苦逼的折腾了快一星期，总算把新浪微博rsa加密登录折腾ok了，这里需要注意的是httpclient最好用4.0的，否则cookie管理很是问题。

进入正题，最近新浪微博更新了sso登录方式，加密算法变成了rsa，获取nonce和servertime，pubkey，这里涉及到rsa加密，通常用java进行rsa加密一般都是从文件读取公钥信息或者是base64编码的公钥信息转换成key，然后进行加密，但是新浪给的不是base64加密，而是给的一个N（参见RSA加密算法，RSA加密算法） n^e \equiv c\ (\mathrm{mod}\ N) ，而我先入为主，把新浪给的pubkey当作base64编码的公钥信息，苦逼的折腾了快一天。后来再细看看RSA加密算法感觉pubkey不像是base64编码，看到网上有人分析新浪的sso.js，于是我也看一下，终于有收获，看到他把pubkey解析成biginteger，感觉怪怪的，联想到rsa的百科，发现应该是我搞错了，遂找到以下方法。用pubkey进行加密。

方法名气得不是很理想，但是不影响我们学习。搞定加密了，接下来更苦逼的是http-client3这托，我看网上有人弄出来的代码，参考着弄下，但是他们的验证方法，参数都有问题，我参照有人用ruby写的（sso 1.4.2版本的），将该替换的都替换了，一直进行到ajaxlogin这里，可以获取到我的个人信息，但是苦逼的是，真正登录的时候不行，我怀疑是cookie问题，因为一直警告我cookie reject，因为新浪sso登录时候用了些技巧解决跨域。好，那我就山寨点，把cookie domain该了，改成.weibo.com最终获取用户主页时retcode=6102，查了下sso.js代码，发现是没登录成功 ，cookie问题。什么办法读想了，抓包，分析，firebug分析，google了无数遍，最后还是没成功。无奈继续google，苦心不负有心人，最终发现这篇，http-client4来做的，我隐约记得官方推荐用hc4，于是就搞了下，竟然可以获得首页一些信息，虽然不是html的，但应该是成功了，之前没成功的话获取个人主页会得到登录的html。下面是主要代码。

测试过的代码

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.params.CookiePolicy;
import org.apache.http.client.params.HttpClientParams;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.HttpParams;


/**
 * 使用httpclient4登陆百度
 * @author gohands
 *
 */
public class BaiduLogin {
    
    private static String URL_CHARACTER = "gb2312"; // 统一字符集
    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {
        //初始化
        DefaultHttpClient httpclient = new DefaultHttpClient();
        // 这一行必须要加，否则服务器无法获取登陆状态
        HttpClientParams.setCookiePolicy(httpclient.getParams(),CookiePolicy.BROWSER_COMPATIBILITY);

        // 第一次访问
        String url = "http://www.baidu.com";
        HttpGet httpget = new HttpGet(url);
        HttpResponse response = httpclient.execute(httpget);
        System.out.println("Length1::" + response.getEntity().getContentLength());
        HttpEntity entity = response.getEntity();
        BaiduLogin.printEntity(entity);

        // 登陆【使用POST方式登录】
        // 如果要直接执行，麻烦去申请个百度的帐号
        // 不好意思，给百度做广告了
        HttpPost httpost = new HttpPost("https://passport.baidu.com/v2/api/?login");
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        nvps.add(new BasicNameValuePair("username", "dollar625"));
        nvps.add(new BasicNameValuePair("password", "********"));
        httpost.setEntity(new UrlEncodedFormEntity(nvps, BaiduLogin.URL_CHARACTER));
        response = httpclient.execute(httpost);

        // 第二次访问
        System.out.println("\n----------------------------------------");
        System.out.println(response.getStatusLine());
        List<Cookie> cookies = httpclient.getCookieStore().getCookies();
        entity = response.getEntity();
        BaiduLogin.printEntity(entity);

        System.out.println("\n----------------------------------------");

        cookies = httpclient.getCookieStore().getCookies();

        System.out.println("cookies" + cookies.size());
        httpget = new HttpGet(url);
        // httpget.setr
        // httpget.setHeader(name, value)
        response = httpclient.execute(httpget);
        System.out.println("Length2::"
                + response.getEntity().getContentLength());
        entity = response.getEntity();
        BaiduLogin.printEntity(entity);
    }

    /**
     * 输出entity内容，获取和输出返回的HTML文
     * @param entity
     * @throws IllegalStateException
     * @throws IOException
     */
    private static void printEntity(HttpEntity entity)
            throws IllegalStateException, IOException {

        if (entity == null) {
            return;
        }
        System.out.println("HttpEntity start >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
        System.out.println("Response content length: " + entity.getContentLength());
        InputStream is = entity.getContent();
        BufferedReader in = new BufferedReader(new InputStreamReader(is));
        List<Byte> li = new ArrayList();
        int i;
        //之所以写的如此复杂是因为了解决中文问题
        while ((i = is.read()) != -1) {
            li.add((byte) i);
        }
        byte a[] = new byte[li.size()];
        for (i = 0; i < a.length; i++) {
            a[i] = (byte) li.get(i);
        }
        System.out.println(new String(a, BaiduLogin.URL_CHARACTER)); // 打印HTML内容
        entity.consumeContent(); // entity销毁
        System.out.println("HttpEntity END >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
    }
}

　　得到的结果：

Length1::10299
HttpEntity start >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Response content length: 10299
<!DOCTYPE html><!--STATUS OK-->    <html><head>  <meta http-equiv="content-type" content="text/html;charset=utf-8">  <title>?惧害涓??锛??灏辩???/title> <style >html,body{height:100%}html{overflow-y:auto}#wrapper{position:relative;_position:;min-height:100%}#content{padding-bottom:100px;text-align:center}#ftCon{height:100px;position:absolute;bottom:44px;text-align:center;100%;margin:0 auto;z-index:0;overflow:hidden}#ftConw{720px;margin:0 auto}body{font:12px arial;text-align:;background:#fff}body,p,form,ul,li{margin:0;padding:0;list-style:none}body,form,#fm{position:relative}td{text-align:left}img{border:0}a{color:#00c}a:active{color:#f60}#u{color:#999;padding:4px 10px 5px 0;text-align:right}#u a{margin:0 5px}#u .reg{margin:0}#m{720px;margin:0 auto}#nv a,#nv b,.btn,#lk{font-size:14px}#fm{padding-left:110px;text-align:left;z-index:1}input{border:0;padding:0}#nv{height:19px;font-size:16px;margin:0 0 4px;text-align:left;text-indent:137px}.s_ipt_wr{418px;height:30px;display:inline-block;margin-right:5px;background:url(http://s1.bdstatic.com/r/www/img/i-1.0.0.png) no-repeat -304px 0;border:1px solid #b6b6b6;border-color:#9a9a9a #cdcdcd #cdcdcd #9a9a9a;vertical-align:top}.s_ipt{405px;height:22px;font:16px/22px arial;margin:5px 0 0 7px;background:#fff;outline:0;-webkit-appearance:none}.s_btn{95px;height:32px;padding-top:2px\9;font-size:14px;background:#ddd url(http://s1.bdstatic.com/r/www/img/i-1.0.0.png);cursor:pointer}.s_btn_h{background-position:-100px 0}.s_btn_wr{97px;height:34px;display:inline-block;background:url(http://s1.bdstatic.com/r/www/img/i-1.0.0.png) no-repeat -202px 0;*position:relative;z-index:0;vertical-align:top}#lg img{vertical-align:top;margin-bottom:3px}#lk{margin:33px 0}#lk span{font:14px "瀹??"}#lm{height:60px}#lh{margin:16px 0 5px;word-spacing:3px}.tools{position:absolute;top:-4px;*top:10px;right:7px}#mHolder{62px;position:relative;z-index:296;display:none}#mCon{height:18px;line-height:18px;position:absolute;cursor:pointer;padding:0 18px 0 0;background:url(http://s1.bdstatic.com/r/www/img/bg-1.0.0.gif) no-repeat right -134px;background-position:right -136px\9}#mCon span{color:#00c;cursor:default;display:block}#mCon .hw{text-decoration:underline;cursor:pointer}#mMenu a{100%;height:100%;display:block;line-height:22px;text-indent:6px;text-decoration:none;filter:none\9}#mMenu,#user ul{box-shadow:1px 1px 2px #ccc;-moz-box-shadow:1px 1px 2px #ccc;-webkit-box-shadow:1px 1px 2px #ccc;filter:progid:DXImageTransform.Microsoft.Shadow(Strength=2,Direction=135,Color="#cccccc")\9}#mMenu{56px;border:1px solid #9b9b9b;list-style:none;position:absolute;right:27px;top:28px;display:none;background:#fff}#mMenu a:hover{background:#ebebeb}#mMenu .ln{height:1px;background:#ebebeb;overflow:hidden;font-size:1px;line-height:1px;margin-top:-1px}#cp,#cp a{color:#666}#seth{display:none;behavior:url(#default#homepage)}#setf{display:none}#sekj{margin-left:14px}#shouji{margin-right:14px}</style> <script>function h(obj){obj.style.behavior='url(#default#homepage)';var a = obj.setHomePage('http://www.baidu.com/');}</script></head><body>  <div id="wrapper"><div id="content"> <div id="u"><a href="http://www.baidu.com/gaoji/preferences.html" name="tj_setting">??储璁剧疆</a>|<a href="https://passport.baidu.com/v2/?login&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2F" name="tj_login" id="lb" onclick="return false;">?诲?</a><a href="https://passport.baidu.com/v2/?reg&regType=1&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2F" target="_blank" name="tj_reg" class="reg">娉ㄥ?</a></div> <div id="m"> <p id="lg"><img src="http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width="270" height="129"   ></p> <p id="nv"><a href="http://news.baidu.com">??nbsp;??/a>??b>缃?nbsp;椤?/b>??a href="http://tieba.baidu.com">璐?nbsp;??/a>??a href="http://zhidao.baidu.com">??nbsp;??/a>??a href="http://music.baidu.com">??nbsp;涔?/a>??a href="http://image.baidu.com">??nbsp;??/a>??a href="http://video.baidu.com">瑙?nbsp;棰?/a>??a href="http://map.baidu.com">??nbsp;??/a></p><div id="fm"><form name="f" action="/s"><span class="s_ipt_wr"><input type="text" name="wd" id="kw" maxlength="100" class="s_ipt"></span><input type="hidden" name="rsv_bp" value="0"><input type=hidden name=ch value=""><input type=hidden name=tn value="baidu"><input type=hidden name=bar value=""><input type="hidden" name="rsv_spt" value="3"><input type="hidden" name="ie" value="utf-8"><span class="s_btn_wr"><input type="submit" value="?惧害涓??" id="su" class="s_btn" onmousedown="this.className='s_btn s_btn_h'" onmouseout="this.className='s_btn'"></span></form><span class="tools"><span id="mHolder"><div id="mCon"><span>杈??娉?/span></div></span></span><ul id="mMenu"><li><a href="#" name="ime_hw">???</a></li><li><a href="#" name="ime_py">?奸?</a></li><li class="ln"></li><li><a href="#" name="ime_cl">?抽?</a></li></ul></div> <p id="lk"><a href="http://baike.baidu.com">?剧?</a>??a href="http://wenku.baidu.com">???</a>??a href="http://www.hao123.com">hao123</a><span> | <a href="http://www.baidu.com/more/">?村?>></a></span></p><p id="lm"></p> </div> </div> <div id="ftCon"><div id="ftConw"> <p ><a id="seth" onClick="h(this)" href="/" onmousedown="return ns_c({'fm':'behs','tab':'homepage','pos':0})">???搴??涓轰富椤?/a><a id="setf" href="http://www.baidu.com/cache/sethelp/index.html" onmousedown="return ns_c({'fm':'behs','tab':'favorites','pos':0})" target="_blank">???搴??涓轰富椤?/a><span id="sekj"><a href="http://liulanqi.baidu.com/ps.php" target="_blank" onmousedown="return ns_c({'fm':'behs','tab':'bdbrwlk','pos':1})">瀹???惧害娴????/a></span></p><p id="lh"><a href="http://e.baidu.com/?refer=888" onmousedown="return ns_c({'fm':'behs','tab':'btlink','pos':2})">????惧害?ㄥ箍</a> | <a href="http://top.baidu.com">??储椋??姒?/a> | <a href="http://home.baidu.com">?充??惧害</a> | <a href="http://ir.baidu.com">About Baidu</a></p><p id="cp">©2013 Baidu <a href="/duty/">浣跨??惧害???璇?/a> <a href="http://www.miibeian.gov.cn" target="_blank">浜?CP璇?30173??/a> <img src="http://www.baidu.com/cache/global/img/gs.gif"></p></div></div> </div> </body><script>var bds={se:{},comm : {ishome : 1,sid : "1464_1945_1788",user : "",username : "",sugHost : "http://suggestion.baidu.com/su",personalData : "",loginAction : []}}</script><script type="text/javascript" src="http://s1.bdstatic.com/r/www/cache/global/js/home-2.8.js" charset="gbk"></script><script>var bdUser = null;var w=window,d=document,n=navigator,k=d.f.wd,a=d.getElementById("nv").getElementsByTagName("a"),isIE=n.userAgent.indexOf("MSIE")!=-1&&!window.opera;(function(){if(/q=([^&]+)/.test(location.search)){k.value=decodeURIComponent(RegExp["\x241"])}})();if(n.cookieEnabled){bds.se.sug();};function addEV(o, e, f){if(w.attachEvent){o.attachEvent("on" + e, f);}else if(w.addEventListener){ o.addEventListener(e, f, false);}}function G(id){return d.getElementById(id);}function ns_c(q){var p = encodeURIComponent(window.document.location.href), sQ = '', sV = '', mu='', img = window["BD_PS_C" + (new Date()).getTime()] = new Image();for (v in q) {sV = q[v];sQ += v + "=" + sV + "&";} mu= "&mu=" + p ;img.src = "http://nsclick.baidu.com/v.gif?pid=201&pj=www&rsv_sid=1464_1945_1788&" + sQ + "path="+p+"&t="+new Date().getTime();return true;}if(/\bbdime=[12]/.test(d.cookie)){document.write('<script src=http://s1.bdstatic.com/r/www/cache/ime/js/openime-1.0.1.js charset="gbk"><\/script>');}(function(){var u = G("u").getElementsByTagName("a"), nv = G("nv").getElementsByTagName("a"), lk = G("lk").getElementsByTagName("a"), un = "";var tj_nv = ["news","tieba","zhidao","mp3","img","video","map"];var tj_lk = ["baike","wenku","hao123","more"];un = bds.comm.user == "" ? "" : bds.comm.user;function _addTJ(obj){addEV(obj, "mousedown", function(e){var e = e || window.event;var target = e.target || e.srcElement;ns_c({'fm':'behs','tab':target.name||'tj_user','un':encodeURIComponent(un)});});}for(var i = 0; i < u.length; i++){_addTJ(u[i]);}for(var i = 0; i < nv.length; i++){nv[i].name = 'tj_' + tj_nv[i];}for(var i = 0; i < lk.length; i++){lk[i].name = 'tj_' + tj_lk[i];}})();(function() {var links = {'tj_news': ['word', 'http://news.baidu.com/ns?tn=news&cl=2&rn=20&ct=1&ie=utf-8'],'tj_tieba': ['kw', 'http://tieba.baidu.com/f?ie=utf-8'],'tj_zhidao': ['word', 'http://zhidao.baidu.com/search?pn=0&rn=10&lm=0'],'tj_mp3': ['key', 'http://music.baidu.com/search?fr=ps&ie=utf-8'],'tj_img': ['word', 'http://image.baidu.com/i?ct=201326592&cl=2&nc=1&lm=-1&st=-1&tn=baiduimage&istype=2&fm=&pv=&z=0&ie=utf-8'],'tj_video': ['word', 'http://video.baidu.com/v?ct=301989888&s=25&ie=utf-8'],'tj_map': ['wd', 'http://map.baidu.com/?newmap=1&ie=utf-8&s=s'],'tj_baike': ['word', 'http://baike.baidu.com/search/word?pic=1&sug=1&enc=utf8'],'tj_wenku': ['word', 'http://wenku.baidu.com/search?ie=utf-8']};var domArr = [G('nv'), G('lk')],kw = G('kw');for (var i = 0, l = domArr.length; i < l; i++) {domArr[i].onmousedown = function(e) {e = e || window.event;var target = e.target || e.srcElement,name = target.getAttribute('name'),items = links[name],reg = new RegExp('^\\s+|\\s+\x24'),key = kw.value.replace(reg, '');if (items) {if (key.length > 0) {var wd = items[0], url = items[1],url = url + ( name === 'tj_map' ? encodeURIComponent('&' + wd + '=' + key) : ( ( url.indexOf('?') > 0 ? '&' : '?' ) + wd + '=' + encodeURIComponent(key) ) );target.href = url;} else {target.href = target.href.match(new RegExp('^http:\/\/.+\.baidu\.com'))[0];}}name && ns_c({'fm': 'behs','tab': name,'query': encodeURIComponent(key),'un': encodeURIComponent(bds.comm.user || '') });};}})();addEV(w,"load",function(){k.focus()});w.onunload=function(){};</script><script type="text/javascript" src="http://s1.bdstatic.com/r/www/cache/global/js/tangram-1.3.4c1.0.js"></script><script type="text/javascript" src="http://s1.bdstatic.com/r/www/cache/user/js/u-1.3.4.js" charset="gbk"></script><script>try{document.cookie="WWW_ST=;expires=Sat, 01 Jan 2000 00:00:00 GMT";baidu.on(document.forms[0],"submit",function(){var _t=new Date().getTime();document.cookie = "WWW_ST=" + _t +";expires=" + new Date(_t + 10000).toGMTString()})}catch(e){}</script></html><!--3847f41d362754ab-->
HttpEntity END >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

----------------------------------------
HTTP/1.1 200 OK
HttpEntity start >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Response content length: 439
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>


<script type="text/javascript">

var url = encodeURI('https://passport.baidu.com/jump.html?error=119998&callback=&index=0&username=&phonenumber=&mail=&tpl=&u=https%3A%2F%2Fpassport.baidu.com%2F&needToModifyPassword=0&gotourl=');
//parent.callback(url)
window.location.replace(url);

</script>
</body>
</html>
HttpEntity END >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

----------------------------------------
cookies2
Length2::10309
HttpEntity start >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Response content length: 10309
<!DOCTYPE html><!--STATUS OK-->    <html><head>  <meta http-equiv="content-type" content="text/html;charset=utf-8">  <title>?惧害涓??锛??灏辩???/title> <style >html,body{height:100%}html{overflow-y:auto}#wrapper{position:relative;_position:;min-height:100%}#content{padding-bottom:100px;text-align:center}#ftCon{height:100px;position:absolute;bottom:44px;text-align:center;100%;margin:0 auto;z-index:0;overflow:hidden}#ftConw{720px;margin:0 auto}body{font:12px arial;text-align:;background:#fff}body,p,form,ul,li{margin:0;padding:0;list-style:none}body,form,#fm{position:relative}td{text-align:left}img{border:0}a{color:#00c}a:active{color:#f60}#u{color:#999;padding:4px 10px 5px 0;text-align:right}#u a{margin:0 5px}#u .reg{margin:0}#m{720px;margin:0 auto}#nv a,#nv b,.btn,#lk{font-size:14px}#fm{padding-left:110px;text-align:left;z-index:1}input{border:0;padding:0}#nv{height:19px;font-size:16px;margin:0 0 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