private void ResolveAsymmetricAlgorithm(SecurityKey key, string algorithm, bool willCreateSignatures)
{
if (key == null)
{
throw LogHelper.LogArgumentNullException("key");
}
if (string.IsNullOrWhiteSpace(algorithm))
{
throw LogHelper.LogArgumentNullException("algorithm");
}
_hashAlgorithm = GetHashAlgorithmString(algorithm);
RsaAlgorithm rsaAlgorithm = Utility.ResolveRsaAlgorithm(key, algorithm, willCreateSignatures);
if (rsaAlgorithm != null)
{
if (rsaAlgorithm.rsaCryptoServiceProvider != null)
{
_rsaCryptoServiceProvider = rsaAlgorithm.rsaCryptoServiceProvider;
_disposeRsa = rsaAlgorithm.dispose;
return;
}
else if (rsaAlgorithm.rsaCryptoServiceProviderProxy != null)
{
_rsaCryptoServiceProviderProxy = rsaAlgorithm.rsaCryptoServiceProviderProxy;
_disposeRsa = rsaAlgorithm.dispose;
return;
}
else
{
throw LogHelper.LogExceptionMessage(new NotSupportedException(LogHelper.FormatInvariant(LogMessages.IDX10641, key)));
}
}
ECDsaAlgorithm ecdsaAlgorithm = Utility.ResolveECDsaAlgorithm(key, algorithm, willCreateSignatures);
if (ecdsaAlgorithm != null && ecdsaAlgorithm.ecdsaCng != null)
{
_ecdsa = ecdsaAlgorithm.ecdsaCng;
_ecdsa.HashAlgorithm = new CngAlgorithm(_hashAlgorithm);
_disposeEcdsa = ecdsaAlgorithm.dispose;
return;
}
throw LogHelper.LogExceptionMessage(new NotSupportedException(LogHelper.FormatInvariant(LogMessages.IDX10641, key)));
}
internal static ECDsaAlgorithm ResolveECDsaAlgorithm(SecurityKey key, string algorithm, bool usePrivateKey)
{
if (key == null)
{
return(null);
}
var ecdsaAlgorithm = new ECDsaAlgorithm();
var ecdsaKey = key as ECDsaSecurityKey;
if (ecdsaKey != null)
{
#if NETSTANDARD1_4
if (ecdsaKey.ECDsa != null && ValidateECDSAKeySize(ecdsaKey.ECDsa.KeySize, algorithm))
{
ecdsaAlgorithm.ecdsa = ecdsaKey.ECDsa;
return(ecdsaAlgorithm);
}
#else // net451 windows
if (ecdsaKey.ECDsa != null && ValidateECDSAKeySize(ecdsaKey.ECDsa.KeySize, algorithm))
{
ecdsaAlgorithm.ecdsaCng = ecdsaKey.ECDsa as ECDsaCng;
return(ecdsaAlgorithm);
}
#endif
}
var webKey = key as JsonWebKey;
if (webKey != null && webKey.Kty == JsonWebAlgorithmsKeyTypes.EllipticCurve)
{
ecdsaAlgorithm.dispose = true;
#if NETSTANDARD1_4
ecdsaAlgorithm.ecdsa = webKey.CreateECDsa(algorithm, usePrivateKey);
#else // net451 windows
ecdsaAlgorithm.ecdsaCng = webKey.CreateECDsa(algorithm, usePrivateKey);
#endif
return(ecdsaAlgorithm);
}
return(null);
}