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发表于 2018-6-23 18:09:40
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河南省郑州市
- var Sha1 = {}; // Sha1 namespace
- /**
- * Generates SHA-1 hash of string
- *
- * [url=home.php?mod=space&uid=275307]@param[/url] {String} msg String to be hashed
- * @param {Boolean} [utf8encode=true] Encode msg as UTF-8 before generating hash
- * @returns {String} Hash of msg as hex character string
- */
- Sha1.hash = function(msg, utf8encode) {
- utf8encode = (typeof utf8encode == 'undefined') ? true : utf8encode;
-
- // convert string to UTF-8, as SHA only deals with byte-streams
- if (utf8encode) msg = Utf8.encode(msg);
-
- // constants [鎼?.2.1]
- var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
-
- // PREPROCESSING
-
- msg += String.fromCharCode(0x80); // add trailing '1' bit (+ 0's padding) to string [鎼?.1.1]
-
- // convert string msg into 512-bit/16-integer blocks arrays of ints [鎼?.2.1]
- var l = msg.length/4 + 2; // length (in 32-bit integers) of msg + 閳?閳?+ appended length
- var N = Math.ceil(l/16); // number of 16-integer-blocks required to hold 'l' ints
- var M = new Array(N);
-
- for (var i=0; i<N; i++) {
- M[i] = new Array(16);
- for (var j=0; j<16; j++) { // encode 4 chars per integer, big-endian encoding
- M[i][j] = (msg.charCodeAt(i*64+j*4)<<24) | (msg.charCodeAt(i*64+j*4+1)<<16) |
- (msg.charCodeAt(i*64+j*4+2)<<8) | (msg.charCodeAt(i*64+j*4+3));
- } // note running off the end of msg is ok 'cos bitwise ops on NaN return 0
- }
- // add length (in bits) into final pair of 32-bit integers (big-endian) [鎼?.1.1]
- // note: most significant word would be (len-1)*8 >>> 32, but since JS converts
- // bitwise-op args to 32 bits, we need to simulate this by arithmetic operators
- M[N-1][14] = ((msg.length-1)*8) / Math.pow(2, 32); M[N-1][14] = Math.floor(M[N-1][14])
- M[N-1][15] = ((msg.length-1)*8) & 0xffffffff;
-
- // set initial hash value [鎼?.3.1]
- var H0 = 0x67452301;
- var H1 = 0xefcdab89;
- var H2 = 0x98badcfe;
- var H3 = 0x10325476;
- var H4 = 0xc3d2e1f0;
-
- // HASH COMPUTATION [鎼?.1.2]
-
- var W = new Array(80); var a, b, c, d, e;
- for (var i=0; i<N; i++) {
-
- // 1 - prepare message schedule 'W'
- for (var t=0; t<16; t++) W[t] = M[i][t];
- for (var t=16; t<80; t++) W[t] = Sha1.ROTL(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16], 1);
-
- // 2 - initialise five working variables a, b, c, d, e with previous hash value
- a = H0; b = H1; c = H2; d = H3; e = H4;
-
- // 3 - main loop
- for (var t=0; t<80; t++) {
- var s = Math.floor(t/20); // seq for blocks of 'f' functions and 'K' constants
- var T = (Sha1.ROTL(a,5) + Sha1.f(s,b,c,d) + e + K[s] + W[t]) & 0xffffffff;
- e = d;
- d = c;
- c = Sha1.ROTL(b, 30);
- b = a;
- a = T;
- }
-
- // 4 - compute the new intermediate hash value
- H0 = (H0+a) & 0xffffffff; // note 'addition modulo 2^32'
- H1 = (H1+b) & 0xffffffff;
- H2 = (H2+c) & 0xffffffff;
- H3 = (H3+d) & 0xffffffff;
- H4 = (H4+e) & 0xffffffff;
- }
- return Sha1.toHexStr(H0) + Sha1.toHexStr(H1) +
- Sha1.toHexStr(H2) + Sha1.toHexStr(H3) + Sha1.toHexStr(H4);
- }
- //
- // function 'f' [鎼?.1.1]
- //
- Sha1.f = function(s, x, y, z) {
- switch (s) {
- case 0: return (x & y) ^ (~x & z); // Ch()
- case 1: return x ^ y ^ z; // Parity()
- case 2: return (x & y) ^ (x & z) ^ (y & z); // Maj()
- case 3: return x ^ y ^ z; // Parity()
- }
- }
- //
- // rotate left (circular left shift) value x by n positions [鎼?.2.5]
- //
- Sha1.ROTL = function(x, n) {
- return (x<<n) | (x>>>(32-n));
- }
- //
- // hexadecimal representation of a number
- // (note toString(16) is implementation-dependant, and
- // in IE returns signed numbers when used on full words)
- //
- Sha1.toHexStr = function(n) {
- var s="", v;
- for (var i=7; i>=0; i--) { v = (n>>>(i*4)) & 0xf; s += v.toString(16); }
- return s;
- }
- /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
- /* Utf8 class: encode / decode between multi-byte Unicode characters and UTF-8 multiple */
- /* single-byte character encoding (c) Chris Veness 2002-2010 */
- /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
- var Utf8 = {}; // Utf8 namespace
- /**
- * Encode multi-byte Unicode string into utf-8 multiple single-byte characters
- * (BMP / basic multilingual plane only)
- *
- * Chars in range U+0080 - U+07FF are encoded in 2 chars, U+0800 - U+FFFF in 3 chars
- *
- * @param {String} strUni Unicode string to be encoded as UTF-8
- * @returns {String} encoded string
- */
- Utf8.encode = function(strUni) {
- // use regular expressions & String.replace callback function for better efficiency
- // than procedural approaches
- var strUtf = strUni.replace(
- /[\u0080-\u07ff]/g, // U+0080 - U+07FF => 2 bytes 110yyyyy, 10zzzzzz
- function(c) {
- var cc = c.charCodeAt(0);
- return String.fromCharCode(0xc0 | cc>>6, 0x80 | cc&0x3f); }
- );
- strUtf = strUtf.replace(
- /[\u0800-\uffff]/g, // U+0800 - U+FFFF => 3 bytes 1110xxxx, 10yyyyyy, 10zzzzzz
- function(c) {
- var cc = c.charCodeAt(0);
- return String.fromCharCode(0xe0 | cc>>12, 0x80 | cc>>6&0x3F, 0x80 | cc&0x3f); }
- );
- return strUtf;
- }
- /**
- * Decode utf-8 encoded string back into multi-byte Unicode characters
- *
- * @param {String} strUtf UTF-8 string to be decoded back to Unicode
- * @returns {String} decoded string
- */
- Utf8.decode = function(strUtf) {
- // note: decode 3-byte chars first as decoded 2-byte strings could appear to be 3-byte char!
- var strUni = strUtf.replace(
- /[\u00e0-\u00ef][\u0080-\u00bf][\u0080-\u00bf]/g, // 3-byte chars
- function(c) { // (note parentheses for precence)
- var cc = ((c.charCodeAt(0)&0x0f)<<12) | ((c.charCodeAt(1)&0x3f)<<6) | ( c.charCodeAt(2)&0x3f);
- return String.fromCharCode(cc); }
- );
- strUni = strUni.replace(
- /[\u00c0-\u00df][\u0080-\u00bf]/g, // 2-byte chars
- function(c) { // (note parentheses for precence)
- var cc = (c.charCodeAt(0)&0x1f)<<6 | c.charCodeAt(1)&0x3f;
- return String.fromCharCode(cc); }
- );
- return strUni;
- }
- function a(nonce,ts,pwd){
- pwd = Sha1.hash(pwd)
- return Sha1.hash(nonce+ts+pwd);
- }
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