SSH login Log parsing script (Python)

Haven't updated the blog for a long time, wrote an early script to save the file, a script for analyzing user login log/etc/auth.log, can analyze

The number of successes, failures, and user names from the IP address and login failures can be used to monitor for brute force attacks and can be used to collect dictionaries to avoid the problem of too simple passwords

#/usr/bin/env python3.4#anyalize the/etc/auth.log files to get# 1) What many failed login trials# 2) How many Succeede D Login trials# 3) How many IP's where the login trials comes from and what they are# 4) How many invalid usernames ar E tested and what they are## usage:# anyalyze <filename># Note:-to standard input streamimport Sysimpor    T re# # of Trialsdebug_flag = 0info_flag = 0def Debug (msg): If Debug_flag:print ("[Debug]", MSG) def info (msg):    If Info_flag:print ("[INFO]", msg) def openlog (source): if (Source = = "-"): Return Sys.stdin; Else:debug ("Opening file:" + source) F = open (source, ' R ') return F # failed loginptnfailed = Re.compi Le (R ' Failed password for (? p<user>\w+) from (? p<ip>\d+\.\d+\.\d+\.\d+) ' # Invalid user Trailptninvalid = Re.compile (R ' Failed password for invalid user (? p<user>\w+) from (? p<ip>\d+\.\d+\.\d+\.\d+) ' # Login succeededptnsuccess = re.compile (R ' AcceptEd Password for (? p<user>\w+) from (? p<ip>\d+\.\d+\.\d+\.\d+) ' # Sudoptnsudo = Re.compile (R ' session opened for user (? p<user>\w+) by (? p<ip>\w+) ' # >0:valid user & Incorreck password# <0:invalid usernfailed = {}nsuccess = {}nSuccess_record    s = {}ipfailed={}ipsuccess={}if (len (SYS.ARGV) < 2): Print ("Usage:") print ("\ t" +sys.argv[0]+ "<filename>")    Print ("Note: <filename> can be-for standard input stream") exit (0) log = Openlog (sys.argv[1]) for line in log:        m = Ptnfailed.search (line) debug (m) if not m:m = Ptninvalid.search (line) debug (m) if M: user = M.group (ptninvalid.groupindex[' user ']) if user not in Nfailed:info ("[FAILED] Found a new user &            lt; "+ user +" > ");  Nfailed[user] = 0 Nfailed[user] = nfailed[user]+1 IP = m.group (ptninvalid.groupindex[' IP ')) if IP not In Ipfailed:ipfailed[ip] = 0 info ("[FAILED] Found a new IP < "+ IP +" > "); IPFAILED[IP] = Ipfailed[ip] + 1 else:m = Ptnsuccess.search (line) if not m:m = Ptnsudo.search            (line) debug (M) if M:print (line) user = M.group (ptnsuccess.groupindex[' user ') If user not in Nsuccess:nsuccess[user] = 0 info ("[SUCCESS] Found a new user <" + u            Ser + ">");                Nsuccess[user] = nsuccess[user]+1 IP = m.group (ptnsuccess.groupindex[' IP ')) if IP not in ipsuccess:            IPSUCCESS[IP] = 0 info ("[SUCCESS] Found a new IP <" + IP + ">"); IPSUCCESS[IP] = Ipsuccess[ip] + 1 else:debug ("* * * Unknown:" + line) # todo:close (log) print ("nfailed  : ") print (nfailed) print (" nsuccess: ") print (nsuccess) # Key-value list# It assure that the order was the same to the coming Orderclass keyvalue:def __init__ (self, Key, value): Self.key = key Self.value =Value def __repr__ (self): return repr ((Self.key, Self.value)) # Return a KeyValue list because of the order of th  e keys in a dictionary# was unexpected, not same to the order as they be put indef sortdict (adict): result=[] keys =    Sorted (Adict.keys (), key=adict.__getitem__, reverse = True) for k in Keys:result.append (KeyValue (k,adict[k)))    Return result# convert a KeyValue list to HTML table# @return a HTML stringdef keyvaluelist2html (kvlist, Headermap):        html = "<table>\n" hkey = ' key ' Hvalue = ' Value ' If Headermap:hkey = headermap[' key '];        Hvalue = headermap[' value '];  Debug (hkey) Debug (hvalue) html+= "<th>" + "<td>" +hkey+ ' </td> ' + ' <td> ' +hvalue+ ' </td> ' + ' </th>\n ' for kv in kvlist:html + = "<tr>" + "<td>" +kv.key+ ' </td> ' + ' <td> ' +str (Kv.va Lue) + ' </td> ' + ' </tr>\n ' html + = "</table>\n" Return Htmlprint ("------------tested userList *failed*-------------", Sortdict (nfailed)) print ("------------Source IP *failed*------------------", Sortdict ( ipfailed) Print ("------------Login Success-------------", Sortdict (nsuccess)) print ("------------Source IP *success *-----------------", sortdict (ipsuccess)) # Writing result to a HTML reportprint (" wring result to result.html ... ") reportf Ilename = ' auth.log-analysis.html ' report = open (Reportfilename, ' W ') if Report:title = ' auth log analysis ' REPORT.WR                 Ite (' 

SSH login Log parsing script (Python)