Application example:
<%
e_pws = "abc"
DIM OBJMD5, E_PWS_ENC
Set Objmd5 = New CLSMD5
e_PWS_ENC = Objmd5.md5 (e_PWS)
%>
MD5.ASP file:
<%
Class CLSMD5
PRIVATE BITS_TO_A_BYTE
PRIVATE BYTES_TO_A_WORD
PRIVATE BITS_TO_A_WORD
Private m_lonbits (30)
Private M_L2Power (30)
Private sub coplass_initialize ()
BITS_TO_A_BYTE = 8
BYTES_TO_A_WORD = 4
BITS_TO_A_WORD = 32
End Sub
Private function lshift (Lvalue, iShiftBits)
IF iShiftBits = 0 THEN
Lshift = LVALUE
EXIT FUNCTION
Elseif ishiftBits = 31 THEN
IF Lvalue and 1 THEN
Lshift = & h80000000
Else
Lshift = 0
END IF
EXIT FUNCTION
Elseif IshiftBits <0 or iShiftBits> 31 THEN
Err.raise 6
END IF
IF (LValue and M_L2Power (31 - IshiftBits)) THEN
Lshift = ((Lvalue and M_lonbits (31 - (iShiftBits 1))) * m_l2power (iShiftBits)) or & h80000000
Else
Lshift = ((Lvalue and M_Lonbits) * m_l2power (iShiftBits))
END IF
END FUNCTION
Private function Rshift (Lvalue, IshiftBits)
IF iShiftBits = 0 THEN
Rshift = LVALUE
EXIT FUNCTION
Elseif ishiftBits = 31 THEN
If Lvalue and & H80000000 THEN
Rshift = 1
Else
Rshift = 0
END IF
EXIT FUNCTION
Elseif IshiftBits <0 or iShiftBits> 31 THEN
Err.raise 6
END IF
Rshift = (LValue and & H7ffffe) / M_L2Power (iShiftBits)
IF (Lvalue and & H80000000) THEN
Rshift = (RSHIFT OR (& H400000 / M_L2Power (IshiftBits - 1)))
END IF
END FUNCTION
Private function RotateLeft (Lvalue, iShiftBits)
Rotateleft = Lshift (Lvalue, IshiftBits) or Rshift (Lvalue, (32 - IshiftBits))
END FUNCTION
Private function addunsigned (lx, ly)
DIM LX4
DIM LY4
DIM LX8DIM LY8
DIM LRESULT
Lx8 = lx and & h80000000
LY8 = ly and & h80000000
LX4 = lx and & h40000000
LY4 = Ly and & H40000000
LRESULT = (lx and & h3ffffff) (Ly and & H3FFFFFF)
IF lx4 and ly4 Then
Lresult = LRESULT XOR & H80000000 XOR LX8 XOR LY8
Elseif Lx4 or Ly4 Then
If LRESULT AND & H40000000 THEN
LResult = LRESULT XOR & HC0000000 XOR LX8 XOR LY8
Else
Lresult = LRESULT XOR & H40000000 xor LX8 XOR LY8
END IF
Else
LResult = LRESULT XOR LX8 XOR LY8
END IF
Addunsigned = LRESULT
END FUNCTION
Private function MD5_f (x, y, z)
MD5_F = (x and y) OR ((not x) and z)
END FUNCTION
Private function MD5_G (x, y, z)
MD5_G = (x and z) OR (Y AND (NOT Z))
END FUNCTION
Private function MD5_H (x, y, z)
MD5_H = (x xor y xor z)
END FUNCTION
Private function MD5_i (x, y, z)
MD5_i = (y xor (x or (not z))))
END FUNCTION
Private SUB MD5_FF (A, B, C, D, X, S, AC)
A = AddunSigned (A, AddunSigned (addunsigned (MD5_F (B, C, D), X), AC)
a = rotateleft (a, s)
A = addunsigned (a, b)
End Sub
Private SUB MD5_GG (A, B, C, D, X, S, AC)
A = addunsigned (A, AddunSigned (addunsigned (MD5_G (B, C, D), X), AC)
a = rotateleft (a, s)
A = addunsigned (a, b)
End Sub
Private SUB MD5_HH (A, B, C, D, X, S, AC)
A = addunsigned (A, AddunSigned (addunsigned (MD5_H (B, C, D), X), AC)
a = rotateleft (a, s)
A = addunsigned (a, b)
End Sub
Private SUB MD5_II (A, B, C, D, X, S, AC)
A = AddunSigned (A, AddunSigned (AddunSigned (MD5_i (B, C, D), X), AC)
a = rotateleft (a, s)
A = addunsigned (a, b)
End Sub
Private function convertToWordArray (SMESSAGE)
Dim LMessageLength
Dim lnumberofwords
Dim lwordArray ()
Dim lbytepositiondim lbytecount
Dim lwordcount
Const modulus_bits = 512
Const congruent_bits = 448
LMessageLength = Len (SMESSAGE)
Lnumberofwords = ((LMessageLength ((MODULUS_BITS - CONGRUENT_BITS / BITS_TO_A_BYTE)) / (MODULUS_BITS / BITS_TO_A_BYTE)) 1) * (MODULUS_BITS / BITS_TO_A_WORD)
Redim LWordArray (LnumberofWords - 1)
lbyteposition = 0
lbytecount = 0
DO Until Lbytecount> = LMESSAGELENGTH
LWORDCOUNT = lbytecount / bytes_to_a_word
LbytePosition = (lbytecount mod bytes_to_a_word) * bits_to_a_byte
LWordArray (LWORDCOUNT) OR LSHIFT (ASC (MID (SMESSAGE, LBYTECUNT 1, 1)), LBYTEPOSITION
lbytecount = lbytecount 1
Loop
LWORDCOUNT = lbytecount / bytes_to_a_word
LbytePosition = (lbytecount mod bytes_to_a_word) * bits_to_a_byte
LWordArray (lwordcount) = lwordArray (lwordcount) or lshift (& H80, lbyteposition)
LWordArray (lnumberofwords - 2) = lshift (LMessageLength, 3)
LWordArray (Lnumberofwords - 1) = RSHIFT (LMessageLength, 29)
ConvertToWordArray = LWORDARRAY
END FUNCTION
Private function Wordtohex (LValue)
DIM LBYTE
DIM LCOUNT
For LCOUNT = 0 TO 3
Lbyte = RSHIFT (LVALUE, LCOUNT * BITS_TO_A_BYTE) AND M_LONBITS (Bits_TO_A_BYTE - 1)
Wordtohex = WordToHex & Right ("0" & HEX (LbyTe), 2)
NEXT
END FUNCTION
Public Function MD5 (SMESSAGE)
m_lonbits (0) = ClNG (1)
M_lonbits (1) = CLNG (3)
M_lonbits (2) = CLNG (7)
M_lonbits (3) = CLNG (15)
M_lonbits (4) = CLNG (31)
M_lonbits (5) = clng (63)
M_lonbit (6) = CLNG (127)
M_lonbits (7) = CLNG (255)
M_lonbits (8) = CLNG (511)
m_lonbits (9) = CLNG (1023)
M_lonbits (10) = CLNG (2047)
M_lonbits (11) = clng (4095) M_LONBITS (12) = CLNG (8191)
m_lonbits (13) = CLNG (16383)
M_lonbits (14) = CLNG (32767)
M_lonbits (15) = CLNG (65535)
M_lonbits (16) = CLNG (131071)
M_lonbits (17) = CLNG (262143)
M_lonbits (18) = CLNG (524287)
M_lonbits (19) = clng (1048575)
M_lonbits (20) = CLNG (2097151)
M_lonbits (21) = clng (4194303)
M_lonbits (22) = CLNG (8388607)
M_lonbits (23) = CLNG (16777215)
M_LONBITS (24) = CLNG (33554431)
M_LONBITS (25) = CLNG (67108863)
M_lonbits (26) = CLNG (134217727)
M_lonbit (27) = CLNG (268435455)
M_lonbit (28) = CLNG (536870911)
M_lonbits (29) = CLNG (1073741823)
M_lonbits (30) = clng (2147483647)
m_l2power (0) = CLNG (1)
M_L2Power (1) = CLNG (2)
M_L2Power (2) = CLNG (4)
M_L2Power (3) = CLNG (8)
M_L2Power (4) = CLNG (16)
M_L2Power (5) = CLNG (32)
M_L2Power (6) = CLNG (64)
M_L2Power (7) = clng (128)
M_L2Power (8) = CLNG (256)
M_L2Power (9) = CLNG (512)
M_L2Power (10) = CLNG (1024)
M_L2Power (11) = CLNG (2048)
M_L2Power (12) = CLNG (4096)
M_L2Power (13) = clng (8192)
M_L2Power (14) = CLNG (16384)
M_L2Power (15) = CLNG (32768)
M_L2Power (16) = CLNG (65536)
m_l2power (17) = CLNG (131072)
M_L2Power (18) = CLNG (262144)
M_L2Power (19) = CLNG (524288)
M_L2Power (20) = clng (1048576)
M_L2Power (21) = CLNG (2097152)
M_L2Power (22) = CLNG (4194304)
M_L2Power (23) = CLNG (8388608)
M_L2Power (24) = CLNG (16777216)
M_L2Power (25) = CLNG (33554432)
M_L2Power (26) = CLNG (67108864)
M_L2Power (27) = CLNG (134217728)
M_L2Power (28) = CLNG (268435456)
M_L2Power (29) = CLNG (536870912)
M_L2Power (30) = CLNG (1073741824)
DIM X
DIM K
DIM AA
DIM BB
DIM CC
DIM DD
DIM A
DIM B
DIM C
DIM D
Const S11 = 7
Const S12 = 12
Const S13 = 17
Const S14 = 22
Const S21 = 5
Const S22 = 9
Const S23 = 14
Const S24 = 20
Const S31 = 4
Const S32 = 11
Const S33 = 16
Const S34 = 23
Const S41 = 6
Const S42 = 10
Const S43 = 15
Const S44 = 21
x = ConvertToWordArray (SMESSAGE)
A = & h67452301
B = & hefcdab89
C = & H98BADCFE
D = & h10325476
For K = 0 to Ubound (x) STEP 16
AA = a
BB = B
CC = C
DD = D
MD5_FF A, B, C, D, X (K 0), S11, & HD76AA478
MD5_FF D, A, B, C, X (K 1), S12, & HE8C7B756
MD5_FF C, D, A, B, X (K 2), S13, & H242070DB
MD5_FF B, C, D, A, X (k 3), S14, & HC1BDCEEE
MD5_FF A, B, C, D, X (K 4), S11, & HF57C0FAF
MD5_FF D, A, B, C, X (K 5), S12, & H4787C62A
MD5_FF C, D, A, B, X (K 6), S13, & Ha8304613
MD5_FF B, C, D, A, X (K 7), S14, & HFD469501
MD5_FF A, B, C, D, X (K 8), S11, & H698098D8
MD5_FF D, A, B, C, X (K 9), S12, & H8B44F7AF
MD5_FF C, D, A, B, X (K 10), S13, & HFFFF5BB1
MD5_FF B, C, D, A, X (K 11), S14, & H895CD7BE
MD5_FF A, B, C, D, X (k 12), S11, & H6B901122
MD5_FF D, A, B, C, X (K 13), S12, & HFD987193
MD5_FF C, D, A, B, X (K 14), S13, & Ha679438E
MD5_FF B, C, D, A, X (K 15), S14, & H49B40821
MD5_GG A, B, C, D, X (K 1), S21, & HF61E2562
MD5_GG D, A, B, C, X (K 6), S22, & HC040B340
MD5_GG C, D, A, B, X (K 11), S23, & H265E5A51
MD5_GG B, C, D, A, X (k 0), S24, & HE9B6C7AA
MD5_GG A, B, C, D, X (K 5), S21, & HD62F105D
MD5_GG D, A, B, C, X (K 10), S22, & H2441453MD5_GG C, D, A, B, X (K 15), S23, & HD8A1E681
MD5_GG B, C, D, A, X (K 4), S24, & HE7D3FBC8
MD5_GG A, B, C, D, X (K 9), S21, & H21E1CDE6
MD5_GG D, A, B, C, X (k 14), S22, & HC33707D6
MD5_GG C, D, A, B, X (K 3), S23, & HF4D50D87
MD5_GG B, C, D, A, X (K 8), S24, & H455A14ED
MD5_GG A, B, C, D, X (K 13), S21, & HA9E3E905
MD5_GG D, A, B, C, X (K 2), S22, & HFCEFA3F8
MD5_GG C, D, A, B, X (K 7), S23, & H676F02D9
MD5_GG B, C, D, A, X (K 12), S24, & H8D2A4C8A
MD5_HH A, B, C, D, X (K 5), S31, & HFFFA3942
MD5_HH D, A, B, C, X (K 8), S32, & H8771F681
MD5_HH C, D, A, B, X (K 11), S33, & H6D9D6122
MD5_HHH B, C, D, A, X (k 14), S34, & HFDE5380C
MD5_HH A, B, C, D, X (k 1), S31, & Ha4bee44
MD5_HH D, A, B, C, X (K 4), S32, & H4BDECFA9
MD5_HH C, D, A, B, X (K 7), S33, & HF6BB4B60
MD5_HHH B, C, D, A, X (K 10), S34, & HBebfbc70
MD5_HH A, B, C, D, X (K 13), S31, & H289B7EC6
MD5_HH D, A, B, C, X (K 0), S32, & HeaA127FA
MD5_HH C, D, A, B, X (K 3), S33, & HD4EF3085
MD5_HHH B, C, D, A, X (K 6), S34, & H4881D05
MD5_HH A, B, C, D, X (K 9), S31, & HD9D4D039
MD5_HH D, A, B, C, X (K 12), S32, & HE6DB99E5
MD5_HH C, D, A, B, X (K 15), S33, & H1FA27CF8
MD5_HHH B, C, D, A, X (K 2), S34, & HC4AC5665
MD5_II A, B, C, D, X (K 0), S41, & HF4292244
MD5_II D, A, B, C, X (K 7), S42, & H432AFF97
MD5_II C, D, A, B, X (K 14), S43, & HAB9423A7
MD5_II B, C, D, A, X (k 5), S44, & HFC93A039
MD5_II A, B, C, D, X (k 12), S41, & H655B59C3
MD5_II D, A, B, C, X (K 3), S42, & H8F0CCC92MD5_II C, D, A, B, X (K 10), S43, & HFFEFF47D
MD5_II B, C, D, A, X (k 1), S44, & H85845DD1
MD5_II A, B, C, D, X (K 8), S41, & H6FA87E4F
MD5_II D, A, B, C, X (K 15), S42, & HFE2CE6E0
MD5_II C, D, A, B, X (K 6), S43, & HA3014314
MD5_II B, C, D, A, X (K 13), S44, & H4E0811A1
MD5_II A, B, C, D, X (K 4), S41, & HF7537E82
MD5_II D, A, B, C, X (K 11), S42, & HBD3AF235
MD5_II C, D, A, B, X (K 2), S43, & H2AD7D2BB
MD5_II B, C, D, A, X (K 9), S44, & HEB86D391
A = addunsigned (A, AA)
B = addunsigned (b, bb)
C = addunsigned (C, CC)
D = addunsigned (D, DD)
NEXT
MD5 = LCase (WordTohex (a) & WordTohex (B) & WordTohex (C) & WordToHex (D))
END FUNCTION
END CLASS
%>
