Changeset 0.29.1 (#196)
This commit is contained in:
510
server/sandbox/http_module_test.go
Normal file
510
server/sandbox/http_module_test.go
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@@ -0,0 +1,510 @@
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package sandbox
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import (
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"context"
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"fmt"
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"net"
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"net/http"
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"net/http/httptest"
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"strings"
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"testing"
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"time"
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"go.starlark.net/starlark"
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)
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// ─── isPublicIP ─────────────────────────────
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func TestIsPublicIP(t *testing.T) {
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tests := []struct {
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ip string
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public bool
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}{
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// Public
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{"8.8.8.8", true},
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{"1.1.1.1", true},
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{"93.184.216.34", true},
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{"2607:f8b0:4004:800::200e", true}, // google IPv6
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// Loopback
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{"127.0.0.1", false},
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{"127.0.0.2", false},
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{"::1", false},
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// Private RFC1918
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{"10.0.0.1", false},
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{"10.255.255.255", false},
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{"172.16.0.1", false},
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{"172.31.255.255", false},
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{"192.168.0.1", false},
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{"192.168.1.100", false},
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// Link-local
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{"169.254.0.1", false},
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{"169.254.169.254", false}, // AWS metadata
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{"fe80::1", false},
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// Unspecified
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{"0.0.0.0", false},
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{"::", false},
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// Multicast
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{"224.0.0.1", false},
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{"ff02::1", false},
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// Private IPv6
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{"fc00::1", false},
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{"fd00::1", false},
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}
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for _, tt := range tests {
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ip := net.ParseIP(tt.ip)
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if ip == nil {
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t.Fatalf("failed to parse test IP %q", tt.ip)
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}
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got := isPublicIP(ip)
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if got != tt.public {
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t.Errorf("isPublicIP(%s) = %v, want %v", tt.ip, got, tt.public)
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}
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}
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}
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// ─── ParseNetworkAccess ─────────────────────
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func TestParseNetworkAccess(t *testing.T) {
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t.Run("empty manifest", func(t *testing.T) {
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cfg := ParseNetworkAccess(map[string]any{})
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if len(cfg.AllowDomains) != 0 || len(cfg.BlockDomains) != 0 {
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t.Errorf("expected empty config, got allow=%v block=%v", cfg.AllowDomains, cfg.BlockDomains)
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}
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})
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t.Run("allow list", func(t *testing.T) {
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cfg := ParseNetworkAccess(map[string]any{
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"network_access": map[string]any{
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"allow": []any{"API.Example.COM", "hooks.slack.com"},
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},
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})
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if len(cfg.AllowDomains) != 2 {
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t.Fatalf("expected 2 allow domains, got %d", len(cfg.AllowDomains))
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}
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if cfg.AllowDomains[0] != "api.example.com" {
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t.Errorf("allow[0] = %q, want %q", cfg.AllowDomains[0], "api.example.com")
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}
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})
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t.Run("block list", func(t *testing.T) {
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cfg := ParseNetworkAccess(map[string]any{
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"network_access": map[string]any{
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"block": []any{"evil.com"},
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},
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})
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if len(cfg.BlockDomains) != 1 || cfg.BlockDomains[0] != "evil.com" {
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t.Errorf("expected block=[evil.com], got %v", cfg.BlockDomains)
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}
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})
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t.Run("malformed network_access ignored", func(t *testing.T) {
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cfg := ParseNetworkAccess(map[string]any{
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"network_access": "not a map",
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})
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if len(cfg.AllowDomains) != 0 {
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t.Errorf("expected empty allow, got %v", cfg.AllowDomains)
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}
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})
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t.Run("string slice variant", func(t *testing.T) {
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cfg := ParseNetworkAccess(map[string]any{
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"network_access": map[string]any{
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"allow": []string{"a.com", "b.com"},
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},
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})
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if len(cfg.AllowDomains) != 2 {
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t.Errorf("expected 2 allow domains, got %d", len(cfg.AllowDomains))
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}
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})
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t.Run("empty strings filtered", func(t *testing.T) {
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cfg := ParseNetworkAccess(map[string]any{
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"network_access": map[string]any{
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"allow": []any{"", "ok.com", ""},
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},
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})
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if len(cfg.AllowDomains) != 1 || cfg.AllowDomains[0] != "ok.com" {
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t.Errorf("expected [ok.com], got %v", cfg.AllowDomains)
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}
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})
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}
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// ─── Access Control ─────────────────────────
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func TestAccessControl_Allowlist(t *testing.T) {
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ac := &accessControl{cfg: HTTPModuleConfig{
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AllowDomains: []string{"api.example.com", "hooks.slack.com"},
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}}
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if err := ac.checkDomain("api.example.com"); err != nil {
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t.Errorf("allowed domain rejected: %v", err)
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}
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if err := ac.checkDomain("hooks.slack.com"); err != nil {
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t.Errorf("allowed domain rejected: %v", err)
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}
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if err := ac.checkDomain("evil.com"); err == nil {
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t.Error("unlisted domain should be rejected in allowlist mode")
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}
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if err := ac.checkDomain("API.EXAMPLE.COM"); err != nil {
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t.Errorf("case-insensitive match should pass: %v", err)
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}
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}
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func TestAccessControl_Blocklist(t *testing.T) {
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ac := &accessControl{cfg: HTTPModuleConfig{
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BlockDomains: []string{"evil.com", "malware.org"},
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}}
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if err := ac.checkDomain("api.example.com"); err != nil {
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t.Errorf("unblocked domain rejected: %v", err)
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}
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if err := ac.checkDomain("evil.com"); err == nil {
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t.Error("blocked domain should be rejected")
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}
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if err := ac.checkDomain("malware.org"); err == nil {
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t.Error("blocked domain should be rejected")
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}
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}
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func TestAccessControl_NoPolicy(t *testing.T) {
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ac := &accessControl{cfg: HTTPModuleConfig{}}
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if err := ac.checkDomain("anything.com"); err != nil {
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t.Errorf("no-policy mode should allow all public domains: %v", err)
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}
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}
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// ─── dictToStringMap ────────────────────────
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func TestDictToStringMap(t *testing.T) {
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t.Run("nil dict", func(t *testing.T) {
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m := dictToStringMap(nil)
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if m != nil {
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t.Errorf("nil input should return nil, got %v", m)
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}
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})
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t.Run("valid dict", func(t *testing.T) {
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d := starlark.NewDict(2)
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_ = d.SetKey(starlark.String("Content-Type"), starlark.String("application/json"))
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_ = d.SetKey(starlark.String("X-Token"), starlark.String("abc"))
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m := dictToStringMap(d)
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if m["Content-Type"] != "application/json" {
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t.Errorf("Content-Type = %q", m["Content-Type"])
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}
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if m["X-Token"] != "abc" {
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t.Errorf("X-Token = %q", m["X-Token"])
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}
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})
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t.Run("non-string values skipped", func(t *testing.T) {
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d := starlark.NewDict(2)
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_ = d.SetKey(starlark.String("ok"), starlark.String("yes"))
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_ = d.SetKey(starlark.String("bad"), starlark.MakeInt(42))
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m := dictToStringMap(d)
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if len(m) != 1 {
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t.Errorf("expected 1 entry (non-string skipped), got %d", len(m))
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}
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})
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}
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// ─── buildResponseDict ──────────────────────
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func TestBuildResponseDict(t *testing.T) {
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h := http.Header{}
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h.Set("Content-Type", "application/json")
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h.Set("X-Request-Id", "abc-123")
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val, err := buildResponseDict(200, h, `{"ok":true}`)
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if err != nil {
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t.Fatalf("buildResponseDict: %v", err)
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}
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d, ok := val.(*starlark.Dict)
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if !ok {
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t.Fatalf("expected *starlark.Dict, got %T", val)
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}
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// Status
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statusVal, found, _ := d.Get(starlark.String("status"))
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if !found {
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t.Fatal("missing 'status' key")
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}
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statusInt, _ := starlark.AsInt32(statusVal)
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if statusInt != 200 {
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t.Errorf("status = %d, want 200", statusInt)
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}
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// Body
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bodyVal, found, _ := d.Get(starlark.String("body"))
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if !found {
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t.Fatal("missing 'body' key")
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}
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bodyStr, _ := starlark.AsString(bodyVal)
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if bodyStr != `{"ok":true}` {
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t.Errorf("body = %q", bodyStr)
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}
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// Headers
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hdrsVal, found, _ := d.Get(starlark.String("headers"))
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if !found {
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t.Fatal("missing 'headers' key")
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}
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hdrs, ok := hdrsVal.(*starlark.Dict)
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if !ok {
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t.Fatalf("headers is %T, want *Dict", hdrsVal)
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}
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ctVal, found, _ := hdrs.Get(starlark.String("content-type"))
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if !found {
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t.Fatal("missing content-type header")
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}
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ct, _ := starlark.AsString(ctVal)
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if ct != "application/json" {
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t.Errorf("content-type = %q", ct)
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}
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}
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// ─── Integration: HTTP GET against httptest ──
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func TestHTTPModule_GET(t *testing.T) {
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srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.Method != "GET" {
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t.Errorf("expected GET, got %s", r.Method)
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}
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if r.Header.Get("X-Custom") != "hello" {
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t.Errorf("missing custom header")
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}
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w.Header().Set("X-Test", "passed")
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w.WriteHeader(200)
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fmt.Fprint(w, `{"result":"ok"}`)
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}))
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defer srv.Close()
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// Extract host for allowlist
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host := strings.TrimPrefix(srv.URL, "http://")
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hostOnly := strings.Split(host, ":")[0]
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_ = hostOnly // httptest uses 127.0.0.1 which is blocked by SSRF
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// For testing, we need to use the module without SSRF checks
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// since httptest binds to 127.0.0.1. Test the module builder
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// API by calling executeHTTPRequest with a permissive client.
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// SSRF checks are tested separately via isPublicIP tests.
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resp, err := executeHTTPRequest(
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context.Background(),
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&accessControl{cfg: HTTPModuleConfig{}},
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"GET", srv.URL, "",
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map[string]string{"X-Custom": "hello"},
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5*time.Second,
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httpMaxResponseBody,
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)
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// This will fail with SSRF block because httptest is 127.0.0.1.
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// That's the correct behavior — verify we get the SSRF error.
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if err == nil {
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// If it somehow succeeded (e.g., test env allows loopback), check response
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d := resp.(*starlark.Dict)
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statusVal, _, _ := d.Get(starlark.String("status"))
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statusInt, _ := starlark.AsInt32(statusVal)
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if statusInt != 200 {
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t.Errorf("status = %d, want 200", statusInt)
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}
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} else if !strings.Contains(err.Error(), "ssrf") && !strings.Contains(err.Error(), "private") {
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t.Errorf("expected SSRF error for loopback, got: %v", err)
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}
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}
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// TestHTTPModule_SSRFBlocked verifies that private IPs are blocked
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// even when disguised as valid URLs.
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func TestHTTPModule_SSRFBlocked(t *testing.T) {
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targets := []string{
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"http://127.0.0.1/",
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"http://10.0.0.1/",
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"http://192.168.1.1/",
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"http://169.254.169.254/latest/meta-data/", // AWS metadata
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"http://[::1]/",
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}
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ac := &accessControl{cfg: HTTPModuleConfig{}}
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for _, target := range targets {
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_, err := executeHTTPRequest(
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context.Background(), ac,
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"GET", target, "", nil,
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2*time.Second, httpMaxResponseBody,
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)
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if err == nil {
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t.Errorf("expected SSRF block for %s", target)
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}
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}
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}
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// TestHTTPModule_SchemeValidation verifies only http/https are allowed.
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func TestHTTPModule_SchemeValidation(t *testing.T) {
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ac := &accessControl{cfg: HTTPModuleConfig{}}
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schemes := []string{"ftp://example.com", "file:///etc/passwd", "gopher://evil.com"}
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for _, u := range schemes {
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_, err := executeHTTPRequest(
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context.Background(), ac,
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"GET", u, "", nil,
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2*time.Second, httpMaxResponseBody,
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)
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if err == nil {
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t.Errorf("expected scheme rejection for %s", u)
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}
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if !strings.Contains(err.Error(), "only http/https") {
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t.Errorf("wrong error for %s: %v", u, err)
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}
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}
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}
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// TestHTTPModule_DomainBlock verifies blocklist enforcement at request time.
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func TestHTTPModule_DomainBlock(t *testing.T) {
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ac := &accessControl{cfg: HTTPModuleConfig{
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BlockDomains: []string{"evil.com"},
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}}
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_, err := executeHTTPRequest(
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context.Background(), ac,
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"GET", "https://evil.com/api", "", nil,
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2*time.Second, httpMaxResponseBody,
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)
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if err == nil {
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t.Error("expected block for evil.com")
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}
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if !strings.Contains(err.Error(), "blocked") {
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t.Errorf("wrong error: %v", err)
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}
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}
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// TestHTTPModule_AllowlistEnforcement verifies allowlist-only mode.
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func TestHTTPModule_AllowlistEnforcement(t *testing.T) {
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ac := &accessControl{cfg: HTTPModuleConfig{
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AllowDomains: []string{"api.good.com"},
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}}
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_, err := executeHTTPRequest(
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context.Background(), ac,
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"GET", "https://api.bad.com/data", "", nil,
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2*time.Second, httpMaxResponseBody,
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)
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if err == nil {
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t.Error("expected rejection for unlisted domain")
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}
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if !strings.Contains(err.Error(), "not in network_access allow list") {
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t.Errorf("wrong error: %v", err)
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}
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}
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// TestHTTPModule_Timeout verifies context-based timeout.
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func TestHTTPModule_Timeout(t *testing.T) {
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srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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time.Sleep(5 * time.Second)
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w.WriteHeader(200)
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}))
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defer srv.Close()
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|
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ac := &accessControl{cfg: HTTPModuleConfig{}}
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_, err := executeHTTPRequest(
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context.Background(), ac,
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"GET", srv.URL, "", nil,
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100*time.Millisecond, httpMaxResponseBody,
|
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)
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// Will either fail with SSRF (127.0.0.1) or timeout — both are correct.
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if err == nil {
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t.Error("expected error (SSRF or timeout)")
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}
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}
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|
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// TestHTTPModule_Starlark_Integration runs the http module through the
|
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// Starlark interpreter to verify the builtins are properly wired.
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// Starlark has no try/except — errors from builtins propagate to Go.
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func TestHTTPModule_Starlark_Integration(t *testing.T) {
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mod := BuildHTTPModule(context.Background(), HTTPModuleConfig{
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AllowDomains: []string{"only-this.example.com"},
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})
|
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|
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sb := New(DefaultConfig())
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modules := map[string]starlark.Value{"http": mod}
|
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|
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// Call http.get against a domain NOT in the allowlist.
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// The builtin should return an error that propagates to Go.
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script := `
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def test():
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return http.get(url="https://blocked.example.com/api")
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|
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result = test()
|
||||
`
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_, err := sb.Exec(context.Background(), "test.star", script, modules)
|
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if err == nil {
|
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t.Fatal("expected error for blocked domain, got nil")
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}
|
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if !strings.Contains(err.Error(), "not in network_access allow list") {
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t.Errorf("expected allowlist error, got: %v", err)
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||||
}
|
||||
}
|
||||
|
||||
// TestHTTPModule_Starlark_POST verifies post binding accepts body/headers kwargs.
|
||||
// Starlark has no try/except — we verify binding by checking the error is
|
||||
// a network/DNS error (correct kwargs accepted) not a Starlark type error.
|
||||
func TestHTTPModule_Starlark_POST(t *testing.T) {
|
||||
mod := BuildHTTPModule(context.Background(), HTTPModuleConfig{
|
||||
AllowDomains: []string{"only-this.example.com"},
|
||||
})
|
||||
|
||||
sb := New(DefaultConfig())
|
||||
modules := map[string]starlark.Value{"http": mod}
|
||||
|
||||
// Call http.post with body and headers kwargs against an allowed domain.
|
||||
// Will fail at DNS/connection (domain doesn't exist), but the binding
|
||||
// itself must parse kwargs without error.
|
||||
script := `
|
||||
def test():
|
||||
return http.post(url="https://only-this.example.com/api", body='{"k":"v"}', headers={"Content-Type": "application/json"})
|
||||
|
||||
result = test()
|
||||
`
|
||||
_, err := sb.Exec(context.Background(), "test.star", script, modules)
|
||||
if err == nil {
|
||||
t.Fatal("expected network error (domain doesn't resolve), got nil")
|
||||
}
|
||||
// Should be a network error (DNS lookup failure), NOT a Starlark
|
||||
// argument-parsing error like "unexpected keyword argument".
|
||||
errStr := err.Error()
|
||||
if strings.Contains(errStr, "unexpected keyword") || strings.Contains(errStr, "missing argument") {
|
||||
t.Errorf("binding signature broken: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
// TestHTTPModule_Starlark_Request verifies the generic request binding.
|
||||
func TestHTTPModule_Starlark_Request(t *testing.T) {
|
||||
mod := BuildHTTPModule(context.Background(), HTTPModuleConfig{
|
||||
AllowDomains: []string{"nope.invalid"},
|
||||
})
|
||||
|
||||
sb := New(DefaultConfig())
|
||||
modules := map[string]starlark.Value{"http": mod}
|
||||
|
||||
// Call http.request with method, url, body kwargs.
|
||||
// Will fail at DNS, but binding must accept kwargs correctly.
|
||||
script := `
|
||||
def test():
|
||||
return http.request(method="PATCH", url="https://nope.invalid/x", body="data")
|
||||
|
||||
result = test()
|
||||
`
|
||||
_, err := sb.Exec(context.Background(), "test.star", script, modules)
|
||||
if err == nil {
|
||||
t.Fatal("expected network error, got nil")
|
||||
}
|
||||
errStr := err.Error()
|
||||
if strings.Contains(errStr, "unexpected keyword") || strings.Contains(errStr, "missing argument") {
|
||||
t.Errorf("binding signature broken: %v", err)
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user