86 lines
2.1 KiB
C#
86 lines
2.1 KiB
C#
using System;
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namespace Org.BouncyCastle.Crypto.Digests
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{
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/**
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* Draft FIPS 180-2 implementation of SHA-384. <b>Note:</b> As this is
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* based on a draft this implementation is subject to change.
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*
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* <pre>
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* block word digest
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* SHA-1 512 32 160
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* SHA-256 512 32 256
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* SHA-384 1024 64 384
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* SHA-512 1024 64 512
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* </pre>
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*/
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public class Sha384Digest
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: LongDigest
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{
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private const int DigestLength = 48;
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public Sha384Digest()
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{
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}
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/**
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* Copy constructor. This will copy the state of the provided
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* message digest.
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*/
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public Sha384Digest(
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Sha384Digest t)
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: base(t)
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{
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}
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public override string AlgorithmName
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{
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get { return "SHA-384"; }
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}
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public override int GetDigestSize()
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{
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return DigestLength;
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}
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public override int DoFinal(
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byte[] output,
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int outOff)
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{
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Finish();
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UnpackWord(H1, output, outOff);
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UnpackWord(H2, output, outOff + 8);
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UnpackWord(H3, output, outOff + 16);
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UnpackWord(H4, output, outOff + 24);
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UnpackWord(H5, output, outOff + 32);
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UnpackWord(H6, output, outOff + 40);
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Reset();
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return DigestLength;
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}
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/**
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* reset the chaining variables
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*/
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public override void Reset()
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{
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base.Reset();
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/* SHA-384 initial hash value
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* The first 64 bits of the fractional parts of the square roots
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* of the 9th through 16th prime numbers
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*/
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H1 = unchecked((long) 0xcbbb9d5dc1059ed8L);
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H2 = unchecked((long) 0x629a292a367cd507L);
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H3 = unchecked((long) 0x9159015a3070dd17L);
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H4 = unchecked((long) 0x152fecd8f70e5939L);
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H5 = unchecked((long) 0x67332667ffc00b31L);
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H6 = unchecked((long) 0x8eb44a8768581511L);
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H7 = unchecked((long) 0xdb0c2e0d64f98fa7L);
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H8 = unchecked((long) 0x47b5481dbefa4fa4L);
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}
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}
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}
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