1 files changed, 154 insertions, 0 deletions
diff --git a/crypto/src/asn1/crmf/EncryptedValue.cs b/crypto/src/asn1/crmf/EncryptedValue.cs
new file mode 100644
index 000000000..83122e220
--- /dev/null
+++ b/crypto/src/asn1/crmf/EncryptedValue.cs
@@ -0,0 +1,154 @@
+using System;
+
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Crmf
+{
+    public class EncryptedValue
+        : Asn1Encodable
+    {
+        private readonly AlgorithmIdentifier intendedAlg;
+        private readonly AlgorithmIdentifier symmAlg;
+        private readonly DerBitString encSymmKey;
+        private readonly AlgorithmIdentifier keyAlg;
+        private readonly Asn1OctetString valueHint;
+        private readonly DerBitString encValue;
+
+        private EncryptedValue(Asn1Sequence seq)
+        {
+            int index = 0;
+            while (seq[index] is Asn1TaggedObject)
+            {
+                Asn1TaggedObject tObj = (Asn1TaggedObject)seq[index];
+
+                switch (tObj.TagNo)
+                {
+                    case 0:
+                        intendedAlg = AlgorithmIdentifier.GetInstance(tObj, false);
+                        break;
+                    case 1:
+                        symmAlg = AlgorithmIdentifier.GetInstance(tObj, false);
+                        break;
+                    case 2:
+                        encSymmKey = DerBitString.GetInstance(tObj, false);
+                        break;
+                    case 3:
+                        keyAlg = AlgorithmIdentifier.GetInstance(tObj, false);
+                        break;
+                    case 4:
+                        valueHint = Asn1OctetString.GetInstance(tObj, false);
+                        break;
+                }
+                ++index;
+            }
+
+            encValue = DerBitString.GetInstance(seq[index]);
+        }
+
+        public static EncryptedValue GetInstance(object obj)
+        {
+            if (obj is EncryptedValue)
+                return (EncryptedValue)obj;
+
+            if (obj != null)
+                return new EncryptedValue(Asn1Sequence.GetInstance(obj));
+
+            return null;
+        }
+
+        public EncryptedValue(
+            AlgorithmIdentifier intendedAlg,
+            AlgorithmIdentifier symmAlg,
+            DerBitString encSymmKey,
+            AlgorithmIdentifier keyAlg,
+            Asn1OctetString valueHint,
+            DerBitString encValue)
+        {
+            if (encValue == null)
+            {
+                throw new ArgumentNullException("encValue");
+            }
+
+            this.intendedAlg = intendedAlg;
+            this.symmAlg = symmAlg;
+            this.encSymmKey = encSymmKey;
+            this.keyAlg = keyAlg;
+            this.valueHint = valueHint;
+            this.encValue = encValue;
+        }
+
+        public virtual AlgorithmIdentifier IntendedAlg
+        {
+            get { return intendedAlg; }
+        }
+
+        public virtual AlgorithmIdentifier SymmAlg
+        {
+            get { return symmAlg; }
+        }
+
+        public virtual DerBitString EncSymmKey
+        {
+            get { return encSymmKey; }
+        }
+
+        public virtual AlgorithmIdentifier KeyAlg
+        {
+            get { return keyAlg; }
+        }
+
+        public virtual Asn1OctetString ValueHint
+        {
+            get { return valueHint; }
+        }
+
+        public virtual DerBitString EncValue
+        {
+            get { return encValue; }
+        }
+
+        /**
+         * <pre>
+         * EncryptedValue ::= SEQUENCE {
+         *                     intendedAlg   [0] AlgorithmIdentifier  OPTIONAL,
+         *                     -- the intended algorithm for which the value will be used
+         *                     symmAlg       [1] AlgorithmIdentifier  OPTIONAL,
+         *                     -- the symmetric algorithm used to encrypt the value
+         *                     encSymmKey    [2] BIT STRING           OPTIONAL,
+         *                     -- the (encrypted) symmetric key used to encrypt the value
+         *                     keyAlg        [3] AlgorithmIdentifier  OPTIONAL,
+         *                     -- algorithm used to encrypt the symmetric key
+         *                     valueHint     [4] OCTET STRING         OPTIONAL,
+         *                     -- a brief description or identifier of the encValue content
+         *                     -- (may be meaningful only to the sending entity, and used only
+         *                     -- if EncryptedValue might be re-examined by the sending entity
+         *                     -- in the future)
+         *                     encValue       BIT STRING }
+         *                     -- the encrypted value itself
+         * </pre>
+         * @return a basic ASN.1 object representation.
+         */
+        public override Asn1Object ToAsn1Object()
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector();
+
+            AddOptional(v, 0, intendedAlg);
+            AddOptional(v, 1, symmAlg);
+            AddOptional(v, 2, encSymmKey);
+            AddOptional(v, 3, keyAlg);
+            AddOptional(v, 4, valueHint);
+
+            v.Add(encValue);
+
+            return new DerSequence(v);
+        }
+
+        private void AddOptional(Asn1EncodableVector v, int tagNo, Asn1Encodable obj)
+        {
+            if (obj != null)
+            {
+                v.Add(new DerTaggedObject(false, tagNo, obj));
+            }
+        }
+    }
+}