Cobra
77aac72d31
Copying authorized_keys verbatim onto a drop implant leaks internal hostnames,
usernames, and tool names in key comments. preconfig_sd.sh now strips all
comments (awk '{print $1,$2}') when writing keys to SD card. deploy.sh adds
the same strip step on the live device as a safety net.
90 lines
3.4 KiB
Bash
Executable File
90 lines
3.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Pre-configure an Armbian SD card before first boot.
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# Handles: WiFi, root password, SSH keys (comments stripped), hostname, wizard bypass.
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#
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# Usage: sudo bash scripts/preconfig_sd.sh SSID PASSPHRASE [MOUNT_POINT]
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# MOUNT_POINT defaults to /mnt/opi
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set -euo pipefail
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RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; NC='\033[0m'
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info() { echo -e "${GREEN}[+]${NC} $*"; }
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warn() { echo -e "${YELLOW}[!]${NC} $*"; }
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error() { echo -e "${RED}[-]${NC} $*"; exit 1; }
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[[ $EUID -eq 0 ]] || error "Must run as root (sudo)"
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SSID="${1:-}"
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PASSPHRASE="${2:-}"
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MOUNT="${3:-/mnt/opi}"
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[[ -z "$SSID" || -z "$PASSPHRASE" ]] && {
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echo "Usage: sudo $0 SSID PASSPHRASE [MOUNT_POINT]"
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exit 1
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}
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[[ -d "$MOUNT/etc" ]] || error "Mount point not valid: $MOUNT — is the SD card mounted?"
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# ── WiFi ──────────────────────────────────────────────────────────────────────
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NM_DIR="${MOUNT}/etc/NetworkManager/system-connections"
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NM_FILE="${NM_DIR}/wifi-bb.nmconnection"
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mkdir -p "$NM_DIR"
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cat > "$NM_FILE" << EOF
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[connection]
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id=wifi-bb
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type=wifi
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autoconnect=true
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[wifi]
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mode=infrastructure
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ssid=${SSID}
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[wifi-security]
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auth-alg=open
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key-mgmt=wpa-psk
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psk=${PASSPHRASE}
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[ipv4]
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method=auto
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[ipv6]
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method=disabled
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EOF
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chmod 600 "$NM_FILE"
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info "WiFi profile written (${SSID})"
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# ── Root password ─────────────────────────────────────────────────────────────
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read -s -r -p "New root password: " ROOT_PASS; echo
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read -s -r -p "Confirm: " ROOT_PASS2; echo
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[[ "$ROOT_PASS" == "$ROOT_PASS2" ]] || error "Passwords do not match"
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HASH=$(openssl passwd -6 "$ROOT_PASS")
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sed -i "s|^root:[^:]*:|root:${HASH}:|" "${MOUNT}/etc/shadow"
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info "Root password set"
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unset ROOT_PASS ROOT_PASS2
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# ── SSH authorized_keys (comments stripped) ───────────────────────────────────
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# Drop only the key material — no hostnames, usernames, or tool names in comments
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if [[ -f "${HOME}/.ssh/authorized_keys" ]]; then
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SSH_DIR="${MOUNT}/root/.ssh"
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mkdir -p "$SSH_DIR"
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# Strip comments: keep only type + base64 key, drop the comment field
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awk '{print $1, $2}' "${HOME}/.ssh/authorized_keys" > "${SSH_DIR}/authorized_keys"
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chmod 700 "$SSH_DIR"
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chmod 600 "${SSH_DIR}/authorized_keys"
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KEY_COUNT=$(wc -l < "${SSH_DIR}/authorized_keys")
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info "Wrote ${KEY_COUNT} SSH key(s) (comments stripped)"
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else
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warn "No authorized_keys found at ${HOME}/.ssh/authorized_keys — SSH key auth will not work"
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fi
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# ── Hostname ──────────────────────────────────────────────────────────────────
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echo "orangepi" > "${MOUNT}/etc/hostname"
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info "Hostname set to: orangepi"
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# ── Bypass first-login wizard ─────────────────────────────────────────────────
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rm -f "${MOUNT}/root/.not_logged_in_yet"
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info "First-login wizard disabled"
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echo ""
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info "SD card ready. Unmount, insert, and power on."
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info "Once booted: bash scripts/deploy.sh root@10.0.0.0 --enable-service"
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