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Java > Open Source Codes > com > jcorporate > expresso > core > misc > CookieUtil


1 /* ====================================================================
2  * The Jcorporate Apache Style Software License, Version 1.2 05-07-2002
3  *
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20  * "This product includes software developed by Jcorporate Ltd.
21  * (http://www.jcorporate.com/)."
22  * Alternately, this acknowledgment may appear in the software itself,
23  * if and wherever such third-party acknowledgments normally appear.
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60  *
61  * Portions of this software are based upon other open source
62  * products and are subject to their respective licenses.
63  */
64
65 package com.jcorporate.expresso.core.misc;
66
67 /**
68  * CookieUtil.java
69  *
70  * Copyright 2000, 2001 Jcorporate Ltd.
71  */
72
73 import com.jcorporate.expresso.core.security.CryptoManager;
74 import com.jcorporate.expresso.kernel.exception.ChainedException;
75
76
77 /**
78  * A utility class for encoding and decoding cookies before sending them
79  * to the browser
80  *
81  * @author Michael Rimov
82  * @since Expresso 3.0
83  */
84 public class CookieUtil {
85
86     public CookieUtil() {
87     }
88
89     /**
90      * cookieDecode - given a string, encrypt it to block plaintext snooping
91      * traffic to catch user ids and passwords.
92      *
93      * @param data The data to decrypt.
94      * @return String the decoded string or &quot;&quot; if it doesn't decode.
95      * @throws Exception if there are problems with loading the crypto routines
96      */
97     static public String JavaDoc cookieDecode(String JavaDoc data)
98             throws Exception JavaDoc {
99         try {
100             if (data == null || data.length() == 0 || data.equals("NONE")) {
101                 return ("");
102             }
103
104             return CryptoManager.getInstance().getStringEncryption().decryptString(
105                     CookieBase64.decodeNoPadding(URLUTF8Encoder.decode(data)));
106
107         } catch (com.jcorporate.expresso.kernel.exception.ChainedException ex) {
108             return "";
109         } catch (IllegalArgumentException JavaDoc ex) {
110
111             //Cookie was bad
112 return ("");
113         } catch (IllegalStateException JavaDoc ise) {
114             return ("");
115         }
116     } /* cookieDecode(String) */
117
118
119     /**
120      * cookieEncode - given a string, encrypt it to block plaintext snooping
121      * traffic to catch user ids and passwords. Also Base64 Encodes the
122      * ciphertext so that the result is standard Ascii string handling.
123      *
124      * @param data The data to encrypt.
125      * @return String the encode string or &quot;&quot; if it doesn't encode.
126      * @throws ChainedException if there are problems with loading the crypto routines
127      */
128     static public String JavaDoc cookieEncode(String JavaDoc data)
129             throws ChainedException {
130         if (data == null || data.length() == 0) {
131             return ("");
132         }
133         try {
134             return URLUTF8Encoder.encode(CookieBase64.encodeNoPadding(CryptoManager.getInstance().getStringEncryption().encryptString(
135                     data)));
136         } catch (IllegalArgumentException JavaDoc ex) {
137             return ("");
138         } catch (IllegalStateException JavaDoc ise) {
139             return ("");
140         }
141     } /* cookieEncode(String) */
142
143
144     public static void test() {
145         try {
146             String JavaDoc original = "testPassword";
147             String JavaDoc encoded = CookieUtil.cookieEncode(original);
148             System.out.println("Encoded:" + encoded);
149
150             String JavaDoc decoded = CookieUtil.cookieDecode(encoded);
151
152             if (original.equals(decoded)) {
153                 System.out.println("Decoded correctly");
154             } else {
155                 System.out.println("Decode failed: '" + decoded + "'");
156             }
157
158             original = "yes";
159             encoded = CookieUtil.cookieEncode(original);
160             System.out.println("Encoded:" + encoded);
161             decoded = CookieUtil.cookieDecode(encoded);
162
163             if (original.equals(decoded)) {
164                 System.out.println("Decoded correctly");
165             } else {
166                 System.out.println("Decode failed: '" + decoded + "'");
167             }
168
169             System.out.println("Decoded:'" +
170                     CookieUtil.cookieDecode("ZkRLGAfiT7e") + "'");
171         } catch (Exception JavaDoc e) {
172             e.printStackTrace(System.out);
173         }
174     }
175 } /* CookieUtil */
176
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