gnu.java.security.key.dss
Class DSSKeyPairX509Codec
- IKeyPairCodec
An implementation of an
IKeyPairCodec that knows how to encode /
decode X.509 ASN.1 external representation of DSS public keys.
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
encodePublicKey
public byte[] encodePublicKey(PublicKey key)
Returns the X.509 ASN.1
SubjectPublicKeyInfo representation of a
DSA public key. The ASN.1 specification, as defined in RFC-3280, and
RFC-2459, is as follows:
SubjectPublicKeyInfo ::= SEQUENCE {
algorithm AlgorithmIdentifier,
subjectPublicKey BIT STRING
}
AlgorithmIdentifier ::= SEQUENCE {
algorithm OBJECT IDENTIFIER,
parameters ANY DEFINED BY algorithm OPTIONAL
}
DssParams ::= SEQUENCE {
p INTEGER,
q INTEGER,
g INTEGER
}
Note that RFC-3280 (page 79) implies that some certificates MAY have an
absent, or NULL, parameters field in their AlgorithmIdentifier element,
implying that those parameters MUST be
inherited from another
certificate. This implementation, encodes a
NULL element as the DER
value of the parameters field when such is the case.
The
subjectPublicKey field, which is a BIT STRING, contains the
DER-encoded form of the DSA public key as an INTEGER.
DSAPublicKey ::= INTEGER -- public key, Y
- encodePublicKey in interface IKeyPairCodec
- the ASN.1 representation of the SubjectPublicKeyInfo in an
X.509 certificate.
getFormatID
public int getFormatID()
Returns the unique identifier (within this library) of the format used to
externalise public and private keys.
- getFormatID in interface IKeyPairCodec
- the identifier of the format, the object supports.
DSSKeyPairX509Codec.java -- X.509 Encoding/Decoding handler
Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version.