includes/utils.js

   1 /*
   2  * Copyright 2015 Ketmar Dark <ketmar@ketmar.no-ip.org>
   3  * Portions copyright 2010, Erik Vold
   4  * Contributors: See contributors list in install.rdf and CREDITS
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * Note that this license applies only to the Greasemonkey extension source
  14  * files, not to the user scripts which it runs. User scripts are licensed
  15  * separately by their authors.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * The above copyright notice and this permission notice shall be included in all
  26  * copies or substantial portions of the Software.
  27  */
  28 ////////////////////////////////////////////////////////////////////////////////
  29 // string aString: A string of data to be hashed.
  30 // string aAlg: optional; the hash algorithm to be used; possible values are: MD2, MD5, SHA1, SHA256, SHA384, and SHA512; defaults to SHA1
  31 // string aCharset: optional; the charset used by the passed string; defaults to UTF-8
  32 function cryptoHash (aString, aAlg, aCharset) {
  33   const PR_UINT32_MAX = 0xffffffff; // this tells updateFromStream to read the entire string
  34
  35   let str = ""+aString;
  36   let alg = (""+(aAlg||"SHA1")).trim().toUpperCase();
  37   let charset = (""+(aCharset||"UTF-8")).trim();
  38
  39   let chashObj = Cc["@mozilla.org/security/hash;1"].createInstance(Ci.nsICryptoHash);
  40
  41   try {
  42     chashObj.initWithString(alg);
  43   } catch (e) {
  44     logError("invalid hash algorithm: '"+aAlg+"'");
  45     throw new Error("invalid hash algorithm: '"+aAlg+"'");
  46   }
  47
  48   let uniconvObj = Cc["@mozilla.org/intl/scriptableunicodeconverter"].createInstance(Ci.nsIScriptableUnicodeConverter);
  49   try {
  50     uniconvObj.charset = charset;
  51   } catch (e) {
  52     logError("invalid charset: '"+aCharset+"'");
  53     throw new Error("invalid charset: '"+aCharset+"'");
  54   }
  55
  56   if (str) chashObj.updateFromStream(uniconvObj.convertToInputStream(str), PR_UINT32_MAX);
  57   let hash = chashObj.finish(false); // hash as raw octets
  58   return [("0"+hash.charCodeAt(i).toString(16)).slice(-2) for (i in hash)].join("");
  59 }
  60 addExport("cryptoHash", cryptoHash);
  61
  62
  63 ////////////////////////////////////////////////////////////////////////////////
  64 function calcFileSha512 (fname) {
  65   let fl = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
  66   fl.initWithPath(fname);
  67   let istream = Cc["@mozilla.org/network/file-input-stream;1"].createInstance(Ci.nsIFileInputStream);
  68   // open for reading
  69   istream.init(fl, 0x01, 0400, istream.CLOSE_ON_EOF); // 0x01: PR_RDONLY
  70   let chan = Cc["@mozilla.org/security/hash;1"].createInstance(Ci.nsICryptoHash);
  71   chan.init(chan.SHA512);
  72   // this tells updateFromStream to read the entire file
  73   const PR_UINT32_MAX = 0xffffffff;
  74   chan.updateFromStream(istream, PR_UINT32_MAX);
  75   // pass false here to get binary data back
  76   let hash = chan.finish(false);
  77   return [("0"+hash.charCodeAt(i).toString(16)).slice(-2) for (i in hash)].join("");
  78 }
  79 addExport("calcFileSha512", calcFileSha512);
  80
  81
  82 ////////////////////////////////////////////////////////////////////////////////
  83 function uri2re (uri) {
  84   uri = uri.replace(/^\s+/, "").replace(/\s+$/, "");
  85   if (uri == "") return null;
  86   if (uri == "*") return null;
  87   // regexp?
  88   if (uri.length >= 2 && uri.charCodeAt(0) == 47 && uri.charCodeAt(uri.length-1) == 47) {
  89     if (uri.length < 3) return null;
  90     return new RegExp(uri.substring(1, uri.length-1), "i");
  91   }
  92   // convert glob to regexp
  93   let re = "^";
  94   for (let f = 0; f < uri.length; ++f) {
  95     switch (uri[f]) {
  96       case "*": re += ".*?"; break; // any, non-greedy
  97       case ".": case "?": case "^": case "$": case "+":
  98       case "{": case "}": case "[": case "]": case "|":
  99       case "(": case ")": case "\\":
 100         re += "\\"+uri[f];
 101         break;
 102       case " ": break; // ignore spaces
 103       default: re += uri[f]; break;
 104     }
 105   }
 106   re += "$";
 107   //if (guerillaOptions.debugCache) conlog("uri:["+uri+"]  re: ["+re+"]");
 108   return new RegExp(re, "i");
 109 }
 110 addExport("uri2re", uri2re);
 111
 112
 113 ////////////////////////////////////////////////////////////////////////////////
 114 function buildRelFile (fl, path) {
 115   if (!fl) return null;
 116   let res = fl.clone();
 117   for (let n of path.split("/")) {
 118     if (!n || n == ".") continue;
 119     if (n == "..") {
 120       res = res.parent;
 121       if (!res) return null;
 122     } else {
 123       res.append(n);
 124     }
 125   }
 126   return res;
 127 }
 128 addExport("buildRelFile", buildRelFile);