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#!/bin/bash
# SPDX-License-Identifier: GPL-3.0-or-later
# This script manages the SSH agent, allowing you to start, stop, and reload it.
# Require script: core/lamguages.sh
# Usage:
# sagent_start - Start the SSH agent and add a private key.
# sagent_stop - Stop the SSH agent.
# sagent_reload - Reload the SSH agent and list added keys.
function sshagent_start {
local ssh_dir="$HOME/.ssh"
local default_lifetime="5d"
local key_path=""
local lifetime="$default_lifetime"
local seconds=0
local human_lifetime=""
msg "Buscando claves privadas en $ssh_dir..." "Looking for private keys in $ssh_dir..."
mapfile -t keys < <(find "$ssh_dir" -type f -not -name "*.pub" -exec grep -l "PRIVATE KEY" {} \;)
local key_count=${#keys[@]}
if [ "$key_count" -eq 0 ]; then
msg_err "No se encontraron claves privadas en $ssh_dir" "No private keys found in $ssh_dir"
return 1
elif [ "$key_count" -eq 1 ]; then
key_path="${keys[0]}"
msg "Una sola clave encontrada: $key_path" "Single key found: $key_path"
else
msg "Selecciona la clave que deseas agregar al agente SSH:" "Select the key you want to add to the SSH agent:"
select key in "${keys[@]}" "$(msg 'Cancelar' 'Cancel')"; do
if [[ "$REPLY" =~ ^[0-9]+$ ]]; then
if (( REPLY >= 1 && REPLY <= key_count )); then
key_path="$key"
break
elif (( REPLY == key_count + 1 )); then
msg "Operación cancelada." "Operation cancelled."
return 0
else
msg "Opción fuera de rango." "Option out of range."
fi
else
msg "Entrada no válida. Solo números." "Invalid input. Numbers only."
fi
done
fi
read -rp "$(msg "¿Tiempo de vida del agente? (Ej: 5m, 2h, 1d) [${default_lifetime}]: " \
"Agent lifetime? (e.g., 5m, 2h, 1d) [${default_lifetime}]: ")" user_input
lifetime="${user_input:-$default_lifetime}"
local num=${lifetime//[!0-9]/}
local unit=${lifetime//[0-9]/}
case "$unit" in
s|"") seconds=$num; human_lifetime="$(msg "$num segundo(s)" "$num second(s)")" ;;
m) seconds=$((num * 60)); human_lifetime="$(msg "$num minuto(s)" "$num minute(s)")" ;;
h) seconds=$((num * 3600)); human_lifetime="$(msg "$num hora(s)" "$num hour(s)")" ;;
d) seconds=$((num * 86400)); human_lifetime="$(msg "$num día(s)" "$num day(s)")" ;;
*) msg_err "Unidad de tiempo inválida. Usa s, m, h o d." "Invalid time unit. Use s, m, h or d."; return 1 ;;
esac
rm -rf /tmp/ssh-* > /dev/null
SSH_ENV="$HOME/.ssh/environment"
msg "Inicializando nuevo agente SSH..." "Initializing new SSH agent..."
ssh-agent | sed 's/^echo/#echo/' > "$SSH_ENV"
chmod 600 "$SSH_ENV"
# shellcheck source=/dev/null
source "$SSH_ENV" > /dev/null
if ssh-add -t "$seconds" "$key_path" >/dev/null 2>&1; then
msg "Clave agregada correctamente: $key_path (vida: $human_lifetime)" \
"Key added successfully: $key_path (lifetime: $human_lifetime)"
else
msg_err "Error al agregar la clave." "Failed to add SSH key."
fi
}
function sshagent_stop {
rm -rf /tmp/ssh-* > /dev/null
ssh-agent -k > /dev/null
msg "Agente SSH detenido." "SSH agent stopped."
}
function sshagent_findsockets {
find /tmp -uid "$(id -u)" -type s -name agent.\* 2>/dev/null
}
function sshagent_testsocket {
if ! command -v ssh-add >/dev/null; then
msg_err "ssh-add no está disponible. Cancelando prueba de socket." \
"ssh-add is not available. Cancelling socket test."
return 1
fi
[ -n "$1" ] && export SSH_AUTH_SOCK=$1
[ -z "$SSH_AUTH_SOCK" ] && return 2
if [ -S "$SSH_AUTH_SOCK" ]; then
ssh-add -l > /dev/null
case $? in
2)
msg "Socket $SSH_AUTH_SOCK no responde. Eliminando..." \
"Socket $SSH_AUTH_SOCK is unresponsive. Removing..."
rm -f "$SSH_AUTH_SOCK"
return 4
;;
0)
msg "Agente SSH encontrado en $SSH_AUTH_SOCK" \
"Found SSH agent at $SSH_AUTH_SOCK"
return 0
;;
esac
else
msg_err "$SSH_AUTH_SOCK no es un socket válido." "$SSH_AUTH_SOCK is not a valid socket."
return 3
fi
}
function sshagent_reload {
local AGENTFOUND=0
if sshagent_testsocket; then AGENTFOUND=1; fi
if [ $AGENTFOUND -eq 0 ]; then
for agentsocket in $(sshagent_findsockets); do
if sshagent_testsocket "$agentsocket"; then
AGENTFOUND=1
break
fi
done
fi
if [ $AGENTFOUND -eq 0 ]; then
eval "$(ssh-agent)"
fi
unset AGENTFOUND
unset agentsocket
ssh-add -l
}
if [[ -f "$HOME/.ssh/environment" ]]; then
sshagent_reload > /dev/null 2>&1
fi
alias sagent_start="sshagent_start"
alias sagent_stop="sshagent_stop"
unset -f sshagent_findsockets sshagent_testsocket
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