[32] | 1 | /** |
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| 2 | * Program: LogParser.java |
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| 3 | * Editor: Waue Chen |
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| 4 | * From : NCHC. Taiwn |
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| 5 | * Last Update Date: 07/17/2008 |
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| 6 | */ |
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| 7 | |
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| 8 | package tw.org.nchc.code; |
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| 9 | |
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| 10 | import java.io.BufferedReader; |
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| 11 | import java.io.BufferedWriter; |
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| 12 | import java.io.File; |
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| 13 | import java.io.FileReader; |
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| 14 | import java.io.FileWriter; |
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| 15 | import java.io.IOException; |
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| 16 | import java.text.ParseException; |
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| 17 | import java.util.StringTokenizer; |
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| 18 | import java.util.regex.Matcher; |
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| 19 | import java.util.regex.Pattern; |
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| 20 | |
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| 21 | public class SnortParser { |
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| 22 | private String logData = new String(); |
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| 23 | private BufferedReader fi ; |
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| 24 | private BufferedWriter fw ; |
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| 25 | public SnortParser(String in, String ou) throws IOException { |
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| 26 | fi = new BufferedReader(new FileReader(new File(in))); |
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| 27 | fw = new BufferedWriter(new FileWriter(new File(ou))); |
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| 28 | } |
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| 29 | |
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| 30 | public static boolean isIpAddress(String inputString) { |
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| 31 | StringTokenizer tokenizer = new StringTokenizer(inputString, "."); |
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| 32 | if (tokenizer.countTokens() != 4) { |
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| 33 | return false; |
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| 34 | } |
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| 35 | try { |
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| 36 | for (int i = 0; i < 4; i++) { |
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| 37 | String t = tokenizer.nextToken(); |
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| 38 | int chunk = Integer.parseInt(t); |
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| 39 | if ((chunk & 255) != chunk) { |
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| 40 | return false; |
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| 41 | } |
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| 42 | } |
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| 43 | } catch (NumberFormatException e) { |
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| 44 | return false; |
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| 45 | } |
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| 46 | if (inputString.indexOf("..") >= 0) { |
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| 47 | return false; |
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| 48 | } |
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| 49 | return true; |
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| 50 | } |
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| 51 | |
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| 52 | public void snortParser(String line, int i) throws ParseException, |
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| 53 | Exception { |
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| 54 | String[] data ; |
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| 55 | Pattern patten_line; |
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| 56 | Matcher matcher; |
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| 57 | switch (i) { |
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| 58 | case 1: |
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| 59 | patten_line = Pattern |
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| 60 | .compile("^\\[\\**\\] \\[([1-9]*):([1-9]*):([1-9]*)\\] ([^\\[]*)\\[\\**\\]$"); |
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| 61 | break; |
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| 62 | case 2: |
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| 63 | patten_line = Pattern |
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| 64 | .compile("^\\[Classification: ([^\\]]*)\\] \\[Priority: ([1-9]*)\\].*$"); |
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| 65 | break; |
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| 66 | case 3: |
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| 67 | patten_line = Pattern |
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| 68 | .compile("(^[0-9]*)\\/([0-9]*)\\-([0-9]*)\\:([0-9]*)\\:([0-9]*)\\.[0-9]* ([^ ]*) -> ([^$]*)$"); |
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| 69 | break; |
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| 70 | case 4: |
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| 71 | patten_line = Pattern |
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| 72 | .compile("^([^ ]*) TTL:([^ ]*) TOS:([^ ]*) ID:([^ ]*) IpLen:([^ ]*) DgmLen:([^ ]*)$"); |
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| 73 | break; |
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| 74 | default: |
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| 75 | patten_line = null; |
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| 76 | break; |
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| 77 | } |
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| 78 | matcher = patten_line.matcher(line); |
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| 79 | if (matcher.matches()) { |
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| 80 | int number = matcher.groupCount(); |
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| 81 | data = new String[number]; |
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| 82 | for (int j = 0; j < number; j++) { |
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| 83 | data[j] = matcher.group(j+1); |
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| 84 | this.logData += (data[j]+";"); |
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| 85 | } |
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| 86 | |
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| 87 | } |
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| 88 | |
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| 89 | } |
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| 90 | void parseToLine() throws IOException,ParseException,Exception { |
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| 91 | |
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| 92 | String line = null; |
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| 93 | int count = 0; |
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| 94 | |
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| 95 | do { |
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| 96 | String tmp = this.fi.readLine(); |
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| 97 | if (tmp == null) { |
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| 98 | break; |
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| 99 | }else if(count < 4){ |
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| 100 | line = tmp; |
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| 101 | // System.out.println(line); |
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| 102 | snortParser(line, count+1); |
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| 103 | count ++; |
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| 104 | }else if(count ==4 ){ |
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| 105 | count ++; |
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| 106 | }else if (count == 5){ |
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| 107 | this.fw.write(this.logData.toString() + "\n"); |
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| 108 | this.logData = "" ; |
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| 109 | count = 0; |
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| 110 | } |
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| 111 | else |
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| 112 | { |
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| 113 | System.err.print(" Error ! "); |
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| 114 | return ; |
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| 115 | } |
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| 116 | } while (true); |
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| 117 | this.fw.flush(); |
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| 118 | this.fw.close(); |
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| 119 | |
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| 120 | } |
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| 121 | public static void main(String[] args) throws ParseException, Exception { |
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| 122 | String in = new String("/home/waue/Desktop/alert"); |
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| 123 | String ou = new String("/home/waue/Desktop/bb"); |
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| 124 | SnortParser a = new SnortParser(in,ou); |
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| 125 | a.parseToLine(); |
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| 126 | } |
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| 127 | } |
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