1 files changed, 133 insertions, 0 deletions
diff --git a/Crypto/src/asn1/cms/PasswordRecipientInfo.cs b/Crypto/src/asn1/cms/PasswordRecipientInfo.cs
new file mode 100644
index 000000000..800b57951
--- /dev/null
+++ b/Crypto/src/asn1/cms/PasswordRecipientInfo.cs
@@ -0,0 +1,133 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Cms
+{
+ public class PasswordRecipientInfo
+ : Asn1Encodable
+ {
+ private readonly DerInteger version;
+ private readonly AlgorithmIdentifier keyDerivationAlgorithm;
+ private readonly AlgorithmIdentifier keyEncryptionAlgorithm;
+ private readonly Asn1OctetString encryptedKey;
+
+ public PasswordRecipientInfo(
+ AlgorithmIdentifier keyEncryptionAlgorithm,
+ Asn1OctetString encryptedKey)
+ {
+ this.version = new DerInteger(0);
+ this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
+ this.encryptedKey = encryptedKey;
+ }
+
+ public PasswordRecipientInfo(
+ AlgorithmIdentifier keyDerivationAlgorithm,
+ AlgorithmIdentifier keyEncryptionAlgorithm,
+ Asn1OctetString encryptedKey)
+ {
+ this.version = new DerInteger(0);
+ this.keyDerivationAlgorithm = keyDerivationAlgorithm;
+ this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
+ this.encryptedKey = encryptedKey;
+ }
+
+ public PasswordRecipientInfo(
+ Asn1Sequence seq)
+ {
+ version = (DerInteger) seq[0];
+
+ if (seq[1] is Asn1TaggedObject)
+ {
+ keyDerivationAlgorithm = AlgorithmIdentifier.GetInstance((Asn1TaggedObject) seq[1], false);
+ keyEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[2]);
+ encryptedKey = (Asn1OctetString) seq[3];
+ }
+ else
+ {
+ keyEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[1]);
+ encryptedKey = (Asn1OctetString) seq[2];
+ }
+ }
+
+ /**
+ * return a PasswordRecipientInfo 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 PasswordRecipientInfo GetInstance(
+ Asn1TaggedObject obj,
+ bool explicitly)
+ {
+ return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+ }
+
+ /**
+ * return a PasswordRecipientInfo object from the given object.
+ *
+ * @param obj the object we want converted.
+ * @exception ArgumentException if the object cannot be converted.
+ */
+ public static PasswordRecipientInfo GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is PasswordRecipientInfo)
+ return (PasswordRecipientInfo) obj;
+
+ if (obj is Asn1Sequence)
+ return new PasswordRecipientInfo((Asn1Sequence) obj);
+
+ throw new ArgumentException("Invalid PasswordRecipientInfo: " + obj.GetType().Name);
+ }
+
+ public DerInteger Version
+ {
+ get { return version; }
+ }
+
+ public AlgorithmIdentifier KeyDerivationAlgorithm
+ {
+ get { return keyDerivationAlgorithm; }
+ }
+
+ public AlgorithmIdentifier KeyEncryptionAlgorithm
+ {
+ get { return keyEncryptionAlgorithm; }
+ }
+
+ public Asn1OctetString EncryptedKey
+ {
+ get { return encryptedKey; }
+ }
+
+ /**
+ * Produce an object suitable for an Asn1OutputStream.
+ * <pre>
+ * PasswordRecipientInfo ::= Sequence {
+ * version CMSVersion, -- Always set to 0
+ * keyDerivationAlgorithm [0] KeyDerivationAlgorithmIdentifier
+ * OPTIONAL,
+ * keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
+ * encryptedKey EncryptedKey }
+ * </pre>
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector(version);
+
+ if (keyDerivationAlgorithm != null)
+ {
+ v.Add(new DerTaggedObject(false, 0, keyDerivationAlgorithm));
+ }
+
+ v.Add(keyEncryptionAlgorithm, encryptedKey);
+
+ return new DerSequence(v);
+ }
+ }
+}
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