ASP可逆演算法 (轉)

ASP可逆演算法 (轉)[@more@]unction encrypt(ecode)
Dim texts
dim i
for i=1 to len(ecode)
texts=texts & chr(asc(mid(ecode,i,1))+i)
next
  encrypt = texts
end function
function decrypt(dcode)
  dim texts
dim i
for i=1 to len(dcode)
texts=texts & chr(asc(mid(dcode,i,1))-i)
next
decrypt=texts
end function
function mistake(preString)
  Dim texts
  Dim seed
  Dim i,length
  prestring = trim(preString)
  length = len(preString)
  seed = length
  Ranize(length)
  texts = ""
  for i = 1 to length
  seed = int(94*rnd(-asc(mid(preString,i,1))-seed*asc(right(prestring,1)))+32)
  texts = texts & chr(seed) & chr(int(94*rnd(-seed)+32))
  next
dim dist
dist=""
for i = 1 to len(texts)
  if mid(texts,i,1)<>"'"  then
  dist=dist+mid(texts,i,1)
  end if
  next
  mistake = dist
end function