✨ FEAT. webhook 응답 복호화 기능 추가

build.gradle

@@ -64,6 +64,9 @@ dependencies {
 	implementation 'com.squareup.okhttp3:okhttp:3.10.0'
 	implementation 'org.json:json:20200518'
 
+	// webhook
+	implementation 'javax.xml.bind:jaxb-api:2.3.1'
+
     // Spring Security OAUTH 2.1
     implementation 'org.springframework.boot:spring-boot-starter-security'
     implementation 'org.springframework.security:spring-security-oauth2-client'

src/main/java/fairytale/tbd/domain/faceSwap/util/CryptoUtils.java

@@ -0,0 +1,95 @@
+package fairytale.tbd.domain.faceSwap.util;
+
+import java.security.MessageDigest;
+import javax.crypto.Cipher;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+import java.util.Arrays;
+import java.nio.charset.StandardCharsets;
+import javax.xml.bind.DatatypeConverter;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CryptoUtils {
+
+	@Value("${face.akool.apikey}")
+	private String clientSecret;
+
+	@Value("${face.akool.clientId}")
+	private String clientId;
+
+
+	// Generate signature
+	public static String generateMsgSignature(String clientId, String timestamp, String nonce, String msgEncrypt) {
+		String[] arr = {clientId, timestamp, nonce, msgEncrypt};
+		Arrays.sort(arr);
+		String sortedStr = String.join("", arr);
+		return sha1(sortedStr);
+	}
+
+	// SHA-1 hash function
+	private static String sha1(String input) {
+		try {
+			MessageDigest md = MessageDigest.getInstance("SHA-1");
+			byte[] hashBytes = md.digest(input.getBytes(StandardCharsets.UTF_8));
+			return DatatypeConverter.printHexBinary(hashBytes).toLowerCase();
+		} catch (Exception e) {
+			e.printStackTrace();
+			return null;
+		}
+	}
+
+	// Decryption algorithm
+	public static String generateAesDecrypt(String dataEncrypt, String clientId, String clientSecret) {
+		try {
+			byte[] keyBytes = clientSecret.getBytes(StandardCharsets.UTF_8);
+			byte[] ivBytes = clientId.getBytes(StandardCharsets.UTF_8);
+
+			SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
+			IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
+
+			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+			cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
+
+			byte[] encryptedBytes = DatatypeConverter.parseHexBinary(dataEncrypt);
+			byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
+
+			return new String(decryptedBytes, StandardCharsets.UTF_8);
+		} catch (Exception e) {
+			e.printStackTrace();
+			return null;
+		}
+	}
+
+	// Encryption algorithm
+	public static String generateAesEncrypt(String data, String clientId, String clientSecret) {
+		try {
+			byte[] keyBytes = clientSecret.getBytes(StandardCharsets.UTF_8);
+			byte[] ivBytes = clientId.getBytes(StandardCharsets.UTF_8);
+
+			SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
+			IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
+
+			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+			cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
+
+			byte[] encryptedBytes = cipher.doFinal(data.getBytes(StandardCharsets.UTF_8));
+			return DatatypeConverter.printHexBinary(encryptedBytes).toLowerCase();
+		} catch (Exception e) {
+			e.printStackTrace();
+			return null;
+		}
+	}
+
+	// Example usage
+	public String getURL(String timestamp, String nonce, String msgEncrypt, String signature){
+		String newSignature = generateMsgSignature(clientId, timestamp, nonce, msgEncrypt);
+		if (signature.equals(newSignature)) {
+			String result = generateAesDecrypt(msgEncrypt, clientId, clientSecret);
+			return result;
+		}
+		return null;
+	}
+}