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 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;
}