Digital Signature In Yii
Posted 17 December 2012 - 05:14 AM
As a newbie, I am going to ask a stupid question again. In my current project, I have to make website mixed with google docs, dropbox and mediafire. In addition, when a user will submit a file, that file will be checked whatever the file is digitally signed or not (http://en.wikipedia....gital_signature).
Now, I need to show that, one file format (either doc or pdf) will be examined to determine that, is it digitally signed or not ? I read the doc file but there is no difference between a signed file and a unsigned file in reading. I thought I would try it in OPENSSL(php), but I did not find any document which indicates doc file can be read for digital signature.
Now, my alternative is java, C#, asp.net. But, I do not know whatever it is possible in any of this one?
In a word, my question is, How to get information of digital signature from a doc/pdf file and how can i verify its signed or not?
ANY OPINION will be a plus point for me (as a newbie, i am in big trouble).
THANK YOU VERY MUCH FOR READING THIS and sorry for my bad English.
Posted 17 December 2012 - 06:43 AM
Posted 17 December 2012 - 06:59 AM
THANKS A LOT Da:Sourcerer. Can you give me some link on getting digital certificate information from pdf. I wanted to do it in doc, but if i can do it in pdf, i will get some idea. Thanks a lot again, i am completely new and hopless
Posted 17 December 2012 - 07:34 AM
Thanks a lot, .... I am trying......
Any more opinion will be most welcome ///
Posted 17 December 2012 - 07:39 AM
Posted 18 December 2012 - 03:29 AM
Posted 19 December 2012 - 06:12 AM
Yes, metadata is out of question. I need to separate the digital certificate (P7B) from the file. do you know how and where the MS Word stores the digital signature? Anybody?
AND THANKS Da:Sourcerer
Posted 08 January 2013 - 03:38 AM
All i did, I make jar file where I used iText to read the signature, validate the signature, validate the certificate of the signature using bouncy castle and finally call the jar file to validate all