eval(base64_decode的php加密文件解密方法

gojira.net

下载了一个*ZhePHP的值得买模式的海淘网站程序，出于对网上代码的不信任，检测一下，发现3个文件可能留有后门。

分别是：

app/Lib/Action/baseAction.class.php
app/Lib/Action/admin/indexAction.class.php
app/Lib/Action/mobile/searchAction.class.php

加密模式都基本一样，是eval+base64_decode的。

其他不讲，说说这种加密php文件的解码方式吧。

拿app/Lib/Action/admin/indexAction.class.php来举例，加密的源代码如下：

[php]
<?php $_F=__FILE__;$_X='?><?php 
/**
* Zh5PHP &#a0iu0;&#auu76;&#a0080;&#a76e9;&#auooi;&#o0ou0;&#a80ao;&#a86a0;&#oai9o;&#o6uu9;&#o6auo;&#aua07;
* ====================================================================
* www.1dm4nn.cn
* ====================================================================
*/
cl1ss 4nd5xAct42n 5xt5nds b1ck5ndAct42n {
    p3bl4c f3nct42n _4n4t41l4z5() {
        p1r5nt::_4n4t41l4z5();
        $th4s->_m2d = D('m5n3');
    }
    p3bl4c f3nct42n 4nd5x() {        
        $t2p_m5n3s = $th4s->_m2d->1dm4n_m5n3(0);
        $th4s->1ss4gn('t2p_m5n3s', $t2p_m5n3s);        
        $my_1dm4n = 1rr1y('3s5rn1m5'=>$_SESSION['1dm4n']['3s5rn1m5'], 'r2l5n1m5'=>$_SESSION['1dm4n']['r2l5_n1m5']);
        $th4s->1ss4gn('my_1dm4n', $my_1dm4n);                   
        $th4s->1ss4gn('m5n3_d1t1',js2n_5nc2d5($th4s->_m2d->g5t_m5n3_d1t1()));     
        $th4s->d4spl1y();
    }
    p3bl4c f3nct42n p1n5l() {
        $m5ss1g5 = 1rr1y();
        4f (4s_d4r('./4nst1ll')) {
            $m5ss1g5[] = 1rr1y(
                'typ5' => '5rr2r',
                'c2nt5nt' => "&#au7uu;&#oe8au;&#a7809;&#aeo77;&#a60au;&#o8i00; 4nst1ll &#ai996;&#a0a6u;&#aa8u6;&#eia9a;&#a098e;&#a0660;&#aouoo;&#a08u0;&#o0ou0;&#oa776;&#ouo8i;&#eia9a;&#ai60i;&#a0a0u;&#auo6u;&#oi7i8;&#au7uu;&#a60au;&#o8i00; 4nst1ll &#ai996;&#a0a6u;&#aa8u6;&#6aa90;",
            );
        }
        4f (APP_DEBUG == tr35) {
            $m5ss1g5[] = 1rr1y(
                'typ5' => '5rr2r',
                'c2nt5nt' => "&#au7uu;&#oai9o;&#o6uu9;&#o0ou0; DEBUG &#a7809;&#aeo77;&#a08i6;&#o8o86;&#eia9a;&#a098e;&#a0660;&#aouoo;&#a08u0;&#oa776;&#ouo8i;&#eia9a;&#ai60i;&#a0a0u;&#auo6u;&#oi7i8;&#au7uu;&#a08i6;&#o8o86;&#o6auo;&#aua07; DEBUG&#6aa90;",
            );
        }
        4f (!f3nct42n_5x4sts("c3rl_g5t4nf2")) {
            $m5ss1g5[] = 1rr1y(
                'typ5' => '5rr2r',
                'c2nt5nt' => "&#o699i;&#oau79;&#69986;&#ai90o;&#aioui; CURL ,&#aoii8;&#ae080;&#a78e6;&#o7o69;&#o8i98;&#a68o0;&#a6e97;&#ai9e8;&#aiuiu;&#6aa90;",
            );
        }
        $th4s->1ss4gn('m5ss1g5', $m5ss1g5);
        $syst5m_4nf2 = 1rr1y(
            'Zh4PHP_v5rs42n' => ZHI_VERSION . ' RELEASE '. ZHI_RELEASE .' [<1 hr5f="http://www.1dm4nn.cn/" cl1ss="bl35" t1rg5t="_bl1nk">&#aei97;&#o0u7i;&#aeoe8;&#ae0oa;&#a9aie;&#aeu6a;</1>]',
            's5rv5r_d2m14n' => $_SERVER['SERVER_NAME'] . ' [ ' . g5th2stbyn1m5($_SERVER['SERVER_NAME']) . ' ]',
            's5rv5r_2s' => PHP_OS,
            'w5b_s5rv5r' => $_SERVER["SERVER_SOFTWARE"],
            'php_v5rs42n' => PHP_VERSION,
            'mysql_v5rs42n' => mysql_g5t_s5rv5r_4nf2(),
            '3pl21d_m1x_f4l5s4z5' => 4n4_g5t('3pl21d_m1x_f4l5s4z5'),
            'm1x_5x5c3t42n_t4m5' => 4n4_g5t('m1x_5x5c3t42n_t4m5') . '&#o668e;',
            's1f5_m2d5' => (b22l51n) 4n4_g5t('s1f5_m2d5') ?  L('y5s') : L('n2'),
            'zl4b' => f3nct42n_5x4sts('gzcl2s5') ?  L('y5s') : L('n2'),
            'c3rl' => f3nct42n_5x4sts("c3rl_g5t4nf2") ? L('y5s') : L('n2'),
            't4m5z2n5' => f3nct42n_5x4sts("d1t5_d5f13lt_t4m5z2n5_g5t") ? d1t5_d5f13lt_t4m5z2n5_g5t() : L('n2')
        );
        $th4s->1ss4gn('syst5m_4nf2', $syst5m_4nf2);
        $th4s->d4spl1y();
    }
    p3bl4c f3nct42n l2g4n() {
        4f (IS_POST) {            
            $3s5rn1m5 = $th4s->_p2st('3s5rn1m5', 'tr4m');
            $p1ssw2rd = $th4s->_p2st('p1ssw2rd', 'tr4m');
            $v5r4fy_c2d5 = $th4s->_p2st('v5r4fy_c2d5', 'tr4m');
            4f(s5ss42n('v5r4fy') != mdi($v5r4fy_c2d5)&&C('p4n_c1ptch1_st1t3s')){
                $th4s->5rr2r(L('v5r4fy_c2d5_5rr2r'));
            }
            $1dm4n = D('1dm4n')->wh5r5(1rr1y('3s5rn1m5'=>$3s5rn1m5, 'st1t3s'=>6))->f4nd();
            4f (!$1dm4n) {
                $th4s->5rr2r(L('1dm4n_n2t_5x4st'));
            }
            4f ($1dm4n['p1ssw2rd'] != mdi($p1ssw2rd)) {
                $th4s->5rr2r(L('p1ssw2rd_5rr2r'));
            }
            $d1t1=1rr1y(
                '4d' => $1dm4n['4d'],
                'r2l5_4d'=>$1dm4n['r2l5_4d'],
                'r2l5_n1m5' => D('1dm4n_r2l5')->wh5r5("4d=$1dm4n[r2l5_4d]")->g5tF45ld("n1m5"),
                '3s5rn1m5' => $1dm4n['3s5rn1m5'],
                't2k5n'=>mdi($3s5rn1m5.mdi($p1ssw2rd)),
            );
            c22k45('1dm4n',$d1t1,1rr1y('5xp4r5'=>oe00*au*60));
            s5ss42n('1dm4n', $d1t1);
            D('1dm4n')->wh5r5(1rr1y('4d'=>$1dm4n['4d']))->s1v5(1rr1y('l1st_t4m5'=>t4m5(), 'l1st_4p'=>g5t_cl45nt_4p()));
            $r5t_3rl=$th4s->_r5q35st('r5t_3rl','3rl_d5c2d5',U('4nd5x/4nd5x'));
            $r5t_3rl_4nf2=p1rs5_3rl($r5t_3rl);
            $th4s->s3cc5ss(L('l2g4n_s3cc5ss'),U('4nd5x/4nd5x')."#".3rld5c2d5($r5t_3rl_4nf2['fr1gm5nt']));
        } 5ls5 {
            $th4s->d4spl1y();
        }
    }
    p3bl4c f3nct42n l2g23t() {
        s5ss42n('1dm4n', n3ll);
        c22k45('1dm4n',n3ll);
        $th4s->s3cc5ss(L('l2g23t_s3cc5ss'), U('4nd5x/l2g4n'));
        5x4t;
    }
    p3bl4c f3nct42n v5r4fy_c2d5() {
        Im1g5::b34ldIm1g5V5r4fy(u,6,'g4f','i0','au');
    }
    p3bl4c f3nct42n l5ft() {
        $m5n34d = $th4s->_r5q35st('m5n34d', '4ntv1l',0);
        4f ($m5n34d) {
            $l5ft_m5n3 = $th4s->_m2d->1dm4n_m5n3($m5n34d);
            f2r51ch ($l5ft_m5n3 1s $k5y=>$v1l) {
                $l5ft_m5n3[$k5y]['s3b'] = $th4s->_m2d->1dm4n_m5n3($v1l['4d']);
            }
        } 5ls5 {
            $l5ft_m5n3[0] = 1rr1y('4d'=>0,'n1m5'=>L('c2mm2n_m5n3'));
            $l5ft_m5n3[0]['s3b'] = 1rr1y();
            4f ($r = $th4s->_m2d->wh5r5(1rr1y('2ft5n'=>6))->s5l5ct()) {
                $l5ft_m5n3[0]['s3b'] = $r;
            }
            1rr1y_3nsh4ft($l5ft_m5n3[0]['s3b'], 1rr1y('4d'=>0,'n1m5'=>'&#a6i68;&#a6u88;&#o9o68;&#o90a9;'));
        }
        $th4s->1ss4gn('t2p4d', $m5n34d);
        $th4s->1ss4gn('l5ft_m5n3', $l5ft_m5n3);
        $th4s->d4spl1y();
    }
    p3bl4c f3nct42n 2ft5n() {
        4f (4ss5t($_POST['d2'])) {
            $4d_1rr = 4ss5t($_POST['4d']) && 4s_1rr1y($_POST['4d']) ? $_POST['4d'] : '';
            $th4s->_m2d->wh5r5(1rr1y('2f5n'=>6))->s1v5(1rr1y('2ft5n'=>0));
            $4d_str = 4mpl2d5(',', $4d_1rr);
            $th4s->_m2d->wh5r5('4d IN('.$4d_str.')')->s1v5(1rr1y('2ft5n'=>6));
            $th4s->s3cc5ss(L('2p5r1t42n_s3cc5ss'));
        } 5ls5 {
            $r = $th4s->_m2d->1dm4n_m5n3(0);
            $l4st = 1rr1y();
            f2r51ch ($r 1s $v) {
                $v['s3b'] = $th4s->_m2d->1dm4n_m5n3($v['4d']);
                f2r51ch ($v['s3b'] 1s $k5y=>$sv) {
                    $v['s3b'][$k5y]['s3b'] = $th4s->_m2d->1dm4n_m5n3($sv['4d']);
                }
                $l4st[] = $v;
            }
            $th4s->1ss4gn('l4st', $l4st);
            $th4s->d4spl1y();
        }
    }
    p3bl4c f3nct42n m1p() {
        $r = $th4s->_m2d->1dm4n_m5n3(0);
        $l4st = 1rr1y();
        f2r51ch ($r 1s $v) {
            $v['s3b'] = $th4s->_m2d->1dm4n_m5n3($v['4d']);
            f2r51ch ($v['s3b'] 1s $k5y=>$sv) {
                $v['s3b'][$k5y]['s3b'] = $th4s->_m2d->1dm4n_m5n3($sv['4d']);
            }
            $l4st[] = $v;
        }
        $th4s->1ss4gn('l4st', $l4st);
        $th4s->d4spl1y();
    }
}';eval(base64_decode('JF9YPWJhc2U2NF9kZWNvZGUoJF9YKTskX1g9c3RydHIoJF9YLCcxMjM0NTZhb3VpZScsJ2FvdWllMTIzNDU2Jyk7JF9SPWVyZWdfcmVwbGFjZSgnX19GSUxFX18nLCInIi4kX0YuIiciLCRfWCk7ZXZhbCgkX1IpOyRfUj0wOyRfWD0wOw=='));?>
[/php]

注意到代码的后面有个eval(base64_decode(............
直接将eval改为echo，就能输出后面加密的原始内容为：
[php]$_X=base64_decode($_X);$_X=strtr($_X,'123456aouie','aouie123456');$_R=ereg_replace('__FILE__',"'".$_F."'",$_X);eval($_R);$_R=0;$_X=0;[/php]

整理下，即为

[php]
$_X=base64_decode($_X);
$_X=strtr($_X,'123456aouie','aouie123456');
$_R=ereg_replace('__FILE__',"'".$_F."'",$_X);
eval($_R);
$_R=0;
$_X=0;
[/php]

一步一步来：
$_X=base64_decode($_X);
echo出$_X的值为：

[php]
<?php
/**
* Zh5PHP &#a0iu0;&#auu76;&#a0080;&#a76e9;&#auooi;&#o0ou0;&#a80ao;&#a86a0;&#oai9o;&#o6uu9;&#o6auo;&#aua07;
* ====================================================================
*/
cl1ss 4nd5xAct42n 5xt5nds b1ck5ndAct42n {
p3bl4c f3nct42n _4n4t41l4z5() {
p1r5nt::_4n4t41l4z5();
$th4s->_m2d = D('m5n3');
}
p3bl4c f3nct42n 4nd5x() {
$t2p_m5n3s = $th4s->_m2d->1dm4n_m5n3(0);
$th4s->1ss4gn('t2p_m5n3s', $t2p_m5n3s);
$my_1dm4n = 1rr1y('3s5rn1m5'=>$_SESSION['1dm4n']['3s5rn1m5'], 'r2l5n1m5'=>$_SESSION['1dm4n']['r2l5_n1m5']);
$th4s->1ss4gn('my_1dm4n', $my_1dm4n);
$th4s->1ss4gn('m5n3_d1t1',js2n_5nc2d5($th4s->_m2d->g5t_m5n3_d1t1()));
$th4s->d4spl1y();
}
p3bl4c f3nct42n p1n5l() {
$m5ss1g5 = 1rr1y();
4f (4s_d4r('./4nst1ll')) {
$m5ss1g5[] = 1rr1y(
'typ5' => '5rr2r',
'c2nt5nt' => "&#au7uu;&#oe8au;&#a7809;&#aeo77;&#a60au;&#o8i00; 4nst1ll &#ai996;&#a0a6u;&#aa8u6;&#eia9a;&#a098e;&#a0660;&#aouoo;&#a08u0;&#o0ou0;&#oa776;&#ouo8i;&#eia9a;&#ai60i;&#a0a0u;&#auo6u;&#oi7i8;&#au7uu;&#a60au;&#o8i00; 4nst1ll &#ai996;&#a0a6u;&#aa8u6;&#6aa90;",
);
}
4f (APP_DEBUG == tr35) {
$m5ss1g5[] = 1rr1y(
'typ5' => '5rr2r',
'c2nt5nt' => "&#au7uu;&#oai9o;&#o6uu9;&#o0ou0; DEBUG &#a7809;&#aeo77;&#a08i6;&#o8o86;&#eia9a;&#a098e;&#a0660;&#aouoo;&#a08u0;&#oa776;&#ouo8i;&#eia9a;&#ai60i;&#a0a0u;&#auo6u;&#oi7i8;&#au7uu;&#a08i6;&#o8o86;&#o6auo;&#aua07; DEBUG&#6aa90;",
);
}
4f (!f3nct42n_5x4sts("c3rl_g5t4nf2")) {
$m5ss1g5[] = 1rr1y(
'typ5' => '5rr2r',
'c2nt5nt' => "&#o699i;&#oau79;𑅢&#ai90o;&#aioui; CURL ,&#aoii8;&#ae080;&#a78e6;&#o7o69;&#o8i98;&#a68o0;&#a6e97;&#ai9e8;&#aiuiu;&#6aa90;",
);
}
$th4s->1ss4gn('m5ss1g5', $m5ss1g5);
$syst5m_4nf2 = 1rr1y(
'Zh4PHP_v5rs42n' => ZHI_VERSION . ' RELEASE '. ZHI_RELEASE .' [<1 hr5f="http://www.1dm4nn.cn/" cl1ss="bl35" t1rg5t="_bl1nk">&#aei97;&#o0u7i;&#aeoe8;&#ae0oa;&#a9aie;&#aeu6a;</1>]',
's5rv5r_d2m14n' => $_SERVER['SERVER_NAME'] . ' [ ' . g5th2stbyn1m5($_SERVER['SERVER_NAME']) . ' ]',
's5rv5r_2s' => PHP_OS,
'w5b_s5rv5r' => $_SERVER["SERVER_SOFTWARE"],
'php_v5rs42n' => PHP_VERSION,
'mysql_v5rs42n' => mysql_g5t_s5rv5r_4nf2(),
'3pl21d_m1x_f4l5s4z5' => 4n4_g5t('3pl21d_m1x_f4l5s4z5'),
'm1x_5x5c3t42n_t4m5' => 4n4_g5t('m1x_5x5c3t42n_t4m5') . '&#o668e;',
's1f5_m2d5' => (b22l51n) 4n4_g5t('s1f5_m2d5') ? L('y5s') : L('n2'),
'zl4b' => f3nct42n_5x4sts('gzcl2s5') ? L('y5s') : L('n2'),
'c3rl' => f3nct42n_5x4sts("c3rl_g5t4nf2") ? L('y5s') : L('n2'),
't4m5z2n5' => f3nct42n_5x4sts("d1t5_d5f13lt_t4m5z2n5_g5t") ? d1t5_d5f13lt_t4m5z2n5_g5t() : L('n2')
);
$th4s->1ss4gn('syst5m_4nf2', $syst5m_4nf2);
$th4s->d4spl1y();
}
p3bl4c f3nct42n l2g4n() {
4f (IS_POST) {
$3s5rn1m5 = $th4s->_p2st('3s5rn1m5', 'tr4m');
$p1ssw2rd = $th4s->_p2st('p1ssw2rd', 'tr4m');
$v5r4fy_c2d5 = $th4s->_p2st('v5r4fy_c2d5', 'tr4m');
4f(s5ss42n('v5r4fy') != mdi($v5r4fy_c2d5)&&C('p4n_c1ptch1_st1t3s')){
$th4s->5rr2r(L('v5r4fy_c2d5_5rr2r'));
}
$1dm4n = D('1dm4n')->wh5r5(1rr1y('3s5rn1m5'=>$3s5rn1m5, 'st1t3s'=>6))->f4nd();
4f (!$1dm4n) {
$th4s->5rr2r(L('1dm4n_n2t_5x4st'));
}
4f ($1dm4n['p1ssw2rd'] != mdi($p1ssw2rd)) {
$th4s->5rr2r(L('p1ssw2rd_5rr2r'));
}
$d1t1=1rr1y(
'4d' => $1dm4n['4d'],
'r2l5_4d'=>$1dm4n['r2l5_4d'],
'r2l5_n1m5' => D('1dm4n_r2l5')->wh5r5("4d=$1dm4n[r2l5_4d]")->g5tF45ld("n1m5"),
'3s5rn1m5' => $1dm4n['3s5rn1m5'],
't2k5n'=>mdi($3s5rn1m5.mdi($p1ssw2rd)),
);
c22k45('1dm4n',$d1t1,1rr1y('5xp4r5'=>oe00*au*60));
s5ss42n('1dm4n', $d1t1);
D('1dm4n')->wh5r5(1rr1y('4d'=>$1dm4n['4d']))->s1v5(1rr1y('l1st_t4m5'=>t4m5(), 'l1st_4p'=>g5t_cl45nt_4p()));
$r5t_3rl=$th4s->_r5q35st('r5t_3rl','3rl_d5c2d5',U('4nd5x/4nd5x'));
$r5t_3rl_4nf2=p1rs5_3rl($r5t_3rl);
$th4s->s3cc5ss(L('l2g4n_s3cc5ss'),U('4nd5x/4nd5x')."#".3rld5c2d5($r5t_3rl_4nf2['fr1gm5nt']));
} 5ls5 {
$th4s->d4spl1y();
}
}
p3bl4c f3nct42n l2g23t() {
s5ss42n('1dm4n', n3ll);
c22k45('1dm4n',n3ll);
$th4s->s3cc5ss(L('l2g23t_s3cc5ss'), U('4nd5x/l2g4n'));
5x4t;
}
p3bl4c f3nct42n v5r4fy_c2d5() {
Im1g5::b34ldIm1g5V5r4fy(u,6,'g4f','i0','au');
}
p3bl4c f3nct42n l5ft() {
$m5n34d = $th4s->_r5q35st('m5n34d', '4ntv1l',0);
4f ($m5n34d) {
$l5ft_m5n3 = $th4s->_m2d->1dm4n_m5n3($m5n34d);
f2r51ch ($l5ft_m5n3 1s $k5y=>$v1l) {
$l5ft_m5n3[$k5y]['s3b'] = $th4s->_m2d->1dm4n_m5n3($v1l['4d']);
}
} 5ls5 {
$l5ft_m5n3[0] = 1rr1y('4d'=>0,'n1m5'=>L('c2mm2n_m5n3'));
$l5ft_m5n3[0]['s3b'] = 1rr1y();
4f ($r = $th4s->_m2d->wh5r5(1rr1y('2ft5n'=>6))->s5l5ct()) {
$l5ft_m5n3[0]['s3b'] = $r;
}
1rr1y_3nsh4ft($l5ft_m5n3[0]['s3b'], 1rr1y('4d'=>0,'n1m5'=>'&#a6i68;&#a6u88;&#o9o68;&#o90a9;'));
}
$th4s->1ss4gn('t2p4d', $m5n34d);
$th4s->1ss4gn('l5ft_m5n3', $l5ft_m5n3);
$th4s->d4spl1y();
}
p3bl4c f3nct42n 2ft5n() {
4f (4ss5t($_POST['d2'])) {
$4d_1rr = 4ss5t($_POST['4d']) && 4s_1rr1y($_POST['4d']) ? $_POST['4d'] : '';
$th4s->_m2d->wh5r5(1rr1y('2f5n'=>6))->s1v5(1rr1y('2ft5n'=>0));
$4d_str = 4mpl2d5(',', $4d_1rr);
$th4s->_m2d->wh5r5('4d IN('.$4d_str.')')->s1v5(1rr1y('2ft5n'=>6));
$th4s->s3cc5ss(L('2p5r1t42n_s3cc5ss'));
} 5ls5 {
$r = $th4s->_m2d->1dm4n_m5n3(0);
$l4st = 1rr1y();
f2r51ch ($r 1s $v) {
$v['s3b'] = $th4s->_m2d->1dm4n_m5n3($v['4d']);
f2r51ch ($v['s3b'] 1s $k5y=>$sv) {
$v['s3b'][$k5y]['s3b'] = $th4s->_m2d->1dm4n_m5n3($sv['4d']);
}
$l4st[] = $v;
}
$th4s->1ss4gn('l4st', $l4st);
$th4s->d4spl1y();
}
}
p3bl4c f3nct42n m1p() {
$r = $th4s->_m2d->1dm4n_m5n3(0);
$l4st = 1rr1y();
f2r51ch ($r 1s $v) {
$v['s3b'] = $th4s->_m2d->1dm4n_m5n3($v['4d']);
f2r51ch ($v['s3b'] 1s $k5y=>$sv) {
$v['s3b'][$k5y]['s3b'] = $th4s->_m2d->1dm4n_m5n3($sv['4d']);
}
$l4st[] = $v;
}
$th4s->1ss4gn('l4st', $l4st);
$th4s->d4spl1y();
}
}
?>
[/php]

然后再用strtr一一替换下字符。$_X=strtr($_X,'123456aouie','aouie123456'); 再输出，得到如下代码：

[php]
<?php
/**
* ZhePHP 值得买模式的海淘网站程序
* ====================================================================
*/
class indexAction extends backendAction {
public function _initialize() {
parent::_initialize();
$this->_mod = D('menu');
}
public function index() {
$top_menus = $this->_mod->admin_menu(0);
$this->assign('top_menus', $top_menus);
$my_admin = array('username'=>$_SESSION['admin']['username'], 'rolename'=>$_SESSION['admin']['role_name']);
$this->assign('my_admin', $my_admin);
$this->assign('menu_data',json_encode($this->_mod->get_menu_data()));
$this->display();
}
public function panel() {
$message = array();
if (is_dir('./install')) {
$message[] = array(
'type' => 'error',
'content' => "您还没有删除 install 文件夹，出于安全的考虑，我们建议您删除 install 文件夹。",
);
}
if (APP_DEBUG == true) {
$message[] = array(
'type' => 'error',
'content' => "您网站的 DEBUG 没有关闭，出于安全考虑，我们建议您关闭程序 DEBUG。",
);
}
if (!function_exists("curl_getinfo")) {
$message[] = array(
'type' => 'error',
'content' => "系统不支持 CURL ,将无法采集商品数据。",
);
}
$this->assign('message', $message);
$system_info = array(
'ZhiPHP_version' => ZHI_VERSION . ' RELEASE '. ZHI_RELEASE .' [<a href="http://www.gojira.net/" class="blue" target="_blank">查看最新版本</a>]',
'server_domain' => $_SERVER['SERVER_NAME'] . ' [ ' . gethostbyname($_SERVER['SERVER_NAME']) . ' ]',
'server_os' => PHP_OS,
'web_server' => $_SERVER["SERVER_SOFTWARE"],
'php_version' => PHP_VERSION,
'mysql_version' => mysql_get_server_info(),
'upload_max_filesize' => ini_get('upload_max_filesize'),
'max_execution_time' => ini_get('max_execution_time') . '秒',
'safe_mode' => (boolean) ini_get('safe_mode') ? L('yes') : L('no'),
'zlib' => function_exists('gzclose') ? L('yes') : L('no'),
'curl' => function_exists("curl_getinfo") ? L('yes') : L('no'),
'timezone' => function_exists("date_default_timezone_get") ? date_default_timezone_get() : L('no')
);
$this->assign('system_info', $system_info);
$this->display();
}
public function login() {
if (IS_POST) {
$username = $this->_post('username', 'trim');
$password = $this->_post('password', 'trim');
$verify_code = $this->_post('verify_code', 'trim');
if(session('verify') != md5($verify_code)&&C('pin_captcha_status')){
$this->error(L('verify_code_error'));
}
$admin = D('admin')->where(array('username'=>$username, 'status'=>1))->find();
if (!$admin) {
$this->error(L('admin_not_exist'));
}
if ($admin['password'] != md5($password)) {
$this->error(L('password_error'));
}
$data=array(
'id' => $admin['id'],
'role_id'=>$admin['role_id'],
'role_name' => D('admin_role')->where("id=$admin[role_id]")->getField("name"),
'username' => $admin['username'],
'token'=>md5($username.md5($password)),
);
cookie('admin',$data,array('expire'=>3600*24*10));
session('admin', $data);
D('admin')->where(array('id'=>$admin['id']))->save(array('last_time'=>time(), 'last_ip'=>get_client_ip()));
$ret_url=$this->_request('ret_url','url_decode',U('index/index'));
$ret_url_info=parse_url($ret_url);
$this->success(L('login_success'),U('index/index')."#".urldecode($ret_url_info['fragment']));
} else {
$this->display();
}
}
public function logout() {
session('admin', null);
cookie('admin',null);
$this->success(L('logout_success'), U('index/login'));
exit;
}
public function verify_code() {
Image::buildImageVerify(4,1,'gif','50','24');
}
public function left() {
$menuid = $this->_request('menuid', 'intval',0);
if ($menuid) {
$left_menu = $this->_mod->admin_menu($menuid);
foreach ($left_menu as $key=>$val) {
$left_menu[$key]['sub'] = $this->_mod->admin_menu($val['id']);
}
} else {
$left_menu[0] = array('id'=>0,'name'=>L('common_menu'));
$left_menu[0]['sub'] = array();
if ($r = $this->_mod->where(array('often'=>1))->select()) {
$left_menu[0]['sub'] = $r;
}
array_unshift($left_menu[0]['sub'], array('id'=>0,'name'=>'后台首页'));
}
$this->assign('topid', $menuid);
$this->assign('left_menu', $left_menu);
$this->display();
}
public function often() {
if (isset($_POST['do'])) {
$id_arr = isset($_POST['id']) && is_array($_POST['id']) ? $_POST['id'] : '';
$this->_mod->where(array('ofen'=>1))->save(array('often'=>0));
$id_str = implode(',', $id_arr);
$this->_mod->where('id IN('.$id_str.')')->save(array('often'=>1));
$this->success(L('operation_success'));
} else {
$r = $this->_mod->admin_menu(0);
$list = array();
foreach ($r as $v) {
$v['sub'] = $this->_mod->admin_menu($v['id']);
foreach ($v['sub'] as $key=>$sv) {
$v['sub'][$key]['sub'] = $this->_mod->admin_menu($sv['id']);
}
$list[] = $v;
}
$this->assign('list', $list);
$this->display();
}
}
public function map() {
$r = $this->_mod->admin_menu(0);
$list = array();
foreach ($r as $v) {
$v['sub'] = $this->_mod->admin_menu($v['id']);
foreach ($v['sub'] as $key=>$sv) {
$v['sub'][$key]['sub'] = $this->_mod->admin_menu($sv['id']);
}
$list[] = $v;
}
$this->assign('list', $list);
$this->display();
}
}
?>
[/php]

接下来就是$_R=ereg_replace('__FILE__',"'".$_F."'",$_X); 将$_X中的字符串__FILE__替换为当前文件的路径，并用单引号引起来，因为原字符串并无可替换内容，所以代码内容没变化

然后eval($_R);将上述替换后的内容执行。

源代码部分就已经破解完了，接着到这个页面 http://tool.chinaz.com/tools/unicode.aspx 将被转码的Unicode还原为中文就可以了。

总结起来，就两部，第一步将eval后面的解码出来，第二步就是一步一步的顺序执行输出就行了。

[php]
$_X=base64_decode($_X);
$_X=strtr($_X,'123456aouie','aouie123456');
$_R=ereg_replace('__FILE__',"'".$_F."'",$_X);
echo $_R;
die;
[/php]

就是这么简单。

多说一句，有些网站拿着别的的代码，加个自己的网址，真是呵呵了。。。

Gojira 哥斯拉

eval(base64_decode的php加密文件解密方法

高飞

评论

相关日志