01: /*
02: * Copyright (c) 2007, intarsys consulting GmbH
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, are permitted provided that the following conditions are met:
06: *
07: * - Redistributions of source code must retain the above copyright notice,
08: * this list of conditions and the following disclaimer.
09: *
10: * - Redistributions in binary form must reproduce the above copyright notice,
11: * this list of conditions and the following disclaimer in the documentation
12: * and/or other materials provided with the distribution.
13: *
14: * - Neither the name of intarsys nor the names of its contributors may be used
15: * to endorse or promote products derived from this software without specific
16: * prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28: * POSSIBILITY OF SUCH DAMAGE.
29: */
30: package de.intarsys.pdf.crypt;
31:
32: import de.intarsys.pdf.cos.COSDictionary;
33: import de.intarsys.pdf.cos.COSObjectKey;
34: import de.intarsys.pdf.st.STDocument;
35: import de.intarsys.tools.authenticate.IPasswordProvider;
36:
37: /**
38: * This object is responsible to manage the PDF documents security context and
39: * object de/encryption. It implements the security mechanics as described in
40: * the PDF spec up to revision 4.
41: * <p>
42: * The {@link ISystemSecurityHandler} dispatches de/encryption to either the
43: * standard {@link ICryptHandler} instances or (with /V 4 encryption) the
44: * {@link ISecurityHandler} installed.
45: */
46: public interface ISystemSecurityHandler {
47:
48: public byte[] decryptString(COSObjectKey key, byte[] bytes)
49: throws COSSecurityException;
50:
51: public byte[] decryptStream(COSObjectKey key, COSDictionary dict,
52: byte[] bytes) throws COSSecurityException;
53:
54: public byte[] decryptFile(COSObjectKey key, COSDictionary dict,
55: byte[] bytes) throws COSSecurityException;
56:
57: public byte[] encryptString(COSObjectKey key, byte[] bytes)
58: throws COSSecurityException;
59:
60: public byte[] encryptStream(COSObjectKey key, COSDictionary dict,
61: byte[] bytes) throws COSSecurityException;
62:
63: public byte[] encryptFile(COSObjectKey key, COSDictionary dict,
64: byte[] bytes) throws COSSecurityException;
65:
66: public ISecurityHandler getSecurityHandler();
67:
68: public void init(STDocument document, COSEncryption encryption)
69: throws COSSecurityException;
70:
71: /**
72: * Perform an authentication of the current "user" on behalf of the
73: * information in the encryption dictionary.
74: * <p>
75: * In most situations this will consist of checking user/owner password and
76: * setting the resulting access permissions.
77: *
78: * @throws COSSecurityException
79: */
80: public void authenticate(IPasswordProvider passwordProvider)
81: throws COSSecurityException;
82:
83: }
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