原文：http://blog.csdn.net/ae6623/article/details/8851801
一。cas自帶驗證。
只要用戶名密碼相同就可以的驗證。
在WEB-INF\deployerConfigContext.xml中
<bean
class="org.jasig.cas.authentication.handler.support.SimpleTestUsernamePasswordAuthenticationHandler" />我使用的是mysql,先引入mysql依賴。
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.23</version>
</dependency>引入cas-jdbc依賴
<dependency>
<groupId>org.jasig.cas</groupId>
<artifactId>cas-server-support-jdbc</artifactId>
<version>3.5.1</version>
<exclusions>
<exclusion>
<artifactId>cas-server-core</artifactId>
<groupId>org.jasig.cas</groupId>
</exclusion>
</exclusions>
</dependency>再在WEB-INF\deployerConfigContext.xml中的
的SimpleTestUsernamePasswordAuthenticationHandler下面增加驗證類。
<bean
class="org.jasig.cas.authentication.handler.support.SimpleTestUsernamePasswordAuthenticationHandler" />
<!--配置驗證類1 -->
<bean
class="org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler">
<property name="dataSource" ref="dataSourceForMySql"></property>
<property name="sql"
value="select pw from sys_acct_auth where user_code =?"></property>
<!--下面這個是我自定義的MD5加密類 -->
<property name="passwordEncoder" ref="RS10Md5PasswordEncoder"></property>
<!--下面這個是cas提供的MD5加密類，下面會有bean，你自己一睜眼就看到了，玩過spring的應該看一眼就吐了 <property
name="passwordEncoder" ref="MD5PasswordEncoder" ></property> -->
</bean><!-- 增加數據源2 -->
<bean id="dataSourceForMySql"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/frj-cas</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>123456</value>
</property>
</bean>
<!--數據驗證模式1 cas默認MD5加密類，返回值：加密後的字符串 -->
<bean id="MD5PasswordEncoder"
class="org.jasig.cas.authentication.handler.DefaultPasswordEncoder">
<constructor-arg index="0" value="MD5" />
</bean>
<!--數據驗證模式2 我自定義的MD5加密類，返回值：加密後的字符串 -->
<bean id="RS10Md5PasswordEncoder" class="org.jasig.cas.authentication.handler.Crypt"></bean>編寫MD5加密類如下：
1.Crypt.java這個類，是負責調用MD5工具類，返回加密後的MD5值，必須實現org.jasig.cas.authentication.handler.PasswordEncoder接口/**
* Project Name:JhostAddTime
* File Name:Crypt.java
* Package Name:org.jasig.cas.authentication.handler
* Date:2013-4-25下午02:50:55
* Copyright (c) 2013, riambsoft All Rights Reserved.
*
*/
package org.jasig.cas.authentication.handler;
/**
* ClassName:Crypt <br/>
* Function: TODO ADD FUNCTION. <br/>
* Reason: TODO ADD REASON. <br/>
* Date: 2013-4-25 下午02:50:55 <br/>
* @author Administrator
* @version
* @since JDK 1.5
* @see
*/
public class Crypt implements PasswordEncoder{
/**
* 進行加密編碼
* @param s 要加密的字符串
* @return 加密後的字符串
*/
public String encode(String s)
{
MD5 md5=new MD5();
String ecd=md5.getMD5ofStr(s) ;
System.out.println("-------- need =["+ecd+"]") ;
return ecd;
}
}2.MD5.java
這個類自己寫也可以，從網上直接down也可以，就是一個MD5算法工具類。
package com.rsc.rs.pub.util.functions;
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 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，
這裏把它們實現成爲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, modulo 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變換的字符串
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[i]);
}
return digestHexStr;
}
// 這是MD5這個類的標準構造函數，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，初始化核心變量，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是要變換的字節串，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
字節拷貝到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是分塊的原始字節
*/
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，因爲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，因爲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，因爲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，
因爲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(\"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\"):"+
m.getMD5ofStr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"));
}
else
System.out.println("MD5(" + args[0] + ")=" + m.getMD5ofStr(args[0]));
}
}三.自定義java類，自己寫jdbc。
RsCasDaoAuthenticationHandler.java這個類是我們自定義的認證方式登錄驗證類，你把它當成一開始那個最白癡的用戶名和密碼一致就可以讓用戶認證通過的驗證方式一樣，這樣理解之後，只需要在xml裏面配置好了，就能發揮作用了。
它 必須 繼承org.jasig.cas.authentication.handler.support.AbstractUsernamePasswordAuthenticationHandler.java這個類，否則也沒用啊。
這個java類的用途我說一下，它可以幹你想幹的任何事情，包括去文本文件中提取用戶名和密碼或者連接mysql或者oracle或者其他的之類的事情，總之很方便和實用。（讀取文本神馬的自己寫邏輯去實現）裏面的sql語句自己改啊~~
/**
* Project Name:JhostAddTime
* File Name:RsCasDaoAuthenticationHandler.java
* Package Name:org.jasig.cas.authentication.handler
* Date:2013-4-25下午04:20:35
* Copyright (c) 2013, riambsoft All Rights Reserved.
*
*/
package com.frj.cas.handler;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.jasig.cas.authentication.handler.AuthenticationException;
import org.jasig.cas.authentication.handler.support.AbstractUsernamePasswordAuthenticationHandler;
import org.jasig.cas.authentication.principal.UsernamePasswordCredentials;
/**
* ClassName:RsCasDaoAuthenticationHandler <br/> Function: TODO ADD FUNCTION. <br/> Reason: TODO ADD REASON. <br/> Date: 2013-4-25 下午04:20:35 <br/>
*
* @author Administrator
* @version
* @since JDK 1.5
* @see
*/
public final class RsCasDaoAuthenticationHandler extends AbstractUsernamePasswordAuthenticationHandler {
// 構造方法
public RsCasDaoAuthenticationHandler() {
}
@Override
protected boolean authenticateUsernamePasswordInternal(UsernamePasswordCredentials credentials) throws AuthenticationException {
// 標誌位
Boolean bool = false;
String username = credentials.getUsername();
String password = credentials.getPassword();
// 取得MD5加密後的字符串
password = new Crypt().encode(password);
System.out.println("開始CAS認證方式 RsCasDaoAuthenticationHandler......");
System.out.println("userName:" + username);
System.out.println("password:" + password);
// 連接數據庫
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
String user = "root";
String pwd = "123456";
String url = "jdbc:mysql://localhost:3306/frj-cas";
try {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
conn = DriverManager.getConnection(url, user, pwd);
String sql = "select count(*) from user where username='" + username + "' and password='" + password + "'";
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
if (rs != null && rs.next()) {
int i = rs.getInt(1);
if (i > 0) {
// 只要有對應的一條記錄通過，就返回true
bool = true;
}
}
} catch (SQLException sql) {
sql.printStackTrace();
} finally {
try {
if (rs != null) {
rs.close();
}
if (ps != null) {
ps.close();
}
if (conn != null) {
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return bool;
}
}- <!--配置驗證類3-->
- <bean class="org.jasig.cas.authentication.handler.RsCasDaoAuthenticationHandler" />
