Source Code Cross Referenced for ShaPasswordEncoder.java in  » Security » acegi-security » org » acegisecurity » providers » encoding » Java Source Code / Java DocumentationJava Source Code and Java Documentation

01:        /* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
02:         *
03:         * Licensed under the Apache License, Version 2.0 (the "License");
04:         * you may not use this file except in compliance with the License.
05:         * You may obtain a copy of the License at
06:         *
07:         *     http://www.apache.org/licenses/LICENSE-2.0
08:         *
09:         * Unless required by applicable law or agreed to in writing, software
10:         * distributed under the License is distributed on an "AS IS" BASIS,
11:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12:         * See the License for the specific language governing permissions and
13:         * limitations under the License.
14:         */
15:        package org.acegisecurity.providers.encoding;
16:
17:        /**
18:         * <p>SHA implementation of PasswordEncoder.</p>
19:         * <p>If a <code>null</code> password is presented, it will be treated as an empty <code>String</code> ("")
20:         * password.</p>
21:         * <p>As SHA is a one-way hash, the salt can contain any characters. The default strength for the SHA encoding is SHA-1.
22:         * If you wish to use higher strengths use the argumented constructor.
23:         * {@link #ShaPasswordEncoder(int strength)}
24:         * </p>
25:         * <p>
26:         * The applicationContext example...
27:         * <pre>
28:         * &lt;bean id="passwordEncoder" class="org.acegisecurity.providers.encoding.ShaPasswordEncoder"&gt;
29:         *     &lt;constructor-arg value="256"/>
30:         * &lt;/bean&gt;
31:         * </pre>
32:         *
33:         * @author Ray Krueger
34:         * @author colin sampaleanu
35:         * @author Ben Alex
36:         * @version $Id: ShaPasswordEncoder.java 1784 2007-02-24 21:00:24Z luke_t $
37:         */
38:        public class ShaPasswordEncoder extends MessageDigestPasswordEncoder {
39:
40:            /**
41:             * Initializes the ShaPasswordEncoder for SHA-1 strength
42:             */
43:            public ShaPasswordEncoder() {
44:                this (1);
45:            }
46:
47:            /**
48:             * Initialize the ShaPasswordEncoder with a given SHA stength as supported by the JVM
49:             * EX: <code>ShaPasswordEncoder encoder = new ShaPasswordEncoder(256);</code> initializes with SHA-256
50:             *
51:             * @param strength EX: 1, 256, 384, 512
52:             */
53:            public ShaPasswordEncoder(int strength) {
54:                super ("SHA-" + strength);
55:            }
56:        }