1 files changed, 115 insertions, 0 deletions
diff --git a/Crypto/src/cms/CMSEnvelopedData.cs b/Crypto/src/cms/CMSEnvelopedData.cs
new file mode 100644
index 000000000..0731c307e
--- /dev/null
+++ b/Crypto/src/cms/CMSEnvelopedData.cs
@@ -0,0 +1,115 @@
+using System;
+using System.Collections;
+using System.IO;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Cms;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Cms
+{
+ /**
+ * containing class for an CMS Enveloped Data object
+ */
+ public class CmsEnvelopedData
+ {
+ internal RecipientInformationStore recipientInfoStore;
+ internal ContentInfo contentInfo;
+
+ private AlgorithmIdentifier encAlg;
+ private Asn1Set unprotectedAttributes;
+
+ public CmsEnvelopedData(
+ byte[] envelopedData)
+ : this(CmsUtilities.ReadContentInfo(envelopedData))
+ {
+ }
+
+ public CmsEnvelopedData(
+ Stream envelopedData)
+ : this(CmsUtilities.ReadContentInfo(envelopedData))
+ {
+ }
+
+ public CmsEnvelopedData(
+ ContentInfo contentInfo)
+ {
+ this.contentInfo = contentInfo;
+
+ EnvelopedData envData = EnvelopedData.GetInstance(contentInfo.Content);
+
+ //
+ // read the recipients
+ //
+ Asn1Set recipientInfos = envData.RecipientInfos;
+
+ //
+ // read the encrypted content info
+ //
+ EncryptedContentInfo encInfo = envData.EncryptedContentInfo;
+ this.encAlg = encInfo.ContentEncryptionAlgorithm;
+ CmsReadable readable = new CmsProcessableByteArray(encInfo.EncryptedContent.GetOctets());
+ CmsSecureReadable secureReadable = new CmsEnvelopedHelper.CmsEnvelopedSecureReadable(
+ this.encAlg, readable);
+
+ //
+ // build the RecipientInformationStore
+ //
+ this.recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore(
+ recipientInfos, secureReadable);
+
+ this.unprotectedAttributes = envData.UnprotectedAttrs;
+ }
+
+ public AlgorithmIdentifier EncryptionAlgorithmID
+ {
+ get { return encAlg; }
+ }
+
+ /**
+ * return the object identifier for the content encryption algorithm.
+ */
+ public string EncryptionAlgOid
+ {
+ get { return encAlg.ObjectID.Id; }
+ }
+
+ /**
+ * return a store of the intended recipients for this message
+ */
+ public RecipientInformationStore GetRecipientInfos()
+ {
+ return recipientInfoStore;
+ }
+
+ /**
+ * return the ContentInfo
+ */
+ public ContentInfo ContentInfo
+ {
+ get { return contentInfo; }
+ }
+
+ /**
+ * return a table of the unprotected attributes indexed by
+ * the OID of the attribute.
+ */
+ public Asn1.Cms.AttributeTable GetUnprotectedAttributes()
+ {
+ if (unprotectedAttributes == null)
+ return null;
+
+ return new Asn1.Cms.AttributeTable(unprotectedAttributes);
+ }
+
+ /**
+ * return the ASN.1 encoded representation of this object.
+ */
+ public byte[] GetEncoded()
+ {
+ return contentInfo.GetEncoded();
+ }
+ }
+}
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