Java笔记-SM3（国密3）和SM4（国密4）的使用

落日映苍穹つ 2022-09-09 09:24 332阅读 0赞

SM3是签名算法，和MD5一样（对于应用层来说）。

SM4是对称加密算法，和AES一样（对于应用层来说）。

这里还有1点要注意的SM4，的密钥是128位，也就是16个字节。

程序运行截图如下：

D:\java8\content\bin\java.exe -javaagent:D:\idea\content\lib\idea_rt.jar=62511:D:\idea\content\bin -Dfile.encoding=UTF-8 -classpath D:\java8\content\jre\lib\charsets.jar;D:\java8\content\jre\lib\deploy.jar;D:\java8\content\jre\lib\ext\access-bridge-64.jar;D:\java8\content\jre\lib\ext\cldrdata.jar;D:\java8\content\jre\lib\ext\dnsns.jar;D:\java8\content\jre\lib\ext\jaccess.jar;D:\java8\content\jre\lib\ext\jfxrt.jar;D:\java8\content\jre\lib\ext\localedata.jar;D:\java8\content\jre\lib\ext\nashorn.jar;D:\java8\content\jre\lib\ext\sunec.jar;D:\java8\content\jre\lib\ext\sunjce_provider.jar;D:\java8\content\jre\lib\ext\sunmscapi.jar;D:\java8\content\jre\lib\ext\sunpkcs11.jar;D:\java8\content\jre\lib\ext\zipfs.jar;D:\java8\content\jre\lib\javaws.jar;D:\java8\content\jre\lib\jce.jar;D:\java8\content\jre\lib\jfr.jar;D:\java8\content\jre\lib\jfxswt.jar;D:\java8\content\jre\lib\jsse.jar;D:\java8\content\jre\lib\management-agent.jar;D:\java8\content\jre\lib\plugin.jar;D:\java8\content\jre\lib\resources.jar;D:\java8\content\jre\lib\rt.jar;D:\IDEAProject\SM3&SM4\target\classes;D:\newGenRepository\repository\cn\hutool\hutool-all\5.7.6\hutool-all-5.7.6.jar;D:\newGenRepository\repository\org\bouncycastle\bcprov-jdk15to18\1.68\bcprov-jdk15to18-1.68.jar cn.it1995.Main
    sm3:44526eeba9235bae33f2bab8ff1f9ca8965b59d58be82af8111f336a00c1c432
    --------------------华丽的分割线--------------------
    加密:3863d3f134bde1e2c4230dfc31296387
    decryptStr:HelloWorld
    --------------------华丽的分割线--------------------
    encryptString:11d61070968d7cd5755ab59733e78770
    decryptString:HelloWorld
    
    Process finished with exit code 0

源码如下：

Main.java

package cn.it1995;
    
    import cn.hutool.core.util.CharsetUtil;
    import cn.hutool.crypto.SmUtil;
    import cn.hutool.crypto.symmetric.SM4;
    import cn.hutool.crypto.symmetric.SymmetricCrypto;
    
    public class Main {
    
        static String txt = "HelloWorld";
    
        public static void test1(){
    
            String sm3 = SmUtil.sm3(txt);
            System.out.println("sm3:" + sm3);
        }
    
        public static void test2(){
    
            SymmetricCrypto sm4 = SmUtil.sm4();
            String encryptHex = sm4.encryptHex(txt);
            System.out.println("加密:" + encryptHex);
    
            String decryptStr = sm4.decryptStr(encryptHex, CharsetUtil.CHARSET_UTF_8);
            System.out.println("decryptStr:" + decryptStr);
    
        }
    
        public static void test3(){
    
            //密钥长度为128位
            SM4 sm4 = SmUtil.sm4("1234567891234567".getBytes());
            String encryptString = sm4.encryptHex(txt);
            System.out.println("encryptString:" + encryptString);
            String decryptString = sm4.decryptStr(encryptString, CharsetUtil.CHARSET_UTF_8);
            System.out.println("decryptString:" + decryptString);
        }
    
        public static void main(String[] args) {
    
            test1();
            System.out.println("--------------------华丽的分割线--------------------");
            test2();
            System.out.println("--------------------华丽的分割线--------------------");
            test3();
        }
    }

prm.xml

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>cn.it1995</groupId>
        <artifactId>SM3AndSM4</artifactId>
        <version>1.0-SNAPSHOT</version>
    
        <dependencies>
    
            <dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-all</artifactId>
                <version>5.7.6</version>
            </dependency>
    
            <dependency>
                <groupId>org.bouncycastle</groupId>
                <artifactId>bcprov-jdk15to18</artifactId>
                <version>1.68</version>
            </dependency>
    
        </dependencies>
    
    
    </project>

源码打包下载地址：

[https://github.com/fengfanchen/Java/tree/master/SM3%26SM4][https_github.com_fengfanchen_Java_tree_master_SM3_26SM4]

[https_github.com_fengfanchen_Java_tree_master_SM3_26SM4]: https://github.com/fengfanchen/Java/tree/master/SM3%26SM4