itext7

Why is one of these two itext 7 signed and validated document is not valid with Adobe DC reader?

This is not an Adobe bug, it’s a feature. (And an iText bug) When Adobe performs the cryptographic validation, it will also perform additional checks to see if a signature was attacked or not. It analyses several suspects and if that analysis turns out negative, Adobe will show you an error message. This is Adobe … Read more

Manipulate paths, color etc. in iText

Now, what’s the way to go with manipulating things and writing them back to the PDF? Do I have to construct an entirely new PDF document and copy everything over (in manipulated form), or can I somehow manipulate the read PDF data directly? In essence you are looking for a class which is not merely … Read more