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- const Crypto = {};
- (function(){
- var base64map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
- var util = Crypto.util = {
-
- rotl: function (n, b) {
- return (n << b) | (n >>> (32 - b));
- },
-
- rotr: function (n, b) {
- return (n << (32 - b)) | (n >>> b);
- },
-
- endian: function (n) {
-
- if (n.constructor == Number) {
- return util.rotl(n, 8) & 0x00FF00FF |
- util.rotl(n, 24) & 0xFF00FF00;
- }
-
- for (var i = 0; i < n.length; i++)
- n[i] = util.endian(n[i]);
- return n;
- },
-
- randomBytes: function (n) {
- for (var bytes = []; n > 0; n--)
- bytes.push(Math.floor(Math.random() * 256));
- return bytes;
- },
-
- stringToBytes: function (str) {
- var bytes = [];
- for (var i = 0; i < str.length; i++)
- bytes.push(str.charCodeAt(i));
- return bytes;
- },
-
- bytesToString: function (bytes) {
- var str = [];
- for (var i = 0; i < bytes.length; i++)
- str.push(String.fromCharCode(bytes[i]));
- return str.join("");
- },
-
- stringToWords: function (str) {
- var words = [];
- for (var c = 0, b = 0; c < str.length; c++, b += 8)
- words[b >>> 5] |= str.charCodeAt(c) << (24 - b % 32);
- return words;
- },
-
- bytesToWords: function (bytes) {
- var words = [];
- for (var i = 0, b = 0; i < bytes.length; i++, b += 8)
- words[b >>> 5] |= bytes[i] << (24 - b % 32);
- return words;
- },
-
- wordsToBytes: function (words) {
- var bytes = [];
- for (var b = 0; b < words.length * 32; b += 8)
- bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF);
- return bytes;
- },
-
- bytesToHex: function (bytes) {
- var hex = [];
- for (var i = 0; i < bytes.length; i++) {
- hex.push((bytes[i] >>> 4).toString(16));
- hex.push((bytes[i] & 0xF).toString(16));
- }
- return hex.join("");
- },
-
- hexToBytes: function (hex) {
- var bytes = [];
- for (var c = 0; c < hex.length; c += 2)
- bytes.push(parseInt(hex.substr(c, 2), 16));
- return bytes;
- },
-
- bytesToBase64: function (bytes) {
-
-
- var base64 = [],
- overflow;
- for (var i = 0; i < bytes.length; i++) {
- switch (i % 3) {
- case 0:
- base64.push(base64map.charAt(bytes[i] >>> 2));
- overflow = (bytes[i] & 0x3) << 4;
- break;
- case 1:
- base64.push(base64map.charAt(overflow | (bytes[i] >>> 4)));
- overflow = (bytes[i] & 0xF) << 2;
- break;
- case 2:
- base64.push(base64map.charAt(overflow | (bytes[i] >>> 6)));
- base64.push(base64map.charAt(bytes[i] & 0x3F));
- overflow = -1;
- }
- }
-
- if (overflow != undefined && overflow != -1)
- base64.push(base64map.charAt(overflow));
-
- while (base64.length % 4 != 0) base64.push("=");
- return base64.join("");
- },
-
- base64ToBytes: function (base64) {
-
- if (typeof atob == "function") return util.stringToBytes(atob(base64));
-
- base64 = base64.replace(/[^A-Z0-9+\/]/ig, "");
- var bytes = [];
- for (var i = 0; i < base64.length; i++) {
- switch (i % 4) {
- case 1:
- bytes.push((base64map.indexOf(base64.charAt(i - 1)) << 2) |
- (base64map.indexOf(base64.charAt(i)) >>> 4));
- break;
- case 2:
- bytes.push(((base64map.indexOf(base64.charAt(i - 1)) & 0xF) << 4) |
- (base64map.indexOf(base64.charAt(i)) >>> 2));
- break;
- case 3:
- bytes.push(((base64map.indexOf(base64.charAt(i - 1)) & 0x3) << 6) |
- (base64map.indexOf(base64.charAt(i))));
- break;
- }
- }
- return bytes;
- }
- };
- Crypto.mode = {};
- })();
- module.exports = Crypto;
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