| Current File : //proc/self/root/usr/share/nmap/nselib/ldap.lua |
---
-- Library methods for handling LDAP.
--
-- @author Patrik Karlsson
-- @copyright Same as Nmap--See http://nmap.org/book/man-legal.html
--
-- Credit goes out to Martin Swende who provided me with the initial code that got me started writing this.
--
-- Version 0.6
-- Created 01/12/2010 - v0.1 - Created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/28/2010 - v0.2 - Revised to fit better fit ASN.1 library
-- Revised 02/02/2010 - v0.3 - Revised to fit OO ASN.1 Library
-- Revised 09/05/2011 - v0.4 - Revised to include support for writing output to file, added decoding certain time
-- formats
-- Revised 10/29/2011 - v0.5 - Added support for performing wildcard searches via the substring filter.
-- Revised 10/30/2011 - v0.6 - Added support for the ldap extensibleMatch filter type for searches
--
local asn1 = require "asn1"
local bin = require "bin"
local io = require "io"
local nmap = require "nmap"
local os = require "os"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"
_ENV = stdnse.module("ldap", stdnse.seeall)
local ldapMessageId = 1
ERROR_MSG = {}
ERROR_MSG[1] = "Intialization of LDAP library failed."
ERROR_MSG[4] = "Size limit exceeded."
ERROR_MSG[13] = "Confidentiality required"
ERROR_MSG[32] = "No such object"
ERROR_MSG[34] = "Invalid DN"
ERROR_MSG[49] = "The supplied credential is invalid."
ERRORS = {
LDAP_SUCCESS = 0,
LDAP_SIZELIMIT_EXCEEDED = 4
}
-- Application constants
APPNO = {
BindRequest = 0,
BindResponse = 1,
UnbindRequest = 2,
SearchRequest = 3,
SearchResponse = 4,
SearchResDone = 5
}
-- Filter operation constants
FILTER = {
_and = 0,
_or = 1,
_not = 2,
equalityMatch = 3,
substrings = 4,
greaterOrEqual = 5,
lessOrEqual = 6,
present = 7,
approxMatch = 8,
extensibleMatch = 9
}
-- Scope constants
SCOPE = {
base=0,
one=1,
sub= 2,
children=3,
default = 0
}
-- Deref policy constants
DEREFPOLICY = {
never=0,
searching=1,
finding = 2,
always=3,
default = 0
}
-- LDAP specific tag encoders
local tagEncoder = {}
tagEncoder['table'] = function(self, val)
if (val._ldap == '0A') then
local ival = self.encodeInt(val[1])
local len = self.encodeLength(#ival)
return bin.pack('HAA', '0A', len, ival)
end
if (val._ldaptype) then
local len
if val[1] == nil or #val[1] == 0 then
return bin.pack('HC', val._ldaptype, 0)
else
len = self.encodeLength(#val[1])
return bin.pack('HAA', val._ldaptype, len, val[1])
end
end
local encVal = ""
for _, v in ipairs(val) do
encVal = encVal .. encode(v) -- todo: buffer?
end
local tableType = bin.pack("H", "30")
if (val["_snmp"]) then
tableType = bin.pack("H", val["_snmp"])
end
return bin.pack('AAA', tableType, self.encodeLength(#encVal), encVal)
end
---
-- Encodes a given value according to ASN.1 basic encoding rules for SNMP
-- packet creation.
-- @param val Value to be encoded.
-- @return Encoded value.
function encode(val)
local encoder = asn1.ASN1Encoder:new()
local encValue
encoder:registerTagEncoders(tagEncoder)
encValue = encoder:encode(val)
if encValue then
return encValue
end
return ''
end
-- LDAP specific tag decoders
local tagDecoder = {}
tagDecoder["0A"] = function( self, encStr, elen, pos )
return self.decodeInt(encStr, elen, pos)
end
tagDecoder["8A"] = function( self, encStr, elen, pos )
return bin.unpack("A" .. elen, encStr, pos)
end
-- null decoder
tagDecoder["31"] = function( self, encStr, elen, pos )
return pos, nil
end
---
-- Decodes an LDAP packet or a part of it according to ASN.1 basic encoding
-- rules.
-- @param encStr Encoded string.
-- @param pos Current position in the string.
-- @return The position after decoding
-- @return The decoded value(s).
function decode(encStr, pos)
-- register the LDAP specific tag decoders
local decoder = asn1.ASN1Decoder:new()
decoder:registerTagDecoders( tagDecoder )
return decoder:decode( encStr, pos )
end
---
-- Decodes a sequence according to ASN.1 basic encoding rules.
-- @param encStr Encoded string.
-- @param len Length of sequence in bytes.
-- @param pos Current position in the string.
-- @return The position after decoding.
-- @return The decoded sequence as a table.
local function decodeSeq(encStr, len, pos)
local seq = {}
local sPos = 1
local sStr
pos, sStr = bin.unpack("A" .. len, encStr, pos)
if(sStr==nil) then
return pos,seq
end
while (sPos < len) do
local newSeq
sPos, newSeq = decode(sStr, sPos)
table.insert(seq, newSeq)
end
return pos, seq
end
-- Encodes an LDAP Application operation and its data as a sequence
--
-- @param appno LDAP application number @see <code>APPNO</code>
-- @param isConstructed boolean true if constructed, false if primitive
-- @param data string containing the LDAP operation content
-- @return string containing the encoded LDAP operation
function encodeLDAPOp( appno, isConstructed, data )
local encoded_str = ""
local asn1_type = asn1.BERtoInt( asn1.BERCLASS.Application, isConstructed, appno )
encoded_str = encode( { _ldaptype = bin.pack("A", string.format("%X", asn1_type)), data } )
return encoded_str
end
--- Performs an LDAP Search request
--
-- This function has a concept of softerrors which populates the return tables error information
-- while returning a true status. The reason for this is that LDAP may return a number of records
-- and then finnish of with an error like SIZE LIMIT EXCEEDED. We still want to return the records
-- that were received prior to the error. In order to achieve this and not terminating the script
-- by returning a false status a true status is returned together with a table containing all searchentries.
-- This table has the <code>errorMessage</code> and <code>resultCode</code> entries set with the error information.
-- As a <code>try</code> won't catch this error it's up to the script to do so. See ldap-search.nse for an example.
--
-- @param socket socket already connected to the ldap server
-- @param params table containing at least <code>scope</code>, <code>derefPolicy</code>, <code>baseObject</code>
-- the field <code>maxObjects</code> may also be included to restrict the amount of records returned
-- @return success true or false.
-- @return err string containing error message
function searchRequest( socket, params )
local searchResEntries = { errorMessage="", resultCode = 0}
local catch = function() socket:close() stdnse.print_debug(string.format("SearchRequest failed")) end
local try = nmap.new_try(catch)
local attributes = params.attributes
local request = encode(params.baseObject)
local attrSeq = ''
local requestData, messageSeq, data
local maxObjects = params.maxObjects or -1
local encoder = asn1.ASN1Encoder:new()
local decoder = asn1.ASN1Decoder:new()
encoder:registerTagEncoders(tagEncoder)
decoder:registerTagDecoders(tagDecoder)
request = request .. encode( { _ldap='0A', params.scope } )--scope
request = request .. encode( { _ldap='0A', params.derefPolicy } )--derefpolicy
request = request .. encode( params.sizeLimit or 0)--sizelimit
request = request .. encode( params.timeLimit or 0)--timelimit
request = request .. encode( params.typesOnly or false)--TypesOnly
if params.filter then
request = request .. createFilter( params.filter )
else
request = request .. encode( { _ldaptype='87', "objectclass" } )-- filter : string, presence
end
if attributes~= nil then
for _,attr in ipairs(attributes) do
attrSeq = attrSeq .. encode(attr)
end
end
request = request .. encoder:encodeSeq(attrSeq)
requestData = encodeLDAPOp(APPNO.SearchRequest, true, request)
messageSeq = encode(ldapMessageId)
ldapMessageId = ldapMessageId +1
messageSeq = messageSeq .. requestData
data = encoder:encodeSeq(messageSeq)
try( socket:send( data ) )
data = ""
while true do
local len, pos, messageId = 0, 2, -1
local tmp = ""
local _, objectName, attributes, ldapOp
local attributes
local searchResEntry = {}
if ( maxObjects == 0 ) then
break
elseif ( maxObjects > 0 ) then
maxObjects = maxObjects - 1
end
if data:len() > 6 then
pos, len = decoder.decodeLength( data, pos )
else
data = data .. try( socket:receive() )
pos, len = decoder.decodeLength( data, pos )
end
-- pos should be at the right position regardless if length is specified in 1 or 2 bytes
while ( len + pos - 1 > data:len() ) do
data = data .. try( socket:receive() )
end
pos, messageId = decode( data, pos )
pos, tmp = bin.unpack("C", data, pos)
pos, len = decoder.decodeLength( data, pos )
ldapOp = asn1.intToBER( tmp )
searchResEntry = {}
if ldapOp.number == APPNO.SearchResDone then
pos, searchResEntry.resultCode = decode( data, pos )
-- errors may occur after a large amount of data has been received (eg. size limit exceeded)
-- we want to be able to return the data received prior to this error to the user
-- however, we also need to alert the user of the error. This is achieved through "softerrors"
-- softerrors populate the error fields of the table while returning a true status
-- this allows for the caller to output data while still being able to catch the error
if ( searchResEntry.resultCode ~= 0 ) then
local error_msg
pos, searchResEntry.matchedDN = decode( data, pos )
pos, searchResEntry.errorMessage = decode( data, pos )
error_msg = ERROR_MSG[searchResEntry.resultCode]
-- if the table is empty return a hard error
if #searchResEntries == 0 then
return false, string.format("Code: %d|Error: %s|Details: %s", searchResEntry.resultCode, error_msg or "", searchResEntry.errorMessage or "" )
else
searchResEntries.errorMessage = string.format("Code: %d|Error: %s|Details: %s", searchResEntry.resultCode, error_msg or "", searchResEntry.errorMessage or "" )
searchResEntries.resultCode = searchResEntry.resultCode
return true, searchResEntries
end
end
break
end
pos, searchResEntry.objectName = decode( data, pos )
if ldapOp.number == APPNO.SearchResponse then
pos, searchResEntry.attributes = decode( data, pos )
table.insert( searchResEntries, searchResEntry )
end
if data:len() > pos then
data = data:sub(pos)
else
data = ""
end
end
return true, searchResEntries
end
--- Attempts to bind to the server using the credentials given
--
-- @param socket socket already connected to the ldap server
-- @param params table containing <code>version</code>, <code>username</code> and <code>password</code>
-- @return success true or false
-- @return err string containing error message
function bindRequest( socket, params )
local catch = function() socket:close() stdnse.print_debug(string.format("bindRequest failed")) end
local try = nmap.new_try(catch)
local ldapAuth = encode( { _ldaptype = 80, params.password } )
local bindReq = encode( params.version ) .. encode( params.username ) .. ldapAuth
local ldapMsg = encode(ldapMessageId) .. encodeLDAPOp( APPNO.BindRequest, true, bindReq )
local packet
local pos, packet_len, resultCode, tmp, len, _
local response = {}
local encoder = asn1.ASN1Encoder:new()
local decoder = asn1.ASN1Decoder:new()
encoder:registerTagEncoders(tagEncoder)
decoder:registerTagDecoders(tagDecoder)
packet = encoder:encodeSeq( ldapMsg )
ldapMessageId = ldapMessageId +1
try( socket:send( packet ) )
packet = try( socket:receive() )
pos, packet_len = decoder.decodeLength( packet, 2 )
pos, response.messageID = decode( packet, pos )
pos, tmp = bin.unpack("C", packet, pos)
pos, len = decoder.decodeLength( packet, pos )
response.protocolOp = asn1.intToBER( tmp )
if response.protocolOp.number ~= APPNO.BindResponse then
return false, string.format("Recieved incorrect Op in packet: %d, expected %d", response.protocolOp.number, APPNO.BindResponse)
end
pos, response.resultCode = decode( packet, pos )
if ( response.resultCode ~= 0 ) then
local error_msg
pos, response.matchedDN = decode( packet, pos )
pos, response.errorMessage = decode( packet, pos )
error_msg = ERROR_MSG[response.resultCode]
return false, string.format("\n Error: %s\n Details: %s",
error_msg or "Unknown error occured (code: " .. response.resultCode ..
")", response.errorMessage or "" )
else
return true, "Success"
end
end
--- Performs an LDAP Unbind
--
-- @param socket socket already connected to the ldap server
-- @return success true or false
-- @return err string containing error message
function unbindRequest( socket )
local ldapMsg, packet
local catch = function() socket:close() stdnse.print_debug(string.format("bindRequest failed")) end
local try = nmap.new_try(catch)
local encoder = asn1.ASN1Encoder:new()
encoder:registerTagEncoders(tagEncoder)
ldapMessageId = ldapMessageId +1
ldapMsg = encode( ldapMessageId )
ldapMsg = ldapMsg .. encodeLDAPOp( APPNO.UnbindRequest, false, nil)
packet = encoder:encodeSeq( ldapMsg )
try( socket:send( packet ) )
return true, ""
end
--- Creates an ASN1 structure from a filter table
--
-- @param filter table containing the filter to be created
-- @return string containing the ASN1 byte sequence
function createFilter( filter )
local asn1_type = asn1.BERtoInt( asn1.BERCLASS.ContextSpecific, true, filter.op )
local filter_str = ""
if type(filter.val) == 'table' then
for _, v in ipairs( filter.val ) do
filter_str = filter_str .. createFilter( v )
end
else
local obj = encode( filter.obj )
local val = ''
if ( filter.op == FILTER['substrings'] ) then
local tmptable = stdnse.strsplit('*', filter.val)
local tmp_result = ''
if (#tmptable <= 1 ) then
-- 0x81 = 10000001 = 10 0 00001
-- hex binary Context Primitive value Field: Sequence Value: 1 (any / any position in string)
tmp_result = bin.pack('HAA' , '81', string.char(#filter.val), filter.val)
else
for indexval, substr in ipairs(tmptable) do
if (indexval == 1) and (substr ~= '') then
-- 0x81 = 10000000 = 10 0 00000
-- hex binary Context Primitive value Field: Sequence Value: 0 (initial / match at start of string)
tmp_result = bin.pack('HAA' , '80', string.char(#substr), substr)
end
if (indexval ~= #tmptable) and (indexval ~= 1) and (substr ~= '') then
-- 0x81 = 10000001 = 10 0 00001
-- hex binary Context Primitive value Field: Sequence Value: 1 (any / match in any position in string)
tmp_result = tmp_result .. bin.pack('HAA' , '81', string.char(#substr), substr)
end
if (indexval == #tmptable) and (substr ~= '') then
-- 0x82 = 10000010 = 10 0 00010
-- hex binary Context Primitive value Field: Sequence Value: 2 (final / match at end of string)
tmp_result = tmp_result .. bin.pack('HAA' , '82', string.char(#substr), substr)
end
end
end
val = asn1.ASN1Encoder:encodeSeq( tmp_result )
elseif ( filter.op == FILTER['extensibleMatch'] ) then
local tmptable = stdnse.strsplit(':=', filter.val)
local tmp_result = ''
local OID, bitmask
if ( tmptable[1] ~= nil ) then
OID = tmptable[1]
else
return false, ("ERROR: Invalid extensibleMatch query format")
end
if ( tmptable[2] ~= nil ) then
bitmask = tmptable[2]
else
return false, ("ERROR: Invalid extensibleMatch query format")
end
-- Format and create matchingRule using OID
-- 0x81 = 10000001 = 10 0 00001
-- hex binary Context Primitive value Field: matchingRule Value: 1
tmp_result = bin.pack('HAA' , '81', string.char(#OID), OID)
-- Format and create type using ldap attribute
-- 0x82 = 10000010 = 10 0 00010
-- hex binary Context Primitive value Field: Type Value: 2
tmp_result = tmp_result .. bin.pack('HAA' , '82', string.char(#filter.obj), filter.obj)
-- Format and create matchValue using bitmask
-- 0x83 = 10000011 = 10 0 00011
-- hex binary Context Primitive value Field: matchValue Value: 3
tmp_result = tmp_result .. bin.pack('HAA' , '83', string.char(#bitmask), bitmask)
-- Format and create dnAttributes, defaulting to false
-- 0x84 = 10000100 = 10 0 00100
-- hex binary Context Primitive value Field: dnAttributes Value: 4
--
-- 0x01 = field length
-- 0x00 = boolean value, in this case false
tmp_result = tmp_result .. bin.pack('H' , '840100')
-- Format the overall extensibleMatch block
-- 0xa9 = 10101001 = 10 1 01001
-- hex binary Context Constructed Field: Filter Value: 9 (extensibleMatch)
return bin.pack('HAA' , 'a9', asn1.ASN1Encoder.encodeLength(#tmp_result), tmp_result)
else
val = encode( filter.val )
end
filter_str = filter_str .. obj .. val
end
return encode( { _ldaptype=bin.pack("A", string.format("%X", asn1_type)), filter_str } )
end
--- Converts a search result as received from searchRequest to a "result" table
--
-- Does some limited decoding of LDAP attributes
--
-- TODO: Add decoding of missing attributes
-- TODO: Add decoding of userParameters
-- TODO: Add decoding of loginHours
--
-- @param searchEntries table as returned from searchRequest
-- @return table suitable for <code>stdnse.format_output</code>
function searchResultToTable( searchEntries )
local result = {}
for _, v in ipairs( searchEntries ) do
local result_part = {}
if v.objectName and v.objectName:len() > 0 then
result_part.name = string.format("dn: %s", v.objectName)
else
result_part.name = "<ROOT>"
end
local attribs = {}
if ( v.attributes ~= nil ) then
for _, attrib in ipairs( v.attributes ) do
for i=2, #attrib do
-- do some additional Windows decoding
if ( attrib[1] == "objectSid" ) then
table.insert( attribs, string.format( "%s: %d", attrib[1], decode( attrib[i] ) ) )
elseif ( attrib[1] == "objectGUID") then
local _, o1, o2, o3, o4, o5, o6, o7, o8, o9, oa, ob, oc, od, oe, of = bin.unpack("C16", attrib[i] )
table.insert( attribs, string.format( "%s: %x%x%x%x-%x%x-%x%x-%x%x-%x%x%x%x%x", attrib[1], o4, o3, o2, o1, o5, o6, o7, o8, o9, oa, ob, oc, od, oe, of ) )
elseif ( attrib[1] == "lastLogon" or attrib[1] == "lastLogonTimestamp" or attrib[1] == "pwdLastSet" or attrib[1] == "accountExpires" or attrib[1] == "badPasswordTime" ) then
table.insert( attribs, string.format( "%s: %s", attrib[1], convertADTimeStamp(attrib[i]) ) )
elseif ( attrib[1] == "whenChanged" or attrib[1] == "whenCreated" or attrib[1] == "dSCorePropagationData" ) then
table.insert( attribs, string.format( "%s: %s", attrib[1], convertZuluTimeStamp(attrib[i]) ) )
else
table.insert( attribs, string.format( "%s: %s", attrib[1], attrib[i] ) )
end
end
end
table.insert( result_part, attribs )
end
table.insert( result, result_part )
end
return result
end
--- Saves a search result as received from searchRequest to a file
--
-- Does some limited decoding of LDAP attributes
--
-- TODO: Add decoding of missing attributes
-- TODO: Add decoding of userParameters
-- TODO: Add decoding of loginHours
--
-- @param searchEntries table as returned from searchRequest
-- @param filename the name of a save to save results to
-- @return table suitable for <code>stdnse.format_output</code>
function searchResultToFile( searchEntries, filename )
local f = io.open( filename, "w")
if ( not(f) ) then
return false, ("ERROR: Failed to open file (%s)"):format(filename)
end
-- Build table structure. Using a multi pass approach ( build table then populate table )
-- because the objects returned may not necessarily have the same number of attributes
-- making single pass CSV output generation problematic.
-- Unfortunately the searchEntries table passed to this function is not organized in a
-- way that make particular attributes for a given hostname directly addressable.
--
-- At some point restructuring the searchEntries table may be a good optimization target
-- build table of attributes
local attrib_table = {}
for _, v in ipairs( searchEntries ) do
if ( v.attributes ~= nil ) then
for _, attrib in ipairs( v.attributes ) do
for i=2, #attrib do
if ( attrib_table[attrib[1]] == nil ) then
attrib_table[attrib[1]] = ''
end
end
end
end
end
-- build table of hosts
local host_table = {}
for _, v in ipairs( searchEntries ) do
if v.objectName and v.objectName:len() > 0 then
local host = {}
if v.objectName and v.objectName:len() > 0 then
-- use a copy of the table here, assigning attrib_table into host_table
-- links the values so setting it for one host changes the specific attribute
-- values for all hosts.
host_table[v.objectName] = {attributes = copyTable(attrib_table) }
end
end
end
-- populate the host table with values for each attribute that has valid data
for _, v in ipairs( searchEntries ) do
if ( v.attributes ~= nil ) then
for _, attrib in ipairs( v.attributes ) do
for i=2, #attrib do
-- do some additional Windows decoding
if ( attrib[1] == "objectSid" ) then
host_table[string.format("%s", v.objectName)].attributes[attrib[1]] = string.format( "%d", decode( attrib[i] ) )
elseif ( attrib[1] == "objectGUID") then
local _, o1, o2, o3, o4, o5, o6, o7, o8, o9, oa, ob, oc, od, oe, of = bin.unpack("C16", attrib[i] )
host_table[string.format("%s", v.objectName)].attributes[attrib[1]] = string.format( "%x%x%x%x-%x%x-%x%x-%x%x-%x%x%x%x%x", o4, o3, o2, o1, o5, o6, o7, o8, o9, oa, ob, oc, od, oe, of )
elseif ( attrib[1] == "lastLogon" or attrib[1] == "lastLogonTimestamp" or attrib[1] == "pwdLastSet" or attrib[1] == "accountExpires" or attrib[1] == "badPasswordTime" ) then
host_table[string.format("%s", v.objectName)].attributes[attrib[1]] = convertADTimeStamp(attrib[i])
elseif ( attrib[1] == "whenChanged" or attrib[1] == "whenCreated" or attrib[1] == "dSCorePropagationData" ) then
host_table[string.format("%s", v.objectName)].attributes[attrib[1]] = convertZuluTimeStamp(attrib[i])
else
host_table[v.objectName].attributes[attrib[1]] = string.format( "%s", attrib[i] )
end
end
end
end
end
-- write the new, fully populuated table out to CSV
-- initialize header row
local output = "\"name\""
for attribute, value in pairs(attrib_table) do
output = output .. ",\"" .. attribute .. "\""
end
output = output .. "\n"
-- gather host data from fields, add to output.
for name, attribs in pairs(host_table) do
output = output .. "\"" .. name .. "\""
local host_attribs = attribs.attributes
for attribute, value in pairs(attrib_table) do
output = output .. ",\"" .. host_attribs[attribute] .. "\""
end
output = output .. "\n"
end
-- write the output to file
if ( not(f:write( output .."\n" ) ) ) then
f:close()
return false, ("ERROR: Failed to write file (%s)"):format(filename)
end
f:close()
return true
end
--- Extract naming context from a search response
--
-- @param searchEntries table containing searchEntries from a searchResponse
-- @param attributeName string containing the attribute to extract
-- @return table containing the attribute values
function extractAttribute( searchEntries, attributeName )
local attributeTbl = {}
for _, v in ipairs( searchEntries ) do
if ( v.attributes ~= nil ) then
for _, attrib in ipairs( v.attributes ) do
local attribType = attrib[1]
for i=2, #attrib do
if ( attribType:upper() == attributeName:upper() ) then
table.insert( attributeTbl, attrib[i])
end
end
end
end
end
return ( #attributeTbl > 0 and attributeTbl or nil )
end
--- Convert Microsoft Active Directory timestamp format to a human readable form
-- These values store time values in 100 nanoseconds segments from 01-Jan-1601
--
-- @param timestamp Microsoft Active Directory timestamp value
-- @return string containing human readable form
function convertADTimeStamp(timestamp)
local result = 0
local base_time = tonumber(os.time({year=1601, month=1, day=1, hour=0, minute=0, sec =0}))
timestamp = tonumber(timestamp)
if (timestamp and timestamp > 0) then
-- The result value was 3036 seconds off what Microsoft says it should be.
-- I have been unable to find an explaination for this, and have resorted to
-- manually adjusting the formula.
result = ( timestamp / 10000000 ) - 3036
result = result + base_time
result = os.date("%Y/%m/%d %H:%M:%S UTC", result)
else
result = 'Never'
end
return result
end
--- Converts a non-delimited Zulu timestamp format to a human readable form
-- For example 20110904003302.0Z becomes 2001/09/04 00:33:02 UTC
--
--
-- @param timestamp in Zulu format without seperators
-- @return string containing human readable form
function convertZuluTimeStamp(timestamp)
if ( type(timestamp) == 'string' and string.sub(timestamp,-3) == '.0Z' ) then
local year = string.sub(timestamp,1,4)
local month = string.sub(timestamp,5,6)
local day = string.sub(timestamp,7,8)
local hour = string.sub(timestamp,9,10)
local mins = string.sub(timestamp,11,12)
local secs = string.sub(timestamp,13,14)
local result = year .. "/" .. month .. "/" .. day .. " " .. hour .. ":" .. mins .. ":" .. secs .. " UTC"
return result
else
return 'Invalid date format'
end
end
--- Creates a copy of a table
--
--
-- @param targetTable table object to copy
-- @return table object containing copy of original
function copyTable(targetTable)
local temp = { }
for key, val in pairs(targetTable) do
temp[key] = val
end
return setmetatable(temp, getmetatable(targetTable))
end
return _ENV;