1376 lines
52 KiB
Bash
Executable File
1376 lines
52 KiB
Bash
Executable File
#!/usr/bin/env bash
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# `boot --server` is deliberately public and must be safe before it reaches the
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# cloned repository. Exercise its root branch through a PTY, against only a
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# temporary filesystem and PATH adapters.
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set -uo pipefail
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repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
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boot="$repo_dir/boot"
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[[ -x "$boot" ]] || {
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printf 'root server bootstrap: %s is not executable\n' "$boot" >&2
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exit 1
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}
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python3 - "$boot" <<'PY'
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import atexit
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import errno
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import fcntl
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import os
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import pty
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import re
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import select
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import signal
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import shutil
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import stat as stat_module
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import subprocess
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import sys
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import tempfile
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import termios
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import time
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from pathlib import Path
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boot = sys.argv[1]
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work = Path(tempfile.mkdtemp())
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atexit.register(shutil.rmtree, work, ignore_errors=True)
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findings: list[str] = []
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BOOT_REVISION = "0123456789abcdef0123456789abcdef01234567"
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BOOT_SHA256 = subprocess.run(
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["sha256sum", boot], check=True, capture_output=True, text=True
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).stdout.split()[0]
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def note(message: str) -> None:
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findings.append(message)
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def write_executable(path: Path, contents: str) -> None:
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path.write_text(contents)
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path.chmod(0o755)
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def generate_public_key(label: str) -> str:
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key_path = work / label
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subprocess.run(
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["ssh-keygen", "-q", "-t", "ed25519", "-N", "", "-C", label, "-f", key_path],
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check=True,
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)
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public_key = key_path.with_suffix(".pub").read_text()
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key_path.unlink()
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key_path.with_suffix(".pub").unlink()
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return public_key
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TARGET_PUBLIC_KEY = generate_public_key("panama-target-fixture")
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ROOT_PUBLIC_KEY = generate_public_key("panama-root-fixture")
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def make_stubs(stub_dir: Path, fixture_root: Path, calls: Path) -> None:
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common = f'''#!/usr/bin/env bash
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set -u
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calls={str(calls)!r}
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log() {{
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local argument
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{{ for argument in "$@"; do printf '%q ' "$argument"; done; printf '\\n'; }} >>"$calls"
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}}
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consume_result() {{
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local name="$1" results result
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results="$PANAMA_BOOT_FIXTURE_ROOT/state/$name"
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if ! IFS= read -r result <"$results"; then
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return 0
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fi
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/usr/bin/tail -n +2 "$results" >"$results.next"
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/usr/bin/mv -f -- "$results.next" "$results"
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[[ "$result" =~ ^[0-9]+$ ]] || exit 97
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return "$result"
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}}
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'''
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write_executable(stub_dir / "id", common + r'''
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log id "$@"
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case "${1:-}" in
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-u)
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case "${2:-}" in
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'') printf '0\n' ;;
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root) printf '0\n' ;;
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gib) cat "$PANAMA_BOOT_FIXTURE_ROOT/state/target-uid" ;;
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*) exit 97 ;;
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esac
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;;
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-nG) [[ "${2:-}" == gib ]] || exit 97; printf 'operators wheel\n' ;;
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*) exit 97 ;;
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esac
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''')
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write_executable(stub_dir / "passwd", common + r'''
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log passwd "$@"
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[[ "${1:-}" == -S && "${2:-}" == gib ]] || exit 97
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printf 'gib PS\n'
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''')
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write_executable(stub_dir / "getent", common + r'''
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log getent "$@"
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[[ "${1:-}" == passwd && "${2:-}" == gib ]] || exit 97
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home="$(<"$PANAMA_BOOT_FIXTURE_ROOT/state/home")"
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printf 'gib:x:1000:2000::%s:/bin/bash\n' "$home"
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''')
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write_executable(stub_dir / "stat", common + r'''
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log stat "$@"
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[[ "${1:-}" == -Lc && "${2:-}" == '%u:%a' ]] || exit 97
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case "${3:-}" in
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"$PANAMA_BOOT_FIXTURE_ROOT/home/gib/.ssh") cat "$PANAMA_BOOT_FIXTURE_ROOT/state/target-dir-meta" ;;
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"$PANAMA_BOOT_FIXTURE_ROOT/home/gib/.ssh/authorized_keys") cat "$PANAMA_BOOT_FIXTURE_ROOT/state/target-key-meta" ;;
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"$PANAMA_BOOT_FIXTURE_ROOT/root/.ssh/authorized_keys") cat "$PANAMA_BOOT_FIXTURE_ROOT/state/root-key-meta" ;;
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*) exit 97 ;;
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esac
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''')
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write_executable(stub_dir / "runuser", common + r'''
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log runuser "$@"
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[[ "${1:-}" == -u && "${2:-}" == gib && "${3:-}" == -- ]] || exit 97
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shift 3
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if [[ "${1:-}" == install && "${2:-}" == -d && "${3:-}" == -m && "${4:-}" == 0700 && "${5:-}" == -- ]]; then
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/usr/bin/install "${@:2}"
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printf '%s:700\n' "$(<"$PANAMA_BOOT_FIXTURE_ROOT/state/target-uid")" \
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>"$PANAMA_BOOT_FIXTURE_ROOT/state/target-dir-meta"
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exit 0
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fi
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if [[ "${1:-}" == install && "${2:-}" == -m && "${3:-}" == 0600 && "${4:-}" == -- ]]; then
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/usr/bin/install "${@:2}"
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printf '%s:600\n' "$(<"$PANAMA_BOOT_FIXTURE_ROOT/state/target-uid")" \
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>"$PANAMA_BOOT_FIXTURE_ROOT/state/target-key-meta"
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exit 0
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fi
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"$@"
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''')
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write_executable(stub_dir / "ssh-keygen", common + r'''
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log ssh-keygen "$@"
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exec /usr/bin/ssh-keygen "$@"
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''')
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write_executable(stub_dir / "git", common + r'''
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log git "$@"
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case "${1:-}" in
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init)
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[[ "$#" -eq 2 ]] || exit 97
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mkdir -p "$2/.git"
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;;
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-C)
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case "${3:-}" in
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remote)
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[[ "$#" -eq 6 && "$4" == add && "$5" == origin \
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&& "$6" == https://git.gbrown.org/gib/Panama.git ]] || exit 97
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;;
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fetch)
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[[ "$#" -eq 6 && "$4" == --depth=1 && "$5" == origin \
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&& "$6" == "$PANAMA_BOOT_REVISION" ]] || exit 97
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;;
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checkout)
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if [[ "${4:-}" == --detach ]]; then
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[[ "$#" -eq 5 && "$5" == "$PANAMA_BOOT_REVISION" ]] || exit 97
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cp "$PANAMA_BOOT_FIXTURE_ROOT/stub-install" "$2/install"
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chmod +x "$2/install"
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else
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[[ "$#" -eq 5 && "$4" == -b && "$5" == main ]] || exit 97
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fi
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;;
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rev-parse)
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[[ "$#" -eq 4 && "$4" == 'HEAD^{commit}' ]] || exit 97
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printf '%s\n' "$PANAMA_BOOT_REVISION"
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;;
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config)
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case "${4:-}:${5:-}:${6:-}" in
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branch.main.remote:origin:|branch.main.merge:refs/heads/main:) ;;
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*) exit 97 ;;
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esac
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;;
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*) exit 97 ;;
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esac
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;;
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*) exit 97 ;;
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esac
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''')
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write_executable(stub_dir / "dnf", common + r'''
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log dnf "$@"
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[[ "${1:-}" == install && "${2:-}" == -y && "${3:-}" == git ]] || exit 97
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''')
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write_executable(stub_dir / "sshd", common + r'''
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log sshd "$@"
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case "${1:-}" in
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-t)
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[[ "$#" -eq 1 ]] || exit 97
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for artifact in "$PANAMA_BOOT_FIXTURE_ROOT/etc/ssh/sshd_config.d"/.00-panama.*; do
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[[ -e "$artifact" ]] || continue
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log ssh-artifact "$artifact" "$(/usr/bin/stat -c %a -- "$artifact")"
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done
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consume_result SSHD_RESULTS
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;;
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-T)
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[[ "$#" -eq 3 && "$2" == -C ]] || exit 97
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case "$3" in
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user=root,host=localhost,addr=127.0.0.1)
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cat "$PANAMA_BOOT_FIXTURE_ROOT/state/ROOT_POLICY"
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;;
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user=gib,host=localhost,addr=127.0.0.1)
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cat "$PANAMA_BOOT_FIXTURE_ROOT/state/TARGET_POLICY"
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;;
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*) exit 97 ;;
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esac
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;;
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*) exit 97 ;;
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esac
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''')
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write_executable(stub_dir / "systemctl", common + r'''
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log systemctl "$@"
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case "${1:-}:${2:-}" in
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cat:sshd.service) [[ "$(<"$PANAMA_BOOT_FIXTURE_ROOT/state/SSHD_UNIT")" == present ]] ;;
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cat:ssh.service) [[ "$(<"$PANAMA_BOOT_FIXTURE_ROOT/state/SSH_UNIT")" == present ]] ;;
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reload:sshd.service|reload:ssh.service) consume_result RELOAD_RESULTS ;;
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*) exit 97 ;;
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esac
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''')
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write_executable(stub_dir / "mktemp", common + r'''
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log mktemp "$@"
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artifact="$(/usr/bin/mktemp "$@")" || exit
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case "$artifact" in
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*.tmp)
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if [[ -e "$PANAMA_BOOT_FIXTURE_ROOT/state/HOLD_CANDIDATE_PREPARATION" ]]; then
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: >"$PANAMA_BOOT_FIXTURE_ROOT/state/CANDIDATE_PREPARING"
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while [[ ! -e "$PANAMA_BOOT_FIXTURE_ROOT/state/RELEASE_CANDIDATE_PREPARATION" ]]; do
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/usr/bin/sleep 0.01
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done
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fi
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;;
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*.backup)
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if [[ -e "$PANAMA_BOOT_FIXTURE_ROOT/state/HOLD_BACKUP_MKTEMP" ]]; then
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: >"$PANAMA_BOOT_FIXTURE_ROOT/state/BACKUP_MKTEMP_RUNNING"
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while [[ ! -e "$PANAMA_BOOT_FIXTURE_ROOT/state/RELEASE_BACKUP_MKTEMP" ]]; do
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/usr/bin/sleep 0.01
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done
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fi
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;;
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esac
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printf '%s\n' "$artifact"
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''')
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write_executable(stub_dir / "cp", common + r'''
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log cp "$@"
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destination="${@: -1}"
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if [[ "$destination" == *.backup && -e "$PANAMA_BOOT_FIXTURE_ROOT/state/HOLD_BACKUP_PREPARATION" ]]; then
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: >"$PANAMA_BOOT_FIXTURE_ROOT/state/BACKUP_PREPARING"
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while [[ ! -e "$PANAMA_BOOT_FIXTURE_ROOT/state/RELEASE_BACKUP_PREPARATION" ]]; do
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/usr/bin/sleep 0.01
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done
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fi
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exec /usr/bin/cp "$@"
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''')
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write_executable(stub_dir / "mv", common + r'''
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log mv "$@" "source-mode=$(/usr/bin/stat -c %a -- "${3:-}")"
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if [[ "${3:-}" == *.tmp && -e "$PANAMA_BOOT_FIXTURE_ROOT/state/HOLD_BEFORE_ACTIVATION" ]]; then
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: >"$PANAMA_BOOT_FIXTURE_ROOT/state/TRANSACTION_ARMED"
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while [[ ! -e "$PANAMA_BOOT_FIXTURE_ROOT/state/RELEASE_BEFORE_ACTIVATION" ]]; do
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/usr/bin/sleep 0.01
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done
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exit 98
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fi
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if [[ "${3:-}" == *.tmp ]]; then
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consume_result MV_ACTIVATION_RESULTS
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result=$?
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(( result == 0 )) || exit "$result"
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fi
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/usr/bin/mv "$@"
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if [[ "${3:-}" == *.tmp && -e "$PANAMA_BOOT_FIXTURE_ROOT/state/HOLD_ACTIVATION" ]]; then
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: >"$PANAMA_BOOT_FIXTURE_ROOT/state/ACTIVATED"
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while [[ ! -e "$PANAMA_BOOT_FIXTURE_ROOT/state/RELEASE_ACTIVATION" ]]; do
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/usr/bin/sleep 0.01
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done
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fi
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''')
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write_executable(stub_dir / "rm", common + r'''
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log rm "$@"
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if [[ "${1:-}" == -f && "${2:-}" == -- && "${3:-}" == *.backup ]]; then
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consume_result RM_BACKUP_RESULTS
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result=$?
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(( result == 0 )) || exit "$result"
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fi
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if [[ "${1:-}" == -f && "${2:-}" == -- && "${3:-}" == *.tmp ]]; then
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consume_result RM_CANDIDATE_RESULTS
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result=$?
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(( result == 0 )) || exit "$result"
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fi
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if [[ "${1:-}" == -f && "${2:-}" == -- && "${3:-}" == */00-panama.conf ]]; then
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consume_result RM_DROPIN_RESULTS
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result=$?
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(( result == 0 )) || exit "$result"
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fi
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exec /usr/bin/rm "$@"
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''')
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for command in ("chown", "useradd", "usermod"):
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write_executable(stub_dir / command, common + f'''\nlog {command} "$@"\nexit 97\n''')
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def configure_case(
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name: str,
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*,
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sshd_results: tuple[int, ...] = (),
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reload_results: tuple[int, ...] = (),
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mv_activation_results: tuple[int, ...] = (),
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rm_backup_results: tuple[int, ...] = (),
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rm_candidate_results: tuple[int, ...] = (),
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rm_dropin_results: tuple[int, ...] = (),
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prior_dropin: bytes | None = None,
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prior_dropin_kind: str = "regular",
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root_policy: str = (
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"permitrootlogin no\n"
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"passwordauthentication no\n"
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"kbdinteractiveauthentication no\n"
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),
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target_policy: str = (
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"passwordauthentication no\n"
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"kbdinteractiveauthentication no\n"
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),
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sshd_unit: bool = True,
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ssh_unit: bool = True,
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hold_activation: bool = False,
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hold_before_activation: bool = False,
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hold_candidate_preparation: bool = False,
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hold_backup_preparation: bool = False,
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) -> tuple[Path, Path]:
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fixture_root = work / name / "root"
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stub_dir = work / name / "bin"
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calls = fixture_root / "calls"
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state = fixture_root / "state"
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ssh_dir = fixture_root / "home/gib/.ssh"
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root_ssh_dir = fixture_root / "root/.ssh"
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(fixture_root / "etc/ssh/sshd_config.d").mkdir(parents=True)
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ssh_dir.mkdir(parents=True)
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root_ssh_dir.mkdir(parents=True)
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stub_dir.mkdir(parents=True)
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state.mkdir()
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calls.touch()
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(state / "target-uid").write_text("1000\n")
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(state / "home").write_text("/home/gib\n")
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(state / "target-dir-meta").write_text("1000:700\n")
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(state / "target-key-meta").write_text("1000:600\n")
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(state / "root-key-meta").write_text("0:600\n")
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(state / "SSHD_RESULTS").write_text("".join(f"{result}\n" for result in sshd_results))
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(state / "RELOAD_RESULTS").write_text("".join(f"{result}\n" for result in reload_results))
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(state / "MV_ACTIVATION_RESULTS").write_text(
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"".join(f"{result}\n" for result in mv_activation_results)
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)
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(state / "RM_BACKUP_RESULTS").write_text(
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"".join(f"{result}\n" for result in rm_backup_results)
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)
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(state / "RM_CANDIDATE_RESULTS").write_text(
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"".join(f"{result}\n" for result in rm_candidate_results)
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)
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(state / "RM_DROPIN_RESULTS").write_text(
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"".join(f"{result}\n" for result in rm_dropin_results)
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)
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(state / "ROOT_POLICY").write_text(root_policy)
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(state / "TARGET_POLICY").write_text(target_policy)
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(state / "SSHD_UNIT").write_text("present\n" if sshd_unit else "absent\n")
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(state / "SSH_UNIT").write_text("present\n" if ssh_unit else "absent\n")
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if hold_activation:
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(state / "HOLD_ACTIVATION").touch()
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if hold_before_activation:
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(state / "HOLD_BEFORE_ACTIVATION").touch()
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if hold_candidate_preparation:
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(state / "HOLD_CANDIDATE_PREPARATION").touch()
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if hold_backup_preparation:
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(state / "HOLD_BACKUP_PREPARATION").touch()
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(fixture_root / "stub-install").write_text(
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"#!/usr/bin/env bash\nprintf 'install-handoff %s\\n' \"${PANAMA_PATH:-unset}\" >> \"$PANAMA_BOOT_FIXTURE_ROOT/calls\"\n"
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)
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(fixture_root / "stub-install").chmod(0o755)
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make_stubs(stub_dir, fixture_root, calls)
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dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
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if prior_dropin_kind != "regular":
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if prior_dropin_kind == "symlink":
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symlink_target = fixture_root / "unsupported-panama-dropin"
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symlink_target.write_bytes(prior_dropin or b"unsupported symlink target\n")
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dropin.symlink_to(symlink_target)
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elif prior_dropin_kind == "directory":
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dropin.mkdir()
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elif prior_dropin_kind == "fifo":
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os.mkfifo(dropin)
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else:
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raise ValueError(prior_dropin_kind)
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|
elif prior_dropin is not None:
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dropin.write_bytes(prior_dropin)
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dropin.chmod(0o640)
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os.utime(dropin, ns=(1_700_000_000_123_456_789, 1_700_000_000_123_456_789))
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os.setxattr(dropin, b"user.panama-contract", b"preserve-me")
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subprocess.run(["setfacl", "-m", "u:65534:r--", dropin], check=True)
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target_keys = ssh_dir / "authorized_keys"
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root_keys = root_ssh_dir / "authorized_keys"
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if name == "missing":
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pass
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elif name == "empty":
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target_keys.touch()
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elif name == "comment-only":
|
|
target_keys.write_text("# no usable key\n\n")
|
|
elif name == "ssh-directory-symlink":
|
|
shutil.rmtree(ssh_dir)
|
|
alternate = fixture_root / "unsafe-ssh"
|
|
alternate.mkdir()
|
|
(fixture_root / "home/gib/.ssh").symlink_to(alternate)
|
|
elif name == "authorized-keys-symlink":
|
|
alternate = fixture_root / "unsafe-authorized-keys"
|
|
alternate.write_text(TARGET_PUBLIC_KEY)
|
|
target_keys.symlink_to(alternate)
|
|
elif name == "malformed-key":
|
|
target_keys.write_text("this is not OpenSSH key material\n")
|
|
elif name == "mixed-valid-and-malformed-key":
|
|
target_keys.write_text(TARGET_PUBLIC_KEY + "this is not OpenSSH key material\n")
|
|
elif name == "malformed-root-key":
|
|
root_keys.write_text("this is not OpenSSH key material\n")
|
|
elif name == "directory-wrong-mode":
|
|
target_keys.write_text(TARGET_PUBLIC_KEY)
|
|
(state / "target-dir-meta").write_text("1000:755\n")
|
|
elif name == "root-copy-directory-wrong-mode":
|
|
root_keys.write_text(ROOT_PUBLIC_KEY)
|
|
(state / "target-dir-meta").write_text("1000:755\n")
|
|
elif name == "file-wrong-mode":
|
|
target_keys.write_text(TARGET_PUBLIC_KEY)
|
|
(state / "target-key-meta").write_text("1000:644\n")
|
|
elif name == "directory-wrong-owner":
|
|
target_keys.write_text(TARGET_PUBLIC_KEY)
|
|
(state / "target-dir-meta").write_text("0:700\n")
|
|
elif name == "file-wrong-owner":
|
|
target_keys.write_text(TARGET_PUBLIC_KEY)
|
|
(state / "target-key-meta").write_text("0:600\n")
|
|
elif name == "root-target-account":
|
|
target_keys.write_text(TARGET_PUBLIC_KEY)
|
|
(state / "target-uid").write_text("0\n")
|
|
elif name == "relative-home":
|
|
target_keys.write_text(TARGET_PUBLIC_KEY)
|
|
(state / "home").write_text("home/gib\n")
|
|
elif name in (
|
|
"safe-existing-key",
|
|
"declines-hardening",
|
|
"missing-ssh-unit",
|
|
"preexisting-dropin-symlink",
|
|
"preexisting-dropin-directory",
|
|
"preexisting-dropin-fifo",
|
|
"success-without-prior-dropin",
|
|
"success-replaces-prior-dropin",
|
|
"candidate-invalid",
|
|
"candidate-invalid-without-prior",
|
|
"candidate-reload-fails",
|
|
"candidate-reload-fails-without-prior",
|
|
"rollback-validation-fails",
|
|
"rollback-reload-fails",
|
|
"rollback-removal-fails-without-prior",
|
|
"effective-root-policy-conflict",
|
|
"effective-target-policy-conflict",
|
|
"success-backup-cleanup-fails",
|
|
"rollback-backup-cleanup-fails",
|
|
"signal-int-restores-prior",
|
|
"signal-term-removes-new-dropin",
|
|
"candidate-cleanup-fails",
|
|
"signal-int-before-activation-prior",
|
|
"signal-term-before-activation-no-prior",
|
|
"signal-int-before-activation-cleanup-fails",
|
|
"signal-int-during-candidate-preparation",
|
|
"signal-term-during-backup-preparation",
|
|
):
|
|
target_keys.write_text(TARGET_PUBLIC_KEY)
|
|
elif name == "safe-root-key-copy":
|
|
shutil.rmtree(ssh_dir)
|
|
(state / "target-dir-meta").write_text("missing\n")
|
|
(state / "target-key-meta").write_text("missing\n")
|
|
root_keys.write_text(ROOT_PUBLIC_KEY)
|
|
else:
|
|
raise ValueError(name)
|
|
return fixture_root, stub_dir
|
|
|
|
|
|
def run_case(
|
|
name: str,
|
|
*,
|
|
signal_after_activation: int | None = None,
|
|
signal_before_activation: int | None = None,
|
|
signal_during_candidate_preparation: int | None = None,
|
|
signal_during_backup_preparation: int | None = None,
|
|
harden_answer: str = "Y",
|
|
prior_traps: bool = False,
|
|
**configuration: object,
|
|
) -> tuple[int, str, str, Path, int]:
|
|
fixture_root, stub_dir = configure_case(
|
|
name,
|
|
hold_activation=signal_after_activation is not None,
|
|
hold_before_activation=signal_before_activation is not None,
|
|
hold_candidate_preparation=signal_during_candidate_preparation is not None,
|
|
hold_backup_preparation=signal_during_backup_preparation is not None,
|
|
**configuration,
|
|
)
|
|
master, slave = pty.openpty()
|
|
|
|
def attach_terminal() -> None:
|
|
# The test runner launches contracts as background jobs, which inherit
|
|
# SIGINT ignored. A real interactive bootstrap starts with SIGINT at
|
|
# its default disposition, so restore that state before exec.
|
|
signal.signal(signal.SIGINT, signal.SIG_DFL)
|
|
fcntl.ioctl(0, termios.TIOCSCTTY, 0)
|
|
|
|
env = {
|
|
**os.environ,
|
|
"PATH": f"{stub_dir}:/usr/bin:/bin",
|
|
"PANAMA_BOOT_FIXTURE_ROOT": str(fixture_root),
|
|
"PANAMA_BOOT_REVISION": BOOT_REVISION,
|
|
"PANAMA_BOOT_SHA256": BOOT_SHA256,
|
|
"PANAMA_PATH": f"{fixture_root}/home/gib/.local/share/Panama",
|
|
"HOME": f"{fixture_root}/root",
|
|
}
|
|
if prior_traps:
|
|
bash_env = fixture_root / "prior-traps"
|
|
bash_env.write_text(
|
|
'''if [[ "$0" == "$PANAMA_BOOT_SCRIPT" ]]; then
|
|
trap 'printf "prior-exit %s\\n" "$BASHPID" >>"$PANAMA_BOOT_FIXTURE_ROOT/calls"' EXIT
|
|
trap 'printf "prior-int %s\\n" "$BASHPID" >>"$PANAMA_BOOT_FIXTURE_ROOT/calls"' INT
|
|
trap 'printf "prior-term %s\\n" "$BASHPID" >>"$PANAMA_BOOT_FIXTURE_ROOT/calls"' TERM
|
|
fi
|
|
'''
|
|
)
|
|
env["BASH_ENV"] = str(bash_env)
|
|
env["PANAMA_BOOT_SCRIPT"] = boot
|
|
process = subprocess.Popen(
|
|
["bash", boot, "--server"],
|
|
stdin=slave,
|
|
stdout=slave,
|
|
stderr=slave,
|
|
env=env,
|
|
start_new_session=True,
|
|
preexec_fn=attach_terminal,
|
|
)
|
|
os.close(slave)
|
|
os.write(master, f"gib\n{harden_answer}\n".encode())
|
|
if signal_during_candidate_preparation is not None:
|
|
marker = fixture_root / "state/CANDIDATE_PREPARING"
|
|
deadline = time.monotonic() + 5
|
|
while not marker.exists() and process.poll() is None and time.monotonic() < deadline:
|
|
time.sleep(0.01)
|
|
if not marker.exists():
|
|
note(f"{name}: fixture did not observe candidate preparation before signaling")
|
|
else:
|
|
os.kill(process.pid, signal_during_candidate_preparation)
|
|
(fixture_root / "state/RELEASE_CANDIDATE_PREPARATION").touch()
|
|
elif signal_during_backup_preparation is not None:
|
|
marker = fixture_root / "state/BACKUP_PREPARING"
|
|
deadline = time.monotonic() + 5
|
|
while not marker.exists() and process.poll() is None and time.monotonic() < deadline:
|
|
time.sleep(0.01)
|
|
if not marker.exists():
|
|
note(f"{name}: fixture did not observe backup preparation before signaling")
|
|
else:
|
|
os.kill(process.pid, signal_during_backup_preparation)
|
|
(fixture_root / "state/RELEASE_BACKUP_PREPARATION").touch()
|
|
elif signal_before_activation is not None:
|
|
armed = fixture_root / "state/TRANSACTION_ARMED"
|
|
deadline = time.monotonic() + 5
|
|
while not armed.exists() and process.poll() is None and time.monotonic() < deadline:
|
|
time.sleep(0.01)
|
|
if not armed.exists():
|
|
note(f"{name}: fixture did not observe transaction arming before signaling")
|
|
else:
|
|
os.kill(process.pid, signal_before_activation)
|
|
(fixture_root / "state/RELEASE_BEFORE_ACTIVATION").touch()
|
|
elif signal_after_activation is not None:
|
|
activation = fixture_root / "state/ACTIVATED"
|
|
deadline = time.monotonic() + 5
|
|
while not activation.exists() and process.poll() is None and time.monotonic() < deadline:
|
|
time.sleep(0.01)
|
|
if not activation.exists():
|
|
note(f"{name}: fixture did not observe atomic activation before signaling")
|
|
else:
|
|
os.kill(process.pid, signal_after_activation)
|
|
(fixture_root / "state/RELEASE_ACTIVATION").touch()
|
|
chunks: list[bytes] = []
|
|
deadline = time.monotonic() + 8
|
|
timed_out = False
|
|
while True:
|
|
readable, _, _ = select.select([master], [], [], 0.1)
|
|
if not readable:
|
|
if process.poll() is not None:
|
|
break
|
|
if time.monotonic() >= deadline:
|
|
timed_out = True
|
|
os.killpg(process.pid, signal.SIGKILL)
|
|
process.wait()
|
|
continue
|
|
continue
|
|
try:
|
|
chunk = os.read(master, 4096)
|
|
except OSError as error:
|
|
if error.errno == errno.EIO:
|
|
break
|
|
raise
|
|
if not chunk:
|
|
break
|
|
chunks.append(chunk)
|
|
os.close(master)
|
|
status = process.wait()
|
|
if timed_out:
|
|
note(f"{name}: bootstrap timed out, likely while reading an unsupported object")
|
|
calls = (fixture_root / "calls").read_text()
|
|
output = b"".join(chunks).decode(errors="replace")
|
|
return status, output, calls, fixture_root, process.pid
|
|
|
|
|
|
guard_root = work / "actual-root-fixture-guard"
|
|
guard_root.mkdir()
|
|
guard_env = {
|
|
**os.environ,
|
|
"PANAMA_BOOT_FIXTURE_ROOT": str(guard_root),
|
|
"PANAMA_BOOT_REVISION": BOOT_REVISION,
|
|
"PANAMA_BOOT_SHA256": BOOT_SHA256,
|
|
"HOME": str(guard_root),
|
|
}
|
|
if os.geteuid() == 0:
|
|
guard_command = ["bash", boot, "--server"]
|
|
else:
|
|
guard_command = ["unshare", "--user", "--map-root-user", "--", "bash", boot, "--server"]
|
|
try:
|
|
guard_result = subprocess.run(
|
|
guard_command,
|
|
env=guard_env,
|
|
capture_output=True,
|
|
text=True,
|
|
timeout=5,
|
|
)
|
|
except (FileNotFoundError, subprocess.TimeoutExpired) as error:
|
|
note(f"actual-root-fixture-guard: could not create a hermetic root process: {error}")
|
|
else:
|
|
if guard_result.returncode != 1:
|
|
note(
|
|
"actual-root-fixture-guard: actual root did not reject "
|
|
f"PANAMA_BOOT_FIXTURE_ROOT with status 1: {guard_result.returncode}"
|
|
)
|
|
if "PANAMA_BOOT_FIXTURE_ROOT is test-only" not in guard_result.stderr:
|
|
note("actual-root-fixture-guard: rejection diagnostic was missing")
|
|
if any(guard_root.iterdir()):
|
|
note("actual-root-fixture-guard: boot mutated its rejected fixture root")
|
|
|
|
|
|
unsafe_cases = (
|
|
"missing",
|
|
"empty",
|
|
"comment-only",
|
|
"malformed-key",
|
|
"mixed-valid-and-malformed-key",
|
|
"malformed-root-key",
|
|
"ssh-directory-symlink",
|
|
"authorized-keys-symlink",
|
|
"directory-wrong-mode",
|
|
"root-copy-directory-wrong-mode",
|
|
"file-wrong-mode",
|
|
"directory-wrong-owner",
|
|
"file-wrong-owner",
|
|
"root-target-account",
|
|
"relative-home",
|
|
)
|
|
for case in unsafe_cases:
|
|
status, output, calls, fixture_root, _ = run_case(case)
|
|
if status != 0:
|
|
note(f"{case}: bootstrap stopped with status {status}: {output.strip()}")
|
|
if "SSH hardening unavailable" not in output:
|
|
note(f"{case}: unsafe login path did not explain why hardening was unavailable")
|
|
if "sshd -t" in calls:
|
|
note(f"{case}: unsafe login path validated sshd")
|
|
if "systemctl reload" in calls:
|
|
note(f"{case}: unsafe login path reloaded SSH")
|
|
if (fixture_root / "etc/ssh/sshd_config.d/00-panama.conf").exists():
|
|
note(f"{case}: unsafe login path changed the SSH drop-in")
|
|
if case == "root-copy-directory-wrong-mode" and (
|
|
fixture_root / "home/gib/.ssh/authorized_keys"
|
|
).exists():
|
|
note("root-copy-directory-wrong-mode: copied a root key into an unsafe SSH directory")
|
|
if "install-handoff " not in calls:
|
|
note(f"{case}: unsafe login path did not hand off to install")
|
|
|
|
desired_dropin = (
|
|
b"PermitRootLogin no\n"
|
|
b"PasswordAuthentication no\n"
|
|
b"KbdInteractiveAuthentication no\n"
|
|
)
|
|
prior_dropin = b"# prior Panama settings\nPasswordAuthentication yes\n"
|
|
|
|
for case in ("safe-existing-key", "safe-root-key-copy"):
|
|
status, output, calls, fixture_root, _ = run_case(case)
|
|
if status != 0:
|
|
note(f"{case}: safe login path stopped with status {status}: {output.strip()}")
|
|
if "SSH hardening unavailable" in output:
|
|
note(f"{case}: safe login path was rejected: {output.strip()} | {calls.strip()}")
|
|
if "systemctl reload" not in calls:
|
|
note(f"{case}: safe login path did not reach SSH hardening")
|
|
if "install-handoff " not in calls:
|
|
note(f"{case}: safe login path did not hand off to install")
|
|
dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
if (dropin.read_bytes() if dropin.exists() else None) != desired_dropin:
|
|
note(f"{case}: safe login path did not write the expected SSH drop-in")
|
|
if case == "safe-root-key-copy":
|
|
keys = fixture_root / "home/gib/.ssh/authorized_keys"
|
|
ssh_dir = keys.parent
|
|
if not keys.exists() or keys.read_text() != ROOT_PUBLIC_KEY:
|
|
note("safe-root-key-copy: root key was not copied to the target account")
|
|
if keys.exists() and (
|
|
ssh_dir.stat().st_mode & 0o777 != 0o700
|
|
or keys.stat().st_mode & 0o777 != 0o600
|
|
):
|
|
note("safe-root-key-copy: destination modes were not normalized to 0700/0600")
|
|
call_lines = calls.splitlines()
|
|
install_dir = (
|
|
f"runuser -u gib -- install -d -m 0700 -- {ssh_dir} "
|
|
)
|
|
install_key = (
|
|
"runuser -u gib -- install -m 0600 -- "
|
|
f"/dev/stdin {keys} "
|
|
)
|
|
if install_dir not in call_lines or install_key not in call_lines:
|
|
note("safe-root-key-copy: destination creation and writing did not run as the target user")
|
|
else:
|
|
validation_indices = [
|
|
index
|
|
for index, line in enumerate(call_lines)
|
|
if line.startswith("ssh-keygen -l -f ")
|
|
]
|
|
if not validation_indices or max(validation_indices) < call_lines.index(install_key):
|
|
note("safe-root-key-copy: copied key validity was not rechecked after installation")
|
|
if any(line.startswith("chown ") for line in call_lines):
|
|
note("safe-root-key-copy: bootstrap still assumes the primary group matches the username")
|
|
|
|
status, output, calls, fixture_root, _ = run_case(
|
|
"declines-hardening",
|
|
harden_answer="n",
|
|
)
|
|
declined_dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
if status != 0 or "install-handoff " not in calls:
|
|
note("declines-hardening: declining did not continue to install")
|
|
if declined_dropin.exists() or "sshd " in calls or "systemctl reload " in calls:
|
|
note("declines-hardening: declining changed or validated SSH state")
|
|
|
|
status, output, calls, fixture_root, _ = run_case(
|
|
"missing-ssh-unit",
|
|
sshd_unit=False,
|
|
ssh_unit=False,
|
|
)
|
|
missing_unit_dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
if status != 0 or "install-handoff " not in calls:
|
|
note("missing-ssh-unit: unavailable hardening did not continue to install")
|
|
if "SSH hardening unavailable" not in output:
|
|
note("missing-ssh-unit: missing units did not explain that hardening was unavailable")
|
|
if missing_unit_dropin.exists() or "sshd " in calls or "systemctl reload " in calls:
|
|
note("missing-ssh-unit: unavailable hardening changed or validated SSH state")
|
|
|
|
unsupported_dropins = {
|
|
"preexisting-dropin-symlink": "symlink",
|
|
"preexisting-dropin-directory": "directory",
|
|
"preexisting-dropin-fifo": "fifo",
|
|
}
|
|
for case, kind in unsupported_dropins.items():
|
|
status, output, calls, fixture_root, _ = run_case(
|
|
case,
|
|
prior_dropin=prior_dropin,
|
|
prior_dropin_kind=kind,
|
|
)
|
|
dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
if status != 0 or "install-handoff " not in calls:
|
|
note(f"{case}: unsupported object did not continue to install")
|
|
if "SSH hardening unavailable" not in output:
|
|
note(f"{case}: unsupported object did not explain that hardening was unavailable")
|
|
if "sshd " in calls or "systemctl reload " in calls:
|
|
note(f"{case}: unsupported object reached SSH validation or reload")
|
|
if kind == "symlink" and not dropin.is_symlink():
|
|
note(f"{case}: pre-existing symlink was changed")
|
|
if kind == "directory" and not dropin.is_dir():
|
|
note(f"{case}: pre-existing directory was changed")
|
|
if kind == "fifo" and not stat_module.S_ISFIFO(dropin.lstat().st_mode):
|
|
note(f"{case}: pre-existing FIFO was changed")
|
|
|
|
|
|
def regular_metadata(path: Path) -> tuple[object, ...]:
|
|
metadata = path.stat()
|
|
xattrs = tuple((name, os.getxattr(path, name)) for name in sorted(os.listxattr(path)))
|
|
acl = subprocess.check_output(["getfacl", "-cp", path])
|
|
return (
|
|
stat_module.S_IMODE(metadata.st_mode),
|
|
metadata.st_uid,
|
|
metadata.st_gid,
|
|
metadata.st_mtime_ns,
|
|
xattrs,
|
|
acl,
|
|
)
|
|
|
|
|
|
metadata_reference = work / "prior-dropin-metadata-reference"
|
|
metadata_reference.write_bytes(prior_dropin)
|
|
metadata_reference.chmod(0o640)
|
|
os.utime(
|
|
metadata_reference,
|
|
ns=(1_700_000_000_123_456_789, 1_700_000_000_123_456_789),
|
|
)
|
|
os.setxattr(metadata_reference, b"user.panama-contract", b"preserve-me")
|
|
subprocess.run(["setfacl", "-m", "u:65534:r--", metadata_reference], check=True)
|
|
expected_prior_metadata = regular_metadata(metadata_reference)
|
|
|
|
|
|
transaction_cases = {
|
|
"success-without-prior-dropin": {
|
|
"sshd_results": (0,),
|
|
"reload_results": (0,),
|
|
"prior_dropin": None,
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": True,
|
|
},
|
|
"success-replaces-prior-dropin": {
|
|
"sshd_results": (0,),
|
|
"reload_results": (0,),
|
|
"prior_dropin": prior_dropin,
|
|
"sshd_unit": False,
|
|
"ssh_unit": True,
|
|
"succeeds": True,
|
|
},
|
|
"candidate-invalid": {
|
|
"sshd_results": (1, 0),
|
|
"reload_results": (),
|
|
"prior_dropin": prior_dropin,
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
},
|
|
"candidate-invalid-without-prior": {
|
|
"sshd_results": (1, 0),
|
|
"reload_results": (),
|
|
"prior_dropin": None,
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
},
|
|
"candidate-reload-fails": {
|
|
"sshd_results": (0, 0),
|
|
"reload_results": (1, 0),
|
|
"prior_dropin": prior_dropin,
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
},
|
|
"candidate-reload-fails-without-prior": {
|
|
"sshd_results": (0, 0),
|
|
"reload_results": (1, 0),
|
|
"prior_dropin": None,
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
},
|
|
"rollback-validation-fails": {
|
|
"sshd_results": (0, 1),
|
|
"reload_results": (1,),
|
|
"prior_dropin": prior_dropin,
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
"rollback_fails": True,
|
|
},
|
|
"rollback-reload-fails": {
|
|
"sshd_results": (0, 0),
|
|
"reload_results": (1, 1),
|
|
"prior_dropin": prior_dropin,
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
"rollback_fails": True,
|
|
},
|
|
"rollback-removal-fails-without-prior": {
|
|
"sshd_results": (1, 1),
|
|
"reload_results": (),
|
|
"rm_dropin_results": (1,),
|
|
"prior_dropin": None,
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
"rollback_fails": True,
|
|
"settled_dropin": desired_dropin,
|
|
},
|
|
"effective-root-policy-conflict": {
|
|
"sshd_results": (0, 0),
|
|
"reload_results": (),
|
|
"prior_dropin": prior_dropin,
|
|
"root_policy": (
|
|
"permitrootlogin yes\n"
|
|
"passwordauthentication no\n"
|
|
"kbdinteractiveauthentication no\n"
|
|
),
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
},
|
|
"effective-target-policy-conflict": {
|
|
"sshd_results": (0, 0),
|
|
"reload_results": (),
|
|
"prior_dropin": prior_dropin,
|
|
"target_policy": (
|
|
"passwordauthentication no\n"
|
|
"kbdinteractiveauthentication yes\n"
|
|
),
|
|
"sshd_unit": True,
|
|
"ssh_unit": True,
|
|
"succeeds": False,
|
|
},
|
|
}
|
|
|
|
for case, expected in transaction_cases.items():
|
|
configuration = {
|
|
key: value
|
|
for key, value in expected.items()
|
|
if key not in {"succeeds", "rollback_fails", "settled_dropin"}
|
|
}
|
|
status, output, calls, fixture_root, _ = run_case(case, **configuration)
|
|
call_lines = calls.splitlines()
|
|
dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
sshd_dir = dropin.parent
|
|
validations = [index for index, line in enumerate(call_lines) if line.startswith("sshd -t ")]
|
|
reloads = [
|
|
index
|
|
for index, line in enumerate(call_lines)
|
|
if line.startswith("systemctl reload ")
|
|
]
|
|
activation_lines = [
|
|
(index, line)
|
|
for index, line in enumerate(call_lines)
|
|
if re.fullmatch(
|
|
rf"mv -f -- {re.escape(str(sshd_dir))}/\.00-panama\.[A-Za-z0-9]+\.tmp "
|
|
rf"{re.escape(str(dropin))} source-mode=600 ",
|
|
line,
|
|
)
|
|
]
|
|
restore_lines = [
|
|
index
|
|
for index, line in enumerate(call_lines)
|
|
if re.fullmatch(
|
|
rf"mv -f -- {re.escape(str(sshd_dir))}/\.00-panama\.[A-Za-z0-9]+\.restore "
|
|
rf"{re.escape(str(dropin))} source-mode=640 ",
|
|
line,
|
|
)
|
|
]
|
|
removal_lines = [
|
|
index
|
|
for index, line in enumerate(call_lines)
|
|
if line == f"rm -f -- {dropin} "
|
|
]
|
|
rollback_lines = restore_lines if expected["prior_dropin"] is not None else removal_lines
|
|
|
|
succeeds = bool(expected["succeeds"])
|
|
if succeeds and status != 0:
|
|
note(f"{case}: transaction stopped with status {status}: {output.strip()}")
|
|
if not succeeds and status == 0:
|
|
note(f"{case}: failed transaction returned success")
|
|
if succeeds and "install-handoff " not in calls:
|
|
note(f"{case}: successful transaction did not hand off to install")
|
|
if not succeeds and "install-handoff " in calls:
|
|
note(f"{case}: failed transaction handed off to install")
|
|
|
|
wanted_contents = (
|
|
desired_dropin
|
|
if succeeds
|
|
else expected.get("settled_dropin", expected["prior_dropin"])
|
|
)
|
|
actual_contents = dropin.read_bytes() if dropin.exists() else None
|
|
if actual_contents != wanted_contents:
|
|
note(f"{case}: SSH drop-in contents were not {'activated' if succeeds else 'restored'}")
|
|
|
|
if len(activation_lines) != 1:
|
|
note(f"{case}: candidate was not activated once through a restrictive same-directory rename")
|
|
root_policy_lines = [
|
|
index
|
|
for index, line in enumerate(call_lines)
|
|
if line == r"sshd -T -C user=root\,host=localhost\,addr=127.0.0.1 "
|
|
]
|
|
target_policy_lines = [
|
|
index
|
|
for index, line in enumerate(call_lines)
|
|
if line == r"sshd -T -C user=gib\,host=localhost\,addr=127.0.0.1 "
|
|
]
|
|
if case in {
|
|
"candidate-invalid",
|
|
"candidate-invalid-without-prior",
|
|
"rollback-removal-fails-without-prior",
|
|
}:
|
|
expected_policy_users: tuple[str, ...] = ()
|
|
elif case == "effective-root-policy-conflict":
|
|
expected_policy_users = ("root",)
|
|
else:
|
|
expected_policy_users = ("root", "gib")
|
|
if len(root_policy_lines) != (1 if "root" in expected_policy_users else 0):
|
|
note(f"{case}: effective root policy validation count was wrong")
|
|
if len(target_policy_lines) != (1 if "gib" in expected_policy_users else 0):
|
|
note(f"{case}: effective target policy validation count was wrong")
|
|
|
|
if succeeds:
|
|
if len(validations) != 1 or len(reloads) != 1:
|
|
note(f"{case}: success did not validate once and reload once")
|
|
elif root_policy_lines and target_policy_lines and activation_lines and not (
|
|
activation_lines[0][0]
|
|
< validations[0]
|
|
< root_policy_lines[0]
|
|
< target_policy_lines[0]
|
|
< reloads[0]
|
|
):
|
|
note(f"{case}: success did not activate, validate syntax and effective policy, then reload")
|
|
elif case in {
|
|
"candidate-invalid",
|
|
"candidate-invalid-without-prior",
|
|
"rollback-removal-fails-without-prior",
|
|
"effective-root-policy-conflict",
|
|
"effective-target-policy-conflict",
|
|
}:
|
|
if len(validations) != 2 or reloads:
|
|
note(f"{case}: rejected candidate did not validate candidate and restoration without reload")
|
|
elif activation_lines and rollback_lines:
|
|
policy_order = [
|
|
*root_policy_lines,
|
|
*target_policy_lines,
|
|
]
|
|
if not (
|
|
activation_lines[0][0]
|
|
< validations[0]
|
|
< (policy_order[0] if policy_order else rollback_lines[0])
|
|
and all(
|
|
left < right
|
|
for left, right in zip(policy_order, [*policy_order[1:], rollback_lines[0]])
|
|
)
|
|
and rollback_lines[0] < validations[1]
|
|
):
|
|
note(f"{case}: rollback command order was wrong")
|
|
else:
|
|
if len(validations) != 2 or len(reloads) != 2:
|
|
note(f"{case}: reload failure did not validate and reload the restored configuration")
|
|
elif activation_lines and rollback_lines and root_policy_lines and target_policy_lines and not (
|
|
activation_lines[0][0]
|
|
< validations[0]
|
|
< root_policy_lines[0]
|
|
< target_policy_lines[0]
|
|
< reloads[0]
|
|
< rollback_lines[0]
|
|
< validations[1]
|
|
< reloads[1]
|
|
):
|
|
note(f"{case}: rollback command order was wrong")
|
|
|
|
if succeeds and restore_lines:
|
|
note(f"{case}: successful transaction performed a rollback")
|
|
if not succeeds:
|
|
if len(rollback_lines) != 1:
|
|
note(f"{case}: pre-transaction SSH state was not restored exactly once")
|
|
if expected["prior_dropin"] is not None and dropin.exists():
|
|
if regular_metadata(dropin) != expected_prior_metadata:
|
|
note(f"{case}: rollback did not restore complete regular-file metadata")
|
|
|
|
detected_unit = "ssh.service" if case == "success-replaces-prior-dropin" else "sshd.service"
|
|
other_unit = "sshd.service" if detected_unit == "ssh.service" else "ssh.service"
|
|
reload_lines = [call_lines[index] for index in reloads]
|
|
if reload_lines and any(line != f"systemctl reload {detected_unit} " for line in reload_lines):
|
|
note(f"{case}: reloaded a unit other than detected {detected_unit}")
|
|
if any(line == f"systemctl reload {other_unit} " for line in call_lines):
|
|
note(f"{case}: guessed {other_unit} after reload failure")
|
|
if detected_unit == "sshd.service":
|
|
if "systemctl cat sshd.service " not in call_lines:
|
|
note(f"{case}: did not detect sshd.service")
|
|
if "systemctl cat ssh.service " in call_lines:
|
|
note(f"{case}: probed ssh.service after finding sshd.service")
|
|
elif not (
|
|
"systemctl cat sshd.service " in call_lines
|
|
and "systemctl cat ssh.service " in call_lines
|
|
and call_lines.index("systemctl cat sshd.service ")
|
|
< call_lines.index("systemctl cat ssh.service ")
|
|
):
|
|
note(f"{case}: did not fall back from absent sshd.service to ssh.service")
|
|
|
|
artifacts = list(sshd_dir.glob(".00-panama.*"))
|
|
rollback_fails = bool(expected.get("rollback_fails", False))
|
|
if not rollback_fails and artifacts:
|
|
note(f"{case}: successful or cleanly rolled-back transaction left temporary artifacts")
|
|
if rollback_fails:
|
|
backups = [artifact for artifact in artifacts if artifact.name.endswith(".backup")]
|
|
if expected["prior_dropin"] is None:
|
|
if backups:
|
|
note(f"{case}: no-prior-file recovery retained a nonexistent backup")
|
|
expected_remove = f"rm -f -- {dropin.resolve()}"
|
|
if expected_remove not in output or "cp -a --" in output:
|
|
note(f"{case}: no-prior-file recovery did not instruct removal of the installed drop-in")
|
|
elif len(backups) != 1:
|
|
note(f"{case}: rollback failure did not retain exactly one backup")
|
|
else:
|
|
backup = backups[0]
|
|
if backup.parent != sshd_dir or backup.read_bytes() != prior_dropin:
|
|
note(f"{case}: retained backup was not a same-directory copy")
|
|
if regular_metadata(backup) != expected_prior_metadata:
|
|
note(f"{case}: retained backup did not preserve complete regular-file metadata")
|
|
if str(backup.resolve()) not in output:
|
|
note(f"{case}: recovery output omitted the absolute backup path")
|
|
if "sshd -t" not in output or f"systemctl reload {detected_unit}" not in output:
|
|
note(f"{case}: recovery output omitted validation or reload commands")
|
|
|
|
artifact_logs = [line for line in call_lines if line.startswith("ssh-artifact ")]
|
|
if expected["prior_dropin"] is not None and not any(
|
|
re.fullmatch(
|
|
rf"ssh-artifact {re.escape(str(sshd_dir))}/\.00-panama\.[A-Za-z0-9]+\.backup 640 ",
|
|
line,
|
|
)
|
|
for line in artifact_logs
|
|
):
|
|
note(f"{case}: backup was not collision-safe, same-directory, non-.conf, and restrictive")
|
|
|
|
cleanup_failure_cases = {
|
|
"success-backup-cleanup-fails": {
|
|
"sshd_results": (0,),
|
|
"reload_results": (0,),
|
|
"rm_backup_results": (1,),
|
|
"expected_dropin": desired_dropin,
|
|
"expected_validations": 1,
|
|
"expected_reloads": 1,
|
|
},
|
|
"rollback-backup-cleanup-fails": {
|
|
"sshd_results": (1, 0),
|
|
"reload_results": (),
|
|
"rm_backup_results": (1,),
|
|
"expected_dropin": prior_dropin,
|
|
"expected_validations": 2,
|
|
"expected_reloads": 0,
|
|
},
|
|
}
|
|
|
|
for case, expected in cleanup_failure_cases.items():
|
|
status, output, calls, fixture_root, _ = run_case(
|
|
case,
|
|
sshd_results=expected["sshd_results"],
|
|
reload_results=expected["reload_results"],
|
|
rm_backup_results=expected["rm_backup_results"],
|
|
prior_dropin=prior_dropin,
|
|
)
|
|
dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
backups = list(dropin.parent.glob(".00-panama.*.backup"))
|
|
if status == 0:
|
|
note(f"{case}: cleanup failure returned success")
|
|
if "install-handoff " in calls:
|
|
note(f"{case}: cleanup failure handed off to install")
|
|
if dropin.read_bytes() != expected["expected_dropin"]:
|
|
note(f"{case}: cleanup failure changed the settled SSH drop-in")
|
|
if calls.count("sshd -t \n") != expected["expected_validations"]:
|
|
note(f"{case}: cleanup failure validation count was wrong")
|
|
if calls.count("systemctl reload sshd.service \n") != expected["expected_reloads"]:
|
|
note(f"{case}: cleanup failure reload count was wrong")
|
|
expected_policy_checks = 1 if case == "success-backup-cleanup-fails" else 0
|
|
if calls.count("sshd -T -C user=root\\,host=localhost\\,addr=127.0.0.1 \n") != expected_policy_checks:
|
|
note(f"{case}: cleanup failure root policy validation count was wrong")
|
|
if calls.count("sshd -T -C user=gib\\,host=localhost\\,addr=127.0.0.1 \n") != expected_policy_checks:
|
|
note(f"{case}: cleanup failure target policy validation count was wrong")
|
|
if len(backups) != 1:
|
|
note(f"{case}: failed cleanup did not retain exactly one backup")
|
|
else:
|
|
backup = backups[0]
|
|
if str(backup.resolve()) not in output or "rm -f --" not in output:
|
|
note(f"{case}: retained backup was not reported with an actionable cleanup command")
|
|
if regular_metadata(backup) != expected_prior_metadata:
|
|
note(f"{case}: cleanup failure backup lost regular-file metadata")
|
|
|
|
status, output, calls, fixture_root, _ = run_case(
|
|
"candidate-cleanup-fails",
|
|
mv_activation_results=(1,),
|
|
rm_candidate_results=(1,),
|
|
)
|
|
dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
candidates = list(dropin.parent.glob(".00-panama.*.tmp"))
|
|
if status == 0:
|
|
note("candidate-cleanup-fails: activation cleanup failure returned success")
|
|
if dropin.exists():
|
|
note("candidate-cleanup-fails: failed activation changed the final drop-in")
|
|
if "install-handoff " in calls:
|
|
note("candidate-cleanup-fails: failed activation reached install handoff")
|
|
if len(candidates) != 1:
|
|
note("candidate-cleanup-fails: failed cleanup did not retain exactly one candidate")
|
|
else:
|
|
candidate = candidates[0]
|
|
if str(candidate.resolve()) not in output or "rm -f --" not in output:
|
|
note("candidate-cleanup-fails: retained candidate lacked an actionable cleanup command")
|
|
|
|
signal_cases = {
|
|
"signal-int-restores-prior": {
|
|
"signal": signal.SIGINT,
|
|
"status": 130,
|
|
"prior_dropin": prior_dropin,
|
|
},
|
|
"signal-term-removes-new-dropin": {
|
|
"signal": signal.SIGTERM,
|
|
"status": 143,
|
|
"prior_dropin": None,
|
|
},
|
|
}
|
|
|
|
for case, expected in signal_cases.items():
|
|
status, output, calls, fixture_root, boot_pid = run_case(
|
|
case,
|
|
signal_after_activation=expected["signal"],
|
|
prior_traps=True,
|
|
sshd_results=(0,),
|
|
reload_results=(0,),
|
|
prior_dropin=expected["prior_dropin"],
|
|
)
|
|
dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
actual_dropin = dropin.read_bytes() if dropin.exists() else None
|
|
if status != expected["status"]:
|
|
note(f"{case}: signal returned status {status}, expected {expected['status']}")
|
|
if actual_dropin != expected["prior_dropin"]:
|
|
note(f"{case}: signal did not restore the pre-transaction SSH state")
|
|
if list(dropin.parent.glob(".00-panama.*")):
|
|
note(f"{case}: signal left transaction residue")
|
|
if "install-handoff " in calls:
|
|
note(f"{case}: signal reached install handoff")
|
|
if f"prior-exit {boot_pid}\n" not in calls:
|
|
note(f"{case}: signal suppressed the saved EXIT trap")
|
|
if calls.count("sshd -t \n") != 1:
|
|
note(f"{case}: signal did not validate restored configuration once")
|
|
if calls.count("systemctl reload sshd.service \n") != 1:
|
|
note(f"{case}: signal did not reload restored configuration once")
|
|
call_lines = calls.splitlines()
|
|
rollback_indices = [
|
|
index
|
|
for index, line in enumerate(call_lines)
|
|
if (
|
|
expected["prior_dropin"] is not None
|
|
and re.fullmatch(
|
|
rf"mv -f -- {re.escape(str(dropin.parent))}/\.00-panama\.[A-Za-z0-9]+\.restore "
|
|
rf"{re.escape(str(dropin))} source-mode=640 ",
|
|
line,
|
|
)
|
|
)
|
|
or (expected["prior_dropin"] is None and line == f"rm -f -- {dropin} ")
|
|
]
|
|
validation_indices = [
|
|
index for index, line in enumerate(call_lines) if line == "sshd -t "
|
|
]
|
|
reload_indices = [
|
|
index
|
|
for index, line in enumerate(call_lines)
|
|
if line == "systemctl reload sshd.service "
|
|
]
|
|
if not (
|
|
len(rollback_indices) == len(validation_indices) == len(reload_indices) == 1
|
|
and rollback_indices[0] < validation_indices[0] < reload_indices[0]
|
|
):
|
|
note(f"{case}: signal did not restore, validate, then reload in order")
|
|
if expected["prior_dropin"] is not None and regular_metadata(dropin) != expected_prior_metadata:
|
|
note(f"{case}: signal rollback did not restore complete regular-file metadata")
|
|
|
|
pre_activation_signal_cases = {
|
|
"signal-int-before-activation-prior": {
|
|
"signal": signal.SIGINT,
|
|
"status": 130,
|
|
"prior_dropin": prior_dropin,
|
|
"cleanup_fails": False,
|
|
},
|
|
"signal-term-before-activation-no-prior": {
|
|
"signal": signal.SIGTERM,
|
|
"status": 143,
|
|
"prior_dropin": None,
|
|
"cleanup_fails": False,
|
|
},
|
|
"signal-int-before-activation-cleanup-fails": {
|
|
"signal": signal.SIGINT,
|
|
"status": 130,
|
|
"prior_dropin": None,
|
|
"cleanup_fails": True,
|
|
},
|
|
}
|
|
|
|
for case, expected in pre_activation_signal_cases.items():
|
|
rm_candidate_results = (1,) if expected["cleanup_fails"] else ()
|
|
status, output, calls, fixture_root, boot_pid = run_case(
|
|
case,
|
|
signal_before_activation=expected["signal"],
|
|
prior_traps=True,
|
|
prior_dropin=expected["prior_dropin"],
|
|
rm_candidate_results=rm_candidate_results,
|
|
)
|
|
dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
actual_dropin = dropin.read_bytes() if dropin.exists() else None
|
|
candidates = list(dropin.parent.glob(".00-panama.*.tmp"))
|
|
backups = list(dropin.parent.glob(".00-panama.*.backup"))
|
|
if status != expected["status"]:
|
|
note(f"{case}: signal returned status {status}, expected {expected['status']}")
|
|
if actual_dropin != expected["prior_dropin"]:
|
|
note(f"{case}: pre-activation signal changed the final drop-in state")
|
|
if backups:
|
|
note(f"{case}: pre-activation signal left backup residue")
|
|
if expected["cleanup_fails"]:
|
|
if len(candidates) != 1:
|
|
note(f"{case}: injected cleanup failure did not retain exactly one candidate")
|
|
else:
|
|
candidate = candidates[0]
|
|
expected_command = f"rm -f -- {candidate.resolve()}"
|
|
if str(candidate.resolve()) not in output or expected_command not in output:
|
|
note(f"{case}: retained candidate lacked its absolute cleanup command")
|
|
elif candidates:
|
|
note(f"{case}: pre-activation signal left candidate residue")
|
|
if "install-handoff " in calls:
|
|
note(f"{case}: pre-activation signal reached install handoff")
|
|
if f"prior-exit {boot_pid}\n" not in calls:
|
|
note(f"{case}: pre-activation signal suppressed the saved EXIT trap")
|
|
if "sshd -t " in calls or "systemctl reload " in calls:
|
|
note(f"{case}: pre-activation signal validated or reloaded unchanged SSH state")
|
|
if ".restore " in calls or f"rm -f -- {dropin} " in calls:
|
|
note(f"{case}: pre-activation signal rewrote the unchanged final drop-in")
|
|
|
|
preparation_signal_cases = {
|
|
"signal-int-during-candidate-preparation": {
|
|
"signal": signal.SIGINT,
|
|
"status": 130,
|
|
"prior_dropin": None,
|
|
"phase": "candidate",
|
|
},
|
|
"signal-term-during-backup-preparation": {
|
|
"signal": signal.SIGTERM,
|
|
"status": 143,
|
|
"prior_dropin": prior_dropin,
|
|
"phase": "backup",
|
|
},
|
|
}
|
|
|
|
for case, expected in preparation_signal_cases.items():
|
|
signal_arguments = (
|
|
{"signal_during_candidate_preparation": expected["signal"]}
|
|
if expected["phase"] == "candidate"
|
|
else {"signal_during_backup_preparation": expected["signal"]}
|
|
)
|
|
status, output, calls, fixture_root, boot_pid = run_case(
|
|
case,
|
|
prior_traps=True,
|
|
prior_dropin=expected["prior_dropin"],
|
|
**signal_arguments,
|
|
)
|
|
dropin = fixture_root / "etc/ssh/sshd_config.d/00-panama.conf"
|
|
actual_dropin = dropin.read_bytes() if dropin.exists() else None
|
|
if status != expected["status"]:
|
|
note(f"{case}: signal returned status {status}, expected {expected['status']}")
|
|
if actual_dropin != expected["prior_dropin"]:
|
|
note(f"{case}: preparation signal changed the final drop-in")
|
|
if list(dropin.parent.glob(".00-panama.*")):
|
|
note(f"{case}: preparation signal left candidate or backup residue")
|
|
if "install-handoff " in calls:
|
|
note(f"{case}: preparation signal reached install handoff")
|
|
if f"prior-exit {boot_pid}\n" not in calls:
|
|
note(f"{case}: preparation signal suppressed the saved EXIT trap")
|
|
if "sshd " in calls or "systemctl reload " in calls:
|
|
note(f"{case}: preparation signal validated or reloaded unchanged SSH state")
|
|
if expected["prior_dropin"] is not None and regular_metadata(dropin) != expected_prior_metadata:
|
|
note(f"{case}: preparation signal changed prior regular-file metadata")
|
|
|
|
if findings:
|
|
print(f"root server bootstrap: {len(findings)} finding(s)", file=sys.stderr)
|
|
for finding in findings:
|
|
print(f" - {finding}", file=sys.stderr)
|
|
raise SystemExit(1)
|
|
|
|
print("root server bootstrap: PASS")
|
|
PY
|