通常再傳送資料的過程中
為了資料的保密
我們會使用多種加密方式來保障我們的資料
import android.annotation.SuppressLint;
import android.util.Base64;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.KeyException;
import java.security.NoSuchAlgorithmException;
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;
public class AESClass {
// Your key
private static final String seed = "ADNSJSNGLKNDLKFNLDKNFKLDSLKJ";
// Char Encodind
private static final String characterEncoding = "UTF-8";
// AES formation
private static final String cipherTransformation = "AES/CBC/PKCS5Padding";
private static final String aesEncryptionAlgorithm = "AES";
public static byte[] decrypt(byte[] cipherText, byte[] key,
byte[] initialVector) throws NoSuchAlgorithmException,
NoSuchPaddingException, InvalidKeyException,
InvalidAlgorithmParameterException, IllegalBlockSizeException,
BadPaddingException {
Cipher cipher = Cipher.getInstance(cipherTransformation);
SecretKeySpec secretKeySpecy = new SecretKeySpec(key,
aesEncryptionAlgorithm);
IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector);
cipher.init(Cipher.DECRYPT_MODE, secretKeySpecy, ivParameterSpec);
cipherText = cipher.doFinal(cipherText);
return cipherText;
}
public static byte[] encrypt(byte[] plainText, byte[] key,
byte[] initialVector) throws NoSuchAlgorithmException,
NoSuchPaddingException, InvalidKeyException,
InvalidAlgorithmParameterException, IllegalBlockSizeException,
BadPaddingException {
Cipher cipher = Cipher.getInstance(cipherTransformation);
SecretKeySpec secretKeySpec = new SecretKeySpec(key,
aesEncryptionAlgorithm);
IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector);
cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec);
plainText = cipher.doFinal(plainText);
return plainText;
}
private static byte[] getKeyBytes(String key)
throws UnsupportedEncodingException {
byte[] keyBytes = new byte[16];
byte[] parameterKeyBytes = key.getBytes(characterEncoding);
System.arraycopy(parameterKeyBytes, 0, keyBytes, 0,
Math.min(parameterKeyBytes.length, keyBytes.length));
return keyBytes;
}
// 加密
public static String encrypt(String plainText)
throws UnsupportedEncodingException, InvalidKeyException,
NoSuchAlgorithmException, NoSuchPaddingException,
InvalidAlgorithmParameterException, IllegalBlockSizeException,
BadPaddingException {
byte[] plainTextbytes = plainText.getBytes(characterEncoding);
byte[] keyBytes = getKeyBytes(seed);
return filter(Base64.encodeToString(
encrypt(plainTextbytes, keyBytes, keyBytes), Base64.DEFAULT));
}
// 解密
public static String decrypt(String encryptedText)
throws KeyException, GeneralSecurityException,
GeneralSecurityException, InvalidAlgorithmParameterException,
IllegalBlockSizeException, BadPaddingException, IOException {
byte[] cipheredBytes = Base64.decode(encryptedText, Base64.DEFAULT);
byte[] keyBytes = getKeyBytes(seed);
return new String(decrypt(cipheredBytes, keyBytes, keyBytes),
characterEncoding);
}
/**
* 去掉加密字符串换行符
*
* @param str
* @return
*/
public static String filter(String str) {
String output = "";
StringBuffer sb = new StringBuffer();
for (int i = 0; i < str.length(); i++) {
int asc = str.charAt(i);
if (asc != 10 && asc != 13) {
sb.append(str.subSequence(i, i + 1));
}
}
output = new String(sb);
return output;
}
}
參考資料 :
android AES加密
參考資料 :
.NET/android/java/iOS AES通用加密解密
參考資料 :
AES加密并经过Base64编码，安卓php通用
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