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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

if mdfive=16 then

md5=lcase(wordtohex(b) & wordtohex(c))

else

md5=ucase(wordtohex(a) & wordtohex(b) & wordtohex(c) & wordtohex(d))

end if

end function

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