Questions tagged [signature]
Use for questions related to digital signatures
73
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error: msys: signature from "XXX" is invalid
How can I fix the error in the terminal on Arch Linux below?
error: msys: signature from "David Macek <[email protected]>" is invalid
This happen when I execute command.
sudo ...
- 1
0
votes
0
answers
117
views
Signing Nvidia drivers for Secure Boot - Nvidia module location
I want to sign my nvidia driver so I can use it with Secure Boot.
I'm trying to follow these instructions for nvidia driver:
https://wiki.debian.org/SecureBoot#Using_your_key_to_sign_modules_....
- 33
2
votes
1
answer
81
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Convert encrypted and signed to just signed PGP message
Suppose Bob got a message from Alice encrypted with his public key and signed with her private key. Now he wants to prove to Charlie that he got a message from her with this exact content. The message ...
- 23
2
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0
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15
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System update supporting IMA signatures
I'm trying to harden a Linux system by using IMA and want to apply digital signatures to binaries. I'm wondering if there is a package manager supporting the IMA signatures so that the binaries can be ...
- 131
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14
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Get older revision of signed pdf in command line
I'm creating a multiple signed PDF with JSignPDF. I have an empty PDF file that I sign multiple times. Here is the minimum reproducible example of how I make the PDFs:
$ echo '...
- 239
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0
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53
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How to add a signing key for modules in OpenSUSE Leap 15?
Well, I thought I could use openSUSE Leap 15.5 "out of the box" (in my case: after upgrading from 15.4), but I have the problem that a kernel module (WLAN driver) is not accepted by the ...
- 1,210
0
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0
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25
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Chroot jail set up with debootstrap cannot verify package signatures
I set up a chroot jail with
sudo debootstrap --variant=buildd --include=fakeroot,build-essential,ca-certificates,debian-archive-keyring,git,sudo --arch=$CROSS_ARCH --foreign $CROSS_RELEASE $CROSS_ROOT ...
- 1,125
2
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1
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266
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Is it possible to append a signature to a squashfs file, without causing problems with tools/mount?
I would like to authenticate a squashfs image, using a public-key signature. For an elegant implementation, it would be ideal if such a signature could simply be appended to the end of the squashfs ...
- 799
0
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0
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109
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Microsoft public repository rpm downloads failed with gpgcheck enabled with reposync
I’m facing an issue to download the patches (rpm) from Microsoft public repository site with gpgcheck=1.
Repository site: https://packages.microsoft.com/rhel/7/prod/
To download all rpm I have ...
1
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0
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126
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How to view information about TSA from signed pdf?
How to get information about TSA (Time Stamping Authority) if it was used for a timestamp when signing a PDF document, e.g. with LibreOffice Draw?
LibreOffice Draw only displays the time, it is not ...
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4
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1
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7k
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How do I check or verify a pgp/gpg signature using a .asc PGP signature file? (Can't check signature: No public key)
I'm installing the Ultimaker Cura 3D printer slicer program from here (https://github.com/Ultimaker/Cura/releases/tag/5.1.0) onto Linux Ubuntu 20.04.
I downloaded these 2 files:
Ultimaker-Cura-5.1.0-...
- 2,302
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votes
2
answers
92
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How to properly setup a verified mail signature?
I've renewed and imported my old self-generated GPG certificate. After setting the new expiration date I've uploaded my cert using gpg --keyserver pgp.mit.edu --send-keys <key id>
Receiving a ...
- 321
1
vote
1
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415
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How do I view information contained in a file produced by `pdfsig -dump`?
pdfsig shows some information about digital signature of a PDF document, and also allows to -dump it to file. How do I view all information from that file in accessible form? It contains much more ...
- 5,568
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278
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Request for help repairing output of apt update
This is the output of sudo apt update
I would appreciate it if someone could help me fix the problems, I'm only new to Linux.
I'm running (Linux kali 5.16.0-kali5-amd64 #1 SMP PREEMPT Debian 5.16.14-...
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7
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3
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3k
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How to create a self-signed certificate for Okular PDF
I am at a loss. I want to create a self-signed certificate to sign PDFs with Okular. I have not found any step-by-step directions that work. I tried creating and installing a certificate, but Okular ...
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0
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68
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verify live image in dracut
I have enabled EFI on the target host, enabled secure boot with my own PlatformKey, enabled ipxe bootstrap image where imgverify is used for checking the signature of the initrd. Now I have the ...
- 11
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1
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475
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Arch linux: custom repo: File is corrupted (invalid or corrupted package (checksum))
I created a custom repository on my manjaro machine (to make a custom Manjaro ISO) with adding:
[manjaro-mate-aur-packages]
SigLevel = Never
Server = https://github.com/FreaxMATE/manjaro-mate-aur-...
- 71
1
vote
1
answer
287
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GPG : no more signatures of a fresh imported key
SHORT
GPG doesn't get signatures of an imported public key anymore (with Ubuntu 20.04) while it did it 6 months ago (with Ubuntu 18.04).
I don't understand what's wrong.
LONG
On march, I followed this ...
2
votes
1
answer
517
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GPG drops all non-self-signatures
I want to import/refresh a gpg key from a keyserver including all non self-signatures.
Whenever I try to do this gpg says, for example
gpg: key <number>: number of dropped non-self-signatures: ...
- 101
2
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3
answers
5k
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Installing Sublime Text with apt fails due to missing public key
I am using the instructions linked below to setup apt to install sublime-text.
I am intentionally applying the method for connecting to third party repositories described on the Debian and ...
- 232
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1
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8k
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Invalid signature for Kali Linux: The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository
I tried to do sudo apt update && sudo apt upgrade on the WSL Kali linux. But I would get this.
sudo apt update
Get:1 http://wlglam.fsmg.org.nz/kali kali-rolling InRelease [30.5 kB]
Err:1 http:/...
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3
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2
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3k
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What is the difference between a GPG signature and a detached signature?
We can sign a file with gpgp:
gpg -s file.pdf
Which generates a file signature file.pdf.gpg.
It is also possible to make a detached signature:
gpg -b file.pdf
Which generates file.pdf.sig.
I noticed ...
user462354
6
votes
2
answers
6k
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How can I check if there is a signature associated with a deb package?
In rpm-based systems, we can easily see if there is a signature associated with an rpm file:
rpm -qpi <rpm-file.rpm> | grep -i signature
For .deb files, we can see the package information but ...
2
votes
2
answers
1k
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Custom signed Centos 7 PXE Secureboot with Shim and grub: invalid kernel signature
As the title suggests, I'm trying to set up a system that uses PXE boot to boot into CentOS7 with custom signing keys. This process is adapted from several guides but the gist of it is that I use grub ...
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1
vote
0
answers
377
views
Parabola GNU/Linux-libre installation: problem with key
I'm trying to install Parabola GNU/Linux-libre (OpenRC) and I repeatedly get this error during pacstrap /mnt base elogind udev-init-scripts.
error: some-package: signature from "A Packager <a-...
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1
vote
1
answer
284
views
Remove -- from signature in neomutt
The content of my signature file is
John Doe
but neomutt appends it to mails as
--
John Doe
How can I get rid of the --?
- 146
4
votes
1
answer
400
views
Black screen in Guix System installation
I have this problem to install Guix System:
After this, the screen turns black and nothing is displayed.
I first downloaded the Guix System, extracted the iso with this command: "unxz" and ...
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3
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1
answer
2k
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BAD signature when installing specific package with apk after forced poweroff
Earlier I was playing around with my PinePhone running postmarketOS Edge (based on Alpine Linux Edge) and while installing gcc-go using apk via the command sudo apk add gcc-go the phone froze. As such,...
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1
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1k
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Trouble verifying linux, even after downloading key I get "No public key"
Following these instructions, I downloaded and unpacked the kernel.
https://priyachalakkal.wordpress.com/2013/01/19/verifying-digital-signature-using-gpg/
Then I tried to verify the signature but I ...
- 169
1
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1
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3k
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Correct way to verify PGP signature in BASH script (pinning exact long fingerprint)
I have:
A file
A detached PGP signature of that file in ASCII armor format and
A 40-character (long-format) fingerprint identifying the one key that must have a valid signature
What is the correct ...
- 172
1
vote
1
answer
1k
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Verifying Signature of Debian 10.5 returns error "Can't check signature: No public key"
I'm trying to verify the SHA512 checksum for Debian 10.5-amd-netinst.iso as found on the official Debian CD-image site.
I'm running into the following error:
gpg --no-default-keyring --keyring Debian\ ...
- 13
5
votes
1
answer
3k
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Looking for a way to sign PDFs
I am looking for a working method to sign PDFs using the certificate
from a signature card.
So what I need is either a program that signs PDFs in a way that is compatible
to what AcroRead does on ...
- 18.9k
1
vote
1
answer
1k
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rpm --addsign complains about "no secret key"
Running this command I get an error.
$ rpm --addsign ./kalzium-libs-19.12.3-1.fc33.i686.rpm
Enter pass phrase:
gpg: skipped "Evan Carroll": No secret key
gpg: signing failed: No secret key
Pass ...
- 29.6k
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0
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314
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What does the "Certificates" section in seahorse do?
What does the "Certificates" / "System Trust" section of seahorse do?
I am trying to sign a document in LibreOffice and the menu there uses the word "Certificate", so I am thinking that I need to ...
- 925
2
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1
answer
3k
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Verify installed rpm packages signatures
I'm interested in checking the integrity of all installed rpm packages on the system.
In case I have the rpm file itself, I'll run rpm -Kv PACKAGE.rpm, but what can I achieve the same goal if I the ...
0
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1
answer
112
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How do I know an open-sourced app is running the open source code it claims to be running? [duplicate]
You can argue that you can check the checksum of the application's package, but you are then trusting the developer to have compiled the right code and provided the right signature.
Is there a way to ...
- 101
5
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1
answer
13k
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Partition #3 contains a ext4 signature
When i use fdisk to create a new partition i get an error which says
Partition #3 contains a ext4 signature
Do you want to remove the signature? [Y]es/[N]o:
This error is not a problem but i am ...
- 967
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0
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6k
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"Required key not available" error when trying to load signed module
I made a module and compiled it with make modules_install.
I ran these commands following this gist:
openssl req -new -x509 -newkey rsa:2048 -keyout MOK.priv -outform DER -out MOK.der -nodes -subj "...
- 101
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1
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4k
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Automatic module signing for distribution in Linux
I'm new to writing Linux modules (drivers) and digital signatures, so please correct me if any of my understanding is incorrect.
When I run make modules_install on my module, I get the following ...
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10
votes
1
answer
14k
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How to verify a kernel module signature?
When you compile a kernel source, you can choose to sign kernel modules using the CONFIG_MODULE_SIG* options. The modinfo tool should handle the task of verifying the module signature, but there has ...
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1
answer
2k
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What happened to elfsign and elfverify?
In "Uninformed Research -- informative information for the uninformed." 2003 mentions a tool called elfsign and elfverify. This is a tool to checksum and sign an ELF binary.
I can't find that tool in ...
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14
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2
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44k
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What is a vfat signature?
Recently, I have noticed that I cannot access my USB flash drive filesystem (it was of FAT type, as far as I can remember). Fedora did not mount it automatically and lsblk could not see the partition. ...
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6
votes
1
answer
4k
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How to detach-sign a file with a specific private key? || Why this fails?
I have a .tar.xz file which I would like to detach-sign using my gpg private key.
The problem is, I have multiple of private keys imported to my keyring and need to choose, which one to use.
...
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1
vote
1
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3k
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dpkg-source: warning: failed to verify signature
System: Linux Mint 19 Cinnamon, based on Ubuntu 18.04.
In this answer, I am being pointed at a different solution, other than installing directly from source.
Since I haven't ever used dget, I must ...
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3
votes
2
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4k
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SUSE Linux Signature verification failed
When I code, build and sign .rpm file for SUSE Linux, it is signed successfully as follows:
rpm --checksig -v xxx.rpm
Header V4 RSA/SHA256 Signature, key ID 7936b039: OK
Header SHA1 digest: OK
...
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0
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2k
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How do I verify linux kernel signature with gpg?
Following the notes at the kernel.org site, but I cannot seem to verify the signature of the kernel. I tried to use the given script to handle it for me, but that has failed too.
user@localhost ~ $ ...
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2
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504
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How do I verify https://files.devuan.org/devuan-devs.gpg
I am running Devuan Jessie. I want to install another Devuan Ascii from scratch. So I downloaded:
https://files.devuan.org/devuan_ascii/installer-iso/devuan_ascii_2.0.0_amd64_netinst.iso
https://...
- 1,142
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2
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3k
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pacman -Syyu error: could not import key from Trusted User
DISTRIB_ID=ManjaroLinux
DISTRIB_RELEASE=17.1.6
DISTRIB_CODENAME=Hakoila
I installed manjaro on an old laptop today and am in the process of trying to update it.
just using pacman -Syyu eventually ...
- 111
2
votes
0
answers
525
views
How to know which module is not trusted?
I am running Kubuntu 18.04. Now I notice my kernel log several lines having PKCS#7 signature not signed with a trusted key.
Now I need to know which module (or whatever) causing this. Is there any way ...
- 253
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1
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132
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Evolution - imported signatures not used
Evolution 3.28.0-4 on Debian Testing.
I did a restore of my evolution-config, copied ~/.config/evolution from backup to my machine. The email-accounts and all the emails are fine.
For each account ...
