private byte[] generatePrinterFriendlyVersion(byte[] pdfContent, string verificationCode)
{
var client = Util.GetRestPkiClient();
// The verification code is generated without hyphens to save storage space and avoid
// copy-and-paste problems. On the PDF generation, we use the "formatted" version, with hyphens
// (which will later be discarded on the verification page).
var formattedVerificationCode = Util.FormatVerificationCode(verificationCode);
// Build the verification link from the constant "VerificationLinkFormat" (see above) and the
// formatted verification code.
var verificationLink = string.Format(VerificationLinkFormat, formattedVerificationCode);
// 1. Upload the PDF
var blob = client.UploadFile(pdfContent);
// 2. Inspect signatures on the uploaded PDF
var sigExplorer = new PadesSignatureExplorer(client)
{
Validate = true,
DefaultSignaturePolicyId = StandardPadesSignaturePolicies.Basic,
SecurityContextId = Util.GetSecurityContextId(),
};
sigExplorer.SetSignatureFile(blob);
var signature = sigExplorer.Open();
// 3. Create PDF with verification information from uploaded PDF
var pdfMarker = new PdfMarker(client);
pdfMarker.SetFile(blob);
// Build string with joined names of signers (see method getDisplayName below)
var signerNames = Util.JoinStringsPt(signature.Signers.Select(s => getDisplayName(s.Certificate)));
var allPagesMessage = string.Format("This document was digitally signed by {0}.\nTo verify the signatures go to {1} on {2} and inform the code {3}", signerNames, VerificationSiteNameWithArticle, VerificationSite, formattedVerificationCode);
// PdfHelper is a class from the Rest PKI Client "fluent API" that helps to create elements and
// parameters for the PdfMarker.
var pdf = new PdfHelper();
// ICP-Brasil logo on bottom-right corner of every page (except on the page which will be created
// at the end of the document).
pdfMarker.Marks.Add(
pdf.Mark()
.OnAllPages()
.OnContainer(pdf.Container().Width(1).AnchorRight(1).Height(1).AnchorBottom(1))
.AddElement(
pdf.ImageElement()
.WithOpacity(75)
.WithImage(StorageMock.GetIcpBrasilLogoContent(), "image/png")
)
);
// Summary on bottom margin of every page (except on the page which will be created at the end of
// the document).
pdfMarker.Marks.Add(
pdf.Mark()
.OnAllPages()
.OnContainer(pdf.Container().Height(2).AnchorBottom().VarWidth().Margins(1.5, 3.5))
.AddElement(
pdf.TextElement()
.WithOpacity(75)
.AddSection(allPagesMessage)
)
);
// Summary on right margin of every page (except on the page which will be created at the end of
// the document), rotated 90 degrees counterclockwise (text goes up).
pdfMarker.Marks.Add(
pdf.Mark()
.OnAllPages()
.OnContainer(pdf.Container().Width(2).AnchorRight().VarHeight().Margins(1.5, 3.5))
.AddElement(
pdf.TextElement()
.Rotate90Counterclockwise()
.WithOpacity(75)
.AddSection(allPagesMessage)
)
);
// Create a "manifest" mark on a new page added on the end of the document. We'll add several
// elements to this mark.
var manifestMark = pdf.Mark()
.OnNewPage()
// This mark's container is the whole page with 1-inch margins.
.OnContainer(pdf.Container().VarWidthAndHeight().Margins(2.54, 2.54));
// We'll keep track of our "vertical offset" as we add elements to the mark.
double verticalOffset = 0;
double elementHeight;
elementHeight = 3;
manifestMark
// ICP-Brasil logo on the upper-left corner.
.AddElement(
pdf.ImageElement()
.OnContainer(pdf.Container().Height(elementHeight).AnchorTop(verticalOffset).Width(elementHeight /* using elementHeight as width because the image is square */).AnchorLeft())
.WithImage(StorageMock.GetIcpBrasilLogoContent(), "image/png")
)
// QR Code with the verification link on the upper-right corner.
.AddElement(
pdf.QRCodeElement()
.OnContainer(pdf.Container().Height(elementHeight).AnchorTop(verticalOffset).Width(elementHeight /* using elementHeight as width because QR Codes are square */).AnchorRight())
.WithQRCodeData(verificationLink)
)
// Header "VERIFICAÇÃO DAS ASSINATURAS" centered between ICP-Brasil logo and QR Code.
.AddElement(
pdf.TextElement()
.OnContainer(pdf.Container().Height(elementHeight).AnchorTop(verticalOffset + 0.2).FullWidth())
.AlignTextCenter()
.AddSection(pdf.TextSection().WithFontSize(NormalFontSize * 1.6).WithText("SIGNATURE\nVERIFICATION"))
);
verticalOffset += elementHeight;
// Vertical padding.
verticalOffset += 1.7;
// Header with verification code.
elementHeight = 2;
manifestMark.AddElement(
pdf.TextElement()
.OnContainer(pdf.Container().Height(elementHeight).AnchorTop(verticalOffset).FullWidth())
.AlignTextCenter()
.AddSection(pdf.TextSection().WithFontSize(NormalFontSize * 1.2).WithText(string.Format("Verification Code: {0}", formattedVerificationCode)))
);
verticalOffset += elementHeight;
// Paragraph saying "this document was signed by the following signers etc" and mentioning the
// time zone of the date/times below.
elementHeight = 2.5;
manifestMark.AddElement(
pdf.TextElement()
.OnContainer(pdf.Container().Height(elementHeight).AnchorTop(verticalOffset).FullWidth())
.AddSection(pdf.TextSection().WithFontSize(NormalFontSize).WithText(string.Format("This document was digitally signed by the following signers on the indicated dates ({0}):", TimeZoneDisplayName)))
);
verticalOffset += elementHeight;
// Iterate signers.
foreach (var signer in signature.Signers)
{
elementHeight = 1.5;
manifestMark
// Green "check" or red "X" icon depending on result of validation for this signer.
.AddElement(
pdf.ImageElement()
.OnContainer(pdf.Container().Height(0.5).AnchorTop(verticalOffset + 0.2).Width(0.5).AnchorLeft())
.WithImage(StorageMock.GetValidationResultIcon(signer.ValidationResults.IsValid), "image/png")
)
// Description of signer (see method getSignerDescription() below).
.AddElement(
pdf.TextElement()
.OnContainer(pdf.Container().Height(elementHeight).AnchorTop(verticalOffset).VarWidth().Margins(0.8, 0))
.AddSection(pdf.TextSection().WithFontSize(NormalFontSize).WithText(getSignerDescription(signer)))
);
verticalOffset += elementHeight;
}
// Some vertical padding from last signer.
verticalOffset += 1;
// Paragraph with link to verification site and citing both the verification code above and the
// verification link below.
elementHeight = 2.5;
manifestMark.AddElement(
pdf.TextElement()
.OnContainer(pdf.Container().Height(elementHeight).AnchorTop(verticalOffset).FullWidth())
.AddSection(pdf.TextSection().WithFontSize(NormalFontSize).WithText(string.Format("To verify the signatures, go to {0} on ", VerificationSiteNameWithArticle)))
.AddSection(pdf.TextSection().WithFontSize(NormalFontSize).WithColor(Color.Blue).WithText(VerificationSite))
.AddSection(pdf.TextSection().WithFontSize(NormalFontSize).WithText(" and inform the code above or follow the link below:"))
);
verticalOffset += elementHeight;
// Verification link.
elementHeight = 1.5;
manifestMark.AddElement(
pdf.TextElement()
.OnContainer(pdf.Container().Height(elementHeight).AnchorTop(verticalOffset).FullWidth())
.AddSection(pdf.TextSection().WithFontSize(NormalFontSize).WithColor(Color.Blue).WithText(verificationLink))
.AlignTextCenter()
);
// Apply marks.
pdfMarker.Marks.Add(manifestMark);
var result = pdfMarker.Apply();
// Return result.
return(result.GetContent());
}