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java代碼解密工具 java 加解密算法

求一款java的AES加密解密的軟件源代碼(完整)

#include stdio.h

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#include stdlib.h

#include fcntl.h

#include unistd.h

#define JIA_SIZE 1024

#define M_S 25

//加密菜單

void menu()

{

puts("(1)加密");

puts("(2)解密");

puts("(3)退出");

}

//加密

void jiami(const char *path/*加密路徑*/)

{

int i;

int fp,len;

char buffer[1024];

puts("正在加密... ...");

fp = open(path,O_RDWR); //open以讀寫方式打開

len=read(fp,buffer,1024);

puts("將要加密的數(shù)據(jù)");

puts(buffer);

printf("字符一共有: %d\n",len);

puts("準(zhǔn)備加密");

for(i=0;ilen;i++)

{

buffer[i] ^= M_S;

}

lseek(fp,0,SEEK_SET);

write(fp,buffer,len);

close(fp); //關(guān)閉文件

}

int main(int argc,char *argv[])

{

FILE *fp;

char buffer[JIA_SIZE];

char ch;

if(argc 2){ //如果沒有輸入路徑就錯(cuò)誤

puts("請(qǐng)輸入正確的參數(shù)比如: ./jiami /home/long/bin/123.txt");

return 0;

}

else{//顯示加密或者解密路徑

printf("你加密或者解密的路徑:");

puts(argv[1]);

}

menu(); //顯示菜單

switch(ch=getchar())

{

case '1'://加密

jiami(argv[1]);

break;

case '2'://解密

jiami(argv[1]);

break;

case '3'://退出

return 0;

break;

defualt:

puts("請(qǐng)輸入正確的菜單參數(shù)(1-3)");

}

return 0;

}

誰(shuí)能提供下java中有關(guān)加密和解密的代碼

public?static?void?main(String[]?args)?throws?Exception?{??

String?data?=?"itxxz";??

System.out.println("字符串:itxxz");??

System.err.println("加密:"+encrypt(data));??

System.err.println("解密:"+decrypt(encrypt(data)));??

}

運(yùn)行結(jié)果:

由于代碼太多,可到 ?itxxz.com/a/javashili/2014/1217/encrypt_decrypt.html? 查看,注釋也比較完整,清晰易懂

java密碼加密與解密

以下兩個(gè)類可以很方便的完成字符串的加密和解密

加密 CryptHelper encrypt(password)

解密 CrypHelper decrypt(password)

代碼如下

CryptUtils java

[java]

package gdie lab crypt;

import java io IOException;

import javax crypto Cipher;

import javax crypto KeyGenerator;

import javax crypto SecretKey;

import apache xerces internal impl dv util Base ;

public class CryptUtils {

private static String Algorithm = DES ;

private static byte[] DEFAULT_KEY=new byte[] { };

private static String VALUE_ENCODING= UTF ;

/**

* 生成密鑰

*

* @return byte[] 返回生成的密鑰

* @throws exception

*???????????? 扔出異常

*/

public static byte[] getSecretKey() throws Exception {

KeyGenerator keygen = KeyGenerator getInstance(Algorithm)

SecretKey deskey = keygen generateKey()

// if (debug ) System out println ( 生成密鑰 +byte hex (deskey getEncoded

// ()))

return deskey getEncoded()

}

/**

* 將指定的數(shù)據(jù)根據(jù)提供的密鑰進(jìn)行加密

*

* @param input

*??????????? 需要加密的數(shù)據(jù)

* @param key

*??????????? 密鑰

* @return byte[] 加密后的數(shù)據(jù)

* @throws Exception

*/

public static byte[] encryptData(byte[] input byte[] key) throws Exception {

SecretKey deskey = new javax crypto spec SecretKeySpec(key Algorithm)

// if (debug )

// {

// System out println ( 加密前的二進(jìn)串 +byte hex (input ))

// System out println ( 加密前的字符串 +new String (input ))

//

// }

Cipher c = Cipher getInstance(Algorithm)

c init(Cipher ENCRYPT_MODE deskey)

byte[] cipherByte = c doFinal(input)

// if (debug ) System out println ( 加密后的二進(jìn)串 +byte hex (cipherByte ))

return cipherByte;

}

public static byte[] encryptData(byte[] input) throws Exception {

return encryptData(input DEFAULT_KEY)

}

/**

* 將給定的已加密的數(shù)據(jù)通過指定的密鑰進(jìn)行解密

*

* @param input

*??????????? 待解密的數(shù)據(jù)

* @param key

*??????????? 密鑰

* @return byte[] 解密后的數(shù)據(jù)

* @throws Exception

*/

public static byte[] decryptData(byte[] input byte[] key) throws Exception {

SecretKey deskey = new javax crypto spec SecretKeySpec(key Algorithm)

// if (debug ) System out println ( 解密前的信息 +byte hex (input ))

Cipher c = Cipher getInstance(Algorithm)

c init(Cipher DECRYPT_MODE deskey)

byte[] clearByte = c doFinal(input)

// if (debug )

// {

// System out println ( 解密后的二進(jìn)串 +byte hex (clearByte ))

// System out println ( 解密后的字符串 +(new String (clearByte )))

//

// }

return clearByte;

}

public static byte[] decryptData(byte[] input) throws Exception {

return decryptData(input DEFAULT_KEY)

}

/**

* 字節(jié)碼轉(zhuǎn)換成 進(jìn)制字符串

*

* @param byte[] b 輸入要轉(zhuǎn)換的字節(jié)碼

* @return String 返回轉(zhuǎn)換后的 進(jìn)制字符串

*/

public static String byte hex(byte[] bytes) {

StringBuilder hs = new StringBuilder()

for(byte b : bytes)

hs append(String format( % $ X b))

return hs toString()

}

public static byte[] hex byte(String content) {

int l=content length()》 ;

byte[] result=new byte[l];

for(int i= ;il;i++) {

int j=i《 ;

String s=content substring(j j+ )

result[i]=Integer valueOf(s ) byteValue()

}

return result;

}

/**

* 將字節(jié)數(shù)組轉(zhuǎn)換為base 編碼字符串

* @param buffer

* @return

*/

public static String bytesToBase (byte[] buffer) {

//BASE Encoder en=new BASE Encoder()

return Base encode(buffer)

//????? return encoder encode(buffer)

}

/**

* 將base 編碼的字符串解碼為字節(jié)數(shù)組

* @param value

* @return

* @throws IOException

*/

public static byte[] base ToBytes(String value) throws IOException {

//return Base decodeToByteArray(value)

//????? System out println(decoder decodeBuffer(value))

//????? return decoder decodeBuffer(value)

return Base decode(value)

}

/**

* 加密給定的字符串

* @param value

* @return 加密后的base 字符串

*/

public static String encryptString(String value) {

return encryptString(value DEFAULT_KEY)

}

/**

* 根據(jù)給定的密鑰加密字符串

* @param value 待加密的字符串

* @param key 以BASE 形式存在的密鑰

* @return 加密后的base 字符串

* @throws IOException

*/

public static String encryptString(String value String key) throws IOException {

return encryptString(value base ToBytes(key))

}

/**

* 根據(jù)給定的密鑰加密字符串

* @param value 待加密的字符串

* @param key 字節(jié)數(shù)組形式的密鑰

* @return 加密后的base 字符串

*/

public static String encryptString(String value byte[] key) {

try {

byte[] data=value getBytes(VALUE_ENCODING)

data=CryptUtils encryptData(data key)

return bytesToBase (data)

} catch (Exception e) {

// TODO Auto generated catch block

e printStackTrace()

return null;

}

}

/**

* 解密字符串

* @param value base 形式存在的密文

* @return 明文

*/

public static String decryptString(String value) {

return decryptString(value DEFAULT_KEY)

}

/**

* 解密字符串

* @param value base 形式存在的密文

* @param key base 形式存在的密鑰

* @return 明文

* @throws IOException

*/

public static String decryptString(String value String key) throws IOException {

String s=decryptString(value base ToBytes(key))

return s;

}

/**

* 解密字符串

* @param value base 形式存在的密文

* @param key 字節(jié)數(shù)據(jù)形式存在的密鑰

* @return 明文

*/

public static String decryptString(String value byte[] key) {

try {

byte[] data=base ToBytes(value)

data=CryptUtils decryptData(data key)

return new String(data VALUE_ENCODING)

}catch(Exception e) {

e printStackTrace()

return null;

}

}

}

package gdie lab crypt;

import java io IOException;

import javax crypto Cipher;

import javax crypto KeyGenerator;

import javax crypto SecretKey;

import apache xerces internal impl dv util Base ;

public class CryptUtils {

private static String Algorithm = DES ;

private static byte[] DEFAULT_KEY=new byte[] { };

private static String VALUE_ENCODING= UTF ;

/**

* 生成密鑰

*

* @return byte[] 返回生成的密鑰

* @throws exception

*???????????? 扔出異常

*/

public static byte[] getSecretKey() throws Exception {

KeyGenerator keygen = KeyGenerator getInstance(Algorithm)

SecretKey deskey = keygen generateKey()

// if (debug ) System out println ( 生成密鑰 +byte hex (deskey getEncoded

// ()))

return deskey getEncoded()

}

/**

* 將指定的數(shù)據(jù)根據(jù)提供的密鑰進(jìn)行加密

*

* @param input

*??????????? 需要加密的數(shù)據(jù)

* @param key

*??????????? 密鑰

* @return byte[] 加密后的數(shù)據(jù)

* @throws Exception

*/

public static byte[] encryptData(byte[] input byte[] key) throws Exception {

SecretKey deskey = new javax crypto spec SecretKeySpec(key Algorithm)

// if (debug )

// {

// System out println ( 加密前的二進(jìn)串 +byte hex (input ))

// System out println ( 加密前的字符串 +new String (input ))

//

// }

Cipher c = Cipher getInstance(Algorithm)

c init(Cipher ENCRYPT_MODE deskey)

byte[] cipherByte = c doFinal(input)

// if (debug ) System out println ( 加密后的二進(jìn)串 +byte hex (cipherByte ))

return cipherByte;

}

public static byte[] encryptData(byte[] input) throws Exception {

return encryptData(input DEFAULT_KEY)

}

/**

* 將給定的已加密的數(shù)據(jù)通過指定的密鑰進(jìn)行解密

*

* @param input

*??????????? 待解密的數(shù)據(jù)

* @param key

*??????????? 密鑰

* @return byte[] 解密后的數(shù)據(jù)

* @throws Exception

*/

public static byte[] decryptData(byte[] input byte[] key) throws Exception {

SecretKey deskey = new javax crypto spec SecretKeySpec(key Algorithm)

// if (debug ) System out println ( 解密前的信息 +byte hex (input ))

Cipher c = Cipher getInstance(Algorithm)

c init(Cipher DECRYPT_MODE deskey)

byte[] clearByte = c doFinal(input)

// if (debug )

// {

// System out println ( 解密后的二進(jìn)串 +byte hex (clearByte ))

// System out println ( 解密后的字符串 +(new String (clearByte )))

//

// }

return clearByte;

}

public static byte[] decryptData(byte[] input) throws Exception {

return decryptData(input DEFAULT_KEY)

}

/**

* 字節(jié)碼轉(zhuǎn)換成 進(jìn)制字符串

*

* @param byte[] b 輸入要轉(zhuǎn)換的字節(jié)碼

* @return String 返回轉(zhuǎn)換后的 進(jìn)制字符串

*/

public static String byte hex(byte[] bytes) {

StringBuilder hs = new StringBuilder()

for(byte b : bytes)

hs append(String format( % $ X b))

return hs toString()

}

public static byte[] hex byte(String content) {

int l=content length()》 ;

byte[] result=new byte[l];

for(int i= ;il;i++) {

int j=i《 ;

String s=content substring(j j+ )

result[i]=Integer valueOf(s ) byteValue()

}

return result;

}

/**

* 將字節(jié)數(shù)組轉(zhuǎn)換為base 編碼字符串

* @param buffer

* @return

*/

public static String bytesToBase (byte[] buffer) {

//BASE Encoder en=new BASE Encoder()

return Base encode(buffer)

//? return encoder encode(buffer)

}

/**

* 將base 編碼的字符串解碼為字節(jié)數(shù)組

* @param value

* @return

* @throws IOException

*/

public static byte[] base ToBytes(String value) throws IOException {

//return Base decodeToByteArray(value)

//? System out println(decoder decodeBuffer(value))

//? return decoder decodeBuffer(value)

return Base decode(value)

}

/**

* 加密給定的字符串

* @param value

* @return 加密后的base 字符串

*/

public static String encryptString(String value) {

return encryptString(value DEFAULT_KEY)

}

/**

* 根據(jù)給定的密鑰加密字符串

* @param value 待加密的字符串

* @param key 以BASE 形式存在的密鑰

* @return 加密后的base 字符串

* @throws IOException

*/

public static String encryptString(String value String key) throws IOException {

return encryptString(value base ToBytes(key))

}

/**

* 根據(jù)給定的密鑰加密字符串

* @param value 待加密的字符串

* @param key 字節(jié)數(shù)組形式的密鑰

* @return 加密后的base 字符串

*/

public static String encryptString(String value byte[] key) {

try {

byte[] data=value getBytes(VALUE_ENCODING)

data=CryptUtils encryptData(data key)

return bytesToBase (data)

} catch (Exception e) {

// TODO Auto generated catch block

e printStackTrace()

return null;

}

}

/**

* 解密字符串

* @param value base 形式存在的密文

* @return 明文

*/

public static String decryptString(String value) {

return decryptString(value DEFAULT_KEY)

}

/**

* 解密字符串

* @param value base 形式存在的密文

* @param key base 形式存在的密鑰

* @return 明文

* @throws IOException

*/

public static String decryptString(String value String key) throws IOException {

String s=decryptString(value base ToBytes(key))

return s;

}

/**

* 解密字符串

* @param value base 形式存在的密文

* @param key 字節(jié)數(shù)據(jù)形式存在的密鑰

* @return 明文

*/

public static String decryptString(String value byte[] key) {

try {

byte[] data=base ToBytes(value)

data=CryptUtils decryptData(data key)

return new String(data VALUE_ENCODING)

}catch(Exception e) {

e printStackTrace()

return null;

}

}

}

CryptHelper java

[java]

package gdie lab crypt;

import javax crypto Cipher;

import javax crypto SecretKey;

import javax crypto SecretKeyFactory;

import javax crypto spec DESKeySpec;

import javax crypto spec IvParameterSpec;

import springframework util DigestUtils;

public class CryptHelper{

private static String CRYPT_KEY = zhongqian ;

//加密

private static Cipher ecip;

//解密

private static Cipher dcip;

static {

try {

String KEY = DigestUtils md DigestAsHex(CRYPT_KEY getBytes()) toUpperCase()

KEY = KEY substring( )

byte[] bytes = KEY getBytes()

DESKeySpec ks = new DESKeySpec(bytes)

SecretKeyFactory skf = SecretKeyFactory getInstance( DES )

SecretKey sk = skf generateSecret(ks)

IvParameterSpec iv = new IvParameterSpec(bytes)

ecip = Cipher getInstance( DES/CBC/PKCS Padding )

ecip init(Cipher ENCRYPT_MODE sk iv )

dcip = Cipher getInstance( DES/CBC/PKCS Padding )

dcip init(Cipher DECRYPT_MODE sk iv )

}catch(Exception ex) {

ex printStackTrace()

}

}

public static String encrypt(String content) throws Exception {

byte[] bytes = ecip doFinal(content getBytes( ascii ))

return CryptUtils byte hex(bytes)

}

public static String decrypt(String content) throws Exception {

byte[] bytes? = CryptUtils hex byte(content)

bytes = dcip doFinal(bytes)

return new String(bytes ascii )

}

//test

public static void main(String[] args) throws Exception {

String password = gly ;

String en = encrypt(password)

System out println(en)

System out println(decrypt(en))

}

}

package gdie lab crypt;

import javax crypto Cipher;

import javax crypto SecretKey;

import javax crypto SecretKeyFactory;

import javax crypto spec DESKeySpec;

import javax crypto spec IvParameterSpec;

import springframework util DigestUtils;

public class CryptHelper{

private static String CRYPT_KEY = zhongqian ;

//加密

private static Cipher ecip;

//解密

private static Cipher dcip;

static {

try {

String KEY = DigestUtils md DigestAsHex(CRYPT_KEY getBytes()) toUpperCase()

KEY = KEY substring( )

byte[] bytes = KEY getBytes()

DESKeySpec ks = new DESKeySpec(bytes)

SecretKeyFactory skf = SecretKeyFactory getInstance( DES )

SecretKey sk = skf generateSecret(ks)

IvParameterSpec iv = new IvParameterSpec(bytes)

ecip = Cipher getInstance( DES/CBC/PKCS Padding )

ecip init(Cipher ENCRYPT_MODE sk iv )

dcip = Cipher getInstance( DES/CBC/PKCS Padding )

dcip init(Cipher DECRYPT_MODE sk iv )

}catch(Exception ex) {

ex printStackTrace()

}

}

public static String encrypt(String content) throws Exception {

byte[] bytes = ecip doFinal(content getBytes( ascii ))

return CryptUtils byte hex(bytes)

}

public static String decrypt(String content) throws Exception {

byte[] bytes? = CryptUtils hex byte(content)

bytes = dcip doFinal(bytes)

return new String(bytes ascii )

}

//test

public static void main(String[] args) throws Exception {

String password = gly ;

String en = encrypt(password)

System out println(en)

System out println(decrypt(en))

}

lishixinzhi/Article/program/Java/hx/201311/26449

Java中用Base64編程的文件批量加密解密工具程序代碼

/** * BASE64解密 * * @param key * @return * @throws Exception */

public static byte[] decryptBASE64(String key) throws Exception { return (new BASE64Decoder()).decodeBuffer(key); } /** * BASE64加密 * * @param key * @return * @throws Exception */ public static String encryptBASE64(byte[] key) throws Exception { return (new BASE64Encoder()).encodeBuffer(key); }

java加密解密代碼

package com.cube.limail.util;

import javax.crypto.Cipher;

import javax.crypto.KeyGenerator;

import javax.crypto.SecretKey;/**

* 加密解密類

*/

public class Eryptogram

{

private static String Algorithm ="DES";

private String key="CB7A92E3D3491964";

//定義 加密算法,可用 DES,DESede,Blowfish

static boolean debug = false ;

/**

* 構(gòu)造子注解.

*/

public Eryptogram ()

{

} /**

* 生成密鑰

* @return byte[] 返回生成的密鑰

* @throws exception 扔出異常.

*/

public static byte [] getSecretKey () throws Exception

{

KeyGenerator keygen = KeyGenerator.getInstance (Algorithm );

SecretKey deskey = keygen.generateKey ();

System.out.println ("生成密鑰:"+bytesToHexString (deskey.getEncoded ()));

if (debug ) System.out.println ("生成密鑰:"+bytesToHexString (deskey.getEncoded ()));

return deskey.getEncoded ();

} /**

* 將指定的數(shù)據(jù)根據(jù)提供的密鑰進(jìn)行加密

* @param input 需要加密的數(shù)據(jù)

* @param key 密鑰

* @return byte[] 加密后的數(shù)據(jù)

* @throws Exception

*/

public static byte [] encryptData (byte [] input ,byte [] key ) throws Exception

{

SecretKey deskey = new javax.crypto.spec.SecretKeySpec (key ,Algorithm );

if (debug )

{

System.out.println ("加密前的二進(jìn)串:"+byte2hex (input ));

System.out.println ("加密前的字符串:"+new String (input ));

} Cipher c1 = Cipher.getInstance (Algorithm );

c1.init (Cipher.ENCRYPT_MODE ,deskey );

byte [] cipherByte =c1.doFinal (input );

if (debug ) System.out.println ("加密后的二進(jìn)串:"+byte2hex (cipherByte ));

return cipherByte ;

} /**

* 將給定的已加密的數(shù)據(jù)通過指定的密鑰進(jìn)行解密

* @param input 待解密的數(shù)據(jù)

* @param key 密鑰

* @return byte[] 解密后的數(shù)據(jù)

* @throws Exception

*/

public static byte [] decryptData (byte [] input ,byte [] key ) throws Exception

{

SecretKey deskey = new javax.crypto.spec.SecretKeySpec (key ,Algorithm );

if (debug ) System.out.println ("解密前的信息:"+byte2hex (input ));

Cipher c1 = Cipher.getInstance (Algorithm );

c1.init (Cipher.DECRYPT_MODE ,deskey );

byte [] clearByte =c1.doFinal (input );

if (debug )

{

System.out.println ("解密后的二進(jìn)串:"+byte2hex (clearByte ));

System.out.println ("解密后的字符串:"+(new String (clearByte )));

} return clearByte ;

} /**

* 字節(jié)碼轉(zhuǎn)換成16進(jìn)制字符串

* @param byte[] b 輸入要轉(zhuǎn)換的字節(jié)碼

* @return String 返回轉(zhuǎn)換后的16進(jìn)制字符串

*/

public static String byte2hex (byte [] b )

{

String hs ="";

String stmp ="";

for (int n =0 ;n b.length ;n ++)

{

stmp =(java.lang.Integer.toHexString (b [n ] 0XFF ));

if (stmp.length ()==1 ) hs =hs +"0"+stmp ;

else hs =hs +stmp ;

if (n b.length -1 ) hs =hs +":";

} return hs.toUpperCase ();

}

/**

* 字符串轉(zhuǎn)成字節(jié)數(shù)組.

* @param hex 要轉(zhuǎn)化的字符串.

* @return byte[] 返回轉(zhuǎn)化后的字符串.

*/

public static byte[] hexStringToByte(String hex) {

int len = (hex.length() / 2);

byte[] result = new byte[len];

char[] achar = hex.toCharArray();

for (int i = 0; i len; i++) {

int pos = i * 2;

result[i] = (byte) (toByte(achar[pos]) 4 | toByte(achar[pos + 1]));

}

return result;

}

private static byte toByte(char c) {

byte b = (byte) "0123456789ABCDEF".indexOf(c);

return b;

}

/**

* 字節(jié)數(shù)組轉(zhuǎn)成字符串.

* @param String 要轉(zhuǎn)化的字符串.

* @return 返回轉(zhuǎn)化后的字節(jié)數(shù)組.

*/

public static final String bytesToHexString(byte[] bArray) {

StringBuffer sb = new StringBuffer(bArray.length);

String sTemp;

for (int i = 0; i bArray.length; i++) {

sTemp = Integer.toHexString(0xFF bArray[i]);

if (sTemp.length() 2)

sb.append(0);

sb.append(sTemp.toUpperCase());

}

return sb.toString();

}

/**

* 從數(shù)據(jù)庫(kù)中獲取密鑰.

* @param deptid 企業(yè)id.

* @return 要返回的字節(jié)數(shù)組.

* @throws Exception 可能拋出的異常.

*/

public static byte[] getSecretKey(long deptid) throws Exception {

byte[] key=null;

String value=null;

//CommDao dao=new CommDao();

// List list=dao.getRecordList("from Key k where k.deptid="+deptid);

//if(list.size()0){

//value=((com.csc.sale.bean.Key)list.get(0)).getKey();

value = "CB7A92E3D3491964";

key=hexStringToByte(value);

//}

if (debug)

System.out.println("密鑰:" + value);

return key;

}

public String encryptData2(String data) {

String en = null;

try {

byte[] key=hexStringToByte(this.key);

en = bytesToHexString(encryptData(data.getBytes(),key));

} catch (Exception e) {

e.printStackTrace();

}

return en;

}

public String decryptData2(String data) {

String de = null;

try {

byte[] key=hexStringToByte(this.key);

de = new String(decryptData(hexStringToByte(data),key));

} catch (Exception e) {

e.printStackTrace();

}

return de;

}

} 加密使用: byte[] key=Eryptogram.getSecretKey(deptid); //獲得鑰匙(字節(jié)數(shù)組)

byte[] tmp=Eryptogram.encryptData(password.getBytes(), key); //傳入密碼和鑰匙,獲得加密后的字節(jié)數(shù)組的密碼

password=Eryptogram.bytesToHexString(tmp); //將字節(jié)數(shù)組轉(zhuǎn)化為字符串,獲得加密后的字符串密碼解密與之差不多

求高手給出以下JAVA代碼的DES加密解密方法的對(duì)應(yīng)的C#的DES加密解密方法

Java密碼學(xué)結(jié)構(gòu)設(shè)計(jì)遵循兩個(gè)原則:

1) 算法的獨(dú)立性和可靠性。

2) 實(shí)現(xiàn)的獨(dú)立性和相互作用性。

算法的獨(dú)立性是通過定義密碼服務(wù)類來(lái)獲得。用戶只需了解密碼算法的概念,而不用去關(guān)心如何實(shí)現(xiàn)這些概念。實(shí)現(xiàn)的獨(dú)立性和相互作用性通過密碼服務(wù)提供器來(lái)實(shí)現(xiàn)。密碼服務(wù)提供器是實(shí)現(xiàn)一個(gè)或多個(gè)密碼服務(wù)的一個(gè)或多個(gè)程序包。軟件開發(fā)商根據(jù)一定接口,將各種算法實(shí)現(xiàn)后,打包成一個(gè)提供器,用戶可以安裝不同的提供器。安裝和配置提供器,可將包含提供器的ZIP和JAR文件放在CLASSPATH下,再編輯Java安全屬性文件來(lái)設(shè)置定義一個(gè)提供器。

DES算法及如何利用DES算法加密和解密類文件的步驟:

DES算法簡(jiǎn)介

DES(Data Encryption Standard)是發(fā)明最早的最廣泛使用的分組對(duì)稱加密算法。DES算法的入口參數(shù)有三個(gè):Key、Data、Mode。其中Key為8個(gè)字節(jié)共64位,是DES算法的工作密鑰;Data也為8個(gè)字節(jié)64位,是要被加密或被解密的數(shù)據(jù);Mode為DES的工作方式,有兩種:加密或解密。


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