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1
3 package org.jgroups.demos;
4
5 import java.io.FileOutputStream  ;
6 import java.io.OutputStream ;
7 import java.security.KeyStore ;
8
9 import javax.crypto.KeyGenerator;
10 import javax.crypto.SecretKey;
11
12
31 public class KeyStoreGenerator {
32
33 static String symAlg = "Blowfish";
34 static int keySize =56;
35 static String keyStoreName = "defaultStore.keystore";
36 static String storePass = "changeit";
37 static String alias = "myKey";
38
39 public static void main(String [] args)
40 {
41
42 int i = 0, j;
43 String arg =null;;
44 boolean specified =false;
45
46 while (i < args.length && args[i].startsWith("-")) {
47 arg = args[i++];
48 System.out.println("Found arg of " + arg);
49 if (arg.equalsIgnoreCase("--alg")){
50 if (i<args.length){
51 symAlg = args[i++];
52 }else{
53 System.out.println("No Algorithm supplied using default of "+ symAlg);
54 }
55 }
56 else if (arg.equalsIgnoreCase("--size")){
57 if (i<args.length){
58 keySize = Integer.parseInt(args[i++]);
59 }else{
60 System.out.println("No Size supplied using default of "+keySize);
61 }
62 }else if (arg.equalsIgnoreCase("--storeName")){
63
64 if (i<args.length){
65 String temp = args[i++];
66 keyStoreName = temp;
67 }else{
68 System.out.println("No keystore supplied using default of "+keyStoreName);
69 }
70 }
71 else if (arg.equalsIgnoreCase("--storePass")){
72 if (i<args.length){
73 storePass = args[i++];
74 }else{
75 System.out.println("No password supplied using default of "+storePass);
76 }
77 }
78 else if (arg.equalsIgnoreCase("--alias")){
79 if (i<args.length){
80 alias = args[i++];
81 }else{
82 System.out.println("No alias supplied using default of "+alias);
83 }
84 }
85 }
86 System.out.println("Creating file '" + keyStoreName +"' using Algorithm '"+
87 symAlg +"' size '"+keySize + "'");
88
89 OutputStream stream =null;
90 try {
91 stream= new FileOutputStream (keyStoreName);
92 SecretKey key = initSymKey();
93 KeyStore store = KeyStore.getInstance("JCEKS");
94 store.load(null,null);
95 store.setKeyEntry(alias,key,storePass.toCharArray(),null);
96 store.store(stream,storePass.toCharArray());
97
98 } catch (Exception e){
99 e.printStackTrace();
100 }
101 finally{
102 try {
103 stream.close();
104 } catch (Exception e){
105
106 }
107 }
108 System.out.println("Finished keystore creation");
109 }
110
111 public static SecretKey initSymKey() throws Exception
112 {
113 KeyGenerator keyGen = null;
114
116 keyGen = KeyGenerator.getInstance(getAlgorithm(symAlg));
117
118 keyGen.init(keySize);
119 SecretKey secretKey = keyGen.generateKey();
120
121 return secretKey;
122
123 }
124
125 private static String getAlgorithm(String s)
126 {
127 int index = s.indexOf("/");
128 if (index == -1)
129 return s;
130
131 return s.substring(0, index);
132 }
133 }
134 |
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