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package ***.un***r.ms.utils;
import org.apache.tomcat.util.codec.binary.Base64;
import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec;
/** * @author YSK * @date 2020/8/24 13:13 */ public class SecretUtil { /*** * key和iv值可以随机生成 */ private static String KEY = "1234567890123456";
private static String IV = "1234567890123456";
/*** * 加密 * @param data 要加密的数据 * @return encrypt */ public static String encrypt(String data){ return encrypt(data, KEY, IV); }
/*** * param data 需要解密的数据 * 调用desEncrypt()方法 */ public static String desEncrypt(String data){ return desEncrypt(data, KEY, IV); }
/** * 加密方法 * @param data 要加密的数据 * @param key 加密key * @param iv 加密iv * @return 加密的结果
*/ private static String encrypt(String data, String key, String iv){ try { //"算法/模式/补码方式"NoPadding PkcsPadding Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); int blockSize = cipher.getBlockSize();
byte[] dataBytes = data.getBytes(); int plaintextLength = dataBytes.length; if (plaintextLength % blockSize != 0) { plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize)); }
byte[] plaintext = new byte[plaintextLength]; System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec); byte[] encrypted = cipher.doFinal(plaintext);
return new Base64().encodeToString(encrypted);
} catch (Exception e) { e.printStackTrace(); return null; } }
/** * 解密方法 * @param data 要解密的数据 * @param key 解密key * @param iv 解密iv * @return 解密的结果 */ private static String desEncrypt(String data, String key, String iv){ try { byte[] encrypted1 = new Base64().decode(data);
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec); byte[] original = cipher.doFinal(encrypted1); return new String(original).trim(); } catch (Exception e) { e.printStackTrace(); return null; } } } |