1 files changed, 92 insertions, 0 deletions
diff --git a/Crypto/src/asn1/ess/ContentHints.cs b/Crypto/src/asn1/ess/ContentHints.cs
new file mode 100644
index 000000000..a430fea8d
--- /dev/null
+++ b/Crypto/src/asn1/ess/ContentHints.cs
@@ -0,0 +1,92 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Ess
+{
+ public class ContentHints
+ : Asn1Encodable
+ {
+ private readonly DerUtf8String contentDescription;
+ private readonly DerObjectIdentifier contentType;
+
+ public static ContentHints GetInstance(
+ object o)
+ {
+ if (o == null || o is ContentHints)
+ {
+ return (ContentHints)o;
+ }
+
+ if (o is Asn1Sequence)
+ {
+ return new ContentHints((Asn1Sequence)o);
+ }
+
+ throw new ArgumentException("unknown object in 'ContentHints' factory : "
+ + o.GetType().Name + ".");
+ }
+
+ /**
+ * constructor
+ */
+ private ContentHints(
+ Asn1Sequence seq)
+ {
+ IAsn1Convertible field = seq[0];
+ if (field.ToAsn1Object() is DerUtf8String)
+ {
+ contentDescription = DerUtf8String.GetInstance(field);
+ contentType = DerObjectIdentifier.GetInstance(seq[1]);
+ }
+ else
+ {
+ contentType = DerObjectIdentifier.GetInstance(seq[0]);
+ }
+ }
+
+ public ContentHints(
+ DerObjectIdentifier contentType)
+ {
+ this.contentType = contentType;
+ this.contentDescription = null;
+ }
+
+ public ContentHints(
+ DerObjectIdentifier contentType,
+ DerUtf8String contentDescription)
+ {
+ this.contentType = contentType;
+ this.contentDescription = contentDescription;
+ }
+
+ public DerObjectIdentifier ContentType
+ {
+ get { return contentType; }
+ }
+
+ public DerUtf8String ContentDescription
+ {
+ get { return contentDescription; }
+ }
+
+ /**
+ * <pre>
+ * ContentHints ::= SEQUENCE {
+ * contentDescription UTF8String (SIZE (1..MAX)) OPTIONAL,
+ * contentType ContentType }
+ * </pre>
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector();
+
+ if (contentDescription != null)
+ {
+ v.Add(contentDescription);
+ }
+
+ v.Add(contentType);
+
+ return new DerSequence(v);
+ }
+ }
+}
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