2

ここでこの質問をすることができるかどうかはわかりませんが、次のようになります。

理解できないJavaScriptブロックがあります。

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それは何のために使われますか？そのようなコードはどのように書くことができますか？

4

1 に答える 1

9

それは難読化されたJavaScriptです。

どこから来たのかわからない場合は、サイトがハッキングされた可能性が高く、このJavaScriptは悪意があります。

それは何のために使われますか？そのようなコードはどのように書くことができますか？

コードを非表示にするために使用されます。理由は異なる場合があります。そのようなことで自分のコードを保護できると考える人もいます。ただし、以下に示すように、これは無駄です。もう1つの使用例は、ハッカーがコードを検出から隠すことです。インターネットで見つけたスクリプトを頻繁に使用する人は、このコードが無効であることに気付かず、使用したいスクリプトの一部であると考えるかもしれません。さらに、同じ理由で悪意のあるスクリプトの自動検出を妨げます。

それを行う方法については、この質問をチェックしてください：JavaScriptを難読化するにはどうすればよいですか？

どういうわけか難読化されていないコード：

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        u = "www.",
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        x = "mk",
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        l = q + p,
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                var f = c || {}, b = f.url_blog || window.location.host,
                    g = f.srcBlank || "http://1.bp.blogspot.com/-htG7vy9vIAA/Tp0KrMUdoWI/AAAAAAAABAU/e7XkFtErqsU/s1600/grey.gif",
                    d = f.scrthumbSize || 50,
                    e = f.summaryLength || 0;
                (function (j) {
                    var h = j("#ajax-search-form"),
                        k = h.find(":text");
                    h.append('<div id="search-result"></div>');
                    var i = j("#search-result");
                    h.on("submit", function () {
                        var m = k.val();
                        i.show().html("Loading...");
                        j.ajax({
                            url: "http://" + b + "/feeds/posts/summary?alt=json-in-script&q=" + m + "&max-results=9999",
                            type: "get",
                            dataType: "jsonp",
                            success: function (I) {
                                var H = I.feed.entry,
                                    E, D, G, F, A = "";
                                if (H !== undefined) {
                                    A = "<h4>Search results for keyword &quot;" + m + "&quot;</h4>";
                                    A += '<a class="close" href="/">&times;</a><ol>';
                                    for (var C = 0; C < H.length; C++) {
                                        var n = new RegExp(m, "ig"),
                                            G = H[C].title.$t.replace(n, "<mark>" + m + "</mark>");
                                        for (var B = 0; B < H[C].link.length; B++) {
                                            if (H[C].link[B].rel == "alternate") {
                                                F = H[C].link[B].href
                                            }
                                        }
                                        if ("content" in H[C]) {
                                            E = H[C].content.$t
                                        } else {
                                            if ("summary" in H[C]) {
                                                E = H[C].summary.$t
                                            } else {
                                                E = ""
                                            }
                                        }
                                        E = E.replace(/<\S[^>]*>/g, "");
                                        if (E.length > e) {
                                            E = E.substring(0, e) + "..."
                                        }
                                        E = E.replace(n, "<mark>" + m + "</mark>");
                                        if ("media$thumbnail" in H[C]) {
                                            D = H[C].media$thumbnail.url.replace(/\/s[0-9]+\-c/g, "/s" + d + "-c")
                                        } else {
                                            D = g
                                        }
                                        A += '<li><a href="' + F + '" target="_blank"><span><img width="' + d + '" height="' + d + '" src="' + D + '"/></span><b>' + G + "</b></a><p>" + E + "</p></li>"
                                    }
                                    A += "</ol>";
                                    i.html(A)
                                } else {
                                    i.html('<a class="close" href="/">&times;</a><strong>No result!</strong>')
                                }
                            },
                            error: function () {
                                i.html('<a class="close" href="/">&times;</a><strong>Error loading feed.</strong>')
                            }
                        });
                        return false
                    });
                    h.on("click", ".close", function () {
                        i.fadeOut();
                        return false
                    })
                })(jQuery)
            };
            return function (b) {
                a(b)
            }
        })();
        window.rccpostsx = (function () {
            var a = function (A) {
                var d = A || {}, h = d.url_blog || window.location.host,
                    n = d.numpostx || 8,
                    g = d.id_cintainrp || "#rcentpost",
                    e = d.thumbSize || 70,
                    c = d.contjumlah || 100,
                    f = d.limitspy || 4,
                    b = d.intervalspy || 4000,
                    m = d.tickspeed || 1000,
                    j = d.animatedRecentPost || false,
                    k = d.cmtext || "Comments",
                    i = d.pBlank || "http://1.bp.blogspot.com/-htG7vy9vIAA/Tp0KrMUdoWI/AAAAAAAABAU/e7XkFtErqsU/s1600/grey.gif";
                $.ajax({
                    url: "http://" + h + "/feeds/posts/default?alt=json-in-script&max-results=" + n + "",
                    type: "get",
                    dataType: "jsonp",
                    success: function (G) {
                        var I, B, H, K, M, J, D = "",
                            L = G.feed.entry;
                        if (L !== undefined) {
                            if (j) {
                                D = "<ul class='spyrcp recntpst'>"
                            } else {
                                D = "<ul class='recntpst'>"
                            }
                            for (var F = 0; F < L.length; F++) {
                                for (var E = 0; E < L[F].link.length; E++) {
                                    if (L[F].link[E].rel == "alternate") {
                                        I = L[F].link[E].href;
                                        break
                                    }
                                }
                                for (var C = 0; C < L[F].link.length; C++) {
                                    if (L[F].link[C].rel == "replies" && L[F].link[C].type == "text/html") {
                                        H = L[F].link[C].title.split(" ")[0];
                                        break
                                    }
                                }
                                if ("content" in L[F]) {
                                    K = L[F].content.$t
                                } else {
                                    if ("summary" in L[F]) {
                                        K = L[F].summary.$t
                                    } else {
                                        K = ""
                                    }
                                }
                                if ("media$thumbnail" in L[F]) {
                                    M = L[F].media$thumbnail.url.replace(/\/s[0-9]+\-c/g, "/s" + e + "-c")
                                } else {
                                    M = i
                                }
                                K = K.replace(/<\S[^>]*>/g, "");
                                if (K.length > c) {
                                    K = K.substring(0, c) + "..."
                                }
                                B = L[F].title.$t;
                                J = L[F].published.$t.substring(0, 10), J = J.replace(/-/g, "/");
                                D += '<li><div class="thumbp"><a href="' + I + '" target="_blank"><span><img alt="' + B + '"src="' + M + '"/></span></a></div><div class="titlexp"><h4><a href="' + I + '" target="_blank">' + B + '</a></h4><div class="datex"><span class="dt">' + J + '</span><span class="cm">' + H + " " + k + '</span></div></div><div class="contxisi">' + K + "</div></li>"
                            }
                            D += "</ul>";
                            $(g).html(D);
                            (function (N) {
                                N.fn.simpleSpy = function (O, Q, P) {
                                    O = O || 4;
                                    Q = Q || 5000;
                                    P = P || 1000;
                                    return this.each(function () {
                                        var X = N(this),
                                            W = true,
                                            V = [],
                                            U = O,
                                            R = X.find("> li:first").height(),
                                            T = 0;

                                        function S() {
                                            if (W) {
                                                var Y = N(V[U]).css({
                                                    height: 0,
                                                    opacity: 0
                                                }).prependTo(X);
                                                X.find("> li:last").animate({
                                                    opacity: 0
                                                }, P, function () {
                                                    Y.animate({
                                                        height: R
                                                    }, P).animate({
                                                        opacity: 1
                                                    }, P);
                                                    N(this).remove()
                                                });
                                                U++;
                                                if (U >= T) {
                                                    U = 0
                                                }
                                            }
                                            setTimeout(S, Q)
                                        }
                                        X.find("> li").each(function () {
                                            V.push("<li>" + N(this).html() + "</li>")
                                        });
                                        T = V.length;
                                        X.wrap('<div class="spyWrapper" />').parent().css({
                                            height: R * O
                                        });
                                        X.find("> li").filter(":gt(" + (O - 1) + ")").remove();
                                        X.bind("stop", function () {
                                            W = false
                                        }).bind("start", function () {
                                            W = true
                                        });
                                        S()
                                    })
                                }
                            })(jQuery);
                            jQuery(function () {
                                if (j) {
                                    jQuery("ul.spyrcp").simpleSpy(f, b, m).bind("mouseenter", function () {
                                        jQuery(this).trigger("stop")
                                    }).bind("mouseleave", function () {
                                        jQuery(this).trigger("start")
                                    })
                                }
                            })
                        } else {
                            $(g).html("<span>No result!</span>")
                        }
                    },
                    error: function () {
                        $(g).html("<strong>Error Loading Feed!</strong>")
                    }
                })
            };
            return function (b) {
                a(b)
            }
        })();
        window.rccommnetsx = (function () {
            var a = function (B) {
                var e = B || {}, k = e.url_blog || window.location.host,
                    c = e.id_containrc || "#rcentcomnets",
                    m = e.numComments || 6,
                    j = e.avatarSize || 60,
                    i = e.animatedRecentcomments || false,
                    b = e.limitspyrkm || 4,
                    h = e.intervalspyrkm || 4000,
                    g = e.tickspeedrkm || 1000,
                    f = e.characters || 100,
                    A = e.defaultAvatar || "http://4.bp.blogspot.com/-AEWksK942OE/UFiyLzXJhiI/AAAAAAAAFKE/jBegaGPClxI/s70/user-anonymous-icon.png",
                    n = e.maxfeeds || 50,
                    d = e.adminBlog || "";
                $.ajax({
                    url: "http://" + k + "/feeds/comments/default?alt=json-in-script",
                    type: "get",
                    dataType: "jsonp",
                    success: function (Q) {
                        var I, K = Q.feed.entry;
                        if (K !== undefined) {
                            I = "<ul class='rcomnetspy'>";
                            ntotal = 0;
                            for (var H = 0; H < n; H++) {
                                var G, M, J, C, L, E;
                                if (H == K.length) {
                                    break
                                }
                                if (ntotal >= m) {
                                    break
                                }
                                var P = K[H];
                                for (var F = 0; F < P.link.length; F++) {
                                    if (P.link[F].rel == "alternate") {
                                        G = P.link[F].href
                                    }
                                }
                                for (var O = 0; O < P.author.length; O++) {
                                    M = P.author[O].name.$t;
                                    J = P.author[O].gd$image.src
                                }
                                if (M != d && ntotal < m) {
                                    ntotal++;
                                    I += "<li>";
                                    if (J == "http://img1.blogblog.com/img/blank.gif") {
                                        C = A
                                    } else {
                                        C = J.replace(/\/s[0-9]+(\-c|\/)/, "/s" + j + "$1")
                                    }
                                    var E = (P.author[0].uri) ? P.author[0].uri.$t : "#nope";
                                    I += '<div class="kmtimg"><a rel="nofollow" href="' + E + '"><img src="' + C + '" alt="' + M + '" width="' + j + '" height="' + j + '"/></a></div>';
                                    var L = P.gd$extendedProperty[1].value;
                                    I += '<div class="ketkomt"><a rel="nofollow" href="' + G + '">' + M + "</a> <span>" + L + "</span></div>";
                                    var N = P.content.$t;
                                    var D = N.replace(/(<([^>]+)>)/gi, "");
                                    if (D != "" && D.length > f) {
                                        D = D.substring(0, f);
                                        D += "…"
                                    } else {
                                        D = D
                                    }
                                    I += '<p class="komtsum">' + D + "</p>";
                                    I += "</li>"
                                }
                            }
                            I += "</ul>";
                            $(c).html(I);
                            (function (R) {
                                R.fn.simpleSpyRkm = function (S, U, T) {
                                    S = S || 4;
                                    U = U || 5000;
                                    T = T || 1000;
                                    return this.each(function () {
                                        var ab = R(this),
                                            aa = true,
                                            Z = [],
                                            Y = S,
                                            V = ab.find("> li:first").height(),
                                            X = 0;

                                        function W() {
                                            if (aa) {
                                                var ac = R(Z[Y]).css({
                                                    height: 0,
                                                    opacity: 0
                                                }).prependTo(ab);
                                                ab.find("> li:last").animate({
                                                    opacity: 0
                                                }, T, function () {
                                                    ac.animate({
                                                        height: V
                                                    }, T).animate({
                                                        opacity: 1
                                                    }, T);
                                                    R(this).remove()
                                                });
                                                Y++;
                                                if (Y >= X) {
                                                    Y = 0
                                                }
                                            }
                                            setTimeout(W, U)
                                        }
                                        ab.find("> li").each(function () {
                                            Z.push("<li>" + R(this).html() + "</li>")
                                        });
                                        X = Z.length;
                                        ab.wrap('<div class="spyWrapperrkm" />').parent().css({
                                            height: V * S
                                        });
                                        ab.find("> li").filter(":gt(" + (S - 1) + ")").remove();
                                        ab.bind("stop", function () {
                                            aa = false
                                        }).bind("start", function () {
                                            aa = true
                                        });
                                        W()
                                    })
                                }
                            })(jQuery);
                            jQuery(function () {
                                if (i) {
                                    jQuery("ul.rcomnetspy").simpleSpyRkm(b, h, g).bind("mouseenter", function () {
                                        jQuery(this).trigger("stop")
                                    }).bind("mouseleave", function () {
                                        jQuery(this).trigger("start")
                                    })
                                }
                            })
                        } else {
                            $(c).html("<span>No result!</span>")
                        }
                    },
                    error: function () {
                        $(c).html("<strong>Error Loading Feed!</strong>")
                    }
                })
            };
            return function (b) {
                a(b)
            }
        })();
        window.breakingnews = (function () {
            var a = function (d) {
                var g = d || {}, b = g.url_blog || window.location.host,
                    f = g.breakingpostx || 8,
                    e = g.id_breaking || "#isibreakingnews",
                    h = g.animatedBreaking || true,
                    c = g.breakingcmtext || "Comments";
                $.ajax({
                    url: "http://" + b + "/feeds/posts/default?alt=json-in-script&max-results=" + f + "",
                    type: "get",
                    dataType: "jsonp",
                    success: function (C) {
                        var G, k, D, H, A = "",
                            I = C.feed.entry;
                        if (I !== undefined) {
                            A = "<ul>";
                            for (var E = 0; E < I.length; E++) {
                                for (var B = 0; B < I[E].link.length; B++) {
                                    if (I[E].link[B].rel == "alternate") {
                                        G = I[E].link[B].href;
                                        break
                                    }
                                }
                                for (var m = 0; m < I[E].link.length; m++) {
                                    if (I[E].link[m].rel == "replies" && I[E].link[m].type == "text/html") {
                                        D = I[E].link[m].title.split(" ")[0];
                                        break
                                    }
                                }
                                k = I[E].title.$t;
                                H = I[E].published.$t.substring(0, 10);
                                H = H.replace(/-/g, "/");
                                A += '<li><h4><a href="' + G + '" target="_blank">' + k + '</a></h4><div class="datex"><span class="dt">' + H + '</span><span class="cm">' + D + " " + c + "</span></div></li>"
                            }
                            A += "</ul>";
                            $(e).html(A);
                            if (h) {
                                function F() {
                                    $("#isibreakingnews ul li:first").animate({
                                        opacity: 0
                                    }, 200, function () {
                                        $(this).appendTo($("#isibreakingnews ul")).css("opacity", 1)
                                    })
                                }
                                var n = setInterval(function () {
                                    F()
                                }, 3000);
                                $(e).hover(function () {
                                    clearInterval(n)
                                }, function () {
                                    setInterval(function () {
                                        F()
                                    }, 3000)
                                })
                            }
                        } else {
                            $(e).html("<span>No result!</span>")
                        }
                    },
                    error: function () {
                        $(e).html("<strong>Error Loading Feed!</strong>")
                    }
                })
            };
            return function (b) {
                a(b)
            }
        })()
    } else {
        $(z).append('<div class="errorx"><h1>Please Don&#39;t Remove or change Credit Link</h1></div>');
        $(".errorx").css({
            position: "fixed",
            top: "0",
            padding: "150px 0 0 0",
            "font-size": "120%",
            "z-index": "9999",
            "background-color": "black",
            width: "100%",
            height: "100%",
            color: "white"
        })
    }
});

編集

難読化を解除する方法に関する質問へ：

必要なツールは1つだけで、それがブラウザの開発コンソールです。たとえば、Firebugです。

次に、上記のコードで。の呼び出しを検索しますeval()。ここでは、1回だけ呼び出され、複数回呼び出されることもあります（再帰呼び出しも発生する可能性があります）。eval()の各出現をのようなものに置き換えますconsole.log()。そうすれば、コードを実行する代わりに、コンソールに出力されるだけです。

次に、 http：//jsbeautifier.org/などのオンラインjs-beautifierを実行すると、上記のコードが得られます。

于 2013-01-10T09:24:41.137 に答える