在前面一篇文章(http://www.hexiao.cn/blog/index.php?job=art&articleid=a_20060730_130422)中, 提到了 關于IE中的 js.edcode的加密問題. 由于要使用這些加密后的信息,就要解密,在網絡上找了一個js版本的解密程序, 由于要在java中使用,就把他轉化為java代碼了, 解密js.encode的java代碼如下:
?
//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));
?}
}
現在可以得到需要的信息了. 呵呵