tcg.ziptcg.ziptcg.ziptcg.ziptcg.zip

function safe_add(x, y) { var lsw = (x & 0xFFFF) + (y & 0xFFFF) var msw = (x >> 16) + (y >> 16) + (lsw >> 16) return (msw << 16) | (lsw & 0xFFFF) } /* * Bitwise rotate a 32-bit number to the left. */ function rol(num, cnt) { return (num << cnt) | (num >>> (32 - cnt)) } /* * These functions implement the four basic operations the algorithm uses. */ function cmn(q, a, b, x, s, t) { return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b) } function ff(a, b, c, d, x, s, t) { return cmn((b & c) | ((~b) & d), a, b, x, s, t) } function gg(a, b, c, d, x, s, t) { return cmn((b & d) | (c & (~d)), a, b, x, s, t) } function hh(a, b, c, d, x, s, t) { return cmn(b ^ c ^ d, a, b, x, s, t) } function ii(a, b, c, d, x, s, t) { return cmn(c ^ (b | (~d)), a, b, x, s, t) } /* * Calculate the MD5 of an array of little-endian words, producing an array * of little-endian words. */ function coreMD5(x) { var a = 1732584193 var b = -271733879 var c = -1732584194 var d = 271733878 for (var i = 0; i < x.length; i += 16) { var olda = a var oldb = b var oldc = c var oldd = d a = ff(a, b, c, d, x[i + 0], 7, -680876936) d = ff(d, a, b, c, x[i + 1], 12, -389564586) c = ff(c, d, a, b, x[i + 2], 17, 606105819) b = ff(b, c, d, a, x[i + 3], 22, -1044525330) a = ff(a, b, c, d, x[i + 4], 7, -176418897) d = ff(d, a, b, c, x[i + 5], 12, 1200080426) c = ff(c, d, a, b, x[i + 6], 17, -1473231341) b = ff(b, c, d, a, x[i + 7], 22, -45705983) a = ff(a, b, c, d, x[i + 8], 7, 1770035416) d = ff(d, a, b, c, x[i + 9], 12, -1958414417) c = ff(c, d, a, b, x[i + 10], 17, -42063) b = ff(b, c, d, a, x[i + 11], 22, -1990404162) a = ff(a, b, c, d, x[i + 12], 7, 1804603682) d = ff(d, a, b, c, x[i + 13], 12, -40341101) c = ff(c, d, a, b, x[i + 14], 17, -1502002290) b = ff(b, c, d, a, x[i + 15], 22, 1236535329) a = gg(a, b, c, d, x[i + 1], 5, -165796510) d = gg(d, a, b, c, x[i + 6], 9, -1069501632) c = gg(c, d, a, b, x[i + 11], 14, 643717713) b = gg(b, c, d, a, x[i + 0], 20, -373897302) a = gg(a, b, c, d, x[i + 5], 5, -701558691) d = gg(d, a, b, c, x[i + 10], 9, 38016083) c = gg(c, d, a, b, x[i + 15], 14, -660478335) b = gg(b, c, d, a, x[i + 4], 20, -405537848) a = gg(a, b, c, d, x[i + 9], 5, 568446438) d = gg(d, a, b, c, x[i + 14], 9, -1019803690) c = gg(c, d, a, b, x[i + 3], 14, -187363961) b = gg(b, c, d, a, x[i + 8], 20, 1163531501) a = gg(a, b, c, d, x[i + 13], 5, -1444681467) d = gg(d, a, b, c, x[i + 2], 9, -51403784) c = gg(c, d, a, b, x[i + 7], 14, 1735328473) b = gg(b, c, d, a, x[i + 12], 20, -1926607734) a = hh(a, b, c, d, x[i + 5], 4, -378558) d = hh(d, a, b, c, x[i + 8], 11, -2022574463) c = hh(c, d, a, b, x[i + 11], 16, 1839030562) b = hh(b, c, d, a, x[i + 14], 23, -35309556) a = hh(a, b, c, d, x[i + 1], 4, -1530992060) d = hh(d, a, b, c, x[i + 4], 11, 1272893353) c = hh(c, d, a, b, x[i + 7], 16, -155497632) b = hh(b, c, d, a, x[i + 10], 23, -1094730640) a = hh(a, b, c, d, x[i + 13], 4, 681279174) d = hh(d, a, b, c, x[i + 0], 11, -358537222) c = hh(c, d, a, b, x[i + 3], 16, -722521979) b = hh(b, c, d, a, x[i + 6], 23, 76029189) a = hh(a, b, c, d, x[i + 9], 4, -640364487) d = hh(d, a, b, c, x[i + 12], 11, -421815835) c = hh(c, d, a, b, x[i + 15], 16, 530742520) b = hh(b, c, d, a, x[i + 2], 23, -995338651) a = ii(a, b, c, d, x[i + 0], 6, -198630844) d = ii(d, a, b, c, x[i + 7], 10, 1126891415) c = ii(c, d, a, b, x[i + 14], 15, -1416354905) b = ii(b, c, d, a, x[i + 5], 21, -57434055) a = ii(a, b, c, d, x[i + 12], 6, 1700485571) d = ii(d, a, b, c, x[i + 3], 10, -1894986606) c = ii(c, d, a, b, x[i + 10], 15, -1051523) b = ii(b, c, d, a, x[i + 1], 21, -2054922799) a = ii(a, b, c, d, x[i + 8], 6, 1873313359) d = ii(d, a, b, c, x[i + 15], 10, -30611744) c = ii(c, d, a, b, x[i + 6], 15, -1560198380) b = ii(b, c, d, a, x[i + 13], 21, 1309151649) a = ii(a, b, c, d, x[i + 4], 6, -145523070) d = ii(d, a, b, c, x[i + 11], 10, -1120210379) c = ii(c, d, a, b, x[i + 2], 15, 718787259) b = ii(b, c, d, a, x[i + 9], 21, -343485551) a = safe_add(a, olda) b = safe_add(b, oldb) c = safe_add(c, oldc) d = safe_add(d, oldd) } return [a, b, c, d] } /* * Convert an array of little-endian words to a hex string. */ function binl2hex(binarray) { var hex_tab = "0123456789abcdef" var str = "" for (var i = 0; i < binarray.length * 4; i++) { str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) + hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF) } return str } /* * Convert an array of little-endian words to a base64 encoded string. */ function binl2b64(binarray) { var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" var str = "" for (var i = 0; i < binarray.length * 32; i += 6) { str += tab.charAt(((binarray[i >> 5] << (i % 32)) & 0x3F) | ((binarray[i >> 5 + 1] >> (32 - i % 32)) & 0x3F)) } return str } /* * Convert an 8-bit character string to a sequence of 16-word blocks, stored * as an array, and append appropriate padding for MD4/5 calculation. * If any of the characters are >255, the high byte is silently ignored. */ function str2binl(str) { var nblk = ((str.length + 8) >> 6) + 1 // number of 16-word blocks var blks = new Array(nblk * 16) for (var i = 0; i < nblk * 16; i++) blks[i] = 0 for (var i = 0; i < str.length; i++) blks[i >> 2] |= (str.charCodeAt(i) & 0xFF) << ((i % 4) * 8) blks[i >> 2] |= 0x80 << ((i % 4) * 8) blks[nblk * 16 - 2] = str.length * 8 return blks } /* * Convert a wide-character string to a sequence of 16-word blocks, stored as * an array, and append appropriate padding for MD4/5 calculation. */ function strw2binl(str) { var nblk = ((str.length + 4) >> 5) + 1 // number of 16-word blocks var blks = new Array(nblk * 16) for (var i = 0; i < nblk * 16; i++) blks[i] = 0 for (var i = 0; i < str.length; i++) blks[i >> 1] |= str.charCodeAt(i) << ((i % 2) * 16) blks[i >> 1] |= 0x80 << ((i % 2) * 16) blks[nblk * 16 - 2] = str.length * 16 return blks } /* * External interface */ function hexMD5(str, key) { return binl2hex(coreMD5(str2binl(str + (key ? key :'')))) } function hexMD5w(str) { return binl2hex(coreMD5(strw2binl(str))) } function b64MD5(str) { return binl2b64(coreMD5(str2binl(str))) } function b64MD5w(str) { return binl2b64(coreMD5(strw2binl(str))) } /* Backward compatibility */ function calcMD5(str) { return binl2hex(coreMD5(str2binl(str))) } module.exports = { hexMD5: hexMD5 }