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using System;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Cms
{
public class AuthenticatedData
: Asn1Encodable
{
private DerInteger version;
private OriginatorInfo originatorInfo;
private Asn1Set recipientInfos;
private AlgorithmIdentifier macAlgorithm;
private AlgorithmIdentifier digestAlgorithm;
private ContentInfo encapsulatedContentInfo;
private Asn1Set authAttrs;
private Asn1OctetString mac;
private Asn1Set unauthAttrs;
public AuthenticatedData(
OriginatorInfo originatorInfo,
Asn1Set recipientInfos,
AlgorithmIdentifier macAlgorithm,
AlgorithmIdentifier digestAlgorithm,
ContentInfo encapsulatedContent,
Asn1Set authAttrs,
Asn1OctetString mac,
Asn1Set unauthAttrs)
{
if (digestAlgorithm != null || authAttrs != null)
{
if (digestAlgorithm == null || authAttrs == null)
{
throw new ArgumentException("digestAlgorithm and authAttrs must be set together");
}
}
version = new DerInteger(CalculateVersion(originatorInfo));
this.originatorInfo = originatorInfo;
this.macAlgorithm = macAlgorithm;
this.digestAlgorithm = digestAlgorithm;
this.recipientInfos = recipientInfos;
this.encapsulatedContentInfo = encapsulatedContent;
this.authAttrs = authAttrs;
this.mac = mac;
this.unauthAttrs = unauthAttrs;
}
private AuthenticatedData(
Asn1Sequence seq)
{
int index = 0;
version = (DerInteger)seq[index++];
Asn1Encodable tmp = seq[index++];
if (tmp is Asn1TaggedObject)
{
originatorInfo = OriginatorInfo.GetInstance((Asn1TaggedObject)tmp, false);
tmp = seq[index++];
}
recipientInfos = Asn1Set.GetInstance(tmp);
macAlgorithm = AlgorithmIdentifier.GetInstance(seq[index++]);
tmp = seq[index++];
if (tmp is Asn1TaggedObject)
{
digestAlgorithm = AlgorithmIdentifier.GetInstance((Asn1TaggedObject)tmp, false);
tmp = seq[index++];
}
encapsulatedContentInfo = ContentInfo.GetInstance(tmp);
tmp = seq[index++];
if (tmp is Asn1TaggedObject)
{
authAttrs = Asn1Set.GetInstance((Asn1TaggedObject)tmp, false);
tmp = seq[index++];
}
mac = Asn1OctetString.GetInstance(tmp);
if (seq.Count > index)
{
unauthAttrs = Asn1Set.GetInstance((Asn1TaggedObject)seq[index], false);
}
}
/**
* return an AuthenticatedData object from a tagged object.
*
* @param obj the tagged object holding the object we want.
* @param isExplicit true if the object is meant to be explicitly
* tagged false otherwise.
* @throws ArgumentException if the object held by the
* tagged object cannot be converted.
*/
public static AuthenticatedData GetInstance(
Asn1TaggedObject obj,
bool isExplicit)
{
return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
}
/**
* return an AuthenticatedData object from the given object.
*
* @param obj the object we want converted.
* @throws ArgumentException if the object cannot be converted.
*/
public static AuthenticatedData GetInstance(
object obj)
{
if (obj == null || obj is AuthenticatedData)
{
return (AuthenticatedData)obj;
}
if (obj is Asn1Sequence)
{
return new AuthenticatedData((Asn1Sequence)obj);
}
throw new ArgumentException("Invalid AuthenticatedData: " + Platform.GetTypeName(obj));
}
public DerInteger Version
{
get { return version; }
}
public OriginatorInfo OriginatorInfo
{
get { return originatorInfo; }
}
public Asn1Set RecipientInfos
{
get { return recipientInfos; }
}
public AlgorithmIdentifier MacAlgorithm
{
get { return macAlgorithm; }
}
public AlgorithmIdentifier DigestAlgorithm
{
get { return digestAlgorithm; }
}
public ContentInfo EncapsulatedContentInfo
{
get { return encapsulatedContentInfo; }
}
public Asn1Set AuthAttrs
{
get { return authAttrs; }
}
public Asn1OctetString Mac
{
get { return mac; }
}
public Asn1Set UnauthAttrs
{
get { return unauthAttrs; }
}
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* AuthenticatedData ::= SEQUENCE {
* version CMSVersion,
* originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL,
* recipientInfos RecipientInfos,
* macAlgorithm MessageAuthenticationCodeAlgorithm,
* digestAlgorithm [1] DigestAlgorithmIdentifier OPTIONAL,
* encapContentInfo EncapsulatedContentInfo,
* authAttrs [2] IMPLICIT AuthAttributes OPTIONAL,
* mac MessageAuthenticationCode,
* unauthAttrs [3] IMPLICIT UnauthAttributes OPTIONAL }
*
* AuthAttributes ::= SET SIZE (1..MAX) OF Attribute
*
* UnauthAttributes ::= SET SIZE (1..MAX) OF Attribute
*
* MessageAuthenticationCode ::= OCTET STRING
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(version);
v.AddOptionalTagged(false, 0, originatorInfo);
v.Add(recipientInfos, macAlgorithm);
v.AddOptionalTagged(false, 1, digestAlgorithm);
v.Add(encapsulatedContentInfo);
v.AddOptionalTagged(false, 2, authAttrs);
v.Add(mac);
v.AddOptionalTagged(false, 3, unauthAttrs);
return new BerSequence(v);
}
public static int CalculateVersion(OriginatorInfo origInfo)
{
if (origInfo == null)
return 0;
int ver = 0;
foreach (object obj in origInfo.Certificates)
{
if (obj is Asn1TaggedObject)
{
Asn1TaggedObject tag = (Asn1TaggedObject)obj;
if (tag.TagNo == 2)
{
ver = 1;
}
else if (tag.TagNo == 3)
{
ver = 3;
break;
}
}
}
foreach (object obj in origInfo.Crls)
{
if (obj is Asn1TaggedObject)
{
Asn1TaggedObject tag = (Asn1TaggedObject)obj;
if (tag.TagNo == 1)
{
ver = 3;
break;
}
}
}
return ver;
}
}
}
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