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Commit Description:
change to encrypted cookies
Commit Description:
change to encrypted cookies
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node_modules/jszip/lib/base64.js
| 106 lines
| 3.3 KiB
| application/javascript
| JavascriptLexer
|
| r789 | 'use strict'; | |||
| var utils = require('./utils'); | ||||
| var support = require('./support'); | ||||
| // private property | ||||
| var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; | ||||
| // public method for encoding | ||||
| exports.encode = function(input) { | ||||
| var output = []; | ||||
| var chr1, chr2, chr3, enc1, enc2, enc3, enc4; | ||||
| var i = 0, len = input.length, remainingBytes = len; | ||||
| var isArray = utils.getTypeOf(input) !== "string"; | ||||
| while (i < input.length) { | ||||
| remainingBytes = len - i; | ||||
| if (!isArray) { | ||||
| chr1 = input.charCodeAt(i++); | ||||
| chr2 = i < len ? input.charCodeAt(i++) : 0; | ||||
| chr3 = i < len ? input.charCodeAt(i++) : 0; | ||||
| } else { | ||||
| chr1 = input[i++]; | ||||
| chr2 = i < len ? input[i++] : 0; | ||||
| chr3 = i < len ? input[i++] : 0; | ||||
| } | ||||
| enc1 = chr1 >> 2; | ||||
| enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); | ||||
| enc3 = remainingBytes > 1 ? (((chr2 & 15) << 2) | (chr3 >> 6)) : 64; | ||||
| enc4 = remainingBytes > 2 ? (chr3 & 63) : 64; | ||||
| output.push(_keyStr.charAt(enc1) + _keyStr.charAt(enc2) + _keyStr.charAt(enc3) + _keyStr.charAt(enc4)); | ||||
| } | ||||
| return output.join(""); | ||||
| }; | ||||
| // public method for decoding | ||||
| exports.decode = function(input) { | ||||
| var chr1, chr2, chr3; | ||||
| var enc1, enc2, enc3, enc4; | ||||
| var i = 0, resultIndex = 0; | ||||
| var dataUrlPrefix = "data:"; | ||||
| if (input.substr(0, dataUrlPrefix.length) === dataUrlPrefix) { | ||||
| // This is a common error: people give a data url | ||||
| // (data:image/png;base64,iVBOR...) with a {base64: true} and | ||||
| // wonders why things don't work. | ||||
| // We can detect that the string input looks like a data url but we | ||||
| // *can't* be sure it is one: removing everything up to the comma would | ||||
| // be too dangerous. | ||||
| throw new Error("Invalid base64 input, it looks like a data url."); | ||||
| } | ||||
| input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); | ||||
| var totalLength = input.length * 3 / 4; | ||||
| if(input.charAt(input.length - 1) === _keyStr.charAt(64)) { | ||||
| totalLength--; | ||||
| } | ||||
| if(input.charAt(input.length - 2) === _keyStr.charAt(64)) { | ||||
| totalLength--; | ||||
| } | ||||
| if (totalLength % 1 !== 0) { | ||||
| // totalLength is not an integer, the length does not match a valid | ||||
| // base64 content. That can happen if: | ||||
| // - the input is not a base64 content | ||||
| // - the input is *almost* a base64 content, with a extra chars at the | ||||
| // beginning or at the end | ||||
| // - the input uses a base64 variant (base64url for example) | ||||
| throw new Error("Invalid base64 input, bad content length."); | ||||
| } | ||||
| var output; | ||||
| if (support.uint8array) { | ||||
| output = new Uint8Array(totalLength|0); | ||||
| } else { | ||||
| output = new Array(totalLength|0); | ||||
| } | ||||
| while (i < input.length) { | ||||
| enc1 = _keyStr.indexOf(input.charAt(i++)); | ||||
| enc2 = _keyStr.indexOf(input.charAt(i++)); | ||||
| enc3 = _keyStr.indexOf(input.charAt(i++)); | ||||
| enc4 = _keyStr.indexOf(input.charAt(i++)); | ||||
| chr1 = (enc1 << 2) | (enc2 >> 4); | ||||
| chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); | ||||
| chr3 = ((enc3 & 3) << 6) | enc4; | ||||
| output[resultIndex++] = chr1; | ||||
| if (enc3 !== 64) { | ||||
| output[resultIndex++] = chr2; | ||||
| } | ||||
| if (enc4 !== 64) { | ||||
| output[resultIndex++] = chr3; | ||||
| } | ||||
| } | ||||
| return output; | ||||
| }; | ||||