Questions tagged [signature]
Use for questions related to digital signatures
81 questions
1 vote
0 answers
11 views
U-Boot signature verification using ECDSA fails
I'm trying to use ECDSA (prime256v1) for signature verification in U-Boot (git tag "v2025.10"). I used the sample configuration from Verified Boot on the Beaglebone Black as a template. ...
- 11
-3 votes
1 answer
22 views
How to fix the update and upgrade in ParrotOS
How do I fix this error? GPG error: https://deb.parrot.sh/parrot parrot InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7A8286AF0E81EE4A E: ...
7 votes
2 answers
856 views
apt seems to be ignoring Signed-By
I'm trying to install AviSynth+ from yuuki-deb.x86.men. $ cat /etc/apt/sources.list.d/yuuki-deb.sources Types: deb URIs: http://yuuki-deb.x86.men/ Suites: bullseye Components: main Signed-By: /usr/...
- 722
0 votes
0 answers
280 views
How do you generate a keyring file for a local APT repository?
Based on this answer, I followed this guide to create a local apt repository. Now I an specifying that debootstrap use my repository with file:path/to/my/apt/repo. When debootstrap runs, I get this: I:...
- 111
2 votes
1 answer
712 views
apt rejects sha1 and rsa1024 signatures after upgrade to version >= 2.9.19 - when GnuPG is replaced with Sequoia
After upgrading apt to version >= 2.9.19 SHA1 and RSA1024 signatures are rejected. There is a section in its changelog which says: apt (2.9.19) unstable; urgency=medium Replace GnuTLS and gcrypt ...
- 690
0 votes
1 answer
51 views
File signing with minimum hassle for the verifier
Suppose I want to publish (or send to someone) a file. I also want the recipients of it to be able to verify that any further updates to it come from the same source/author as the original. The ...
- 469
0 votes
0 answers
50 views
Solaris 10 elfsign: how to create a correct certificate to sign a binary?
On Solaris11 is possible to use certificates made with openssl, on Solaris 10 is different elfsign sign -c solaris10.crt -k solaris10.key -e libeel-2.so exit with error and state of exit is 4 (...
- 14.3k
1 vote
0 answers
119 views
How to verify vc_redist.x64.exe with osslsigncode?
osslsigncode verify VirtualBox-7.1.0-164728-Win.exe: Functional. osslsigncode verify vc_redist.x64.exe: Broken. Why? How to fix? Full logs below. Debian 12. Functional: osslsigncode verify VirtualBox-...
- 1,976
2 votes
1 answer
450 views
gpg: Can't check signature: No public key | Debian Raspberry Pi Images
I am having some issue verifying the Raspberry Pi image for the RPI 2B of Debian. Steps followed: Download Files: wget https://raspi.debian.net/tested/20231109_raspi_2_bookworm.img.xz && wget ...
0 votes
1 answer
733 views
"error: /boot/vmlinuz-6.6.9-amd64 has invalid signature" with secure boot on in Kali Linux
When I try to run my Kali Linux system with secure boot on, GRUB returns error: /boot/vmlinuz-6.6.9-amd64 has invalid signature. I don't want to turn off secure boot. I have followed the directions ...
- 764
0 votes
1 answer
525 views
apt-get update prevented by signature failure
I am trying to apt update on my WSL sudo apt-get update but getting this error. Err:6 https://linux.qmk.fm focal InRelease The following signatures couldn't be verified because the public key is not ...
- 3
0 votes
1 answer
74k views
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 ...
- 3
0 votes
1 answer
3k 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_....
- 133
2 votes
1 answer
303 views
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 votes
0 answers
72 views
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 ...
- 141