29

At the moment, I'm trying to check the fingerprint of the oracle_vbox.asc key that I downloaded from http://www.virtualbox.org/wiki/Linux_Downloads: they provide the key and the fingerprint but no instructions for reviewing this information myself.

How do I show the fingerprint of the key I just downloaded?

apt-key finger oracle_vbox.asc shows the fingerprints of all trusted keys, which isn't what I want.

Braiam
  • 69,112
Amanda
  • 9,723

5 Answers5

31

Get the key:

$ wget http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc

Print the key fingerprint with GPG version 1:

$ gpg --with-fingerprint oracle_vbox.asc 
pub  1024D/98AB5139 2010-05-18 Oracle Corporation
                      (VirtualBox archive signing key) <info@virtualbox.org>
      Key fingerprint = 7B0F AB3A 13B9 0743 5925  D9C9 5442 2A4B 98AB 5139
sub  2048g/281DDC4B 2010-05-18
      Key fingerprint = 27B0 97CF 8257 4209 C434  8D42 B674 8A65 281D DC4B

Note that the 2nd fingeprint is just the fingerprint of the sub-key.

Print the fingerprint with GPG version 2:

$ gpg2 -n -q --import --import-options import-show  oracle_vbox.asc   
pub   dsa1024 2010-05-18 [SC]
      7B0FAB3A13B907435925D9C954422A4B98AB5139
uid   Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>
sub   elg2048 2010-05-18 [E]

Note that -n is an alias for --dry-run, i.e. the key isn't actually imported.

Alternatively, to just display the fingerprints:

$ gpg2 -nq --import --import-options import-show --with-colons oracle_vbox.asc \
     | awk -F: '$1 == "fpr" { print $10 }'
7B0FAB3A13B907435925D9C954422A4B98AB5139
27B097CF82574209C4348D42B6748A65281DDC4B
maxschlepzig
  • 3,734
9

Step 1

$ deb http://download.virtualbox.org/virtualbox/debian artful contrib

Step 2

$ wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -

Step 3

$ apt-key list

or, equivalently,

$ apt-key finger

which should return

/etc/apt/trusted.gpg
--------------------
pub   rsa4096 2016-04-22 [SC]
      B9F8 D658 297A F3EF C18D  5CDF A2F6 83C5 2980 AECF
uid           [ unknown] Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>
sub   rsa4096 2016-04-22 [E]

which in turn should be equivalent to

The key fingerprint for oracle_vbox_2016.asc is

B9F8 D658 297A F3EF C18D  5CDF A2F6 83C5 2980 AECF
Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>

on https://www.virtualbox.org/wiki/Linux_Downloads, either by visual inspection or further command line fu.

Related links:

nutty about natty
  • 6,978
2

Using gpg version 2.2.27

gpg --version

output


gpg (GnuPG) 2.2.27
libgcrypt 1.9.4

Download the current .asc file from https://www.virtualbox.org/wiki/Linux_Downloads as of this writing (2023-03-22):

wget https://www.virtualbox.org/download/oracle_vbox_2016.asc

The VirtualBox website currently states:

The key fingerprint for oracle_vbox_2016.asc is

B9F8 D658 297A F3EF C18D  5CDF A2F6 83C5 2980 AECF
Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>

The following commands all allow to verify this information, each with different formatting:

gpg --show-keys --with-fingerprint --keyid-format=short oracle_vbox_2016.asc

Output:

pub   rsa4096/2980AECF 2016-04-22 [SC]
      Key fingerprint = B9F8 D658 297A F3EF C18D  5CDF A2F6 83C5 2980 AECF
uid                    Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>
sub   rsa4096/920E471F 2016-04-22 [E]

gpg --show-keys --with-fingerprint oracle_vbox_2016.asc

Output:

pub   rsa4096 2016-04-22 [SC]
      B9F8 D658 297A F3EF C18D  5CDF A2F6 83C5 2980 AECF
uid                      Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>
sub   rsa4096 2016-04-22 [E]

gpg --show-keys oracle_vbox_2016.asc

Output:

pub   rsa4096 2016-04-22 [SC]
      B9F8D658297AF3EFC18D5CDFA2F683C52980AECF
uid                      Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>
sub   rsa4096 2016-04-22 [E]

gpg --show-keys --with-colons oracle_vbox_2016.asc

Output ("The --with-colons option emits the output in a stable, machine-parseable format, which is intended for use by scripts and other programs."):

pub:-:4096:1:A2F683C52980AECF:1461318881:::-:::scESC::::::23::0:
fpr:::::::::B9F8D658297AF3EFC18D5CDFA2F683C52980AECF:
uid:-::::1461318881::CA5D570DDFDB695A0301885765DD8E285368742C::Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>::::::::::0:
sub:-:4096:1:AD18C79D920E471F:1461318881::::::e::::::23:
fpr:::::::::31DD01EB8C64DF3D12E7BC97AD18C79D920E471F:
Abdull
  • 734
1

This works with GPG 2 (at least I could check it with versions 2.1.18 and 2.2.12):

wget http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc
gpg_home=$(mktemp -d)
gpg --homedir "$gpg_home" --import oracle_vbox.asc
# gpg: keybox '/tmp/tmp.CHoWuJBy7N/pubring.kbx' created
# gpg: /tmp/tmp.CHoWuJBy7N/trustdb.gpg: trustdb created
# gpg: key 54422A4B98AB5139: public key "Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>" imported
# gpg: Total number processed: 1
# gpg:               imported: 1
gpg --homedir "$gpg_home" --list-keys
# /tmp/tmp.CHoWuJBy7N/pubring.kbx
# -------------------------------
# pub   dsa1024 2010-05-18 [SC]
#       7B0FAB3A13B907435925D9C954422A4B98AB5139
# uid           [ unknown] Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>
# sub   elg2048 2010-05-18 [E]
#

Source: https://unix.stackexchange.com/a/468889

ominug
  • 191
0

You have both the key and the fingerprint? Run:

ssh-keygen -lf key.pub

against the key to get the fingerprint.

ssh-keygen reference: http://www.manpagez.com/man/1/ssh-keygen/

Eric Carvalho
  • 55,453
mvario
  • 750