/usr/lib/nodejs/openid/lib/base64.js is in node-openid 0.5.9-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | /* Base64 conversion functions
*
* Adaptions for node.js are Copyright (c) 2010 HÃ¥vard Stranden
*
* Copyright (c) 2010 Nick Galbreath
* http://code.google.com/p/stringencoders/source/browse/#svn/trunk/javascript
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* base64 encode/decode compatible with window.btoa/atob
*
* window.atob/btoa is a Firefox extension to convert binary data (the "b")
* to base64 (ascii, the "a").
*
* It is also found in Safari and Chrome. It is not available in IE.
*
* if (!window.btoa) window.btoa = base64.encode
* if (!window.atob) window.atob = base64.decode
*
* The original spec's for atob/btoa are a bit lacking
* https://developer.mozilla.org/en/DOM/window.atob
* https://developer.mozilla.org/en/DOM/window.btoa
*
* window.btoa and base64.encode takes a string where charCodeAt is [0,255]
* If any character is not [0,255], then an exception is thrown.
*
* window.atob and base64.decode take a base64-encoded string
* If the input length is not a multiple of 4, or contains invalid characters
* then an exception is thrown.
*
* -*- Mode: JS; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set sw=2 ts=2 et tw=80 :
*/
var base64 = {};
base64.PADCHAR = '=';
base64.ALPHA = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
base64.getbyte64 = function(s,i) {
// This is oddly fast, except on Chrome/V8.
// Minimal or no improvement in performance by using a
// object with properties mapping chars to value (eg. 'A': 0)
var idx = base64.ALPHA.indexOf(s.charAt(i));
if (idx == -1) {
throw "Cannot decode base64";
}
return idx;
}
base64.decode = function(s) {
// convert to string
s = "" + s;
var getbyte64 = base64.getbyte64;
var pads, i, b10;
var imax = s.length
if (imax == 0) {
return s;
}
if (imax % 4 != 0) {
throw "Cannot decode base64";
}
pads = 0
if (s.charAt(imax -1) == base64.PADCHAR) {
pads = 1;
if (s.charAt(imax -2) == base64.PADCHAR) {
pads = 2;
}
// either way, we want to ignore this last block
imax -= 4;
}
var x = [];
for (i = 0; i < imax; i += 4) {
b10 = (getbyte64(s,i) << 18) | (getbyte64(s,i+1) << 12) |
(getbyte64(s,i+2) << 6) | getbyte64(s,i+3);
x.push(String.fromCharCode(b10 >> 16, (b10 >> 8) & 0xff, b10 & 0xff));
}
switch (pads) {
case 1:
b10 = (getbyte64(s,i) << 18) | (getbyte64(s,i+1) << 12) | (getbyte64(s,i+2) << 6)
x.push(String.fromCharCode(b10 >> 16, (b10 >> 8) & 0xff));
break;
case 2:
b10 = (getbyte64(s,i) << 18) | (getbyte64(s,i+1) << 12);
x.push(String.fromCharCode(b10 >> 16));
break;
}
return x.join('');
}
base64.getbyte = function(s,i) {
var x = s.charCodeAt(i);
if (x > 255) {
throw "INVALID_CHARACTER_ERR: DOM Exception 5";
}
return x;
}
base64.encode = function(s) {
if (arguments.length != 1) {
throw "SyntaxError: Not enough arguments";
}
var padchar = base64.PADCHAR;
var alpha = base64.ALPHA;
var getbyte = base64.getbyte;
var i, b10;
var x = [];
// convert to string
s = "" + s;
var imax = s.length - s.length % 3;
if (s.length == 0) {
return s;
}
for (i = 0; i < imax; i += 3) {
b10 = (getbyte(s,i) << 16) | (getbyte(s,i+1) << 8) | getbyte(s,i+2);
x.push(alpha.charAt(b10 >> 18));
x.push(alpha.charAt((b10 >> 12) & 0x3F));
x.push(alpha.charAt((b10 >> 6) & 0x3f));
x.push(alpha.charAt(b10 & 0x3f));
}
switch (s.length - imax) {
case 1:
b10 = getbyte(s,i) << 16;
x.push(alpha.charAt(b10 >> 18) + alpha.charAt((b10 >> 12) & 0x3F) +
padchar + padchar);
break;
case 2:
b10 = (getbyte(s,i) << 16) | (getbyte(s,i+1) << 8);
x.push(alpha.charAt(b10 >> 18) + alpha.charAt((b10 >> 12) & 0x3F) +
alpha.charAt((b10 >> 6) & 0x3f) + padchar);
break;
}
return x.join('');
}
exports.base64 = base64;
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