C# Verifying digital signature in .xlsx and .docx files

I need one web application developed in c# (ASP.NET), using only classes from .Net Framework API, without use of API of other commercial companies.


Necessary files are .xlsx and .docx files (MS Office 2007 and 2010)

The user should be able to choose a file with FileChooser.

After choosing of a file:

--- if a document does not contain a digital signature, the program should report about this to the user (Warning).

--- if a document contains a digital signature, the program must read data of digital signature and of Certificate and must inform the folowing data to the users:

1) Who signed the document;

2) Date of signature;

3) Which organization issued a certificate;

4) Validity of a certificate;

5) Status of the digital signature

I want to buy SourceCode of this web application. The SourceCode must be written clearly and distinctly.I want to integrate this web application into my website

Kemahiran: Pengaturcaraan C#

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Tentang Majikan:
( 0 ulasan ) Georgia

ID Projek: #1582516

5 pekerja bebas membida secara purata $20100 untuk pekerjaan ini


Hi! Can you give me example about digital signature?

$99999 USD dalam 0 hari
(6 Ulasan)

i am an experienced c# programmer, i haven't done signature verification before but i know i can try n do it.

$150 USD dalam 5 hari
(0 Ulasan)

Ready to start

$200 USD dalam 7 hari
(0 Ulasan)

Hi, I am interested to do this project. I am expert in ASP.net and C#. worked on various web & windows application during my 8+ yrs of experience.

$100 USD dalam 15 hari
(0 Ulasan)

Hi. I can do this for you, see pm.

$50 USD dalam 5 hari
(0 Ulasan)