<%
private const bits_to_a_byte = 8
private const bytes_to_a_word = 4
private const bits_to_a_word = 32 
private m_lonbits(30)
private m_l2power(30)

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(31 - ishiftbits)) * 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 &h7ffffffe) \ m_l2power(ishiftbits)

 if (lvalue and &h80000000) then
  rshift = (rshift or (&h40000000 \ 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 lx8
 dim ly8
 dim lresult

 lx8 = lx and &h80000000
 ly8 = ly and &h80000000
 lx4 = lx and &h40000000
 ly4 = ly and &h40000000

 lresult = (lx and &h3fffffff) + (ly and &h3fffffff)

 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 lbyteposition
 dim 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) = lwordarray(lwordcount) or lshift(asc(mid(smessage, lbytecount + 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_lonbits(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_lonbits(27) = clng(268435455)
 m_lonbits(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, &h2441453
  md5_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_hh b, c, d, a, x(k + 14), s34, &hfde5380c
  md5_hh a, b, c, d, x(k + 1), s31, &ha4beea44
  md5_hh d, a, b, c, x(k + 4), s32, &h4bdecfa9
  md5_hh c, d, a, b, x(k + 7), s33, &hf6bb4b60
  md5_hh 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_hh 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_hh 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, &h8f0ccc92
  md5_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))
 'md5=lcase(wordtohex(b) & wordtohex(c))  'i crop this to fit 16byte database password :d
 
 md5=ucase(md5)
end function


public function md5_16(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_lonbits(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_lonbits(27) = clng(268435455)
 m_lonbits(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, &h2441453
  md5_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_hh b, c, d, a, x(k + 14), s34, &hfde5380c
  md5_hh a, b, c, d, x(k + 1), s31, &ha4beea44
  md5_hh d, a, b, c, x(k + 4), s32, &h4bdecfa9
  md5_hh c, d, a, b, x(k + 7), s33, &hf6bb4b60
  md5_hh 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_hh 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_hh 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, &h8f0ccc92
  md5_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))
 md5_16=lcase(wordtohex(b) & wordtohex(c))  'i crop this to fit 16byte database password :d
 
 md5_16=ucase(md5_16)
end function
'ΪMD5ĺ
%>

