Parameters: asn1.NullRawValue,
			},
			MGF: pkix.AlgorithmIdentifier{
				Algorithm: oidMGF1,
			},
			SaltLength:   hashFunc.Size(),
			TrailerField: 1,
		}

		mgf1Params := pkix.AlgorithmIdentifier{
			Algorithm:  hashOID,
			Parameters: asn1.NullRawValue,
		}

		var err error
		params.MGF.Parameters.FullBytes, err = asn1.Marshal(mgf1Params)
		if err != nil {