Questions tagged [signature]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
1answer
39 views

Trying to verify Wasabi-1.1.12.3.deb but it won´t find the file (THE FILE IS THERE)

Ey there, So, i have been trying for hours to install wasabi in ubuntu without success. Having downloaded the files and following the guide i get to the point of not being able to verify the freaking ...
1
vote
1answer
23 views

How do I sign a file with my smartcard on Ubuntu 20.10?

I own a latitude E7240 with a smartcard reader (broadcom 5880), running Ubuntu 20.10, and a smartcad with a qualified certificate which I want to usu to digitally sign files. Cardpeek correctly sees ...
0
votes
0answers
28 views

Topaz Signature pad on Ubuntu 20.04. Any help?

I have a Topaz Signature pad that I was able to use via Windows, but I can't get it to work on Ubuntu 20.04. Any help? I see that Topaz Systems does offer the following: a C Library and a SigPlus ...
0
votes
1answer
35 views

Where can I find Xubuntu 20.04 LTS public key?

This to be spesific, from here.
0
votes
0answers
35 views

Does client OS verify packages downloaded from Ubuntu main repository? [duplicate]

Packages seem to be downloaded over http from the Ubuntu main repository, so I was wondering whether the client's OS verifies the packages once downloaded? If so please could someone outline the ...
0
votes
0answers
19 views

How to get a crisp clear email signature on Mozilla Thunderbird

I'm having huge difficulty finding a file format to build my email signature in for Mozilla Thunderbird that results in a nice crisp clear image. I've tried building it as a PNG, HTML, Illustrator. ...
0
votes
0answers
12 views

What is a easy way to sign a Apt package

I built my own linux shell and I built the package I can install it with apt install sturtzshell and it runs like it is supost to when you type sturtz But When I run edited the /etc/apt/sources.list I ...
0
votes
0answers
273 views

Ror 10 verifying signature error on 20.04LLTS

I updated to TOR 10 the other day (at its own prompting). I'm on a refurb computer running 20.04 LTS. Everything was fine at first but then I login today and it's a mess. It refuses to verify ...
0
votes
1answer
99 views

In Claws-mail, how to put the signature above quoted text in a reply

In Lubuntu 20.04.1, I'm using Claws Mail 3.17.5 I'd like to be able to click reply and have the cursor position at the top of my message with my signature followed by the quoted text.
0
votes
0answers
63 views

How to digitally sign a PDF with a usb etoken?

I’m trying to digitally sign a complex PDF that already has a bunch of other trusted signatures, with my own signature? On Windows and Mac I would use adobe reader, open the pdf, draw a rectangle ...
0
votes
1answer
279 views

What exactly does a BAD signature mean?

About 16 hours ago I downloaded the Ubuntu 18.04.5 image from releases.ubuntu.com alongside its checksum file and GnuPG signature. Verifying the checksum file using the signature results in a BAD ...
1
vote
1answer
199 views

Bad signature on verifying the 18.04.5 sha256 checksum

I was following the "How to verify your Ubuntu download" tutorial to verify the ubuntu-18.04.5-desktop-amd64.iso download. After the following command gpg --keyid-format long --verify ...
4
votes
0answers
232 views

Having trouble upgrading from 18.04 to 20.04 likely due to lack of valid signature on older unsupported versions [duplicate]

For background, yesterday I tried to upgrade from 18.04 to 20.04 using the itsfoss guide and immediately ran into trouble. My cpu exceeds system requirements, however, it came with Win 10 and I dual-...
1
vote
0answers
64 views

signature pads (Wacom ?)

Is the signing of sheets on signature pads supported under Ubuntu ? In our shop, this is a widespread use case and it's currently based on Windows Is an equivalent solution available under Ubuntu ? It ...
0
votes
0answers
29 views

sound problem / kernel signature

I have an asus zenbook ux430unr, and I would like to use ubuntu on it. I installed ubuntu 20.04 and unfortunately the sound card is unsupported on its kernel version (5.4.0-37-generic). So I installed ...
3
votes
1answer
164 views

How to remove (adobe) digital signature from PDF

This follows up my previous question: How to check if PDF has been digitally signed?. Just in doubt a document has been digitally signed (e.g. with Adobe), how to remove the signature? In particular, ...
1
vote
0answers
214 views

How to check if PDF document has been signed (probably with Adobe)?

I'm on Xubuntu 18.04.4 LTS. I received a document, then forwarded it to other people who should be able to modify it. However digital signatures might prevent that. How do I check if Adobe was used to ...
0
votes
1answer
166 views

Digital signing with qdigidoc4 (Estonian ID card software) under Ubuntu 20.04

When trying to use qdigidoc4 (version 4.2.4.71) on Ubuntu 20.04, and trying to sign a container, signing fails (both with ID card and Mobile ID) and I get the following message: ASiC_E.cpp:347 Failed ...
1
vote
2answers
614 views

How to handle “invalid signature” in apt-get

Following an update to Focal, I had to revisit /etc/apt/sources* to update my third party repositories. One of the reposities is for the Yorba PPA at: https://launchpad.net/~yorba/+archive/ubuntu/ppa ...
0
votes
0answers
119 views

Ubuntu 18: pcsc_scan hangs with alphanumeric PIN protected PKI smart card

I have a Dell Keyboard with smart card reader. Under MS-Windows it works like a charm: I can sign the documents - LibreOffice asks me for a certificate, I enter my alphanumeric PIN and voilà, the ODT ...
0
votes
0answers
187 views

Error gpg verify

I need to download tor, done it but cant verify sig. i've done gpg --auto-key-locate nodefault,wkd --locate-keys torbrowser@torproject.org gpg --output ./tor.keyring --export ...
1
vote
2answers
512 views

How do i generate a certificate to sign pdf electronically?

I'm stuck trying to figure out what kind of certificate I need to create, and how to create it to sign PDF's with LibreOffice. I created a GnuPG key, that did not work. I tried to create a private key ...
0
votes
2answers
222 views

Signature verification fails for program that I thought I removed. How to remove the program completely?

Here is the output that I get 53 packages can be upgraded. Run 'apt list --upgradable' to see them. W: An error occurred during the signature verification. The repository is not updated and the ...
1
vote
1answer
51 views

How to sign snaps without pushing or pushing it to snap store?

I am creating a snap for my software but until now I've been using --devmode or --dangerous flag to snap install. Now, I would like to sign it, but I can't find something like step-by-step or tutorial ...
0
votes
1answer
254 views

sbsign: sign a non EFI kernel

The following link explains how to sign a kernel module: https://ubuntu.com/blog/how-to-sign-things-for-secure-boot sbsign --key MOK.priv --cert MOK.pem my_binary.efi --output my_binary.efi.signed ...
8
votes
0answers
5k views

What exactly is an ext4 signature and why am I removing it?

I was following the steps from an Ask Ubuntu answer (Increase partition size on which Ubuntu is installed?) to enlarge an Ubuntu VM I have and I'm wondering what is actually being removed here: ...
6
votes
1answer
318 views

How to digitally sign documents in OpenOffice under Ubuntu?

On Ubuntu 19.04, Libreoffice seems to be there, but when I clicked, all the apps seem to be missing (like the word processor and the spreadsheet). So I first installed OpenOffice. Then I figured out ...
0
votes
0answers
75 views

Unable to mount External HDD missing NTFS and UUID

I need some help! The facts: I was trying to mount a microSD card while my external HDD (Samsung M3 Portable) was plugged and sth went wrong after these mistakes at command line: sudo wipefs --all -...
1
vote
0answers
52 views

How to specify which public key file to use with a repository?

I am trying to set up a repo on local file system on ubuntu. I will use that repo only during the installation of my product & then remove the repo. Now I want to have my deb packages signed &...
5
votes
1answer
1k views

Dell Canonical repository is not signed (GPG error)

With the update to 19.04 my dell repository is not working as it is marked as not signed. This is the error I get: Ign:11 http://dell.archive.canonical.com/updates xenial-dell Release.gpg W: GPG ...
1
vote
0answers
43 views

How to enlist all invalid signatures?

My machine keeps prompting of "Invalid Signatures Found" at every single boot. I knew of two kernel modules that had invalid signatures, the NVIDIA display driver module and the vboxdrv module, and I ...
2
votes
0answers
1k views

PKCS#7 signature not signed with a trusted key

Hi i just installed ubuntu 18.10 first boot worked fine but after I reboot black screen with this message keep comming up PKCS#7 signature not signed with a trusted key I have no idea what this ...
1
vote
0answers
470 views

PGP signature isn't selected when trying to sign during export of PDF-file in LibreOffice Writer

I have asked the following question on https://ask.libreoffice.org/en/question/183723/signature-isnt-selected-when-trying-to-sign-during-export-of-pdf-file-in-writer/ but nobody answered: I have an ...
2
votes
2answers
8k views

Boot Message: pkcs #7 signature not signed with a trusted key

It seems that this bug is an old one, and a really persistent one, as has been reported by several users. It was also reported that the bug has been resolved in patch updates, but, somehow, I am still ...
3
votes
1answer
604 views

LibreOffice fails to access my personal certificate

Recently, I updated my personal certificate. Then I wanted to sign a libreoffice document. I followed the instructions from Part 1 to Part 4. Both Thunderbird and Firefox are displaying the correct, ...
0
votes
1answer
998 views

Does DPKG support for verifying GPG signature for Debian package files?

I am trying to enable the GPG verification in /etc/dpkg/dpkg.cfg by remove no-debsig in this configuration file: .# Do not enable debsig-verify by default; since the distribution is not using ...
5
votes
1answer
391 views

openprinting key for ubuntu 18

I'm trying to add openprinting repo (http://www.openprinting.org/download/printdriver/debian lsb3.2) to my computer for some reason the key I downloaded (Release.gpg) is not working. I keep getting ...
1
vote
1answer
2k views

How to get pgp's scdaemon on ubuntu 18.04?

How to get pgp's scdaemon on ubuntu 18.04? It seems that for older versions it is present, but how should I install for newer ones? PS: I'm trying to use gpg --edit-card
2
votes
1answer
3k views

Ubuntu 18.04 - after upgrade - Display/PKCS#7 signature error

After upgrading from 17.10 to 18.04, anytime I try and open Ubuntu I am getting the following errors (which are found in my kern.log as well) Sep 28 15:06:12 aram-UX330UAK kernel: [ 15.056052] PKCS#...
0
votes
1answer
428 views

Unsigned repositories after running apt-get update (16.04)

Running apt-get update today refuses to update repositories as it doesn't think they are signed. At first it just gave the At least one invalid signature was encountered error for all repositories, ...
2
votes
1answer
138 views

When I verify a signed document with gpg, how does it know what public key to use?

When I sign a document, I can select the secret key to use e.g. like this: gpg --default-key=BF8C1203 --clearsign message.txt When I verify a document, I do not see this option, I can just do: gpg -...
0
votes
0answers
124 views

Digital signature and verification when the keys are in text files

I generated a key-pair using ssh-keygen. They are in two text files, say "abc.txt" and "abc.txt.pub". Now, I want to use the private key to sign a document. I did not find a way to do it with ssh, ...
0
votes
0answers
335 views

snort threshold.conf

I have suppressed a certain signature in etc/snort/threshold.conf, but after I saved and came out from threshold.conf file, I am still seeing those alerts in log file, here my question is do I need to ...
1
vote
1answer
2k views

Geary signature image

I found the signature option for Geary and I tried making a signature with an image. Referring to a file on my pc doens't work. When i paste the data-url from the image in the src box, it shows the ...
1
vote
0answers
33 views

failed to verify iso image: gpg can't check signature [duplicate]

I was trying to verify the iso image after dowloading the Discreete Linux. I carefully followed the instructions from Discreete website: https://www.discreete-linux.org/howto.html#use_pre That means ...
0
votes
2answers
5k views

Tor Browser Launcher does not download Tor Browser

I have installed Tor Browser Launcher: sudo apt-get install torbrowser-launcher but when I try to run Tor Browser the download always fail: Note: other downloads finish properly and I can correctly ...
3
votes
0answers
984 views

Why do I receive 'file open error' message?

I am trying to download swift 3.1.1 using ubuntu16.04 using the tutorial found at this link: https://swift.org/download/#using-downloads However, when I try to verify the signature file (step 4), I ...
0
votes
0answers
110 views

Tor Browser installation failed [duplicate]

I just downloaded tor browser; distro version - Ubuntu 16.04LTS. After installing tor I get: SIGNATURE VERIFICATION FAILED (RETRY failed). Is there a way to install it?
6
votes
1answer
2k views

How does Secure Boot actually work?

I'm playing with GRUB2, SecureBoot and Kernel Signing and I think I found a possible bug in my Secure Boot, but I want to check my understanding of these processes first. I know that when Secure Boot ...
2
votes
0answers
56 views

How to stay safe when adding new apt keys? [closed]

I'm a new user to Linux. I want to know how to stay safe when adding and installing new software by adding apt keys to repository then running sudo apt-get update, sudo apt-get install name. On ...