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Imported GNU Classpath 0.90

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Imported GNU Classpath 0.90
       * scripts/makemake.tcl: Set gnu/java/awt/peer/swing to ignore.
       * gnu/classpath/jdwp/VMFrame.java (SIZE): New constant.
       * java/lang/VMCompiler.java: Use gnu.java.security.hash.MD5.
       * java/lang/Math.java: New override file.
       * java/lang/Character.java: Merged from Classpath.
       (start, end): Now 'int's.
       (canonicalName): New field.
       (CANONICAL_NAME, NO_SPACES_NAME, CONSTANT_NAME): New constants.
       (UnicodeBlock): Added argument.
       (of): New overload.
       (forName): New method.
       Updated unicode blocks.
       (sets): Updated.
       * sources.am: Regenerated.
       * Makefile.in: Likewise.

From-SVN: r111942
This commit is contained in:
Mark Wielaard
2006-03-10 21:46:48 +00:00
parent 27079765d0
commit 8aa540d2f7
1367 changed files with 188789 additions and 22762 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libjava/classpath/gnu/java/security/sig/dss/DSSSignature.java
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/* DSSSignature.java --
Copyright (C) 2001, 2002, 2003, 2006 Free Software Foundation, Inc.
This file is a 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 of the License, 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; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, 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.sig.dss;
import gnu.java.security.Registry;
import gnu.java.security.hash.IMessageDigest;
import gnu.java.security.hash.Sha160;
import gnu.java.security.prng.IRandom;
import gnu.java.security.sig.BaseSignature;
import gnu.java.security.sig.ISignature;
import java.math.BigInteger;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.interfaces.DSAPrivateKey;
import java.security.interfaces.DSAPublicKey;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
/**
* <p>The DSS (Digital Signature Standard) algorithm makes use of the following
* parameters:</p>
*
* <ol>
* <li>p: A prime modulus, where <code>2<sup>L-1</sup> &lt; p &lt; 2<sup>L</sup>
* </code> for <code>512 &lt;= L &lt;= 1024</code> and <code>L</code> a
* multiple of <code>64</code>.</li>
* <li>q: A prime divisor of <code>p - 1</code>, where <code>2<sup>159</sup>
* &lt; q &lt; 2<sup>160</sup></code>.</li>
* <li>g: Where <code>g = h<sup>(p-1)</sup>/q mod p</code>, where
* <code>h</code> is any integer with <code>1 &lt; h &lt; p - 1</code> such
* that <code>h<sup> (p-1)</sup>/q mod p > 1</code> (<code>g</code> has order
* <code>q mod p</code>).</li>
* <li>x: A randomly or pseudorandomly generated integer with <code>0 &lt; x
* &lt; q</code>.</li>
* <li>y: <code>y = g<sup>x</sup> mod p</code>.</li>
* <li>k: A randomly or pseudorandomly generated integer with <code>0 &lt; k
* &lt; q</code>.</li>
* </ol>
*
* <p>The integers <code>p</code>, <code>q</code>, and <code>g</code> can be
* public and can be common to a group of users. A user's private and public
* keys are <code>x</code> and <code>y</code>, respectively. They are normally
* fixed for a period of time. Parameters <code>x</code> and <code>k</code> are
* used for signature generation only, and must be kept secret. Parameter
* <code>k</code> must be regenerated for each signature.</p>
*
* <p>The signature of a message <code>M</code> is the pair of numbers <code>r</code>
* and <code>s</code> computed according to the equations below:</p>
*
* <ul>
* <li><code>r = (g<sup>k</sup> mod p) mod q</code> and</li>
* <li><code>s = (k<sup>-1</sup>(SHA(M) + xr)) mod q</code>.</li>
* </ul>
*
* <p>In the above, <code>k<sup>-1</sup></code> is the multiplicative inverse of
* <code>k</code>, <code>mod q</code>; i.e., <code>(k<sup>-1</sup> k) mod q = 1
* </code> and <code>0 &lt; k-1 &lt; q</code>. The value of <code>SHA(M)</code>
* is a 160-bit string output by the Secure Hash Algorithm specified in FIPS 180.
* For use in computing <code>s</code>, this string must be converted to an
* integer.</p>
*
* <p>As an option, one may wish to check if <code>r == 0</code> or <code>s == 0
* </code>. If either <code>r == 0</code> or <code>s == 0</code>, a new value
* of <code>k</code> should be generated and the signature should be
* recalculated (it is extremely unlikely that <code>r == 0</code> or <code>s ==
* 0</code> if signatures are generated properly).</p>
*
* <p>The signature is transmitted along with the message to the verifier.</p>
*
* <p>References:</p>
* <ol>
* <li><a href="http://www.itl.nist.gov/fipspubs/fip186.htm">Digital
* Signature Standard (DSS)</a>, Federal Information Processing Standards
* Publication 186. National Institute of Standards and Technology.</li>
* </ol>
*
* @version $Revision: 1.1 $
*/
public class DSSSignature extends BaseSignature
{
// Constants and variables
// -------------------------------------------------------------------------
// Constructor(s)
// -------------------------------------------------------------------------
/** Trivial 0-arguments constructor. */
public DSSSignature()
{
super(Registry.DSS_SIG, new Sha160());
}
/** Private constructor for cloning purposes. */
private DSSSignature(DSSSignature that)
{
this();
this.publicKey = that.publicKey;
this.privateKey = that.privateKey;
this.md = (IMessageDigest) that.md.clone();
}
// Class methods
// -------------------------------------------------------------------------
public static final BigInteger[] sign(final DSAPrivateKey k, final byte[] h)
{
final DSSSignature sig = new DSSSignature();
final Map attributes = new HashMap();
attributes.put(ISignature.SIGNER_KEY, k);
sig.setupSign(attributes);
return sig.computeRS(h);
}
public static final BigInteger[] sign(final DSAPrivateKey k, final byte[] h,
Random rnd)
{
final DSSSignature sig = new DSSSignature();
final Map attributes = new HashMap();
attributes.put(ISignature.SIGNER_KEY, k);
if (rnd != null)
{
attributes.put(ISignature.SOURCE_OF_RANDOMNESS, rnd);
}
sig.setupSign(attributes);
return sig.computeRS(h);
}
public static final BigInteger[] sign(final DSAPrivateKey k, final byte[] h,
IRandom irnd)
{
final DSSSignature sig = new DSSSignature();
final Map attributes = new HashMap();
attributes.put(ISignature.SIGNER_KEY, k);
if (irnd != null)
{
attributes.put(ISignature.SOURCE_OF_RANDOMNESS, irnd);
}
sig.setupSign(attributes);
return sig.computeRS(h);
}
public static final boolean verify(final DSAPublicKey k, final byte[] h,
final BigInteger[] rs)
{
final DSSSignature sig = new DSSSignature();
final Map attributes = new HashMap();
attributes.put(ISignature.VERIFIER_KEY, k);
sig.setupVerify(attributes);
return sig.checkRS(rs, h);
}
// Implementation of abstract methods in superclass
// -------------------------------------------------------------------------
public Object clone()
{
return new DSSSignature(this);
}
protected void setupForVerification(PublicKey k)
throws IllegalArgumentException
{
if (!(k instanceof DSAPublicKey))
{
throw new IllegalArgumentException();
}
this.publicKey = k;
}
protected void setupForSigning(PrivateKey k) throws IllegalArgumentException
{
if (!(k instanceof DSAPrivateKey))
{
throw new IllegalArgumentException();
}
this.privateKey = k;
}
protected Object generateSignature() throws IllegalStateException
{
// BigInteger p = ((DSAPrivateKey) privateKey).getParams().getP();
// BigInteger q = ((DSAPrivateKey) privateKey).getParams().getQ();
// BigInteger g = ((DSAPrivateKey) privateKey).getParams().getG();
// BigInteger x = ((DSAPrivateKey) privateKey).getX();
// BigInteger m = new BigInteger(1, md.digest());
// BigInteger k, r, s;
//
// byte[] kb = new byte[20]; // we'll use 159 bits only
// while (true) {
// this.nextRandomBytes(kb);
// k = new BigInteger(1, kb);
// k.clearBit(159);
// r = g.modPow(k, p).mod(q);
// if (r.equals(BigInteger.ZERO)) {
// continue;
// }
// s = m.add(x.multiply(r)).multiply(k.modInverse(q)).mod(q);
// if (s.equals(BigInteger.ZERO)) {
// continue;
// }
// break;
// }
final BigInteger[] rs = computeRS(md.digest());
// return encodeSignature(r, s);
return encodeSignature(rs[0], rs[1]);
}
protected boolean verifySignature(Object sig) throws IllegalStateException
{
final BigInteger[] rs = decodeSignature(sig);
// BigInteger r = rs[0];
// BigInteger s = rs[1];
//
// BigInteger g = ((DSAPublicKey) publicKey).getParams().getG();
// BigInteger p = ((DSAPublicKey) publicKey).getParams().getP();
// BigInteger q = ((DSAPublicKey) publicKey).getParams().getQ();
// BigInteger y = ((DSAPublicKey) publicKey).getY();
// BigInteger w = s.modInverse(q);
//
// byte bytes[] = md.digest();
// BigInteger u1 = w.multiply(new BigInteger(1, bytes)).mod(q);
// BigInteger u2 = r.multiply(w).mod(q);
//
// BigInteger v = g.modPow(u1, p).multiply(y.modPow(u2, p)).mod(p).mod(q);
// return v.equals(r);
return checkRS(rs, md.digest());
}
// Other instance methods
// -------------------------------------------------------------------------
/**
* Returns the output of a signature generation phase.<p>
*
* @return an object encapsulating the DSS signature pair <code>r</code> and
* <code>s</code>.
*/
private Object encodeSignature(BigInteger r, BigInteger s)
{
return new BigInteger[] { r, s };
}
/**
* Returns the output of a previously generated signature object as a pair
* of {@link java.math.BigInteger}.<p>
*
* @return the DSS signature pair <code>r</code> and <code>s</code>.
*/
private BigInteger[] decodeSignature(Object signature)
{
return (BigInteger[]) signature;
}
private BigInteger[] computeRS(final byte[] digestBytes)
{
final BigInteger p = ((DSAPrivateKey) privateKey).getParams().getP();
final BigInteger q = ((DSAPrivateKey) privateKey).getParams().getQ();
final BigInteger g = ((DSAPrivateKey) privateKey).getParams().getG();
final BigInteger x = ((DSAPrivateKey) privateKey).getX();
final BigInteger m = new BigInteger(1, digestBytes);
BigInteger k, r, s;
final byte[] kb = new byte[20]; // we'll use 159 bits only
while (true)
{
this.nextRandomBytes(kb);
k = new BigInteger(1, kb);
k.clearBit(159);
r = g.modPow(k, p).mod(q);
if (r.equals(BigInteger.ZERO))
{
continue;
}
s = m.add(x.multiply(r)).multiply(k.modInverse(q)).mod(q);
if (s.equals(BigInteger.ZERO))
{
continue;
}
break;
}
return new BigInteger[] { r, s };
}
private boolean checkRS(final BigInteger[] rs, final byte[] digestBytes)
{
final BigInteger r = rs[0];
final BigInteger s = rs[1];
final BigInteger g = ((DSAPublicKey) publicKey).getParams().getG();
final BigInteger p = ((DSAPublicKey) publicKey).getParams().getP();
final BigInteger q = ((DSAPublicKey) publicKey).getParams().getQ();
final BigInteger y = ((DSAPublicKey) publicKey).getY();
final BigInteger w = s.modInverse(q);
final BigInteger u1 = w.multiply(new BigInteger(1, digestBytes)).mod(q);
final BigInteger u2 = r.multiply(w).mod(q);
final BigInteger v = g.modPow(u1, p).multiply(y.modPow(u2, p)).mod(p).mod(q);
return v.equals(r);
}
}
libjava/classpath/gnu/java/security/sig/dss/DSSSignatureRawCodec.java
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/* DSSSignatureRawCodec.java --
Copyright (C) 2001, 2002, 2003, 2006 Free Software Foundation, Inc.
This file is a 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 of the License, 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; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, 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.sig.dss;
import gnu.java.security.Registry;
import gnu.java.security.sig.ISignatureCodec;
import java.io.ByteArrayOutputStream;
import java.math.BigInteger;
/**
* <p>An object that implements the {@link ISignatureCodec} operations for the
* <i>Raw</i> format to use with DSS signatures.</p>
*
* @version $Revision: 1.1 $
*/
public class DSSSignatureRawCodec implements ISignatureCodec
{
// Constants and variables
// -------------------------------------------------------------------------
// Constructor(s)
// -------------------------------------------------------------------------
// implicit 0-arguments constructor
// Class methods
// -------------------------------------------------------------------------
// Instance methods
// -------------------------------------------------------------------------
// gnu.crypto.sig.ISignatureCodec interface implementation -----------------
public int getFormatID()
{
return RAW_FORMAT;
}
/**
* <p>Returns the encoded form of the designated DSS (Digital Signature
* Standard) signature object according to the <i>Raw</i> format supported by
* this library.</p>
*
* <p>The <i>Raw</i> format for a DSA signature, in this implementation, is a
* byte sequence consisting of the following:</p>
*
* <ol>
* <li>4-byte magic consisting of the value of the literal
* {@link Registry#MAGIC_RAW_DSS_SIGNATURE},</li>
* <li>1-byte version consisting of the constant: 0x01,</li>
* <li>4-byte count of following bytes representing the DSS parameter
* <code>r</code> in internet order,</li>
* <li>n-bytes representation of a {@link BigInteger} obtained by invoking
* the <code>toByteArray()</code> method on the DSS parameter <code>r</code>,</li>
* <li>4-byte count of following bytes representing the DSS parameter
* <code>s</code>,</li>
* <li>n-bytes representation of a {@link BigInteger} obtained by invoking
* the <code>toByteArray()</code> method on the DSS parameter <code>s</code>.</li>
* </ol>
*
* @param signature the signature to encode, consisting of the two DSS
* parameters <code>r</code> and <code>s</code> as a {@link java.math.BigInteger}
* array.
* @return the <i>Raw</i> format encoding of the designated signature.
* @exception IllegalArgumentException if the designated signature is not a
* DSS (Digital Signature Standard) one.
*/
public byte[] encodeSignature(Object signature)
{
BigInteger r, s;
try
{
BigInteger[] sig = (BigInteger[]) signature;
r = sig[0];
s = sig[1];
}
catch (Exception x)
{
throw new IllegalArgumentException("key");
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
// magic
baos.write(Registry.MAGIC_RAW_DSS_SIGNATURE[0]);
baos.write(Registry.MAGIC_RAW_DSS_SIGNATURE[1]);
baos.write(Registry.MAGIC_RAW_DSS_SIGNATURE[2]);
baos.write(Registry.MAGIC_RAW_DSS_SIGNATURE[3]);
// version
baos.write(0x01);
// r
byte[] buffer = r.toByteArray();
int length = buffer.length;
baos.write(length >>> 24);
baos.write((length >>> 16) & 0xFF);
baos.write((length >>> 8) & 0xFF);
baos.write(length & 0xFF);
baos.write(buffer, 0, length);
// s
buffer = s.toByteArray();
length = buffer.length;
baos.write(length >>> 24);
baos.write((length >>> 16) & 0xFF);
baos.write((length >>> 8) & 0xFF);
baos.write(length & 0xFF);
baos.write(buffer, 0, length);
return baos.toByteArray();
}
public Object decodeSignature(byte[] k)
{
// magic
if (k[0] != Registry.MAGIC_RAW_DSS_SIGNATURE[0]
|| k[1] != Registry.MAGIC_RAW_DSS_SIGNATURE[1]
|| k[2] != Registry.MAGIC_RAW_DSS_SIGNATURE[2]
|| k[3] != Registry.MAGIC_RAW_DSS_SIGNATURE[3])
{
throw new IllegalArgumentException("magic");
}
// version
if (k[4] != 0x01)
{
throw new IllegalArgumentException("version");
}
int i = 5;
int l;
byte[] buffer;
// r
l = k[i++] << 24 | (k[i++] & 0xFF) << 16 | (k[i++] & 0xFF) << 8
| (k[i++] & 0xFF);
buffer = new byte[l];
System.arraycopy(k, i, buffer, 0, l);
i += l;
BigInteger r = new BigInteger(1, buffer);
// s
l = k[i++] << 24 | (k[i++] & 0xFF) << 16 | (k[i++] & 0xFF) << 8
| (k[i++] & 0xFF);
buffer = new byte[l];
System.arraycopy(k, i, buffer, 0, l);
i += l;
BigInteger s = new BigInteger(1, buffer);
return new BigInteger[] { r, s };
}
}
libjava/classpath/gnu/java/security/sig/dss/DSSSignatureX509Codec.java
+193
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/* DSSSignatureX509Codec.java -- X.509 encoder/decoder for DSS signatures
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. */
package gnu.java.security.sig.dss;
import gnu.java.security.Registry;
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 gnu.java.security.sig.ISignatureCodec;
import gnu.java.security.util.DerUtil;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.InvalidParameterException;
import java.util.ArrayList;
/**
* An implementation of an {@link ISignatureCodec} that knows to encode and
* decode DSS signatures into the raw bytes which would constitute a DER-encoded
* form of the ASN.1 structure defined in RFC-2459, and RFC-2313 as described in
* the next paragraphs.
* <p>
* Digital signatures when transmitted in an X.509 certificates are encoded
* in DER (Distinguished Encoding Rules) as a BIT STRING; i.e.
*
* <pre>
* Certificate ::= SEQUENCE {
* tbsCertificate TBSCertificate,
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING
* }
* </pre>
* <p>
* The output of the encoder, and the input of the decoder, of this codec are
* then the <i>raw</i> bytes of such a BIT STRING; i.e. not the DER-encoded
* form itself.
* <p>
* RFC-2459 states that, for the Digital Signature Standard (DSS), which
* generates two MPIs, commonly called <code>r</code> and <code>s</code>, as the
* result of digitally signing a message, these two numbers will be transferred
* as the following ASN.1 structure:
*
* <pre>
* Dss-Sig-Value ::= SEQUENCE {
* r INTEGER,
* s INTEGER
* }
* </pre>
* <p>
* Client code that needs to build a DER BIT STRING <b>MUST</b> construct such
* an ASN.1 value. The following is an example of how to do this:
* <p>
* <pre>
* ...
* import gnu.java.security.der.BitString;
* import gnu.java.security.der.DER;
* import gnu.java.security.der.DERValue;
* ...
* DERValue bitString = new DERValue(DER.BIT_STRING, new BitString(sigBytes));
* ...
* </pre>
*/
public class DSSSignatureX509Codec
implements ISignatureCodec
{
// implicit 0-arguments constructor
public int getFormatID()
{
return Registry.X509_ENCODING_ID;
}
/**
* Encodes a DSS Signature output as the <i>signature</i> raw bytes which can
* be used to construct an ASN.1 DER-encoded BIT STRING as defined in the
* documentation of this class.
*
* @param signature the output of the DSS signature algorithm; i.e. the value
* returned by the invocation of
* {@link gnu.java.security.sig.ISignature#sign()} method. In the
* case of a DSS signature this is an array of two MPIs called
* <code>r</code> and <code>s</code>.
* @return the raw bytes of a DSS signature which could be then used as the
* contents of a BIT STRING as per rfc-2459.
* @throws InvalidParameterException if an exception occurs during the
* marshalling process.
*/
public byte[] encodeSignature(Object signature)
{
BigInteger[] rs = (BigInteger[]) signature;
DERValue derR = new DERValue(DER.INTEGER, rs[0]);
DERValue derS = new DERValue(DER.INTEGER, rs[1]);
ArrayList dssSigValue = new ArrayList(2);
dssSigValue.add(derR);
dssSigValue.add(derS);
DERValue derDssSigValue = new DERValue(DER.CONSTRUCTED | DER.SEQUENCE,
dssSigValue);
byte[] result;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try
{
DERWriter.write(baos, derDssSigValue);
result = baos.toByteArray();
}
catch (IOException x)
{
InvalidParameterException y = new InvalidParameterException();
y.initCause(x);
throw y;
}
return result;
}
/**
* Decodes a <i>signature</i> as defined in the documentation of this class.
*
* @param input the byte array to unmarshall into a valid DSS signature
* instance; i.e. an array of two MPIs. MUST NOT be null.
* @return an array of two MPIs, <code>r</code> and <code>s</code> in this
* order, decoded from the designated <code>input</code>.
* @throw InvalidParameterException if an exception occurs during the
* unmarshalling process.
*/
public Object decodeSignature(byte[] input)
{
if (input == null)
throw new InvalidParameterException("Input bytes MUST NOT be null");
BigInteger r, s;
DERReader der = new DERReader(input);
try
{
DERValue derDssSigValue = der.read();
DerUtil.checkIsConstructed(derDssSigValue, "Wrong Dss-Sig-Value field");
DERValue val = der.read();
DerUtil.checkIsBigInteger(val, "Wrong R field");
r = (BigInteger) val.getValue();
val = der.read();
DerUtil.checkIsBigInteger(val, "Wrong S field");
s = (BigInteger) val.getValue();
}
catch (IOException x)
{
InvalidParameterException y = new InvalidParameterException();
y.initCause(x);
throw y;
}
return new BigInteger[] { r, s };
}
}