function md5(string) { var x = Array(); var k, AA, BB, CC, DD, a, b, c, d; var S11 = 7, S12 = 12, S13 = 17, S14 = 22; var S21 = 5, S22 = 9, S23 = 14, S24 = 20; var S31 = 4, S32 = 11, S33 = 16, S34 = 23; var S41 = 6, S42 = 10, S43 = 15, S44 = 21; string = Utf8Encode(string); x = ConvertToWordArray(string); a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476; for (k = 0; k < x.length; k += 16) { AA = a; BB = b; CC = c; DD = d; a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478); d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756); c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB); b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE); a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF); d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A); c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613); b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501); a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8); d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF); c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1); b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE); a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122); d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193); c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E); b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821); a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562); d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340); c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51); b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA); a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D); d = GG(d, a, b, c, x[k + 10], S22, 0x2441453); c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681); b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8); a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6); d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6); c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87); b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED); a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905); d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8); c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9); b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A); a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942); d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681); c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122); b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C); a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44); d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9); c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60); b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70); a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6); d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA); c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085); b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05); a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039); d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5); c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8); b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665); a = II(a, b, c, d, x[k + 0], S41, 0xF4292244); d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97); c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7); b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039); a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3); d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92); c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D); b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1); a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F); d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0); c = II(c, d, a, b, x[k + 6], S43, 0xA3014314); b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1); a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82); d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235); c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB); b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391); a = AddUnsigned(a, AA); b = AddUnsigned(b, BB); c = AddUnsigned(c, CC); d = AddUnsigned(d, DD); } var temp = WordToHex(a) + WordToHex(b) + WordToHex(c) + WordToHex(d); // return temp.toUpperCase(); return temp.toLowerCase(); } function RotateLeft(lValue, iShiftBits) { return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits)); } function AddUnsigned(lX, lY) { var lX4, lY4, lX8, lY8, lResult; lX8 = (lX & 0x80000000); lY8 = (lY & 0x80000000); lX4 = (lX & 0x40000000); lY4 = (lY & 0x40000000); lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF); if (lX4 & lY4) { return (lResult ^ 0x80000000 ^ lX8 ^ lY8); } if (lX4 | lY4) { if (lResult & 0x40000000) { return (lResult ^ 0xC0000000 ^ lX8 ^ lY8); } else { return (lResult ^ 0x40000000 ^ lX8 ^ lY8); } } else { return (lResult ^ lX8 ^ lY8); } } function F(x, y, z) { return (x & y) | ((~x) & z); } function G(x, y, z) { return (x & z) | (y & (~z)); } function H(x, y, z) { return (x ^ y ^ z); } function I(x, y, z) { return (y ^ (x | (~z))); } function FF(a, b, c, d, x, s, ac) { a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac)); return AddUnsigned(RotateLeft(a, s), b); } function GG(a, b, c, d, x, s, ac) { a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac)); return AddUnsigned(RotateLeft(a, s), b); } function HH(a, b, c, d, x, s, ac) { a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac)); return AddUnsigned(RotateLeft(a, s), b); } function II(a, b, c, d, x, s, ac) { a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac)); return AddUnsigned(RotateLeft(a, s), b); } function ConvertToWordArray(string) { var lWordCount; var lMessageLength = string.length; var lNumberOfWords_temp1 = lMessageLength + 8; var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64; var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16; var lWordArray = Array(lNumberOfWords - 1); var lBytePosition = 0; var lByteCount = 0; while (lByteCount < lMessageLength) { lWordCount = (lByteCount - (lByteCount % 4)) / 4; lBytePosition = (lByteCount % 4) * 8; lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition)); lByteCount++; } lWordCount = (lByteCount - (lByteCount % 4)) / 4; lBytePosition = (lByteCount % 4) * 8; lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition); lWordArray[lNumberOfWords - 2] = lMessageLength << 3; lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29; return lWordArray; } function WordToHex(lValue) { var WordToHexValue = "", WordToHexValue_temp = "", lByte, lCount; for (lCount = 0; lCount <= 3; lCount++) { lByte = (lValue >>> (lCount * 8)) & 255; WordToHexValue_temp = "0" + lByte.toString(16); WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2); } return WordToHexValue; } function Utf8Encode(string) { var utftext = ""; for (var n = 0; n < string.length; n++) { var c = string.charCodeAt(n); if (c < 128) { utftext += String.fromCharCode(c); } else if ((c > 127) && (c < 2048)) { utftext += String.fromCharCode((c >> 6) | 192); utftext += String.fromCharCode((c & 63) | 128); } else { utftext += String.fromCharCode((c >> 12) | 224); utftext += String.fromCharCode(((c >> 6) & 63) | 128); utftext += String.fromCharCode((c & 63) | 128); } } return utftext; }
返回的值字母是小写的，如果需要大写，在MD5()这个函数的返回值里选择return temp.toUpperCase()这个就行了。
function md5
(
string
)
{
var x
= Array
();
var k
, AA
, BB
, CC
, DD
, a
, b
, c
, d
;
var S11
=
7
, S12
=
12
, S13
=
17
, S14
=
22
;
var S21
=
5
, S22
=
9
, S23
=
14
, S24
=
20
;
var S31
=
4
, S32
=
11
, S33
=
16
, S34
=
23
;
var S41
=
6
, S42
=
10
, S43
=
15
, S44
=
21
;
string
= Utf8Encode
(
string
);
x
= ConvertToWordArray
(
string
);
a
=
0x67452301
;
b
=
0xEFCDAB89
;
c
=
0x98BADCFE
;
d
=
0x10325476
;
for
(k
=
0
; k
< x
.length
; k
+=
16
)
{
AA
= a
;
BB
= b
;
CC
= c
;
DD
= d
;
a
= FF
(a
, b
, c
, d
, x
[k
+
0
], S11
,
0xD76AA478
);
d
= FF
(d
, a
, b
, c
, x
[k
+
1
], S12
,
0xE8C7B756
);
c
= FF
(c
, d
, a
, b
, x
[k
+
2
], S13
,
0x242070DB
);
b
= FF
(b
, c
, d
, a
, x
[k
+
3
], S14
,
0xC1BDCEEE
);
a
= FF
(a
, b
, c
, d
, x
[k
+
4
], S11
,
0xF57C0FAF
);
d
= FF
(d
, a
, b
, c
, x
[k
+
5
], S12
,
0x4787C62A
);
c
= FF
(c
, d
, a
, b
, x
[k
+
6
], S13
,
0xA8304613
);
b
= FF
(b
, c
, d
, a
, x
[k
+
7
], S14
,
0xFD469501
);
a
= FF
(a
, b
, c
, d
, x
[k
+
8
], S11
,
0x698098D8
);
d
= FF
(d
, a
, b
, c
, x
[k
+
9
], S12
,
0x8B44F7AF
);
c
= FF
(c
, d
, a
, b
, x
[k
+
10
], S13
,
0xFFFF5BB1
);
b
= FF
(b
, c
, d
, a
, x
[k
+
11
], S14
,
0x895CD7BE
);
a
= FF
(a
, b
, c
, d
, x
[k
+
12
], S11
,
0x6B901122
);
d
= FF
(d
, a
, b
, c
, x
[k
+
13
], S12
,
0xFD987193
);
c
= FF
(c
, d
, a
, b
, x
[k
+
14
], S13
,
0xA679438E
);
b
= FF
(b
, c
, d
, a
, x
[k
+
15
], S14
,
0x49B40821
);
a
= GG
(a
, b
, c
, d
, x
[k
+
1
], S21
,
0xF61E2562
);
d
= GG
(d
, a
, b
, c
, x
[k
+
6
], S22
,
0xC040B340
);
c
= GG
(c
, d
, a
, b
, x
[k
+
11
], S23
,
0x265E5A51
);
b
= GG
(b
, c
, d
, a
, x
[k
+
0
], S24
,
0xE9B6C7AA
);
a
= GG
(a
, b
, c
, d
, x
[k
+
5
], S21
,
0xD62F105D
);
d
= GG
(d
, a
, b
, c
, x
[k
+
10
], S22
,
0x2441453
);
c
= GG
(c
, d
, a
, b
, x
[k
+
15
], S23
,
0xD8A1E681
);
b
= GG
(b
, c
, d
, a
, x
[k
+
4
], S24
,
0xE7D3FBC8
);
a
= GG
(a
, b
, c
, d
, x
[k
+
9
], S21
,
0x21E1CDE6
);
d
= GG
(d
, a
, b
, c
, x
[k
+
14
], S22
,
0xC33707D6
);
c
= GG
(c
, d
, a
, b
, x
[k
+
3
], S23
,
0xF4D50D87
);
b
= GG
(b
, c
, d
, a
, x
[k
+
8
], S24
,
0x455A14ED
);
a
= GG
(a
, b
, c
, d
, x
[k
+
13
], S21
,
0xA9E3E905
);
d
= GG
(d
, a
, b
, c
, x
[k
+
2
], S22
,
0xFCEFA3F8
);
c
= GG
(c
, d
, a
, b
, x
[k
+
7
], S23
,
0x676F02D9
);
b
= GG
(b
, c
, d
, a
, x
[k
+
12
], S24
,
0x8D2A4C8A
);
a
= HH
(a
, b
, c
, d
, x
[k
+
5
], S31
,
0xFFFA3942
);
d
= HH
(d
, a
, b
, c
, x
[k
+
8
], S32
,
0x8771F681
);
c
= HH
(c
, d
, a
, b
, x
[k
+
11
], S33
,
0x6D9D6122
);
b
= HH
(b
, c
, d
, a
, x
[k
+
14
], S34
,
0xFDE5380C
);
a
= HH
(a
, b
, c
, d
, x
[k
+
1
], S31
,
0xA4BEEA44
);
d
= HH
(d
, a
, b
, c
, x
[k
+
4
], S32
,
0x4BDECFA9
);
c
= HH
(c
, d
, a
, b
, x
[k
+
7
], S33
,
0xF6BB4B60
);
b
= HH
(b
, c
, d
, a
, x
[k
+
10
], S34
,
0xBEBFBC70
);
a
= HH
(a
, b
, c
, d
, x
[k
+
13
], S31
,
0x289B7EC6
);
d
= HH
(d
, a
, b
, c
, x
[k
+
0
], S32
,
0xEAA127FA
);
c
= HH
(c
, d
, a
, b
, x
[k
+
3
], S33
,
0xD4EF3085
);
b
= HH
(b
, c
, d
, a
, x
[k
+
6
], S34
,
0x4881D05
);
a
= HH
(a
, b
, c
, d
, x
[k
+
9
], S31
,
0xD9D4D039
);
d
= HH
(d
, a
, b
, c
, x
[k
+
12
], S32
,
0xE6DB99E5
);
c
= HH
(c
, d
, a
, b
, x
[k
+
15
], S33
,
0x1FA27CF8
);
b
= HH
(b
, c
, d
, a
, x
[k
+
2
], S34
,
0xC4AC5665
);
a
= II
(a
, b
, c
, d
, x
[k
+
0
], S41
,
0xF4292244
);
d
= II
(d
, a
, b
, c
, x
[k
+
7
], S42
,
0x432AFF97
);
c
= II
(c
, d
, a
, b
, x
[k
+
14
], S43
,
0xAB9423A7
);
b
= II
(b
, c
, d
, a
, x
[k
+
5
], S44
,
0xFC93A039
);
a
= II
(a
, b
, c
, d
, x
[k
+
12
], S41
,
0x655B59C3
);
d
= II
(d
, a
, b
, c
, x
[k
+
3
], S42
,
0x8F0CCC92
);
c
= II
(c
, d
, a
, b
, x
[k
+
10
], S43
,
0xFFEFF47D
);
b
= II
(b
, c
, d
, a
, x
[k
+
1
], S44
,
0x85845DD1
);
a
= II
(a
, b
, c
, d
, x
[k
+
8
], S41
,
0x6FA87E4F
);
d
= II
(d
, a
, b
, c
, x
[k
+
15
], S42
,
0xFE2CE6E0
);
c
= II
(c
, d
, a
, b
, x
[k
+
6
], S43
,
0xA3014314
);
b
= II
(b
, c
, d
, a
, x
[k
+
13
], S44
,
0x4E0811A1
);
a
= II
(a
, b
, c
, d
, x
[k
+
4
], S41
,
0xF7537E82
);
d
= II
(d
, a
, b
, c
, x
[k
+
11
], S42
,
0xBD3AF235
);
c
= II
(c
, d
, a
, b
, x
[k
+
2
], S43
,
0x2AD7D2BB
);
b
= II
(b
, c
, d
, a
, x
[k
+
9
], S44
,
0xEB86D391
);
a
= AddUnsigned
(a
, AA
);
b
= AddUnsigned
(b
, BB
);
c
= AddUnsigned
(c
, CC
);
d
= AddUnsigned
(d
, DD
);
}
var temp
= WordToHex
(a
)
+ WordToHex
(b
)
+ WordToHex
(c
)
+ WordToHex
(d
);
// return temp.toUpperCase();
return temp
.toLowerCase
();
}
function RotateLeft
(lValue
, iShiftBits
)
{
return
(lValue
<< iShiftBits
)
|
(lValue
>>>
(
32
- iShiftBits
));
}
function AddUnsigned
(lX
, lY
)
{
var lX4
, lY4
, lX8
, lY8
, lResult
;
lX8
=
(lX
&
0x80000000
);
lY8
=
(lY
&
0x80000000
);
lX4
=
(lX
&
0x40000000
);
lY4
=
(lY
&
0x40000000
);
lResult
=
(lX
&
0x3FFFFFFF
)
+
(lY
&
0x3FFFFFFF
);
if
(lX4
& lY4
)
{
return
(lResult
^
0x80000000
^ lX8
^ lY8
);
}
if
(lX4
| lY4
)
{
if
(lResult
&
0x40000000
)
{
return
(lResult
^
0xC0000000
^ lX8
^ lY8
);
}
else
{
return
(lResult
^
0x40000000
^ lX8
^ lY8
);
}
}
else
{
return
(lResult
^ lX8
^ lY8
);
}
}
function F
(x
, y
, z
)
{
return
(x
& y
)
|
((~x
)
& z
);
}
function G
(x
, y
, z
)
{
return
(x
& z
)
|
(y
&
(~z
));
}
function H
(x
, y
, z
)
{
return
(x
^ y
^ z
);
}
function I
(x
, y
, z
)
{
return
(y
^
(x
|
(~z
)));
}
function FF
(a
, b
, c
, d
, x
, s
, ac
)
{
a
= AddUnsigned
(a
, AddUnsigned
(AddUnsigned
(F
(b
, c
, d
), x
), ac
));
return AddUnsigned
(RotateLeft
(a
, s
), b
);
}
function GG
(a
, b
, c
, d
, x
, s
, ac
)
{
a
= AddUnsigned
(a
, AddUnsigned
(AddUnsigned
(G
(b
, c
, d
), x
), ac
));
return AddUnsigned
(RotateLeft
(a
, s
), b
);
}
function HH
(a
, b
, c
, d
, x
, s
, ac
)
{
a
= AddUnsigned
(a
, AddUnsigned
(AddUnsigned
(H
(b
, c
, d
), x
), ac
));
return AddUnsigned
(RotateLeft
(a
, s
), b
);
}
function II
(a
, b
, c
, d
, x
, s
, ac
)
{
a
= AddUnsigned
(a
, AddUnsigned
(AddUnsigned
(I
(b
, c
, d
), x
), ac
));
return AddUnsigned
(RotateLeft
(a
, s
), b
);
}
function ConvertToWordArray
(
string
)
{
var lWordCount
;
var lMessageLength
=
string
.length
;
var lNumberOfWords_temp1
= lMessageLength
+
8
;
var lNumberOfWords_temp2
=
(lNumberOfWords_temp1
-
(lNumberOfWords_temp1
%
64
))
/
64
;
var lNumberOfWords
=
(lNumberOfWords_temp2
+
1
)
*
16
;
var lWordArray
= Array
(lNumberOfWords
-
1
);
var lBytePosition
=
0
;
var lByteCount
=
0
;
while
(lByteCount
< lMessageLength
)
{
lWordCount
=
(lByteCount
-
(lByteCount
%
4
))
/
4
;
lBytePosition
=
(lByteCount
%
4
)
*
8
;
lWordArray
[lWordCount
]
=
(lWordArray
[lWordCount
]
|
(
string
.charCodeAt
(lByteCount
)
<< lBytePosition
));
lByteCount
++;
}
lWordCount
=
(lByteCount
-
(lByteCount
%
4
))
/
4
;
lBytePosition
=
(lByteCount
%
4
)
*
8
;
lWordArray
[lWordCount
]
= lWordArray
[lWordCount
]
|
(
0x80
<< lBytePosition
);
lWordArray
[lNumberOfWords
-
2
]
= lMessageLength
<<
3
;
lWordArray
[lNumberOfWords
-
1
]
= lMessageLength
>>>
29
;
return lWordArray
;
}
function WordToHex
(lValue
)
{
var WordToHexValue
=
""
, WordToHexValue_temp
=
""
, lByte
, lCount
;
for
(lCount
=
0
; lCount
<=
3
; lCount
++)
{
lByte
=
(lValue
>>>
(lCount
*
8
))
&
255
;
WordToHexValue_temp
=
"0"
+ lByte
.toString
(
16
);
WordToHexValue
= WordToHexValue
+ WordToHexValue_temp
.substr
(WordToHexValue_temp
.length
-
2
,
2
);
}
return WordToHexValue
;
}
function Utf8Encode
(
string
)
{
var utftext
=
""
;
for
(
var n
=
0
; n
<
string
.length
; n
++)
{
var c
=
string
.charCodeAt
(n
);
if
(c
<
128
)
{
utftext
+= String
.fromCharCode
(c
);
}
else
if
((c
>
127
)
&&
(c
<
2048
))
{
utftext
+= String
.fromCharCode
((c
>>
6
)
|
192
);
utftext
+= String
.fromCharCode
((c
&
63
)
|
128
);
}
else
{
utftext
+= String
.fromCharCode
((c
>>
12
)
|
224
);
utftext
+= String
.fromCharCode
(((c
>>
6
)
&
63
)
|
128
);
utftext
+= String
.fromCharCode
((c
&
63
)
|
128
);
}
}
return utftext
;
}