public async Task <ActionResult> Index(string userfile)
{
// Get an instance of the PadesSignatureExplorer class, used to open/validate PDF signatures.
var sigExplorer = new PadesSignatureExplorer(Util.GetRestPkiClient())
{
// Specify that we want an audit package to be generated, and that the signed file should be
// included in the package.
GenerateAuditPackage = true,
IncludeSignedFileInAuditPackage = true,
// In order to generate an audit package, we must also pass Validate = true.
Validate = true,
// Specify the parameters for the signature validation:
// Accept any PAdES signature as long as the signer has an ICP-Brasil certificate.
DefaultSignaturePolicyId = StandardPadesSignaturePolicies.Basic,
// Specify the security context to be used to determine trust in the certificate chain. We
// have encapsulated the security context choice on Util.cs.
SecurityContextId = Util.GetSecurityContextId()
};
// Set the PDF file.
if (!string.IsNullOrEmpty(userfile))
{
// Verify if the provided userfile exits and get its absolute path.
string userfilePath;
if (!StorageMock.TryGetFile(userfile, out userfilePath))
{
return(HttpNotFound());
}
// Set the userfile's absolute path to the PadesSignatureExplorer instance.
sigExplorer.SetSignatureFile(userfilePath);
}
else
{
// If no userfile is passed, we use a previously signed and B-Stamped file.
sigExplorer.SetSignatureFile(StorageMock.GetSampleBStampedPath());
}
// Call the Open() method, which returns the signature file's information.
var signature = await sigExplorer.OpenAsync();
// If the document has been B-Stamped, store the "digest index file" to show a link on the page.
string indexFileId = null;
if (signature.BStamp != null)
{
using (var indexFileStream = signature.BStamp.IndexFile.OpenRead()) {
indexFileId = StorageMock.Store(indexFileStream, ".txt");
}
}
// Store the generated audit package. Notice that although we asked for its generation, the
// signature might not have been B-Stamped yet, so an audit package might not be returned.
string auditPkgId = null;
if (signature.AuditPackage != null)
{
using (var auditPkgStream = signature.AuditPackage.OpenRead()) {
auditPkgId = StorageMock.Store(auditPkgStream, ".zip");
}
}
// Render the information (see file OpenPadesSignatureBStamp/Index.html for more
// information on the information returned).
return(View(new OpenPadesSignatureBStampModel()
{
Signature = signature,
BStampIndexFile = indexFileId,
AuditPackageFile = auditPkgId
}));
}