/**
* initialise the ElGamal engine.
*
* @param forEncryption true if we are encrypting, false otherwise.
* @param param the necessary ElGamal key parameters.
*/
public void Init(
bool forEncryption,
ICipherParameters parameters)
{
if (parameters is ParametersWithRandom)
{
ParametersWithRandom p = (ParametersWithRandom)parameters;
this.key = (ElGamalKeyParameters)p.Parameters;
this.random = p.Random;
}
else
{
this.key = (ElGamalKeyParameters)parameters;
this.random = new SecureRandom();
}
this.forEncryption = forEncryption;
this.bitSize = key.Parameters.P.BitLength;
if (forEncryption)
{
if (!(key is ElGamalPublicKeyParameters))
{
throw new ArgumentException("ElGamalPublicKeyParameters are required for encryption.");
}
}
else
{
if (!(key is ElGamalPrivateKeyParameters))
{
throw new ArgumentException("ElGamalPrivateKeyParameters are required for decryption.");
}
}
}
public virtual void Init(bool forEncryption, ICipherParameters parameters)
{
//IL_007c: Unknown result type (might be due to invalid IL or missing references)
//IL_0094: Unknown result type (might be due to invalid IL or missing references)
if (parameters is ParametersWithRandom)
{
ParametersWithRandom parametersWithRandom = (ParametersWithRandom)parameters;
key = (ElGamalKeyParameters)parametersWithRandom.Parameters;
random = parametersWithRandom.Random;
}
else
{
key = (ElGamalKeyParameters)parameters;
random = new SecureRandom();
}
this.forEncryption = forEncryption;
bitSize = key.Parameters.P.BitLength;
if (forEncryption)
{
if (!(key is ElGamalPublicKeyParameters))
{
throw new ArgumentException("ElGamalPublicKeyParameters are required for encryption.");
}
}
else if (!(key is ElGamalPrivateKeyParameters))
{
throw new ArgumentException("ElGamalPrivateKeyParameters are required for decryption.");
}
}
protected bool Equals(ElGamalKeyParameters other)
{
if (object.Equals(parameters, other.parameters))
{
return(Equals((AsymmetricKeyParameter)other));
}
return(false);
}
public override bool Equals(object obj)
{
if (obj == this)
{
return(true);
}
ElGamalKeyParameters elGamalKeyParameters = obj as ElGamalKeyParameters;
if (elGamalKeyParameters == null)
{
return(false);
}
return(Equals(elGamalKeyParameters));
}
/**
* initialise the ElGamal engine.
*
* @param forEncryption true if we are encrypting, false otherwise.
* @param param the necessary ElGamal key parameters.
*/
public void init(
bool forEncryption,
CipherParameters param)
{
if (typeof(ParametersWithRandom).IsInstanceOfType(param))
{
ParametersWithRandom p = (ParametersWithRandom)param;
this.key = (ElGamalKeyParameters)p.getParameters();
this.random = p.getRandom();
}
else
{
this.key = (ElGamalKeyParameters)param;
this.random = new SecureRandom();
}
this.forEncryption = forEncryption;
}
