1 files changed, 76 insertions, 0 deletions
diff --git a/crypto/src/asn1/tsp/EncryptionInfo.cs b/crypto/src/asn1/tsp/EncryptionInfo.cs
new file mode 100644
index 000000000..e712c6a00
--- /dev/null
+++ b/crypto/src/asn1/tsp/EncryptionInfo.cs
@@ -0,0 +1,76 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Tsp
+{
+    /**
+     * Implementation of the EncryptionInfo element defined in RFC 4998:
+     * <p>
+     * 1988 ASN.1 EncryptionInfo
+     * <p>
+     * EncryptionInfo       ::=     SEQUENCE {
+     * encryptionInfoType     OBJECT IDENTIFIER,
+     * encryptionInfoValue    ANY DEFINED BY encryptionInfoType
+     * }
+     * <p>
+     * 1997-ASN.1 EncryptionInfo
+     * <p>
+     * EncryptionInfo       ::=     SEQUENCE {
+     * encryptionInfoType   ENCINFO-TYPE.&amp;id
+     * ({SupportedEncryptionAlgorithms}),
+     * encryptionInfoValue  ENCINFO-TYPE.&amp;Type
+     * ({SupportedEncryptionAlgorithms}{&#064;encryptionInfoType})
+     * }
+     * <p>
+     * ENCINFO-TYPE ::= TYPE-IDENTIFIER
+     * <p>
+     * SupportedEncryptionAlgorithms ENCINFO-TYPE ::= {...}
+     */
+    public class EncryptionInfo
+        : Asn1Encodable
+    {
+        public static EncryptionInfo GetInstance(object obj)
+        {
+            if (obj == null)
+                return null;
+            if (obj is EncryptionInfo encryptionInfo)
+                return encryptionInfo;
+            return new EncryptionInfo(Asn1Sequence.GetInstance(obj));
+        }
+
+        public static EncryptionInfo GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
+        {
+            return new EncryptionInfo(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
+        }
+
+        /**
+         * The OID for EncryptionInfo type.
+         */
+        private readonly DerObjectIdentifier m_encryptionInfoType;
+
+        /**
+         * The value of EncryptionInfo
+         */
+        private readonly Asn1Encodable m_encryptionInfoValue;
+
+        private EncryptionInfo(Asn1Sequence sequence)
+        {
+            if (sequence.Count != 2)
+                throw new ArgumentException("wrong sequence size in constructor: " + sequence.Count, nameof(sequence));
+
+            m_encryptionInfoType = DerObjectIdentifier.GetInstance(sequence[0]);
+            m_encryptionInfoValue = sequence[1];
+        }
+
+        public EncryptionInfo(DerObjectIdentifier encryptionInfoType, Asn1Encodable encryptionInfoValue)
+        {
+            m_encryptionInfoType = encryptionInfoType;
+            m_encryptionInfoValue = encryptionInfoValue;
+        }
+
+        public virtual DerObjectIdentifier EncryptionInfoType => m_encryptionInfoType;
+
+        public virtual Asn1Encodable EncryptionInfoValue => m_encryptionInfoValue;
+
+        public override Asn1Object ToAsn1Object() => new DLSequence(m_encryptionInfoType, m_encryptionInfoValue);
+    }
+}