package util;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom; ##導入javax.crypto.BadPaddingException;
導入javax.crypto.Cipher;
導入javax.crypto.IllegalBlockSizeException;
導入javax.crypto.KeyGenerator;
#導入javax.crypto.NoSuchdingPadception; ##導入javax.crypto.SecretKey;
導入javax.crypto.spec.SecretKeySpec;
導入org.apache.tomcat.util.codec.binary.Base64;
/**
* @author 管理員
*
*/
public class AES {
// 加密
if (sKey == null) {##系統。
System.out.print("Key長度不是16位");
return null;
}
byte[] raw = sKey.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"演算法/模式/補碼方法」## Cipher.ENCRYPT_MODE, skeySpec);
byte[] 加密= cipher.doFinal(sSrc.getBytes("utf-8"));
return new Base64().encodeToString(entedyp);這裡使用BASE64做轉碼功能，同時可以發揮2次加密的功能。
// 解密
public static String Decrypt(String sSrc, String sKey) throws Exception {
try {
# # System.out.print("Key為空null");
return null 為16位元
if (sKey.length() != 16) {
System.out.print("Key長度不是16位元");
[] raw = sKey.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/CS 5, ipher.DECRYPT_MODE, skeySpec);
byte[] encrypted1 = new Base64().decode(sSrc);//先用base64解密
try {
try {
時 String originalString = new String( original,"utf-8");
return originalString;
} catch (Exception e) {## .
return null;
}
} catch (Exception ex) {
System.out.println(ex.toString());
# . /**
* 加密
*
* @param content 需要加密的內容
* @param password 加密密碼
* @return
## */
public static byte[] encrypt(String content, String password) {
= KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom (password.getBytes()));
SecretKey secretKey = kgen.generateKey();
getd );
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES") ;
Cipher cipher = Cipher.getInstance("AES");// 建立密碼器
gety ");
cipher.init(Cipher.ENCRYPT_MODE , key);// 初始化
byte[] result = cipher.doFinal(byteContent); } catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
## e.printStackTrace();
} catch (UnsupportedEncodingException e) {
# e.printStackTrace();
} catch (IllegalBlockSizeException e) {
# e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
回復中 null;
}
/**解密
* @param content 待解密內容
* @param password 解密金鑰
* @return
*/
public static byte[]解密(byte[]內容，字串密碼) {
KeyGenerator kgen = KeyGenerator.getInstance( "高級加密標準」）；
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey SecretKey = kgen.generateKey();
byte[] enCodeFormat = SecretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");//建立密碼器
/建立密碼器
. ## byte[] result = cipher .doFinal(內容）；
返回結果； // 加密
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
回復中 null;
}
/**將二進位轉換成16進位
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
String 若
for (int i = 0; i .
if (hex.length() == 1) {
}
sb.中上(hex.toUpperCase());
}
return sb.toString();
}
/**將16進位轉換為二進位
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
1 # 1) return null;
byte[] 結果 = 新 byte[hexStr.length()/2];
for (int i = 0;iint high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
int low = Integer.parseInt（hexStr. ), 16);
result[i] = (byte) (high * 16 + low);
turn
}
public static void main(String [] args) throws Exception {
/*
* 此處使用AES-128-ECB加密模式，key需為16位元。
*/
String cKey = "1234567890123456";
// 需要加密的字串
System.out.println(cSrc) ;
// 加密
String enString = AES.Encrypt(cSrc, cKey);
System.out.println("加密後的字符串是：" + enystem.out.println("加密後的字符串是：#enystem.out. // 解密
String DeString = AES.Decrypt(enString, cKey);
System.out.println("解密後的字串為：" + DeString);
String password = "12345678";
//加密
System.out.println("加密前：## System.out.println("加密前：## S pt(content, password);
String encryptResultStr = parseByte2HexStr(encryptResult);
System.out.println("加密後：" + encryptResultStr byte[] decryptFrom = parseHexStr2Byte(encryptResultStr);
byte[] decryptResult = decrypt(decryptFrom,password);
System.out.println("解密後：" + new String(decryptResult));
}##}
以上是如何實現AES加密？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
