fix decrypt password

src/main/java/com/iconplus/smartproc/util/EncryptDecryptUtils.java

@@ -0,0 +1,52 @@
+package com.iconplus.smartproc.util;
+
+import com.iconplus.smartproc.exception.TechnicalException;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.util.Base64;
+
+public class EncryptDecryptUtils {
+
+    private static final Logger log = LogManager.getLogger(EncryptDecryptUtils.class);
+
+    private EncryptDecryptUtils() {
+    }
+
+    public static String decrypt(String data, String base64PrivateKey) {
+        return decryptChipper(Base64.getDecoder().decode(data.getBytes()), RSAUtil.getPrivateKey(base64PrivateKey));
+    }
+
+    private static String decryptChipper(byte[] data, PrivateKey privateKey) {
+        var result = "";
+        try {
+            var cipher = Cipher.getInstance("RSA/ECB/OAEPWithSHA-256AndMGF1Padding");
+            cipher.init(2, privateKey);
+            result = new String(cipher.doFinal(data));
+        } catch (NoSuchAlgorithmException var3) {
+            log.error("NoSuchAlgorithmException : {}", var3.getMessage());
+            throw new TechnicalException(Constants.ERR_CODE_80000, Constants.N0_SUCH_ALGORITHM_EXCEPTION + var3.getMessage());
+        } catch (NoSuchPaddingException var4) {
+            log.error("NoSuchPaddingException : {}", var4.getMessage());
+            throw new TechnicalException(Constants.ERR_CODE_80000,  Constants.N0_SUCH_PADDING_EXCEPTION + var4.getMessage());
+        } catch (InvalidKeyException var5) {
+            log.error("InvalidKeyException : {}", var5.getMessage());
+            throw new TechnicalException(Constants.ERR_CODE_80000, Constants.INVALID_KEY_EXCEPTION + var5.getMessage());
+        } catch (IllegalBlockSizeException var6) {
+            log.error("IllegalBlockSizeException : {}", var6.getMessage());
+            throw new TechnicalException(Constants.ERR_CODE_80000, Constants.ILEGAL_BLOCK_SIZE_EXCEPTION + var6.getMessage());
+        } catch (BadPaddingException var7) {
+            log.error("BadPaddingException : {}", var7.getMessage());
+            throw new TechnicalException(Constants.ERR_CODE_80000, Constants.BAD_PADDING_EXCEPTION + var7.getMessage());
+        }
+        return result;
+    }
+
+}