From 0e7f11673cfd221977295b34a16e5f2299c37f2d Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Sat, 25 Mar 2017 13:39:44 +0000
Subject: [PATCH] Change more bin lib to string packing/fromhex. Closes #755.
 Closes #769

---
 scripts/broadcast-eigrp-discovery.nse |  2 +-
 scripts/broadcast-igmp-discovery.nse  |  2 +-
 scripts/broadcast-pc-duo.nse          |  5 ++---
 scripts/broadcast-pim-discovery.nse   |  2 +-
 scripts/dns-nsec3-enum.nse            |  2 +-
 scripts/enip-info.nse                 |  2 +-
 scripts/firewalk.nse                  |  8 ++++----
 scripts/ipidseq.nse                   |  2 +-
 scripts/krb5-enum-users.nse           |  4 ++--
 scripts/ldap-novell-getpass.nse       |  6 +++---
 scripts/maxdb-info.nse                |  6 +++---
 scripts/mikrotik-routeros-brute.nse   |  2 +-
 scripts/mrinfo.nse                    |  2 +-
 scripts/mtrace.nse                    |  2 +-
 scripts/mysql-enum.nse                |  2 +-
 scripts/omron-info.nse                |  4 ++--
 scripts/path-mtu.nse                  |  6 +++---
 scripts/pcanywhere-brute.nse          |  8 ++++----
 scripts/qscan.nse                     |  2 +-
 scripts/rdp-vuln-ms12-020.nse         | 12 ++++++------
 scripts/rmi-vuln-classloader.nse      |  3 ++-
 scripts/s7-info.nse                   | 12 ++++++------
 scripts/smb-vuln-ms10-054.nse         |  2 +-
 scripts/telnet-encryption.nse         |  2 +-
 24 files changed, 50 insertions(+), 50 deletions(-)

diff --git a/scripts/broadcast-eigrp-discovery.nse b/scripts/broadcast-eigrp-discovery.nse
index c0df938ea..ca9afa4f1 100644
--- a/scripts/broadcast-eigrp-discovery.nse
+++ b/scripts/broadcast-eigrp-discovery.nse
@@ -94,7 +94,7 @@ local eigrpSend = function(interface, eigrp_raw)
   local srcip = interface.address
   local dstip = "224.0.0.10"
 
-  local ip_raw = bin.pack("H", "45c00040ed780000015818bc0a00c8750a00c86b") .. eigrp_raw
+  local ip_raw = stdnse.fromhex( "45c00040ed780000015818bc0a00c8750a00c86b") .. eigrp_raw
   local eigrp_packet = packet.Packet:new(ip_raw, ip_raw:len())
   eigrp_packet:ip_set_bin_src(ipOps.ip_to_str(srcip))
   eigrp_packet:ip_set_bin_dst(ipOps.ip_to_str(dstip))
diff --git a/scripts/broadcast-igmp-discovery.nse b/scripts/broadcast-igmp-discovery.nse
index 64b8d7e17..59deb3ad2 100644
--- a/scripts/broadcast-igmp-discovery.nse
+++ b/scripts/broadcast-igmp-discovery.nse
@@ -256,7 +256,7 @@ igmpQuery = function(interface, version)
   else
     local igmp_raw = igmpRaw(interface, version)
 
-    local ip_raw = bin.pack("H", "45c00040ed780000010218bc0a00c8750a00c86b") .. igmp_raw
+    local ip_raw = stdnse.fromhex( "45c00040ed780000010218bc0a00c8750a00c86b") .. igmp_raw
     local igmp_packet = packet.Packet:new(ip_raw, ip_raw:len())
     igmp_packet:ip_set_bin_src(ipOps.ip_to_str(srcip))
     igmp_packet:ip_set_bin_dst(ipOps.ip_to_str(dstip))
diff --git a/scripts/broadcast-pc-duo.nse b/scripts/broadcast-pc-duo.nse
index a9f4e03e2..f8e901613 100644
--- a/scripts/broadcast-pc-duo.nse
+++ b/scripts/broadcast-pc-duo.nse
@@ -1,4 +1,3 @@
-local bin = require "bin"
 local coroutine = require "coroutine"
 local nmap = require "nmap"
 local os = require "os"
@@ -90,7 +89,7 @@ action = function()
     {
       host = { ip = "255.255.255.255" },
       port = { number = 1505, protocol = "udp" },
-      data =  bin.pack("H", "00808008ff00"),
+      data =  stdnse.fromhex("00808008ff00"),
       match= "^.........(%w*)\0",
       topic= "PC-Duo Hosts"
     },
@@ -98,7 +97,7 @@ action = function()
     {
       host = { ip = "255.255.255.255" },
       port = { number = 2303, protocol = "udp" },
-      data =  bin.pack("H", "20908008ff00"),
+      data =  stdnse.fromhex("20908008ff00"),
       match= "^.........(%w*)\0",
       topic= "PC-Duo Gateway Server"
     },
diff --git a/scripts/broadcast-pim-discovery.nse b/scripts/broadcast-pim-discovery.nse
index ac386835a..08adcf1bf 100644
--- a/scripts/broadcast-pim-discovery.nse
+++ b/scripts/broadcast-pim-discovery.nse
@@ -79,7 +79,7 @@ local helloQuery = function(interface, dstip)
   local srcip = interface.address
 
   local hello_raw = helloRaw()
-  local ip_raw = bin.pack("H", "45c00040ed780000016718bc0a00c8750a00c86b") .. hello_raw
+  local ip_raw = stdnse.fromhex( "45c00040ed780000016718bc0a00c8750a00c86b") .. hello_raw
   hello_packet = packet.Packet:new(ip_raw, ip_raw:len())
   hello_packet:ip_set_bin_src(ipOps.ip_to_str(srcip))
   hello_packet:ip_set_bin_dst(ipOps.ip_to_str(dstip))
diff --git a/scripts/dns-nsec3-enum.nse b/scripts/dns-nsec3-enum.nse
index c1359020f..a0e4d2b83 100644
--- a/scripts/dns-nsec3-enum.nse
+++ b/scripts/dns-nsec3-enum.nse
@@ -175,7 +175,7 @@ local function generate_hash(domain, iter, salt)
   for word in string.gmatch(random_domain, "[^%.]+") do
     packed_domain[#packed_domain+1] = bin.pack("p", word)
   end
-  salt = bin.pack("H", salt)
+  salt = stdnse.fromhex( salt)
   local to_hash = bin.pack("AxA", table.concat(packed_domain), salt)
   iter = iter - 1
   local hash = openssl.sha1(to_hash)
diff --git a/scripts/enip-info.nse b/scripts/enip-info.nse
index d483bb248..7a5c6fc2d 100644
--- a/scripts/enip-info.nse
+++ b/scripts/enip-info.nse
@@ -1371,7 +1371,7 @@ end
 -- @param port port that was scanned via nmap
 action = function(host,port)
   -- pack the request identity packet (0x63)
-  local enip_req_ident = bin.pack("H","63000000000000000000000000000000c1debed100000000")
+  local enip_req_ident = stdnse.fromhex("63000000000000000000000000000000c1debed100000000")
   -- create table for output
   local output = stdnse.output_table()
   -- create local vars for socket handling
diff --git a/scripts/firewalk.nse b/scripts/firewalk.nse
index 537f98879..098022b9a 100644
--- a/scripts/firewalk.nse
+++ b/scripts/firewalk.nse
@@ -205,7 +205,7 @@ local tcp_funcs_v4 = {
   -- @param ttl the IP time to live
   -- @return the newly crafted IP packet
   getprobe = function(host, dport, ttl)
-    local pktbin = bin.pack("H",
+    local pktbin = stdnse.fromhex(
       "4500 0014 0000 4000 8000 0000 0000 0000 0000 0000" ..
       "0000 0000 0000 0000 0000 0000 6002 0c00 0000 0000 0204 05b4"
     )
@@ -269,7 +269,7 @@ local udp_funcs_v4 = {
   -- @param ttl the IP time to live
   -- @return the newly crafted IP packet
   getprobe = function(host, dport, ttl)
-    local pktbin = bin.pack("H",
+    local pktbin = stdnse.fromhex(
       "4500 0014 0000 4000 8000 0000 0000 0000 0000 0000" ..
       "0000 0000 0800 0000"
     )
@@ -332,7 +332,7 @@ local tcp_funcs_v6 = {
   -- @param ttl the IP time to live
   -- @return the newly crafted IP packet
   getprobe = function(host, dport, ttl)
-    local pktbin = bin.pack("H",
+    local pktbin = stdnse.fromhex(
       "4500 0014 0000 4000 8000 0000 0000 0000 0000 0000" ..
       "0000 0000 0000 0000 0000 0000 6002 0c00 0000 0000 0204 05b4"
     )
@@ -394,7 +394,7 @@ local udp_funcs_v6 = {
   -- @param ttl the IP time to live
   -- @return the newly crafted IP packet
   getprobe = function(host, dport, ttl)
-    local pktbin = bin.pack("H",
+    local pktbin = stdnse.fromhex(
       "4500 0014 0000 4000 8000 0000 0000 0000 0000 0000" ..
       "0000 0000 0800 0000"
     )
diff --git a/scripts/ipidseq.nse b/scripts/ipidseq.nse
index 8c9720410..d0040985f 100644
--- a/scripts/ipidseq.nse
+++ b/scripts/ipidseq.nse
@@ -62,7 +62,7 @@ end
 -- @param port Port number
 -- @return TCP Packet object
 local genericpkt = function(host, port)
-  local pkt = bin.pack("H",
+  local pkt = stdnse.fromhex(
   "4500 002c 55d1 0000 8006 0000 0000 0000" ..
   "0000 0000 0000 0000 0000 0000 0000 0000" ..
   "6002 0c00 0000 0000 0204 05b4"
diff --git a/scripts/krb5-enum-users.nse b/scripts/krb5-enum-users.nse
index 2b2bb42e9..e5d38035d 100644
--- a/scripts/krb5-enum-users.nse
+++ b/scripts/krb5-enum-users.nse
@@ -174,7 +174,7 @@ KRB5 = {
     princ = encoder:encode( name_type ) .. princ
 
     -- not sure about how this works, but apparently it does
-    princ = bin.pack("H", "A003") .. princ
+    princ = stdnse.fromhex( "A003") .. princ
     princ = self:encodeSequence(encoder,0x30, princ)
 
     return princ
@@ -234,7 +234,7 @@ KRB5 = {
     data = '\0' .. data
 
     -- hmm, wonder what this is
-    data = bin.pack("H", "A0070305") .. data
+    data = stdnse.fromhex( "A0070305") .. data
     data = self:encodeSequence(encoder, 0x30, data)
     data = self:encodeSequence(encoder, 0xA4, data)
     data = self:encodeSequence(encoder, 0xA2, encoder:encode(KRB5.MessageType['AS-REQ'])) .. data
diff --git a/scripts/ldap-novell-getpass.nse b/scripts/ldap-novell-getpass.nse
index ff8024301..a8dfd7efc 100644
--- a/scripts/ldap-novell-getpass.nse
+++ b/scripts/ldap-novell-getpass.nse
@@ -74,7 +74,7 @@ function action(host,port)
 
   -- In order to discover what protocol to use (SSL/TCP) we need to send a
   -- few bytes to the server. An anonymous bind should do it
-  local anon_bind = bin.pack("H", "300c020101600702010304008000" )
+  local anon_bind = stdnse.fromhex( "300c020101600702010304008000" )
   local socket, _, opt = comm.tryssl( host, port, anon_bind, nil )
   if ( not(socket) ) then
     return fail("Failed to connect to LDAP server")
@@ -98,13 +98,13 @@ function action(host,port)
   -- The following section could do with more documentation
   -- It's based on packet dumps from the getpass utility available from Novell Cool Solutions
   -- encode the account name as a sequence
-  data = ldap.encode( { _ldaptype = '30', bin.pack("H", "020101") .. data } )
+  data = ldap.encode( { _ldaptype = '30', stdnse.fromhex( "020101") .. data } )
   data = ldap.encode( { _ldaptype = '81', data } )
   data = ldap.encode( { _ldaptype = '80', NMASLDAP_GET_PASSWORD_REQUEST } ) .. data
   data = ldap.encode( { _ldaptype = '77', data } )
 
   -- encode the whole extended request as a sequence
-  data = ldap.encode( { _ldaptype = '30', bin.pack("H", "020102") .. data } )
+  data = ldap.encode( { _ldaptype = '30', stdnse.fromhex( "020102") .. data } )
 
   status = socket:send(data)
   if ( not(status) ) then return fail("Failed to send request") end
diff --git a/scripts/maxdb-info.nse b/scripts/maxdb-info.nse
index 72f5d6c86..fb758a472 100644
--- a/scripts/maxdb-info.nse
+++ b/scripts/maxdb-info.nse
@@ -139,12 +139,12 @@ action = function(host, port)
   local status, err = socket:connect(host, port)
   local data
 
-  status, data = exchPacket(socket, bin.pack("H", handshake))
+  status, data = exchPacket(socket, stdnse.fromhex( handshake))
   if ( not(status) ) then
     return fail("Failed to perform handshake with MaxDB server")
   end
 
-  status, data = exchPacket(socket, bin.pack("H", dbm_version))
+  status, data = exchPacket(socket, stdnse.fromhex( dbm_version))
   if ( not(status) ) then
     return fail("Failed to request version information from server")
   end
@@ -159,7 +159,7 @@ action = function(host, port)
     table.insert(result, ("%s: %s"):format(f, version_info[f:upper()]))
   end
 
-  status, data = exchCommand(socket, bin.pack("H", db_enum))
+  status, data = exchCommand(socket, stdnse.fromhex( db_enum))
   socket:close()
   if ( not(status) ) then
     return fail("Failed to request version information from server")
diff --git a/scripts/mikrotik-routeros-brute.nse b/scripts/mikrotik-routeros-brute.nse
index 656ef2373..6bda8050b 100644
--- a/scripts/mikrotik-routeros-brute.nse
+++ b/scripts/mikrotik-routeros-brute.nse
@@ -67,7 +67,7 @@ Driver =
     --If we find the challenge value we continue the connection process
     if ret then
         stdnse.debug1("Challenge value found:%s", ret)
-        local md5str = bin.pack("xAA", password, bin.pack("H", ret)) --appends pwd and challenge
+        local md5str = bin.pack("xAA", password, stdnse.fromhex( ret)) --appends pwd and challenge
         local chksum = stdnse.tohex(openssl.md5(md5str))
         local user_l = username:len()+6 --we add six because of the string "=name="
         local login_pkt = bin.pack("cAcAcAx", 0x6, "/login", user_l, "=name="..username, 0x2c, "=response=00"..chksum)
diff --git a/scripts/mrinfo.nse b/scripts/mrinfo.nse
index 0c64a6716..6a9cd94a7 100644
--- a/scripts/mrinfo.nse
+++ b/scripts/mrinfo.nse
@@ -189,7 +189,7 @@ local mrinfoQuery = function(interface, dstip)
   local srcip = interface.address
 
   local mrinfo_raw = mrinfoRaw()
-  local ip_raw = bin.pack("H", "45c00040ed780000400218bc0a00c8750a00c86b") .. mrinfo_raw
+  local ip_raw = stdnse.fromhex( "45c00040ed780000400218bc0a00c8750a00c86b") .. mrinfo_raw
   mrinfo_packet = packet.Packet:new(ip_raw, ip_raw:len())
   mrinfo_packet:ip_set_bin_src(ipOps.ip_to_str(srcip))
   mrinfo_packet:ip_set_bin_dst(ipOps.ip_to_str(dstip))
diff --git a/scripts/mtrace.nse b/scripts/mtrace.nse
index 9cafbe1a5..496ff1706 100644
--- a/scripts/mtrace.nse
+++ b/scripts/mtrace.nse
@@ -141,7 +141,7 @@ end
 --@param destination Target host to which the packet is sent.
 --@param trace_raw Traceroute raw Query.
 local traceSend = function(interface, destination, trace_raw)
-  local ip_raw = bin.pack("H", "45c00040ed780000400218bc0a00c8750a00c86b") .. trace_raw
+  local ip_raw = stdnse.fromhex( "45c00040ed780000400218bc0a00c8750a00c86b") .. trace_raw
   local trace_packet = packet.Packet:new(ip_raw, ip_raw:len())
   trace_packet:ip_set_bin_src(ipOps.ip_to_str(interface.address))
   trace_packet:ip_set_bin_dst(ipOps.ip_to_str(destination))
diff --git a/scripts/mysql-enum.nse b/scripts/mysql-enum.nse
index d8cd6a02f..7e73b1913 100644
--- a/scripts/mysql-enum.nse
+++ b/scripts/mysql-enum.nse
@@ -78,7 +78,7 @@ Driver = {
       return false,brute.Error:new(response)
     end
     stdnse.debug1( "Trying %s ...", pass)
-    local auth_string = bin.pack("H","0000018d00000000") .. pass .. bin.pack("H","00504e5f5155454d4500"); -- old authentication method
+    local auth_string = stdnse.fromhex("0000018d00000000") .. pass .. stdnse.fromhex("00504e5f5155454d4500"); -- old authentication method
     local err
     status, err = self.socket:send(bin.pack("c",string.len(auth_string)-3) .. auth_string) --send initial auth
     status, response = self.socket:receive_bytes(0)
diff --git a/scripts/omron-info.nse b/scripts/omron-info.nse
index 33ba241e2..8b94278e6 100644
--- a/scripts/omron-info.nse
+++ b/scripts/omron-info.nse
@@ -88,7 +88,7 @@ end
 --
 -- @param socket Socket that is passed in from Action
 function send_udp(socket)
-  local controller_data_read = bin.pack("H", "800002000000006300ef050100")
+  local controller_data_read = stdnse.fromhex( "800002000000006300ef050100")
   -- send Request Information Packet
   socket:send(controller_data_read)
   local rcvstatus, response = socket:receive()
@@ -101,7 +101,7 @@ end
 -- @param socket Socket that is passed in from Action
 function send_tcp(socket)
   -- this is the request address command
-  local req_addr = bin.pack("H", "46494e530000000c000000000000000000000000")
+  local req_addr = stdnse.fromhex( "46494e530000000c000000000000000000000000")
   -- TCP requires a network address that is revived from the first request,
   -- The read controller data these two strings will be joined with the address
   local controller_data_read = "46494e5300000015000000020000000080000200"
diff --git a/scripts/path-mtu.nse b/scripts/path-mtu.nse
index f64c9aff9..28d322d02 100644
--- a/scripts/path-mtu.nse
+++ b/scripts/path-mtu.nse
@@ -183,13 +183,13 @@ local setmtu = function(pkt, mtu)
 end
 
 local basepkt = function(proto)
-  local ibin = bin.pack("H",
+  local ibin = stdnse.fromhex(
     "4500 0014 0000 4000 8000 0000 0000 0000 0000 0000"
   )
-  local tbin = bin.pack("H",
+  local tbin = stdnse.fromhex(
     "0000 0000 0000 0000 0000 0000 6002 0c00 0000 0000 0204 05b4"
   )
-  local ubin = bin.pack("H",
+  local ubin = stdnse.fromhex(
     "0000 0000 0800 0000"
   )
 
diff --git a/scripts/pcanywhere-brute.nse b/scripts/pcanywhere-brute.nse
index 11688936f..3c737287f 100644
--- a/scripts/pcanywhere-brute.nse
+++ b/scripts/pcanywhere-brute.nse
@@ -85,7 +85,7 @@ Driver = {
       if(not(status)) then
         return false, brute.Error:new( "Couldn't connect to host: " .. err )
       end
-      status, err = self.socket:send(bin.pack("H","00000000")) --initial hello
+      status, err = self.socket:send(stdnse.fromhex("00000000")) --initial hello
       status, response = self.socket:receive_bytes(0)
       if not status and not retry then
         break
@@ -99,13 +99,13 @@ Driver = {
       return false, brute.Error:new( "Probably not pcAnywhere." )
     end
     retry = false
-    status, err = self.socket:send(bin.pack("H","6f06ff")) -- downgrade into legacy mode
+    status, err = self.socket:send(stdnse.fromhex("6f06ff")) -- downgrade into legacy mode
     status, response = self.socket:receive_bytes(0)
 
-    status, err = self.socket:send(bin.pack("H","6f61000900fe0000ffff00000000")) -- auth capabilities I
+    status, err = self.socket:send(stdnse.fromhex("6f61000900fe0000ffff00000000")) -- auth capabilities I
     status, response = self.socket:receive_bytes(0)
 
-    status, err = self.socket:send(bin.pack("H","6f620102000000")) -- auth capabilities II
+    status, err = self.socket:send(stdnse.fromhex("6f620102000000")) -- auth capabilities II
     status, response = self.socket:receive_bytes(0)
     if not status or (string.find(response,"Enter user name") == nil and string.find(response,"Enter login name") == nil) then
       stdnse.debug1("handshake failed")
diff --git a/scripts/qscan.nse b/scripts/qscan.nse
index fe278e9e0..5f857a6ef 100644
--- a/scripts/qscan.nse
+++ b/scripts/qscan.nse
@@ -196,7 +196,7 @@ end
 -- @param host Host object
 -- @return TCP Packet object
 local genericpkt = function(host)
-  local pkt = bin.pack("H",
+  local pkt = stdnse.fromhex(
   "4500 002c 55d1 0000 8006 0000 0000 0000" ..
   "0000 0000 0000 0000 0000 0000 0000 0000" ..
   "6002 0c00 0000 0000 0204 05b4"
diff --git a/scripts/rdp-vuln-ms12-020.nse b/scripts/rdp-vuln-ms12-020.nse
index 464011cac..c154a79f5 100644
--- a/scripts/rdp-vuln-ms12-020.nse
+++ b/scripts/rdp-vuln-ms12-020.nse
@@ -83,7 +83,7 @@ action = function(host, port)
   .. "0000" -- dst reference
   .. "0000" -- src reference
   .. "00" -- class and options
-  local connectionRequest = bin.pack("H",connectionRequestStr)
+  local connectionRequest = stdnse.fromhex(connectionRequestStr)
 
   -- see http://msdn.microsoft.com/en-us/library/cc240836%28v=prot.10%29.aspx
   local connectInitialStr = "03000065" -- TPKT Header
@@ -120,14 +120,14 @@ action = function(host, port)
   .. "0202ffff" -- maxMCSPDUSize
   .. "020102" -- protocolVersion
   .. "0400" -- userData
-  local connectInitial = bin.pack("H",connectInitialStr)
+  local connectInitial = stdnse.fromhex(connectInitialStr)
 
   -- see http://msdn.microsoft.com/en-us/library/cc240835%28v=prot.10%29.aspx
   local userRequestStr = "0300" -- header
   .. "0008" -- length
   .. "02f080" -- X.224 Data TPDU (2 bytes: 0xf0 = Data TPDU, 0x80 = EOT, end of transmission)
   .. "28" -- PER encoded PDU contents
-  local userRequest = bin.pack("H",userRequestStr)
+  local userRequest = stdnse.fromhex(userRequestStr)
 
   local user1,user2
   local pos
@@ -184,7 +184,7 @@ action = function(host, port)
   status, err = socket:send(connectionRequest)
 
   status, response = socket:receive_bytes(0)
-  if response ~= bin.pack("H","0300000b06d00000123400") then
+  if response ~= stdnse.fromhex("0300000b06d00000123400") then
     --probably not rdp at all
     stdnse.debug1("not RDP")
     return nil
@@ -199,11 +199,11 @@ action = function(host, port)
   pos,user2 = bin.unpack(">S",response:sub(10,11)) -- second user's channel - 1001
   user2 = user2+1001 -- second user's channel
   local data4 = bin.pack(">SS",user1,user2)
-  local data5 = bin.pack("H","0300000c02f08038") -- channel join request TPDU
+  local data5 = stdnse.fromhex("0300000c02f08038") -- channel join request TPDU
   local channelJoinRequest = data5 .. data4
   status, err = socket:send(channelJoinRequest) -- bogus channel join request user1 requests channel of user2
   status, response = socket:receive_bytes(0)
-  if response:sub(8,9) == bin.pack("H","3e00") then
+  if response:sub(8,9) == stdnse.fromhex("3e00") then
     -- 3e00 indicates a successful join
     -- see http://msdn.microsoft.com/en-us/library/cc240911%28v=prot.10%29.aspx
     -- service is vulnerable
diff --git a/scripts/rmi-vuln-classloader.nse b/scripts/rmi-vuln-classloader.nse
index 17aa667a7..3a737cde9 100644
--- a/scripts/rmi-vuln-classloader.nse
+++ b/scripts/rmi-vuln-classloader.nse
@@ -2,6 +2,7 @@ local bin = require "bin"
 local rmi = require "rmi"
 local shortport = require "shortport"
 local string = require "string"
+local stdnse = require "stdnse"
 local vulns = require "vulns"
 
 description = [[
@@ -90,7 +91,7 @@ Default configuration of RMI registry allows loading classes from remote URLs wh
   local report = vulns.Report:new(SCRIPT_NAME, host, port);
   rmi_vuln.state = vulns.STATE.NOT_VULN;
 
-  rmiArgs:addRaw(bin.pack("H", argsRaw));
+  rmiArgs:addRaw(stdnse.fromhex( argsRaw));
 
   -- reference: java/rmi/dgc/DGCImpl_Stub.java and java/rmi/dgc/DGCImpl_Skel.java
   -- we are calling DGC's (its objectId is 2) method with opnum 0
diff --git a/scripts/s7-info.nse b/scripts/s7-info.nse
index b563ff440..10eec00a1 100644
--- a/scripts/s7-info.nse
+++ b/scripts/s7-info.nse
@@ -184,17 +184,17 @@ end
 -- @param port port that was scanned via nmap
 action = function(host, port)
   -- COTP packet with a dst of 102
-local COTP = bin.pack("H", "0300001611e00000001400c1020100c2020" .. "102" .. "c0010a")
+local COTP = stdnse.fromhex( "0300001611e00000001400c1020100c2020" .. "102" .. "c0010a")
   -- COTP packet with a dst of 200
-  local alt_COTP = bin.pack("H", "0300001611e00000000500c1020100c2020" .. "200" .. "c0010a")
+  local alt_COTP = stdnse.fromhex( "0300001611e00000000500c1020100c2020" .. "200" .. "c0010a")
   -- setup the ROSCTR Packet
-  local ROSCTR_Setup = bin.pack("H", "0300001902f08032010000000000080000f0000001000101e0")
+  local ROSCTR_Setup = stdnse.fromhex( "0300001902f08032010000000000080000f0000001000101e0")
   -- setup the Read SZL information packet
-  local Read_SZL = bin.pack("H", "0300002102f080320700000000000800080001120411440100ff09000400110001")
+  local Read_SZL = stdnse.fromhex( "0300002102f080320700000000000800080001120411440100ff09000400110001")
   -- setup the first SZL request (gather the basic hardware and version number)
-  local first_SZL_Request = bin.pack("H", "0300002102f080320700000000000800080001120411440100ff09000400110001")
+  local first_SZL_Request = stdnse.fromhex( "0300002102f080320700000000000800080001120411440100ff09000400110001")
   -- setup the second SZL request
-  local second_SZL_Request = bin.pack("H", "0300002102f080320700000000000800080001120411440100ff090004001c0001")
+  local second_SZL_Request = stdnse.fromhex( "0300002102f080320700000000000800080001120411440100ff090004001c0001")
   -- response is used to collect the packet responses
   local response
   -- output table for Nmap
diff --git a/scripts/smb-vuln-ms10-054.nse b/scripts/smb-vuln-ms10-054.nse
index 9c6b7efed..dbbfb2686 100644
--- a/scripts/smb-vuln-ms10-054.nse
+++ b/scripts/smb-vuln-ms10-054.nse
@@ -133,7 +133,7 @@ to execute arbitrary code via a crafted SMB packet, aka "SMB Pool Overflow Vulne
   local status, smbstate = smb.start_ex(host, true, true, share, nil, nil, nil)
 
   local param = "0501" -- Query FS Attribute Info
-  local status, result = send_transaction2(smbstate,0x03,bin.pack("H",param))
+  local status, result = send_transaction2(smbstate,0x03,stdnse.fromhex(param))
   status, result = smb.smb_read(smbstate,true) -- see if we can still talk to the victim
   if not status then -- if not , it has crashed
     ms10_054.state = vulns.STATE.VULN
diff --git a/scripts/telnet-encryption.nse b/scripts/telnet-encryption.nse
index 8173a0feb..d89a7f279 100644
--- a/scripts/telnet-encryption.nse
+++ b/scripts/telnet-encryption.nse
@@ -77,7 +77,7 @@ action = function(host, port)
 
   local socket = nmap.new_socket()
   local status = socket:connect(host, port)
-  local data = bin.pack("H", "FFFD26FFFB26")
+  local data = stdnse.fromhex( "FFFD26FFFB26")
   local result
 
   socket:set_timeout(7500)