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Replace bit.lua with bitwise ops in asn1.lua

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dmiller
2017-03-29 20:58:36 +00:00
parent b75446db64
commit 783e0fb05c
1 changed files with 10 additions and 11 deletions
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21
nselib/asn1.lua
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@@ -17,7 +17,6 @@
-- o Each script or library should now create its own Encoder and Decoder instance
--
local bit = require "bit"
local math = require "math"
local stdnse = require "stdnse"
local string = require "string"
@@ -198,7 +197,7 @@ ASN1Decoder = {
repeat
octet, pos = string.unpack("B", encStr, pos)
n = n * 128 + bit.band(0x7F, octet)
n = n * 128 + (0x7F & octet)
until octet < 128
return n, pos
@@ -369,10 +368,10 @@ ASN1Encoder = {
-- IDENTIFIER.
encode_oid_component = function(n)
local parts = {}
parts[1] = string.char(bit.mod(n, 128))
parts[1] = string.char(n % 128)
while n >= 128 do
n = bit.rshift(n, 7)
parts[#parts + 1] = string.char(bit.mod(n, 128) + 0x80)
n = n >> 7
parts[#parts + 1] = string.char(n % 128 + 0x80)
end
return string.reverse(table.concat(parts))
end,
@@ -428,8 +427,8 @@ ASN1Encoder = {
local parts = {}
while len > 0 do
parts[#parts + 1] = string.char(bit.mod(len, 256))
len = bit.rshift(len, 8)
parts[#parts + 1] = string.char(len % 256)
len = len >> 8
end
assert(#parts < 128)
@@ -470,16 +469,16 @@ end
function intToBER( i )
local ber = {}
if bit.band( i, BERCLASS.Application ) == BERCLASS.Application then
if i & BERCLASS.Application == BERCLASS.Application then
ber.class = BERCLASS.Application
elseif bit.band( i, BERCLASS.ContextSpecific ) == BERCLASS.ContextSpecific then
elseif i & BERCLASS.ContextSpecific == BERCLASS.ContextSpecific then
ber.class = BERCLASS.ContextSpecific
elseif bit.band( i, BERCLASS.Private ) == BERCLASS.Private then
elseif i & BERCLASS.Private == BERCLASS.Private then
ber.class = BERCLASS.Private
else
ber.class = BERCLASS.Universal
end
if bit.band( i, 32 ) == 32 then
if i & 32 == 32 then
ber.constructed = true
ber.number = i - ber.class - 32
else