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package org.openeuler.sun.security.internal.spec;

import java.security.spec.AlgorithmParameterSpec;

import javax.crypto.SecretKey;

/**
 * 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".
 *
 * 

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. */ @Deprecated public class TlsPrfParameterSpec implements AlgorithmParameterSpec { private final SecretKey secret; private final String label; private final byte[] seed; private final int outputLength; private final String prfHashAlg; 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 */ public TlsPrfParameterSpec(SecretKey secret, String label, byte[] seed, int outputLength, String prfHashAlg, int prfHashLength, int prfBlockSize) { if ((label == null) || (seed == null)) { throw new NullPointerException("label and seed must not be null"); } if (outputLength <= 0) { throw new IllegalArgumentException("outputLength must be positive"); } this.secret = secret; this.label = label; this.seed = seed.clone(); 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. */ public SecretKey getSecret() { return secret; } /** * Returns the label to use in the PRF calcuation. * * @return the label to use in the PRF calcuation. */ public String getLabel() { 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() { return seed.clone(); } /** * 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. */ public String getPRFHashAlg() { 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; } }





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