1 files changed, 145 insertions, 0 deletions
diff --git a/Crypto/src/asn1/cms/AuthEnvelopedDataParser.cs b/Crypto/src/asn1/cms/AuthEnvelopedDataParser.cs
new file mode 100644
index 000000000..35cb3bfcc
--- /dev/null
+++ b/Crypto/src/asn1/cms/AuthEnvelopedDataParser.cs
@@ -0,0 +1,145 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Cms
+{
+ /**
+ * Produce an object suitable for an Asn1OutputStream.
+ *
+ * <pre>
+ * AuthEnvelopedData ::= SEQUENCE {
+ * version CMSVersion,
+ * originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL,
+ * recipientInfos RecipientInfos,
+ * authEncryptedContentInfo EncryptedContentInfo,
+ * authAttrs [1] IMPLICIT AuthAttributes OPTIONAL,
+ * mac MessageAuthenticationCode,
+ * unauthAttrs [2] IMPLICIT UnauthAttributes OPTIONAL }
+ * </pre>
+ */
+ public class AuthEnvelopedDataParser
+ {
+ private Asn1SequenceParser seq;
+ private DerInteger version;
+ private IAsn1Convertible nextObject;
+ private bool originatorInfoCalled;
+
+ public AuthEnvelopedDataParser(
+ Asn1SequenceParser seq)
+ {
+ this.seq = seq;
+
+ // TODO
+ // "It MUST be set to 0."
+ this.version = (DerInteger)seq.ReadObject();
+ }
+
+ public DerInteger Version
+ {
+ get { return version; }
+ }
+
+ public OriginatorInfo GetOriginatorInfo()
+ {
+ originatorInfoCalled = true;
+
+ if (nextObject == null)
+ {
+ nextObject = seq.ReadObject();
+ }
+
+ if (nextObject is Asn1TaggedObjectParser && ((Asn1TaggedObjectParser)nextObject).TagNo == 0)
+ {
+ Asn1SequenceParser originatorInfo = (Asn1SequenceParser) ((Asn1TaggedObjectParser)nextObject).GetObjectParser(Asn1Tags.Sequence, false);
+ nextObject = null;
+ return OriginatorInfo.GetInstance(originatorInfo.ToAsn1Object());
+ }
+
+ return null;
+ }
+
+ public Asn1SetParser GetRecipientInfos()
+ {
+ if (!originatorInfoCalled)
+ {
+ GetOriginatorInfo();
+ }
+
+ if (nextObject == null)
+ {
+ nextObject = seq.ReadObject();
+ }
+
+ Asn1SetParser recipientInfos = (Asn1SetParser)nextObject;
+ nextObject = null;
+ return recipientInfos;
+ }
+
+ public EncryptedContentInfoParser GetAuthEncryptedContentInfo()
+ {
+ if (nextObject == null)
+ {
+ nextObject = seq.ReadObject();
+ }
+
+ if (nextObject != null)
+ {
+ Asn1SequenceParser o = (Asn1SequenceParser) nextObject;
+ nextObject = null;
+ return new EncryptedContentInfoParser(o);
+ }
+
+ return null;
+ }
+
+ public Asn1SetParser GetAuthAttrs()
+ {
+ if (nextObject == null)
+ {
+ nextObject = seq.ReadObject();
+ }
+
+ if (nextObject is Asn1TaggedObjectParser)
+ {
+ IAsn1Convertible o = nextObject;
+ nextObject = null;
+ return (Asn1SetParser)((Asn1TaggedObjectParser)o).GetObjectParser(Asn1Tags.Set, false);
+ }
+
+ // TODO
+ // "The authAttrs MUST be present if the content type carried in
+ // EncryptedContentInfo is not id-data."
+
+ return null;
+ }
+
+ public Asn1OctetString GetMac()
+ {
+ if (nextObject == null)
+ {
+ nextObject = seq.ReadObject();
+ }
+
+ IAsn1Convertible o = nextObject;
+ nextObject = null;
+
+ return Asn1OctetString.GetInstance(o.ToAsn1Object());
+ }
+
+ public Asn1SetParser GetUnauthAttrs()
+ {
+ if (nextObject == null)
+ {
+ nextObject = seq.ReadObject();
+ }
+
+ if (nextObject != null)
+ {
+ IAsn1Convertible o = nextObject;
+ nextObject = null;
+ return (Asn1SetParser)((Asn1TaggedObjectParser)o).GetObjectParser(Asn1Tags.Set, false);
+ }
+
+ return null;
+ }
+ }
+}
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