js实现md5加密(支持中文)

function md5(a) { function b(a, b) { return a << b | a >>> 32 - b } function
c(a, b) { var c, d, e, f, g; return e = 2147483648 & a, f = 2147483648 & b, c =
1073741824 & a, d = 1073741824 & b, g = (1073741823 & a) + (1073741823 & b), c
& d ? 2147483648 ^ g ^ e ^ f : c | d ? 1073741824 & g ? 3221225472 ^ g ^ e ^ f
: 1073741824 ^ g ^ e ^ f : g ^ e ^ f } function d(a, b, c) { return a & b | ~a
& c } function e(a, b, c) { return a & c | b & ~c } function f(a, b, c) {
return a ^ b ^ c } function g(a, b, c) { return b ^ (a | ~c) } function h(a, e,
f, g, h, i, j) { return a = c(a, c(c(d(e, f, g), h), j)), c(b(a, i), e) }
function i(a, d, f, g, h, i, j) { return a = c(a, c(c(e(d, f, g), h), j)),
c(b(a, i), d) } function j(a, d, e, g, h, i, j) { return a = c(a, c(c(f(d, e,
g), h), j)), c(b(a, i), d) } function k(a, d, e, f, h, i, j) { return a = c(a,
c(c(g(d, e, f), h), j)), c(b(a, i), d) } function l(a) { for (var b, c =
a.length, d = c + 8, e = (d - d % 64) / 64, f = 16 * (e + 1), g = new Array(f -
1), h = 0, i = 0; c > i;) b = (i - i % 4) / 4, h = i % 4 * 8, g[b] = g[b] |
a.charCodeAt(i) << h, i++; return b = (i - i % 4) / 4, h = i % 4 * 8, g[b] =
g[b] | 128 << h, g[f - 2] = c << 3, g[f - 1] = c >>> 29, g } function m(a) {
var b, c, d = "", e = ""; for (c = 0; 3 >= c; c++) b = a >>> 8 * c & 255, e =
"0" + b.toString(16), d += e.substr(e.length - 2, 2); return d } function n(a)
{ a = a.replace(/\r\n/g, "\n"); for (var b = "", c = 0; c < a.length; c++) {
var d = a.charCodeAt(c); 128 > d ? b += String.fromCharCode(d) : d > 127 &&
2048 > d ? (b += String.fromCharCode(d >> 6 | 192), b += String.fromCharCode(63
& d | 128)) : (b += String.fromCharCode(d >> 12 | 224), b +=
String.fromCharCode(d >> 6 & 63 | 128), b += String.fromCharCode(63 & d | 128))
} return b } var o, p, q, r, s, t, u, v, w, x = [], y = 7, z = 12, A = 17, B =
22, C = 5, D = 9, E = 14, F = 20, G = 4, H = 11, I = 16, J = 23, K = 6, L = 10,
M = 15, N = 21; for (a = n(a), x = l(a), t = 1732584193, u = 4023233417, v =
2562383102, w = 271733878, o = 0; o < x.length; o += 16) p = t, q = u, r = v, s
= w, t = h(t, u, v, w, x[o + 0], y, 3614090360), w = h(w, t, u, v, x[o + 1], z,
3905402710), v = h(v, w, t, u, x[o + 2], A, 606105819), u = h(u, v, w, t, x[o +
3], B, 3250441966), t = h(t, u, v, w, x[o + 4], y, 4118548399), w = h(w, t, u,
v, x[o + 5], z, 1200080426), v = h(v, w, t, u, x[o + 6], A, 2821735955), u =
h(u, v, w, t, x[o + 7], B, 4249261313), t = h(t, u, v, w, x[o + 8], y,
1770035416), w = h(w, t, u, v, x[o + 9], z, 2336552879), v = h(v, w, t, u, x[o
+ 10], A, 4294925233), u = h(u, v, w, t, x[o + 11], B, 2304563134), t = h(t, u,
v, w, x[o + 12], y, 1804603682), w = h(w, t, u, v, x[o + 13], z, 4254626195), v
= h(v, w, t, u, x[o + 14], A, 2792965006), u = h(u, v, w, t, x[o + 15], B,
1236535329), t = i(t, u, v, w, x[o + 1], C, 4129170786), w = i(w, t, u, v, x[o
+ 6], D, 3225465664), v = i(v, w, t, u, x[o + 11], E, 643717713), u = i(u, v,
w, t, x[o + 0], F, 3921069994), t = i(t, u, v, w, x[o + 5], C, 3593408605), w =
i(w, t, u, v, x[o + 10], D, 38016083), v = i(v, w, t, u, x[o + 15], E,
3634488961), u = i(u, v, w, t, x[o + 4], F, 3889429448), t = i(t, u, v, w, x[o
+ 9], C, 568446438), w = i(w, t, u, v, x[o + 14], D, 3275163606), v = i(v, w,
t, u, x[o + 3], E, 4107603335), u = i(u, v, w, t, x[o + 8], F, 1163531501), t =
i(t, u, v, w, x[o + 13], C, 2850285829), w = i(w, t, u, v, x[o + 2], D,
4243563512), v = i(v, w, t, u, x[o + 7], E, 1735328473), u = i(u, v, w, t, x[o
+ 12], F, 2368359562), t = j(t, u, v, w, x[o + 5], G, 4294588738), w = j(w, t,
u, v, x[o + 8], H, 2272392833), v = j(v, w, t, u, x[o + 11], I, 1839030562), u
= j(u, v, w, t, x[o + 14], J, 4259657740), t = j(t, u, v, w, x[o + 1], G,
2763975236), w = j(w, t, u, v, x[o + 4], H, 1272893353), v = j(v, w, t, u, x[o
+ 7], I, 4139469664), u = j(u, v, w, t, x[o + 10], J, 3200236656), t = j(t, u,
v, w, x[o + 13], G, 681279174), w = j(w, t, u, v, x[o + 0], H, 3936430074), v =
j(v, w, t, u, x[o + 3], I, 3572445317), u = j(u, v, w, t, x[o + 6], J,
76029189), t = j(t, u, v, w, x[o + 9], G, 3654602809), w = j(w, t, u, v, x[o +
12], H, 3873151461), v = j(v, w, t, u, x[o + 15], I, 530742520), u = j(u, v, w,
t, x[o + 2], J, 3299628645), t = k(t, u, v, w, x[o + 0], K, 4096336452), w =
k(w, t, u, v, x[o + 7], L, 1126891415), v = k(v, w, t, u, x[o + 14], M,
2878612391), u = k(u, v, w, t, x[o + 5], N, 4237533241), t = k(t, u, v, w, x[o
+ 12], K, 1700485571), w = k(w, t, u, v, x[o + 3], L, 2399980690), v = k(v, w,
t, u, x[o + 10], M, 4293915773), u = k(u, v, w, t, x[o + 1], N, 2240044497), t
= k(t, u, v, w, x[o + 8], K, 1873313359), w = k(w, t, u, v, x[o + 15], L,
4264355552), v = k(v, w, t, u, x[o + 6], M, 2734768916), u = k(u, v, w, t, x[o
+ 13], N, 1309151649), t = k(t, u, v, w, x[o + 4], K, 4149444226), w = k(w, t,
u, v, x[o + 11], L, 3174756917), v = k(v, w, t, u, x[o + 2], M, 718787259), u =
k(u, v, w, t, x[o + 9], N, 3951481745), t = c(t, p), u = c(u, q), v = c(v, r),
w = c(w, s); var O = m(t) + m(u) + m(v) + m(w); return O.toLowerCase() }

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