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src/main/java/jwtSample.java

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+import org.jasypt.encryption.StringEncryptor;
+import org.jasypt.encryption.pbe.PooledPBEStringEncryptor;
+import org.jasypt.encryption.pbe.config.SimpleStringPBEConfig;
+
+public class jwtSample {
+    private static final String SECRET_KEY = "5840f916c19111ee86fcf38ac250f21377907a8ac19111eebab6e7179f8e5c87";
+    public static void main(String[] args) {
+        System.out.println(stringEncryptor().decrypt("gLQTvX57MBGvHAhEGckIJbVdgG5w1YPO+bZk5+xOvg6DhAIcGcyXib8T605t2Icd"));
+        System.out.println(stringEncryptor().decrypt("KpBRMJPNmBe/zi0mPo32beSSXteAaSEp/Kf7dVV3ss8Qi4mS2bJ+P0eFw2Qs15sV"));
+    }
+
+    public static StringEncryptor stringEncryptor() {
+        PooledPBEStringEncryptor encryptor = new PooledPBEStringEncryptor();
+        SimpleStringPBEConfig config = new SimpleStringPBEConfig();
+
+        config.setPassword("kospo2025"); // 암호화키
+        config.setAlgorithm("PBEWITHHMACSHA512ANDAES_256"); // 알고리즘
+        config.setKeyObtentionIterations("1000"); // 반복할 해싱 회수
+        config.setPoolSize("1"); // 인스턴스 pool
+        config.setProviderName("SunJCE");
+        config.setSaltGeneratorClassName("org.jasypt.salt.RandomSaltGenerator"); // salt 생성 클래스
+        config.setIvGeneratorClassName("org.jasypt.iv.RandomIvGenerator");
+        config.setStringOutputType("base64"); //인코딩 방식
+        encryptor.setConfig(config);
+        return encryptor;
+    }
+}