• Global community
    • Language:
      • Deutsch
      • English
      • Español
      • Français
      • Português
  • 日本語コミュニティ
    Dedicated community for Japanese speakers
  • 한국 커뮤니티
    Dedicated community for Korean speakers
Exit
0

NeoID (Brazil gov. A3 cloud certificate) does not work fine when signed on Acrobat (Pro/Reader)

Explorer ,
May 20, 2022 May 20, 2022

Copy link to clipboard

Copied

Hi team,

I am trying to sign document using my Adobe Acrobat DC Pro and it always reports that "the document has been altered or corrupted since the signature was applied".

 

The chain certificate is fine, and when certified using another application like PDF-XChange it validated fine on Adobe Acrobat. The problem is when sign it using Adobe Acrobat.

Please, how can we fix this issue?

 

Adobe Acrobat DC Pro version 2022.001.20117

Note: This "cloud" certificate works like any local certificate, when you sign it locally, instead of asking for a pin, it asks to confirm its 2FA prompt approval on a mobile app.

 

In attach:
screenshot "error signed by Adobe Acrobat DC Pro.png"

screenshot "pass signed by PDF-XChange.png"

 

Thanks a lot and regards

TOPICS
General troubleshooting , Security digital signatures and esignatures

Views

1.2K

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines

correct answers 2 Correct answers

Enthusiast , May 21, 2022 May 21, 2022

The signed hash in your signature value is incorrect.

This hash value is calculated for the signed attributes of the CMS signature container embedded in your PDF.

These signed attributes are exceptionally large in your case. This is due to the embedded certificate revocation lists (CRLs).

Some signing devices (in your case the cloud signing API) may have restrictions in respect to the amount of data sent through them for signing.

Thus, I'd propose you try signing again without embedding certificate

...

Votes

Translate

Translate
Explorer , May 22, 2022 May 22, 2022

Plot twist:

Using CAdES signing format AND without signature revogation it is valid 🙂

Thank you!!

 

ivancarlos_0-1653243938297.png

 

 

Votes

Translate

Translate
Enthusiast ,
May 20, 2022 May 20, 2022

Copy link to clipboard

Copied

Can you share the corresponding PDFs for analysis?

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Explorer ,
May 20, 2022 May 20, 2022

Copy link to clipboard

Copied

Follow in attach

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Enthusiast ,
May 21, 2022 May 21, 2022

Copy link to clipboard

Copied

The signed hash in your signature value is incorrect.

This hash value is calculated for the signed attributes of the CMS signature container embedded in your PDF.

These signed attributes are exceptionally large in your case. This is due to the embedded certificate revocation lists (CRLs).

Some signing devices (in your case the cloud signing API) may have restrictions in respect to the amount of data sent through them for signing.

Thus, I'd propose you try signing again without embedding certificate revocation information.

You can switch this off in the Preferences, category Signatures, frame Creation & Appearance, press button More..., de-select checkbox Include signature's revocation status.

(As an aside, PDF-XChange did not embed the CRLs, either.)

If you need LTV-enabled signatures in the end, you can also add revocation information afterwards in an incremental update.

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Explorer ,
May 22, 2022 May 22, 2022

Copy link to clipboard

Copied

Thanks a lot for the troubleshooting, but the issue persists 😕

There's something on Acrobat side for this issue. The 2FA approval made on cloud is only for pin authentication, no data from application is sent with the authorization, and the approval comes back to computer correctly, the signature is valid, the problem is that Acrobat reports that the document was modified. 

 

ivancarlos_0-1653243411901.png

 

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Explorer ,
May 22, 2022 May 22, 2022

Copy link to clipboard

Copied

Plot twist:

Using CAdES signing format AND without signature revogation it is valid 🙂

Thank you!!

 

ivancarlos_0-1653243938297.png

 

 

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Enthusiast ,
May 22, 2022 May 22, 2022

Copy link to clipboard

Copied

Great!

This sounds very weird though. Adobe QA really should look into this.

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Explorer ,
May 20, 2022 May 20, 2022

Copy link to clipboard

Copied

This in attach was signed on PDF-XChange and there is no issue validating it on Acrobat

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
New Here ,
Jul 26, 2022 Jul 26, 2022

Copy link to clipboard

Copied

LATEST

I had the same issue guys, it seams like the A3 on cloud certificates will generate invalid signatures with the default options. After changing the preferences accordingly @ivancarlos tips, the generated signature was valid. Thank you for sharing.

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines