add spring security and token management

src/main/java/com/iconplus/smartproc/configuration/KeyConfiguration.java

@@ -0,0 +1,30 @@
+package com.iconplus.smartproc.configuration;
+
+import com.iconplus.smartproc.util.RSAUtil;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.security.KeyPair;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+
+@Configuration
+public class KeyConfiguration {
+
+	@Value("${jwt.private-key}")
+	private String privateKey;
+
+	@Value("${jwt.public-key}")
+	private String publicKey;
+
+	@Bean
+	public KeyPair keypairBean() {
+
+		PublicKey pubKey = RSAUtil.getPublicKey(publicKey);
+		PrivateKey privKey = RSAUtil.getPrivateKey(privateKey);
+
+        return new KeyPair(pubKey, privKey);
+	}
+
+}