diff --git a/utils-crypto-classic/src/main/java/utils/crypto/classic/AESUtils.java b/utils-crypto-classic/src/main/java/utils/crypto/classic/AESUtils.java
index 46f46707b8d076cf718dc4b6f74c6f704d7c1c64..0bf60eac9785cd76eac27494608b3683275d89c0 100644
--- a/utils-crypto-classic/src/main/java/utils/crypto/classic/AESUtils.java
+++ b/utils-crypto-classic/src/main/java/utils/crypto/classic/AESUtils.java
@@ -23,11 +23,11 @@ import utils.security.EncryptionException;
 public class AESUtils {
 
 	// AES128 supports 128-bit(16 bytes) secret key
-	private static final int KEY_SIZE = 128 / 8;
+	public static final int KEY_SIZE = 128 / 8;
 	// One block contains 16 bytes
-	private static final int BLOCK_SIZE = 16;
+	public static final int BLOCK_SIZE = 16;
 	// Initial vector's size is 16 bytes
-	private static final int IV_SIZE = 16;
+	public static final int IV_SIZE = 16;
 
 	/**
 	 * key generation
diff --git a/utils-crypto-sm/src/main/java/utils/crypto/sm/SM4Utils.java b/utils-crypto-sm/src/main/java/utils/crypto/sm/SM4Utils.java
index 3d56d84b72717bc2af82b3efd23ea38cea397bb0..8d4780014e3f75a4de6bf0728c627c76d401f5ce 100644
--- a/utils-crypto-sm/src/main/java/utils/crypto/sm/SM4Utils.java
+++ b/utils-crypto-sm/src/main/java/utils/crypto/sm/SM4Utils.java
@@ -17,9 +17,9 @@ import utils.security.EncryptionException;
 public class SM4Utils {
 
 	// SM4 supports 128-bit(16 bytes) secret key
-	private static final int KEY_SIZE = 128 / 8;
+	public static final int KEY_SIZE = 128 / 8;
 	// One block contains 16 bytes
-	private static final int BLOCK_SIZE = 16;
+	public static final int BLOCK_SIZE = 16;
 	// Initial vector's size is 16 bytes
 	public static final int IV_SIZE = 16;