package cc.mrbird.febs.pay.util;
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import javax.crypto.Cipher;
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import javax.crypto.spec.SecretKeySpec;
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import java.security.Security;
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import java.util.Base64;
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/**
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* AES加解密工具类
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* @author chenyf
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* @date 2018-12-15
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*/
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public class AESUtil {
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// private static final Logger logger = LoggerFactory.getLogger(AesUtils.class);
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public static final String ALGORITHM = "AES/ECB/PKCS5Padding";
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public static final String UTF_8 = "UTF-8";
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public static final String AES = "AES";
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public static final String BC = "BC";
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static {
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//仅加载一次，不要多次加载，可能会导致内存溢出
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Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
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}
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/**
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* 网联敏感字段AES加密
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*
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* @param str 敏感字段原文
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* @param key AES密钥 必须是8位、16位、24位
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* @return
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*/
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public static String Aes256Encode(String str, String key) {
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// if(StringUtil.isNotBlank(str)) {
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try {
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Cipher cipher = Cipher.getInstance(ALGORITHM, BC);
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SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(UTF_8), AES); // 生成加密解密需要的Key
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cipher.init(Cipher.ENCRYPT_MODE, keySpec);
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byte[] result = cipher.doFinal(str.getBytes(UTF_8));
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return Base64.getEncoder().encodeToString(result);
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} catch (Exception e) {
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// logger.error("Aes256Encode error:", e);
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return null;
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}
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}
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/**
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* 网联敏感字段密文解密
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*
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* @param base64Str 要被解密的密文.做了base64编码 base64Str
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* @param key AES密钥 必须是8位、16位、24位
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* @return 解密后的字符串
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*/
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public static String Aes256Decode(String base64Str, String key) {
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// if (StringUtil.isNotBlank(base64Str)) {
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String result = null;
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try {
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Cipher cipher = Cipher.getInstance(ALGORITHM, BC);
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SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(UTF_8), AES); // 生成加密解密需要的Key
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cipher.init(Cipher.DECRYPT_MODE, keySpec);
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byte[] decoded = cipher.doFinal(Base64Util.decode(base64Str));
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result = new String(decoded, "UTF-8");
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} catch (Exception e) {
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e.printStackTrace();
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}
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return result;
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}
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}
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