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11 package org.mule.module.pgp;
12
13 import org.mule.RequestContext;
14 import org.mule.api.MuleEvent;
15 import org.mule.api.lifecycle.InitialisationException;
16 import org.mule.api.security.CredentialsAccessor;
17 import org.mule.api.security.CryptoFailureException;
18 import org.mule.config.i18n.CoreMessages;
19 import org.mule.module.pgp.i18n.PGPMessages;
20 import org.mule.security.AbstractNamedEncryptionStrategy;
21
22 import java.io.InputStream;
23 import java.util.Calendar;
24
25 import org.apache.commons.logging.Log;
26 import org.apache.commons.logging.LogFactory;
27 import org.bouncycastle.jce.provider.BouncyCastleProvider;
28 import org.bouncycastle.openpgp.PGPPublicKey;
29
30 public class KeyBasedEncryptionStrategy extends AbstractNamedEncryptionStrategy
31 {
32
33
34
35 protected static final Log logger = LogFactory.getLog(KeyBasedEncryptionStrategy.class);
36
37 private PGPKeyRing keyManager;
38 private CredentialsAccessor credentialsAccessor;
39 private boolean checkKeyExpirity = false;
40
41 public void initialise() throws InitialisationException
42 {
43 try
44 {
45 java.security.Security.addProvider(new BouncyCastleProvider());
46 }
47 catch (Exception e)
48 {
49 throw new InitialisationException(CoreMessages.failedToCreate("KeyBasedEncryptionStrategy"), e,
50 this);
51 }
52 }
53
54 public InputStream encrypt(InputStream data, Object cryptInfo) throws CryptoFailureException
55 {
56 try
57 {
58 PGPCryptInfo pgpCryptInfo = this.safeGetCryptInfo(cryptInfo);
59 PGPPublicKey publicKey = pgpCryptInfo.getPublicKey();
60 return new LazyInputStream(new EncryptOutputStreamWriter(data, publicKey));
61 }
62 catch (Exception e)
63 {
64 throw new CryptoFailureException(this, e);
65 }
66 }
67
68 public InputStream decrypt(InputStream data, Object cryptInfo) throws CryptoFailureException
69 {
70 try
71 {
72 PGPCryptInfo pgpCryptInfo = this.safeGetCryptInfo(cryptInfo);
73 PGPPublicKey publicKey = pgpCryptInfo.getPublicKey();
74 return new LazyInputStream(new DecryptOutputStreamWriter(data, publicKey,
75 this.keyManager.getSecretKey(), this.keyManager.getSecretPassphrase()));
76 }
77 catch (Exception e)
78 {
79 throw new CryptoFailureException(this, e);
80 }
81 }
82
83 private PGPCryptInfo safeGetCryptInfo(Object cryptInfo)
84 {
85 if (cryptInfo == null)
86 {
87 MuleEvent event = RequestContext.getEvent();
88 PGPPublicKey publicKey = keyManager.getPublicKey((String) this.getCredentialsAccessor().getCredentials(event));
89 this.checkKeyExpirity(publicKey);
90 return new PGPCryptInfo(publicKey, false);
91 }
92 else
93 {
94 PGPCryptInfo info = (PGPCryptInfo) cryptInfo;
95 this.checkKeyExpirity(info.getPublicKey());
96 return info;
97 }
98 }
99
100 private void checkKeyExpirity(PGPPublicKey publicKey)
101 {
102 if (this.isCheckKeyExpirity() && publicKey.getValidDays() != 0)
103 {
104 Calendar calendar = Calendar.getInstance();
105 calendar.setTime(publicKey.getCreationTime());
106 calendar.add(Calendar.DATE, publicKey.getValidDays());
107
108 if (!calendar.getTime().after(Calendar.getInstance().getTime()))
109 {
110 throw new InvalidPublicKeyException(PGPMessages.pgpPublicKeyExpired());
111 }
112 }
113 }
114
115 public PGPKeyRing getKeyManager()
116 {
117 return keyManager;
118 }
119
120 public void setKeyManager(PGPKeyRing keyManager)
121 {
122 this.keyManager = keyManager;
123 }
124
125 public CredentialsAccessor getCredentialsAccessor()
126 {
127 return credentialsAccessor;
128 }
129
130 public void setCredentialsAccessor(CredentialsAccessor credentialsAccessor)
131 {
132 this.credentialsAccessor = credentialsAccessor;
133 }
134
135 public boolean isCheckKeyExpirity()
136 {
137 return checkKeyExpirity;
138 }
139
140 public void setCheckKeyExpirity(boolean checkKeyExpirity)
141 {
142 this.checkKeyExpirity = checkKeyExpirity;
143 }
144 }