Converting signature

hi,
if i want to write a signature (DSA) to a file in string , how do i extract and convert it again to a signature in byte[] ???
thank

- Write the DSA signature in Base-64 or hexadecimal to a file (do not write the bytes directly using the new String(byte[]) constructor)
- If you've instanced an object of the java.security.Signature class (maybe by using Signature.getInstance()), you know that .sign() returns a byte array containing the raw signature, and .verify() takes as a parameter the byte array that was returned by .sign()

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Converting Signature data into PKCS#7 format

Hi All,
Is there any java api available to convert signature bytes in to PKCS#7 format.
Here is the scenario.
downloaded a trail digital id(abc.pfx) file from verisign site.
then retrieved the private key, certificate and public key information from the pfx file.
with the help of private key and pdf data, digital signature created.
Sample code:
KeyStore keyStore = KeyStore.getInstance("PKCS12");
// aa.pfx is the Digital ID got from VeriSign
keyStore.load(new FileInputStream("aa.pfx"), storepswd);
for(Enumeration e = keyStore.aliases() ; e.hasMoreElements() ;) {
alias = e.nextElement().toString();
PrivateKey privKey = (PrivateKey)keyStore.getKey(alias, storepswd);
java.security.cert.Certificate cert = keyStore.getCertificate(alias);
PublicKey pubKey = cert.getPublicKey();
Signature rsa = Signature.getInstance("MD5withRSA");
rsa.initSign(privKey);
/* Update and sign the data */
FileInputStream fis = new FileInputStream("Testing.pdf");
BufferedInputStream bufin = new BufferedInputStream(fis);
byte[] buffer = new byte[1024];
int len;
while (bufin.available() != 0) {
len = bufin.read(buffer);
rsa.update(buffer, 0, len);
bufin.close();
/* Returns the signature of all the data updated*/
byte[] rsaSign = rsa.sign();
now i want to convert this signature(rsaSign bytes) in to PKCS#7 format and embed in to pdf file. so acrobat reader can verify the signature in pdf file.
I've found the PdfSignature class in the iText lib. But it is poor.
so plz let me know if any body know how to convert signature in to PKCS#7 format. any sample code or any URL.
Thanks in Advance.
Subhani.

Use BouncyCastle provider
http://www.bouncycastle.org/docs/mdocs1.4/index.html
The package: org.bouncycastle.cms
Download the package and get the examples in the package org.bouncycastle.cms.test .
(CMS stands for Cryptographic Message Syntax and is defined in RFC 3369, and is an evolution of PKCS#7 v. 1.5, that is defined in RFC 2315. )

Baseline tiff

Hi,
When i want to use the program RSTXLDMC to create a standart text of tiff picture file, i get the following error message:
TIFF format error: No baseline TIFF 6.0 file
How to convert signature.tif file to baseline tiff 6.0? Is there any program in sap for this?
Thanks.
deniz.

Hi,
check this link.
link:[TIF file upload error;
[Error in Program RSTXLDMC;
or
try with Adobe Photoshop or Micorosoft Photo editior
and save it as Tiff file.
hope it'll help u.
Regards,
Sneha.
Edited by: sneha kumari on Jun 18, 2009 12:42 PM
Edited by: sneha kumari on Jun 18, 2009 12:44 PM

PDF differences (Microsoft and Adobe)

Hi,
Can anyone tell me what the differences are between PDFs generated by the normal Microsoft Office, File --> Save As --> PDF option and those generated by Acrobat (e.g. from the Office Acrobat menu, or by dragging the Office document onto Acrobat)?
Rgds
Mike

Hi,
We had done some analysis and following are the specific areas where Acrobat PDFMaker outdoes MS “Save as PDF” functionality –
Word
Comments are retained as annotations in PDF, which can be exported back to the original Word document later.
Word Headings, Styles and Bookmarks can be retained in PDF using PDFMaker. MS “Save as PDF” provides the option to retain either Word Headings or Word Bookmarks, only one option at a time.
Retains intra/inter-document links, cross-references, endnotes and footnotes as links.
Creates rich accessible PDF(s).
Retains embedded Flash as RichMedia in PDF.
Mail Merge: Merge mail templates to Adobe PDF and optionally, mail them to recipients.
Import Comments: Import comments from the corresponding PDF back to the original Word document.
Convert signature fields specified by PDFMarks.
[Common to Word, Excel, PowerPoint]
Provides a list of Conversion Settings including –
PDF/A, PDF/X standards to choose from.
Various Joboptions to modulate the quality of output PDF.
Advanced Settings option to create customized Joboptions to control PDF compatibility, image compression algorithms, etc.
Option to secure output PDF with open password and/or password for editing PDF. Compression algorithms used depends upon the compatibility level set in the JobOption used:
Acrobat 4 – 40-bit RC4
Acrobat 5/6 – 128-bit RC4
Acrobat 7/8 – 128-bit AES
Option to attach source Office document.
Retains document information, including custom information.
Options to – a) Create and attach to Email, b) Create and Share for Review c) Create PDF and Run action
Excel
Provides option to either a) choose sheets to convert, b) selection or c) Entire Workbook.
Comments are retained as annotations in PDF.
Retains intra-document references as links in PDF.
Bookmarks worksheets.
Creates rich accessible PDF(s).
Provides options to: “Fit Worksheet to a single page”, “Fit to paper width” that helps preserve the look-and-feel of the source Workbook.
PowerPoint
Retains embedded Video, Audio and Flash as RichMedia in PDF.
Converts hidden slides as PDF pages.
Preserves slide transitions.
Creates rich accessible PDF(s).
Preserves Speaker Notes as annotations in PDF.
Bookmarks slides.
Retains intra/inter-document links.
Outlook
[Please NOTE, MS does not have a “Save as PDF” functionality for Outlook.]
Archive email conversations to structured PDF Portfolio(s), retaining folder/message information.
Retains attachments.
Creates indexed archives for faster search.
Let’s archival to be automated, providing options for it to be Daily, Weekly or Monthly.
Attach as Adobe PDF:
Attach as Secured Adobe PDF:
Thanks to my colleague who provided this info months ago. Hope this help.

I need to convert few pages of a large pdf files, insert a signature then send as an email.

Is this possible with this product? I'm not having much luck so far...
What are the steps to convert pdf files in the first place? I get them via email so do I:
First download the whoe pdf file
then upload it to ExportPDF,
then convert it to Word or Excel
then save
then delete pages I don't need?
I tried it and it look like a mess and I couldn't figure out how to select pages to delete....
So I gave that up and just tried to go to the pages I need to update and the formatting gets all goofy when I try to enter info. Font is too small, if I make the font bigger, then it gets lopped off the top or it really messes up the formatting more!
And then I realize that the pages I work on need my signature. Is there a way to add that?
Otherwise, I will be needing to do what I'm trying to avoid doing which is having to print the forms, filling them out, signing them, then scanning so to email to my recipient. It wouldn't really be a timesaver.
Any advice?

Absolutely disappointed in trying to make this work. Wasted 3 days trying
to use the product and ended up cancelling the order as it was more time
consuming and error prone than just printing the pdf file out itself and
handwriting in what I need.
I thought this is what Adobe Export PDF is suppposed to be able to do.
There are no tutorials on this so I signed up for it on good faith and it
was so reasonably priced too ... boy what a let down.
I would not recommend this particular product to anyone and I will send
Adobe my review separately.

How to deal with digital signatures when converting messages?

Hi there,
this it not (yet) about the actual implementation. It's more of a logical problem that I'm facing.
There are two partners A and B. A is sending an EDIFACT document which is digitally signed to B.
B has a XI instance that is converting all incoming messages into IDocs, in this particular case INVOIC. This IDoc is received by the R/3 system.
All invoices must be archived due to an eventual tax inspection.
In order to fulfill the security requirements all archived data must be digitally signed.
So far so good.
I guess I'm not allowed to sign my invoices with my own private key due to the fact that i could alter the containing data and sign it again.
It's obvious that I cant apply the digital signature from the EDIFACT message to my IDoc because the data has changed and therefore the signature is invalid.
The only solution to this problem, that I can imagine, is to archive EDIFACT alongside IDoc.
Have you experienced a similar problem or do you have any other idea in order to solve this issue?
I hope my problem is well defined.
Any comment is appreciated.
Thanks in advance
Bastian Stratmann

Hi Bastian,
it is not possible to separate the signature from the document signed.
The system A generates and EDIFACT message -> A has the responsibility on this message and so A sign it.
XI manipulate the message received from A, that means XI generates a new message. -> XI has the responsibility on it, so if you want a signature this should be generated by XI.
As the IDoc was generated by XI it cannot be signed by A (neither technically nor logically) because A has no responsibility on it.
XI <b>is</b> altering the message so XI is responsible for it.
In this case you have to store both the EDIFACT message and the IDOC and maybe sign this new document (EDIFACT+IDOC) with XI signature .
Kind Regards,
Sergio

How do I fix the signature on the bottom of my letter? When I converted from pdf to Word it messed it up?

I cannot figure out how to fix the signature on my document....I converted the doc from pdf to Word and now the signature is all messed up!

Hey Keli,
Please let me know whether you are using Adobe Reader or signed up at "https://cloud.acrobat.com/fillsign" for the same.
If possible, please share the file with me so that I can check at my end.
I have sent you a private message with my Adobe ID details.
Hope to hear from you.
Regards,
Anubha

How to convert a pdf file with hand-written signature?

How to convert a pdf file with hand-written signature?

Hi Lotus1215,
Once the document is signed we cannot edit that document, hence convertion is not possible
Please see the article mentioned below
http://forums.adobe.com/docs/DOC-1515
Let me know if you have any other question.
Regards,
~Pranav

Convert Digital Signature in Word to PDF

Dear Expert,
I create digital signature in Word 2010, can I convert Word file to PDF file. and Using Adobe PDF reader to sign the digital signature.
Can we do it?
Thank you

Hi,
can I convert Word file to PDF file
You can use the Save As option to convert Word file to PDF file.
Using Adobe PDF reader to sign the digital signature
It should be possible, but I suggest you refer to Adobe support to get more professional support on this matter.
http://helpx.adobe.com/contact.html
Please Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Best Regards,
Amy
Please remember to mark the replies as answers if they help and un-mark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected]

Convert scanned signature into line drawing

I have a need to convert scanned signatures into line-drawings. I could buy MIcrosoft Illustrator (or something) to do it, but I was wondering if anyone knew of a free-ware Java tool that could do this.
It would work somehting like the following:
1. Sign your name on a white piece of paper.
2. Scan the image and store it as an jpeg file.
3. A program (hopefully free in Java) would read in the image and output one of the following:
a) output to another jpeg file where the signature had been converted to line-drawings (so the lines are thiner and more crisp than the scanned image)
b) output the vector coordinates that could be read into another custom program that could dynamically create the jpeg (I know how to write this jpeg-creatio program from coordinates...).
thanks,
Jeff

For starters, using JPEGs in this situation is a poor choice because it is a lossy format.
Second, it seems like what you're after is something like OCR. I think I asked a question once about OCR for java... I think I remember someone telling me that it's out there. But anyway search the web for that.
Even if all you're interested in is code that will smartly 'correct' an image I don't think that there is freely available code (might not be any Java code at all) to do this.

I'm trying to convert a PDF to Word, but it won't copy signatures over, just get gobblygook... any way I can convert with an image of the signatures?

I'm trying to convert a PDF to Word, but it won't copy signatures over, just get gobblygook... any way I can convert with an image of the signatures? I tried Word, RTF etc but they all come out the same. Help!

Hi newromancer65,
Would you send your document as an email attachment?
I will check it from my end.Please add the link to this forum post for reference.
I have sent you my contact details on your email id.
Regards,
Florence

How do you convert a signature field to a normal field?

when Acrobat autodetects form areas, it also detects where signature lines are and puts a special field on that. How do I convert that to just a normal text field?

Bernd Alheit wrote:
Delete this field and create a new text field.
I was trying to avoid that because I have things lined up perfectly and its hard to redraw field to be "perfect". I would think there would be a simple function to turn that signature thing off though

Is the digital signature conserved from a signed .docx converted to .pdf ?

Hi!
I would like to know, before purchase or even try Acrobat XI Pro, the folowing question:
If I sign a Microsoft Word (2010) .docx, and then I convert it to Adobe .pdf with Acrobat XI Pro; is my digital signature yet considered always as a signature, or have I to re-sign it in Acrobat ?
(I think it should have to be conserved, to be really a signature, but am not sure about the technical apsects.)
Thank you in advance for your answers.

Ok, Thank you a lot, Test Screen Name !
Yes, I was actually considering the case of a really digital signature (not only a scribble), of course.
So I understand that the digital signature is not conserved as such trough this conversion.
I am french speaking, and I took a moment to understand you second paragraph... which seems to be obvious enought, indeed:
Yes it would be useful to recognize the signature form a Word converted to a Pdf, but it could mean that, if the signature is identified as such - I was no thinking about to get back the signature separately -, a simple conversion of a .docx in .pdf would be an alteration of data integrity (so, not anymore data intergrity could be garanted).
It was clear for me that a signature meant more or less explicitely, that the file could not be modified. But I was very innocent to consider a file only for its "visible characters", rather than the file format, which is also a part of data integrity - of course...
Allright, your answered perfectly to my question, I'll vote for you, as helpful, and correct.
Tank you one more time !

How to convert Cisco IPS signatures to a MARS events - no keyword search

I am trying to run a scheduled report looking for the new Microsoft exploit under the IPS S411 release, SIGID 19339.0 and I am trying to form the query looking for the event this falls under without using a keyword search on the SIGID. Does anyone know how to correlate an IPS signature to a MARS event?
Thanks,
Mike

With the help of On-box local event correlation technology you can correlate. On-box local event correlation technology not only enables detection, but actually blocks multi-event attacks and malware in real time, complementing security incident management software such as the Cisco Security Monitoring, Analysis, and Reporting System (Cisco Security MARS) that correlate events across multiple devices.
Integrates with the Cisco Security Manager to correlate security events with the configured firewall rules and intrusion prevention system (IPS) signatures that can affect the security event

Convert/save/export Adobe Edge animation as an animated gif?

Does anyone know a way to convert/save/export an Adobe Edge animation file into an animated gif. I've created a simple logo animation and the client now wants it as a animated gif to add to there email signature. Is this possible or an I going to have to recreate it in another programme

Hi resdesign.
Thanks for your comment, this helped. Would be nice if there was a more direct way though, but this has done exactly what I need. Thanks again

Converting signature

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