diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..dbf6415 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +/dist/ +/vault-plugin-secrets-bind-tsig +*.out +*.test +.env diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml new file mode 100644 index 0000000..5b65ffe --- /dev/null +++ b/.pre-commit-config.yaml @@ -0,0 +1,15 @@ +repos: + - repo: https://github.com/pre-commit/pre-commit-hooks + rev: v5.0.0 + hooks: + - id: trailing-whitespace + - id: end-of-file-fixer + - id: check-yaml + - id: check-added-large-files + + - repo: https://github.com/dnephin/pre-commit-golang + rev: v0.5.1 + hooks: + - id: go-fmt + - id: go-vet + - id: go-mod-tidy diff --git a/.woodpecker/build.yml b/.woodpecker/build.yml new file mode 100644 index 0000000..74123b5 --- /dev/null +++ b/.woodpecker/build.yml @@ -0,0 +1,18 @@ +when: + - event: pull_request + +steps: + - name: build + image: golang:1.25 + commands: + - make build + backend_options: + kubernetes: + serviceAccountName: default + resources: + requests: + memory: 512Mi + cpu: 1 + limits: + memory: 2Gi + cpu: 2 diff --git a/.woodpecker/pre-commit.yaml b/.woodpecker/pre-commit.yaml new file mode 100644 index 0000000..d57b508 --- /dev/null +++ b/.woodpecker/pre-commit.yaml @@ -0,0 +1,18 @@ +when: + - event: pull_request + +steps: + - name: pre-commit + image: git.unkin.net/unkin/almalinux9-gobuilder:20260606 + commands: + - uvx pre-commit run --all-files + backend_options: + kubernetes: + serviceAccountName: default + resources: + requests: + memory: 512Mi + cpu: 1 + limits: + memory: 2Gi + cpu: 2 diff --git a/.woodpecker/release.yml b/.woodpecker/release.yml new file mode 100644 index 0000000..f1a4b5c --- /dev/null +++ b/.woodpecker/release.yml @@ -0,0 +1,47 @@ +when: + - event: tag + +steps: + - name: build + image: git.unkin.net/unkin/almalinux9-gobuilder:20260606 + commands: + - make build VERSION=${CI_COMMIT_TAG} + backend_options: + kubernetes: + serviceAccountName: default + resources: + requests: {memory: 512Mi, cpu: 1} + limits: {memory: 2Gi, cpu: 2} + + - name: package + image: git.unkin.net/unkin/almalinux9-rpmbuilder:latest + commands: + - ./scripts/build-rpm.sh ${CI_COMMIT_TAG} + depends_on: [build] + backend_options: + kubernetes: + serviceAccountName: default + resources: + requests: {memory: 512Mi, cpu: 1} + limits: {memory: 2Gi, cpu: 2} + + - name: upload + image: git.unkin.net/unkin/almalinux9-base:20260606 + commands: + - | + HOST="https://artifactapi.k8s.syd1.au.unkin.net" + REPO="rpm-internal" + for rpm in dist/*.rpm; do + FILE=$$(basename "$$rpm") + code=$$(curl -s -o /dev/null -w '%{http_code}' "$$HOST/api/v2/remotes/$$REPO/files/Packages/$$FILE" || true) + if [ "$$code" = "200" ]; then echo "$$FILE exists; skipping"; continue; fi + echo "Uploading $$FILE (probe $$code)" + curl -f -X PUT "$$HOST/api/v2/remotes/$$REPO/files/$$FILE" -H "Content-Type: application/x-rpm" --data-binary @"$$rpm" + done + depends_on: [package] + backend_options: + kubernetes: + serviceAccountName: default + resources: + requests: {memory: 128Mi, cpu: 100m} + limits: {memory: 512Mi, cpu: 500m} diff --git a/.woodpecker/test.yml b/.woodpecker/test.yml new file mode 100644 index 0000000..8e81e45 --- /dev/null +++ b/.woodpecker/test.yml @@ -0,0 +1,33 @@ +when: + - event: pull_request + +steps: + - name: lint + image: golang:1.25 + commands: + - make lint + backend_options: + kubernetes: + serviceAccountName: default + resources: + requests: + memory: 512Mi + cpu: 1 + limits: + memory: 2Gi + cpu: 2 + + - name: test + image: golang:1.25 + commands: + - make test + backend_options: + kubernetes: + serviceAccountName: default + resources: + requests: + memory: 512Mi + cpu: 1 + limits: + memory: 2Gi + cpu: 2 diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..6026d61 --- /dev/null +++ b/Makefile @@ -0,0 +1,77 @@ +.PHONY: build install test lint fmt clean tidy rpm rpm-package patch minor major check-go e2e e2e-vault e2e-openbao e2e-up e2e-down + +BINARY := vault-plugin-secrets-rancher +PKG := ./cmd/vault-plugin-secrets-rancher +VERSION ?= $(shell git describe --tags --always --dirty 2>/dev/null || echo "0.0.0-dev") +OS ?= $(shell go env GOOS) +ARCH ?= $(shell go env GOARCH) +PLUGIN_DIR ?= ./dist + +GO_VERSION_REQUIRED := 1.25 +GO_VERSION_ACTUAL := $(shell go version | sed 's/go version go\([0-9]*\.[0-9]*\).*/\1/') + +check-go: + @if [ "$$(printf '%s\n%s' "$(GO_VERSION_REQUIRED)" "$(GO_VERSION_ACTUAL)" | sort -V | head -1)" != "$(GO_VERSION_REQUIRED)" ]; then \ + echo "ERROR: Go >= $(GO_VERSION_REQUIRED) required, found $(GO_VERSION_ACTUAL)"; exit 1; \ + fi + +build: check-go tidy + CGO_ENABLED=0 GOOS=$(OS) GOARCH=$(ARCH) go build -ldflags="-s -w -X main.version=$(VERSION)" -o $(PLUGIN_DIR)/$(BINARY) $(PKG) + +install: build + @echo "Built $(PLUGIN_DIR)/$(BINARY) (register it with: vault plugin register -sha256= secret $(BINARY))" + +test: check-go + go test -race -count=1 ./... + +lint: check-go + go vet ./... + +fmt: check-go + gofmt -w . + +tidy: + go mod tidy + +clean: + rm -rf $(PLUGIN_DIR) + +rpm: build rpm-package + +rpm-package: + ./scripts/build-rpm.sh $(VERSION) + +# End-to-end tests bring up a mock companion API plus Vault and OpenBao in +# Docker and drive the full lifecycle against each with the same plugin binary. +e2e: + ./scripts/e2e.sh + +e2e-vault: + ENGINES=vault ./scripts/e2e.sh + +e2e-openbao: + ENGINES=openbao ./scripts/e2e.sh + +e2e-up: + docker compose -f test/docker-compose.yml up -d --build + +e2e-down: + docker compose -f test/docker-compose.yml down -v + +_LATEST := $(shell git tag --sort=-v:refname | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$$' | head -1) +_BASE := $(if $(_LATEST),$(_LATEST),v0.0.0) +_MAJ := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f1) +_MIN := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f2) +_PAT := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f3) + +patch: + @NEW=v$(_MAJ).$(_MIN).$(shell expr $(_PAT) + 1); \ + git tag $$NEW && echo "Tagged $$NEW" && git push origin $$NEW + +minor: + @NEW=v$(_MAJ).$(shell expr $(_MIN) + 1).0; \ + git tag $$NEW && echo "Tagged $$NEW" && git push origin $$NEW + +major: + @NEW=v$(shell expr $(_MAJ) + 1).0.0; \ + git tag $$NEW && echo "Tagged $$NEW" && git push origin $$NEW diff --git a/README.md b/README.md index d9f0229..c41e5fe 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,65 @@ # vault-plugin-secrets-rancher -HashiCorp Vault / OpenBao secrets engine for Rancher API tokens (seeded root rotation + dynamic scoped creds via tokens.ext.cattle.io) \ No newline at end of file +A Vault / OpenBao secrets engine that manages **Rancher API tokens** through +Rancher's public `tokens.ext.cattle.io` API. + +## Why + +Rancher caps API-token lifetimes (commonly 90 days via +`auth-token-max-ttl-minutes`). A long-lived automation token therefore expires +and breaks things. This engine solves that two ways: + +- **Seeded root rotation** — you seed a *service account* with a Rancher token. + The engine rotates it on a schedule (default: every 45 days, minting a fresh + 90-day token) using the current token to create its replacement, so the + credential never lapses. Rancher only lets you mint tokens for *your own* + user, which is exactly what rotation needs. +- **Dynamic, scoped tokens** — a *role* mints short-lived tokens on demand, each + bound to a Vault lease and deleted from Rancher on revoke. + +### Scope caveat + +Rancher tokens inherit the **creating user's RBAC**; the only per-token +restrictions are **cluster scope** (`cluster_name`) and **TTL**. For genuine +least-privilege, create a purpose-built Rancher user per privilege level, seed a +service account with each, and point roles at the right one. + +## Paths + +| Path | Description | +|------|-------------| +| `config` | Rancher URL + TLS settings. | +| `service-accounts/` | Seed a Rancher token; set `token_ttl` / `rotation_period`. Auto-rotated. | +| `service-accounts//rotate` | Force an immediate rotation. | +| `roles/` | Mint policy: `service_account`, `cluster_name`, `ttl`, `max_ttl`, `description`. | +| `creds/` | Read to mint a short-lived, lease-bound token. | + +## Usage + +```sh +vault secrets enable -path=rancher vault-plugin-secrets-rancher + +vault write rancher/config rancher_url=https://rancher.example.com ca_cert=@rancher-ca.pem + +# Seed a service account (rotate every 45d, 90d token TTL are the defaults). +vault write rancher/service-accounts/admin token="token-abcde:xxxxx" + +# A role that mints 1h tokens scoped to one cluster. +vault write rancher/roles/ci service_account=admin \ + cluster_name=c-m-abc123 ttl=1h max_ttl=8h + +# Mint one. +vault read rancher/creds/ci +``` + +## Development + +```sh +make build # build the plugin binary into ./dist +make test # unit tests +make e2e # full lifecycle vs mock Rancher on Vault + OpenBao (Docker) +make rpm # build Vault + OpenBao RPMs via nfpm +``` + +Releases are tag-driven (`make patch|minor|major`): a Woodpecker pipeline builds +the RPMs and uploads them to the internal artifactapi yum repo. diff --git a/backend.go b/backend.go new file mode 100644 index 0000000..024fd4d --- /dev/null +++ b/backend.go @@ -0,0 +1,173 @@ +// Package rancher implements a Vault / OpenBao secrets engine that manages +// Rancher API tokens through the public tokens.ext.cattle.io API. +// +// The engine is seeded with a long-lived Rancher admin (or service-account) +// token. Because Rancher caps token TTLs (commonly 90 days), the engine rotates +// each seeded token well before expiry: on a schedule it uses the current token +// to mint a fresh one for the same user and swaps it in, so the credential never +// lapses. Roles then mint short-lived, cluster-scoped tokens on demand, each +// bound to a Vault lease and deleted from Rancher on revocation. +// +// Rancher only lets a token be created for the caller's own user, so a minted +// token inherits the seeding user's RBAC. To get least-privilege tokens, seed a +// separate service-account per privilege level and point roles at it. +package rancher + +import ( + "context" + "errors" + "fmt" + "strings" + "sync" + "time" + + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" +) + +// errBackendNotConfigured is returned when a credential is requested before the +// Rancher connection has been configured. +var errBackendNotConfigured = errors.New("rancher backend not configured; write config first") + +type rancherBackend struct { + *framework.Backend + + lock sync.RWMutex +} + +// Factory returns a configured Rancher secrets backend. +func Factory(ctx context.Context, conf *logical.BackendConfig) (logical.Backend, error) { + b := backend() + if err := b.Setup(ctx, conf); err != nil { + return nil, err + } + return b, nil +} + +func backend() *rancherBackend { + b := &rancherBackend{} + + b.Backend = &framework.Backend{ + Help: strings.TrimSpace(backendHelp), + BackendType: logical.TypeLogical, + PathsSpecial: &logical.Paths{ + SealWrapStorage: []string{configStoragePath}, + }, + Paths: framework.PathAppend( + []*framework.Path{ + pathConfig(b), + pathServiceAccount(b), + pathServiceAccountsList(b), + pathServiceAccountRotate(b), + pathRole(b), + pathRolesList(b), + pathCredentials(b), + }, + ), + Secrets: []*framework.Secret{ + b.rancherTokenSecret(), + }, + // PeriodicFunc runs on the active node roughly once a minute; it drives + // the automatic root-token rotation. + PeriodicFunc: b.periodicRotate, + } + + return b +} + +// clientFor builds a Rancher client from the global config, authenticated with +// the given bearer token (a service account's current token). +func (b *rancherBackend) clientFor(ctx context.Context, s logical.Storage, bearer string) (*rancherClient, error) { + config, err := getConfig(ctx, s) + if err != nil { + return nil, err + } + if config == nil { + return nil, errBackendNotConfigured + } + return newClient(config, bearer) +} + +// periodicRotate rotates every service-account token whose age has reached its +// rotation_period. It never blocks the engine: individual failures are logged +// and retried on the next tick. +func (b *rancherBackend) periodicRotate(ctx context.Context, req *logical.Request) error { + b.lock.Lock() + defer b.lock.Unlock() + + names, err := req.Storage.List(ctx, serviceAccountStoragePrefix) + if err != nil { + return err + } + now := time.Now().UTC() + for _, name := range names { + sa, err := b.getServiceAccount(ctx, req.Storage, name) + if err != nil || sa == nil { + continue + } + if !sa.due(now) { + continue + } + if err := b.rotateServiceAccount(ctx, req.Storage, name, sa); err != nil { + b.Logger().Error("rancher: service-account rotation failed", "service_account", name, "error", err) + continue + } + b.Logger().Info("rancher: rotated service-account token", "service_account", name) + } + return nil +} + +// rotateServiceAccount mints a fresh token for the service-account user with the +// current token, persists it, then best-effort deletes the previous token. The +// caller holds b.lock. +func (b *rancherBackend) rotateServiceAccount(ctx context.Context, s logical.Storage, name string, sa *serviceAccount) error { + if sa.Token == "" { + return fmt.Errorf("service account %q has no token to rotate with", name) + } + client, err := b.clientFor(ctx, s, sa.Token) + if err != nil { + return err + } + + value, tokenName, err := client.MintToken(ctx, mintRequest{ + GenerateName: fmt.Sprintf("vault-%s-", name), + Description: fmt.Sprintf("vault-managed root token for service-account %q", name), + TTL: sa.TokenTTL, + }) + if err != nil { + return fmt.Errorf("minting replacement token: %w", err) + } + + old := sa.TokenName + sa.Token = value + sa.TokenName = tokenName + sa.LastRotated = time.Now().UTC() + if err := setJSON(ctx, s, serviceAccountStoragePrefix+name, sa); err != nil { + // The new token is live but unstored; deleting it keeps Rancher tidy and + // leaves the old token (still stored) in charge for the next tick. + _ = client.DeleteToken(ctx, tokenName) + return fmt.Errorf("persisting rotated token: %w", err) + } + + // Retire the previous token. The new token authenticates the delete. + if old != "" && old != tokenName { + newClient, cerr := b.clientFor(ctx, s, value) + if cerr == nil { + if derr := newClient.DeleteToken(ctx, old); derr != nil { + b.Logger().Warn("rancher: could not delete superseded token", "service_account", name, "token", old, "error", derr) + } + } + } + return nil +} + +const backendHelp = ` +The rancher secrets engine manages Rancher API tokens via the public +tokens.ext.cattle.io API. + +Seed a service account with a long-lived Rancher token; the engine rotates it +before Rancher's TTL cap expires so it never lapses. Roles mint short-lived, +optionally cluster-scoped tokens bound to a Vault lease and deleted on +revocation. A minted token inherits the seeding user's RBAC, so seed one service +account per privilege level for least-privilege scoping. +` diff --git a/backend_test.go b/backend_test.go new file mode 100644 index 0000000..812eef7 --- /dev/null +++ b/backend_test.go @@ -0,0 +1,211 @@ +package rancher + +import ( + "context" + "encoding/json" + "net/http" + "net/http/httptest" + "strings" + "sync" + "testing" + + "github.com/hashicorp/vault/sdk/logical" +) + +// fakeRancher is an in-memory ext.cattle.io Token API for tests. A bearer is +// valid if it is the seed token or any token this server minted, so rotation +// chains work exactly as in production. +type fakeRancher struct { + mu sync.Mutex + byName map[string]string // metadata.name -> clusterName + valid map[string]string // bearer -> metadata.name + minted int +} + +func newFakeRancher(seed string) *fakeRancher { + // "seed" is the resource name of the seed token, registered so a rotation + // that knows token_name can delete it. + return &fakeRancher{ + byName: map[string]string{"seed": ""}, + valid: map[string]string{seed: "seed"}, + } +} + +func (f *fakeRancher) server(t *testing.T) *httptest.Server { + t.Helper() + return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + bearer := strings.TrimPrefix(r.Header.Get("Authorization"), "Bearer ") + f.mu.Lock() + defer f.mu.Unlock() + if _, ok := f.valid[bearer]; !ok { + w.WriteHeader(http.StatusUnauthorized) + return + } + name := strings.Trim(strings.TrimPrefix(r.URL.Path, tokensAPIPath), "/") + switch { + case r.Method == http.MethodPost && name == "": + var in token + _ = json.NewDecoder(r.Body).Decode(&in) + f.minted++ + newName := in.Metadata.GenerateName + "abcd" + value := "token-" + newName + f.byName[newName] = in.Spec.ClusterName + f.valid[value] = newName + out := token{Metadata: tokenMetadata{Name: newName}, Status: tokenStatus{Value: value}} + w.Header().Set("Content-Type", "application/json") + w.WriteHeader(http.StatusCreated) + _ = json.NewEncoder(w).Encode(out) + case r.Method == http.MethodGet && name != "": + if _, ok := f.byName[name]; !ok { + w.WriteHeader(http.StatusNotFound) + return + } + _ = json.NewEncoder(w).Encode(token{Metadata: tokenMetadata{Name: name}}) + case r.Method == http.MethodDelete && name != "": + if _, ok := f.byName[name]; !ok { + w.WriteHeader(http.StatusNotFound) + return + } + delete(f.byName, name) + for v, n := range f.valid { + if n == name { + delete(f.valid, v) + } + } + w.WriteHeader(http.StatusOK) + default: + w.WriteHeader(http.StatusNotFound) + } + })) +} + +func newTestBackend(t *testing.T) (*rancherBackend, logical.Storage) { + t.Helper() + config := logical.TestBackendConfig() + config.StorageView = &logical.InmemStorage{} + b, err := Factory(context.Background(), config) + if err != nil { + t.Fatalf("Factory: %v", err) + } + return b.(*rancherBackend), config.StorageView +} + +func req(t *testing.T, b *rancherBackend, s logical.Storage, op logical.Operation, path string, data map[string]interface{}) *logical.Response { + t.Helper() + resp, err := b.HandleRequest(context.Background(), &logical.Request{ + Operation: op, + Path: path, + Data: data, + Storage: s, + }) + if err != nil { + t.Fatalf("%s %s: %v", op, path, err) + } + if resp != nil && resp.IsError() { + t.Fatalf("%s %s: %v", op, path, resp.Error()) + } + return resp +} + +func TestLifecycle(t *testing.T) { + fake := newFakeRancher("seed-token") + srv := fake.server(t) + defer srv.Close() + + b, s := newTestBackend(t) + + req(t, b, s, logical.CreateOperation, "config", map[string]interface{}{ + "rancher_url": srv.URL, + }) + + // Seed a service account. + req(t, b, s, logical.CreateOperation, "service-accounts/admin", map[string]interface{}{ + "token": "seed-token", + "token_name": "seed", + "token_ttl": "2160h", + "rotation_period": "1080h", + }) + + // Rotate: a new token replaces the seed and the old bearer is retired. + rot := req(t, b, s, logical.UpdateOperation, "service-accounts/admin/rotate", nil) + newName, _ := rot.Data["token_name"].(string) + if newName == "" { + t.Fatal("rotate returned no token_name") + } + fake.mu.Lock() + if _, ok := fake.valid["seed-token"]; ok { + t.Error("seed token should be retired after rotation") + } + fake.mu.Unlock() + + // Role + dynamic creds. + req(t, b, s, logical.CreateOperation, "roles/ci", map[string]interface{}{ + "service_account": "admin", + "cluster_name": "c-m-abc123", + "ttl": "1h", + "max_ttl": "24h", + }) + creds := req(t, b, s, logical.ReadOperation, "creds/ci", nil) + if creds.Secret == nil { + t.Fatal("creds returned no secret") + } + tokenName, _ := creds.Data["token_name"].(string) + if tokenName == "" || creds.Data["token"].(string) == "" { + t.Fatal("creds missing token/token_name") + } + if creds.Data["cluster_name"].(string) != "c-m-abc123" { + t.Errorf("cluster_name = %q, want c-m-abc123", creds.Data["cluster_name"]) + } + fake.mu.Lock() + if _, ok := fake.byName[tokenName]; !ok { + t.Error("minted token not present in rancher") + } + fake.mu.Unlock() + + // Revoke deletes the token from rancher. + if _, err := b.HandleRequest(context.Background(), &logical.Request{ + Operation: logical.RevokeOperation, + Secret: creds.Secret, + Storage: s, + }); err != nil { + t.Fatalf("revoke: %v", err) + } + fake.mu.Lock() + if _, ok := fake.byName[tokenName]; ok { + t.Error("token still present after revoke") + } + fake.mu.Unlock() +} + +func TestRoleRequiresServiceAccount(t *testing.T) { + b, s := newTestBackend(t) + req(t, b, s, logical.CreateOperation, "config", map[string]interface{}{"rancher_url": "https://rancher.example.com"}) + resp, err := b.HandleRequest(context.Background(), &logical.Request{ + Operation: logical.CreateOperation, + Path: "roles/x", + Data: map[string]interface{}{"service_account": "missing"}, + Storage: s, + }) + if err != nil { + t.Fatalf("unexpected err: %v", err) + } + if resp == nil || !resp.IsError() { + t.Fatal("expected error for role referencing missing service account") + } +} + +func TestServiceAccountRejectsBadRotationPeriod(t *testing.T) { + b, s := newTestBackend(t) + resp, err := b.HandleRequest(context.Background(), &logical.Request{ + Operation: logical.CreateOperation, + Path: "service-accounts/bad", + Data: map[string]interface{}{"token": "x", "token_ttl": "10h", "rotation_period": "20h"}, + Storage: s, + }) + if err != nil { + t.Fatalf("unexpected err: %v", err) + } + if resp == nil || !resp.IsError() { + t.Fatal("expected error when rotation_period >= token_ttl") + } +} diff --git a/client.go b/client.go new file mode 100644 index 0000000..c36bc74 --- /dev/null +++ b/client.go @@ -0,0 +1,205 @@ +package rancher + +import ( + "bytes" + "context" + "crypto/tls" + "crypto/x509" + "encoding/json" + "errors" + "fmt" + "io" + "net/http" + "strings" + "time" +) + +const defaultHTTPTimeout = 30 * time.Second + +// tokensAPIPath is the ext.cattle.io Token collection endpoint on the Rancher +// aggregated API server. Token is a cluster-scoped resource, so there is no +// namespace segment. +const tokensAPIPath = "/apis/ext.cattle.io/v1/tokens" + +// rancherClient talks to the Rancher aggregated Kubernetes API, specifically the +// public tokens.ext.cattle.io resource. It authenticates with a Rancher API +// token (bearer). Every token it mints belongs to the user that owns the bearer +// token — the ext API forbids creating a Token for a different spec.userID — so +// the seeded service-account user's RBAC is what a minted token inherits. +type rancherClient struct { + baseURL string + token string + httpClient *http.Client +} + +// token is the ext.cattle.io/v1 Token resource, trimmed to the fields the +// plugin reads or writes. +type token struct { + APIVersion string `json:"apiVersion,omitempty"` + Kind string `json:"kind,omitempty"` + Metadata tokenMetadata `json:"metadata,omitempty"` + Spec tokenSpec `json:"spec,omitempty"` + Status tokenStatus `json:"status,omitempty"` +} + +type tokenMetadata struct { + Name string `json:"name,omitempty"` + GenerateName string `json:"generateName,omitempty"` +} + +type tokenSpec struct { + Description string `json:"description,omitempty"` + // TTL is the token lifetime in milliseconds. Rancher clamps it to + // auth-token-max-ttl-minutes. + TTL int64 `json:"ttl,omitempty"` + // ClusterName scopes the token to a single downstream cluster. Empty means + // the token is valid against the Rancher server (full user scope). + ClusterName string `json:"clusterName,omitempty"` + Enabled *bool `json:"enabled,omitempty"` +} + +type tokenStatus struct { + // Value is the usable token string. It is returned only in the creation + // response and never again. + Value string `json:"value,omitempty"` +} + +// mintRequest describes a token to create. +type mintRequest struct { + // GenerateName is the metadata.generateName prefix; Rancher assigns a unique + // metadata.name from it. + GenerateName string + Description string + TTL time.Duration + ClusterName string +} + +func newClient(cfg *rancherConfig, bearer string) (*rancherClient, error) { + if cfg == nil { + return nil, errors.New("rancher client configuration is nil") + } + if cfg.RancherURL == "" { + return nil, errors.New("rancher_url is required") + } + + timeout := defaultHTTPTimeout + if cfg.RequestTimeoutSeconds > 0 { + timeout = time.Duration(cfg.RequestTimeoutSeconds) * time.Second + } + + tlsConfig := &tls.Config{InsecureSkipVerify: cfg.TLSSkipVerify} //nolint:gosec // opt-in via config + if cfg.CACert != "" { + pool := x509.NewCertPool() + if !pool.AppendCertsFromPEM([]byte(cfg.CACert)) { + return nil, errors.New("ca_cert is not a valid PEM certificate") + } + tlsConfig.RootCAs = pool + } + + return &rancherClient{ + baseURL: strings.TrimRight(cfg.RancherURL, "/"), + token: bearer, + httpClient: &http.Client{ + Timeout: timeout, + Transport: &http.Transport{TLSClientConfig: tlsConfig}, + }, + }, nil +} + +// MintToken creates a new ext.cattle.io Token for the bearer user and returns +// its usable value and resource name. The value is only ever available here. +func (c *rancherClient) MintToken(ctx context.Context, req mintRequest) (value, name string, err error) { + body := token{ + APIVersion: "ext.cattle.io/v1", + Kind: "Token", + Metadata: tokenMetadata{GenerateName: req.GenerateName}, + Spec: tokenSpec{ + Description: req.Description, + TTL: req.TTL.Milliseconds(), + ClusterName: req.ClusterName, + }, + } + + var out token + if err := c.do(ctx, http.MethodPost, tokensAPIPath, body, &out); err != nil { + return "", "", err + } + if out.Status.Value == "" { + return "", "", errors.New("rancher returned an empty token value") + } + return out.Status.Value, out.Metadata.Name, nil +} + +// DeleteToken removes a Token by its resource name. A missing token is success. +func (c *rancherClient) DeleteToken(ctx context.Context, name string) error { + if name == "" { + return nil + } + return c.do(ctx, http.MethodDelete, tokensAPIPath+"/"+name, nil, nil) +} + +// GetToken reads a Token by resource name (used to verify existence in tests / +// health checks). Returns nil if the token does not exist. +func (c *rancherClient) GetToken(ctx context.Context, name string) (*token, error) { + var out token + err := c.do(ctx, http.MethodGet, tokensAPIPath+"/"+name, nil, &out) + if err != nil { + if errors.Is(err, errNotFound) { + return nil, nil + } + return nil, err + } + return &out, nil +} + +// errNotFound flags a 404 so callers can treat absence as non-fatal. +var errNotFound = errors.New("not found") + +func (c *rancherClient) do(ctx context.Context, method, path string, payload, out interface{}) error { + var body io.Reader + if payload != nil { + raw, err := json.Marshal(payload) + if err != nil { + return fmt.Errorf("encoding request body: %w", err) + } + body = bytes.NewReader(raw) + } + + req, err := http.NewRequestWithContext(ctx, method, c.baseURL+path, body) + if err != nil { + return fmt.Errorf("building request: %w", err) + } + if c.token != "" { + req.Header.Set("Authorization", "Bearer "+c.token) + } + req.Header.Set("Accept", "application/json") + if body != nil { + req.Header.Set("Content-Type", "application/json") + } + + resp, err := c.httpClient.Do(req) + if err != nil { + return fmt.Errorf("calling rancher %s %s: %w", method, path, err) + } + defer resp.Body.Close() + + respBody, _ := io.ReadAll(io.LimitReader(resp.Body, 1<<20)) + + if resp.StatusCode == http.StatusNotFound { + if method == http.MethodDelete { + return nil + } + return errNotFound + } + if resp.StatusCode < 200 || resp.StatusCode >= 300 { + return fmt.Errorf("rancher %s %s returned %d: %s", method, path, resp.StatusCode, strings.TrimSpace(string(respBody))) + } + + if out == nil { + return nil + } + if err := json.Unmarshal(respBody, out); err != nil { + return fmt.Errorf("decoding rancher response: %w", err) + } + return nil +} diff --git a/cmd/vault-plugin-secrets-rancher/main.go b/cmd/vault-plugin-secrets-rancher/main.go new file mode 100644 index 0000000..01a4409 --- /dev/null +++ b/cmd/vault-plugin-secrets-rancher/main.go @@ -0,0 +1,34 @@ +package main + +import ( + "os" + + hclog "github.com/hashicorp/go-hclog" + "github.com/hashicorp/vault/api" + "github.com/hashicorp/vault/sdk/plugin" + + rancher "git.unkin.net/unkin/vault-plugin-secrets-rancher" +) + +func main() { + apiClientMeta := &api.PluginAPIClientMeta{} + flags := apiClientMeta.FlagSet() + if err := flags.Parse(os.Args[1:]); err != nil { + logger := hclog.New(&hclog.LoggerOptions{}) + logger.Error("failed to parse flags", "error", err) + os.Exit(1) + } + + tlsConfig := apiClientMeta.GetTLSConfig() + tlsProviderFunc := api.VaultPluginTLSProvider(tlsConfig) + + err := plugin.ServeMultiplex(&plugin.ServeOpts{ + BackendFactoryFunc: rancher.Factory, + TLSProviderFunc: tlsProviderFunc, + }) + if err != nil { + logger := hclog.New(&hclog.LoggerOptions{}) + logger.Error("plugin shutting down", "error", err) + os.Exit(1) + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..f716c4c --- /dev/null +++ b/go.mod @@ -0,0 +1,90 @@ +module git.unkin.net/unkin/vault-plugin-secrets-rancher + +go 1.25.0 + +require ( + github.com/hashicorp/go-hclog v1.6.3 + github.com/hashicorp/go-uuid v1.0.3 + github.com/hashicorp/vault/api v1.15.0 + github.com/hashicorp/vault/sdk v0.14.0 +) + +require ( + github.com/Microsoft/go-winio v0.6.1 // indirect + github.com/armon/go-metrics v0.4.1 // indirect + github.com/armon/go-radix v1.0.0 // indirect + github.com/cenkalti/backoff/v4 v4.3.0 // indirect + github.com/cespare/xxhash/v2 v2.3.0 // indirect + github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect + github.com/distribution/reference v0.6.0 // indirect + github.com/docker/docker v26.1.5+incompatible // indirect + github.com/docker/go-connections v0.4.0 // indirect + github.com/docker/go-units v0.5.0 // indirect + github.com/evanphx/json-patch/v5 v5.6.0 // indirect + github.com/fatih/color v1.16.0 // indirect + github.com/felixge/httpsnoop v1.0.4 // indirect + github.com/go-jose/go-jose/v4 v4.1.3 // indirect + github.com/go-logr/logr v1.4.3 // indirect + github.com/go-logr/stdr v1.2.2 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.4 // indirect + github.com/golang/snappy v0.0.4 // indirect + github.com/hashicorp/errwrap v1.1.0 // indirect + github.com/hashicorp/go-cleanhttp v0.5.2 // indirect + github.com/hashicorp/go-immutable-radix v1.3.1 // indirect + github.com/hashicorp/go-kms-wrapping/entropy/v2 v2.0.0 // indirect + github.com/hashicorp/go-kms-wrapping/v2 v2.0.8 // indirect + github.com/hashicorp/go-multierror v1.1.1 // indirect + github.com/hashicorp/go-plugin v1.6.1 // indirect + github.com/hashicorp/go-retryablehttp v0.7.7 // indirect + github.com/hashicorp/go-rootcerts v1.0.2 // indirect + github.com/hashicorp/go-secure-stdlib/mlock v0.1.2 // indirect + github.com/hashicorp/go-secure-stdlib/parseutil v0.1.8 // indirect + github.com/hashicorp/go-secure-stdlib/plugincontainer v0.4.0 // indirect + github.com/hashicorp/go-secure-stdlib/strutil v0.1.2 // indirect + github.com/hashicorp/go-sockaddr v1.0.6 // indirect + github.com/hashicorp/go-version v1.6.0 // indirect + github.com/hashicorp/golang-lru v0.5.4 // indirect + github.com/hashicorp/hcl v1.0.1-vault-5 // indirect + github.com/hashicorp/yamux v0.1.1 // indirect + github.com/joshlf/go-acl v0.0.0-20200411065538-eae00ae38531 // indirect + github.com/mattn/go-colorable v0.1.13 // indirect + github.com/mattn/go-isatty v0.0.20 // indirect + github.com/mitchellh/copystructure v1.2.0 // indirect + github.com/mitchellh/go-homedir v1.1.0 // indirect + github.com/mitchellh/go-testing-interface v1.14.1 // indirect + github.com/mitchellh/mapstructure v1.5.0 // indirect + github.com/mitchellh/reflectwalk v1.0.2 // indirect + github.com/moby/docker-image-spec v1.3.1 // indirect + github.com/oklog/run v1.1.0 // indirect + github.com/opencontainers/go-digest v1.0.0 // indirect + github.com/opencontainers/image-spec v1.1.0-rc2.0.20221005185240-3a7f492d3f1b // indirect + github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 // indirect + github.com/pierrec/lz4 v2.6.1+incompatible // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect + github.com/ryanuber/go-glob v1.0.0 // indirect + github.com/sasha-s/go-deadlock v0.2.0 // indirect + github.com/stretchr/testify v1.11.1 // indirect + go.opentelemetry.io/auto/sdk v1.2.1 // indirect + go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.51.0 // indirect + go.opentelemetry.io/otel v1.44.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.44.0 // indirect + go.opentelemetry.io/otel/metric v1.44.0 // indirect + go.opentelemetry.io/otel/sdk/metric v1.44.0 // indirect + go.opentelemetry.io/otel/trace v1.44.0 // indirect + go.opentelemetry.io/proto/otlp v1.10.0 // indirect + go.uber.org/atomic v1.9.0 // indirect + golang.org/x/crypto v0.48.0 // indirect + golang.org/x/mod v0.32.0 // indirect + golang.org/x/net v0.50.0 // indirect + golang.org/x/sync v0.19.0 // indirect + golang.org/x/sys v0.45.0 // indirect + golang.org/x/text v0.34.0 // indirect + golang.org/x/time v0.5.0 // indirect + golang.org/x/tools v0.41.0 // indirect + google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect + google.golang.org/grpc v1.79.2 // indirect + google.golang.org/protobuf v1.36.11 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..60854d0 --- /dev/null +++ b/go.sum @@ -0,0 +1,340 @@ +github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8= +github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E= +github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ= +github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow= +github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/armon/go-metrics v0.4.1 h1:hR91U9KYmb6bLBYLQjyM+3j+rcd/UhE+G78SFnF8gJA= +github.com/armon/go-metrics v0.4.1/go.mod h1:E6amYzXo6aW1tqzoZGT755KkbgrJsSdpwZ+3JqfkOG4= +github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI= +github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8= +github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q= +github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8= +github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= +github.com/bufbuild/protocompile v0.4.0 h1:LbFKd2XowZvQ/kajzguUp2DC9UEIQhIq77fZZlaQsNA= +github.com/bufbuild/protocompile v0.4.0/go.mod h1:3v93+mbWn/v3xzN+31nwkJfrEpAUwp+BagBSZWx+TP8= +github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8= +github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE= +github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= +github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs= +github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= +github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag= +github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I= +github.com/containerd/log v0.1.0 h1:TCJt7ioM2cr/tfR8GPbGf9/VRAX8D2B4PjzCpfX540I= +github.com/containerd/log v0.1.0/go.mod h1:VRRf09a7mHDIRezVKTRCrOq78v577GXq3bSa3EhrzVo= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM= +github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/distribution/reference v0.6.0 h1:0IXCQ5g4/QMHHkarYzh5l+u8T3t73zM5QvfrDyIgxBk= +github.com/distribution/reference v0.6.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E= +github.com/docker/docker v26.1.5+incompatible h1:NEAxTwEjxV6VbBMBoGG3zPqbiJosIApZjxlbrG9q3/g= +github.com/docker/docker v26.1.5+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk= +github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ= +github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec= +github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4= +github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk= +github.com/evanphx/json-patch/v5 v5.6.0 h1:b91NhWfaz02IuVxO9faSllyAtNXHMPkC5J8sJCLunww= +github.com/evanphx/json-patch/v5 v5.6.0/go.mod h1:G79N1coSVB93tBe7j6PhzjmR3/2VvlbKOFpnXhI9Bw4= +github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk= +github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM= +github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE= 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Rendered through +# envsubst (see scripts/build-rpm.sh) then fed to `nfpm pkg`. Built once per +# target server (Vault, OpenBao); PACKAGE_NAME and PACKAGE_PLUGIN_DIR vary. + +name: ${PACKAGE_NAME} +version: ${PACKAGE_VERSION} +release: ${PACKAGE_RELEASE} +arch: ${PACKAGE_ARCH} +platform: ${PACKAGE_PLATFORM} +section: default +priority: extra +description: "${PACKAGE_DESCRIPTION}" + +maintainer: ${PACKAGE_MAINTAINER} +homepage: ${PACKAGE_HOMEPAGE} +license: ${PACKAGE_LICENSE} + +disable_globbing: false + +replaces: + - ${PACKAGE_NAME} +provides: + - ${PACKAGE_NAME} + +contents: + - src: dist/vault-plugin-secrets-rancher + dst: ${PACKAGE_PLUGIN_DIR}/vault-plugin-secrets-rancher + file_info: + mode: 0755 + owner: root + group: root + +scripts: + preinstall: ${PACKAGE_PREINSTALL} diff --git a/packaging/scripts/preinstall.sh.tmpl b/packaging/scripts/preinstall.sh.tmpl new file mode 100755 index 0000000..e129bf4 --- /dev/null +++ b/packaging/scripts/preinstall.sh.tmpl @@ -0,0 +1,4 @@ +#!/usr/bin/env bash +# Ensure the plugin directory exists before the binary is laid down. +# Rendered per flavour via envsubst (see scripts/build-rpm.sh). +mkdir -p ${PACKAGE_PLUGIN_DIR} diff --git a/path_config.go b/path_config.go new file mode 100644 index 0000000..a92ecf9 --- /dev/null +++ b/path_config.go @@ -0,0 +1,147 @@ +package rancher + +import ( + "context" + "errors" + + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" +) + +const configStoragePath = "config" + +// rancherConfig is the connection to the Rancher server. Per-user tokens live on +// service-account entries, not here — this is only how to reach Rancher. +type rancherConfig struct { + RancherURL string `json:"rancher_url"` + CACert string `json:"ca_cert"` + TLSSkipVerify bool `json:"tls_skip_verify"` + RequestTimeoutSeconds int `json:"request_timeout_seconds"` +} + +func pathConfig(b *rancherBackend) *framework.Path { + return &framework.Path{ + Pattern: "config", + DisplayAttrs: &framework.DisplayAttributes{ + OperationPrefix: "rancher", + OperationSuffix: "config", + }, + Fields: map[string]*framework.FieldSchema{ + "rancher_url": { + Type: framework.TypeString, + Description: "Base URL of the Rancher server, e.g. https://rancher.example.com.", + Required: true, + }, + "ca_cert": { + Type: framework.TypeString, + Description: "PEM CA certificate that signed the Rancher server's TLS certificate.", + }, + "tls_skip_verify": { + Type: framework.TypeBool, + Description: "Skip TLS verification of the Rancher server (not recommended).", + Default: false, + }, + "request_timeout_seconds": { + Type: framework.TypeInt, + Description: "HTTP timeout in seconds for calls to Rancher (default 30).", + Default: 30, + }, + }, + Operations: map[logical.Operation]framework.OperationHandler{ + logical.ReadOperation: &framework.PathOperation{Callback: b.pathConfigRead}, + logical.CreateOperation: &framework.PathOperation{Callback: b.pathConfigWrite}, + logical.UpdateOperation: &framework.PathOperation{Callback: b.pathConfigWrite}, + logical.DeleteOperation: &framework.PathOperation{Callback: b.pathConfigDelete}, + }, + ExistenceCheck: b.pathConfigExistenceCheck, + HelpSynopsis: "Configure the connection to the Rancher server.", + HelpDescription: "Configure the URL and TLS settings the backend uses to reach Rancher. Per-user tokens are configured on service-accounts/.", + } +} + +func (b *rancherBackend) pathConfigExistenceCheck(ctx context.Context, req *logical.Request, _ *framework.FieldData) (bool, error) { + config, err := getConfig(ctx, req.Storage) + if err != nil { + return false, err + } + return config != nil, nil +} + +func (b *rancherBackend) pathConfigRead(ctx context.Context, req *logical.Request, _ *framework.FieldData) (*logical.Response, error) { + config, err := getConfig(ctx, req.Storage) + if err != nil { + return nil, err + } + if config == nil { + return nil, nil + } + return &logical.Response{ + Data: map[string]interface{}{ + "rancher_url": config.RancherURL, + "tls_skip_verify": config.TLSSkipVerify, + "request_timeout_seconds": config.RequestTimeoutSeconds, + }, + }, nil +} + +func (b *rancherBackend) pathConfigWrite(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + config, err := getConfig(ctx, req.Storage) + if err != nil { + return nil, err + } + if config == nil { + if req.Operation == logical.UpdateOperation { + return nil, errors.New("config not found during update operation") + } + config = &rancherConfig{} + } + + if v, ok := data.GetOk("rancher_url"); ok { + config.RancherURL = v.(string) + } + if v, ok := data.GetOk("ca_cert"); ok { + config.CACert = v.(string) + } + if v, ok := data.GetOk("tls_skip_verify"); ok { + config.TLSSkipVerify = v.(bool) + } + if v, ok := data.GetOk("request_timeout_seconds"); ok { + config.RequestTimeoutSeconds = v.(int) + } else if req.Operation == logical.CreateOperation { + config.RequestTimeoutSeconds = data.Get("request_timeout_seconds").(int) + } + + if config.RancherURL == "" { + return logical.ErrorResponse("rancher_url is required"), nil + } + + return nil, setJSON(ctx, req.Storage, configStoragePath, config) +} + +func (b *rancherBackend) pathConfigDelete(ctx context.Context, req *logical.Request, _ *framework.FieldData) (*logical.Response, error) { + return nil, req.Storage.Delete(ctx, configStoragePath) +} + +func getConfig(ctx context.Context, s logical.Storage) (*rancherConfig, error) { + entry, err := s.Get(ctx, configStoragePath) + if err != nil { + return nil, err + } + if entry == nil { + return nil, nil + } + config := &rancherConfig{} + if err := entry.DecodeJSON(config); err != nil { + return nil, err + } + return config, nil +} + +// setJSON stores a value as a JSON storage entry. +func setJSON(ctx context.Context, s logical.Storage, key string, value interface{}) error { + entry, err := logical.StorageEntryJSON(key, value) + if err != nil { + return err + } + return s.Put(ctx, entry) +} diff --git a/path_creds.go b/path_creds.go new file mode 100644 index 0000000..f4e87ae --- /dev/null +++ b/path_creds.go @@ -0,0 +1,113 @@ +package rancher + +import ( + "context" + "fmt" + "time" + + "github.com/hashicorp/go-uuid" + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" +) + +func pathCredentials(b *rancherBackend) *framework.Path { + return &framework.Path{ + Pattern: "creds/" + framework.GenericNameRegex("name"), + DisplayAttrs: &framework.DisplayAttributes{ + OperationPrefix: "rancher", + OperationSuffix: "credentials", + }, + Fields: map[string]*framework.FieldSchema{ + "name": { + Type: framework.TypeLowerCaseString, + Description: "Name of the role to mint a token for.", + Required: true, + }, + }, + Operations: map[logical.Operation]framework.OperationHandler{ + logical.ReadOperation: &framework.PathOperation{Callback: b.pathCredentialsRead}, + logical.UpdateOperation: &framework.PathOperation{Callback: b.pathCredentialsRead}, + }, + HelpSynopsis: "Mint a short-lived Rancher token from a role.", + HelpDescription: "Reading this path mints a new, lease-bound Rancher API token via the role's service account; the token is deleted from Rancher when the lease is revoked.", + } +} + +func (b *rancherBackend) pathCredentialsRead(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + roleName := data.Get("name").(string) + role, err := b.getRole(ctx, req.Storage, roleName) + if err != nil { + return nil, err + } + if role == nil { + return logical.ErrorResponse("role %q does not exist", roleName), nil + } + + sa, err := b.getServiceAccount(ctx, req.Storage, role.ServiceAccount) + if err != nil { + return nil, err + } + if sa == nil { + return logical.ErrorResponse("service account %q referenced by role %q does not exist", role.ServiceAccount, roleName), nil + } + + client, err := b.clientFor(ctx, req.Storage, sa.Token) + if err != nil { + return nil, err + } + + ttl, maxTTL := b.resolveTTLs(role.TTL, role.MaxTTL) + + suffix, err := uuid.GenerateUUID() + if err != nil { + return nil, fmt.Errorf("generating token name suffix: %w", err) + } + + description := role.Description + if description == "" { + description = fmt.Sprintf("vault dynamic token (role %q)", roleName) + } + + value, tokenName, err := client.MintToken(ctx, mintRequest{ + GenerateName: fmt.Sprintf("vault-%s-%s-", roleName, suffix[:8]), + Description: description, + TTL: ttl, + ClusterName: role.ClusterName, + }) + if err != nil { + return nil, fmt.Errorf("minting rancher token: %w", err) + } + + internal := map[string]interface{}{ + "token_name": tokenName, + "service_account": role.ServiceAccount, + } + external := map[string]interface{}{ + "token": value, + "token_name": tokenName, + "cluster_name": role.ClusterName, + } + + resp := b.Secret(rancherTokenType).Response(external, internal) + resp.Secret.TTL = ttl + resp.Secret.MaxTTL = maxTTL + resp.Secret.Renewable = true + return resp, nil +} + +// resolveTTLs clamps a role's TTL/MaxTTL against the mount and system limits. +func (b *rancherBackend) resolveTTLs(roleTTL, roleMaxTTL time.Duration) (ttl, maxTTL time.Duration) { + sysMaxTTL := b.System().MaxLeaseTTL() + maxTTL = roleMaxTTL + if maxTTL <= 0 || maxTTL > sysMaxTTL { + maxTTL = sysMaxTTL + } + ttl = roleTTL + if ttl <= 0 { + ttl = b.System().DefaultLeaseTTL() + } + if ttl > maxTTL { + ttl = maxTTL + } + return ttl, maxTTL +} diff --git a/path_roles.go b/path_roles.go new file mode 100644 index 0000000..6927560 --- /dev/null +++ b/path_roles.go @@ -0,0 +1,190 @@ +package rancher + +import ( + "context" + "errors" + "time" + + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" +) + +const roleStoragePrefix = "role/" + +// rancherRole mints short-lived Rancher tokens from a service account. Each read +// of creds/ produces a unique, lease-bound token. +type rancherRole struct { + // ServiceAccount is the seeded service account whose token mints the creds, + // and whose RBAC the minted token inherits. + ServiceAccount string `json:"service_account"` + // ClusterName scopes minted tokens to a single downstream cluster (empty = + // full Rancher-server scope). + ClusterName string `json:"cluster_name"` + // Description is applied to each minted token (helps auditing in Rancher). + Description string `json:"description"` + TTL time.Duration `json:"ttl"` + MaxTTL time.Duration `json:"max_ttl"` +} + +func pathRole(b *rancherBackend) *framework.Path { + return &framework.Path{ + Pattern: "roles/" + framework.GenericNameRegex("name"), + DisplayAttrs: &framework.DisplayAttributes{ + OperationPrefix: "rancher", + OperationSuffix: "role", + }, + Fields: map[string]*framework.FieldSchema{ + "name": { + Type: framework.TypeLowerCaseString, + Description: "Name of the role.", + Required: true, + }, + "service_account": { + Type: framework.TypeString, + Description: "Service account (seeded token) used to mint credentials for this role. Its user's RBAC is inherited by minted tokens.", + Required: true, + }, + "cluster_name": { + Type: framework.TypeString, + Description: "Downstream cluster the minted tokens are scoped to (empty = full Rancher-server scope).", + }, + "description": { + Type: framework.TypeString, + Description: "Description applied to each minted Rancher token.", + }, + "ttl": { + Type: framework.TypeDurationSecond, + Description: "Default lease TTL for tokens minted from this role.", + }, + "max_ttl": { + Type: framework.TypeDurationSecond, + Description: "Maximum lease TTL for tokens minted from this role.", + }, + }, + Operations: map[logical.Operation]framework.OperationHandler{ + logical.ReadOperation: &framework.PathOperation{Callback: b.pathRoleRead}, + logical.CreateOperation: &framework.PathOperation{Callback: b.pathRoleWrite}, + logical.UpdateOperation: &framework.PathOperation{Callback: b.pathRoleWrite}, + logical.DeleteOperation: &framework.PathOperation{Callback: b.pathRoleDelete}, + }, + ExistenceCheck: b.pathRoleExistenceCheck, + HelpSynopsis: "Manage roles that mint short-lived Rancher tokens.", + HelpDescription: "Each read of creds/ mints a unique, lease-bound Rancher token via the role's service account.", + } +} + +func pathRolesList(b *rancherBackend) *framework.Path { + return &framework.Path{ + Pattern: "roles/?$", + DisplayAttrs: &framework.DisplayAttributes{ + OperationPrefix: "rancher", + OperationSuffix: "roles", + }, + Operations: map[logical.Operation]framework.OperationHandler{ + logical.ListOperation: &framework.PathOperation{Callback: b.pathRolesList}, + }, + HelpSynopsis: "List roles.", + HelpDescription: "List the token-minting roles configured on this backend.", + } +} + +func (b *rancherBackend) pathRoleExistenceCheck(ctx context.Context, req *logical.Request, data *framework.FieldData) (bool, error) { + role, err := b.getRole(ctx, req.Storage, data.Get("name").(string)) + if err != nil { + return false, err + } + return role != nil, nil +} + +func (b *rancherBackend) pathRoleRead(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + role, err := b.getRole(ctx, req.Storage, data.Get("name").(string)) + if err != nil { + return nil, err + } + if role == nil { + return nil, nil + } + return &logical.Response{ + Data: map[string]interface{}{ + "service_account": role.ServiceAccount, + "cluster_name": role.ClusterName, + "description": role.Description, + "ttl": int64(role.TTL.Seconds()), + "max_ttl": int64(role.MaxTTL.Seconds()), + }, + }, nil +} + +func (b *rancherBackend) pathRoleWrite(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + name := data.Get("name").(string) + role, err := b.getRole(ctx, req.Storage, name) + if err != nil { + return nil, err + } + if role == nil { + role = &rancherRole{} + } + + if v, ok := data.GetOk("service_account"); ok { + role.ServiceAccount = v.(string) + } + if v, ok := data.GetOk("cluster_name"); ok { + role.ClusterName = v.(string) + } + if v, ok := data.GetOk("description"); ok { + role.Description = v.(string) + } + if v, ok := data.GetOk("ttl"); ok { + role.TTL = time.Duration(v.(int)) * time.Second + } + if v, ok := data.GetOk("max_ttl"); ok { + role.MaxTTL = time.Duration(v.(int)) * time.Second + } + + if role.ServiceAccount == "" { + return logical.ErrorResponse("service_account is required"), nil + } + if role.MaxTTL > 0 && role.TTL > role.MaxTTL { + return logical.ErrorResponse("ttl must not exceed max_ttl"), nil + } + // Fail fast if the referenced service account does not exist. + sa, err := b.getServiceAccount(ctx, req.Storage, role.ServiceAccount) + if err != nil { + return nil, err + } + if sa == nil { + return logical.ErrorResponse("service_account %q does not exist", role.ServiceAccount), nil + } + + return nil, setJSON(ctx, req.Storage, roleStoragePrefix+name, role) +} + +func (b *rancherBackend) pathRoleDelete(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + return nil, req.Storage.Delete(ctx, roleStoragePrefix+data.Get("name").(string)) +} + +func (b *rancherBackend) pathRolesList(ctx context.Context, req *logical.Request, _ *framework.FieldData) (*logical.Response, error) { + entries, err := req.Storage.List(ctx, roleStoragePrefix) + if err != nil { + return nil, err + } + return logical.ListResponse(entries), nil +} + +func (b *rancherBackend) getRole(ctx context.Context, s logical.Storage, name string) (*rancherRole, error) { + if name == "" { + return nil, errors.New("missing role name") + } + entry, err := s.Get(ctx, roleStoragePrefix+name) + if err != nil { + return nil, err + } + if entry == nil { + return nil, nil + } + role := &rancherRole{} + if err := entry.DecodeJSON(role); err != nil { + return nil, err + } + return role, nil +} diff --git a/path_service_accounts.go b/path_service_accounts.go new file mode 100644 index 0000000..4a734ac --- /dev/null +++ b/path_service_accounts.go @@ -0,0 +1,254 @@ +package rancher + +import ( + "context" + "errors" + "fmt" + "time" + + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" +) + +const serviceAccountStoragePrefix = "service-account/" + +// defaults for the seeded-token rotation schedule. +const ( + defaultTokenTTL = 90 * 24 * time.Hour // Rancher's common auth-token-max-ttl. + defaultRotationPeriod = 45 * 24 * time.Hour // rotate at half-life, well before expiry. +) + +// serviceAccount is a seeded Rancher user token that the engine keeps rotated. +// Roles reference a service account and mint short-lived tokens with its token, +// so minted tokens inherit that user's RBAC. +type serviceAccount struct { + // Token is the current live Rancher token. Write-only from the API. + Token string `json:"token"` + // TokenName is the ext.cattle.io Token resource name, so the superseded + // token can be deleted after a rotation. + TokenName string `json:"token_name"` + // TokenTTL is the lifetime requested for each rotated replacement token. + TokenTTL time.Duration `json:"token_ttl"` + // RotationPeriod is how long a token is used before it is rotated. Keep it + // comfortably below TokenTTL so rotation always beats expiry. + RotationPeriod time.Duration `json:"rotation_period"` + // LastRotated is when the current token was issued (or seeded). + LastRotated time.Time `json:"last_rotated"` +} + +// due reports whether the token is old enough to rotate. +func (s *serviceAccount) due(now time.Time) bool { + if s.RotationPeriod <= 0 { + return false + } + return now.Sub(s.LastRotated) >= s.RotationPeriod +} + +func pathServiceAccount(b *rancherBackend) *framework.Path { + return &framework.Path{ + Pattern: "service-accounts/" + framework.GenericNameRegex("name"), + DisplayAttrs: &framework.DisplayAttributes{ + OperationPrefix: "rancher", + OperationSuffix: "service-account", + }, + Fields: map[string]*framework.FieldSchema{ + "name": { + Type: framework.TypeLowerCaseString, + Description: "Name of the service account (a seeded, auto-rotated Rancher token).", + Required: true, + }, + "token": { + Type: framework.TypeString, + Description: "Rancher API token to seed this service account with. Write-only; the engine rotates it from here on.", + DisplayAttrs: &framework.DisplayAttributes{ + Name: "Seed Token", + Sensitive: true, + }, + }, + "token_name": { + Type: framework.TypeString, + Description: "ext.cattle.io Token resource name (metadata.name) of the seed token, so the engine can delete it after the first rotation. Optional but recommended.", + }, + "token_ttl": { + Type: framework.TypeDurationSecond, + Description: "Lifetime requested for each rotated replacement token (default 90d). Must not exceed Rancher's auth-token-max-ttl-minutes.", + Default: int(defaultTokenTTL.Seconds()), + }, + "rotation_period": { + Type: framework.TypeDurationSecond, + Description: "How long a token is used before it is rotated (default 45d). Keep it below token_ttl.", + Default: int(defaultRotationPeriod.Seconds()), + }, + }, + Operations: map[logical.Operation]framework.OperationHandler{ + logical.ReadOperation: &framework.PathOperation{Callback: b.pathServiceAccountRead}, + logical.CreateOperation: &framework.PathOperation{Callback: b.pathServiceAccountWrite}, + logical.UpdateOperation: &framework.PathOperation{Callback: b.pathServiceAccountWrite}, + logical.DeleteOperation: &framework.PathOperation{Callback: b.pathServiceAccountDelete}, + }, + ExistenceCheck: b.pathServiceAccountExistenceCheck, + HelpSynopsis: "Manage seeded, auto-rotated Rancher service-account tokens.", + HelpDescription: "Each service account holds a Rancher token the engine rotates before Rancher's TTL cap. Roles reference a service account to mint short-lived tokens with its RBAC.", + } +} + +func pathServiceAccountsList(b *rancherBackend) *framework.Path { + return &framework.Path{ + Pattern: "service-accounts/?$", + DisplayAttrs: &framework.DisplayAttributes{ + OperationPrefix: "rancher", + OperationSuffix: "service-accounts", + }, + Operations: map[logical.Operation]framework.OperationHandler{ + logical.ListOperation: &framework.PathOperation{Callback: b.pathServiceAccountsList}, + }, + HelpSynopsis: "List service accounts.", + HelpDescription: "List the seeded Rancher service accounts configured on this backend.", + } +} + +func pathServiceAccountRotate(b *rancherBackend) *framework.Path { + return &framework.Path{ + Pattern: "service-accounts/" + framework.GenericNameRegex("name") + "/rotate$", + DisplayAttrs: &framework.DisplayAttributes{ + OperationPrefix: "rancher", + OperationSuffix: "service-account-rotate", + }, + Fields: map[string]*framework.FieldSchema{ + "name": { + Type: framework.TypeLowerCaseString, + Description: "Name of the service account to rotate now.", + Required: true, + }, + }, + Operations: map[logical.Operation]framework.OperationHandler{ + logical.UpdateOperation: &framework.PathOperation{Callback: b.pathServiceAccountRotateNow}, + }, + HelpSynopsis: "Rotate a service-account token immediately.", + HelpDescription: "Forces an out-of-schedule rotation: mints a fresh token with the current one, stores it, and deletes the old token.", + } +} + +func (b *rancherBackend) pathServiceAccountExistenceCheck(ctx context.Context, req *logical.Request, data *framework.FieldData) (bool, error) { + sa, err := b.getServiceAccount(ctx, req.Storage, data.Get("name").(string)) + if err != nil { + return false, err + } + return sa != nil, nil +} + +func (b *rancherBackend) pathServiceAccountRead(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + sa, err := b.getServiceAccount(ctx, req.Storage, data.Get("name").(string)) + if err != nil { + return nil, err + } + if sa == nil { + return nil, nil + } + // The token itself is never returned. + return &logical.Response{ + Data: map[string]interface{}{ + "token_name": sa.TokenName, + "token_ttl": int64(sa.TokenTTL.Seconds()), + "rotation_period": int64(sa.RotationPeriod.Seconds()), + "last_rotated": sa.LastRotated.Format(time.RFC3339), + }, + }, nil +} + +func (b *rancherBackend) pathServiceAccountWrite(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + name := data.Get("name").(string) + sa, err := b.getServiceAccount(ctx, req.Storage, name) + if err != nil { + return nil, err + } + isCreate := sa == nil + if isCreate { + sa = &serviceAccount{} + } + + if v, ok := data.GetOk("token"); ok { + sa.Token = v.(string) + // A freshly seeded token restarts the rotation clock. + sa.LastRotated = time.Now().UTC() + } + if v, ok := data.GetOk("token_name"); ok { + sa.TokenName = v.(string) + } + if v, ok := data.GetOk("token_ttl"); ok { + sa.TokenTTL = time.Duration(v.(int)) * time.Second + } else if isCreate { + sa.TokenTTL = defaultTokenTTL + } + if v, ok := data.GetOk("rotation_period"); ok { + sa.RotationPeriod = time.Duration(v.(int)) * time.Second + } else if isCreate { + sa.RotationPeriod = defaultRotationPeriod + } + + if sa.Token == "" { + return logical.ErrorResponse("token is required to seed a service account"), nil + } + if sa.RotationPeriod > 0 && sa.TokenTTL > 0 && sa.RotationPeriod >= sa.TokenTTL { + return logical.ErrorResponse("rotation_period must be less than token_ttl so rotation beats expiry"), nil + } + if sa.LastRotated.IsZero() { + sa.LastRotated = time.Now().UTC() + } + + return nil, setJSON(ctx, req.Storage, serviceAccountStoragePrefix+name, sa) +} + +func (b *rancherBackend) pathServiceAccountDelete(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + return nil, req.Storage.Delete(ctx, serviceAccountStoragePrefix+data.Get("name").(string)) +} + +func (b *rancherBackend) pathServiceAccountsList(ctx context.Context, req *logical.Request, _ *framework.FieldData) (*logical.Response, error) { + entries, err := req.Storage.List(ctx, serviceAccountStoragePrefix) + if err != nil { + return nil, err + } + return logical.ListResponse(entries), nil +} + +func (b *rancherBackend) pathServiceAccountRotateNow(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { + name := data.Get("name").(string) + + b.lock.Lock() + defer b.lock.Unlock() + + sa, err := b.getServiceAccount(ctx, req.Storage, name) + if err != nil { + return nil, err + } + if sa == nil { + return logical.ErrorResponse("service account %q does not exist", name), nil + } + if err := b.rotateServiceAccount(ctx, req.Storage, name, sa); err != nil { + return nil, fmt.Errorf("rotating service account %q: %w", name, err) + } + return &logical.Response{ + Data: map[string]interface{}{ + "token_name": sa.TokenName, + "last_rotated": sa.LastRotated.Format(time.RFC3339), + }, + }, nil +} + +func (b *rancherBackend) getServiceAccount(ctx context.Context, s logical.Storage, name string) (*serviceAccount, error) { + if name == "" { + return nil, errors.New("missing service account name") + } + entry, err := s.Get(ctx, serviceAccountStoragePrefix+name) + if err != nil { + return nil, err + } + if entry == nil { + return nil, nil + } + sa := &serviceAccount{} + if err := entry.DecodeJSON(sa); err != nil { + return nil, err + } + return sa, nil +} diff --git a/scripts/build-rpm.sh b/scripts/build-rpm.sh new file mode 100755 index 0000000..2a9f167 --- /dev/null +++ b/scripts/build-rpm.sh @@ -0,0 +1,44 @@ +#!/usr/bin/env bash +# +# Package the (already built) plugin binary into RPMs with nfpm. Builds one RPM +# per target server: Vault (/opt/vault-plugins) and OpenBao (/opt/openbao-plugins). +# Usage: scripts/build-rpm.sh [version] (version defaults to $CI_COMMIT_TAG) +# +set -euo pipefail + +ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)" +cd "${ROOT_DIR}" + +VERSION="${1:-${CI_COMMIT_TAG:-0.0.0-dev}}" +VERSION="${VERSION#v}" +BINARY="vault-plugin-secrets-rancher" +DIST="dist" + +if [ ! -f "${DIST}/${BINARY}" ]; then + echo "ERROR: ${DIST}/${BINARY} not found; run 'make build' first" >&2 + exit 1 +fi + +export PACKAGE_VERSION="${VERSION}" +export PACKAGE_RELEASE="1" +export PACKAGE_ARCH="amd64" +export PACKAGE_PLATFORM="linux" +export PACKAGE_DESCRIPTION="Vault/OpenBao secrets engine for Rancher API tokens (tokens.ext.cattle.io)" +export PACKAGE_MAINTAINER="Ben Vincent " +export PACKAGE_HOMEPAGE="https://git.unkin.net/unkin/vault-plugin-secrets-rancher" +export PACKAGE_LICENSE="MIT" + +build_flavor() { + export PACKAGE_NAME="$1" + export PACKAGE_PLUGIN_DIR="$2" + export PACKAGE_PREINSTALL="${DIST}/preinstall-${PACKAGE_NAME}.sh" + envsubst '${PACKAGE_PLUGIN_DIR}' < packaging/scripts/preinstall.sh.tmpl > "${PACKAGE_PREINSTALL}" + envsubst < packaging/nfpm.yaml > "${DIST}/nfpm-${PACKAGE_NAME}.yaml" + nfpm pkg --config "${DIST}/nfpm-${PACKAGE_NAME}.yaml" --target "${DIST}" --packager rpm +} + +build_flavor "vault-plugin-secrets-rancher" "/opt/vault-plugins" +build_flavor "openbao-plugin-secrets-rancher" "/opt/openbao-plugins" + +echo "Built:" +ls -1 "${DIST}"/*.rpm diff --git a/scripts/e2e.sh b/scripts/e2e.sh new file mode 100755 index 0000000..316d891 --- /dev/null +++ b/scripts/e2e.sh @@ -0,0 +1,114 @@ +#!/usr/bin/env bash +# +# End-to-end test for vault-plugin-secrets-rancher. +# +# Builds the plugin, brings up a mock Rancher ext.cattle.io API plus both Vault +# and OpenBao, then drives the identical lifecycle against each engine to prove +# the same binary works on both: +# configure -> service-account (seed) -> rotate -> role -> creds -> revoke. +# +# Select engines with ENGINES (default "vault openbao"), e.g. ENGINES=openbao. +# +set -euo pipefail + +ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)" +COMPOSE_FILE="${ROOT_DIR}/test/docker-compose.yml" +COMPOSE="docker compose -f ${COMPOSE_FILE}" +BINARY="vault-plugin-secrets-rancher" + +SEED_TOKEN="seed-token" +RANCHER_ADDR="http://127.0.0.1:8443" # mock rancher, from the host +MOUNT="rancher" +ENGINES="${ENGINES:-vault openbao}" + +red() { printf '\033[31m%s\033[0m\n' "$*"; } +green() { printf '\033[32m%s\033[0m\n' "$*"; } +blue() { printf '\033[34m==> %s\033[0m\n' "$*"; } + +cleanup() { blue "Tearing down containers"; ${COMPOSE} down -v >/dev/null 2>&1 || true; } +trap cleanup EXIT +fail() { red "FAIL: $*"; exit 1; } + +wait_for() { + local desc="$1"; shift + local i=0 + until "$@" >/dev/null 2>&1; do + i=$((i + 1)) + [ "$i" -ge "${WAIT_RETRIES:-90}" ] && fail "timed out waiting for ${desc}" + sleep 2 + done + green "ready: ${desc}" +} + +# token_status NAME BEARER -> HTTP status of GET on the mock rancher token. +token_status() { + curl -s -o /dev/null -w '%{http_code}' \ + -H "Authorization: Bearer $2" \ + "${RANCHER_ADDR}/apis/ext.cattle.io/v1/tokens/$1" +} + +jq_field() { python3 -c "import sys,json;print(json.load(sys.stdin)$1)"; } + +run_engine() { + local engine="$1" container="$2" cli="$3" + blue "[${engine}] exercising the plugin" + ex() { ${COMPOSE} exec -T "${container}" "${cli}" "$@"; } + + local sha; sha="$(sha256sum "${ROOT_DIR}/dist/${BINARY}" | awk '{print $1}')" + ex plugin register -sha256="${sha}" secret "${BINARY}" >/dev/null || true + ex secrets disable "${MOUNT}" >/dev/null 2>&1 || true + ex secrets enable -path="${MOUNT}" "${BINARY}" >/dev/null + green "[${engine}] plugin registered and mounted" + + # The plugin runs inside the engine container, so it reaches rancher by name. + ex write "${MOUNT}/config" rancher_url="http://rancher:8443" tls_skip_verify=true >/dev/null + green "[${engine}] configured" + + # --- service account: seed + manual rotate --- + ex write "${MOUNT}/service-accounts/admin" token="${SEED_TOKEN}" \ + token_ttl=2160h rotation_period=1080h >/dev/null + local rot newname + rot="$(ex write -format=json "${MOUNT}/service-accounts/admin/rotate" -force)" + newname="$(printf '%s' "${rot}" | jq_field '["data"]["token_name"]')" + [ -n "${newname}" ] || fail "[${engine}] rotate returned no token_name" + green "[${engine}] service account rotated -> ${newname}" + + # --- role + dynamic creds --- + ex write "${MOUNT}/roles/ci" service_account="admin" cluster_name="c-m-abc123" ttl=1h max_ttl=24h >/dev/null + local json name lease tok + json="$(ex read -format=json "${MOUNT}/creds/ci")" + name="$(printf '%s' "${json}" | jq_field '["data"]["token_name"]')" + lease="$(printf '%s' "${json}" | jq_field '["lease_id"]')" + tok="$(printf '%s' "${json}" | jq_field '["data"]["token"]')" + [ -n "${name}" ] || fail "[${engine}] no dynamic token returned" + [ -n "${tok}" ] || fail "[${engine}] dynamic creds returned empty token value" + # The rotated admin token (not the original seed) minted it; verify via that token. + [ "$(token_status "${name}" "${tok}")" = "200" ] || fail "[${engine}] dynamic token ${name} not present in rancher" + green "[${engine}] dynamic token ${name} issued (lease ${lease})" + + # revoke -> token deleted from rancher + ex lease revoke "${lease}" >/dev/null + sleep 2 + [ "$(token_status "${name}" "${SEED_TOKEN}")" = "404" ] || fail "[${engine}] revoked token still present in rancher" + green "[${engine}] revoked token removed from rancher" + + green "[${engine}] PASSED" +} + +blue "Building plugin for linux/amd64" +OS=linux ARCH=amd64 PLUGIN_DIR="${ROOT_DIR}/dist" make -C "${ROOT_DIR}" build + +blue "Starting Docker stack (rancher + vault + openbao)" +${COMPOSE} up -d --build + +wait_for "rancher" curl -fsS "${RANCHER_ADDR}/healthz" + +for engine in ${ENGINES}; do + case "${engine}" in + vault) wait_for "vault" ${COMPOSE} exec -T vault vault status -address=http://127.0.0.1:8200; run_engine vault vault vault ;; + openbao) wait_for "openbao" ${COMPOSE} exec -T openbao bao status -address=http://127.0.0.1:8200; run_engine openbao openbao bao ;; + *) fail "unknown engine: ${engine}" ;; + esac +done + +green "ALL END-TO-END CHECKS PASSED (${ENGINES})" diff --git a/secret_token.go b/secret_token.go new file mode 100644 index 0000000..85f9a55 --- /dev/null +++ b/secret_token.go @@ -0,0 +1,85 @@ +package rancher + +import ( + "context" + "errors" + "fmt" + + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" +) + +const rancherTokenType = "rancher_token" + +func (b *rancherBackend) rancherTokenSecret() *framework.Secret { + return &framework.Secret{ + Type: rancherTokenType, + Fields: map[string]*framework.FieldSchema{ + "token": { + Type: framework.TypeString, + Description: "The Rancher API token value.", + }, + "token_name": { + Type: framework.TypeString, + Description: "The ext.cattle.io Token resource name.", + }, + "cluster_name": { + Type: framework.TypeString, + Description: "The cluster the token is scoped to (empty = full scope).", + }, + }, + Revoke: b.secretRevoke, + Renew: b.secretRenew, + } +} + +// secretRevoke deletes the minted Rancher token via the ext.cattle.io API, using +// the service account that issued it. +func (b *rancherBackend) secretRevoke(ctx context.Context, req *logical.Request, _ *framework.FieldData) (*logical.Response, error) { + tokenName, err := internalString(req.Secret.InternalData, "token_name") + if err != nil { + return nil, err + } + saName, err := internalString(req.Secret.InternalData, "service_account") + if err != nil { + return nil, err + } + + sa, err := b.getServiceAccount(ctx, req.Storage, saName) + if err != nil { + return nil, err + } + if sa == nil { + // The issuing service account is gone; nothing left that could revoke + // the token here. Rancher will expire it at its own TTL. + return nil, fmt.Errorf("service account %q no longer exists; cannot revoke token %q", saName, tokenName) + } + + client, err := b.clientFor(ctx, req.Storage, sa.Token) + if err != nil { + return nil, err + } + if err := client.DeleteToken(ctx, tokenName); err != nil { + return nil, fmt.Errorf("revoking rancher token %q: %w", tokenName, err) + } + return nil, nil +} + +// secretRenew extends the Vault lease; the token material is unchanged. Note the +// Rancher-side token TTL is fixed at creation, so a renewed lease should stay +// within the token's original TTL (bounded by the role max_ttl). +func (b *rancherBackend) secretRenew(_ context.Context, req *logical.Request, _ *framework.FieldData) (*logical.Response, error) { + return &logical.Response{Secret: req.Secret}, nil +} + +func internalString(data map[string]interface{}, key string) (string, error) { + raw, ok := data[key] + if !ok { + return "", fmt.Errorf("secret is missing internal %s data", key) + } + s, ok := raw.(string) + if !ok { + return "", errors.New("secret internal " + key + " data is not a string") + } + return s, nil +} diff --git a/test/docker-compose.yml b/test/docker-compose.yml new file mode 100644 index 0000000..13bdee5 --- /dev/null +++ b/test/docker-compose.yml @@ -0,0 +1,63 @@ +# End-to-end test stack. A mock Rancher ext.cattle.io Token API (in-memory, no +# k8s) plus two secrets-engine hosts running the exact same plugin binary: +# HashiCorp Vault and OpenBao. Bind mounts use ":z" so they work under SELinux. +services: + rancher: + image: golang:1.25-alpine + working_dir: /src + environment: + MOCKRANCHER_ADDR: ":8443" + MOCKRANCHER_TOKEN: "seed-token" + GOFLAGS: "-mod=mod" + command: ["go", "run", "./test/mockrancher"] + volumes: + - ..:/src:ro,z + ports: + - "8443:8443" + healthcheck: + test: ["CMD", "wget", "-qO-", "http://localhost:8443/healthz"] + interval: 3s + timeout: 3s + retries: 40 + + vault: + image: hashicorp/vault:1.18 + depends_on: + rancher: + condition: service_healthy + cap_add: [IPC_LOCK] + environment: + VAULT_DEV_ROOT_TOKEN_ID: root + VAULT_ADDR: http://127.0.0.1:8200 + VAULT_TOKEN: root + command: ["server", "-dev", "-dev-listen-address=0.0.0.0:8200", "-config=/vault/vault.hcl"] + volumes: + - ../dist:/vault/plugins:ro,z + - ./vault/vault.hcl:/vault/vault.hcl:ro,z + ports: ["8200:8200"] + healthcheck: + test: ["CMD", "vault", "status", "-address=http://127.0.0.1:8200"] + interval: 3s + timeout: 3s + retries: 20 + + openbao: + image: openbao/openbao:latest + depends_on: + rancher: + condition: service_healthy + cap_add: [IPC_LOCK] + environment: + BAO_DEV_ROOT_TOKEN_ID: root + BAO_ADDR: http://127.0.0.1:8200 + BAO_TOKEN: root + command: ["server", "-dev", "-dev-listen-address=0.0.0.0:8200", "-config=/openbao/bao.hcl"] + volumes: + - ../dist:/openbao/plugins:ro,z + - ./openbao/bao.hcl:/openbao/bao.hcl:ro,z + ports: ["8300:8200"] + healthcheck: + test: ["CMD", "bao", "status", "-address=http://127.0.0.1:8200"] + interval: 3s + timeout: 3s + retries: 20 diff --git a/test/mockrancher/main.go b/test/mockrancher/main.go new file mode 100644 index 0000000..066cc50 --- /dev/null +++ b/test/mockrancher/main.go @@ -0,0 +1,156 @@ +// Command mockrancher is an in-memory stand-in for the Rancher aggregated API +// server's tokens.ext.cattle.io resource, used by the e2e tests. It implements +// just enough of the Token contract the plugin uses (create/get/delete) — no +// Kubernetes or real Rancher required. Not for production use. +// +// A bearer is accepted if it is the seed token (MOCKRANCHER_TOKEN) or any token +// this server previously minted; that lets a rotated token mint further tokens, +// exactly as the plugin's root-rotation relies on. +package main + +import ( + "crypto/rand" + "encoding/hex" + "encoding/json" + "log" + "net/http" + "os" + "strings" + "sync" +) + +type tokenMeta struct { + Name string `json:"name,omitempty"` + GenerateName string `json:"generateName,omitempty"` +} + +type tokenSpec struct { + Description string `json:"description,omitempty"` + TTL int64 `json:"ttl,omitempty"` + ClusterName string `json:"clusterName,omitempty"` +} + +type tokenStatus struct { + Value string `json:"value,omitempty"` +} + +type token struct { + APIVersion string `json:"apiVersion"` + Kind string `json:"kind"` + Metadata tokenMeta `json:"metadata"` + Spec tokenSpec `json:"spec"` + Status tokenStatus `json:"status"` +} + +type store struct { + mu sync.Mutex + tokens map[string]*token // by metadata.name + valid map[string]string // bearer value -> metadata.name +} + +func randHex(n int) string { + buf := make([]byte, n) + _, _ = rand.Read(buf) + return hex.EncodeToString(buf) +} + +func (s *store) authName(r *http.Request) (string, bool) { + bearer := strings.TrimPrefix(r.Header.Get("Authorization"), "Bearer ") + if bearer == "" { + return "", false + } + s.mu.Lock() + defer s.mu.Unlock() + name, ok := s.valid[bearer] + return name, ok +} + +const apiPrefix = "/apis/ext.cattle.io/v1/tokens" + +func (s *store) handle(w http.ResponseWriter, r *http.Request) { + if _, ok := s.authName(r); !ok { + http.Error(w, "unauthorized", http.StatusUnauthorized) + return + } + name := strings.Trim(strings.TrimPrefix(r.URL.Path, apiPrefix), "/") + + s.mu.Lock() + defer s.mu.Unlock() + + switch { + case r.Method == http.MethodPost && name == "": // create + var req token + if err := json.NewDecoder(r.Body).Decode(&req); err != nil { + http.Error(w, "bad body", http.StatusBadRequest) + return + } + newName := req.Metadata.Name + if newName == "" { + newName = req.Metadata.GenerateName + randHex(4) + } + value := "token-" + newName + ":" + randHex(16) + t := &token{ + APIVersion: "ext.cattle.io/v1", + Kind: "Token", + Metadata: tokenMeta{Name: newName}, + Spec: req.Spec, + Status: tokenStatus{Value: value}, + } + s.tokens[newName] = t + s.valid[value] = newName + writeJSON(w, http.StatusCreated, t) + case r.Method == http.MethodGet && name != "": // read + t, ok := s.tokens[name] + if !ok { + http.NotFound(w, r) + return + } + // The value is only returned at creation; blank it on read. + out := *t + out.Status.Value = "" + writeJSON(w, http.StatusOK, &out) + case r.Method == http.MethodDelete && name != "": // delete + t, ok := s.tokens[name] + if !ok { + http.NotFound(w, r) + return + } + for v, n := range s.valid { + if n == name { + delete(s.valid, v) + } + } + delete(s.tokens, name) + _ = t + w.WriteHeader(http.StatusOK) + default: + http.Error(w, "not found", http.StatusNotFound) + } +} + +func writeJSON(w http.ResponseWriter, code int, v interface{}) { + w.Header().Set("Content-Type", "application/json") + w.WriteHeader(code) + _ = json.NewEncoder(w).Encode(v) +} + +func main() { + addr := os.Getenv("MOCKRANCHER_ADDR") + if addr == "" { + addr = ":8443" + } + seed := os.Getenv("MOCKRANCHER_TOKEN") + if seed == "" { + seed = "seed-token" + } + s := &store{ + tokens: map[string]*token{}, + valid: map[string]string{seed: "seed"}, + } + mux := http.NewServeMux() + mux.HandleFunc(apiPrefix, s.handle) + mux.HandleFunc(apiPrefix+"/", s.handle) + mux.HandleFunc("/healthz", func(w http.ResponseWriter, _ *http.Request) { _, _ = w.Write([]byte("ok")) }) + log.Printf("mock rancher ext.cattle.io API listening on %s", addr) + log.Fatal(http.ListenAndServe(addr, mux)) //nolint:gosec // test-only mock +} diff --git a/test/openbao/bao.hcl b/test/openbao/bao.hcl new file mode 100644 index 0000000..391c032 --- /dev/null +++ b/test/openbao/bao.hcl @@ -0,0 +1,4 @@ +# OpenBao is plugin-protocol compatible with Vault, so the very same plugin +# binary registers and runs here unchanged. Combined with `-dev` at runtime. +plugin_directory = "/openbao/plugins" +api_addr = "http://127.0.0.1:8200" diff --git a/test/vault/vault.hcl b/test/vault/vault.hcl new file mode 100644 index 0000000..f848cfd --- /dev/null +++ b/test/vault/vault.hcl @@ -0,0 +1,4 @@ +# Combined with `-dev` at runtime; supplies the plugin_directory the dev server +# would otherwise leave unset, so the plugin binary in ../dist can be registered. +plugin_directory = "/vault/plugins" +api_addr = "http://127.0.0.1:8200"