1 files changed, 137 insertions, 0 deletions
diff --git a/Crypto/src/cms/CMSAuthenticatedData.cs b/Crypto/src/cms/CMSAuthenticatedData.cs
new file mode 100644
index 000000000..5e234da2b
--- /dev/null
+++ b/Crypto/src/cms/CMSAuthenticatedData.cs
@@ -0,0 +1,137 @@
+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.Utilities;
+
+namespace Org.BouncyCastle.Cms
+{
+ /**
+ * containing class for an CMS Authenticated Data object
+ */
+ public class CmsAuthenticatedData
+ {
+ internal RecipientInformationStore recipientInfoStore;
+ internal ContentInfo contentInfo;
+
+ private AlgorithmIdentifier macAlg;
+ private Asn1Set authAttrs;
+ private Asn1Set unauthAttrs;
+ private byte[] mac;
+
+ public CmsAuthenticatedData(
+ byte[] authData)
+ : this(CmsUtilities.ReadContentInfo(authData))
+ {
+ }
+
+ public CmsAuthenticatedData(
+ Stream authData)
+ : this(CmsUtilities.ReadContentInfo(authData))
+ {
+ }
+
+ public CmsAuthenticatedData(
+ ContentInfo contentInfo)
+ {
+ this.contentInfo = contentInfo;
+
+ AuthenticatedData authData = AuthenticatedData.GetInstance(contentInfo.Content);
+
+ //
+ // read the recipients
+ //
+ Asn1Set recipientInfos = authData.RecipientInfos;
+
+ this.macAlg = authData.MacAlgorithm;
+
+ //
+ // read the authenticated content info
+ //
+ ContentInfo encInfo = authData.EncapsulatedContentInfo;
+ CmsReadable readable = new CmsProcessableByteArray(
+ Asn1OctetString.GetInstance(encInfo.Content).GetOctets());
+ CmsSecureReadable secureReadable = new CmsEnvelopedHelper.CmsAuthenticatedSecureReadable(
+ this.macAlg, readable);
+
+ //
+ // build the RecipientInformationStore
+ //
+ this.recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore(
+ recipientInfos, secureReadable);
+
+ this.authAttrs = authData.AuthAttrs;
+ this.mac = authData.Mac.GetOctets();
+ this.unauthAttrs = authData.UnauthAttrs;
+ }
+
+ public byte[] GetMac()
+ {
+ return Arrays.Clone(mac);
+ }
+
+ public AlgorithmIdentifier MacAlgorithmID
+ {
+ get { return macAlg; }
+ }
+
+ /**
+ * return the object identifier for the content MAC algorithm.
+ */
+ public string MacAlgOid
+ {
+ get { return macAlg.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 digested attributes indexed by
+ * the OID of the attribute.
+ */
+ public Asn1.Cms.AttributeTable GetAuthAttrs()
+ {
+ if (authAttrs == null)
+ return null;
+
+ return new Asn1.Cms.AttributeTable(authAttrs);
+ }
+
+ /**
+ * return a table of the undigested attributes indexed by
+ * the OID of the attribute.
+ */
+ public Asn1.Cms.AttributeTable GetUnauthAttrs()
+ {
+ if (unauthAttrs == null)
+ return null;
+
+ return new Asn1.Cms.AttributeTable(unauthAttrs);
+ }
+
+ /**
+ * return the ASN.1 encoded representation of this object.
+ */
+ public byte[] GetEncoded()
+ {
+ return contentInfo.GetEncoded();
+ }
+ }
+}
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