105 lines
3.3 KiB
Bash
105 lines
3.3 KiB
Bash
#!/usr/bin/env bash
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set -Eeuo pipefail
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SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
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CFG="$SCRIPT_DIR/config.sh"
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[[ -f "$CFG" ]] || { echo "ERROR: config.sh fehlt: $CFG (erst 01_setup.sh ausführen)"; exit 1; }
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# shellcheck disable=SC1090
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source "$CFG"
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# --- helpers ---
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APP="raspi-backup"
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STATE_DIR="${XDG_STATE_HOME:-$HOME/.local/state}/${APP}"
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LOG_FILE="${STATE_DIR}/${APP}.log"
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mkdir -p "$STATE_DIR"
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log(){ echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*" | tee -a "$LOG_FILE" >/dev/null; }
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die(){ log "ERROR: $*"; echo "ERROR: $*" >&2; exit 1; }
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need_cmd(){ command -v "$1" >/dev/null 2>&1 || die "Fehlt: $1"; }
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need_root(){ [[ "${EUID:-$(id -u)}" -eq 0 ]] || die "Bitte mit sudo starten: sudo $SCRIPT_DIR/02_setup_ssh.sh"; }
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host_short(){ hostname -s 2>/dev/null || hostname 2>/dev/null || echo "raspi"; }
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nas_alias(){ echo "${ALIAS_PREFIX}-$(host_short)"; }
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need_root
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need_cmd ssh
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need_cmd ssh-keygen
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# validate config vars
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: "${NAS_HOST:?}" "${NAS_USER:?}" "${NAS_PORT:?}" "${KEY_TYPE:?}" "${ALIAS_PREFIX:?}" "${SSH_USER:?}" "${NAS_AUTH_KEYS_FILE:?}"
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hn="$(host_short)"
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alias="$(nas_alias)"
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ssh_user="$SSH_USER"
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user_home="$(eval echo "~${ssh_user}")"
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[[ -d "$user_home" ]] || die "Home für SSH_USER '$ssh_user' nicht gefunden."
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ssh_dir="${user_home}/.ssh"
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key="${ssh_dir}/id_${KEY_TYPE}_${hn}"
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pub="${key}.pub"
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cfg="${ssh_dir}/config"
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log "SSH Setup START: ssh_user=${ssh_user} alias=${alias} nas=${NAS_USER}@${NAS_HOST}:${NAS_PORT} key=${key}"
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log "NAS_AUTH_KEYS_FILE: ${NAS_AUTH_KEYS_FILE}"
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# .ssh anlegen
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sudo -u "$ssh_user" mkdir -p "$ssh_dir"
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sudo -u "$ssh_user" chmod 700 "$ssh_dir"
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sudo -u "$ssh_user" touch "$cfg"
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sudo -u "$ssh_user" chmod 600 "$cfg"
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# Key anlegen falls fehlt
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if [[ ! -f "$key" ]]; then
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log "Erzeuge Key: $key"
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sudo -u "$ssh_user" ssh-keygen -t "$KEY_TYPE" -a 64 -f "$key" -N "" -C "${ssh_user}@${hn}"
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else
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log "Key existiert: $key"
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fi
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# Alias Block append-only
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if ! sudo -u "$ssh_user" grep -qE "^Host[[:space:]]+${alias}$" "$cfg"; then
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log "Füge Alias Block hinzu: $alias"
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sudo -u "$ssh_user" tee -a "$cfg" >/dev/null <<EOF
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Host ${alias}
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HostName ${NAS_HOST}
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User ${NAS_USER}
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Port ${NAS_PORT}
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IdentityFile ${key}
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IdentitiesOnly yes
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ServerAliveInterval 30
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ServerAliveCountMax 3
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EOF
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else
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log "Alias existiert schon: $alias"
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fi
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# Testconnect (accept-new nur beim Setup)
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log "SSH Verbindungstest (accept-new nur setup)..."
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sudo -u "$ssh_user" ssh -p "$NAS_PORT" -o StrictHostKeyChecking=accept-new -o ConnectTimeout=10 \
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"${NAS_USER}@${NAS_HOST}" "echo ok" >/dev/null \
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|| die "SSH Verbindung fehlgeschlagen: ${NAS_HOST}:${NAS_PORT}"
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# Pubkey lesen
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[[ -f "$pub" ]] || die "Public key fehlt: $pub"
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pubkey="$(sudo -u "$ssh_user" cat "$pub")"
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# WICHTIG: Key in zentrale NAS-Datei schreiben (nicht ~/.ssh/authorized_keys)
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# - legt Verzeichnis an
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# - sorgt für Datei + Rechte
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# - fügt Key nur hinzu, wenn noch nicht vorhanden
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log "Installiere Public Key in zentrale Datei am NAS..."
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sudo -u "$ssh_user" ssh -p "$NAS_PORT" -o ConnectTimeout=10 \
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"${NAS_USER}@${NAS_HOST}" \
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"set -e;
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f='${NAS_AUTH_KEYS_FILE}';
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d=\$(dirname \"\$f\");
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mkdir -p \"\$d\";
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touch \"\$f\";
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chmod 600 \"\$f\";
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grep -qxF '$pubkey' \"\$f\" || echo '$pubkey' >> \"\$f\""
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log "SSH Setup OK."
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echo "SSH Setup OK."
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echo "Test:"
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echo " sudo -u ${ssh_user} ssh ${alias} 'echo hello'"
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