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8bd71aaf43
I made every script follow a standard form: it starts with the id, followed by the description. The description is contained in [[ ]] delimiters. The description is in the global description variable, not in a LuaDoc comment. Other LuaDoc information such as @args and @usage follows the description in a comment. The first paragraph of each description is a a short summary of what the script does. More detailed information, if any, is given in following paragraphs. I also improved some wording and formatting in a few cases.
64 lines
1.2 KiB
Lua
64 lines
1.2 KiB
Lua
id = "SSH Protocol Version 1"
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description = [[
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Checks if an SSH server supports SSH Protocol Version 1.
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]]
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author = "Brandon Enright <bmenrigh@ucsd.edu>"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"default", "safe"}
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require "shortport"
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portrule = shortport.port_or_service(22, "ssh")
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action = function(host, port)
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local socket = nmap.new_socket()
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local result;
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local status = true;
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socket:connect(host.ip, port.number, port.protocol)
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status, result = socket:receive_lines(1);
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if (not status) then
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socket:close()
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return
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end
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if (result == "TIMEOUT") then
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socket:close()
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return
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end
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if not string.match(result, "^SSH%-.+\n$") then
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socket:close()
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return
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end
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socket:send("SSH-1.5-NmapNSE_1.0\n")
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-- should be able to consume at least 13 bytes
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-- key length is a 4 byte integer
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-- padding is between 1 and 8 bytes
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-- type is one byte
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-- key is at least several bytes
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status, result = socket:receive_bytes(13);
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if (not status) then
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socket:close()
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return
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end
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if (result == "TIMEOUT") then
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socket:close()
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return
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end
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if not string.match(result, "^....[%z]+\002") then
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socket:close()
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return
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end
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socket:close();
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return "Server supports SSHv1"
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end
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