deploy: isolate git and connector secrets

2026-08-04 15:04:39 +02:00
parent ff271d3cce
commit b5071f1494
7 changed files with 189 additions and 3 deletions
@@ -0,0 +1,127 @@
+#!/usr/bin/env bash
+# Render optional secret overrides with disposable sources and enforce their isolation contract.
+set -euo pipefail
+
+root="$(cd "$(dirname "$0")/.." && pwd -P)"
+fixture_root="$(mktemp -d "${TMPDIR:-/tmp}/thoth-compose-secret-policy.XXXXXX")"
+trap 'rm -rf "$fixture_root"' EXIT HUP INT TERM
+
+write_secret() {
+  local path="$1" value="$2"
+  printf '%s' "$value" >"$path"
+  chmod 600 "$path"
+}
+
+render() {
+  local name="$1"; shift
+  docker compose --env-file "$fixture_root/.env" -f "$root/compose.yaml" "$@" config --format json \
+    >"$fixture_root/$name.json"
+}
+
+assert_render_contract() {
+  local name="$1" expected_targets="$2"
+  node - "$fixture_root/$name.json" "$name" "$expected_targets" \
+    "$fixture_root/ssh-private-key" "$fixture_root/ssh-known-hosts" \
+    "$fixture_root/https-credentials" "$fixture_root/https-ca.pem" \
+    "$fixture_root/dwh-password" "$fixture_root/vector-password" <<'NODE'
+const fs = require("fs");
+
+const [configPath, name, expectedTargets, ...sourcePaths] = process.argv.slice(2);
+const config = JSON.parse(fs.readFileSync(configPath, "utf8"));
+const core = config.services?.core;
+if (!core) throw new Error(`${name}: missing core service`);
+if (name === "base" && (core.volumes || []).some((mount) => mount.source === "/dev/null")) {
+  throw new Error("base: /dev/null must never be used as a secret mount source");
+}
+
+const mountTargets = (core.volumes || [])
+  .filter((mount) => mount.target?.startsWith("/run/secrets/"))
+  .map((mount) => mount.target)
+  .sort();
+const expectedMountTargets = expectedTargets ? expectedTargets.split(",").filter(Boolean).sort() : [];
+if (mountTargets.join(",") !== expectedMountTargets.join(",")) {
+  throw new Error(`${name}: unexpected /run/secrets bind targets: ${mountTargets.join(",")}`);
+}
+for (const mount of (core.volumes || []).filter((item) => item.target?.startsWith("/run/secrets/"))) {
+  if (mount.type !== "bind" || !mount.read_only) {
+    throw new Error(`${name}: secret bind ${mount.target} must be read-only`);
+  }
+}
+
+const secretTargets = (core.secrets || []).map((secret) => secret.target).sort();
+if (name === "connector" && secretTargets.join(",") !== "psd-clinical-dwh-password,psd-clinical-vector-password") {
+  throw new Error(`${name}: connector secret targets do not match declared THT_WS_*_FILE paths`);
+}
+if (name !== "connector" && secretTargets.length !== 0) {
+  throw new Error(`${name}: unexpected Docker secrets`);
+}
+
+if (name === "ssh") {
+  const command = core.environment?.GIT_SSH_COMMAND || "";
+  for (const option of ["IdentitiesOnly=yes", "StrictHostKeyChecking=yes", "UserKnownHostsFile=/run/secrets/workspace-registry-git-known-hosts"]) {
+    if (!command.includes(option)) throw new Error(`ssh: missing strict SSH option ${option}`);
+  }
+}
+if (name === "https") {
+  if (core.environment?.GIT_CONFIG_VALUE_1 !== "/run/secrets/workspace-registry-git-ca") {
+    throw new Error("https: HTTPS CA verification is not configured");
+  }
+}
+
+const rendered = JSON.stringify(config);
+for (const secret of ["fixture-ssh-private-key", "fixture-ssh-known-hosts", "fixture-https-credentials", "fixture-https-ca", "fixture-dwh-password", "fixture-vector-password"]) {
+  if (rendered.includes(secret)) throw new Error(`${name}: rendered Compose leaked fixture secret value`);
+}
+for (const sourcePath of sourcePaths) {
+  if (!sourcePath.startsWith("/")) throw new Error(`${name}: fixture source must be absolute`);
+}
+NODE
+}
+
+assert_required_source() {
+  local variable="$1" override="$2"
+  local missing_env="$fixture_root/missing-$variable.env"
+  grep -v "^$variable=" "$fixture_root/.env" >"$missing_env"
+  if env -u "$variable" docker compose --env-file "$missing_env" -f "$root/compose.yaml" -f "$override" config --quiet \
+    >"$fixture_root/missing-$variable.out" 2>"$fixture_root/missing-$variable.err"; then
+    echo "selected override accepted missing $variable" >&2
+    exit 1
+  fi
+  grep -Fq "$variable" "$fixture_root/missing-$variable.err"
+}
+
+write_secret "$fixture_root/pi-auth.json" 'fixture-pi-auth'
+write_secret "$fixture_root/ssh-private-key" 'fixture-ssh-private-key'
+write_secret "$fixture_root/ssh-known-hosts" 'fixture-ssh-known-hosts'
+write_secret "$fixture_root/https-credentials" 'fixture-https-credentials'
+write_secret "$fixture_root/https-ca.pem" 'fixture-https-ca'
+write_secret "$fixture_root/dwh-password" 'fixture-dwh-password'
+write_secret "$fixture_root/vector-password" 'fixture-vector-password'
+
+printf '%s\n' \
+  'THT_WORKSPACE_GIT_REMOTE=https://git.example.invalid/platform/thoth-workspaces.git' \
+  "PI_AUTH_FILE=$fixture_root/pi-auth.json" \
+  "THT_WORKSPACE_GIT_SSH_KEY_FILE=$fixture_root/ssh-private-key" \
+  "THT_WORKSPACE_GIT_KNOWN_HOSTS_FILE=$fixture_root/ssh-known-hosts" \
+  "THT_WORKSPACE_GIT_CREDENTIALS_FILE=$fixture_root/https-credentials" \
+  "THT_WORKSPACE_GIT_CA_FILE=$fixture_root/https-ca.pem" \
+  "THT_WS_PSD_CLINICAL_DWH_PASSWORD_SOURCE=$fixture_root/dwh-password" \
+  "THT_WS_PSD_CLINICAL_VECTOR_PASSWORD_SOURCE=$fixture_root/vector-password" >"$fixture_root/.env"
+
+render base
+assert_render_contract base ''
+render ssh -f "$root/deploy/compose.git-ssh.yaml"
+assert_render_contract ssh '/run/secrets/workspace-registry-git-known-hosts,/run/secrets/workspace-registry-git-ssh-key'
+render https -f "$root/deploy/compose.git-https.yaml"
+assert_render_contract https '/run/secrets/workspace-registry-git-ca,/run/secrets/workspace-registry-git-credentials'
+render connector -f "$root/deploy/compose.connector-secrets.yaml"
+assert_render_contract connector ''
+
+assert_required_source THT_WORKSPACE_GIT_SSH_KEY_FILE "$root/deploy/compose.git-ssh.yaml"
+assert_required_source THT_WORKSPACE_GIT_KNOWN_HOSTS_FILE "$root/deploy/compose.git-ssh.yaml"
+assert_required_source THT_WORKSPACE_GIT_CREDENTIALS_FILE "$root/deploy/compose.git-https.yaml"
+assert_required_source THT_WORKSPACE_GIT_CA_FILE "$root/deploy/compose.git-https.yaml"
+assert_required_source THT_WS_PSD_CLINICAL_DWH_PASSWORD_SOURCE "$root/deploy/compose.connector-secrets.yaml"
+assert_required_source THT_WS_PSD_CLINICAL_VECTOR_PASSWORD_SOURCE "$root/deploy/compose.connector-secrets.yaml"
+
+echo "Compose secret policy passed."