init

src/main/java/com/eactive/eai/util/CryptoUtil.java

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+package com.eactive.eai.util;
+
+import java.util.Base64;
+
+import javax.crypto.Cipher;
+import javax.crypto.spec.SecretKeySpec;
+
+//TOUSE
+//kbank 어댑터에서 업무데이터의 암호화 필드에 대한 암복호화
+//OAuth2.0 의 ClientID를 통해 등록된 key를 조회하여 사용
+public class CryptoUtil {
+	public static final String defaultCharset = "utf-8";
+	private CryptoUtil() {
+
+	}
+
+	public static String encryptAES(String key, String text) {
+		return encrypt(key, text, "AES");
+	}
+
+	public static String decryptAES(String key, String base64EncodedText) {
+		return decrypt(key, base64EncodedText, "AES");
+	}
+
+	public static String encrypt(String key, String text, String algoritm) throws IllegalArgumentException {
+		try {
+			SecretKeySpec secureKey = new SecretKeySpec(key.getBytes(), algoritm);
+			Cipher cipher = Cipher.getInstance(algoritm);
+			cipher.init(Cipher.ENCRYPT_MODE, secureKey);
+			byte[] encryptData = cipher.doFinal(text.getBytes(defaultCharset));
+			return new String(Base64.getEncoder().encode(encryptData));
+		} catch (Exception e) {
+			throw new IllegalArgumentException(e.toString());
+		}
+	}
+
+	public static String decrypt(String key, String text, String algoritm) throws IllegalArgumentException {
+		try {
+			SecretKeySpec secureKey = new SecretKeySpec(key.getBytes(), algoritm);
+			byte[] encryptedData = Base64.getDecoder().decode(text.getBytes(defaultCharset));
+			Cipher cipher = Cipher.getInstance(algoritm);
+			cipher.init(Cipher.DECRYPT_MODE, secureKey);
+			byte[] plainText = cipher.doFinal(encryptedData);
+			return new String(plainText);
+		} catch (Exception e) {
+			throw new IllegalArgumentException(e.toString());
+		}
+	}
+
+	public static void main(String[] args) {
+	        String key = "ONAuROzlqWB4VuBwO5C/FA==";
+	        String text = "Hello AES 한글";
+
+	        System.out.println("Original Text: " + text);
+
+	        long startEncryptTime = System.nanoTime();
+	        String enc = encryptAES(key, text);
+	        long endEncryptTime = System.nanoTime();
+	        long encryptDuration = endEncryptTime - startEncryptTime;
+	        System.out.println("Encrypted Text: " + enc);
+	        System.out.println("Encryption took: " + encryptDuration + " nanoseconds");
+
+	        long startDecryptTime = System.nanoTime();
+	        String dec = decryptAES(key, enc);
+	        long endDecryptTime = System.nanoTime();
+	        long decryptDuration = endDecryptTime - startDecryptTime;
+	        System.out.println("Decrypted Text: " + dec);
+	        System.out.println("Decryption took: " + decryptDuration + " nanoseconds");
+	}
+}