java實現AES加解密
阿新 • • 發佈：2019-02-08
在資料的傳輸過程中，對於敏感的資料通常會進行加密操作。下面是AES對敏感資料加密的實現。
1.程式碼：
public class AesTest {
private final static String algorithm = "AES/CBC/PKCS5Padding";// AES/ECB/PKCS5Padding不需要IVParams
//必須是16位
private final static String ivParams = "9615932213231253";
public static void main(String[] args) {
String data = "13347255915";
//aes祕鑰有長度限制（16位）
String aesKey = getAesKey();
try {
//加密
byte[] bytes = encryptOrDecrypt(data.getBytes("utf-8"), aesKey, Cipher.ENCRYPT_MODE, algorithm, ivParams);
String encrypt = Base64Util.encrypt(bytes);
System.out.println("加密後的資料是：" + encrypt);
//解密
byte[] bytes1 = encryptOrDecrypt(Base64Util.decrypt(encrypt), aesKey, Cipher.DECRYPT_MODE,
algorithm, ivParams);
System.out.println("解密後的資料是：" + new String(bytes1));
} catch (Exception e) {
e.printStackTrace();
}
}
public static byte[] encryptOrDecrypt(byte[] data, String aesKey, int mode, String algorithm, String ivParams)
throws Exception {
Provider provider = new BouncyCastleProvider();
SecretKeySpec secretKeySpec = new SecretKeySpec(aesKey.getBytes("utf-8"), "AES");
IvParameterSpec ivParameterSpec = new IvParameterSpec(ivParams.getBytes("utf-8"));
Cipher cipher = Cipher.getInstance(algorithm, provider);
cipher.init(mode, secretKeySpec, ivParameterSpec);
byte[] bytes = cipher.doFinal(data);
return bytes;
}
public static String getAesKey() {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < 16; i++) {
int v = (int)(Math.random() * 9);
sb.append(v);
}
return sb.toString();
}
}
BASE64工具類：
public class Base64Util {
public static String encrypt(byte[] data){
return new String(Base64.encode(data));
}
public static byte[] decrypt(String data){
try {
return Base64.decode(data.getBytes("utf-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
}
2.如果想要aes祕鑰不受限制，如24位，32位。參考如下連結：
http://blog.csdn.net/gf771115/article/details/53817658
1.程式碼：
public class AesTest {
private final static String algorithm = "AES/CBC/PKCS5Padding";// AES/ECB/PKCS5Padding不需要IVParams
//必須是16位
private final static String ivParams = "9615932213231253";
public static void main(String[] args) {
String data = "13347255915";
//aes祕鑰有長度限制（16位）
String aesKey = getAesKey();
try {
//加密
byte[] bytes = encryptOrDecrypt(data.getBytes("utf-8"), aesKey, Cipher.ENCRYPT_MODE, algorithm, ivParams);
String encrypt = Base64Util.encrypt(bytes);
System.out.println("加密後的資料是：" + encrypt);
//解密
byte[] bytes1 = encryptOrDecrypt(Base64Util.decrypt(encrypt), aesKey, Cipher.DECRYPT_MODE,
algorithm, ivParams);
System.out.println("解密後的資料是：" + new String(bytes1));
} catch (Exception e) {
e.printStackTrace();
}
}
public static byte[] encryptOrDecrypt(byte[] data, String aesKey, int mode, String algorithm, String ivParams)
throws Exception {
Provider provider = new BouncyCastleProvider();
SecretKeySpec secretKeySpec = new SecretKeySpec(aesKey.getBytes("utf-8"), "AES");
IvParameterSpec ivParameterSpec = new IvParameterSpec(ivParams.getBytes("utf-8"));
Cipher cipher = Cipher.getInstance(algorithm, provider);
cipher.init(mode, secretKeySpec, ivParameterSpec);
byte[] bytes = cipher.doFinal(data);
return bytes;
}
public static String getAesKey() {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < 16; i++) {
int v = (int)(Math.random() * 9);
sb.append(v);
}
return sb.toString();
}
}
BASE64工具類：
public class Base64Util {
public static String encrypt(byte[] data){
return new String(Base64.encode(data));
}
public static byte[] decrypt(String data){
try {
return Base64.decode(data.getBytes("utf-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
}
2.如果想要aes祕鑰不受限制，如24位，32位。參考如下連結：
http://blog.csdn.net/gf771115/article/details/53817658