https://blog.csdn.net/weixin_44876457/article/details/89102723

java的BASE64Encoder,BASE64Decoder加密与解密

package com.app.common;import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;/**
*@DEMO:napp
*@Author:jilongliang
*@Date:2013-7-25
*/
@SuppressWarnings("all")
public class EDncrypt {
private static BASE64Encoder encoder = new BASE64Encoder();// 加密
private static BASE64Decoder decoder = new BASE64Decoder();// 解密/**
* 加密文件
* 
* @param f
* @param path
*/
private static String encryptFile(File f, String path) {
InputStream in = null;
OutputStream out = null;
String key = "";
try {
f = new File(path);
in = new FileInputStream(f);
out = new ByteArrayOutputStream();
// System.out.println(f.getAbsolutePath());
// System.out.println(f.length());
encoder.encodeBuffer(in, out);
key = out.toString();
in.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return key;
}
/**
*解密
* 
* @param f
* @param path
*/
private static String decryptFile(File f, String path) {
InputStream in = null;
OutputStream out = null;
String key = "";
try {
f = new File(path);
in = new FileInputStream(f);
out = new ByteArrayOutputStream();
decoder.decodeBuffer(in, out);
key = out.toString();
in.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return key;
}/**
* 加密
* 
* @param key
* @return
* @throws Exception
*/
public static String encryptBASE64(String inputStr) {
String value = "";
try {
byte[] key = inputStr.getBytes();
value = encoder.encodeBuffer(key);
} catch (Exception e) {
e.printStackTrace();
}
return value;
}/**
* 解密
* 
* @param key
* @return
* @throws Exception
*/
public static String decryptBASE64(String outputStr) {
String value = "";
try {
byte[] key = decoder.decodeBuffer(outputStr);
value = new String(key);
} catch (Exception e) {
}
return value;
}
}

可逆的加密：Apache的
public static String encodePassword(String rawPass,String type) {String pass="";if(type.toLowerCase().equals("md5")){Md5PasswordEncoder md5PasswordEncoder=new Md5PasswordEncoder();pass=md5PasswordEncoder.encodePassword(rawPass, null);}return pass;
}public static String encodePassword(String rawPass) {return encodePassword(rawPass,"MD5");
}

java 加密 Digest EnCrypt 加密与解密
package digest;import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;import org.apache.commons.codec.binary.Base64;public class DigestExample {public static void main(String[] args) throws Exception {//加密内容final String content = "hello hello hello";/** 单向加密 md5 & sha*///md5 加密MessageDigest md5 = MessageDigest.getInstance("md5");byte[] md5SecretStr = md5.digest(content.getBytes());System.out.print("md5 加密 : { " + new String(Base64.encodeBase64(md5SecretStr)) + " }\n\r");//sha 加密MessageDigest sha = MessageDigest.getInstance("sha");byte[] shaSecretBytes = sha.digest(content.getBytes());System.out.print("sha 加密 : { " + new String(Base64.encodeBase64(shaSecretBytes)) + " }\n\r");/** 对称加密 aes & des*///aes 加密KeyGenerator aesKeyGenerator = KeyGenerator.getInstance("aes");SecretKey aesSecretKey = aesKeyGenerator.generateKey();Cipher aesCipher = Cipher.getInstance("aes");aesCipher.init(Cipher.ENCRYPT_MODE, aesSecretKey);byte[] aseResultBytes = aesCipher.doFinal(content.getBytes());System.out.print("aes 加密 : { " + new String(Base64.encodeBase64(aseResultBytes)) + " }\n\r");//aes 解密aesCipher.init(Cipher.DECRYPT_MODE, aesSecretKey);aseResultBytes = aesCipher.doFinal(aseResultBytes);System.out.print("aes 解密: { " + new String(aseResultBytes) + " }\n\r");//des 加密KeyGenerator desKeyGenerator = KeyGenerator.getInstance("aes");SecretKey desSecretKey = desKeyGenerator.generateKey();Cipher desCipher = Cipher.getInstance("aes");desCipher.init(Cipher.ENCRYPT_MODE, desSecretKey);byte[] dseResultBytes = desCipher.doFinal(content.getBytes());System.out.print("des 加密 : { " + new String(Base64.encodeBase64(dseResultBytes)) + " }\n\r");desCipher.init(Cipher.DECRYPT_MODE, desSecretKey);dseResultBytes = desCipher.doFinal(dseResultBytes);System.out.print("aes 解密: { " + new String(dseResultBytes) + " }\n\r");}}console run result
md5 : { ZnptFLLcFU/qw2LdrU1MqA== }sha : { g52cyhSXeHXr8kcWODkq738OAVk= }aes 加密 : { pudmyrvBANStqfcDIb7+DFPK+5gPZP/ais6sibTKyIk= }aes 解密: { hello hello hello }des : { Nx2RwaJBl5+P2eVb0v+JRVTd8tfwAQQ7KA28n97Ln8E= }aes 解密: { hello hello hello }rsa 非对称加密package digest;import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;import javax.crypto.Cipher;import org.apache.commons.codec.binary.Base64;public class RsaExample {public static void main(String[] args) throws Exception {final String context = "rsa加密";KeyPairGenerator kpg = KeyPairGenerator.getInstance("rsa");KeyPair gkp = kpg.generateKeyPair();PrivateKey privateKey = gkp.getPrivate();PublicKey publicKey = gkp.getPublic();byte[] encode1 = privateKey.getEncoded();byte[] encode2 = publicKey.getEncoded();byte[] key1 = Base64.encodeBase64(encode1);byte[] key2 = Base64.encodeBase64(encode2);System.out.println(new String(key1));System.out.println(new String(key2));/*System.out.println("privateKey:{"+privateKey+"}");System.out.println("publicKey:{" +publicKey+"}");*/Cipher cipher = Cipher.getInstance("rsa");cipher.init(1, privateKey);byte[] result = cipher.doFinal(context.getBytes());byte[] signatrue = Base64.encodeBase64(result);System.out.println("result:{" + new String(signatrue)+"}");byte[] i = Base64.decodeBase64(signatrue);cipher.init(2, publicKey);System.out.println(new String(cipher.doFinal(i)));}
}console run 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
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCPirX/2wD50xEeMC/o2MEoI78IN1VOCka3b6DoqcvOtkTnCXcPZwhkSMnxaSGBWAC2OZJtBk20dXL3weTeOxmxGnfDjLDItSTrzYIpKfKH1IBXeGq7Ig+qerFne0bML1X4HRSkJj+jm7vYzOcwmcXrWh/29MSurQTSSVv8J/sxvQIDAQAB
privateKey:{Sun RSA private CRT key, 1024 bitsmodulus:          100798507655562672634382563625239291964945102222464707977557265818850161373345900576705678605564617099559134111187263533690577667029773051561093784895113396514352229224857085774815551784918475310931537765905461572526427050491602207190137661866307492752828388294013838106222346293330945028978188314252819509693public exponent:  65537private exponent: 20818905345464338263561078188370524376115734679391523676460856464652879813687079210313076057874523659301347930619814748798932805909867830781557982091646774464612734768033397966651666313646610127404321982687308504412645000261745579169493965806942893895422786998315749053429010938321263854313553436041981325313prime p:          12235258251843427800322533580271468214768411862644285725616323425147295210732054481178485319627614069545483443675930314214646122186102225213965689240712673prime q:          8238363717445509899921811355733496220359326926172197592231787257563498251698094349890806400362388734966369330560689902140965710482536375658188849975803741prime exponent p: 943169884009231384519118050071432281322154153075040534138176388053223910228090074902935865766799003301093769282249720728937733025377854368996973649145985prime exponent q: 77937432363645210155355341876417407824935268538791255431034501116764101439687787004780505183708149834126508460070307449645219349362536474176069807665873crt coefficient:  11228541263870362801929539584646038800421516291723873773379889902535223043030350582050117672514417336396982286570742313855229425370741626261320117750796856}
publicKey:{Sun RSA public key, 1024 bitsmodulus: 100798507655562672634382563625239291964945102222464707977557265818850161373345900576705678605564617099559134111187263533690577667029773051561093784895113396514352229224857085774815551784918475310931537765905461572526427050491602207190137661866307492752828388294013838106222346293330945028978188314252819509693public exponent: 65537}
result:{XxdVrhgArX5/AnDGGqU2/VGTcrmjcY37SnKxnTR7+5VFaACbj6aSi+S3xyfgu1UHwlDUrpYczCU+ikXrbSQWs9+WGT1CixYrCC04VuxxZ32G4gKLY8Q9Ag904PuTQbA/s/YWuHxfvKykr9r2Epx2wHrZiRKA6eFvVQIQCKzWjvk=}
rsa加密