FileDocCategorySizeDatePackage
SHA512Digest.javaAPI DocAzureus 3.0.3.41789Tue Jun 08 05:12:58 BST 2004org.bouncycastle.crypto.digests

SHA512Digest

public class SHA512Digest extends LongDigest
Draft FIPS 180-2 implementation of SHA-512. Note: As this is based on a draft this implementation is subject to change. 
block word digest
SHA-1 512 32 160
SHA-256 512 32 256
SHA-384 1024 64 384
SHA-512 1024 64 512

Fields Summary
private static final int
DIGEST_LENGTH
Constructors Summary
public SHA512Digest()
Standard constructor
public SHA512Digest(SHA512Digest t)
Copy constructor. This will copy the state of the provided message digest.

		super(t);
Methods Summary
public intdoFinal(byte[] out, int outOff)

        finish();

        unpackWord(H1, out, outOff);
        unpackWord(H2, out, outOff + 8);
        unpackWord(H3, out, outOff + 16);
        unpackWord(H4, out, outOff + 24);
        unpackWord(H5, out, outOff + 32);
        unpackWord(H6, out, outOff + 40);
        unpackWord(H7, out, outOff + 48);
        unpackWord(H8, out, outOff + 56);

        reset();

        return DIGEST_LENGTH;
public java.lang.StringgetAlgorithmName()

        return "SHA-512";
public intgetDigestSize()

        return DIGEST_LENGTH;
public voidreset()
reset the chaining variables

        super.reset();

		/* SHA-512 initial hash value
		 * The first 64 bits of the fractional parts of the square roots
		 * of the first eight prime numbers
		 */
		H1 = 0x6a09e667f3bcc908l;
		H2 = 0xbb67ae8584caa73bl;
		H3 = 0x3c6ef372fe94f82bl;
		H4 = 0xa54ff53a5f1d36f1l;
		H5 = 0x510e527fade682d1l;
		H6 = 0x9b05688c2b3e6c1fl;
		H7 = 0x1f83d9abfb41bd6bl;
		H8 = 0x5be0cd19137e2179L;