/// <summary>
/// Initializes a new instance of the <see cref="ECDsaAdapter"/> class.
/// </summary>
/// <exception cref="PlatformNotSupportedException">
/// <see cref="ECDsa"/> creation is not supported by some platforms.
/// For more details, see https://aka.ms/IdentityModel/create-ecdsa.
/// </exception>
internal ECDsaAdapter()
{
#if NETSTANDARD2_0
if (SupportsECParameters())
{
CreateECDsaFunction = CreateECDsaUsingECParams;
}
else
{
CreateECDsaFunction = CreateECDsaUsingCNGKey;
}
#elif DESKTOP
CreateECDsaFunction = CreateECDsaUsingCNGKey;
#endif
}
/// <summary>
/// Initializes a new instance of the <see cref="ECDsaAdapter"/> class.
/// </summary>
/// <exception cref="PlatformNotSupportedException">
/// <see cref="ECDsa"/> creation is not supported by some platforms.
/// For more details, see https://aka.ms/IdentityModel/create-ecdsa.
/// </exception>
internal ECDsaAdapter()
{
#if NET472
CreateECDsaFunction = CreateECDsaUsingECParams;
#elif NETSTANDARD2_0
// Although NETSTANDARD2_0 specifies that ECParameters are supported, we still need to call SupportsECParameters()
// as NET461 is listed as supporting NETSTANDARD2_0, but DOES NOT support ECParameters.
// See: https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.ecparameters?view=netstandard-2.0
if (SupportsECParameters())
{
CreateECDsaFunction = CreateECDsaUsingECParams;
}
else
{
CreateECDsaFunction = CreateECDsaUsingCNGKey;
}
#else
CreateECDsaFunction = CreateECDsaUsingCNGKey;
#endif
}
/// <summary>
/// Initializes a new instance of the <see cref="ECDsaAdapter"/> class.
/// </summary>
/// <exception cref="PlatformNotSupportedException">
/// <see cref="ECDsa"/> creation is not supported by NETSTANDARD1.4, when running on platforms other than Windows.
/// For more details, see https://aka.ms/IdentityModel/create-ecdsa.
/// </exception>
internal ECDsaAdapter()
{
#if NETSTANDARD2_0
if (SupportsECParameters())
{
CreateECDsaFunction = CreateECDsaUsingECParams;
}
else
{
CreateECDsaFunction = CreateECDsaUsingCNGKey;
}
#elif NETSTANDARD1_4
if (SupportsCNGKey())
{
CreateECDsaFunction = CreateECDsaUsingCNGKey;
}
else
{
throw LogHelper.LogExceptionMessage(new PlatformNotSupportedException(LogMessages.IDX10690));
}
#elif DESKTOP
CreateECDsaFunction = CreateECDsaUsingCNGKey;
#endif
}
