mirror of https://github.com/gchq/CyberChef.git
310 lines
9.1 KiB
JavaScript
Executable File
310 lines
9.1 KiB
JavaScript
Executable File
/**
|
|
* Operating system operations.
|
|
*
|
|
* @author n1474335 [n1474335@gmail.com]
|
|
* @copyright Crown Copyright 2016
|
|
* @license Apache-2.0
|
|
*
|
|
* @namespace
|
|
*/
|
|
var OS = module.exports = {
|
|
|
|
/**
|
|
* Parse UNIX file permissions operation.
|
|
*
|
|
* @param {string} input
|
|
* @param {Object[]} args
|
|
* @returns {string}
|
|
*/
|
|
runParseUnixPerms: function(input, args) {
|
|
var perms = {
|
|
d : false, // directory
|
|
sl : false, // symbolic link
|
|
np : false, // named pipe
|
|
s : false, // socket
|
|
cd : false, // character device
|
|
bd : false, // block device
|
|
dr : false, // door
|
|
sb : false, // sticky bit
|
|
su : false, // setuid
|
|
sg : false, // setgid
|
|
ru : false, // read user
|
|
wu : false, // write user
|
|
eu : false, // execute user
|
|
rg : false, // read group
|
|
wg : false, // write group
|
|
eg : false, // execute group
|
|
ro : false, // read other
|
|
wo : false, // write other
|
|
eo : false // execute other
|
|
},
|
|
d = 0,
|
|
u = 0,
|
|
g = 0,
|
|
o = 0,
|
|
output = "",
|
|
octal = null,
|
|
textual = null;
|
|
|
|
if (input.search(/\s*[0-7]{1,4}\s*/i) === 0) {
|
|
// Input is octal
|
|
octal = input.match(/\s*([0-7]{1,4})\s*/i)[1];
|
|
|
|
if (octal.length === 4) {
|
|
d = parseInt(octal[0], 8);
|
|
u = parseInt(octal[1], 8);
|
|
g = parseInt(octal[2], 8);
|
|
o = parseInt(octal[3], 8);
|
|
} else {
|
|
if (octal.length > 0) u = parseInt(octal[0], 8);
|
|
if (octal.length > 1) g = parseInt(octal[1], 8);
|
|
if (octal.length > 2) o = parseInt(octal[2], 8);
|
|
}
|
|
|
|
perms.su = d >> 2 & 0x1;
|
|
perms.sg = d >> 1 & 0x1;
|
|
perms.sb = d & 0x1;
|
|
|
|
perms.ru = u >> 2 & 0x1;
|
|
perms.wu = u >> 1 & 0x1;
|
|
perms.eu = u & 0x1;
|
|
|
|
perms.rg = g >> 2 & 0x1;
|
|
perms.wg = g >> 1 & 0x1;
|
|
perms.eg = g & 0x1;
|
|
|
|
perms.ro = o >> 2 & 0x1;
|
|
perms.wo = o >> 1 & 0x1;
|
|
perms.eo = o & 0x1;
|
|
} else if (input.search(/\s*[dlpcbDrwxsStT-]{1,10}\s*/) === 0) {
|
|
// Input is textual
|
|
textual = input.match(/\s*([dlpcbDrwxsStT-]{1,10})\s*/)[1];
|
|
|
|
switch (textual[0]) {
|
|
case "d":
|
|
perms.d = true;
|
|
break;
|
|
case "l":
|
|
perms.sl = true;
|
|
break;
|
|
case "p":
|
|
perms.np = true;
|
|
break;
|
|
case "s":
|
|
perms.s = true;
|
|
break;
|
|
case "c":
|
|
perms.cd = true;
|
|
break;
|
|
case "b":
|
|
perms.bd = true;
|
|
break;
|
|
case "D":
|
|
perms.dr = true;
|
|
break;
|
|
}
|
|
|
|
if (textual.length > 1) perms.ru = textual[1] === "r";
|
|
if (textual.length > 2) perms.wu = textual[2] === "w";
|
|
if (textual.length > 3) {
|
|
switch (textual[3]) {
|
|
case "x":
|
|
perms.eu = true;
|
|
break;
|
|
case "s":
|
|
perms.eu = true;
|
|
perms.su = true;
|
|
break;
|
|
case "S":
|
|
perms.su = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (textual.length > 4) perms.rg = textual[4] === "r";
|
|
if (textual.length > 5) perms.wg = textual[5] === "w";
|
|
if (textual.length > 6) {
|
|
switch (textual[6]) {
|
|
case "x":
|
|
perms.eg = true;
|
|
break;
|
|
case "s":
|
|
perms.eg = true;
|
|
perms.sg = true;
|
|
break;
|
|
case "S":
|
|
perms.sg = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (textual.length > 7) perms.ro = textual[7] === "r";
|
|
if (textual.length > 8) perms.wo = textual[8] === "w";
|
|
if (textual.length > 9) {
|
|
switch (textual[9]) {
|
|
case "x":
|
|
perms.eo = true;
|
|
break;
|
|
case "t":
|
|
perms.eo = true;
|
|
perms.sb = true;
|
|
break;
|
|
case "T":
|
|
perms.sb = true;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
return "Invalid input format.\nPlease enter the permissions in either octal (e.g. 755) or textual (e.g. drwxr-xr-x) format.";
|
|
}
|
|
|
|
output += "Textual representation: " + OS._permsToStr(perms);
|
|
output += "\nOctal representation: " + OS._permsToOctal(perms);
|
|
|
|
// File type
|
|
if (textual) {
|
|
output += "\nFile type: " + OS._ftFromPerms(perms);
|
|
}
|
|
|
|
// setuid, setgid
|
|
if (perms.su) {
|
|
output += "\nThe setuid flag is set";
|
|
}
|
|
if (perms.sg) {
|
|
output += "\nThe setgid flag is set";
|
|
}
|
|
|
|
// sticky bit
|
|
if (perms.sb) {
|
|
output += "\nThe sticky bit is set";
|
|
}
|
|
|
|
// Permission matrix
|
|
output += "\n\n +---------+-------+-------+-------+\n" +
|
|
" | | User | Group | Other |\n" +
|
|
" +---------+-------+-------+-------+\n" +
|
|
" | Read | " + (perms.ru ? "X" : " ") + " | " + (perms.rg ? "X" : " ") + " | " + (perms.ro ? "X" : " ") + " |\n" +
|
|
" +---------+-------+-------+-------+\n" +
|
|
" | Write | " + (perms.wu ? "X" : " ") + " | " + (perms.wg ? "X" : " ") + " | " + (perms.wo ? "X" : " ") + " |\n" +
|
|
" +---------+-------+-------+-------+\n" +
|
|
" | Execute | " + (perms.eu ? "X" : " ") + " | " + (perms.eg ? "X" : " ") + " | " + (perms.eo ? "X" : " ") + " |\n" +
|
|
" +---------+-------+-------+-------+\n";
|
|
|
|
return output;
|
|
},
|
|
|
|
|
|
/**
|
|
* Given a permissions object dictionary, generates a textual permissions string.
|
|
*
|
|
* @private
|
|
* @param {Object} perms
|
|
* @returns {string}
|
|
*/
|
|
_permsToStr: function(perms) {
|
|
var str = "",
|
|
type = "-";
|
|
|
|
if (perms.d) type = "d";
|
|
if (perms.sl) type = "l";
|
|
if (perms.np) type = "p";
|
|
if (perms.s) type = "s";
|
|
if (perms.cd) type = "c";
|
|
if (perms.bd) type = "b";
|
|
if (perms.dr) type = "D";
|
|
|
|
str = type;
|
|
|
|
str += perms.ru ? "r" : "-";
|
|
str += perms.wu ? "w" : "-";
|
|
if (perms.eu && perms.su) {
|
|
str += "s";
|
|
} else if (perms.su) {
|
|
str += "S";
|
|
} else if (perms.eu) {
|
|
str += "x";
|
|
} else {
|
|
str += "-";
|
|
}
|
|
|
|
str += perms.rg ? "r" : "-";
|
|
str += perms.wg ? "w" : "-";
|
|
if (perms.eg && perms.sg) {
|
|
str += "s";
|
|
} else if (perms.sg) {
|
|
str += "S";
|
|
} else if (perms.eg) {
|
|
str += "x";
|
|
} else {
|
|
str += "-";
|
|
}
|
|
|
|
str += perms.ro ? "r" : "-";
|
|
str += perms.wo ? "w" : "-";
|
|
if (perms.eo && perms.sb) {
|
|
str += "t";
|
|
} else if (perms.sb) {
|
|
str += "T";
|
|
} else if (perms.eo) {
|
|
str += "x";
|
|
} else {
|
|
str += "-";
|
|
}
|
|
|
|
return str;
|
|
},
|
|
|
|
|
|
/**
|
|
* Given a permissions object dictionary, generates an octal permissions string.
|
|
*
|
|
* @private
|
|
* @param {Object} perms
|
|
* @returns {string}
|
|
*/
|
|
_permsToOctal: function(perms) {
|
|
var d = 0,
|
|
u = 0,
|
|
g = 0,
|
|
o = 0;
|
|
|
|
if (perms.su) d += 4;
|
|
if (perms.sg) d += 2;
|
|
if (perms.sb) d += 1;
|
|
|
|
if (perms.ru) u += 4;
|
|
if (perms.wu) u += 2;
|
|
if (perms.eu) u += 1;
|
|
|
|
if (perms.rg) g += 4;
|
|
if (perms.wg) g += 2;
|
|
if (perms.eg) g += 1;
|
|
|
|
if (perms.ro) o += 4;
|
|
if (perms.wo) o += 2;
|
|
if (perms.eo) o += 1;
|
|
|
|
return d.toString() + u.toString() + g.toString() + o.toString();
|
|
},
|
|
|
|
|
|
/**
|
|
* Given a permissions object dictionary, returns the file type.
|
|
*
|
|
* @private
|
|
* @param {Object} perms
|
|
* @returns {string}
|
|
*/
|
|
_ftFromPerms: function(perms) {
|
|
if (perms.d) return "Directory";
|
|
if (perms.sl) return "Symbolic link";
|
|
if (perms.np) return "Named pipe";
|
|
if (perms.s) return "Socket";
|
|
if (perms.cd) return "Character device";
|
|
if (perms.bd) return "Block device";
|
|
if (perms.dr) return "Door";
|
|
return "Regular file";
|
|
},
|
|
|
|
};
|