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do not use try() in ssh1 and ssh2 library because a network error occurring in the library would otherwise stop the complete script

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sven
2008-10-16 11:05:52 +00:00
parent 0ec5373496
commit 1f726dd386
2 changed files with 27 additions and 15 deletions
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16
nselib/ssh1.lua
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@@ -19,18 +19,22 @@ local openssl = require "openssl"
--"fp_input", "full_key", "algorithm", and "fingerprint".
fetch_host_key = function(host, port)
local socket = nmap.new_socket()
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local status
try(socket:connect(host.ip, port.number))
status = socket:connect(host.ip, port.number)
if not status then return end
-- fetch banner
try(socket:receive_lines(1))
status = socket:receive_lines(1)
if not status then socket:close(); return end
-- send our banner
try(socket:send("SSH-1.5-Nmap-SSH1-Hostkey\r\n"))
status = socket:send("SSH-1.5-Nmap-SSH1-Hostkey\r\n")
if not status then socket:close(); return end
local data, packet_length, padding, offset
data = try(socket:receive())
status,data = socket:receive()
socket:close()
if not status then return end
offset, packet_length = bin.unpack( ">i", data )
padding = 8 - packet_length % 8
offset = offset + padding