diff options
| -rw-r--r-- | crypto/src/asn1/Asn1Utilities.cs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/crypto/src/asn1/Asn1Utilities.cs b/crypto/src/asn1/Asn1Utilities.cs index 5605d4c54..6ccdfc43a 100644 --- a/crypto/src/asn1/Asn1Utilities.cs +++ b/crypto/src/asn1/Asn1Utilities.cs @@ -1,6 +1,8 @@ using System; using System.IO; +using Org.BouncyCastle.Utilities; + namespace Org.BouncyCastle.Asn1 { public abstract class Asn1Utilities @@ -29,6 +31,23 @@ namespace Org.BouncyCastle.Asn1 } + internal static TChoice GetInstanceFromChoice<TChoice>(Asn1TaggedObject taggedObject, bool declaredExplicit, + Func<object, TChoice> constructor) + where TChoice : Asn1Encodable, IAsn1Choice + { + if (!declaredExplicit) + { + var message = string.Format( + "Implicit tagging cannot be used with untagged choice type {0} (X.680 30.6, 30.8).", + Platform.GetTypeName(typeof(TChoice))); + + throw new ArgumentException(message, nameof(declaredExplicit)); + } + + return constructor(taggedObject.GetExplicitBaseObject()); + } + + internal static string GetTagText(Asn1Tag tag) { return GetTagText(tag.TagClass, tag.TagNo); |