package com.moon.server.helper;
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import javax.crypto.Cipher;
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import javax.crypto.spec.SecretKeySpec;
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import java.util.Base64;
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@SuppressWarnings("ALL")
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public class AesHelper {
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private static final String DEFAULT_KEY = "A#s_lF_sErve_k.y";
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private static final String KEY_ALGORITHM = "AES";
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private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";
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public static String decrypt(String encrypt) throws Exception {
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return decrypt(encrypt, DEFAULT_KEY);
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}
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public static String encrypt(String content) throws Exception {
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return encrypt(content, DEFAULT_KEY);
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}
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private static String base64Encode(byte[] bytes) {
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return Base64.getEncoder().encodeToString(bytes);
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}
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private static byte[] base64Decode(String base64Code) {
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return StringHelper.isEmpty(base64Code) ? null : Base64.getDecoder().decode(base64Code);
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}
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private static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
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// KeyGenerator kGen = KeyGenerator.getInstance(KEY_ALGORITHM)
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// kGen.init(128)
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Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
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cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), KEY_ALGORITHM));
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return cipher.doFinal(content.getBytes("utf-8"));
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}
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public static String encrypt(String content, String encryptKey) throws Exception {
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return base64Encode(aesEncryptToBytes(content, encryptKey));
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}
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public static String decrypt(String encryptStr, String decryptKey) throws Exception {
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return StringHelper.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
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}
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private static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
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// KeyGenerator kGen = KeyGenerator.getInstance(KEY_ALGORITHM)
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// kGen.init(128)
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Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
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cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), KEY_ALGORITHM));
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byte[] decryptBytes = cipher.doFinal(encryptBytes);
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return new String(decryptBytes);
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}
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}
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