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Decodes JavaScript code similar to eval (function (P, A, C, K, E, D) {}).

Source: Internet
Author: User
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Reference: http://hi.baidu.com/xcb521/blog/item/2ac50dc6253c79d6d1006073.html

Here, Baidu access statistics code constructor is decoded as an example:

Baidu access statistics code JavaScript source code:
The red and bold parts will be modified.
Eval (function (P, A, C, K, E, D) {e = function (c) {return (C <? "": E (parseint (C/A) + (C = C % A)> 35? String. fromcharcode (C + 29): C. tostring (36)}; If (! ''. Replace (/^/, string) {While (c --) {d [E (c)] = K [c] | E (c )} k = [function (e) {return
D [e]}]; E = function () {return '// W +'}; C = 1 };While (c --) {If (K [c]) {P = P. Replace (New
Regexp ('// B' + E (c) + '// B', 'G'), K [c])} return P

} ('P
W (E, D, A, C, B) {5.r= 8.14 (E); 5.o= D; 5.d= A; 5.r= (8.E )? C :( C-2); 5.q= 0; 5. B = B + (8.E )? 0:-2); 5.x= 5.d[ 0]; 5.o= 5.d[ 5. d. C-1]} W. P. Y = P (B) {9
A = 15.16 (B-5.x) * 5. B/(5. O-5.x) + (8.E )? 2: 0); s (A> 5. B) {A = 5. B} 17
A}; W. p.18 = P () {9 A = 8. I ("K");. A = "1A"; a.6.z = 5. B + "7"; 5. r. J (a); 9
K = 8. I ("K");. J (k); K. A = "1B"; 9 J = 0; q (9G = 0; G <5. o. c; G + = 2) {9
B = 5.y( 5.o[ g]); 9 I = 5.o[ G + 1]; 9
F = 8. I ("K");. J (f); F. A = "U"; f.6.n = 5.r+ "7"; f.6.z = B + "7"; f.6.m = 5. b-B-1 + "7"; f.6.g = (J-1) + "7"; F. H = "& V;"; F. F = K; f.t = P () {5.a= "v"; 5. f.6.l = ""; 5. f. H = 5. t. L (3, 5. t. c); 5. f.6.g = 5.6.g; 5. f.6.m = S (5.6.m)-S (5. f.19) + "7"}; f.w = P () {5.a= "U"; 5. f.6.l = "Z"}; 9
E = 8. I ("K"); A. J (E); e.6.n = 5.r+ "7"; e.6.m = (8.E )? 5. B: 5. B + 3 + "7"; 9
C = I .10 (". "); F. T = "U" + I. L (0, c) + "// 11" + I. L (C + 1, I. c) + "// 12 & V;" + 5.o[ g]; S (G % 4 = 0) {S (I. L (C + 1, I. c) = "1" | I. L (C + 1, I. c) = "2") {e. A = "13"; e.6.g = (J-4) + "7"; E. H = I} n {e. A = "M"; e.6.g = (J-1) + "7"; E. H = I. L (C + 1, I. c)} n {e. A = "M"; e.6.g = (J-1) + "7"; E. H = ""} J + = 5.r+ (8.E )? -1:1)} 5.q= J + (8.E )? 1:-1); a.6.n = 5.q+ "7"; q (9
G = 0; G <5. d. C; G ++) {9 d = 5.y( 5.d[ g]); S (G! = 0 & G! = 5. d. C-1) {9
H = 8. I ("K"); A. J (h); H. A = "X"; h.6.n = (5. Q-(8.E )? 1:-1) + "7"; h.6.m = (5. b-D-1) + "7"} 9

E = 8. I ("K");. J (e); E. A = "1C"; e.6.n = "Y"; e.6.m = (5. b-D-2.) + "7"; e.6.g =-U + "7"; E. H = 5.d[ g] }}; ', 62,75, '| this | style | Px | document | Var | classname | charth | length | yl | all | ohit | left | innerhtml | createelement | appendchild | Div | substring | top | width | XL | function | chartw | barw | if | ID | bar | nbsp | chart | minpv | getpvheight | height |||||||||| | display | titx | else | maxpv | prototype | for | parent | parseint | onmouseover | 42 | barhl | onmouseout | Liney | 35px | none | indexof | u6708 | u65e5 | titxhl | getelementbyid | math | round | return | create | offsetheight | chart | hit | tity '. split ('|'), 0 ,{}));

Actually, this eval (function (P, A, C, K, E, D) {}) comes with the decoded function E ().
While (c --) {If (K [c]) {P = P. Replace (New
Regexp ('// B' + E (c) + '// B', 'G'), K [c])} return P


Every P produced by the while loop is the decoded function code. We delete the return P in the source code and do not need to return the result,
It is directly output in a text area, such as document. getelementbyid ("textareaid"). innertext = P.

Final code:
<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en"
Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>
<HTML xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Title> crack Baidu statistical constructor </title>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"
/>
<Meta http-equiv = "X-UA-compatible" content = "Ie = emulateie7"/>
<Meta name = "author" content = www.gemingcao.com
/>
<Meta name = "keywords" content = ""/>
<Meta name = "Description" content = ""/>
</Head>
<Body>
<Textarea id ="
Textareaid
"Rows =" 25"
Cols = "50"> </textarea>


<Script
Type = "text/javascrpt">


Eval (function (P, A, C, K, E, D) {e = function (c) {return (C <? "": E (parseint (C/A) + (C = C % A)> 35? String. fromcharcode (C + 29): C. tostring (36)}; If (! ''. Replace (/^/, string) {While (c --) {d [E (c)] = K [c] | E (c )} k = [function (e) {return
D [e]}]; E = function () {return '// W +'}; C = 1 };While (c --) {If (K [c]) {P = P. Replace (New
Regexp ('// B' + E (c) + '// B', 'G'), K [c]); document. getelementbyid ('
Textareaid'). Innertext = P;

}}} ('P

W (E, D, A, C, B) {5.r= 8.14 (E); 5.o= D; 5.d= A; 5.r= (8.E )? C :( C-2); 5.q= 0; 5. B = B + (8.E )? 0:-2); 5.x= 5.d[ 0]; 5.o= 5.d[ 5. d. C-1]} W. P. Y = P (B) {9
A = 15.16 (B-5.x) * 5. B/(5. O-5.x) + (8.E )? 2: 0); s (A> 5. B) {A = 5. B} 17
A}; W. p.18 = P () {9 A = 8. I ("K");. A = "1A"; a.6.z = 5. B + "7"; 5. r. J (a); 9
K = 8. I ("K");. J (k); K. A = "1B"; 9 J = 0; q (9G = 0; G <5. o. c; G + = 2) {9
B = 5.y( 5.o[ g]); 9 I = 5.o[ G + 1]; 9
F = 8. I ("K");. J (f); F. A = "U"; f.6.n = 5.r+ "7"; f.6.z = B + "7"; f.6.m = 5. b-B-1 + "7"; f.6.g = (J-1) + "7"; F. H = "& V;"; F. F = K; f.t = P () {5.a= "v"; 5. f.6.l = ""; 5. f. H = 5. t. L (3, 5. t. c); 5. f.6.g = 5.6.g; 5. f.6.m = S (5.6.m)-S (5. f.19) + "7"}; f.w = P () {5.a= "U"; 5. f.6.l = "Z"}; 9
E = 8. I ("K"); A. J (E); e.6.n = 5.r+ "7"; e.6.m = (8.E )? 5. B: 5. B + 3 + "7"; 9
C = I .10 (". "); F. T = "U" + I. L (0, c) + "// 11" + I. L (C + 1, I. c) + "// 12 & V;" + 5.o[ g]; S (G % 4 = 0) {S (I. L (C + 1, I. c) = "1" | I. L (C + 1, I. c) = "2") {e. A = "13"; e.6.g = (J-4) + "7"; E. H = I} n {e. A = "M"; e.6.g = (J-1) + "7"; E. H = I. L (C + 1, I. c)} n {e. A = "M"; e.6.g = (J-1) + "7"; E. H = ""} J + = 5.r+ (8.E )? -1:1)} 5.q= J + (8.E )? 1:-1); a.6.n = 5.q+ "7"; q (9
G = 0; G <5. d. C; G ++) {9 d = 5.y( 5.d[ g]); S (G! = 0 & G! = 5. d. C-1) {9
H = 8. I ("K"); A. J (h); H. A = "X"; h.6.n = (5. Q-(8.E )? 1:-1) + "7"; h.6.m = (5. b-D-1) + "7"} 9

E = 8. I ("K");. J (e); E. A = "1C"; e.6.n = "Y"; e.6.m = (5. b-D-2.) + "7"; e.6.g =-U + "7"; E. H = 5.d[ g] }}; ', 62,75, '| this | style | Px | document | Var | classname | charth | length | yl | all | ohit | left | innerhtml | createelement | appendchild | Div | substring | top | width | XL | function | chartw | barw | if | ID | bar | nbsp | chart | minpv | getpvheight | height |||||||||| | display | titx | else | maxpv | prototype | for | parent | parseint | onmouseover | 42 | barhl | onmouseout | Liney | 35px | none | indexof | u6708 | u65e5 | titxhl | getelementbyid | math | round | return | create | offsetheight | chart | hit | tity '. split ('|'), 0 ,{}));

</SCRIPT>


</Body>
</Html>

Save as an HTML file and run.
Format the JavaScript code in the text area. The Code is as follows:
Function Chart (E, D, A, C, B ){
This. Parent = Document. getelementbyid (E );
This. XL = D;
This. yl =;
This. barw = (document. All )? C: (C-2 );
This. chartw = 0;
This. charth = B + (document. All )? 0:-2 );
This. minpv = This. yl [0];
This. maxpv = This. yl [This. yl. Length-1]
}
Chart. Prototype. getpvheight = function (B ){
VaR A = math. Round (B-This. minpv) * This. charth/(this. maxpv-
This. minpv) + (document. All )? 2: 0 );
If (A> This. charth ){
A = This. charth
}
Return
};
Chart. Prototype. Create = function (){
VaR A = Document. createelement ("Div ");
A. classname = "chart ";
A. style. Height = This. charth + "PX ";
This. Parent. appendchild ();
VaR K = Document. createelement ("Div ");
A. appendchild (k );
K. classname = "hit ";
VaR J = 0;
For (var g = 0; G <this. XL. length; G + = 2 ){
VaR B = This. getpvheight (this. XL [g]);
VaR I = This. XL [G + 1];
VaR F = Document. createelement ("Div ");
A. appendchild (f );
F. classname = "bar ";
F. style. width = This. barw + "PX ";
F. style. Height = B + "PX ";
F. style. Top = This. charth-B-1 + "PX ";
F. style. Left = (J-1) + "PX ";
F. innerhtml = "& nbsp ;";
F. ohit = K;
F. onmouseover = function (){
This. classname = "barhl ";
This. ohit. style. Display = "";
This. ohit. innerhtml = This. Id. substring (3, this. Id. Length );
This. ohit. style. Left = This. style. Left;
This. ohit. style. Top = parseint (this. style. Top )-
Parseint (this. ohit. offsetheight) + "PX"
};
F. onmouseout = function (){
This. classname = "bar ";
This. ohit. style. Display = "NONE"
};
VaR E = Document. createelement ("Div ");
A. appendchild (E );
E. style. width = This. barw + "PX ";
E. style. Top = (document. All )? This. charth: This. charth + 3 +
"PX ";
VaR c = I. indexof (".");
F. ID = "bar" + I. substring (0, c) + "/u6708" + I. substring (C +
1, I. Length) + "/u65e5 & nbsp;" + this. XL [g];
If (G % 4 = 0 ){
If (I. substring (C + 1, I. Length) = "1" | I. substring (C +
1, I. Length) = "2 ")){
E. classname = "titxhl ";
E. style. Left = (J-4) + "PX ";
E. innerhtml = I
} Else {
E. classname = "titx ";
E. style. Left = (J-1) + "PX ";
E. innerhtml = I. substring (C + 1, I. length)
}
} Else {
E. classname = "titx ";
E. style. Left = (J-1) + "PX ";
E. innerhtml = ""
}
J + = This. barw + (document. All )? -1: 1)
}
This. chartw = J + (document. All )? 1:-1 );
A. style. width = This. chartw + "PX ";
For (var g = 0; G <this. yl. length; G ++ ){
VaR d = This. getpvheight (this. yl [g]);
If (G! = 0 & G! = This. yl. Length-1 ){
VaR H = Document. createelement ("Div ");
A. appendchild (h );
H. classname = "Liney ";
H. style. width = (this. chartw-(document. All )? 1:-1) +
"PX ";
H. style. Top = (this. charth-d-1) + "PX"
}
VaR E = Document. createelement ("Div ");
A. appendchild (E );
E. classname = "tity ";
E. style. width = "35px ";
E. style. Top = (this. charth-D-2) + "PX ";
E. style. Left =-42 + "PX ";
E. innerhtml = This. yl [g]
}
};

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Related Keywords:
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