org.bouncycastle.crypto.fips.SHA384Digest Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bc-fips Show documentation

The FIPS 140-3 Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms certified to FIPS 140-3 level 1. This jar contains JCE provider and low-level API for the BC-FJA version 2.0.0, FIPS Certificate #4743. Please see certificate for certified platform details.

There is a newer version: 2.0.0

Show newest version

/***************************************************************/
/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
/***************************************************************/
package org.bouncycastle.crypto.fips;

import org.bouncycastle.util.Memoable;
import org.bouncycastle.util.Pack;


/**
 * FIPS 180-2 implementation of SHA-384.
 *
 *  *         block  word  digest
 * SHA-1   512    32    160
 * SHA-256 512    32    256
 * SHA-384 1024   64    384
 * SHA-512 1024   64    512
 * 
 */
class SHA384Digest
    extends LongDigest
{
    private static final int    DIGEST_LENGTH = 48;

    /**
     * Standard constructor
     */
    public SHA384Digest()
    {
    }

    /**
     * Copy constructor.  This will copy the state of the provided
     * message digest.
     */
    public SHA384Digest(SHA384Digest t)
    {
        super(t);
    }

    public String getAlgorithmName()
    {
        return "SHA-384";
    }

    public int getDigestSize()
    {
        return DIGEST_LENGTH;
    }

    public int doFinal(
        byte[]  out,
        int     outOff)
    {
        finish();

        Pack.longToBigEndian(H1, out, outOff);
        Pack.longToBigEndian(H2, out, outOff + 8);
        Pack.longToBigEndian(H3, out, outOff + 16);
        Pack.longToBigEndian(H4, out, outOff + 24);
        Pack.longToBigEndian(H5, out, outOff + 32);
        Pack.longToBigEndian(H6, out, outOff + 40);

        reset();

        return DIGEST_LENGTH;
    }

    /**
     * reset the chaining variables
     */
    public void reset()
    {
        super.reset();

        /* SHA-384 initial hash value
         * The first 64 bits of the fractional parts of the square roots
         * of the 9th through 16th prime numbers
         */
        H1 = 0xcbbb9d5dc1059ed8l;
        H2 = 0x629a292a367cd507l;
        H3 = 0x9159015a3070dd17l;
        H4 = 0x152fecd8f70e5939l;
        H5 = 0x67332667ffc00b31l;
        H6 = 0x8eb44a8768581511l;
        H7 = 0xdb0c2e0d64f98fa7l;
        H8 = 0x47b5481dbefa4fa4l;
    }

    public Memoable copy()
    {
        return new SHA384Digest(this);
    }

    public void reset(Memoable other)
    {
        SHA384Digest d = (SHA384Digest)other;

        super.copyIn(d);
    }
}