procyberian/gcc
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Initial revision

Browse source 
From-SVN: r102074
This commit is contained in:
Tom Tromey 2005-07-16 00:30:23 +00:00
parent 6f4434b39b
commit f911ba985a
4557 changed files with 1000262 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

150
libjava/classpath/gnu/java/security/provider/DSAParameters.java Normal file
View file

@ -0,0 +1,150 @@
/* DSAParameters.java --- DSA Parameters Implementation
Copyright (C) 1999, 2003, 2004 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. */
package gnu.java.security.provider;
import gnu.java.io.ASN1ParsingException;
import gnu.java.security.der.DER;
import gnu.java.security.der.DERReader;
import gnu.java.security.der.DERValue;
import gnu.java.security.der.DERWriter;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.AlgorithmParametersSpi;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.DSAParameterSpec;
import java.security.spec.InvalidParameterSpecException;
import java.util.ArrayList;
/*
ASN.1 Encoding for DSA from rfc2459
id-dsa ID ::= { iso(1) member-body(2) us(840) x9-57(10040)
x9cm(4) 1 }
Dss-Parms ::= SEQUENCE {
p INTEGER,
q INTEGER,
g INTEGER }
*/
public class DSAParameters extends AlgorithmParametersSpi
{
private BigInteger q; // the small prime
private BigInteger p; // the big prime
private BigInteger g;
public void engineInit(AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
if( paramSpec instanceof DSAParameterSpec ) {
DSAParameterSpec dsaParamSpec = (DSAParameterSpec)paramSpec;
p = dsaParamSpec.getP();
q = dsaParamSpec.getQ();
g = dsaParamSpec.getG();
}
else
throw new InvalidParameterSpecException("Only accepts DSAParameterSpec");
}
public void engineInit(byte[] params)
throws IOException
{
DERReader in = new DERReader(params);
DERValue val = in.read();
if (val.getValue() != DER.CONSTRUCTED_VALUE)
throw new ASN1ParsingException("badly formed parameters");
try
{
p = (BigInteger) in.read().getValue();
q = (BigInteger) in.read().getValue();
g = (BigInteger) in.read().getValue();
}
catch (Exception x)
{
throw new ASN1ParsingException("badly formed parameters");
}
}
public void engineInit(byte[] params, String format)
throws IOException
{
if( !format.equals("ASN.1") )
throw new IOException("Invalid Format: Only accepts ASN.1");
engineInit( params );
}
public AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec)
throws InvalidParameterSpecException
{
if( paramSpec.isAssignableFrom(DSAParameterSpec.class) )
return new DSAParameterSpec(p, q, g);
else
throw new InvalidParameterSpecException("Only accepts DSAParameterSpec");
}
public byte[] engineGetEncoded()
throws IOException
{
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ArrayList seq = new ArrayList(3);
seq.add(new DERValue(DER.INTEGER, p));
seq.add(new DERValue(DER.INTEGER, q));
seq.add(new DERValue(DER.INTEGER, g));
DERWriter.write(bout, new DERValue(DER.CONSTRUCTED | DER.SEQUENCE, seq));
return bout.toByteArray();
}
public byte[] engineGetEncoded(String format)
throws IOException
{
if( !format.equals("ASN.1") )
throw new IOException("Invalid Format: Only accepts ASN.1");
return engineGetEncoded();
}
public String engineToString()
{
return ("q: " + q + " p: " + p + " g: " + g);
}
}