com.yeepay.yop.sdk.gm.utils

类 Sm4Utils

java.lang.Object

com.yeepay.yop.sdk.gm.utils.Sm4Utils

public class Sm4Utils
extends Object

title:
description:
Copyright: Copyright (c) 2018
Company: 易宝支付(YeePay)

从以下版本开始:

2021/1/29 3:43 下午

版本:

1.0.0

作者:

yunmei.wu

字段概要

字段

限定符和类型	字段和说明
static String	ALGORITHM_NAME
static String	ALGORITHM_NAME_GCM_NOPADDING
static int	DEFAULT_KEY_SIZE SM4算法目前只支持128位（即密钥16字节）

构造器概要

构造器

构造器和说明
Sm4Utils()

方法概要

限定符和类型	方法和说明
static byte[]	decrypt_GCM_NoPadding(byte[] key, String associatedData, String nonce, String ciphertext)
static byte[]	doCBCMac(byte[] key, byte[] iv, byte[] data) 默认使用PKCS7Padding/PKCS5Padding填充的CBCMAC
static byte[]	doCMac(byte[] key, byte[] data)
static byte[]	doGMac(byte[] key, byte[] iv, int tagLength, byte[] data)
static byte[]	generateKey()
static byte[]	generateKey(int keySize)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

ALGORITHM_NAME

public static final String ALGORITHM_NAME

另请参阅:

常量字段值

ALGORITHM_NAME_GCM_NOPADDING

public static final String ALGORITHM_NAME_GCM_NOPADDING

另请参阅:

常量字段值

DEFAULT_KEY_SIZE

public static final int DEFAULT_KEY_SIZE

SM4算法目前只支持128位（即密钥16字节）

另请参阅:

常量字段值

构造器详细资料

Sm4Utils

public Sm4Utils()

方法详细资料

generateKey

public static byte[] generateKey()

generateKey

public static byte[] generateKey(int keySize)
                          throws NoSuchAlgorithmException,
                                 NoSuchProviderException

抛出:

NoSuchAlgorithmException

NoSuchProviderException

doCMac

public static byte[] doCMac(byte[] key,
                            byte[] data)
                     throws NoSuchProviderException,
                            NoSuchAlgorithmException,
                            InvalidKeyException

抛出:

NoSuchProviderException

NoSuchAlgorithmException

InvalidKeyException

doGMac

public static byte[] doGMac(byte[] key,
                            byte[] iv,
                            int tagLength,
                            byte[] data)

doCBCMac

public static byte[] doCBCMac(byte[] key,
                              byte[] iv,
                              byte[] data)

默认使用PKCS7Padding/PKCS5Padding填充的CBCMAC

参数:

key -

iv -

data -

返回:

decrypt_GCM_NoPadding

public static byte[] decrypt_GCM_NoPadding(byte[] key,
                                           String associatedData,
                                           String nonce,
                                           String ciphertext)
                                    throws GeneralSecurityException

抛出:

GeneralSecurityException