spb/admin-ka

1/* This Source Code Form is subject to the terms of the Mozilla Public2 * License, v. 2.0. If a copy of the MPL was not distributed with this3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */45// From: http://hg.mozilla.org/mozilla-central/raw-file/ec10630b1a54/js/src/devtools/jint/sunspider/string-base64.js67import * as Log from './util/logging.js';89export default {10    /* Convert data (an array of integers) to a Base64 string. */11    toBase64Table: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split(''),12    base64Pad: '=',1314    encode(data) {15        "use strict";16        let result = '';17        const length = data.length;18        const lengthpad = (length % 3);19        // Convert every three bytes to 4 ascii characters.2021        for (let i = 0; i < (length - 2); i += 3) {22            result += this.toBase64Table[data[i] >> 2];23            result += this.toBase64Table[((data[i] & 0x03) << 4) + (data[i + 1] >> 4)];24            result += this.toBase64Table[((data[i + 1] & 0x0f) << 2) + (data[i + 2] >> 6)];25            result += this.toBase64Table[data[i + 2] & 0x3f];26        }2728        // Convert the remaining 1 or 2 bytes, pad out to 4 characters.29        const j = length - lengthpad;30        if (lengthpad === 2) {31            result += this.toBase64Table[data[j] >> 2];32            result += this.toBase64Table[((data[j] & 0x03) << 4) + (data[j + 1] >> 4)];33            result += this.toBase64Table[(data[j + 1] & 0x0f) << 2];34            result += this.toBase64Table[64];35        } else if (lengthpad === 1) {36            result += this.toBase64Table[data[j] >> 2];37            result += this.toBase64Table[(data[j] & 0x03) << 4];38            result += this.toBase64Table[64];39            result += this.toBase64Table[64];40        }4142        return result;43    },4445    /* Convert Base64 data to a string */46    /* eslint-disable comma-spacing */47    toBinaryTable: [48        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,49        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,50        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,51        52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1,52        -1, 0, 1, 2,  3, 4, 5, 6,  7, 8, 9,10, 11,12,13,14,53        15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,54        -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,55        41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-156    ],57    /* eslint-enable comma-spacing */5859    decode(data, offset = 0) {60        let dataLength = data.indexOf('=') - offset;61        if (dataLength < 0) { dataLength = data.length - offset; }6263        /* Every four characters is 3 resulting numbers */64        const resultLength = (dataLength >> 2) * 3 + Math.floor((dataLength % 4) / 1.5);65        const result = new Array(resultLength);6667        // Convert one by one.6869        let leftbits = 0; // number of bits decoded, but yet to be appended70        let leftdata = 0; // bits decoded, but yet to be appended71        for (let idx = 0, i = offset; i < data.length; i++) {72            const c = this.toBinaryTable[data.charCodeAt(i) & 0x7f];73            const padding = (data.charAt(i) === this.base64Pad);74            // Skip illegal characters and whitespace75            if (c === -1) {76                Log.Error("Illegal character code " + data.charCodeAt(i) + " at position " + i);77                continue;78            }7980            // Collect data into leftdata, update bitcount81            leftdata = (leftdata << 6) | c;82            leftbits += 6;8384            // If we have 8 or more bits, append 8 bits to the result85            if (leftbits >= 8) {86                leftbits -= 8;87                // Append if not padding.88                if (!padding) {89                    result[idx++] = (leftdata >> leftbits) & 0xff;90                }91                leftdata &= (1 << leftbits) - 1;92            }93        }9495        // If there are any bits left, the base64 string was corrupted96        if (leftbits) {97            const err = new Error('Corrupted base64 string');98            err.name = 'Base64-Error';99            throw err;100        }101102        return result;103    }104}; /* End of Base64 namespace */105