private EncryptedSharedFolderData Encrypt(RequestedToken requestedToken, SharedFolderData sharedFolderData)
{
XmlElement xmlElement;
try
{
xmlElement = sharedFolderData.SerializeToXmlElement();
}
catch (InvalidOperationException innerException)
{
throw new UnableToGenerateEncryptedSharedFolderDataException(innerException);
}
XmlElement encryptedData;
try
{
encryptedData = SymmetricEncryptedXml.Encrypt(xmlElement, requestedToken.ProofToken);
}
catch (CryptographicException innerException2)
{
throw new UnableToGenerateEncryptedSharedFolderDataException(innerException2);
}
return(new EncryptedSharedFolderData
{
Token = new EncryptedDataContainer
{
EncryptedData = requestedToken.SecurityToken
},
Data = new EncryptedDataContainer
{
EncryptedData = encryptedData
}
});
}
public SharedFolderData TryDecrypt(EncryptedSharedFolderData encryptedSharedFolderData)
{
if (encryptedSharedFolderData.Token == null)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption>((long)this.GetHashCode(), "{0}: EncryptedSharedFolderData is missing Token element.", this);
return(null);
}
if (encryptedSharedFolderData.Token.EncryptedData == null)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption>((long)this.GetHashCode(), "{0}: EncryptedSharedFolderData.Token is missing <EncryptedData> element.", this);
return(null);
}
if (encryptedSharedFolderData.Data == null)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption>((long)this.GetHashCode(), "{0}: EncryptedSharedFolderData is missing <Data> element.", this);
return(null);
}
if (encryptedSharedFolderData.Data.EncryptedData == null)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption>((long)this.GetHashCode(), "{0}: EncryptedSharedFolderData.Data is missing <EncryptedData> element.", this);
return(null);
}
TokenValidationResults tokenValidationResults = this.externalAuthentication.TokenValidator.ValidateToken(encryptedSharedFolderData.Token.EncryptedData, Offer.SharingInviteMessage);
if (tokenValidationResults.Result != TokenValidationResult.Valid)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption, TokenValidationResults>((long)this.GetHashCode(), "{0}: Token is not valid. TokenValidationResults={1}", this, tokenValidationResults);
return(null);
}
SymmetricSecurityKey proofToken = tokenValidationResults.ProofToken;
if (proofToken == null)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption>((long)this.GetHashCode(), "{0}: Unable to retrieve the security key from the token.", this);
return(null);
}
XmlElement xmlElement;
try
{
xmlElement = SymmetricEncryptedXml.Decrypt(encryptedSharedFolderData.Data.EncryptedData, proofToken);
}
catch (CryptographicException arg)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption, CryptographicException>((long)this.GetHashCode(), "{0}: Unable to decrypt the data element. Exception={1}", this, arg);
return(null);
}
SharedFolderData result;
try
{
result = SharedFolderData.DeserializeFromXmlELement(xmlElement);
}
catch (InvalidOperationException arg2)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption, InvalidOperationException>((long)this.GetHashCode(), "{0}: Unable to deserialize the data element. InvalidOperationException={1}", this, arg2);
result = null;
}
catch (XmlException arg3)
{
SharedFolderDataEncryption.Tracer.TraceError <SharedFolderDataEncryption, XmlException>((long)this.GetHashCode(), "{0}: Unable to deserialize the data element. XmlException={1}", this, arg3);
result = null;
}
return(result);
}