如何在C＃中對此進行解碼

Question

我在頁面源代碼中有這個

<script type="text/javascript">document.write(unescape(escapeall('%$3c%!6f%N62%A6a%H65%#63%]74%L20%P74%T79%]70%F65%A3d%B22%S61%L70%B70%L6c%B69%N63%O61%M74%U69%]6f%-6e%T2f%E78%V2d%Y73%$68%A6f%O63%A6b%@77%J61%L76%J65%M2d%K66%D6c%@61%A73%H68%*22%X20%K63%Q6c%#61%*73%K73%N3d%R22%U70%]6c%?61%T79%B65%!72%-5f%-73%{69%-7a%Y65%Y22%S20%D73%Z74%-79%P6c%N65%D3d%K22%J68%S65%W69%O67%?68%D74%O3a%N33%N30%X34%@70%R78%P22%W20%B64%X61%B74%I61%@3d%+22%A68%.74%T74%X70%$3a%B2f%}2f%T73%C74%@61%@74%R69%?63%Q2e%E61%A6b%U2e%Q66%C62%~63%]64%I6e%C2e%I6e%.65%A74%X2f%F72%I73%M72%B63%?2e%I70%V68%}70%?2f%.7a%K34%N4f%!47%Q35%J2f%K68%*61%V73%@68%Y2f%H37%?71%B6b%V62%B73%K33%I6e%[62%K2e%[73%B77%I66%V22%W3e%A3c%*70%B61%J72%J61%G6d%F20%L6e%Y61%E6d%*65%R3d%A22%B66%X6c%~61%X73%?68%I76%D61%~72%P73%P22%-20%}76%E61%E6c%.75%T65%D3d%A22%.26%O76%U69%-64%{65%N6f%D5f%[73%W72%F63%A3d%V68%[74%$74%Q70%[3a%H2f%A2f%@76%$69%[64%D65%#6f%+2e%W61%C6b%.2e%O66%V61%@63%-65%#62%V6f%+6f%V6b%M2e%Q63%?6f%U6d%W2f%+63%W66%~73%A2d%{61%L6b%Y2d%O61%P73%T68%J32%Y2f%A34%+32%G30%T32%~38%Q2f%C36%$36%X34%U2f%E31%]31%L36%#35%L34%U39%+39%*35%C38%W33%Z39%F37%*32%E38%W34%Y5f%#31%X38%+33%T30%Q32%E2e%+6d%S70%.34%Y26%.76%O69%[64%R65%G6f%~5f%P74%G69%S74%~6c%~65%K3d%!56%-69%[64%D26%K76%.3d%W31%$33%~33%{37%-22%}20%N2f%+3e%K3c%P70%@61%K72%#61%Y6d%V20%~6e%Y61%E6d%A65%{3d%G22%K61%[6c%M6c%$6f%N77%$6e%J65%R74%@77%W6f%M72%*6b%O69%J6e%!67%O22%I20%?76%W61%?6c%T75%!65%B3d%T22%-69%A6e%E74%B65%+72%}6e%L61%~6c%Q22%L20%M2f%!3e%#3c%K70%L61%]72%[61%P6d%F20%G6e%A61%+6d%M65%C3d%V22%J61%Y6c%O6c%U6f%#77%{66%M75%$6c%!6c%N73%J63%Z72%E65%L65%-6e%~22%U20%W76%}61%W6c%$75%K65%Q3d%J22%N74%V72%Y75%T65%]22%A20%~2f%W3e%T3c%@70%V61%D72%R61%H6d%@20%[6e%A61%]6d%~65%T3d%E22%~6d%~6f%T76%P69%N65%}22%}20%S76%Z61%H6c%~75%.65%S3d%K22%L68%M74%E74%G70%+3a%Z2f%?2f%H73%X74%R61%K74%I69%Q63%C2e%}61%E6b%T2e%W66%S62%U63%I64%J6e%#2e%T6e%J65%M74%R2f%]72%Y73%W72%*63%D2e%J70%Z68%+70%~2f%T7a%U34%$4f%.47%U35%J2f%V68%-61%S73%F68%[2f%S37%L71%R6b%V62%I73%U33%E6e%R62%-2e%F73%[77%C66%[22%A20%{2f%U3e%H3c%S2f%S6f%]62%A6a%M65%N63%B74%}3e')));</script>

我想用C＃解碼它，但我不知道如何，有人可以幫我嗎？

這是頁面源

function escapeall(str){

return str.replace(/([A-Z\~\!\@\#\$\*\{\}\[\]\-\+\.\?\<\>])/g,''); }

所以這是代碼，但沒有用

string todecode = "%C3c%Q6f%F62%A6a%!65%~63%M74%K20%L74%Y79%J70%#65%N3d%P22%V61%T70%@70%F6c%S69%+63%J61%?74%#69%O6f%@6e%O2f%@78%F2d%{73%.68%H6f%[63%V6b%Y77%D61%$76%Y65%P2d%*66%G6c%Z61%Z73%K68%@22%[20%M63%]6c%T61%A73%#73%-3d%Q22%B70%Y6c%S61%A79%V65%*72%}5f%L73%K69%G7a%K65%G22%?20%M64%K61%L74%@61%[3d%-22%K68%F74%K74%{70%H3a%+2f%G2f%.77%W77%N77%Y2e%Q64%T61%?69%.6c%+79%V6d%*6f%{74%B69%H6f%H6e%E2e%W63%$6f%E6d%O2f%V73%X77%A66%-2f%}76%{69%@64%E65%W6f%*2f%D78%E65%K35%X67%W6a%[72%Q5f%Y67%R69%S61%{6e%I74%$31%V37%T2d%.32%{5f%*73%!68%K6f%[72%F74%I66%K69%{6c%{6d%]73%I22%$3e%S3c%{70%V61%Q72%$61%B6d%!20%?6e%$61%A6d%P65%[3d%B22%]66%G6c%K61%H73%T68%S76%B61%Z72%K73%]22%J20%F76%.61%C6c%+75%H65%+3d%{22%T61%X64%-64%H69%Y74%A69%M6f%@6e%J61%O6c%F49%K6e%J66%R6f%U73%X3d%[30%@22%*20%A2f%P3e%$3c%K70%@61%X72%Z61%-6d%$20%+6e%+61%~6d%N65%R3d%K22%Y61%I6c%E6c%T6f%!77%V6e%I65%[74%U77%R6f%P72%J6b%E69%N6e%#67%+22%I20%X76%P61%F6c%Z75%Y65%S3d%W22%S69%!6e%C74%K65%P72%F6e%Z61%K6c%W22%X20%-2f%.3e%S3c%Q70%R61%-72%U61%Y6d%E20%K6e%O61%B6d%J65%~3d%J22%F61%U6c%Y6c%H6f%E77%.66%F75%I6c%H6c%Z73%A63%}72%}65%J65%H6e%U22%O20%N76%R61%U6c%V75%]65%[3d%O22%E74%K72%Y75%E65%.22%{20%P2f%L3e%H3c%+70%X61%+72%H61%X6d%L20%#6e%P61%]6d%?65%F3d%.22%A6d%$6f%#76%W69%K65%J22%#20%#76%K61%A6c%X75%.65%A3d%R22%$68%O74%?74%D70%T3a%~2f%U2f%@77%U77%H77%F2e%K64%T61%{69%*6c%B79%U6d%O6f%E74%Q69%Q6f%!6e%+2e%Y63%.6f%K6d%[2f%N73%D77%V66%?2f%L76%J69%Q64%.65%*6f%V2f%I78%~65%Y35%E67%Q6a%U72%K5f%U67%R69%I61%T6e%N74%F31%Z37%H2d%M32%~5f%A73%C68%+6f%E72%D74%M66%B69%T6c%C6d%@73%J22%{20%P2f%$3e%W3c%G2f%!6f%L62%X6a%X65%]63%K74%~3e";

        string replaced = Regex.Replace(todecode, @"([A-Z\~!\@#\$*{}[]-+.\?\<>])/g", "");

        string data = Uri.UnescapeDataString(replaced);

        textBoxPrint.Text += data + "";

感謝iande和OneSHOT，現在可以使用了...

Answer 1

只需在字符串上使用Uri.UnescapeDataString() 。

我的第一個建議是Uri.Unescpe似乎已過時，因此應改用靜態UnescaptDataString() 。

Answer 2

您可能已經知道了。

插入組中的每個第二個字符進行混淆。

%$3c%!6f%N62
 ^   ^   ^

以下正則表達式刪除所有為混淆替換插入的字符（/([[AZ\\~!\\@#\\$*{}[]-+.\\?\\<>])/g，''）; }

一旦使用上述正則表達式刪除了第二個字符，就可以使用@Oded Uri.UnescapeDataString（）中的答案

結果應為：

<object type="application/x-shockwave-flash" class="player_size" style="height:304px" data="http://static.ak.fbcdn.net/rsrc.php/z4OG5/hash/7qkbs3nb.swf"><param name="flashvars" value="&video_src=http://video.ak.facebook.com/cfs-ak-ash2/42028/664/116549958397284_18302.mp4&video_title=Vid&v=1337" /><param name="allownetworking" value="internal" /><param name="allowfullscreen" value="true" /><param name="movie" value="http://static.ak.fbcdn.net/rsrc.php/z4OG5/hash/7qkbs3nb.swf" /></object>

這是代碼：

        string todecode = "%C3c%Q6f%F62%A6a%!65%~63%M74%K20%L74%Y79%J70%#65%N3d%P22%V61%T70%@70%F6c%S69%+63%J61%?74%#69%O6f%@6e%O2f%@78%F2d%{73%.68%H6f%[63%V6b%Y77%D61%$76%Y65%P2d%*66%G6c%Z61%Z73%K68%@22%[20%M63%]6c%T61%A73%#73%-3d%Q22%B70%Y6c%S61%A79%V65%*72%}5f%L73%K69%G7a%K65%G22%?20%M64%K61%L74%@61%[3d%-22%K68%F74%K74%{70%H3a%+2f%G2f%.77%W77%N77%Y2e%Q64%T61%?69%.6c%+79%V6d%*6f%{74%B69%H6f%H6e%E2e%W63%$6f%E6d%O2f%V73%X77%A66%-2f%}76%{69%@64%E65%W6f%*2f%D78%E65%K35%X67%W6a%[72%Q5f%Y67%R69%S61%{6e%I74%$31%V37%T2d%.32%{5f%*73%!68%K6f%[72%F74%I66%K69%{6c%{6d%]73%I22%$3e%S3c%{70%V61%Q72%$61%B6d%!20%?6e%$61%A6d%P65%[3d%B22%]66%G6c%K61%H73%T68%S76%B61%Z72%K73%]22%J20%F76%.61%C6c%+75%H65%+3d%{22%T61%X64%-64%H69%Y74%A69%M6f%@6e%J61%O6c%F49%K6e%J66%R6f%U73%X3d%[30%@22%*20%A2f%P3e%$3c%K70%@61%X72%Z61%-6d%$20%+6e%+61%~6d%N65%R3d%K22%Y61%I6c%E6c%T6f%!77%V6e%I65%[74%U77%R6f%P72%J6b%E69%N6e%#67%+22%I20%X76%P61%F6c%Z75%Y65%S3d%W22%S69%!6e%C74%K65%P72%F6e%Z61%K6c%W22%X20%-2f%.3e%S3c%Q70%R61%-72%U61%Y6d%E20%K6e%O61%B6d%J65%~3d%J22%F61%U6c%Y6c%H6f%E77%.66%F75%I6c%H6c%Z73%A63%}72%}65%J65%H6e%U22%O20%N76%R61%U6c%V75%]65%[3d%O22%E74%K72%Y75%E65%.22%{20%P2f%L3e%H3c%+70%X61%+72%H61%X6d%L20%#6e%P61%]6d%?65%F3d%.22%A6d%$6f%#76%W69%K65%J22%#20%#76%K61%A6c%X75%.65%A3d%R22%$68%O74%?74%D70%T3a%~2f%U2f%@77%U77%H77%F2e%K64%T61%{69%*6c%B79%U6d%O6f%E74%Q69%Q6f%!6e%+2e%Y63%.6f%K6d%[2f%N73%D77%V66%?2f%L76%J69%Q64%.65%*6f%V2f%I78%~65%Y35%E67%Q6a%U72%K5f%U67%R69%I61%T6e%N74%F31%Z37%H2d%M32%~5f%A73%C68%+6f%E72%D74%M66%B69%T6c%C6d%@73%J22%{20%P2f%$3e%W3c%G2f%!6f%L62%X6a%X65%]63%K74%~3e";
        string replaced = Regex.Replace(todecode, @"([A-Z\~\!\@\#\$\*\{\}\[\]\-\+\.\?\<\>])", "");            
        string data = Uri.UnescapeDataString(replaced);
        textBoxPrint.Text += data + "";

但是請注意，正則表達式非常危險，因為它可以處理這種特殊的混淆情況。 如果您在十六進制編碼中使用任何大寫字母，則應用程序將在解碼時崩潰。

Answer 3

這應該為你工作

string todecode = "%C3c%Q6f%F62%A6a%!65%~63%M74%K20%L74%Y79%J70%#65%N3d%P22%V61%T70%@70%F6c%S69%+63%J61%?74%#69%O6f%@6e%O2f%@78%F2d%{73%.68%H6f%[63%V6b%Y77%D61%$76%Y65%P2d%*66%G6c%Z61%Z73%K68%@22%[20%M63%]6c%T61%A73%#73%-3d%Q22%B70%Y6c%S61%A79%V65%*72%}5f%L73%K69%G7a%K65%G22%?20%M64%K61%L74%@61%[3d%-22%K68%F74%K74%{70%H3a%+2f%G2f%.77%W77%N77%Y2e%Q64%T61%?69%.6c%+79%V6d%*6f%{74%B69%H6f%H6e%E2e%W63%$6f%E6d%O2f%V73%X77%A66%-2f%}76%{69%@64%E65%W6f%*2f%D78%E65%K35%X67%W6a%[72%Q5f%Y67%R69%S61%{6e%I74%$31%V37%T2d%.32%{5f%*73%!68%K6f%[72%F74%I66%K69%{6c%{6d%]73%I22%$3e%S3c%{70%V61%Q72%$61%B6d%!20%?6e%$61%A6d%P65%[3d%B22%]66%G6c%K61%H73%T68%S76%B61%Z72%K73%]22%J20%F76%.61%C6c%+75%H65%+3d%{22%T61%X64%-64%H69%Y74%A69%M6f%@6e%J61%O6c%F49%K6e%J66%R6f%U73%X3d%[30%@22%*20%A2f%P3e%$3c%K70%@61%X72%Z61%-6d%$20%+6e%+61%~6d%N65%R3d%K22%Y61%I6c%E6c%T6f%!77%V6e%I65%[74%U77%R6f%P72%J6b%E69%N6e%#67%+22%I20%X76%P61%F6c%Z75%Y65%S3d%W22%S69%!6e%C74%K65%P72%F6e%Z61%K6c%W22%X20%-2f%.3e%S3c%Q70%R61%-72%U61%Y6d%E20%K6e%O61%B6d%J65%~3d%J22%F61%U6c%Y6c%H6f%E77%.66%F75%I6c%H6c%Z73%A63%}72%}65%J65%H6e%U22%O20%N76%R61%U6c%V75%]65%[3d%O22%E74%K72%Y75%E65%.22%{20%P2f%L3e%H3c%+70%X61%+72%H61%X6d%L20%#6e%P61%]6d%?65%F3d%.22%A6d%$6f%#76%W69%K65%J22%#20%#76%K61%A6c%X75%.65%A3d%R22%$68%O74%?74%D70%T3a%~2f%U2f%@77%U77%H77%F2e%K64%T61%{69%*6c%B79%U6d%O6f%E74%Q69%Q6f%!6e%+2e%Y63%.6f%K6d%[2f%N73%D77%V66%?2f%L76%J69%Q64%.65%*6f%V2f%I78%~65%Y35%E67%Q6a%U72%K5f%U67%R69%I61%T6e%N74%F31%Z37%H2d%M32%~5f%A73%C68%+6f%E72%D74%M66%B69%T6c%C6d%@73%J22%{20%P2f%$3e%W3c%G2f%!6f%L62%X6a%X65%]63%K74%~3e";

            StringBuilder replaced = new StringBuilder();

            var i = 0;
            var skipChar = false;
            while (i<todecode.Length)
            {
                if (skipChar)
                    skipChar = false;
                else
                    replaced.Append(todecode.Substring(i, 1));

                skipChar = todecode.Substring(i, 1) == "%";

                i++;
            }

            string data = Uri.UnescapeDataString(replaced.ToString());

            textBoxPrint.Text += data + "";

OneSHOT