JAVA文件加密

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VERSION 4.00

Begin VB.Form Form1

Caption = "Sample"

ClientHeight = 705

ClientLeft = 3915

ClientTop = 3315

ClientWidth = 1800

ControlBox = 0 'False

Height = 1110

Left = 3855

LinkTopic = "Form1"

MaxButton = 0 'False

MinButton = 0 'False

ScaleHeight = 705

ScaleWidth = 1800

Top = 2970

Width = 1920

Begin VB.CommandButton Command1

Caption = "Command1"

Height = 495

Left = 240

TabIndex = 0

Top = 120

Width = 1215

End

End

Attribute VB_Name = "Form1"

Attribute VB_Creatable = False

Attribute VB_Exposed = False

Sub FileEncodeAndDecode(InputFile As String, OutputFile As String, PasswordKey As String)

Dim temp As Single

Dim Char As String * 1

Dim XORMask As Single

Dim temp1 As Integer

Open InputFile For Binary As #1

Open OutputFile For Binary As #2

For x = 1 To Len(PasswordKey)

temp = Asc(Mid$(PasswordKey, x, 1))

For y = 1 To temp

temp1 = Rnd

Next y

' Re-seed to throw off prying eyes

Randomize temp1

Next x

Counter = 0

For z = 1 To FileLen(InputFile)

'Generate random mask

XORMask = Int(Rnd * 256)

'Get the char change it

Get 1, , Char

Char = Chr$((Asc(Char) Xor XORMask))

Put 2, , Char

Counter = Counter + 1

If Counter Len(PasswordKey) Then Counter = 1

' Pull random numbers from the hat

For x = 1 To (Asc(Mid$(PasswordKey, Counter, 1)) * 2)

temp = Rnd

Next x

Next z

Close #1

Close #2

End Sub

Private Sub Command1_Click()

Dim InputFile As String

Dim OutputFile As String

Dim PasswordKey As String

InputFile = InputBox("Enter a filename to encode")

OutputFile = InputBox("Enter the new filename this will become ")

PasswordKey = InputBox("Enter the password (key)")

Call FileEncodeAndDecode(InputFile, OutputFile, PasswordKey)

MsgBox "File written to " + OutputFile

End

End Sub

Private Sub Form_Load()

Command1.Caption = "Code/Decode"

End Sub

Form=enc-dec.frm

Reference=*\G{BEF6E001-A874-101A-8BBA-00AA00300CAB}#2.0#0#D:\WINDOWS\SYSTEM\OLEPRO32.DLL#Standard OLE Types

Reference=*\G{00025E01-0000-0000-C000-000000000046}#3.0#0#D:\PROGRAM FILES\COMMON FILES\MICROSOFT SHARED\DD:\PROGRAM FIL#Microsoft DAO 3.0 Object Library

ProjWinSize=113,438,221,107

ProjWinShow=2

Name="Project1"

HelpContextID="0"

StartMode=0

VersionCompatible32="0"

MajorVer=1

MinorVer=0

RevisionVer=0

AutoIncrementVer=0

ServerSupportFiles=0

VersionCompanyName="Southern Cross Software"

JAVA简单文件加密 求JAVA源代码

md5加密：

package com.ncs.pki.util;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

public class MD5Test {

private static MessageDigest digest = null;

public synchronized static final String hash(String data) {

if (digest == null) {

try {

digest = MessageDigest.getInstance("MD5");

} catch (NoSuchAlgorithmException nsae) {

System.err.println(

"Failed to load the MD5 MessageDigest. "

+ "Jive will be unable to function normally.");

nsae.printStackTrace();

}

}

// Now, compute hash.

digest.update(data.getBytes());

return encodeHex(digest.digest());

}

public static final String encodeHex(byte[] bytes) {

StringBuffer buf = new StringBuffer(bytes.length * 2);

int i;

for (i = 0; i bytes.length; i++) {

if (((int) bytes[i] 0xff) 0x10) {

buf.append("0");

}

buf.append(Long.toString((int) bytes[i] 0xff, 16));

}

return buf.toString();

}

public static String test(){

return null;

}

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

System.out.println(MD5Test.hash("123456"));

}

}

3des加密：

package com.ncs.pki.util;

import java.security.Key;

import java.security.SecureRandom;

import javax.crypto.Cipher;

import javax.crypto.KeyGenerator;

import sun.misc.BASE64Decoder;

import sun.misc.BASE64Encoder;

public class DesEncrypt {

/**

*

* 使用DES加密与解密,可对byte[],String类型进行加密与解密 密文可使用String,byte[]存储.

*

* 方法: void getKey(String strKey)从strKey的字条生成一个Key

*

* String getEncString(String strMing)对strMing进行加密,返回String密文 String

* getDesString(String strMi)对strMin进行解密,返回String明文

*

*byte[] getEncCode(byte[] byteS)byte[]型的加密 byte[] getDesCode(byte[]

* byteD)byte[]型的解密

*/

Key key;

/**

* 根据参数生成KEY

*

* @param strKey

*/

public void getKey(String strKey) {

try {

KeyGenerator _generator = KeyGenerator.getInstance("DES");

_generator.init(new SecureRandom(strKey.getBytes()));

this.key = _generator.generateKey();

_generator = null;

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 加密String明文输入,String密文输出

*

* @param strMing

* @return

*/

public String getEncString(String strMing) {

byte[] byteMi = null;

byte[] byteMing = null;

String strMi = "";

BASE64Encoder base64en = new BASE64Encoder();

try {

byteMing = strMing.getBytes("UTF8");

byteMi = this.getEncCode(byteMing);

strMi = base64en.encode(byteMi);

} catch (Exception e) {

e.printStackTrace();

} finally {

base64en = null;

byteMing = null;

byteMi = null;

}

return strMi;

}

/**

* 解密 以String密文输入,String明文输出

*

* @param strMi

* @return

*/

public String getDesString(String strMi) {

BASE64Decoder base64De = new BASE64Decoder();

byte[] byteMing = null;

byte[] byteMi = null;

String strMing = "";

try {

byteMi = base64De.decodeBuffer(strMi);

byteMing = this.getDesCode(byteMi);

strMing = new String(byteMing, "UTF8");

} catch (Exception e) {

e.printStackTrace();

} finally {

base64De = null;

byteMing = null;

byteMi = null;

}

return strMing;

}

/**

* 加密以byte[]明文输入,byte[]密文输出

*

* @param byteS

* @return

*/

private byte[] getEncCode(byte[] byteS) {

byte[] byteFina = null;

Cipher cipher;

try {

cipher = Cipher.getInstance("DES");

cipher.init(Cipher.ENCRYPT_MODE, key);

byteFina = cipher.doFinal(byteS);

} catch (Exception e) {

e.printStackTrace();

} finally {

cipher = null;

}

return byteFina;

}

/**

* 解密以byte[]密文输入,以byte[]明文输出

*

* @param byteD

* @return

*/

private byte[] getDesCode(byte[] byteD) {

Cipher cipher;

byte[] byteFina = null;

try {

cipher = Cipher.getInstance("DES");

cipher.init(Cipher.DECRYPT_MODE, key);

byteFina = cipher.doFinal(byteD);

} catch (Exception e) {

e.printStackTrace();

} finally {

cipher = null;

}

return byteFina;

}

public static void main(String[] args) {

System.out.println("des demo");

DesEncrypt des = new DesEncrypt();// 实例化一个对像

des.getKey("MYKEY");// 生成密匙

System.out.println("key=MYKEY");

String strEnc = des.getEncString("111111");// 加密字符串,返回String的密文

System.out.println("密文=" + strEnc);

String strDes = des.getDesString(strEnc);// 把String 类型的密文解密

System.out.println("明文=" + strDes);

}

}

谁能提供下java中有关加密和解密的代码

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)));  

}

运行结果：

由于代码太多，可到  itxxz.com/a/javashili/2014/1217/encrypt_decrypt.html  查看，注释也比较完整，清晰易懂

Java中用Base64编程的文件批量加密解密工具程序代码

/** * 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); }

用java写个文件加密的代码该怎么写

最简单的就一个FOR循环要加密的文件 再声明一个字符串 遍历 要加密的文件和字符串进行位与操作或之类操作

类似这样-

import java.util.Arrays;

public class Test {

public static void main(String[] args) {

String str = "hello";

byte[] strCode = str.getBytes();

System.out.println("原始信息字节码："+Arrays.toString(strCode));

String key = "abcde";

byte[] keyCode = key.getBytes();

System.out.println("密钥字节码："+Arrays.toString(keyCode));

byte[] finallyCode = new byte[strCode.length];

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

finallyCode[i] = (byte) (strCode[i] ^ keyCode[i]);

}

System.out.println("加密后的字节码："+Arrays.toString(finallyCode));

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

//============解密

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

finallyCode[i] = (byte) (finallyCode[i] ^ keyCode[i]);

}

System.out.println("解密后的字节码："+Arrays.toString(finallyCode));

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

}

}