1 files changed, 126 insertions, 0 deletions
diff --git a/crypto/src/cms/RecipientInformation.cs b/crypto/src/cms/RecipientInformation.cs
new file mode 100644
index 000000000..8b0316be4
--- /dev/null
+++ b/crypto/src/cms/RecipientInformation.cs
@@ -0,0 +1,126 @@
+using System;
+using System.IO;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Nist;
+using Org.BouncyCastle.Asn1.Pkcs;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Crypto.IO;
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Security;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Collections;
+
+namespace Org.BouncyCastle.Cms
+{
+ public abstract class RecipientInformation
+ {
+ internal RecipientID rid = new RecipientID();
+ internal AlgorithmIdentifier keyEncAlg;
+ internal CmsSecureReadable secureReadable;
+
+ private byte[] resultMac;
+
+ internal RecipientInformation(
+ AlgorithmIdentifier keyEncAlg,
+ CmsSecureReadable secureReadable)
+ {
+ this.keyEncAlg = keyEncAlg;
+ this.secureReadable = secureReadable;
+ }
+
+ internal string GetContentAlgorithmName()
+ {
+ AlgorithmIdentifier algorithm = secureReadable.Algorithm;
+// return CmsEnvelopedHelper.Instance.GetSymmetricCipherName(algorithm.ObjectID.Id);
+ return algorithm.ObjectID.Id;
+ }
+
+ public RecipientID RecipientID
+ {
+ get { return rid; }
+ }
+
+ public AlgorithmIdentifier KeyEncryptionAlgorithmID
+ {
+ get { return keyEncAlg; }
+ }
+
+ /**
+ * return the object identifier for the key encryption algorithm.
+ *
+ * @return OID for key encryption algorithm.
+ */
+ public string KeyEncryptionAlgOid
+ {
+ get { return keyEncAlg.ObjectID.Id; }
+ }
+
+ /**
+ * return the ASN.1 encoded key encryption algorithm parameters, or null if
+ * there aren't any.
+ *
+ * @return ASN.1 encoding of key encryption algorithm parameters.
+ */
+ public Asn1Object KeyEncryptionAlgParams
+ {
+ get
+ {
+ Asn1Encodable ae = keyEncAlg.Parameters;
+
+ return ae == null ? null : ae.ToAsn1Object();
+ }
+ }
+
+ internal CmsTypedStream GetContentFromSessionKey(
+ KeyParameter sKey)
+ {
+ CmsReadable readable = secureReadable.GetReadable(sKey);
+
+ try
+ {
+ return new CmsTypedStream(readable.GetInputStream());
+ }
+ catch (IOException e)
+ {
+ throw new CmsException("error getting .", e);
+ }
+ }
+
+ public byte[] GetContent(
+ ICipherParameters key)
+ {
+ try
+ {
+ return CmsUtilities.StreamToByteArray(GetContentStream(key).ContentStream);
+ }
+ catch (IOException e)
+ {
+ throw new Exception("unable to parse internal stream: " + e);
+ }
+ }
+
+ /**
+ * Return the MAC calculated for the content stream. Note: this call is only meaningful once all
+ * the content has been read.
+ *
+ * @return byte array containing the mac.
+ */
+ public byte[] GetMac()
+ {
+ if (resultMac == null)
+ {
+ object cryptoObject = secureReadable.CryptoObject;
+ if (cryptoObject is IMac)
+ {
+ resultMac = MacUtilities.DoFinal((IMac)cryptoObject);
+ }
+ }
+
+ return Arrays.Clone(resultMac);
+ }
+
+ public abstract CmsTypedStream GetContentStream(ICipherParameters key);
+ }
+}
|
