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using System;
using Org.BouncyCastle.Crypto.Utilities;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Crypto.Digests
{
/**
* Draft FIPS 180-2 implementation of SHA-384. <b>Note:</b> As this is
* based on a draft this implementation is subject to change.
*
* <pre>
* block word digest
* SHA-1 512 32 160
* SHA-256 512 32 256
* SHA-384 1024 64 384
* SHA-512 1024 64 512
* </pre>
*/
public class Sha384Digest
: LongDigest
{
private const int DigestLength = 48;
public Sha384Digest()
{
}
/**
* Copy constructor. This will copy the state of the provided
* message digest.
*/
public Sha384Digest(
Sha384Digest t)
: base(t)
{
}
public override string AlgorithmName
{
get { return "SHA-384"; }
}
public override int GetDigestSize()
{
return DigestLength;
}
public override int DoFinal(
byte[] output,
int outOff)
{
Finish();
Pack.UInt64_To_BE(H1, output, outOff);
Pack.UInt64_To_BE(H2, output, outOff + 8);
Pack.UInt64_To_BE(H3, output, outOff + 16);
Pack.UInt64_To_BE(H4, output, outOff + 24);
Pack.UInt64_To_BE(H5, output, outOff + 32);
Pack.UInt64_To_BE(H6, output, outOff + 40);
Reset();
return DigestLength;
}
/**
* reset the chaining variables
*/
public override void Reset()
{
base.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 = 0xcbbb9d5dc1059ed8;
H2 = 0x629a292a367cd507;
H3 = 0x9159015a3070dd17;
H4 = 0x152fecd8f70e5939;
H5 = 0x67332667ffc00b31;
H6 = 0x8eb44a8768581511;
H7 = 0xdb0c2e0d64f98fa7;
H8 = 0x47b5481dbefa4fa4;
}
public override IMemoable Copy()
{
return new Sha384Digest(this);
}
public override void Reset(IMemoable other)
{
Sha384Digest d = (Sha384Digest)other;
CopyIn(d);
}
}
}
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