J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 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). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.security.x509; |
| 27 | |
| 28 | import java.security.Signature; |
| 29 | import java.security.SignatureException; |
| 30 | import java.security.Signer; |
| 31 | import java.security.NoSuchAlgorithmException; |
| 32 | |
| 33 | /** |
| 34 | * This class provides a binding between a Signature object and an |
| 35 | * authenticated X.500 name (from an X.509 certificate chain), which |
| 36 | * is needed in many public key signing applications. |
| 37 | * |
| 38 | * <P>The name of the signer is important, both because knowing it is the |
| 39 | * whole point of the signature, and because the associated X.509 certificate |
| 40 | * is always used to verify the signature. |
| 41 | * |
| 42 | * <P><em>The X.509 certificate chain is temporarily not associated with |
| 43 | * the signer, but this omission will be resolved.</em> |
| 44 | * |
| 45 | * |
| 46 | * @author David Brownell |
| 47 | * @author Amit Kapoor |
| 48 | * @author Hemma Prafullchandra |
| 49 | */ |
| 50 | public final class X500Signer extends Signer |
| 51 | { |
| 52 | private static final long serialVersionUID = -8609982645394364834L; |
| 53 | |
| 54 | /** |
| 55 | * Called for each chunk of the data being signed. That |
| 56 | * is, you can present the data in many chunks, so that |
| 57 | * it doesn't need to be in a single sequential buffer. |
| 58 | * |
| 59 | * @param buf buffer holding the next chunk of the data to be signed |
| 60 | * @param offset starting point of to-be-signed data |
| 61 | * @param len how many bytes of data are to be signed |
| 62 | * @exception SignatureException on errors. |
| 63 | */ |
| 64 | public void update(byte buf[], int offset, int len) |
| 65 | throws SignatureException { |
| 66 | sig.update (buf, offset, len); |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Produces the signature for the data processed by update(). |
| 71 | * |
| 72 | * @exception SignatureException on errors. |
| 73 | */ |
| 74 | public byte[] sign() throws SignatureException { |
| 75 | return sig.sign(); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Returns the algorithm used to sign. |
| 80 | */ |
| 81 | public AlgorithmId getAlgorithmId() { |
| 82 | return algid; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Returns the name of the signing agent. |
| 87 | */ |
| 88 | public X500Name getSigner() { |
| 89 | return agent; |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * Constructs a binding between a signature and an X500 name |
| 94 | * from an X.509 certificate. |
| 95 | */ |
| 96 | // package private ----hmmmmm ????? |
| 97 | public X500Signer(Signature sig, X500Name agent) { |
| 98 | if (sig == null || agent == null) |
| 99 | throw new IllegalArgumentException ("null parameter"); |
| 100 | |
| 101 | this.sig = sig; |
| 102 | this.agent = agent; |
| 103 | |
| 104 | try { |
| 105 | this.algid = AlgorithmId.getAlgorithmId(sig.getAlgorithm()); |
| 106 | |
| 107 | } catch (NoSuchAlgorithmException e) { |
| 108 | throw new RuntimeException("internal error! " + e.getMessage()); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | private Signature sig; |
| 113 | private X500Name agent; // XXX should be X509CertChain |
| 114 | private AlgorithmId algid; |
| 115 | } |