1    package security; 
2     
3    import java.io.BufferedReader; 
4    import java.io.BufferedWriter; 
5    import java.io.IOException; 
6     
7     
8     
9    /** 
10    * DocJava, Inc. User: lyon Date: Aug 3, 2004 
11    * Time: 10:07:24 AM 
12    */ 
13   public class CertUtils { 
14    
15    
16       public final static int LINE_LENGTH = 76; 
17       public final static String START = "BEGIN PKCS"; 
18       public final static String END = "END PKCS"; 
19    
20       public static void main(String[] args) 
21               throws IOException { 
22    
23           cleanThawtes(); 
24           System.out.println("done!"); 
25    
26       } 
27    
28       public static void cleanThawtes() 
29               throws IOException { 
30           BufferedReader r = new BufferedReader( 
31                   futils.Futil.getFileReader( 
32                   "select a Thawte file")); 
33           BufferedWriter w = new BufferedWriter( 
34                   futils.WriterUtil.getFileWriter( 
35                   "enter output file")); 
36           String line; 
37           line = scanUntilStart(r); 
38           w.write(line); 
39           w.newLine(); 
40           int outIndex = 0; 
41           while ((line = r.readLine()) != null) { 
42               if (line.indexOf(END) != -1) { 
43                   if (outIndex != 0) 
44                       w.newLine(); 
45                   w.write(line); 
46                   break; 
47               } 
48               outIndex = 
49               packOutputTo76Chars(line, 
50                                   w, 
51                                   outIndex); 
52           } 
53           w.close(); 
54           r.close(); 
55       } 
56    
57       private static int packOutputTo76Chars( 
58               String line, 
59               BufferedWriter w, 
60               int outIndex) throws IOException { 
61           int inIndex; 
62           inIndex = 0; 
63           while (inIndex < line.length()) { 
64               w.write(line.charAt(inIndex)); 
65               outIndex++; 
66               if (outIndex == LINE_LENGTH) { 
67                   w.newLine(); 
68                   outIndex = 0; 
69               } 
70               inIndex++; 
71           } 
72           return outIndex; 
73       } 
74       /** 
75        * Scan the buffered reader until the 
76        * start keyword is found. 
77        * @param r 
78        * @return 
79        * @throws IOException 
80        */ 
81       private static String scanUntilStart( 
82               BufferedReader r) throws IOException { 
83           String line; 
84           while ((line = r.readLine()).indexOf( 
85                   START) == 
86                  -1) 
87               ; 
88           return line; 
89       } 
90    
91   } 
92