/** * MD5哈希工具 * 用于Cookie上传时的数据校验 */ /** * 计算字符串的MD5哈希值 * @param {string} message - 要计算哈希的字符串 * @returns {string} - 32位小写MD5哈希值 */ function md5(message) { function rotateLeft(x, n) { return (x << n) | (x >>> (32 - n)); } function addUnsigned(x, y) { const x4 = x & 0x80000000; const y4 = y & 0x80000000; const x8 = x & 0x40000000; const y8 = y & 0x40000000; const result = (x & 0x3FFFFFFF) + (y & 0x3FFFFFFF); if (x8 & y8) return result ^ 0x80000000 ^ x4 ^ y4; if (x8 | y8) { if (result & 0x40000000) return result ^ 0xC0000000 ^ x4 ^ y4; else return result ^ 0x40000000 ^ x4 ^ y4; } return result ^ x4 ^ y4; } function F(x, y, z) { return (x & y) | (~x & z); } function G(x, y, z) { return (x & z) | (y & ~z); } function H(x, y, z) { return x ^ y ^ z; } function I(x, y, z) { return y ^ (x | ~z); } function FF(a, b, c, d, x, s, ac) { a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac)); return addUnsigned(rotateLeft(a, s), b); } function GG(a, b, c, d, x, s, ac) { a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac)); return addUnsigned(rotateLeft(a, s), b); } function HH(a, b, c, d, x, s, ac) { a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac)); return addUnsigned(rotateLeft(a, s), b); } function II(a, b, c, d, x, s, ac) { a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac)); return addUnsigned(rotateLeft(a, s), b); } function convertToWordArray(message) { const messageLength = message.length; const wordCount = (((messageLength + 8) >>> 6) + 1) << 4; const wordArray = new Array(wordCount - 1); let bytePosition = 0; let wordPosition = 0; while (bytePosition < messageLength) { wordPosition = (bytePosition >>> 2); wordArray[wordPosition] |= (message.charCodeAt(bytePosition) & 0xFF) << ((bytePosition % 4) * 8); bytePosition++; } wordPosition = (bytePosition >>> 2); wordArray[wordPosition] |= 0x80 << ((bytePosition % 4) * 8); wordArray[wordCount - 2] = messageLength << 3; wordArray[wordCount - 1] = messageLength >>> 29; return wordArray; } function wordToHex(value) { let hex = ''; for (let i = 0; i <= 3; i++) { const byte = (value >>> (i * 8)) & 0xFF; hex += ('0' + byte.toString(16)).slice(-2); } return hex; } // UTF-8编码 message = unescape(encodeURIComponent(message)); const x = convertToWordArray(message); let a = 0x67452301; let b = 0xEFCDAB89; let c = 0x98BADCFE; let d = 0x10325476; const S11 = 7, S12 = 12, S13 = 17, S14 = 22; const S21 = 5, S22 = 9, S23 = 14, S24 = 20; const S31 = 4, S32 = 11, S33 = 16, S34 = 23; const S41 = 6, S42 = 10, S43 = 15, S44 = 21; for (let k = 0; k < x.length; k += 16) { const AA = a, BB = b, CC = c, DD = d; a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478); d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756); c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB); b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE); a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF); d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A); c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613); b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501); a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8); d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF); c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1); b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE); a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122); d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193); c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E); b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821); a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562); d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340); c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51); b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA); a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D); d = GG(d, a, b, c, x[k + 10], S22, 0x2441453); c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681); b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8); a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6); d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6); c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87); b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED); a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905); d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8); c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9); b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A); a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942); d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681); c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122); b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C); a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44); d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9); c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60); b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70); a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6); d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA); c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085); b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05); a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039); d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5); c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8); b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665); a = II(a, b, c, d, x[k + 0], S41, 0xF4292244); d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97); c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7); b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039); a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3); d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92); c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D); b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1); a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F); d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0); c = II(c, d, a, b, x[k + 6], S43, 0xA3014314); b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1); a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82); d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235); c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB); b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391); a = addUnsigned(a, AA); b = addUnsigned(b, BB); c = addUnsigned(c, CC); d = addUnsigned(d, DD); } return (wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d)).toLowerCase(); } // 导出供其他模块使用 if (typeof module !== 'undefined' && module.exports) { module.exports = { md5 }; }