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Francisco Penedo Alvarez 7eeac6c3fc docs: create keys

2023-11-07 23:55:40 +01:00

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title	description	published	date	tags	editor	dateCreated
Keys		true	2023-11-07T22:55:37.899Z		markdown	2023-11-07T22:55:37.899Z

SSH

Keygen

ssh-keygen -t rsa -b 4096 -C "fran@franpenedo.com"
ssh-keygen -t ed25519 -C "fran@franpenedo.com" -f ~/.ssh/key

Authorized keys

Restrict key to execute a command with agent forwarding:

command="echo foo",restrict,agent-forwarding ssh-rsa AAABBBCCC...

Agent forwarding

Spawn a new empty ssh-agent inside a subshell, then populate it with needed keys.

     (
         eval $(ssh-agent) >/dev/null
         ssh-add ~/.ssh/key
         # -A for agent forwarding
         ssh -A user@host "command"
         kill ${SSH_AGENT_PID}
     )

GPG

Keys

List keys:

gpg --list-secret-keys --keyid-format LONG

[E]: encrypting key
[S]: signing key

Export subkeys:

gpg --armor --export-secret-subkeys fran@franpenedo.com | gpg --armor --symmetric --output mykey.sec.asc

DNIe

Arch linux

Install libpkcs11-dnie and dnieremote-bin from AUR. Possibly ca-certificates-{fnmt,dnie} needed.

Firefox

Load security device /usr/lib/libdnieremotepkcs11.so. Might need to restart.

Android

Install Lector de DNIe para PC, usando el movil from CNP-FNMT.

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SSH