mirror of
https://github.com/Leo501/CocosCreatorTutorial.git
synced 2026-05-13 09:38:56 +08:00
232 lines
8.7 KiB
JavaScript
232 lines
8.7 KiB
JavaScript
/**
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* 只接受Uint8Array数据的格式
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* from jsb_runtime_md5.js
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* @param {} data
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*/
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module.exports = function (data) {
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// for test/debug
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function fflog(msg) {
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try {
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console.log(msg);
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} catch (e) {}
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}
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// convert number to (unsigned) 32 bit hex, zero filled string
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function to_zerofilled_hex(n) {
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var t1 = (n >>> 24).toString(16);
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var t2 = (n & 0x00FFFFFF).toString(16);
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return "00".substr(0, 2 - t1.length) + t1 +
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"000000".substr(0, 6 - t2.length) + t2;
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}
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// convert a 64 bit unsigned number to array of bytes. Little endian
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function int64_to_bytes(num) {
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var retval = [];
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for (var i = 0; i < 8; i++) {
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retval.push(num & 0xFF);
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num = num >>> 8;
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}
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return retval;
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}
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// 32 bit left-rotation
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function rol(num, places) {
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return ((num << places) & 0xFFFFFFFF) | (num >>> (32 - places));
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}
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// The 4 MD5 functions
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function fF(b, c, d) {
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return (b & c) | (~b & d);
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}
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function fG(b, c, d) {
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return (d & b) | (~d & c);
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}
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function fH(b, c, d) {
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return b ^ c ^ d;
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}
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function fI(b, c, d) {
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return c ^ (b | ~d);
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}
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// pick 4 bytes at specified offset. Little-endian is assumed
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function bytes_to_int32(arr, off) {
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return (arr[off + 3] << 24) | (arr[off + 2] << 16) | (arr[off + 1] << 8) | (arr[off]);
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}
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// convert the 4 32-bit buffers to a 128 bit hex string. (Little-endian is assumed)
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function int128le_to_hex(a, b, c, d) {
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var ra = "";
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var t = 0;
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var ta = 0;
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for (var i = 3; i >= 0; i--) {
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ta = arguments[i];
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t = (ta & 0xFF);
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ta = ta >>> 8;
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t = t << 8;
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t = t | (ta & 0xFF);
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ta = ta >>> 8;
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t = t << 8;
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t = t | (ta & 0xFF);
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ta = ta >>> 8;
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t = t << 8;
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t = t | ta;
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ra = ra + to_zerofilled_hex(t);
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}
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return ra;
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}
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// check input data type and perform conversions if needed
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if (!data instanceof Uint8Array) {
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fflog("input data type mismatch only support Uint8Array");
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return null;
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}
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var databytes = [];
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for (var i = 0; i < data.byteLength; i++) {
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databytes.push(data[i]);
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}
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// save original length
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var org_len = databytes.length;
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// first append the "1" + 7x "0"
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databytes.push(0x80);
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// determine required amount of padding
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var tail = databytes.length % 64;
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// no room for msg length?
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if (tail > 56) {
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// pad to next 512 bit block
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for (var i = 0; i < (64 - tail); i++) {
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databytes.push(0x0);
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}
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tail = databytes.length % 64;
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}
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for (i = 0; i < (56 - tail); i++) {
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databytes.push(0x0);
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}
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// message length in bits mod 512 should now be 448
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// append 64 bit, little-endian original msg length (in *bits*!)
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databytes = databytes.concat(int64_to_bytes(org_len * 8));
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// initialize 4x32 bit state
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var h0 = 0x67452301;
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var h1 = 0xEFCDAB89;
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var h2 = 0x98BADCFE;
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var h3 = 0x10325476;
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// temp buffers
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var a = 0,
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b = 0,
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c = 0,
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d = 0;
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function _add(n1, n2) {
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return 0x0FFFFFFFF & (n1 + n2)
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}
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// function update partial state for each run
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var updateRun = function (nf, sin32, dw32, b32) {
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var temp = d;
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d = c;
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c = b;
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//b = b + rol(a + (nf + (sin32 + dw32)), b32);
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b = _add(b,
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rol(
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_add(a,
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_add(nf, _add(sin32, dw32))
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), b32
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)
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);
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a = temp;
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};
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// Digest message
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for (i = 0; i < databytes.length / 64; i++) {
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// initialize run
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a = h0;
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b = h1;
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c = h2;
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d = h3;
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var ptr = i * 64;
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// do 64 runs
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updateRun(fF(b, c, d), 0xd76aa478, bytes_to_int32(databytes, ptr), 7);
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updateRun(fF(b, c, d), 0xe8c7b756, bytes_to_int32(databytes, ptr + 4), 12);
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updateRun(fF(b, c, d), 0x242070db, bytes_to_int32(databytes, ptr + 8), 17);
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updateRun(fF(b, c, d), 0xc1bdceee, bytes_to_int32(databytes, ptr + 12), 22);
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updateRun(fF(b, c, d), 0xf57c0faf, bytes_to_int32(databytes, ptr + 16), 7);
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updateRun(fF(b, c, d), 0x4787c62a, bytes_to_int32(databytes, ptr + 20), 12);
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updateRun(fF(b, c, d), 0xa8304613, bytes_to_int32(databytes, ptr + 24), 17);
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updateRun(fF(b, c, d), 0xfd469501, bytes_to_int32(databytes, ptr + 28), 22);
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updateRun(fF(b, c, d), 0x698098d8, bytes_to_int32(databytes, ptr + 32), 7);
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updateRun(fF(b, c, d), 0x8b44f7af, bytes_to_int32(databytes, ptr + 36), 12);
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updateRun(fF(b, c, d), 0xffff5bb1, bytes_to_int32(databytes, ptr + 40), 17);
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updateRun(fF(b, c, d), 0x895cd7be, bytes_to_int32(databytes, ptr + 44), 22);
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updateRun(fF(b, c, d), 0x6b901122, bytes_to_int32(databytes, ptr + 48), 7);
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updateRun(fF(b, c, d), 0xfd987193, bytes_to_int32(databytes, ptr + 52), 12);
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updateRun(fF(b, c, d), 0xa679438e, bytes_to_int32(databytes, ptr + 56), 17);
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updateRun(fF(b, c, d), 0x49b40821, bytes_to_int32(databytes, ptr + 60), 22);
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updateRun(fG(b, c, d), 0xf61e2562, bytes_to_int32(databytes, ptr + 4), 5);
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updateRun(fG(b, c, d), 0xc040b340, bytes_to_int32(databytes, ptr + 24), 9);
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updateRun(fG(b, c, d), 0x265e5a51, bytes_to_int32(databytes, ptr + 44), 14);
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updateRun(fG(b, c, d), 0xe9b6c7aa, bytes_to_int32(databytes, ptr), 20);
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updateRun(fG(b, c, d), 0xd62f105d, bytes_to_int32(databytes, ptr + 20), 5);
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updateRun(fG(b, c, d), 0x2441453, bytes_to_int32(databytes, ptr + 40), 9);
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updateRun(fG(b, c, d), 0xd8a1e681, bytes_to_int32(databytes, ptr + 60), 14);
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updateRun(fG(b, c, d), 0xe7d3fbc8, bytes_to_int32(databytes, ptr + 16), 20);
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updateRun(fG(b, c, d), 0x21e1cde6, bytes_to_int32(databytes, ptr + 36), 5);
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updateRun(fG(b, c, d), 0xc33707d6, bytes_to_int32(databytes, ptr + 56), 9);
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updateRun(fG(b, c, d), 0xf4d50d87, bytes_to_int32(databytes, ptr + 12), 14);
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updateRun(fG(b, c, d), 0x455a14ed, bytes_to_int32(databytes, ptr + 32), 20);
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updateRun(fG(b, c, d), 0xa9e3e905, bytes_to_int32(databytes, ptr + 52), 5);
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updateRun(fG(b, c, d), 0xfcefa3f8, bytes_to_int32(databytes, ptr + 8), 9);
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updateRun(fG(b, c, d), 0x676f02d9, bytes_to_int32(databytes, ptr + 28), 14);
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updateRun(fG(b, c, d), 0x8d2a4c8a, bytes_to_int32(databytes, ptr + 48), 20);
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updateRun(fH(b, c, d), 0xfffa3942, bytes_to_int32(databytes, ptr + 20), 4);
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updateRun(fH(b, c, d), 0x8771f681, bytes_to_int32(databytes, ptr + 32), 11);
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updateRun(fH(b, c, d), 0x6d9d6122, bytes_to_int32(databytes, ptr + 44), 16);
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updateRun(fH(b, c, d), 0xfde5380c, bytes_to_int32(databytes, ptr + 56), 23);
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updateRun(fH(b, c, d), 0xa4beea44, bytes_to_int32(databytes, ptr + 4), 4);
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updateRun(fH(b, c, d), 0x4bdecfa9, bytes_to_int32(databytes, ptr + 16), 11);
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updateRun(fH(b, c, d), 0xf6bb4b60, bytes_to_int32(databytes, ptr + 28), 16);
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updateRun(fH(b, c, d), 0xbebfbc70, bytes_to_int32(databytes, ptr + 40), 23);
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updateRun(fH(b, c, d), 0x289b7ec6, bytes_to_int32(databytes, ptr + 52), 4);
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updateRun(fH(b, c, d), 0xeaa127fa, bytes_to_int32(databytes, ptr), 11);
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updateRun(fH(b, c, d), 0xd4ef3085, bytes_to_int32(databytes, ptr + 12), 16);
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updateRun(fH(b, c, d), 0x4881d05, bytes_to_int32(databytes, ptr + 24), 23);
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updateRun(fH(b, c, d), 0xd9d4d039, bytes_to_int32(databytes, ptr + 36), 4);
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updateRun(fH(b, c, d), 0xe6db99e5, bytes_to_int32(databytes, ptr + 48), 11);
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updateRun(fH(b, c, d), 0x1fa27cf8, bytes_to_int32(databytes, ptr + 60), 16);
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updateRun(fH(b, c, d), 0xc4ac5665, bytes_to_int32(databytes, ptr + 8), 23);
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updateRun(fI(b, c, d), 0xf4292244, bytes_to_int32(databytes, ptr), 6);
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updateRun(fI(b, c, d), 0x432aff97, bytes_to_int32(databytes, ptr + 28), 10);
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updateRun(fI(b, c, d), 0xab9423a7, bytes_to_int32(databytes, ptr + 56), 15);
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updateRun(fI(b, c, d), 0xfc93a039, bytes_to_int32(databytes, ptr + 20), 21);
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updateRun(fI(b, c, d), 0x655b59c3, bytes_to_int32(databytes, ptr + 48), 6);
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updateRun(fI(b, c, d), 0x8f0ccc92, bytes_to_int32(databytes, ptr + 12), 10);
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updateRun(fI(b, c, d), 0xffeff47d, bytes_to_int32(databytes, ptr + 40), 15);
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updateRun(fI(b, c, d), 0x85845dd1, bytes_to_int32(databytes, ptr + 4), 21);
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updateRun(fI(b, c, d), 0x6fa87e4f, bytes_to_int32(databytes, ptr + 32), 6);
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updateRun(fI(b, c, d), 0xfe2ce6e0, bytes_to_int32(databytes, ptr + 60), 10);
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updateRun(fI(b, c, d), 0xa3014314, bytes_to_int32(databytes, ptr + 24), 15);
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updateRun(fI(b, c, d), 0x4e0811a1, bytes_to_int32(databytes, ptr + 52), 21);
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updateRun(fI(b, c, d), 0xf7537e82, bytes_to_int32(databytes, ptr + 16), 6);
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updateRun(fI(b, c, d), 0xbd3af235, bytes_to_int32(databytes, ptr + 44), 10);
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updateRun(fI(b, c, d), 0x2ad7d2bb, bytes_to_int32(databytes, ptr + 8), 15);
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updateRun(fI(b, c, d), 0xeb86d391, bytes_to_int32(databytes, ptr + 36), 21);
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// update buffers
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h0 = _add(h0, a);
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h1 = _add(h1, b);
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h2 = _add(h2, c);
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h3 = _add(h3, d);
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}
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// Done! Convert buffers to 128 bit (LE)
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return int128le_to_hex(h3, h2, h1, h0).toLowerCase();
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}; |