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[NSE] Significantly shortend hextobin function for packet module.

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This commit is contained in:
batrick 2009-05-06 08:32:59 +00:00
parent b32ff0f98c
commit b32881993a
1 changed files with 3 additions and 28 deletions
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31
nselib/packet.lua
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@ -613,34 +613,9 @@ end
-- hextobin("\\41\\42\\43") --> "ABC"
-- hextobin(" 41 42 43 ") --> "ABC"
function hextobin(str)
local ret = ""
local a,b
if not str then -- nil
return ""
end
for c in string.gmatch(str, "[0-9a-fA-F][0-9a-fA-F]") do
a = string.byte(c:sub(1,1))
b = string.byte(c:sub(2,2))
if a >= string.byte('a') then -- 97>a-f
a = a - string.byte('a') + 10
elseif a >= string.byte('A') then -- 65>A-F
a = a - string.byte('A') + 10
else -- 48> 0-9
a = a - string.byte('0')
end
if b >= string.byte('a') then -- 97>a-f
b = b - string.byte('a') + 10
elseif b >= string.byte('A') then -- 65>A-F
b = b - string.byte('A') + 10
else -- 48> 0-9
b = b - string.byte('0')
end
--io.write(string.format(">%s %i %i\n",c, a, b))
ret = ret .. string.char(a*16 + b)
end
--io.write(string.format(">%s|%s<\n",bintohex(ret), str))
return ret
return (string.gsub(str, "%X*(%x%x)%X*", function(a)
return string.char(tonumber(a, 16));
end));
end