ivBytes = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
String plainText;
byte[] cipherData;
String base64Text;
//############## Request(crypt) ##############
plainText = "crypt text!!";
cipherData = AES256Cipher.encrypt(ivBytes, keyBytes, plainText.getBytes("UTF-8"));
base64Text = Base64.encodeToString(cipherData, Base64.DEFAULT);
Log.d("encrypt", base64Text); //BhSJd4mRRJo+fGzpxIOUNg==
//############## Response(decrypt) ##############
base64Text = "72XrlydqnUzVrDfDE7ncnQ==";
cipherData = AES256Cipher.decrypt(ivBytes, keyBytes, Base64.decode(base64Text.getBytes("UTF-8"), Base64.DEFAULT));
plainText = new String(cipherData, "UTF-8");
Log.d("dcrypt", plainText); //I'm hungry