public static BCryptRsaKeyBlob Load(byte[] buffer)
{
BCryptRsaKeyBlob result = new BCryptRsaKeyBlob();
using (BinaryReader reader = new BinaryReader(new MemoryStream(buffer)))
{
result.Magic = reader.ReadUInt32();
result.BitLength = reader.ReadUInt32();
result.cbPublicExp = reader.ReadUInt32();
result.cbModulus = reader.ReadUInt32();
result.cbPrime1 = reader.ReadUInt32();
result.cbPrime2 = reader.ReadUInt32();
}
return(result);
}
public RSAParameters ExportParameters(bool includePrivateParameters)
{
#if WINDOWS_STORE
IBuffer export = keyPair.Export(CryptographicPrivateKeyBlobType.BCryptPrivateKey);
byte[] result;
CryptographicBuffer.CopyToByteArray(export, out result);
BCryptRsaKeyBlob header = BCryptRsaKeyBlob.Load(result);
int offset = Marshal.SizeOf <BCryptRsaKeyBlob>();
byte[] exponent = result.Skip(offset).Take((int)header.cbPublicExp).ToArray();
offset += (int)header.cbPublicExp;
byte[] modulus = result.Skip(offset).Take((int)header.cbModulus).ToArray();
return(new RSAParameters(exponent, modulus));
#else
System.Security.Cryptography.RSAParameters parameters =
provider.ExportParameters(includePrivateParameters);
return(new RSAParameters(parameters.Exponent, parameters.Modulus));
#endif
}
