在前面一篇文章(http://www.hexiao.cn/blog/index.php?job=art&articleid=a_20060730_130422)中, 提到了 关于IE中的 js.edcode的加密问题. 由于要使用这些加密后的信息,就要解密,在网络上找了一个js版本的解密程序, 由于要在java中使用,就把他转化为java代码了, 解密js.encode的java代码如下:
//import java.util.regex.Matcher;
//import java.util.regex.Pattern;
/**
* Decode encode
* @author icess
* @blog http://blog.matrix.org.cn/page/icess
*/
public class EncodeDecode {
final int STATE_COPY_INPUT = 100;
final int STATE_READLEN = 101;
final int STATE_DECODE = 102;
final int STATE_UNESCAPE = 103;
int[] digits = new int[128];
int[][] transformed = new int[3][128];
int[] pick_encoding = { 1, 2, 0, 1, 2, 0, 2, 0, 0, 2, 0, 2, 1, 0, 2, 0, 1,
0, 2, 0, 1, 1, 2, 0, 0, 2, 1, 0, 2, 0, 0, 2, 1, 1, 0, 2, 0, 2, 0,
1, 0, 1, 1, 2, 0, 1, 0, 2, 1, 0, 2, 0, 1, 1, 2, 0, 0, 1, 1, 2, 0,
1, 0, 2 };
int[] rawData = { 0x64, 0x37, 0x69, 0x50, 0x7E, 0x2C, 0x22, 0x5A, 0x65,
0x4A, 0x45, 0x72, 0x61, 0x3A, 0x5B, 0x5E, 0x79, 0x66, 0x5D, 0x59,
0x75, 0x5B, 0x27, 0x4C, 0x42, 0x76, 0x45, 0x60, 0x63, 0x76, 0x23,
0x62, 0x2A, 0x65, 0x4D, 0x43, 0x5F, 0x51, 0x33, 0x7E, 0x53, 0x42,
0x4F, 0x52, 0x20, 0x52, 0x20, 0x63, 0x7A, 0x26, 0x4A, 0x21, 0x54,
0x5A, 0x46, 0x71, 0x38, 0x20, 0x2B, 0x79, 0x26, 0x66, 0x32, 0x63,
0x2A, 0x57, 0x2A, 0x58, 0x6C, 0x76, 0x7F, 0x2B, 0x47, 0x7B, 0x46,
0x25, 0x30, 0x52, 0x2C, 0x31, 0x4F, 0x29, 0x6C, 0x3D, 0x69, 0x49,
0x70, 0x3F, 0x3F, 0x3F, 0x27, 0x78, 0x7B, 0x3F, 0x3F, 0x3F, 0x67,
0x5F, 0x51, 0x3F, 0x3F, 0x3F, 0x62, 0x29, 0x7A, 0x41, 0x24, 0x7E,
0x5A, 0x2F, 0x3B, 0x66, 0x39, 0x47, 0x32, 0x33, 0x41, 0x73, 0x6F,
0x77, 0x4D, 0x21, 0x56, 0x43, 0x75, 0x5F, 0x71, 0x28, 0x26, 0x39,
0x42, 0x78, 0x7C, 0x46, 0x6E, 0x53, 0x4A, 0x64, 0x48, 0x5C, 0x74,
0x31, 0x48, 0x67, 0x72, 0x36, 0x7D, 0x6E, 0x4B, 0x68, 0x70, 0x7D,
0x35, 0x49, 0x5D, 0x22, 0x3F, 0x6A, 0x55, 0x4B, 0x50, 0x3A, 0x6A,
0x69, 0x60, 0x2E, 0x23, 0x6A, 0x7F, 0x09, 0x71, 0x28, 0x70, 0x6F,
0x35, 0x65, 0x49, 0x7D, 0x74, 0x5C, 0x24, 0x2C, 0x5D, 0x2D, 0x77,
0x27, 0x54, 0x44, 0x59, 0x37, 0x3F, 0x25, 0x7B, 0x6D, 0x7C, 0x3D,
0x7C, 0x23, 0x6C, 0x43, 0x6D, 0x34, 0x38, 0x28, 0x6D, 0x5E, 0x31,
0x4E, 0x5B, 0x39, 0x2B, 0x6E, 0x7F, 0x30, 0x57, 0x36, 0x6F, 0x4C,
0x54, 0x74, 0x34, 0x34, 0x6B, 0x72, 0x62, 0x4C, 0x25, 0x4E, 0x33,
0x56, 0x30, 0x56, 0x73, 0x5E, 0x3A, 0x68, 0x73, 0x78, 0x55, 0x09,
0x57, 0x47, 0x4B, 0x77, 0x32, 0x61, 0x3B, 0x35, 0x24, 0x44, 0x2E,
0x4D, 0x2F, 0x64, 0x6B, 0x59, 0x4F, 0x44, 0x45, 0x3B, 0x21, 0x5C,
0x2D, 0x37, 0x68, 0x41, 0x53, 0x36, 0x61, 0x58, 0x58, 0x7A, 0x48,
0x79, 0x22, 0x2E, 0x09, 0x60, 0x50, 0x75, 0x6B, 0x2D, 0x38, 0x4E,
0x29, 0x55, 0x3D, 0x3F };
public EncodeDecode() {
// System.out.println(rawData[0]);
init();
}
public String decode(String encodingString) {
// System.out.println("encodingString : " + encodingString);
String marker = "#@~^";
String at;
String encodingLable = null;
String unEncodingString = "";
int stringIndex = 0;
int scriptIndex = -1;
int unEncodingIndex = 0;
int unEncodinglength = 0;
int state = STATE_COPY_INPUT;
// int statePos = 0;
while (state != 0) {
// System.out.println("in the Swith statePos is :" + statePos +
// "State:" +state);
switch (state) {
case (STATE_COPY_INPUT):
scriptIndex = encodingString.indexOf(marker, stringIndex);
// System.out.println("scriptIndex1"+scriptIndex);
if (scriptIndex != -1) {
unEncodingString += encodingString.substring(stringIndex,
stringIndex + scriptIndex);
scriptIndex += marker.length();
state = STATE_READLEN;
} else {
stringIndex = stringIndex == 0 ? 0 : stringIndex;
unEncodingString += encodingString.substring(stringIndex,
encodingString.length());
state = 0;
}
break;
case (STATE_READLEN):
// System.out.println("scriptIndex"+scriptIndex);
encodingLable = encodingString.substring(scriptIndex,
scriptIndex + 6);
unEncodinglength = decodeBase64(encodingLable);
scriptIndex += (6 + "==".length());
state = STATE_DECODE;
break;
case (STATE_DECODE):
if (unEncodinglength == 0) {
stringIndex = scriptIndex + "DQgAAA==^#~@".length();
unEncodingIndex = 0;
state = STATE_COPY_INPUT;
break;
}
at = encodingString.substring(scriptIndex, scriptIndex + 1);
if (at == "@")
state = STATE_UNESCAPE;
else {
if (at.codePointAt(0) < 0xFF) {
unEncodingString += String
.valueOf((char) transformed[pick_encoding[unEncodingIndex % 64]][at
.codePointAt(0)]);
unEncodingIndex++;
} else {
unEncodingString += at;
}
scriptIndex++;
unEncodinglength--;
break;
}
case STATE_UNESCAPE:
unEncodingString += unescape(encodingString.substring(
++scriptIndex, scriptIndex + 1));
scriptIndex++;
unEncodinglength -= 2;
unEncodingIndex++;
state = STATE_DECODE;
break;
}
}
// System.out.println("unEncodingString : " + unEncodingString);
// Pattern pattern = Pattern.compile("JScript.Encode");
// Matcher matcher = pattern.matcher(unEncodingString);
// if(matcher.find()) {
// System.out.println("unEncodingString 1: " + unEncodingString);
// unEncodingString = unEncodingString.substring(0, matcher.start()) +
// matcher.group() + unEncodingString.substring(matcher.end());
// }
// System.out.println("EncodeDecode.decode : unEncodingString : " + unEncodingString);
return unEncodingString;
}
public int decodeBase64(String string) {
int val = 0;
val += (digits[string.codePointAt(0)] << 2);
val += (digits[string.codePointAt(1)] >> 4);
val += (digits[string.codePointAt(1)] & 0xf) << 12;
val += ((digits[string.codePointAt(2)] >> 2) << 8);
val += ((digits[string.codePointAt(2)] & 0x3) << 22);
val += (digits[string.codePointAt(3)] << 16);
return val;
}
public String unescape(String ch) { // no used, and no test
// System.out.println("dddd");
String escapes = "#&!*$";
String escaped = "\r\n<>@";
if (ch.codePointAt(0) > 126)
return ch;
int index = escapes.indexOf(ch);
if (index != -1)
return escaped.substring(index, index + 1);
return "?";
}
public void init() {
for (int i = 31; i <= 126; i++)
for (int j = 0; j < 3; j++)
transformed[j][rawData[(i - 31) * 3 + j]] = (i == 31) ? 9 : i;
for (int i = 0; i < 26; i++) {
digits['A' + i] = i;
digits['a' + i] = i + 26;
}
for (int i = 0; i < 10; i++)
digits['0' + i] = i + 52;
digits[0x2b] = 62;
digits[0x2f] = 63;
}
/**
* @param args
*/
public static void main(String[] args) {
// new EncodeDecode().decode("<script
// language='JScript.Encode'>#@~^SwAAAA==-mD~DK'B8vZfF~!0FyF/TFFFZXFR!F8)TvZc82qsq98,TfZ+!wF{T;F&q*Z2T!Z1ZAqZFl!bEiyRAAAA==^#~@</script>");
String plantext = new EncodeDecode()
.decode("#@~^SwAAAA==-mD~DK'B8vZfF~!0FyF/TFFFZXFR!F8)TvZc82qsq98,TfZ+!wF{T;F&q*Z2T!Z1ZAqZFl!bEiyRAAAA==^#~@");
System.out
.println(plantext
.equals("var ero='16031B08121C07110518011A06041E1F1D190D020F170C13140E00090B10150A';"));
System.out.println("0".codePointAt(0) + " " + (int) 'a' + " "
+ (int) 'A');
System.out.println("ididgigggi".indexOf("i", 1));
}
}
现在可以得到需要的信息了. 呵呵