jsp源碼加密
❶ 在JSP中如何實現MD5加密
在JSP中如何實現MD5加密
源碼
/**
* 類名： MD5Digest<br>
* 說明： 用來進行密碼加密的md5公用參數<br>
* 編寫日期： 2001/03/05<br>
* 修改者： <br>
* 修改信息： <br>
* @author edgarlo [email protected]
* @version 1.0<br>
*/
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Digest
{
private MessageDigest __md5 = null;
private StringBuffer __digestBuffer = null;
public MD5Digest()
throws NoSuchAlgorithmException
{
__md5 = MessageDigest.getInstance("MD5");
__digestBuffer = new StringBuffer();
}
public String md5crypt(String s)
{
__digestBuffer.setLength(0);
byte abyte0[] = __md5.digest(s.getBytes());
for(int i = 0; i < abyte0.length; i++)
__digestBuffer.append(toHex(abyte0));
return __digestBuffer.toString();
}
public String toHex(byte one){
String HEX="0123456789ABCDEF";
char[] result=new char[2];
result[0]=HEX.charAt((one & 0xf0) >> 4);
result[1]=HEX.charAt(one & 0x0f);
String mm=new String(result);
return mm;
}
}
--------------------------------------------------------------------------------
/************************************************
MD5 演算法的Java Bean
@author:Topcat Tuppin
Last Modified:10,Mar,2001
*************************************************/
package beartool;
import java.lang.reflect.*;
/*************************************************
md5 類實現了RSA Data Security, Inc.在提交給IETF
的RFC1321中的MD5 message-digest 演算法。
*************************************************/
public class MD5 {
/* 下面這些S11-S44實際上是一個4*4的矩陣，在原始的C實現中是用#define 實現的，
這里把它們實現成為static final是表示了只讀，切能在同一個進程空間內的多個
Instance間共享*/
static final int S11 = 7;
static final int S12 = 12;
static final int S13 = 17;
static final int S14 = 22;
static final int S21 = 5;
static final int S22 = 9;
static final int S23 = 14;
static final int S24 = 20;
static final int S31 = 4;
static final int S32 = 11;
static final int S33 = 16;
static final int S34 = 23;
static final int S41 = 6;
static final int S42 = 10;
static final int S43 = 15;
static final int S44 = 21;
static final byte[] PADDING = { -128, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
/* 下面的三個成員是MD5計算過程中用到的3個核心數據，在原始的C實現中
被定義到MD5_CTX結構中
*/
private long[] state = new long[4]; // state (ABCD)
private long[] count = new long[2]; // number of bits, molo 2^64 (lsb first)
private byte[] buffer = new byte[64]; // input buffer
/* digestHexStr是MD5的唯一一個公共成員，是最新一次計算結果的
16進制ASCII表示.
*/
public String digestHexStr;
/* digest,是最新一次計算結果的2進制內部表示，表示128bit的MD5值.
*/
private byte[] digest = new byte[16];
/*
getMD5ofStr是類MD5最主要的公共方法，入口參數是你想要進行MD5變換的字元串
返回的是變換完的結果，這個結果是從公共成員digestHexStr取得的．
*/
public String getMD5ofStr(String inbuf) {
md5Init();
md5Update(inbuf.getBytes(), inbuf.length());
md5Final();
digestHexStr = "";
for (int i = 0; i < 16; i++) {
digestHexStr += byteHEX(digest);
}
return digestHexStr;
}
// 這是MD5這個類的標准構造函數，JavaBean要求有一個public的並且沒有參數的構造函數
public MD5() {
md5Init();
return;
}
/* md5Init是一個初始化函數，初始化核心變數，裝入標準的幻數 */
private void md5Init() {
count[0] = 0L;
count[1] = 0L;
///* Load magic initialization constants.
state[0] = 0x67452301L;
state[1] = 0xefcdab89L;
state[2] = 0x98badcfeL;
state[3] = 0x10325476L;
return;
}
/* F, G, H ,I 是4個基本的MD5函數，在原始的MD5的C實現中，由於它們是
簡單的位運算，可能出於效率的考慮把它們實現成了宏，在java中，我們把它們
實現成了private方法，名字保持了原來C中的。 */
private long F(long x, long y, long z) {
return (x & y) | ((~x) & z);
}
private long G(long x, long y, long z) {
return (x & z) | (y & (~z));
}
private long H(long x, long y, long z) {
return x ^ y ^ z;
}
private long I(long x, long y, long z) {
return y ^ (x | (~z));
}
/*
FF,GG,HH和II將調用F,G,H,I進行近一步變換
FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
private long FF(long a, long b, long c, long d, long x, long s,
long ac) {
a += F (b, c, d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long GG(long a, long b, long c, long d, long x, long s,
long ac) {
a += G (b, c, d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long HH(long a, long b, long c, long d, long x, long s,
long ac) {
a += H (b, c, d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long II(long a, long b, long c, long d, long x, long s,
long ac) {
a += I (b, c, d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
/*
md5Update是MD5的主計算過程，inbuf是要變換的位元組串，inputlen是長度，這個
函數由getMD5ofStr調用，調用之前需要調用md5init，因此把它設計成private的
*/
private void md5Update(byte[] inbuf, int inputLen) {
int i, index, partLen;
byte[] block = new byte[64];
index = (int)(count[0] >>> 3) & 0x3F;
// /* Update number of bits */
if ((count[0] += (inputLen << 3)) < (inputLen << 3))
count[1]++;
count[1] += (inputLen >>> 29);
partLen = 64 - index;
// Transform as many times as possible.
if (inputLen >= partLen) {
md5Memcpy(buffer, inbuf, index, 0, partLen);
md5Transform(buffer);
for (i = partLen; i + 63 < inputLen; i += 64) {
md5Memcpy(block, inbuf, 0, i, 64);
md5Transform (block);
}
index = 0;
} else
i = 0;
///* Buffer remaining input */
md5Memcpy(buffer, inbuf, index, i, inputLen - i);
}
/*
md5Final整理和填寫輸出結果
*/
private void md5Final () {
byte[] bits = new byte[8];
int index, padLen;
///* Save number of bits */
Encode (bits, count, 8);
///* Pad out to 56 mod 64.
index = (int)(count[0] >>> 3) & 0x3f;
padLen = (index < 56) ? (56 - index) : (120 - index);
md5Update (PADDING, padLen);
///* Append length (before padding) */
md5Update(bits, 8);
///* Store state in digest */
Encode (digest, state, 16);
}
/* md5Memcpy是一個內部使用的byte數組的塊拷貝函數，從input的inpos開始把len長度的
位元組拷貝到output的outpos位置開始
*/
private void md5Memcpy (byte[] output, byte[] input,
int outpos, int inpos, int len)
{
int i;
for (i = 0; i < len; i++)
output[outpos + i] = input[inpos + i];
}
/*
md5Transform是MD5核心變換程序，有md5Update調用，block是分塊的原始位元組
*/
private void md5Transform (byte block[]) {
long a = state[0], b = state[1], c = state[2], d = state[3];
long[] x = new long[16];
Decode (x, block, 64);
/* Round 1 */
a = FF (a, b, c, d, x[0], S11, 0xd76aa478L); /* 1 */
d = FF (d, a, b, c, x[1], S12, 0xe8c7b756L); /* 2 */
c = FF (c, d, a, b, x[2], S13, 0x242070dbL); /* 3 */
b = FF (b, c, d, a, x[3], S14, 0xc1bdceeeL); /* 4 */
a = FF (a, b, c, d, x[4], S11, 0xf57c0fafL); /* 5 */
d = FF (d, a, b, c, x[5], S12, 0x4787c62aL); /* 6 */
c = FF (c, d, a, b, x[6], S13, 0xa8304613L); /* 7 */
b = FF (b, c, d, a, x[7], S14, 0xfd469501L); /* 8 */
a = FF (a, b, c, d, x[8], S11, 0x698098d8L); /* 9 */
d = FF (d, a, b, c, x[9], S12, 0x8b44f7afL); /* 10 */
c = FF (c, d, a, b, x[10], S13, 0xffff5bb1L); /* 11 */
b = FF (b, c, d, a, x[11], S14, 0x895cd7beL); /* 12 */
a = FF (a, b, c, d, x[12], S11, 0x6b901122L); /* 13 */
d = FF (d, a, b, c, x[13], S12, 0xfd987193L); /* 14 */
c = FF (c, d, a, b, x[14], S13, 0xa679438eL); /* 15 */
b = FF (b, c, d, a, x[15], S14, 0x49b40821L); /* 16 */
/* Round 2 */
a = GG (a, b, c, d, x[1], S21, 0xf61e2562L); /* 17 */
d = GG (d, a, b, c, x[6], S22, 0xc040b340L); /* 18 */
c = GG (c, d, a, b, x[11], S23, 0x265e5a51L); /* 19 */
b = GG (b, c, d, a, x[0], S24, 0xe9b6c7aaL); /* 20 */
a = GG (a, b, c, d, x[5], S21, 0xd62f105dL); /* 21 */
d = GG (d, a, b, c, x[10], S22, 0x2441453L); /* 22 */
c = GG (c, d, a, b, x[15], S23, 0xd8a1e681L); /* 23 */
b = GG (b, c, d, a, x[4], S24, 0xe7d3fbc8L); /* 24 */
a = GG (a, b, c, d, x[9], S21, 0x21e1cde6L); /* 25 */
d = GG (d, a, b, c, x[14], S22, 0xc33707d6L); /* 26 */
c = GG (c, d, a, b, x[3], S23, 0xf4d50d87L); /* 27 */
b = GG (b, c, d, a, x[8], S24, 0x455a14edL); /* 28 */
a = GG (a, b, c, d, x[13], S21, 0xa9e3e905L); /* 29 */
d = GG (d, a, b, c, x[2], S22, 0xfcefa3f8L); /* 30 */
c = GG (c, d, a, b, x[7], S23, 0x676f02d9L); /* 31 */
b = GG (b, c, d, a, x[12], S24, 0x8d2a4c8aL); /* 32 */
/* Round 3 */
a = HH (a, b, c, d, x[5], S31, 0xfffa3942L); /* 33 */
d = HH (d, a, b, c, x[8], S32, 0x8771f681L); /* 34 */
c = HH (c, d, a, b, x[11], S33, 0x6d9d6122L); /* 35 */
b = HH (b, c, d, a, x[14], S34, 0xfde5380cL); /* 36 */
a = HH (a, b, c, d, x[1], S31, 0xa4beea44L); /* 37 */
d = HH (d, a, b, c, x[4], S32, 0x4bdecfa9L); /* 38 */
c = HH (c, d, a, b, x[7], S33, 0xf6bb4b60L); /* 39 */
b = HH (b, c, d, a, x[10], S34, 0xbebfbc70L); /* 40 */
a = HH (a, b, c, d, x[13], S31, 0x289b7ec6L); /* 41 */
d = HH (d, a, b, c, x[0], S32, 0xeaa127faL); /* 42 */
c = HH (c, d, a, b, x[3], S33, 0xd4ef3085L); /* 43 */
b = HH (b, c, d, a, x[6], S34, 0x4881d05L); /* 44 */
a = HH (a, b, c, d, x[9], S31, 0xd9d4d039L); /* 45 */
d = HH (d, a, b, c, x[12], S32, 0xe6db99e5L); /* 46 */
c = HH (c, d, a, b, x[15], S33, 0x1fa27cf8L); /* 47 */
b = HH (b, c, d, a, x[2], S34, 0xc4ac5665L); /* 48 */
/* Round 4 */
a = II (a, b, c, d, x[0], S41, 0xf4292244L); /* 49 */
d = II (d, a, b, c, x[7], S42, 0x432aff97L); /* 50 */
c = II (c, d, a, b, x[14], S43, 0xab9423a7L); /* 51 */
b = II (b, c, d, a, x[5], S44, 0xfc93a039L); /* 52 */
a = II (a, b, c, d, x[12], S41, 0x655b59c3L); /* 53 */
d = II (d, a, b, c, x[3], S42, 0x8f0ccc92L); /* 54 */
c = II (c, d, a, b, x[10], S43, 0xffeff47dL); /* 55 */
b = II (b, c, d, a, x[1], S44, 0x85845dd1L); /* 56 */
a = II (a, b, c, d, x[8], S41, 0x6fa87e4fL); /* 57 */
d = II (d, a, b, c, x[15], S42, 0xfe2ce6e0L); /* 58 */
c = II (c, d, a, b, x[6], S43, 0xa3014314L); /* 59 */
b = II (b, c, d, a, x[13], S44, 0x4e0811a1L); /* 60 */
a = II (a, b, c, d, x[4], S41, 0xf7537e82L); /* 61 */
d = II (d, a, b, c, x[11], S42, 0xbd3af235L); /* 62 */
c = II (c, d, a, b, x[2], S43, 0x2ad7d2bbL); /* 63 */
b = II (b, c, d, a, x[9], S44, 0xeb86d391L); /* 64 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
}
/*Encode把long數組按順序拆成byte數組，因為java的long類型是64bit的，
只拆低32bit，以適應原始C實現的用途
*/
private void Encode (byte[] output, long[] input, int len) {
int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) {
output[j] = (byte)(input & 0xffL);
output[j + 1] = (byte)((input >>> 8) & 0xffL);
output[j + 2] = (byte)((input >>> 16) & 0xffL);
output[j + 3] = (byte)((input >>> 24) & 0xffL);
}
}
/*Decode把byte數組按順序合成成long數組，因為java的long類型是64bit的，
只合成低32bit，高32bit清零，以適應原始C實現的用途
*/
private void Decode (long[] output, byte[] input, int len) {
int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
output = b2iu(input[j]) |
(b2iu(input[j + 1]) << 8) |
(b2iu(input[j + 2]) << 16) |
(b2iu(input[j + 3]) << 24);
return;
}
/*
b2iu是我寫的一個把byte按照不考慮正負號的原則的」升位」程序，因為java沒有unsigned運算
*/
public static long b2iu(byte b) {
return b < 0 ? b & 0x7F + 128 : b;
}
/*byteHEX()，用來把一個byte類型的數轉換成十六進制的ASCII表示，
因為java中的byte的toString無法實現這一點，我們又沒有C語言中的
sprintf(outbuf,"%02X",ib)
*/
public static String byteHEX(byte ib) {
char[] Digit = { '0','1','2','3','4','5','6','7','8','9',
'A','B','C','D','E','F' };
char [] ob = new char[2];
ob[0] = Digit[(ib >>> 4) & 0X0F];
ob[1] = Digit[ib & 0X0F];
String s = new String(ob);
return s;
}
public static void main(String args[]) {
MD5 m = new MD5();
if (Array.getLength(args) == 0) { //如果沒有參數，執行標準的Test Suite
System.out.println("MD5 Test suite:");
System.out.println("MD5(\"\"):"+m.getMD5ofStr(""));
System.out.println("MD5(\"a\"):"+m.getMD5ofStr("a"));
System.out.println("MD5(\"abc\"):"+m.getMD5ofStr("abc"));
System.out.println("MD5(\"message digest\"):"+m.getMD5ofStr("message digest"));
System.out.println("MD5(\"abcdefghijklmnopqrstuvwxyz\"):"+
m.getMD5ofStr("abcdefghijklmnopqrstuvwxyz"));
System.out.println("MD5(\"\"):"+
m.getMD5ofStr(""));
}
else
System.out.println("MD5(" + args[0] + ")=" + m.getMD5ofStr(args[0]));
}
}
JSP中的使用方法
-------------------------------------------------------------------------------
<%@ page language='java' %>
<jsp:useBean id='oMD5' scope='request' class='beartool.MD5'/>
<%@ page import='java.util.*'%>
<%@ page import='java.sql.*'%>
<html>
<body>
<%
String userid = request.getParameter("UserID"); //獲取用戶輸入UserID
String password = request.getParameter("Password"); //獲取用戶輸入的Password
String pwdmd5 = oMD5.getMD5ofStr(password); //計算MD5的值
PrintWriter rp = response.getWriter();
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:community", "", "");
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("select * from users where userID ='"+userid+"' and pwdmd5= '" + pwdmd5+"'" );
if (rs.next())
{
rp.print("Login OK");
}
else
{
rp.print("Login Fail");
}
stmt.close();
con.close();
%>
</body>
</html>
具體我也不太清楚..
可以去 www.xuebc.com 找下
原文地址:http://www.xuebc.com/read.php?tid=434
❷ jsp怎麼使用MD5加密數據
jsp端實現md5加密就是jsp的java段代碼來實現的，引入md5加密類，然後調用該類相應的方法就ok了，如果是輸出的時候要注意的是別轉換為字元串，如果jdk5.0以上的話
System.out.printf("%x",「加密過的變數」);
out.printf("%x",「加密過的變數」);
❸ jsp中怎麼實現MD5加密
寫編寫一個MD5加密工具類
通過import方式將MD5加密工具類引入到jsp中，然後使用MD5工具類進行加密
下面是MD5加密工具類代碼
importjava.security.MessageDigest;
publicclassMD5Util{
(byteb[]){
StringBufferresultSb=newStringBuffer();
for(inti=0;i<b.length;i++)
resultSb.append(byteToHexString(b[i]));
returnresultSb.toString();
}
(byteb){
intn=b;
if(n<0)
n+=256;
intd1=n/16;
intd2=n%16;
returnhexDigits[d1]+hexDigits[d2];
}
publicstaticStringMD5Encode(Stringorigin,Stringcharsetname){
StringresultString=null;
try{
resultString=newString(origin);
MessageDigestmd=MessageDigest.getInstance("MD5");
if(charsetname==null||"".equals(charsetname))
resultString=byteArrayToHexString(md.digest(resultString
.getBytes()));
else
resultString=byteArrayToHexString(md.digest(resultString
.getBytes(charsetname)));
}catch(Exceptionexception){
}
returnresultString;
}
[]={"0","1","2","3","4","5",
"6","7","8","9","a","b","c","d","e","f"};
publicstaticvoidmain(String[]args){
Strings="appid=wxc7dac6b76548e969&attach=106&auth_code=130099732281083883&body=醫泰天下遠程會診-20161019162200QCVV&mch_id=1393510702&nonce_str=&out_trade_no=20161019162200QCVV&time_expire=20161028192424&time_start=20161028182424&total_fee=1&key=";
System.out.println(MD5Encode(s,null));
}
}
❹ 如何實現jsp的url加密
加密參數是jsp參數傳遞中的一種安全措施，加密方法如下：
建議使用對稱加密如：DES或者是PBE演算法。
加密演算法如下：
public static String encrypt(String key, String plainText) throws Exception {
String encryptTxt = "";
try {
byte[] salt = new byte[8];
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(key.getBytes());
byte[] digest = md.digest();
for (int i = 0; i < 8; i++) {
salt[i] = digest[i];
}
PBEKeySpec pbeKeySpec = new PBEKeySpec(key.toCharArray());
SecretKeyFactory keyFactory = SecretKeyFactory
.getInstance("PBEWithMD5AndDES");
SecretKey skey = keyFactory.generateSecret(pbeKeySpec);
PBEParameterSpec paramSpec = new PBEParameterSpec(salt, ITERATIONS);
Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
cipher.init(Cipher.ENCRYPT_MODE, skey, paramSpec);
byte[] cipherText = cipher.doFinal(plainText.getBytes());
String saltString = new String(Base64.encode(salt));
String ciphertextString = new String(Base64.encode(cipherText));
return saltString + ciphertextString;
} catch (Exception e) {
throw new Exception("Encrypt Text Error:" + e.getMessage(), e);
}
使用方法：
把jsp?後面的參數作為參數傳入encrypt();然後就可以返回加密串了。
❺ jsp中如何對數據進行加密
/**
* 類名： MD5Digest<br>
* 說明： 用來進行密碼加密的md5公用參數<br>
* 編寫日期： 2001/03/05<br>
* 修改者： <br>
* 修改信息： <br>
* @author edgarlo [email protected]
* @version 1.0<br>
*/
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Digest
{
private MessageDigest __md5 = null;
private StringBuffer __digestBuffer = null;
public MD5Digest()
throws NoSuchAlgorithmException
{
__md5 = MessageDigest.getInstance("MD5");
__digestBuffer = new StringBuffer();
}
public String md5crypt(String s)
{
__digestBuffer.setLength(0);
byte abyte0[] = __md5.digest(s.getBytes());
for(int i = 0; i < abyte0.length; i++)
__digestBuffer.append(toHex(abyte0[i]));
return __digestBuffer.toString();
}
public String toHex(byte one){
String HEX="0123456789ABCDEF";
char[] result=new char[2];
result[0]=HEX.charAt((one & 0xf0) >> 4);
result[1]=HEX.charAt(one & 0x0f);
String mm=new String(result);
return mm;
}
}
❻ JSP用戶密碼加密
這是MD5類的代碼 package Public; //指定類所在的包import java.lang.reflect.Array;public class MD5
{ static final int S11 = 7;
static final int S12 = 12;
static final int S13 = 17;
static final int S14 = 22;
static final int S21 = 5;
static final int S22 = 9;
static final int S23 = 14;
static final int S24 = 20;
static final int S31 = 4;
static final int S32 = 11;
static final int S33 = 16;
static final int S34 = 23;
static final int S41 = 6;
static final int S42 = 10;
static final int S43 = 15;
static final int S44 = 21;
static final byte PADDING[] = {
-128, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0
};
private long state[];
private long count[];
private byte buffer[];
public String digestHexStr;
private byte digest[]; public MD5()
{
state = new long[4];
count = new long[2];
buffer = new byte[64];
digest = new byte[16];
md5Init();
} private void Decode(long al[], byte abyte0[], int i)
{
int j = 0;
for(int k = 0; k < i; k += 4)
{
al[j] = b2iu(abyte0[k]) | b2iu(abyte0[k + 1]) << 8 | b2iu(abyte0[k + 2]) << 16 | b2iu(abyte0[k + 3]) << 24;
j++;
} } private void Encode(byte abyte0[], long al[], int i)
{
int j = 0;
for(int k = 0; k < i; k += 4)
{
abyte0[k] = (byte)(int)(al[j] & 255L);
abyte0[k + 1] = (byte)(int)(al[j] >>> 8 & 255L);
abyte0[k + 2] = (byte)(int)(al[j] >>> 16 & 255L);
abyte0[k + 3] = (byte)(int)(al[j] >>> 24 & 255L);
j++;
} } private long F(long l, long l1, long l2)
{
return l & l1 | ~l & l2;
} private long FF(long l, long l1, long l2, long l3, long l4, long l5, long l6)
{
l += F(l1, l2, l3) + l4 + l6;
l = (int)l << (int)l5 | (int)l >>> (int)(32L - l5);
l += l1;
return l;
} private long G(long l, long l1, long l2)
{
return l & l2 | l1 & ~l2;
} private long GG(long l, long l1, long l2, long l3, long l4, long l5, long l6)
{
l += G(l1, l2, l3) + l4 + l6;
l = (int)l << (int)l5 | (int)l >>> (int)(32L - l5);
l += l1;
return l;
} private long H(long l, long l1, long l2)
{
return l ^ l1 ^ l2;
} private long HH(long l, long l1, long l2, long l3, long l4, long l5, long l6)
{
l += H(l1, l2, l3) + l4 + l6;
l = (int)l << (int)l5 | (int)l >>> (int)(32L - l5);
l += l1;
return l;
} private long I(long l, long l1, long l2)
{
return l1 ^ (l | ~l2);
} private long II(long l, long l1, long l2, long l3, long l4, long l5, long l6)
{
l += I(l1, l2, l3) + l4 + l6;
l = (int)l << (int)l5 | (int)l >>> (int)(32L - l5);
l += l1;
return l;
} public static long b2iu(byte byte0)
{
return (long)(byte0 >= 0 ? byte0 : byte0 & 0xff);
} public static String byteHEX(byte byte0)
{
char ac[] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F'
};
char ac1[] = new char[2];
ac1[0] = ac[byte0 >>> 4 & 0xf];
ac1[1] = ac[byte0 & 0xf];
String s = new String(ac1);
return s;
} public String getMD5ofStr(String s)
{
md5Init();
md5Update(s.getBytes(), s.length());
md5Final();
digestHexStr = "";
for(int i = 0; i < 16; i++)
digestHexStr += byteHEX(digest[i]); return digestHexStr;
} public static void main(String args[])
{
MD5 md5 = new MD5();
if(Array.getLength(args) == 0)
{
System.out.println("MD5 Test suite:");
System.out.println("MD5(\"123456\"):" + md5.getMD5ofStr("123456"));
System.out.println("MD5(\"abcdefghijklmnopqrstuvwxyz\"):" + md5.getMD5ofStr("abcdefghijklmnopqrstuvwxyz"));
System.out.println("MD5(\"\"):" + md5.getMD5ofStr(""));
} else
{
System.out.println("MD5(" + args[0] + ")=" + md5.getMD5ofStr(args[0]));
}
} private void md5Final()
{
byte abyte0[] = new byte[8];
Encode(abyte0, count, 8);
int i = (int)(count[0] >>> 3) & 0x3f;
int j = i >= 56 ? 120 - i : 56 - i;
md5Update(PADDING, j);
md5Update(abyte0, 8);
Encode(digest, state, 16);
} private void md5Init()
{
count[0] = 0L;
count[1] = 0L;
state[0] = 0x67452301L;
state[1] = 0xefcdab89L;
state[2] = 0x98badcfeL;
state[3] = 0x10325476L;
} private void md5Memcpy(byte abyte0[], byte abyte1[], int i, int j, int k)
{
for(int l = 0; l < k; l++)
abyte0[i + l] = abyte1[j + l]; } private void md5Transform(byte abyte0[])
{
long l = state[0];
long l1 = state[1];
long l2 = state[2];
long l3 = state[3];
long al[] = new long[16];
Decode(al, abyte0, 64);
l = FF(l, l1, l2, l3, al[0], 7L, 0xd76aa478L);
l3 = FF(l3, l, l1, l2, al[1], 12L, 0xe8c7b756L);
l2 = FF(l2, l3, l, l1, al[2], 17L, 0x242070dbL);
l1 = FF(l1, l2, l3, l, al[3], 22L, 0xc1bdceeeL);
l = FF(l, l1, l2, l3, al[4], 7L, 0xf57c0fafL);
l3 = FF(l3, l, l1, l2, al[5], 12L, 0x4787c62aL);
l2 = FF(l2, l3, l, l1, al[6], 17L, 0xa8304613L);
l1 = FF(l1, l2, l3, l, al[7], 22L, 0xfd469501L);
l = FF(l, l1, l2, l3, al[8], 7L, 0x698098d8L);
l3 = FF(l3, l, l1, l2, al[9], 12L, 0x8b44f7afL);
l2 = FF(l2, l3, l, l1, al[10], 17L, 0xffff5bb1L);
l1 = FF(l1, l2, l3, l, al[11], 22L, 0x895cd7beL);
l = FF(l, l1, l2, l3, al[12], 7L, 0x6b901122L);
l3 = FF(l3, l, l1, l2, al[13], 12L, 0xfd987193L);
l2 = FF(l2, l3, l, l1, al[14], 17L, 0xa679438eL);
l1 = FF(l1, l2, l3, l, al[15], 22L, 0x49b40821L);
l = GG(l, l1, l2, l3, al[1], 5L, 0xf61e2562L);
l3 = GG(l3, l, l1, l2, al[6], 9L, 0xc040b340L);
l2 = GG(l2, l3, l, l1, al[11], 14L, 0x265e5a51L);
l1 = GG(l1, l2, l3, l, al[0], 20L, 0xe9b6c7aaL);
l = GG(l, l1, l2, l3, al[5], 5L, 0xd62f105dL);
l3 = GG(l3, l, l1, l2, al[10], 9L, 0x2441453L);
l2 = GG(l2, l3, l, l1, al[15], 14L, 0xd8a1e681L);
l1 = GG(l1, l2, l3, l, al[4], 20L, 0xe7d3fbc8L);
l = GG(l, l1, l2, l3, al[9], 5L, 0x21e1cde6L);
l3 = GG(l3, l, l1, l2, al[14], 9L, 0xc33707d6L);
l2 = GG(l2, l3, l, l1, al[3], 14L, 0xf4d50d87L);
l1 = GG(l1, l2, l3, l, al[8], 20L, 0x455a14edL);
l = GG(l, l1, l2, l3, al[13], 5L, 0xa9e3e905L);
l3 = GG(l3, l, l1, l2, al[2], 9L, 0xfcefa3f8L);
l2 = GG(l2, l3, l, l1, al[7], 14L, 0x676f02d9L);
l1 = GG(l1, l2, l3, l, al[12], 20L, 0x8d2a4c8aL);
l = HH(l, l1, l2, l3, al[5], 4L, 0xfffa3942L);
l3 = HH(l3, l, l1, l2, al[8], 11L, 0x8771f681L);
l2 = HH(l2, l3, l, l1, al[11], 16L, 0x6d9d6122L);
l1 = HH(l1, l2, l3, l, al[14], 23L, 0xfde5380cL);
l = HH(l, l1, l2, l3, al[1], 4L, 0xa4beea44L);
l3 = HH(l3, l, l1, l2, al[4], 11L, 0x4bdecfa9L);
l2 = HH(l2, l3, l, l1, al[7], 16L, 0xf6bb4b60L);
l1 = HH(l1, l2, l3, l, al[10], 23L, 0xbebfbc70L);
l = HH(l, l1, l2, l3, al[13], 4L, 0x289b7ec6L);
l3 = HH(l3, l, l1, l2, al[0], 11L, 0xeaa127faL);
l2 = HH(l2, l3, l, l1, al[3], 16L, 0xd4ef3085L);
l1 = HH(l1, l2, l3, l, al[6], 23L, 0x4881d05L);
l = HH(l, l1, l2, l3, al[9], 4L, 0xd9d4d039L);
l3 = HH(l3, l, l1, l2, al[12], 11L, 0xe6db99e5L);
l2 = HH(l2, l3, l, l1, al[15], 16L, 0x1fa27cf8L);
l1 = HH(l1, l2, l3, l, al[2], 23L, 0xc4ac5665L);
l = II(l, l1, l2, l3, al[0], 6L, 0xf4292244L);
l3 = II(l3, l, l1, l2, al[7], 10L, 0x432aff97L);
l2 = II(l2, l3, l, l1, al[14], 15L, 0xab9423a7L);
l1 = II(l1, l2, l3, l, al[5], 21L, 0xfc93a039L);
l = II(l, l1, l2, l3, al[12], 6L, 0x655b59c3L);
l3 = II(l3, l, l1, l2, al[3], 10L, 0x8f0ccc92L);
l2 = II(l2, l3, l, l1, al[10], 15L, 0xffeff47dL);
l1 = II(l1, l2, l3, l, al[1], 21L, 0x85845dd1L);
l = II(l, l1, l2, l3, al[8], 6L, 0x6fa87e4fL);
l3 = II(l3, l, l1, l2, al[15], 10L, 0xfe2ce6e0L);
l2 = II(l2, l3, l, l1, al[6], 15L, 0xa3014314L);
l1 = II(l1, l2, l3, l, al[13], 21L, 0x4e0811a1L);
l = II(l, l1, l2, l3, al[4], 6L, 0xf7537e82L);
l3 = II(l3, l, l1, l2, al[11], 10L, 0xbd3af235L);
l2 = II(l2, l3, l, l1, al[2], 15L, 0x2ad7d2bbL);
l1 = II(l1, l2, l3, l, al[9], 21L, 0xeb86d391L);
state[0] += l;
state[1] += l1;
state[2] += l2;
state[3] += l3;
} private void md5Update(byte abyte0[], int i)
{
byte abyte1[] = new byte[64];
int k = (int)(count[0] >>> 3) & 0x3f;
if((count[0] += i << 3) < (long)(i << 3))
count[1]++;
count[1] += i >>> 29;
int l = 64 - k;
int j;
if(i >= l)
{
md5Memcpy(buffer, abyte0, k, 0, l);
md5Transform(buffer);
for(j = l; j + 63 < i; j += 64)
{
md5Memcpy(abyte1, abyte0, 0, j, 64);
md5Transform(abyte1);
} k = 0;
} else
{
j = 0;
}
md5Memcpy(buffer, abyte0, k, j, i - j);
}}
❼ JSP MD5加密解密問題。
package com.asset.core.util;
/**
* MD5 加密處理類
* @author 楊柯
* @version 1.0
*/
import java.lang.reflect.*;
/*************************************************
md5 類實現了RSA Data Security, Inc.在提交給IETF
的RFC1321中的MD5 message-digest 演算法。
*************************************************/
public class MD5 {
/* 下面這些S11-S44實際上是一個4*4的矩陣，在原始的C實現中是用#define 實現的，
這里把它們實現成為static final是表示了只讀，切能在同一個進程空間內的多個
Instance間共享*/
static final int S11 = 7;
static final int S12 = 12;
static final int S13 = 17;
static final int S14 = 22;
static final int S21 = 5;
static final int S22 = 9;
static final int S23 = 14;
static final int S24 = 20;
static final int S31 = 4;
static final int S32 = 11;
static final int S33 = 16;
static final int S34 = 23;
static final int S41 = 6;
static final int S42 = 10;
static final int S43 = 15;
static final int S44 = 21;
static final byte[] PADDING = { -128, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
/* 下面的三個成員是MD5計算過程中用到的3個核心數據，在原始的C實現中
被定義到MD5_CTX結構中
*/
private long[] state = new long[4]; // state (ABCD)
private long[] count = new long[2]; // number of bits, molo 2^64 (lsb first)
private byte[] buffer = new byte[64]; // input buffer
/* digestHexStr是MD5的唯一一個公共成員，是最新一次計算結果的
16進制ASCII表示.
*/
public String digestHexStr;
/* digest,是最新一次計算結果的2進制內部表示，表示128bit的MD5值.
*/
private byte[] digest = new byte[16];
/*
getMD5ofStr是類MD5最主要的公共方法，入口參數是你想要進行MD5變換的字元串
返回的是變換完的結果，這個結果是從公共成員digestHexStr取得的．
*/
public String getMD5ofStr(String inbuf) {
md5Init();
md5Update(inbuf.getBytes(), inbuf.length());
md5Final();
digestHexStr = "";
for (int i = 0; i < 8; i++) {
digestHexStr += byteHEX(digest[i]);
}
return digestHexStr.substring(0,11);
}
// 這是MD5這個類的標准構造函數，JavaBean要求有一個public的並且沒有參數的構造函數��
private MD5() {
md5Init();
return;
}
private static MD5 md5=new MD5();
public static MD5 getInstance(){
return MD5.md5;
}
/* md5Init是一個初始化函數，初始化核心變數，裝入標準的幻數 */
private void md5Init() {
count[0] = 0L;
count[1] = 0L;
///* Load magic initialization constants.
state[0] = 0x67452301L;
state[1] = 0xefcdab89L;
state[2] = 0x98badcfeL;
state[3] = 0x10325476L;
return;
}
/* F, G, H ,I 是4個基本的MD5函數，在原始的MD5的C實現中，由於它們是
簡單的位運算，可能出於效率的考慮把它們實現成了宏，在java中，我們把它們
實現成了private方法，名字保持了原來C中的。 */
private long F(long x, long y, long z) {
return (x & y) | ((~x) & z);
}
private long G(long x, long y, long z) {
return (x & z) | (y & (~z));
}
private long H(long x, long y, long z) {
return x ^ y ^ z;
}
private long I(long x, long y, long z) {
return y ^ (x | (~z));
}
/*
FF,GG,HH和II將調用F,G,H,I進行近一步變換
FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
private long FF(long a, long b, long c, long d, long x, long s,
long ac) {
a += F (b, c, d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long GG(long a, long b, long c, long d, long x, long s,
long ac) {
a += G (b, c, d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long HH(long a, long b, long c, long d, long x, long s,
long ac) {
a += H (b, c, d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long II(long a, long b, long c, long d, long x, long s,
long ac) {
a += I (b, c, d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
/*
md5Update是MD5的主計算過程，inbuf是要變換的位元組串，inputlen是長度，這個
函數由getMD5ofStr調用，調用之前需要調用md5init，因此把它設計成private的
*/
private void md5Update(byte[] inbuf, int inputLen) {
int i, index, partLen;
byte[] block = new byte[64];
index = (int)(count[0] >>> 3) & 0x3F;
// /* Update number of bits */
if ((count[0] += (inputLen << 3)) < (inputLen << 3))
count[1]++;
count[1] += (inputLen >>> 29);
partLen = 64 - index;
// Transform as many times as possible.
if (inputLen >= partLen) {
md5Memcpy(buffer, inbuf, index, 0, partLen);
md5Transform(buffer);
for (i = partLen; i + 63 < inputLen; i += 64) {
md5Memcpy(block, inbuf, 0, i, 64);
md5Transform (block);
}
index = 0;
} else
i = 0;
///* Buffer remaining input */
md5Memcpy(buffer, inbuf, index, i, inputLen - i);
}
/*
md5Final整理和填寫輸出結果
*/
private void md5Final () {
byte[] bits = new byte[8];
int index, padLen;
///* Save number of bits */
Encode (bits, count, 8);
///* Pad out to 56 mod 64.
index = (int)(count[0] >>> 3) & 0x3f;
padLen = (index < 56) ? (56 - index) : (120 - index);
md5Update (PADDING, padLen);
///* Append length (before padding) */
md5Update(bits, 8);
///* Store state in digest */
Encode (digest, state, 16);
}
/* md5Memcpy是一個內部使用的byte數組的塊拷貝函數，從input的inpos開始把len長度的
位元組拷貝到output的outpos位置開始
*/
private void md5Memcpy (byte[] output, byte[] input,
int outpos, int inpos, int len)
{
int i;
for (i = 0; i < len; i++)
output[outpos + i] = input[inpos + i];
}
/*
md5Transform是MD5核心變換程序，有md5Update調用，block是分塊的原始位元組
*/
private void md5Transform (byte block[]) {
long a = state[0], b = state[1], c = state[2], d = state[3];
long[] x = new long[16];
Decode (x, block, 64);
/* Round 1 */
a = FF (a, b, c, d, x[0], S11, 0xd76aa478L); /* 1 */
d = FF (d, a, b, c, x[1], S12, 0xe8c7b756L); /* 2 */
c = FF (c, d, a, b, x[2], S13, 0x242070dbL); /* 3 */
b = FF (b, c, d, a, x[3], S14, 0xc1bdceeeL); /* 4 */
a = FF (a, b, c, d, x[4], S11, 0xf57c0fafL); /* 5 */
d = FF (d, a, b, c, x[5], S12, 0x4787c62aL); /* 6 */
c = FF (c, d, a, b, x[6], S13, 0xa8304613L); /* 7 */
b = FF (b, c, d, a, x[7], S14, 0xfd469501L); /* 8 */
a = FF (a, b, c, d, x[8], S11, 0x698098d8L); /* 9 */
d = FF (d, a, b, c, x[9], S12, 0x8b44f7afL); /* 10 */
c = FF (c, d, a, b, x[10], S13, 0xffff5bb1L); /* 11 */
b = FF (b, c, d, a, x[11], S14, 0x895cd7beL); /* 12 */
a = FF (a, b, c, d, x[12], S11, 0x6b901122L); /* 13 */
d = FF (d, a, b, c, x[13], S12, 0xfd987193L); /* 14 */
c = FF (c, d, a, b, x[14], S13, 0xa679438eL); /* 15 */
b = FF (b, c, d, a, x[15], S14, 0x49b40821L); /* 16 */
/* Round 2 */
a = GG (a, b, c, d, x[1], S21, 0xf61e2562L); /* 17 */
d = GG (d, a, b, c, x[6], S22, 0xc040b340L); /* 18 */
c = GG (c, d, a, b, x[11], S23, 0x265e5a51L); /* 19 */
b = GG (b, c, d, a, x[0], S24, 0xe9b6c7aaL); /* 20 */
a = GG (a, b, c, d, x[5], S21, 0xd62f105dL); /* 21 */
d = GG (d, a, b, c, x[10], S22, 0x2441453L); /* 22 */
c = GG (c, d, a, b, x[15], S23, 0xd8a1e681L); /* 23 */
b = GG (b, c, d, a, x[4], S24, 0xe7d3fbc8L); /* 24 */
a = GG (a, b, c, d, x[9], S21, 0x21e1cde6L); /* 25 */
d = GG (d, a, b, c, x[14], S22, 0xc33707d6L); /* 26 */
c = GG (c, d, a, b, x[3], S23, 0xf4d50d87L); /* 27 */
b = GG (b, c, d, a, x[8], S24, 0x455a14edL); /* 28 */
a = GG (a, b, c, d, x[13], S21, 0xa9e3e905L); /* 29 */
d = GG (d, a, b, c, x[2], S22, 0xfcefa3f8L); /* 30 */
c = GG (c, d, a, b, x[7], S23, 0x676f02d9L); /* 31 */
b = GG (b, c, d, a, x[12], S24, 0x8d2a4c8aL); /* 32 */
/* Round 3 */
a = HH (a, b, c, d, x[5], S31, 0xfffa3942L); /* 33 */
d = HH (d, a, b, c, x[8], S32, 0x8771f681L); /* 34 */
c = HH (c, d, a, b, x[11], S33, 0x6d9d6122L); /* 35 */
b = HH (b, c, d, a, x[14], S34, 0xfde5380cL); /* 36 */
a = HH (a, b, c, d, x[1], S31, 0xa4beea44L); /* 37 */
d = HH (d, a, b, c, x[4], S32, 0x4bdecfa9L); /* 38 */
c = HH (c, d, a, b, x[7], S33, 0xf6bb4b60L); /* 39 */
b = HH (b, c, d, a, x[10], S34, 0xbebfbc70L); /* 40 */
a = HH (a, b, c, d, x[13], S31, 0x289b7ec6L); /* 41 */
d = HH (d, a, b, c, x[0], S32, 0xeaa127faL); /* 42 */
c = HH (c, d, a, b, x[3], S33, 0xd4ef3085L); /* 43 */
b = HH (b, c, d, a, x[6], S34, 0x4881d05L); /* 44 */
a = HH (a, b, c, d, x[9], S31, 0xd9d4d039L); /* 45 */
d = HH (d, a, b, c, x[12], S32, 0xe6db99e5L); /* 46 */
c = HH (c, d, a, b, x[15], S33, 0x1fa27cf8L); /* 47 */
b = HH (b, c, d, a, x[2], S34, 0xc4ac5665L); /* 48 */
/* Round 4 */
a = II (a, b, c, d, x[0], S41, 0xf4292244L); /* 49 */
d = II (d, a, b, c, x[7], S42, 0x432aff97L); /* 50 */
c = II (c, d, a, b, x[14], S43, 0xab9423a7L); /* 51 */
b = II (b, c, d, a, x[5], S44, 0xfc93a039L); /* 52 */
a = II (a, b, c, d, x[12], S41, 0x655b59c3L); /* 53 */
d = II (d, a, b, c, x[3], S42, 0x8f0ccc92L); /* 54 */
c = II (c, d, a, b, x[10], S43, 0xffeff47dL); /* 55 */
b = II (b, c, d, a, x[1], S44, 0x85845dd1L); /* 56 */
a = II (a, b, c, d, x[8], S41, 0x6fa87e4fL); /* 57 */
d = II (d, a, b, c, x[15], S42, 0xfe2ce6e0L); /* 58 */
c = II (c, d, a, b, x[6], S43, 0xa3014314L); /* 59 */
b = II (b, c, d, a, x[13], S44, 0x4e0811a1L); /* 60 */
a = II (a, b, c, d, x[4], S41, 0xf7537e82L); /* 61 */
d = II (d, a, b, c, x[11], S42, 0xbd3af235L); /* 62 */
c = II (c, d, a, b, x[2], S43, 0x2ad7d2bbL); /* 63 */
b = II (b, c, d, a, x[9], S44, 0xeb86d391L); /* 64 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
}
/*Encode把long數組按順序拆成byte數組，因為java的long類型是64bit的，
只拆低32bit，以適應原始C實現的用途
*/
private void Encode (byte[] output, long[] input, int len) {
int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) {
output[j] = (byte)(input[i] & 0xffL);
output[j + 1] = (byte)((input[i] >>> 8) & 0xffL);
output[j + 2] = (byte)((input[i] >>> 16) & 0xffL);
output[j + 3] = (byte)((input[i] >>> 24) & 0xffL);
}
}
/*Decode把byte數組按順序合成成long數組，因為java的long類型是64bit的，
只合成低32bit，高32bit清零，以適應原始C實現的用途
*/
private void Decode (long[] output, byte[] input, int len) {
int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
output[i] = b2iu(input[j]) |
(b2iu(input[j + 1]) << 8) |
(b2iu(input[j + 2]) << 16) |
(b2iu(input[j + 3]) << 24);
return;
}
/*
b2iu是我寫的一個把byte按照不考慮正負號的原則的＂升位＂程序，因為java沒有unsigned運算
*/
public static long b2iu(byte b) {
return b < 0 ? b & 0x7F + 128 : b;
}
/*byteHEX()，用來把一個byte類型的數轉換成十六進制的ASCII表示，
因為java中的byte的toString無法實現這一點，我們又沒有C語言中的
sprintf(outbuf,"%02X",ib)
*/
public static String byteHEX(byte ib) {
char[] Digit = { '0','1','2','3','4','5','6','7','8','9',
'A','B','C','D','E','F' };
char [] ob = new char[2];
ob[0] = Digit[(ib >>> 4) & 0X0F];
ob[1] = Digit[ib & 0X0F];
String s = new String(ob);
return s;
}
public static void main(String args[]) {
MD5 m = new MD5();
if (Array.getLength(args) == 0) { //如果沒有參數，執行標準的Test Suiteִ�б���Test Suite
System.out.println("MD5 Test suite:");
System.out.println("MD5(\"\"):"+m.getMD5ofStr(""));
System.out.println("admin: "+m.getMD5ofStr("admin"));
System.out.println("MD5(\"a\"):"+m.getMD5ofStr("a"));
System.out.println("MD5(\"abc\"):"+m.getMD5ofStr("abc"));
System.out.println("MD5(\"message digest\"):"+m.getMD5ofStr("message digest"));
System.out.println("MD5(\"abcdefghijklmnopqrstuvwxyz\"):"+
m.getMD5ofStr("abcdefghijklmnopqrstuvwxyz"));
System.out.println("MD5(\"\"):"+
m.getMD5ofStr(""));
}
else
System.out.println("MD5(" + args[0] + ")=" + m.getMD5ofStr(args[0]));
}
}
❽ Jsp網頁注冊用戶名密碼，時將密碼加密保存資料庫，這樣的加密方式是怎麼實現一般寫在哪個文件里
1、定義一個加密處理的class類，通常可以使用MD5來加密，在網路上可以找到此Java源代碼
2、在保存用戶的密碼時，先對獲取的密碼進行MD5加密後再保存到數據，如：
String passwd=request.getParameter("passwd");
passwd=MD5(passwd);
//通過JDBC寫入到資料庫
3、在用戶登錄時，將用戶登錄輸入的密碼進行MD5加密後與資料庫讀取的密碼進行比較，若相等若通過登錄：
String passwd=request.getParameter("passwd");
.......
if(MD5(passwd).equal(rs.get("passwd")))
//通過登錄