Org.BouncyCastle.Crypto.Signers.PssSigner.Init C# (CSharp) Method

		public virtual void Init(
			bool				forSigning,
			ICipherParameters	parameters)
		{
			if (parameters is ParametersWithRandom)
			{
				ParametersWithRandom p = (ParametersWithRandom) parameters;

				parameters = p.Parameters;
				random = p.Random;
			}
			else
			{
				if (forSigning)
				{
					random = new SecureRandom();
				}
			}

			cipher.Init(forSigning, parameters);

			RsaKeyParameters kParam;
			if (parameters is RsaBlindingParameters)
			{
				kParam = ((RsaBlindingParameters) parameters).PublicKey;
			}
			else
			{
				kParam = (RsaKeyParameters) parameters;
			}

			emBits = kParam.Modulus.BitLength - 1;

			if (emBits < (8 * hLen + 8 * sLen + 9))
				throw new ArgumentException("key too small for specified hash and salt lengths");

			block = new byte[(emBits + 7) / 8];
		}

        private void doTestSig(
			int					id,
			RsaKeyParameters	pub,
			RsaKeyParameters	prv,
			byte[]				slt,
			byte[]				msg,
			byte[]				sig)
        {
            PssSigner eng = new PssSigner(new RsaEngine(), new Sha1Digest(), 20);

            eng.Init(true, new ParametersWithRandom(prv, new FixedRandom(slt)));

            eng.BlockUpdate(msg, 0, msg.Length);

            byte[] s = eng.GenerateSignature();

            if (!AreEqual(s, sig))
            {
                Fail("test " + id + " failed generation");
            }

            eng.Init(false, pub);

            eng.BlockUpdate(msg, 0, msg.Length);

            if (!eng.VerifySignature(s))
            {
                Fail("test " + id + " failed verification");
            }
        }