public CmsEnvelopedDataParser(
Stream envelopedData)
: base(envelopedData)
{
this._attrNotRead = true;
this.envelopedData = new EnvelopedDataParser(
(Asn1SequenceParser)this.contentInfo.GetContent(Asn1Tags.Sequence));
// TODO Validate version?
//DerInteger version = this.envelopedData.Version;
//
// read the recipients
//
Asn1Set recipientInfos = Asn1Set.GetInstance(this.envelopedData.GetRecipientInfos().ToAsn1Object());
//
// read the encrypted content info
//
EncryptedContentInfoParser encInfo = this.envelopedData.GetEncryptedContentInfo();
this._encAlg = encInfo.ContentEncryptionAlgorithm;
CmsReadable readable = new CmsProcessableInputStream(
((Asn1OctetStringParser)encInfo.GetEncryptedContent(Asn1Tags.OctetString)).GetOctetStream());
CmsSecureReadable secureReadable = new CmsEnvelopedHelper.CmsEnvelopedSecureReadable(
this._encAlg, readable);
//
// build the RecipientInformationStore
//
this.recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore(
recipientInfos, secureReadable);
}
public CmsEnvelopedDataParser(
Stream envelopedData)
: base(envelopedData)
{
this._attrNotRead = true;
this.envelopedData = new EnvelopedDataParser(
(Asn1SequenceParser)this.contentInfo.GetContent(Asn1Tags.Sequence));
//
// load the RecepientInfoStore
//
Asn1SetParser s = this.envelopedData.GetRecipientInfos();
IList baseInfos = new ArrayList();
Asn1Set set = Asn1Set.GetInstance(s.ToAsn1Object());
foreach (object o in set)
{
baseInfos.Add(RecipientInfo.GetInstance(o));
}
//
// read the encrypted content info
//
EncryptedContentInfoParser encInfo = this.envelopedData.GetEncryptedContentInfo();
this._encAlg = encInfo.ContentEncryptionAlgorithm;
//
// prime the recepients
//
IList infos = new ArrayList();
Stream dataStream = ((Asn1OctetStringParser)encInfo.GetEncryptedContent(Asn1Tags.OctetString)).GetOctetStream();
foreach (Asn1.Cms.RecipientInfo info in baseInfos)
{
Asn1Encodable recipInfo = info.Info;
if (recipInfo is Asn1.Cms.KeyTransRecipientInfo)
{
infos.Add(new KeyTransRecipientInformation(
(KeyTransRecipientInfo) recipInfo, _encAlg, dataStream));
}
else if (recipInfo is Asn1.Cms.KekRecipientInfo)
{
infos.Add(new KekRecipientInformation(
(KekRecipientInfo) recipInfo, _encAlg, dataStream));
}
else if (recipInfo is KeyAgreeRecipientInfo)
{
infos.Add(new KeyAgreeRecipientInformation(
(KeyAgreeRecipientInfo) recipInfo, _encAlg, dataStream));
}
else if (recipInfo is PasswordRecipientInfo)
{
infos.Add(new PasswordRecipientInformation(
(PasswordRecipientInfo) recipInfo, _encAlg, dataStream));
}
}
this.recipientInfoStore = new RecipientInformationStore(infos);
}
private ITestResult EnvelopedTest()
{
try
{
// Key trans
ContentInfo info = ContentInfo.GetInstance(
Asn1Object.FromByteArray(envDataKeyTrns));
EnvelopedData envData = EnvelopedData.GetInstance(info.Content);
Asn1Set s = envData.RecipientInfos;
if (s.Count != 1)
{
return new SimpleTestResult(false, Name + ": CMS KeyTrans enveloped, wrong number of recipients");
}
RecipientInfo recip = RecipientInfo.GetInstance(s[0]);
if (recip.Info is KeyTransRecipientInfo)
{
KeyTransRecipientInfo inf = KeyTransRecipientInfo.GetInstance(recip.Info);
inf = new KeyTransRecipientInfo(inf.RecipientIdentifier, inf.KeyEncryptionAlgorithm, inf.EncryptedKey);
s = new DerSet(new RecipientInfo(inf));
}
else
{
return new SimpleTestResult(false, Name + ": CMS KeyTrans enveloped, wrong recipient type");
}
envData = new EnvelopedData(envData.OriginatorInfo, s, envData.EncryptedContentInfo, envData.UnprotectedAttrs);
info = new ContentInfo(CmsObjectIdentifiers.EnvelopedData, envData);
if (!Arrays.AreEqual(info.GetEncoded(), envDataKeyTrns))
{
return new SimpleTestResult(false, Name + ": CMS KeyTrans enveloped failed to re-encode");
}
// KEK
info = ContentInfo.GetInstance(
Asn1Object.FromByteArray(envDataKEK));
envData = EnvelopedData.GetInstance(info.Content);
s = envData.RecipientInfos;
if (s.Count != 1)
{
return new SimpleTestResult(false, Name + ": CMS KEK enveloped, wrong number of recipients");
}
recip = RecipientInfo.GetInstance(s[0]);
if (recip.Info is KekRecipientInfo)
{
KekRecipientInfo inf = KekRecipientInfo.GetInstance(recip.Info);
inf = new KekRecipientInfo(inf.KekID, inf.KeyEncryptionAlgorithm, inf.EncryptedKey);
s = new DerSet(new RecipientInfo(inf));
}
else
{
return new SimpleTestResult(false, Name + ": CMS KEK enveloped, wrong recipient type");
}
envData = new EnvelopedData(envData.OriginatorInfo, s, envData.EncryptedContentInfo, envData.UnprotectedAttrs);
info = new ContentInfo(CmsObjectIdentifiers.EnvelopedData, envData);
if (!Arrays.AreEqual(info.GetEncoded(), envDataKEK))
{
return new SimpleTestResult(false, Name + ": CMS KEK enveloped failed to re-encode");
}
// Nested NDEF problem
Asn1StreamParser asn1In = new Asn1StreamParser(new MemoryStream(envDataNestedNDEF, false));
ContentInfoParser ci = new ContentInfoParser((Asn1SequenceParser)asn1In.ReadObject());
EnvelopedDataParser ed = new EnvelopedDataParser((Asn1SequenceParser)ci
.GetContent(Asn1Tags.Sequence));
Touch(ed.Version);
ed.GetOriginatorInfo();
ed.GetRecipientInfos().ToAsn1Object();
EncryptedContentInfoParser eci = ed.GetEncryptedContentInfo();
Touch(eci.ContentType);
Touch(eci.ContentEncryptionAlgorithm);
Stream dataIn = ((Asn1OctetStringParser)eci.GetEncryptedContent(Asn1Tags.OctetString))
.GetOctetStream();
Streams.Drain(dataIn);
dataIn.Close();
// Test data doesn't have unprotected attrs, bug was being thrown by this call
Asn1SetParser upa = ed.GetUnprotectedAttrs();
if (upa != null)
{
upa.ToAsn1Object();
}
return new SimpleTestResult(true, Name + ": Okay");
}
catch (Exception e)
{
return new SimpleTestResult(false, Name + ": CMS enveloped failed - " + e.ToString(), e);
}
}
private void ParseEnveloped(
byte[] data)
{
Asn1StreamParser aIn = new Asn1StreamParser(data);
ContentInfoParser cP = new ContentInfoParser((Asn1SequenceParser)aIn.ReadObject());
EnvelopedDataParser eP = new EnvelopedDataParser((Asn1SequenceParser)cP.GetContent(Asn1Tags.Sequence));
eP.GetRecipientInfos().ToAsn1Object(); // Must drain the parser!
EncryptedContentInfoParser ecP = eP.GetEncryptedContentInfo();
Asn1OctetStringParser content = (Asn1OctetStringParser)ecP.GetEncryptedContent(Asn1Tags.OctetString);
Streams.Drain(content.GetOctetStream());
}