iText Knowledge Base

PDF and Digital Signatures

. This timestamp is stored inside the digital signature, but PAdES-4 also introduced the concepts of a Document Security Store (DSS

Digital Signatures Hub

signing PDF documents with iText 7. eBooks Digital Signatures for PDF Documents Our Digital Signatures eBook

Using iText 7 and AWS KMS to digitally sign a PDF document: Part 5

https://kb.itextpdf.com/home/it7kb/examples/using-itext-7-and-aws-kms-to-digitally-sign-a-pdf-document-part-3 Using iText 7 and AWS KMS t

Using iText 7 and AWS KMS to digitally sign a PDF document: Part 3

https://kb.itextpdf.com/home/it7kb/examples/using-itext-7-and-aws-kms-to-digitally-sign-a-pdf-document-part-2 Using iText 7 and AWS KMS t

Using iText 7 and AWS KMS to digitally sign a PDF document: Part 2

Using iText 7 and AWS KMS to digitally sign a PDF document: Part 4

pdfOffice: Digital Signing

. One such use case is the digital signing of documents. Code Snippet: In the following example we will look into a possible

Using iText 7 and AWS KMS to digitally sign a PDF document: Part 4

This example was written for the article "Using iText 7 and AWS KMS to digitally sign a PDF document

How to use a Digital Signing Service (DSS) such as GlobalSign, with iText 7

Introduction When we want to sign a PDF with a digital signature, we need to generate a hash from the document’s data and sign

How to enable LTV for a timestamp signature?

Acrobat tells me my signature is LTV enabled, but the timestamp signature is not. How can I make both LTV enabled? I'm using

Using iText 7 and AWS KMS to digitally sign a PDF document: Part 1

KMS to digitally sign a PDF document: Part 4

What is the connection between LTV and document timestamps?

signing a document with a digital certificate in acrobat and when opened it says the document is LTV enabled, I did not use any

Why iText and Blockchain?

that are inherent to digital signatures in PDF. Based on our research, we filed a series of patents describing mechanisms

Remove digital signatures

flattensignature <div data-pym-src='https://itext.jdoodle.com/embed/itext'

Part I - Overview and Simple Cases

to the signature. It is generally a good idea to add a digital timestamp. For common RFC 3161 timestamp servers you can use

What does "Not LTV-enabled" mean?

-enabled is explained in part 4 of the PDF Advanced Electronic Signatures (PAdES) standard: 4 Profile for PAdES-LTV 4.1 Overview

Advantages of using Blockchain for Signing PDF documents

Suppose that we don't store the signature of a document in the document itself, but instead store it in the blockchain

Part II - Proprietary APIs and Custom Providers

. Another example is the usage of Singapore's National Digital identity (NDI) project to create PDF signatures with iText. You

Part III - PKCS#11

GeneralSecurityException { String algorithm = hashAlgorithm + "with" + encryptionAlgorithm; Signature sig = Signature.getInstance(algorit

Part IV - Appearances

When people sign a PDF, they often do not merely want to see that signature in some extra signature panel, they want to see

Release iText 7.0.3

and 2.0 .NET port of pdfXfa PDF 2.0: Review AES-256 encryption PDF 2.0: Review dig sig PDF 2.0 and digital signatures: create

Why do I get an error saying that "use of extended features is no longer available"?

. It is a process that requires a digital signature using a private key from Adobe. When a valid signature is present, specific

Blockchain for PDF Documents

Document And Digital Signature Headaches

How to fill XFA form using iText without breaking usage rights?

that your PDF is digitally signed using a private key owned by Adobe. By reorganizing the objects inside the PDF, that signature

What is the difference between iText, JasperReports and Adobe LC?

with Adobe LC in some areas, for instance digital signing (read the white paper from the Office of Legislative Counsel on digital

Release iText Core 7.1.17

in an unpredictable way FormField setValue shall keep text font Form flattening doesn`t ignore an unfilled digital signature

How can I create a Reader enabled PDF with a signature field that can be signed in Adobe Reader

successfully created a document containing an empty signature field. Now I want to allow people to sign this document in Adobe Reader. I'

Do we license per functionality /feature?

iText 7 Core includes about 500 functions which we license as a single SDK. This includes creation, merging, tagging, digital

Release iText 7.1.7

of the parent elements are named the same Form flattening doesn`t ignore an unfilled digital signature field without an appearance itext7

Can I create a Reader-enabled PDF using iText?

. A Reader-enabled PDF contains a digital signature that needs to be validated correctly for the extra usage rights to be unlocked

Release pdfXFA 3.0.1

to static PDF. It also enables you to add a digital signature to converted XFA forms as additional security for further processing

Release iText Core 7.1.12

one Bugs Digital Signatures: annotation dictionary incorrectly updated when signing a pre-signed document Incorrect appearance

Before we start: installing iText 7 | .NET

for digital signatures. All the DLLs listed above are available under the AGPL license. Additional iText 7 functionality

iText 7: Jump-Start Tutorial for .NET

covered in this Jump-Start Tutorial, such as digital signature technology and text extraction. Follow @iText

iText 7: Jump-Start Tutorial for Java

covered in this Jump-Start Tutorial, such as digital signature technology and text extraction. Follow @iText on Twitter

Use cases

on invoices, so that people receiving an invoice pay the invoiced amount to the wrong party. Digital signatures on invoices can protect

Release iText Core 7.1.16

is refactoring the PdfSigner class responsible for digital signatures. Specifically, the customization of a signature's appearance

Release iText 7.0.4

] - NullPointerException thrown when converting HTML to PDF [DEVSIX-1441 https://jira.itextsupport.com/browse/DEVSIX-1441] - Digital Signa

Before we start: installing iText 7

) sign: use this if you need support for digital signatures. All the jars listed above are available under the AGPL license

Release iText 7.1.0

tagged PDF tag set and namespaces, and associated files. iText 7 already supported industry standards, such as PAdES digital

Release iText 7.1.6

a line at an hyphen used to denote a minus sign. [DEVSIX-2659] : When creating a digital signature the iText Library does

Release iText 7.1.10

] When filling unmerged fields iText doesn't distinguish field and widget dictionaries [CORE] Digital Signatures: annotation

Release iText 7.1.4

request for digital signatures. Bug fixes: PdfDocument handling issues: append mode for partially compressed files, and fix

Installing iText 7 Community for Java developers

> </dependency>  <dependency> <groupId>com.itextpdf</groupId> <artifactId>sign</artifactId

How to create a complex PDF document?

that will be provided to the users. I am looking for a way to create PDF (no need for digital certificates for now). What is the easiest

Release iText 7.0.6

using convertToElements() method of pdfHtml. [DEVSIX-1689] - IOException: Invalid code encountered while decoding 2D group 4

Installing iText 7 for Java

>${itext.version}</version> </dependency>  <dependency> <groupId>com.itextpdf</groupId

Release iText 7.1.5

sign Fix security incident where our signature checker is too lenient. The CVE number for this vulnerability is pending. svg

Installing the iText license key and license key library for Java and .NET

and licensing-remote dependencies, and the version number for the licensing libraries was increased from version 3.x to 4.x

Release iText 7.1.1

: Invalid code encountered while decoding 2D group 4 compressed data during image extraction. [DEVSIX-1704] - Showing a horizontal page

How to get specific types from AcroFields? Like PushButtonField, RadioCheckField, etc

)) { writer.println("Signature"); } else if (0 == PdfName.Tx.compareTo(type)) { writer.println("Text"); }else { writer.println

What does PDF 2.0 stand for?

PDF 2.0 specifies a digital form for representing electronic documents to enable users to exchange and view electronic

Why do I get an "InvalidPdfException: PDF header signature not found"?

Is there some other way around this issue, that can allow reading of the pdf despite this problem? I have some code that reads pdf files.

An IExternalSignature implementation for signing via PKCS#11 with the Entrust Signing Automation Service

("target/test-outputs", "signature"); @BeforeAll public static void setUpBeforeClass() throws Exception { RESULT_FOLDER.mkdirs

Release iText 7.0.0

inspection, non-Latin script support and digital invoicing. iText is currently used by over 5.000 companies around the world

iText 7

, such as digital signing and more. Releases (compatibility matrix https://kb.itextpdf.com/home/it7kb/compatibility-matrix

How does iText Group count processes/files?

from scratch for your customer. Opening a bank statement and digitally signing it on behalf of the bank. license itext_7_suite

How to display barcodes in a matrix-like structure?

in the same PDF page in three columns each one containing 4 bar codes (in other words it's 4 by 3 matrix). Posted on StackOverflow on Feb

How to create a table with complex borders?

, getOccupiedAreaBBox().getY() + 1.5f, getOccupiedAreaBBox().getWidth() - 3, getOccupiedAreaBBox().getHeight() - 3, 4

How to convert an A4 size PDF to a PDF booklet?

don't want the consecutive pages to appear side by side on the same page. I want page 4 and 1 on one page and page 2 and 3

Inspect a PDF

annotation? How to extract embedded streams? Why do I get an InvalidPdfException: PDF header signature not found ? How can I read

How to create unique images with Image.getInstance()?

Image(ImageDataFactory.create(1, 1, 4, 8, new byte[]{(byte) 255, (byte) 0, (byte) 0, (byte) 0}, null)); cyan.scaleToFit(30, 30

Release iText 7.0.5

] - Setting certification level causes invalid signature [DEVSIX-608 https://jira.itextsupport.com/browse/DEVSIX-608] - Review

How to get text and image in the same cell?

of the image in the same cell at the left side. Here is my part of code : for (int i = x; i 48; i += 4) { int number = i + 4

How to reorder pages in an existing PDF file?

as the first argument to reorder pages. This list can consist of increasing page numbers, 1, 2, 3, 4,... If you change the order

Why doesn't FontFactory.GetFont() work for all fonts?

containing the metrics of the 14 Standard Type 1 fonts (4 flavors of Helvetica, 4 flavors of Times Roman, 4 flavors of Courier, Symbol

General questions about iText

? How to find out the current cursor position on a page? How to enable LTV for a timestamp signature? How to hyphenate text? How

How to embed a font only partially?

: The Standard Type 1 fonts are 4 flavors of Helvetica (regular, bold, italic, bold-italic), 4 flavors of Times Roman (...), 4 flavors

pdfHTML: Using emojis in iText

Introduction From their humble beginnings in 1999, emojis have become a staple of digital communication and most document

Release pdfOffice 1.0.0

digitally signing them with them to have proof of integrity, reducing the file size (pdfOptimizer) or converting them into images

How to watermark PDFs using text or images?

, you have to close() the document. Caveat: You'll notice that pages 3 and 4 are in landscape, yet there is a difference between

How to create a table with rounded corners?

, 4); drawContext.getCanvas().stroke(); super.draw(drawContext); } } You can of course fine-tune the values 1.5, 3 and 4 to get

pdf2Data: Add support for tables using ASCII line symbol separators

shows a table drawn using horizontal ASCII lines: image2021-4-7_16-55-50.png The resulting template shows the following

How to define different border types for a single cell?

table; Cell cell; table = new Table(4); table.setMarginBottom(30); cell = new Cell().add("left border"); cell.setBorder

How to add text to an image?

the table, my pdf PDF document has 3 pages. Now I want to add a signature image and add some text on that signature image using

Why do I get a font embedding error when creating PDFA/1a?

. Every PDF viewer should be able to render text that uses those fonts, hence these fonts don't need to be embedded: 4 Helvetica

How to make a particular sub-string Bold when converting HTML to PDF?

a suitable method for this. How should I do this? Posted on StackOverflow on Jun 4, 2014

pdfHTML: more accurate rendering of checkboxes

as shown here: image2022-4-7_17-36-10.png In pdfHTML release 4.0.2 we have addressed the margin issue, and the checkbox will now

How to disable the save button and hide the menu bar in Adobe Reader?

" as well. What you need to do is not to prevent saving, but to control the actual use of the PDF and that's where Digital Rights

How to show an image with large dimensions across multiple pages?

an image at its original size and it tiles it over 4 pages: tiled_image.pdf

Why aren't images added sequentially?

2 image topic 2 topic 3 topic 4 page 2: image topic 3 image topic 4 topic 5 image topic 5 So the order of the elements on paper

pdfHTML: support for inline-block with a width percent value

) would convert the HTML above into the following PDF output: image2021-4-6_14-32-57.png As you can see, the specified width

pdfHTML: Fixed Behavior for <input> Tags with Negative Numbers

html>\n" + "<html>\n" + "<head>\n" + "</head>\n" + "<body>\n" + "<div><label>Label</label><input type=\"number\" value=\"-4\">\n

How to show an image at a text field position?

I have a PDF document which has AcroForm text fields. Now I want to insert a signature image in one of the those fields. I

How to add text at an absolute position on the top of the first page?

(template)); Now we can add as much data as we want: for (int i = 0; i Adding 100 "test" lines will cause iText 7 to create 4 pages

How to align a label versus its content?

with columns for which we define an absolute width. We use the previously calculated width for the first column, but we add 4, because

How to create hierarchical bookmarks?

(getDTO(243,"Node-3",239)); tree.add(getDTO(244,"Node-4",242)); tree.add(getDTO(245,"Node-5",243)); I am able to display above data

How to continue field output on a second page?

))); PaginationEventHandler is looking like this: Java C# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 protected class PaginationEventHandler

How to use a dotted line as a cell border?

. For the first table, we use a table renderer: Java C# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

How to create a nested column?

)); cell.setBorderBottom(new SolidBorder(1)); } if (4 == (border & 4)) { cell.setBorderLeft(new SolidBorder(1)); } if (2 == (border & 2

How to set up a table display?

, TextAlignment.RIGHT)); table.addCell(createCell(row[4], 1, 1, TextAlignment.RIGHT)); } table.addCell(createCell("Totals", 2, 4

How to rotate and scale pages in an existing PDF?

for /Rotate is 90) into portrait (the default value for /Rotate is 0). You'll notice that this doesn't have any effect on page 4

Where is the origin (x,y) of a PDF page?

. For instance: suppose that you want to create an A2 document consisting of 4 A4 pages, than you could define the page sizes like

Release iText 7.1.9

for latin text and floating images pdfXFA: signature fields are missing after flattening pdfXFA: Java vs .NET difference in state

How do the measurement systems in HTML relate to the measurement system in PDF?

that there is no universal definition of a point, it is safe to assume that 1 point is 1/72 of an inch, or: 1 in. = 25.4 mm = 72 pt. In d

Which version of the license key library should I use?

version 4.x.y of the license key library If you're using iText 7 Suite version 7.1.17 (or older) or iText 5.5.13 (or newer

Creating and editing PDF 2.0 Documents

!")); document.Close(); iText is more than capable of editing an existing PDF 2.0 document and doing things like adding a signature or add

Basic Concepts (Glossary)

Electronic Signatures (PAdES) ZUGFeRD: a standard for invoices that combines PDF/A-3 and the UN/CEFACT Cross Industry Invoice (CII

What is the difference between getPageLabels and getPageLabelFormats?

(); The PageLabelNumberingStyleConstants enumeration in iText 7 can be used when creating page labels like this: pdfDoc.getPage(4).setPage

How can I read Roman page numbers?

) { out.println(textLabel); } out.flush(); out.close(); reader.close(); } The result will be the following: A B 1 2 3 Movies-4

How to underline text with a dotted line?

)).setMarginTop(-4)); doc.close(); In this example (see underline_dotted.pdf

How to write a Zapfdingbats character at a specific location on a page?

on StackOverflow on May 4, 2013

How to add an image to an existing PDF using AffineTransform?

], matrix[1], matrix[2], matrix[3], matrix[4], matrix[5]); pdfDoc.close(); } In this example, I start with a translation: 36 user units

How to reorder the pages of a PDF file?

are now in this order: page 1, page 13, page 14, page 15, page 2, page 3, page 4, page 5, page 6, page 7, page 8, page 9, page

How to nest tables without extending the inner table?

(innerTable1); innerTable2.addCell("Cell 3"); innerTable2.addCell("Cell 4"); outerTable.addCell(innerTable2); cell = new Cell(1, 14

How to define spacing and leading in PdfPCell objects?

); p = new Paragraph("paragraph 4: leading 18. Text to force a wrap and check the leading. Ha-ha").setFixedLeading(18); cell.add(p

How to display indian rupee symbol?

on StackOverflow on Jul 4, 2013 https://stackoverflow.com/questions/17465183/how-to-display-indian-rupee-symbol-in-itext-pdf-in-mvc3

How to change the order of Optional Content Groups?

, groupedLayers); pdfDoc.close(); } In my example, the order array contains 4 elements. I get these four elements, and I change

How to introduce superscript?

") .add(nd) .add(" and the 3") .add(rd) .add(" of June"); document.add(second); Paragraph fourth = new Paragraph() .add("The 4") .add

How to set the page size to Envelope size with Landscape orientation?

of a 6-1/4 Commercial Envelope https://www.paper-papers.com/6-14-Commercial-Envelopes-24lb-WHITE-WOVE-35-x-6.html, then you need

How to continue an ordered list on a second page?

a situation where the list begins with #1 on the first page and then #2-4 on the top of the second page. I use two different

.How to add a border to a PDF page? vLatest

); rect.enableBorderSide(4); rect.enableBorderSide(8); rect.setBorder(2); rect.setBorderColor(BaseColor.BLACK); document.add(rect

How to add a border to a PDF page?

); rect.enableBorderSide(4); rect.enableBorderSide(8); rect.setBorder(2); rect.setBorderColor(BaseColor.BLACK); document.add(rect

How can I find the border color of a field?

an option to get border color from there. Posted on StackOverflow on Feb 4, 2015

Why are the AcroFields in my document empty?

your PDF in iText 7 using this code sample: Java C# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PdfReader reader = new PdfReader(imgSrc

How to fill out a PDF file programmatically? (Dynamic XFA)

https://github.com/itext/i7js-book/blob/develop/src/main/java/com/itextpdf/samples/book/part2/chapter08/Listing_08_28_XfaMovies.java: Jav

I upgraded to iText 7, how do I use my license?

and will require version 4.x.y of the license key library. If you are using iText 7.1.17 or older you should have a license key

Release iText 7.1.3

https://jira.itextsupport.com/browse/DEVSIX-1850] : Review signature appearance implementation. [DEVSIX-1860

pdfHTML: Support for overflow-wrap, word-break CSS Properties

.</p> <br> <p class="label">4. <i>overflow-wrap: break-all;</i></p> <p>I frolick happily down by the sea shore. I <i class="word

Volume Counter installation guide

licensing-base and licensing-remote dependencies, and the version number for the licensing libraries was increased from version 3.x to 4

Why is my font not applied when I create a PDF document?

> // step 3 document.open(); // step 4: Font font = FontFactory.getFont("Agenda Tabular Light"); System.out.println

Is it possible to attach multiple layout events to a PdfPCell?

(Color.ORANGE) .rectangle(rect.getLeft() + 80f, rect.getBottom() + 5f, rect.getWidth() - 160f, rect.getHeight() - 10f); break; } case (4

How to close a PDF file to recreate it? (File in use problem)

this error: java.io.FileNotFoundException: Archivio_Etichette_12-4-2015.pdf (Impossibile accedere al file. Il file è utilizzato

How to allow page extraction when setting password security?

in iText: bit 1: Not assigned bit 2: Not assigned bit 3: Degraded printing: ALLOW_DEGRADED_PRINTING bit 4: Modify contents

How to create a TOC when merging documents?

); stamp.alterContents(); copy.addPage(page); } } document.close(); Posted on StackOverflow on Feb 4, 2014

How to set a fixed background image for all my pages?

Click, I generate 4 pages on my PDF, I added this image to provide a background image: string imageFilePath = parent + "/Images

How to change the zoom factor in link annotations?

(d.getAsName(1))) d.set(4, new PdfNumber(0)); } } Now you will have a file such as xyz_zoom.pdf

Why does iText enter a cross symbol when CheckType style is check mark?

); break; case 3: checkBox.setCheckType(PdfFormField.TYPE_DIAMOND); break; case 4: checkBox.setCheckType(PdfFormField.TYPE_SQUARE

How to define the width of a cell?

user units wide. Option 2: You define an absolute width. Suppose that you are asked to create a table with a width of 4 inches

How can I load a font from /WEB-INF/resources/fonts/foobar.ttf?

supply a path of /fonts/foobar.ttf. String path = "/fonts/foobar.ttf"; PdfFontFactory.register(path); --- 4. In case none of above

How to draw a borderless rounded rectangle?

, 210, 100, 100) .stroke(); pdfDoc.close(); } This piece of code shows 4 different ways of creating rectangles. Click How

How to tell iText which fields to flatten first?

("sunday_2").setValue("2"); fields.get("sunday_3").setValue("3"); fields.get("sunday_4").setValue("4"); fields.get("sunday_5

.How to create a table based on a two-dimensional array? vLatest

Paragraph("Cell 4")); PdfPCell cell5 = new PdfPCell(new Paragraph("Cell 5")); PdfPCell cell6 = new PdfPCell(new Paragraph("Cell

How to create a table based on a two-dimensional array?

Paragraph("Cell 4")); PdfPCell cell5 = new PdfPCell(new Paragraph("Cell 5")); PdfPCell cell6 = new PdfPCell(new Paragraph("Cell

What's an easy to print "first right, then down"?

have cells A1 to M5 on page 1, cells N1 to Z5 on page 2, cells A6 to M10 on page 3, cells N6 to Z10 on page 4, cells A11 to M15

Release pdfOCR 1.0.0

on the open-source Tesseract 4.x https://github.com/tesseract-ocr/tesseract project to do the heavy lifting, we couldn't

Where can I download the license key library?

dependencies, and the version number for the licensing libraries was increased from version 3.x to 4.x. In addition

How to add a background image to a cell?

in a more efficient way, but I order the code lines in a way so that they reflect your requirements 1, 2, 3 and 4 literally. OK

How to get the color properties of an AcroForm field?

in which the colour shall be defined: 0 No colour; transparent 1 DeviceGray 3 DeviceRGB 4 DeviceCMYK BG array (Optional): An array

How to shrink pages in an existing PDF?

and we take the crop box of each page. If there is no crop box, we take the media box. These boxes are stored as arrays of 4

How to create and apply redactions?

and eventually apply redaction. Posted on StackOverflow on Jun 4, 2014

How to convert colored images to black and white?

here is important. You don't want the setData() method to tamper with the length and the filter. Step 4: persisting

How can I generate a PDF/UA compatible PDF with iText?

tutorial https://www.youtube.com/watch?v=9b-ikCV_z8A. Java C# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Volume Counter FAQs

dependencies and the version number for the licensing libraries was increased from version 3.x to 4.x. In addition, it replaces the old

Release iText 7.1.2

https://jira.itextsupport.com/browse/DEVSIX-1866] - 4 FindBugs bugs in styled-xml-parser [DEVSIX-1869

iText 7.1 - Migration guide for Java

constants have found a home in com.itextpdf.kernel.pdf.tagging.StandardRoles 4. Moved packages, classes, fields and method

iText 7.1 - Migration guide for .NET

a home in iText.Kernel.Pdf.Tagging.StandardRoles 4. Moved packages, classes, fields and method The following things have been

Release iText 7.1.11

) [CORE] itext7-dotnet PR #4 https://github.com/itext/itext7-dotnet/pull/4: Path transformation to userspace (thank you Moneema14

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