public EcKeyCreateOptions(KeyCurveName curve, List <KeyOperations> keyOps, DateTimeOffset?notBefore, DateTimeOffset?expires, Dictionary <string, string> tags)
{
Curve = curve;
KeyOperations = keyOps;
KeyType = KeyType.EllipticCurve;
NotBefore = notBefore;
Expires = expires;
Tags = new Dictionary <string, string>(tags);
}
private ECDsa Convert(bool includePrivateParameters, bool throwIfNotSupported)
{
if (!CurveName.HasValue)
{
if (throwIfNotSupported)
{
throw new InvalidOperationException("missing required curve name");
}
return(null);
}
KeyCurveName curveName = CurveName.Value;
int requiredParameterSize = curveName.KeyParameterSize;
if (requiredParameterSize <= 0)
{
if (throwIfNotSupported)
{
throw new InvalidOperationException($"invalid curve name: {CurveName.ToString()}");
}
return(null);
}
ECParameters ecParameters = new ECParameters
{
Curve = ECCurve.CreateFromOid(curveName.Oid),
Q = new ECPoint
{
X = ForceBufferLength(nameof(X), X, requiredParameterSize),
Y = ForceBufferLength(nameof(Y), Y, requiredParameterSize),
},
};
if (includePrivateParameters && HasPrivateKey)
{
ecParameters.D = ForceBufferLength(nameof(D), D, requiredParameterSize);
}
ECDsa ecdsa = ECDsa.Create();
try
{
ecdsa.ImportParameters(ecParameters);
}
catch when(!throwIfNotSupported)
{
ecdsa.Dispose();
return(null);
}
return(ecdsa);
}
private void Initialize(ECDsa ecdsa, bool includePrivateParameters)
{
KeyType = KeyType.Ec;
ECParameters ecParameters = ecdsa.ExportParameters(includePrivateParameters);
CurveName = KeyCurveName.FromOid(ecParameters.Curve.Oid, ecdsa.KeySize).ToString() ?? throw new InvalidOperationException("elliptic curve name is invalid");
D = ecParameters.D;
X = ecParameters.Q.X;
Y = ecParameters.Q.Y;
}
internal static string AsString(KeyCurveName curve)
{
switch (curve)
{
case KeyCurveName.P256:
return("P-256");
case KeyCurveName.P256K:
return("P-256K");
case KeyCurveName.P384:
return("P-384");
case KeyCurveName.P521:
return("P-521");
default:
return(string.Empty);
}
}
