/// <summary>
/// Validate the current curve.
/// </summary>
/// <exception cref="CryptographicException">
/// if the curve parameters are not valid for the current CurveType.
/// </exception>
public void Validate()
{
if (IsNamed)
{
if (HasAnyExplicitParameters())
{
throw new CryptographicException(SR.Cryptography_InvalidECNamedCurve);
}
if (Oid == null ||
(string.IsNullOrEmpty(Oid.FriendlyName) && string.IsNullOrEmpty(Oid.Value)))
{
throw new CryptographicException(SR.Cryptography_InvalidCurveOid);
}
}
else if (IsExplicit)
{
bool hasErrors = false;
if (A == null ||
B == null || B.Length != A.Length ||
G.X == null || G.X.Length != A.Length ||
G.Y == null || G.Y.Length != A.Length ||
Order == null || Order.Length == 0 ||
Cofactor == null || Cofactor.Length == 0)
{
hasErrors = true;
}
if (IsPrime)
{
if (!hasErrors)
{
if (Prime == null || Prime.Length != A.Length)
{
hasErrors = true;
}
}
if (hasErrors)
{
throw new CryptographicException(SR.Cryptography_InvalidECPrimeCurve);
}
}
else if (IsCharacteristic2)
{
if (!hasErrors)
{
if (Polynomial == null || Polynomial.Length == 0)
{
hasErrors = true;
}
}
if (hasErrors)
{
throw new CryptographicException(SR.Cryptography_InvalidECCharacteristic2Curve);
}
}
}
else
{
// Implicit; if there are any values, throw
Debug.Assert(CurveType == ECCurveType.Implicit);
if (HasAnyExplicitParameters() || Oid != null)
{
throw new CryptographicException(SR.Format(SR.Cryptography_CurveNotSupported, CurveType.ToString()));
}
}
}
/// <summary>
/// Validate the current curve.
/// </summary>
/// <exception cref="CryptographicException">
/// The curve parameters are not valid for the current <see cref="CurveType"/>.
/// </exception>
public void Validate()
{
if (IsNamed)
{
if (HasAnyExplicitParameters())
{
throw new CryptographicException(CryptographicInvalidNamedCurve);
}
if (Oid == null || (string.IsNullOrEmpty(Oid.FriendlyName) && string.IsNullOrEmpty(Oid.Value)))
{
throw new CryptographicException(CryptographicInvalidCurveOid);
}
}
else if (IsExplicit)
{
bool hasErrors = HasCommonExplicitCurveErrors();
if (IsPrime)
{
if (!hasErrors)
{
if (Prime == null || Prime.Length != A.Length)
{
hasErrors = true;
}
}
if (hasErrors)
{
throw new CryptographicException(CryptographicInvalidPrimeCurve);
}
}
else if (IsCharacteristic2)
{
if (!hasErrors)
{
if (Polynomial == null || Polynomial.Length == 0)
{
hasErrors = true;
}
}
if (hasErrors)
{
throw new CryptographicException(CryptographicInvalidCharacteristic2Curve);
}
}
}
else
{
// Implicit; if there are any values, throw
if (HasAnyExplicitParameters() || Oid != null)
{
throw new CryptographicException(string.Format(Culture, CryptographicCurveNotSupported, CurveType.ToString()));
}
}
}