private async Task<HttpResponseMessage> SignDocumentAsync(SigningDocType signingDocType, Guid fileKey, string signatureXPath = null, IDictionary<string, string> signatureXPathNamespaces = null)
{
string serialNumber = System.Configuration.ConfigurationManager.AppSettings["Common.Api:CertificateSerialNumber"];
string pinCode = System.Configuration.ConfigurationManager.AppSettings["Common.Api:CertificatePinCode"];
using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["DbContext"].ConnectionString))
{
await connection.OpenAsync();
Stream signedStream = null;
using (var blobStream = new BlobReadStream(connection, "dbo", "Blobs", "Content", "Key", fileKey))
{
if (signingDocType == SigningDocType.Xml)
{
XmlSigner xmlSigner = new XmlSigner(serialNumber, pinCode);
signedStream = xmlSigner.Sign(blobStream, Encoding.UTF8, signatureXPath, signatureXPathNamespaces);
}
else if (signingDocType == SigningDocType.Office)
{
OfficeSigner xmlSigner = new OfficeSigner(serialNumber, pinCode);
try
{
signedStream = new MemoryStream();
blobStream.CopyTo(signedStream);
signedStream.Position = 0;
xmlSigner.SignInPlace(signedStream);
}
catch (Exception)
{
signedStream.Dispose();
throw;
}
}
}
using (signedStream)
{
using (var blobWriter = new BlobWriter(connection))
using (var stream = await blobWriter.OpenStreamAsync())
{
signedStream.Position = 0;
signedStream.CopyTo(stream);
var blobKey = blobWriter.GetBlobKey();
return Request.CreateResponse(HttpStatusCode.OK, new { fileKey = blobKey });
}
}
}
}
