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- // 移除自执行函数和全局变量挂载逻辑,改为直接定义并导出
- const base64map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
- // 直接定义 Crypto 对象(不再依赖 window 或 exports)
- const Crypto = {};
- // Crypto 工具方法
- 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 (Crypto.util.rotl(n, 8) & 16711935) | (Crypto.util.rotl(n, 24) & 4278255360);
- }
- for (let i = 0; i < n.length; i++) {
- n[i] = Crypto.util.endian(n[i]);
- }
- return n;
- },
- randomBytes: function (n) {
- const bytes = [];
- for (; n > 0; n--) {
- bytes.push(Math.floor(Math.random() * 256));
- }
- return bytes;
- },
- bytesToWords: function (bytes) {
- const words = [];
- for (let i = 0, b = 0; i < bytes.length; i++, b += 8) {
- words[b >>> 5] |= (bytes[i] & 255) << (24 - (b % 32));
- }
- return words;
- },
- wordsToBytes: function (words) {
- const bytes = [];
- for (let b = 0; b < words.length * 32; b += 8) {
- bytes.push((words[b >>> 5] >>> (24 - (b % 32))) & 255);
- }
- return bytes;
- },
- bytesToHex: function (bytes) {
- const hex = [];
- for (let i = 0; i < bytes.length; i++) {
- hex.push((bytes[i] >>> 4).toString(16));
- hex.push((bytes[i] & 15).toString(16));
- }
- return hex.join('');
- },
- hexToBytes: function (hex) {
- const bytes = [];
- for (let c = 0; c < hex.length; c += 2) {
- bytes.push(parseInt(hex.substr(c, 2), 16));
- }
- return bytes;
- },
- bytesToBase64: function (bytes) {
- if (typeof btoa === 'function') {
- return btoa(Crypto.charenc.Binary.bytesToString(bytes));
- }
- const base64 = [];
- for (let i = 0; i < bytes.length; i += 3) {
- const triplet = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2];
- for (let j = 0; j < 4; j++) {
- if (i * 8 + j * 6 <= bytes.length * 8) {
- base64.push(base64map.charAt((triplet >>> (6 * (3 - j))) & 63));
- } else {
- base64.push('=');
- }
- }
- }
- return base64.join('');
- },
- base64ToBytes: function (base64) {
- if (typeof atob === 'function') {
- return Crypto.charenc.Binary.stringToBytes(atob(base64));
- }
- base64 = base64.replace(/[^A-Z0-9+\/]/gi, '');
- const bytes = [];
- for (let i = 0, imod4 = 0; i < base64.length; imod4 = ++i % 4) {
- if (imod4 === 0) continue;
- bytes.push(
- ((base64map.indexOf(base64.charAt(i - 1)) & (Math.pow(2, -2 * imod4 + 8) - 1)) << (imod4 * 2)) |
- (base64map.indexOf(base64.charAt(i)) >>> (6 - imod4 * 2))
- );
- }
- return bytes;
- }
- };
- // 字符编码模块
- Crypto.charenc = {};
- // UTF-8 编码
- Crypto.charenc.UTF8 = {
- stringToBytes: function (str) {
- return Crypto.charenc.Binary.stringToBytes(unescape(encodeURIComponent(str)));
- },
- bytesToString: function (bytes) {
- return decodeURIComponent(escape(Crypto.charenc.Binary.bytesToString(bytes)));
- }
- };
- // Binary 编码
- Crypto.charenc.Binary = {
- stringToBytes: function (str) {
- const bytes = [];
- for (let i = 0; i < str.length; i++) {
- bytes.push(str.charCodeAt(i) & 255);
- }
- return bytes;
- },
- bytesToString: function (bytes) {
- const str = [];
- for (let i = 0; i < bytes.length; i++) {
- str.push(String.fromCharCode(bytes[i]));
- }
- return str.join('');
- }
- };
- // 关键:导出 Crypto 供外部导入
- export default Crypto;
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