fix sm2 bug

hutool-crypto/src/main/java/cn/hutool/crypto/asymmetric/SM2.java

@@ -182,7 +182,6 @@ public class SM2 extends AbstractAsymmetricCrypto<SM2> {
 		if (KeyType.PublicKey != keyType) {
 			throw new IllegalArgumentException("Encrypt is only support by public key");
 		}
-		checkKey(keyType);
 		return encrypt(data, new ParametersWithRandom(getCipherParameters(keyType)));
 	}
 
@@ -229,7 +228,6 @@ public class SM2 extends AbstractAsymmetricCrypto<SM2> {
 		if (KeyType.PrivateKey != keyType) {
 			throw new IllegalArgumentException("Decrypt is only support by private key");
 		}
-		checkKey(keyType);
 		return decrypt(data, getCipherParameters(keyType));
 	}
 
@@ -450,26 +448,6 @@ public class SM2 extends AbstractAsymmetricCrypto<SM2> {
 		return null;
 	}
 
-	/**
-	 * 检查对应类型的Key是否存在
-	 *
-	 * @param keyType key类型
-	 */
-	private void checkKey(KeyType keyType) {
-		switch (keyType) {
-			case PublicKey:
-				if (null == this.publicKey) {
-					throw new NullPointerException("No public key provided");
-				}
-				break;
-			case PrivateKey:
-				if (null == this.privateKey) {
-					throw new NullPointerException("No private key provided");
-				}
-				break;
-		}
-	}
-
 	/**
 	 * 获取{@link SM2Engine}，此对象为懒加载模式
 	 *

hutool-crypto/src/test/java/cn/hutool/crypto/test/SM2Test.java

@@ -171,9 +171,7 @@ public class SM2Test {
 		String id = "31323334353637383132333435363738";
 
 		final SM2 sm2 = new SM2(d, x, y);
-
 		final String sign = sm2.signHex(data, id);
-
 		Assert.assertTrue(sm2.verifyHex(data, sign));
 	}
 }