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62 lines
1.2 KiB
Lua
62 lines
1.2 KiB
Lua
id="SSH Protocol Version 1"
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description="Checks to see if SSH server supports SSH Protocol Version 1."
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author = "Brandon Enright <bmenrigh@ucsd.edu>"
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license = "See nmaps COPYING for licence"
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categories = {"intrusive"}
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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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