|
public static GetInstance ( object o ) : |
||
| o | object | |
| Résultat | ||
public EnvelopedData(
OriginatorInfo originatorInfo,
Asn1Set recipientInfos,
EncryptedContentInfo encryptedContentInfo,
Asn1Set unprotectedAttrs)
{
if (originatorInfo != null || unprotectedAttrs != null)
{
version = new DerInteger(2);
}
else
{
version = new DerInteger(0);
foreach (object o in recipientInfos)
{
RecipientInfo ri = RecipientInfo.GetInstance(o);
if (!ri.Version.Equals(version))
{
version = new DerInteger(2);
break;
}
}
}
this.originatorInfo = originatorInfo;
this.recipientInfos = recipientInfos;
this.encryptedContentInfo = encryptedContentInfo;
this.unprotectedAttrs = unprotectedAttrs;
}
public static int CalculateVersion(OriginatorInfo originatorInfo, Asn1Set recipientInfos, Asn1Set unprotectedAttrs)
{
if (originatorInfo != null || unprotectedAttrs != null)
{
return(2);
}
global::System.Collections.IEnumerator enumerator = recipientInfos.GetEnumerator();
try
{
while (enumerator.MoveNext())
{
object current = enumerator.get_Current();
RecipientInfo instance = RecipientInfo.GetInstance(current);
if (instance.Version.Value.IntValue != 0)
{
return(2);
}
}
}
finally
{
global::System.IDisposable disposable = enumerator as global::System.IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
return(0);
}
public static int CalculateVersion(OriginatorInfo originatorInfo, Asn1Set recipientInfos, Asn1Set unprotectedAttrs)
{
if (originatorInfo != null || unprotectedAttrs != null)
{
return(2);
}
foreach (object current in recipientInfos)
{
RecipientInfo instance = RecipientInfo.GetInstance(current);
if (instance.Version.Value.IntValue != 0)
{
return(2);
}
}
return(0);
}
public static int CalculateVersion(OriginatorInfo originatorInfo, Asn1Set recipientInfos, Asn1Set unprotectedAttrs)
{
if (originatorInfo != null || unprotectedAttrs != null)
{
return(2);
}
foreach (object o in recipientInfos)
{
RecipientInfo ri = RecipientInfo.GetInstance(o);
if (ri.Version.IntValueExact != 0)
{
return(2);
}
}
return(0);
}
public MimeEntity DecryptEntity(byte[] encryptedBytes, X509Certificate2 decryptingCertificate)
{
try
{
if (decryptingCertificate == null)
{
throw new EncryptionException(EncryptionError.NoCertificates);
}
// TODO: introduce buffering if you are using large files
// CMSEnvelopeData is a PKCS# structure rfc4134
var envelopedData = new CmsEnvelopedData(encryptedBytes);
var envData = EnvelopedData.GetInstance(envelopedData.ContentInfo.Content);
using (var session = GetSession())
{
if (session == null)
{
return(null);
}
foreach (Asn1Sequence asn1Set in envData.RecipientInfos)
{
var recip = RecipientInfo.GetInstance(asn1Set);
var keyTransRecipientInfo = KeyTransRecipientInfo.GetInstance(recip.Info);
var sessionKey = Pkcs11Util.Decrypt(session, keyTransRecipientInfo, decryptingCertificate);
#if DEBUG
Console.WriteLine(Asn1Dump.DumpAsString(envData));
#endif
if (sessionKey == null)
{
continue;
}
var recipientId = new RecipientID();
var issuerAndSerialNumber = (IssuerAndSerialNumber)keyTransRecipientInfo.RecipientIdentifier.ID;
recipientId.Issuer = issuerAndSerialNumber.Name;
recipientId.SerialNumber = issuerAndSerialNumber.SerialNumber.Value;
var recipientInformation = envelopedData.GetRecipientInfos().GetRecipients(recipientId);
var recipients = new ArrayList(recipientInformation);
//
// read the encrypted content info
//
var encInfo = envData.EncryptedContentInfo;
var encAlg = encInfo.ContentEncryptionAlgorithm;
var readable = new CmsProcessableByteArray(encInfo.EncryptedContent.GetOctets());
var keyParameter = ParameterUtilities.CreateKeyParameter(encAlg.Algorithm.Id, sessionKey);
// Todo: does this work with multi recipient?
foreach (RecipientInformation recipient in recipients)
{
var cmsReadable = GetReadable(keyParameter, encAlg, readable);
var cmsTypedStream = new CmsTypedStream(cmsReadable.GetInputStream());
var contentBytes = StreamToByteArray(cmsTypedStream.ContentStream);
var mimeEntity = MimeSerializer.Default.Deserialize <MimeEntity>(contentBytes);
return(mimeEntity);
}
}
}
}
catch (Exception ex)
{
Error.NotifyEvent(this, ex);
}
return(null);
}
