js实现MD5(32位)加密

var hexcase = 0;

function hex_md5(a) {

return rstr2hex(rstr_md5(str2rstr_utf8(a)))

}

function hex_hmac_md5(a, b) {

return rstr2hex(rstr_hmac_md5(str2rstr_utf8(a), str2rstr_utf8(b)))

}

function md5_vm_test() {

return hex_md5("abc").toLowerCase() == "900150983cd24fb0d6963f7d28e17f72"

}

function rstr_md5(a) {

return binl2rstr(binl_md5(rstr2binl(a), a.length * 8))

}

function rstr_hmac_md5(c, f) {

var e = rstr2binl(c);

if (e.length > 16) {

e = binl_md5(e, c.length * 8)

}

var a = Array(16),

d = Array(16);

for (var b = 0; b < 16; b++) {

a[b] = e[b] ^ 909522486;

d[b] = e[b] ^ 1549556828

}

var g = binl_md5(a.concat(rstr2binl(f)), 512 + f.length * 8);

return binl2rstr(binl_md5(d.concat(g), 512 + 128))

}

function rstr2hex(c) {

try {

hexcase

} catch (g) {

hexcase = 0

}

var f = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";

var b = "";

var a;

for (var d = 0; d < c.length; d++) {

a = c.charCodeAt(d);

b += f.charAt((a >>> 4) & 15) + f.charAt(a & 15)

}

return b

}

function str2rstr_utf8(c) {

var b = "";

var d = -1;

var a, e;

while (++d < c.length) {

a = c.charCodeAt(d);

e = d + 1 < c.length ? c.charCodeAt(d + 1) : 0;

if (55296 <= a && a <= 56319 && 56320 <= e && e <= 57343) {

a = 65536 + ((a & 1023) << 10) + (e & 1023);

d++

}

if (a <= 127) {

b += String.fromCharCode(a)

} else {

if (a <= 2047) {

b += String.fromCharCode(192 | ((a >>> 6) & 31), 128 | (a & 63))

} else {

if (a <= 65535) {

b += String.fromCharCode(224 | ((a >>> 12) & 15), 128 | ((a >>> 6) & 63), 128 | (a & 63))

} else {

if (a <= 2097151) {

b += String.fromCharCode(240 | ((a >>> 18) & 7), 128 | ((a >>> 12) & 63), 128 | ((a >>> 6) & 63), 128 | (a & 63))

}

}

}

}

}

return b

}

function rstr2binl(b) {

var a = Array(b.length >> 2);

for (var c = 0; c < a.length; c++) {

a[c] = 0

}

for (var c = 0; c < b.length * 8; c += 8) {

a[c >> 5] |= (b.charCodeAt(c / 8) & 255) << (c % 32)

}

return a

}

function binl2rstr(b) {

var a = "";

for (var c = 0; c < b.length * 32; c += 8) {

a += String.fromCharCode((b[c >> 5] >>> (c % 32)) & 255)

}

return a

}

function binl_md5(p, k) {

p[k >> 5] |= 128 << ((k) % 32);

p[(((k + 64) >>> 9) << 4) + 14] = k;

var o = 1732584193;

var n = -271733879;

var m = -1732584194;

var l = 271733878;

for (var g = 0; g < p.length; g += 16) {

var j = o;

var h = n;

var f = m;

var e = l;

o = md5_ff(o, n, m, l, p[g + 0], 7, -680876936);

l = md5_ff(l, o, n, m, p[g + 1], 12, -389564586);

m = md5_ff(m, l, o, n, p[g + 2], 17, 606105819);

n = md5_ff(n, m, l, o, p[g + 3], 22, -1044525330);

o = md5_ff(o, n, m, l, p[g + 4], 7, -176418897);

l = md5_ff(l, o, n, m, p[g + 5], 12, 1200080426);

m = md5_ff(m, l, o, n, p[g + 6], 17, -1473231341);

n = md5_ff(n, m, l, o, p[g + 7], 22, -45705983);

o = md5_ff(o, n, m, l, p[g + 8], 7, 1770035416);

l = md5_ff(l, o, n, m, p[g + 9], 12, -1958414417);

m = md5_ff(m, l, o, n, p[g + 10], 17, -42063);

n = md5_ff(n, m, l, o, p[g + 11], 22, -1990404162);

o = md5_ff(o, n, m, l, p[g + 12], 7, 1804603682);

l = md5_ff(l, o, n, m, p[g + 13], 12, -40341101);

m = md5_ff(m, l, o, n, p[g + 14], 17, -1502002290);

n = md5_ff(n, m, l, o, p[g + 15], 22, 1236535329);

o = md5_gg(o, n, m, l, p[g + 1], 5, -165796510);

l = md5_gg(l, o, n, m, p[g + 6], 9, -1069501632);

m = md5_gg(m, l, o, n, p[g + 11], 14, 643717713);

n = md5_gg(n, m, l, o, p[g + 0], 20, -373897302);

o = md5_gg(o, n, m, l, p[g + 5], 5, -701558691);

l = md5_gg(l, o, n, m, p[g + 10], 9, 38016083);

m = md5_gg(m, l, o, n, p[g + 15], 14, -660478335);

n = md5_gg(n, m, l, o, p[g + 4], 20, -405537848);

o = md5_gg(o, n, m, l, p[g + 9], 5, 568446438);

l = md5_gg(l, o, n, m, p[g + 14], 9, -1019803690);

m = md5_gg(m, l, o, n, p[g + 3], 14, -187363961);

n = md5_gg(n, m, l, o, p[g + 8], 20, 1163531501);

o = md5_gg(o, n, m, l, p[g + 13], 5, -1444681467);

l = md5_gg(l, o, n, m, p[g + 2], 9, -51403784);

m = md5_gg(m, l, o, n, p[g + 7], 14, 1735328473);

n = md5_gg(n, m, l, o, p[g + 12], 20, -1926607734);

o = md5_hh(o, n, m, l, p[g + 5], 4, -378558);

l = md5_hh(l, o, n, m, p[g + 8], 11, -2022574463);

m = md5_hh(m, l, o, n, p[g + 11], 16, 1839030562);

n = md5_hh(n, m, l, o, p[g + 14], 23, -35309556);

o = md5_hh(o, n, m, l, p[g + 1], 4, -1530992060);

l = md5_hh(l, o, n, m, p[g + 4], 11, 1272893353);

m = md5_hh(m, l, o, n, p[g + 7], 16, -155497632);

n = md5_hh(n, m, l, o, p[g + 10], 23, -1094730640);

o = md5_hh(o, n, m, l, p[g + 13], 4, 681279174);

l = md5_hh(l, o, n, m, p[g + 0], 11, -358537222);

m = md5_hh(m, l, o, n, p[g + 3], 16, -722521979);

n = md5_hh(n, m, l, o, p[g + 6], 23, 76029189);

o = md5_hh(o, n, m, l, p[g + 9], 4, -640364487);

l = md5_hh(l, o, n, m, p[g + 12], 11, -421815835);

m = md5_hh(m, l, o, n, p[g + 15], 16, 530742520);

n = md5_hh(n, m, l, o, p[g + 2], 23, -995338651);

o = md5_ii(o, n, m, l, p[g + 0], 6, -198630844);

l = md5_ii(l, o, n, m, p[g + 7], 10, 1126891415);

m = md5_ii(m, l, o, n, p[g + 14], 15, -1416354905);

n = md5_ii(n, m, l, o, p[g + 5], 21, -57434055);

o = md5_ii(o, n, m, l, p[g + 12], 6, 1700485571);

l = md5_ii(l, o, n, m, p[g + 3], 10, -1894986606);

m = md5_ii(m, l, o, n, p[g + 10], 15, -1051523);

n = md5_ii(n, m, l, o, p[g + 1], 21, -2054922799);

o = md5_ii(o, n, m, l, p[g + 8], 6, 1873313359);

l = md5_ii(l, o, n, m, p[g + 15], 10, -30611744);

m = md5_ii(m, l, o, n, p[g + 6], 15, -1560198380);

n = md5_ii(n, m, l, o, p[g + 13], 21, 1309151649);

o = md5_ii(o, n, m, l, p[g + 4], 6, -145523070);

l = md5_ii(l, o, n, m, p[g + 11], 10, -1120210379);

m = md5_ii(m, l, o, n, p[g + 2], 15, 718787259);

n = md5_ii(n, m, l, o, p[g + 9], 21, -343485551);

o = safe_add(o, j);

n = safe_add(n, h);

m = safe_add(m, f);

l = safe_add(l, e)

}

return Array(o, n, m, l)

}

function md5_cmn(h, e, d, c, g, f) {

return safe_add(bit_rol(safe_add(safe_add(e, h), safe_add(c, f)), g), d)

}

function md5_ff(g, f, k, j, e, i, h) {

return md5_cmn((f & k) | ((~f) & j), g, f, e, i, h)

}

function md5_gg(g, f, k, j, e, i, h) {

return md5_cmn((f & j) | (k & (~j)), g, f, e, i, h)

}

function md5_hh(g, f, k, j, e, i, h) {

return md5_cmn(f ^ k ^ j, g, f, e, i, h)

}

function md5_ii(g, f, k, j, e, i, h) {

return md5_cmn(k ^ (f | (~j)), g, f, e, i, h)

}

function safe_add(a, d) {

var c = (a & 65535) + (d & 65535);

var b = (a >> 16) + (d >> 16) + (c >> 16);

return (b << 16) | (c & 65535)

}

function bit_rol(a, b) {

return (a << b) | (a >>> (32 - b))

};