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8  * particular file as subject to the "Classpath" exception as provided
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11  * This code is distributed in the hope that it will be useful, but WITHOUT
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13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
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25 
26 package com.sun.crypto.provider;
27 
28 import java.io.*;
29 import java.security.AlgorithmParametersSpi;
30 import java.security.spec.AlgorithmParameterSpec;
31 import java.security.spec.InvalidParameterSpecException;
32 
33 /**
34  * This class implements the parameter (IV) used with the AES algorithm
35  * in feedback-mode. IV is defined in the standards as follows:
36  *
37  * <pre>
38  * IV ::= OCTET STRING  -- 16 octets
39  * </pre>
40  *
41  * @author Valerie Peng
42  *
43  */
44 public final class AESParameters extends AlgorithmParametersSpi {
45 
46     private BlockCipherParamsCore core;
47 
AESParameters()48     public AESParameters() {
49         core = new BlockCipherParamsCore(AESConstants.AES_BLOCK_SIZE);
50     }
51 
engineInit(AlgorithmParameterSpec paramSpec)52     protected void engineInit(AlgorithmParameterSpec paramSpec)
53         throws InvalidParameterSpecException {
54         core.init(paramSpec);
55     }
56 
engineInit(byte[] encoded)57     protected void engineInit(byte[] encoded)
58         throws IOException {
59         core.init(encoded);
60     }
61 
engineInit(byte[] encoded, String decodingMethod)62     protected void engineInit(byte[] encoded, String decodingMethod)
63         throws IOException {
64         core.init(encoded, decodingMethod);
65     }
66 
67     protected <T extends AlgorithmParameterSpec>
engineGetParameterSpec(Class<T> paramSpec)68         T engineGetParameterSpec(Class<T> paramSpec)
69         throws InvalidParameterSpecException {
70         if (AlgorithmParameterSpec.class.isAssignableFrom(paramSpec)) {
71             return core.getParameterSpec(paramSpec);
72         } else {
73             throw new InvalidParameterSpecException
74                 ("Inappropriate parameter Specification");
75         }
76     }
77 
engineGetEncoded()78     protected byte[] engineGetEncoded() throws IOException {
79         return core.getEncoded();
80     }
81 
engineGetEncoded(String encodingMethod)82     protected byte[] engineGetEncoded(String encodingMethod)
83         throws IOException {
84         return core.getEncoded();
85     }
86 
engineToString()87     protected String engineToString() {
88         return core.toString();
89     }
90 }
91