1 files changed, 106 insertions, 0 deletions
diff --git a/Crypto/src/asn1/cms/KEKRecipientInfo.cs b/Crypto/src/asn1/cms/KEKRecipientInfo.cs
new file mode 100644
index 000000000..d847b50cc
--- /dev/null
+++ b/Crypto/src/asn1/cms/KEKRecipientInfo.cs
@@ -0,0 +1,106 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Cms
+{
+ public class KekRecipientInfo
+ : Asn1Encodable
+ {
+ private DerInteger version;
+ private KekIdentifier kekID;
+ private AlgorithmIdentifier keyEncryptionAlgorithm;
+ private Asn1OctetString encryptedKey;
+
+ public KekRecipientInfo(
+ KekIdentifier kekID,
+ AlgorithmIdentifier keyEncryptionAlgorithm,
+ Asn1OctetString encryptedKey)
+ {
+ this.version = new DerInteger(4);
+ this.kekID = kekID;
+ this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
+ this.encryptedKey = encryptedKey;
+ }
+
+ public KekRecipientInfo(
+ Asn1Sequence seq)
+ {
+ version = (DerInteger) seq[0];
+ kekID = KekIdentifier.GetInstance(seq[1]);
+ keyEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[2]);
+ encryptedKey = (Asn1OctetString) seq[3];
+ }
+
+ /**
+ * return a KekRecipientInfo object from a tagged object.
+ *
+ * @param obj the tagged object holding the object we want.
+ * @param explicitly true if the object is meant to be explicitly
+ * tagged false otherwise.
+ * @exception ArgumentException if the object held by the
+ * tagged object cannot be converted.
+ */
+ public static KekRecipientInfo GetInstance(
+ Asn1TaggedObject obj,
+ bool explicitly)
+ {
+ return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+ }
+
+ /**
+ * return a KekRecipientInfo object from the given object.
+ *
+ * @param obj the object we want converted.
+ * @exception ArgumentException if the object cannot be converted.
+ */
+ public static KekRecipientInfo GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is KekRecipientInfo)
+ return (KekRecipientInfo)obj;
+
+ if(obj is Asn1Sequence)
+ return new KekRecipientInfo((Asn1Sequence)obj);
+
+ throw new ArgumentException("Invalid KekRecipientInfo: " + obj.GetType().Name);
+ }
+
+ public DerInteger Version
+ {
+ get { return version; }
+ }
+
+ public KekIdentifier KekID
+ {
+ get { return kekID; }
+ }
+
+ public AlgorithmIdentifier KeyEncryptionAlgorithm
+ {
+ get { return keyEncryptionAlgorithm; }
+ }
+
+ public Asn1OctetString EncryptedKey
+ {
+ get { return encryptedKey; }
+ }
+
+ /**
+ * Produce an object suitable for an Asn1OutputStream.
+ * <pre>
+ * KekRecipientInfo ::= Sequence {
+ * version CMSVersion, -- always set to 4
+ * kekID KekIdentifier,
+ * keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
+ * encryptedKey EncryptedKey
+ * }
+ * </pre>
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ return new DerSequence(version, kekID, keyEncryptionAlgorithm, encryptedKey);
+ }
+ }
+}
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