SSH.NET/src/Renci.SshNet/Security/Cryptography/Hashes/SHA384Hash.cs

namespace Renci.SshNet.Security.Cryptography
{
    public class SHA384Hash : SHA2HashBase
    {
        private const int DIGEST_SIZE = 48;

        /// <summary>
        /// Gets the size, in bits, of the computed hash code.
        /// </summary>
        /// <returns>The size, in bits, of the computed hash code.</returns>
        public override int HashSize
        {
            get
            {
                return DIGEST_SIZE * 8;
            }
        }

        /// <summary>
        /// When overridden in a derived class, gets the input block size.
        /// </summary>
        /// <returns>The input block size.</returns>
        public override int InputBlockSize
        {
            get
            {
                return DIGEST_SIZE * 2;
            }
        }

        /// <summary>
        /// When overridden in a derived class, gets the output block size.
        /// </summary>
        /// <returns>The output block size.</returns>
        public override int OutputBlockSize
        {
            get
            {
                return DIGEST_SIZE * 2;
            }
        }

        protected override byte[] HashFinal()
        {
            var output = new byte[DIGEST_SIZE];

            this.Finish();

            SHA2HashBase.UInt64_To_BE(H1, output, 0);
            SHA2HashBase.UInt64_To_BE(H2, output, 8);
            SHA2HashBase.UInt64_To_BE(H3, output, 16);
            SHA2HashBase.UInt64_To_BE(H4, output, 24);
            SHA2HashBase.UInt64_To_BE(H5, output, 32);
            SHA2HashBase.UInt64_To_BE(H6, output, 40);

            this.Initialize();

            return output;
        }

        public override void Initialize()
        {
            base.Initialize();

            /* 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;
        }
    }
}