added basic support for ASN.1 VideotexString

Author: Crypt32

Asn1Parser/Asn1Reader.cs

@@ -550,6 +550,8 @@ public Asn1Universal GetTagObject() {
                 return new Asn1PrintableString(this);
             case (Byte)Asn1Type.TeletexString:
                 return new Asn1TeletexString(this);
+            case (Byte)Asn1Type.VideotexString:
+                return new Asn1VideotexString(this);
             case (Byte)Asn1Type.IA5String:
                 return new Asn1IA5String(this);
             case (Byte)Asn1Type.UTCTime:

Asn1Parser/Universal/Asn1String.cs

@@ -91,7 +91,8 @@ public static Asn1String DecodeAnyString(Byte[] rawData, IEnumerable<Asn1Type> a
                 return new Asn1TeletexString(rawData);
             case Asn1Type.NumericString:
                 return new Asn1NumericString(rawData);
-
+            case Asn1Type.VideotexString:
+                return new Asn1VideotexString(rawData);
             default:
                 throw new Asn1InvalidTagException("Input data is not valid string.");
         }

Asn1Parser/Universal/Asn1VideotexString.cs

@@ -0,0 +1,61 @@
+using System;
+using System.IO;
+using System.Text;
+
+namespace SysadminsLV.Asn1Parser.Universal;
+/// <summary>
+/// Represents an ASN.1 <strong>VideotexString</strong> data type.
+/// The ASN.1 VideotexString type supports T.100/T.101 characters. This type is no longer used.
+/// </summary>
+public sealed class Asn1VideotexString : Asn1String {
+    const Asn1Type TYPE = Asn1Type.VideotexString;
+
+    /// <summary>
+    /// Initializes a new instance of the <strong>Asn1VideotexString</strong> class from an <see cref="Asn1Reader"/>
+    /// object.
+    /// </summary>
+    /// <param name="asn">Existing <see cref="Asn1Reader"/> object.</param>
+    /// <exception cref="Asn1InvalidTagException">
+    /// Current position in the <strong>ASN.1</strong> object is not <strong>VideotexString</strong> data type.
+    /// </exception>
+    /// <exception cref="InvalidDataException">
+    /// Input data contains invalid VideotexString character.
+    /// </exception>
+    public Asn1VideotexString(Asn1Reader asn) : base(asn, TYPE) {
+        decode(asn);
+    }
+    /// <summary>
+    /// Initializes a new instance of <strong>Asn1VideotexString</strong> from a ASN.1-encoded byte array.
+    /// </summary>
+    /// <param name="rawData">ASN.1-encoded byte array.</param>
+    /// <exception cref="Asn1InvalidTagException">
+    /// <strong>rawData</strong> is not <strong>VideotexString</strong> data type.
+    /// </exception>
+    /// <exception cref="InvalidDataException">
+    /// Input data contains invalid VideotexString character.
+    /// </exception>
+    public Asn1VideotexString(Byte[] rawData) : this(new Asn1Reader(rawData)) { }
+    /// <summary>
+    /// Initializes a new instance of the <strong>Asn1VideotexString</strong> class from a unicode string.
+    /// </summary>
+    /// <param name="inputString">A unicode string to encode.</param>
+    /// <exception cref="InvalidDataException">
+    /// <strong>inputString</strong> contains invalid VideotexString characters
+    /// </exception>
+    public Asn1VideotexString(String inputString) : base(TYPE) {
+        encode(inputString);
+    }
+
+    void encode(String inputString) {
+        Initialize(new Asn1Reader(Asn1Utils.Encode(Encoding.ASCII.GetBytes(inputString), TYPE)));
+        Value = inputString;
+    }
+    void decode(Asn1Reader asn) {
+        Value = Encoding.ASCII.GetString(asn.GetPayload());
+    }
+
+    /// <inheritdoc/>
+    public override String GetDisplayValue() {
+        return Value;
+    }
+}