DirectoryStringAsn.cs

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using System.Formats.Asn1;
 
namespace System.Security.Cryptography.Asn1;
 
internal struct DirectoryStringAsn
{
    internal string TeletexString;
 
    internal string PrintableString;
 
    internal ReadOnlyMemory<byte>? UniversalString;
 
    internal string Utf8String;
 
    internal string BmpString;
 
    internal void Encode(AsnWriter writer)
    {
        bool flag = false;
        if (TeletexString != null)
        {
            if (flag)
            {
                throw new CryptographicException();
            }
            writer.WriteCharacterString(UniversalTagNumber.TeletexString, TeletexString);
            flag = true;
        }
        if (PrintableString != null)
        {
            if (flag)
            {
                throw new CryptographicException();
            }
            writer.WriteCharacterString(UniversalTagNumber.PrintableString, PrintableString);
            flag = true;
        }
        if (UniversalString.HasValue)
        {
            if (flag)
            {
                throw new CryptographicException();
            }
            if (!Asn1Tag.TryDecode(UniversalString.Value.Span, out var tag, out var _) || !tag.HasSameClassAndValue(new Asn1Tag(UniversalTagNumber.UniversalString)))
            {
                throw new CryptographicException();
            }
            try
            {
                writer.WriteEncodedValue(UniversalString.Value.Span);
            }
            catch (ArgumentException inner)
            {
                throw new CryptographicException(System.SR.Cryptography_Der_Invalid_Encoding, inner);
            }
            flag = true;
        }
        if (Utf8String != null)
        {
            if (flag)
            {
                throw new CryptographicException();
            }
            writer.WriteCharacterString(UniversalTagNumber.UTF8String, Utf8String);
            flag = true;
        }
        if (BmpString != null)
        {
            if (flag)
            {
                throw new CryptographicException();
            }
            writer.WriteCharacterString(UniversalTagNumber.BMPString, BmpString);
            flag = true;
        }
        if (!flag)
        {
            throw new CryptographicException();
        }
    }
}