/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* Parameters for the TLS PRF (pseudo-random function). The PRF function
* is defined in RFC 2246.
* This class is used to initialize KeyGenerators of the type "TlsPrf".
*
* <p>Instances of this class are immutable.
*
* @since 1.6
* @author Andreas Sterbenz
* @deprecated Sun JDK internal use only --- WILL BE REMOVED in a future
* release.
*/
private final byte[] seed;
private final int outputLength;
private final int prfHashLength;
private final int prfBlockSize;
/**
* Constructs a new TlsPrfParameterSpec.
*
* @param secret the secret to use in the calculation (or null)
* @param label the label to use in the calculation
* @param seed the random seed to use in the calculation
* @param outputLength the length in bytes of the output key to be produced
* @param prfHashAlg the name of the TLS PRF hash algorithm to use.
* Used only for TLS 1.2+. TLS1.1 and earlier use a fixed PRF.
* @param prfHashLength the output length of the TLS PRF hash algorithm.
* Used only for TLS 1.2+.
* @param prfBlockSize the input block size of the TLS PRF hash algorithm.
* Used only for TLS 1.2+.
*
* @throws NullPointerException if label or seed is null
* @throws IllegalArgumentException if outputLength is negative
*/
byte[] seed, int outputLength,
throw new NullPointerException("label and seed must not be null");
}
if (outputLength <= 0) {
throw new IllegalArgumentException("outputLength must be positive");
}
this.outputLength = outputLength;
this.prfHashAlg = prfHashAlg;
this.prfHashLength = prfHashLength;
this.prfBlockSize = prfBlockSize;
}
/**
* Returns the secret to use in the PRF calculation, or null if there is no
* secret.
*
* @return the secret to use in the PRF calculation, or null if there is no
* secret.
*/
return secret;
}
/**
* Returns the label to use in the PRF calcuation.
*
* @return the label to use in the PRF calcuation.
*/
return label;
}
/**
* Returns a copy of the seed to use in the PRF calcuation.
*
* @return a copy of the seed to use in the PRF calcuation.
*/
public byte[] getSeed() {
}
/**
* Returns the length in bytes of the output key to be produced.
*
* @return the length in bytes of the output key to be produced.
*/
public int getOutputLength() {
return outputLength;
}
/**
* Obtains the PRF hash algorithm to use in the PRF calculation.
*
* @return the hash algorithm, or null if no algorithm was specified.
*/
return prfHashAlg;
}
/**
* Obtains the length of PRF hash algorithm.
*
* It would have been preferred to use MessageDigest.getDigestLength(),
* but the API does not require implementations to support the method.
*
* @return the hash algorithm length.
*/
public int getPRFHashLength() {
return prfHashLength;
}
/**
* Obtains the length of PRF hash algorithm.
*
* @return the hash algorithm length.
*/
public int getPRFBlockSize() {
return prfBlockSize;
}
}