/// <summary>Extracts the binary data from a PEM file.</summary>
internal static byte[] GetDERFromPEM(string sPEM)
{
UInt32 dwSkip, dwFlags;
UInt32 dwBinarySize = 0;
if (!RSACryptoServiceProviderExtension.CryptStringToBinary(sPEM, (UInt32)sPEM.Length, CRYPT_STRING_FLAGS.CRYPT_STRING_BASE64HEADER, null, ref dwBinarySize, out dwSkip, out dwFlags))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
byte[] decodedData = new byte[dwBinarySize];
if (!RSACryptoServiceProviderExtension.CryptStringToBinary(sPEM, (UInt32)sPEM.Length, CRYPT_STRING_FLAGS.CRYPT_STRING_BASE64HEADER, decodedData, ref dwBinarySize, out dwSkip, out dwFlags))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
return(decodedData);
}
