SM3是簽名算法，和MD5一樣（對(duì)于應(yīng)用層來說）。

SM4是對(duì)稱加密算法，和AES一樣（對(duì)于應(yīng)用層來說）。

這里還有1點(diǎn)要注意的SM4，的密鑰是128位，也就是16個(gè)字節(jié)。

程序運(yùn)行截圖如下：

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 --------------------華麗的分割線-------------------- 加密:3863d3f134bde1e2c4230dfc31296387 decryptStr:HelloWorld --------------------華麗的分割線-------------------- encryptString:11d61070968d7cd5755ab59733e78770 decryptString:HelloWorldProcess finished with exit code 0

源碼如下：

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(){//密鑰長度為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("--------------------華麗的分割線--------------------");test2();System.out.println("--------------------華麗的分割線--------------------");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>

源碼打包下載地址：

https://github.com/fengfanchen/Java/tree/master/SM3%26SM4

總結(jié)

以上是生活随笔為你收集整理的Java笔记-SM3（国密3）和SM4（国密4）的使用的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。