Niko Marmeladkov
9d66003689
- server: relay storing signed objects (PUT/GET), per-IP rate limiting, per-subject quota (1000), one-response-per-request, pagination, /v1/healthz /v1/readyz /v1/metrics - verify: signature-verifying trust evaluator; every object is checked via env.Verify(), approvals via VerifyApprovalResponse, revocations via VerifyRevocationOf; k-of-n approval quorum - docs: TRUST-MODEL.md and API.md describing issuer-anchored signatures and the endpoint/status-code contract - tests: server, verify, and ratelimit packages
394 lines
12 KiB
Go
394 lines
12 KiB
Go
package protocol_test
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import (
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"errors"
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"fmt"
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"strings"
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"testing"
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"git.n1ko.dev/Niko/niko_trust/internal/protocol"
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"git.n1ko.dev/Niko/niko_trust/internal/tce"
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)
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// Rule tests for the per-object constraints of PROTOCOL.md section 8. The
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// primitive limits (UTF-8, uvarints, maps, numbers) are covered in
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// internal/tce; these cover the object-level rules: field bounds, expiry
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// relationships, the 60-second approval lifetime, the two-valued decision and
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// the whole-object size limits.
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func TestEncodeClaimRules(t *testing.T) {
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fx := newSignerFixtures(t)
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good := func() *protocol.Claim {
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return &protocol.Claim{
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Issuer: fx.alice.Public(), Subject: fx.bob.Public(),
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Claims: map[string]tce.Value{"example.flag": tce.Bool(true)},
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CreatedAt: 1_700_000_000, ExpiresAt: 1_700_086_400, Serial: 1,
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Nonce: nonce(1),
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}
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}
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t.Run("empty claims map", func(t *testing.T) {
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c := good()
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c.Claims = nil
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if _, err := protocol.EncodeClaim(c); !errors.Is(err, tce.ErrEmptyMap) {
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t.Fatalf("err = %v, want ErrEmptyMap", err)
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}
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})
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t.Run("expires_at equal to created_at", func(t *testing.T) {
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c := good()
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c.ExpiresAt = c.CreatedAt
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if _, err := protocol.EncodeClaim(c); !errors.Is(err, tce.ErrExpiry) {
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t.Fatalf("err = %v, want ErrExpiry", err)
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}
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})
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t.Run("expires_at before created_at", func(t *testing.T) {
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c := good()
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c.ExpiresAt = c.CreatedAt - 1
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if _, err := protocol.EncodeClaim(c); !errors.Is(err, tce.ErrExpiry) {
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t.Fatalf("err = %v, want ErrExpiry", err)
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}
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})
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t.Run("expires_at zero is allowed", func(t *testing.T) {
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c := good()
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c.ExpiresAt = 0
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b, err := protocol.EncodeClaim(c)
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if err != nil {
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t.Fatalf("expires_at 0 rejected: %v", err)
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}
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dec, err := protocol.DecodeClaim(b)
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if err != nil {
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t.Fatal(err)
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}
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if dec.ExpiresAt != 0 {
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t.Fatalf("expires_at = %d", dec.ExpiresAt)
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}
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})
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t.Run("wrong nonce length", func(t *testing.T) {
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c := good()
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c.Nonce = make([]byte, 15)
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if _, err := protocol.EncodeClaim(c); !errors.Is(err, tce.ErrFieldSize) {
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t.Fatalf("err = %v, want ErrFieldSize", err)
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}
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})
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t.Run("too many claim entries", func(t *testing.T) {
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c := good()
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m := make(map[string]tce.Value)
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for i := 0; i < 33; i++ {
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m[fmt.Sprintf("k%d", i)] = tce.Bool(true)
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}
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c.Claims = m
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if _, err := protocol.EncodeClaim(c); !errors.Is(err, tce.ErrTooLong) {
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t.Fatalf("err = %v, want ErrTooLong", err)
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}
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})
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t.Run("object exceeds whole limit", func(t *testing.T) {
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c := good()
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// 32 maximum-length string values push the claim past 4096 bytes.
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m := make(map[string]tce.Value)
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for i := 0; i < 32; i++ {
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m[fmt.Sprintf("v%d", i)] = tce.String(strings.Repeat("x", tce.MaxStringValue))
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}
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c.Claims = m
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if _, err := protocol.EncodeClaim(c); !errors.Is(err, tce.ErrObjectTooLarge) {
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t.Fatalf("err = %v, want ErrObjectTooLarge", err)
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}
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})
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t.Run("degenerate issuer key", func(t *testing.T) {
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c := good()
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c.Issuer = make([]byte, 32) // all zeros: small order, forgeable
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if _, err := protocol.EncodeClaim(c); err == nil {
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t.Fatal("encoded a claim over the degenerate key")
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}
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})
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t.Run("field order matches section 8.2", func(t *testing.T) {
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b, err := protocol.EncodeClaim(good())
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if err != nil {
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t.Fatal(err)
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}
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if string(b[:tce.MagicLen]) != tce.Magic {
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t.Fatal("object does not start with the magic")
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}
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if b[tce.MagicLen] != byte(tce.TagClaim) {
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t.Fatal("wrong object tag")
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}
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})
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}
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func TestEncodeApprovalRequestRules(t *testing.T) {
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fx := newSignerFixtures(t)
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good := func() *protocol.ApprovalRequest {
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return &protocol.ApprovalRequest{
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Sender: fx.alice.Public(), Recipient: fx.bob.Public(),
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Action: "example.ban", Payload: map[string]tce.Value{"target": tce.String("Steve")},
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Message: "Ban Steve", CreatedAt: 1_700_000_000, ExpiresAt: 1_700_000_030,
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Nonce: nonce(4),
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}
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}
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t.Run("fifty-nine second lifetime accepted", func(t *testing.T) {
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r := good()
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r.ExpiresAt = r.CreatedAt + 59
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if _, err := protocol.EncodeApprovalRequest(r); err != nil {
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t.Fatalf("lifetime 59 rejected: %v", err)
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}
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})
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t.Run("exactly sixty seconds accepted", func(t *testing.T) {
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r := good()
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r.ExpiresAt = r.CreatedAt + 60
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if _, err := protocol.EncodeApprovalRequest(r); err != nil {
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t.Fatalf("lifetime 60 rejected: %v", err)
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}
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})
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t.Run("sixty-one seconds rejected", func(t *testing.T) {
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r := good()
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r.ExpiresAt = r.CreatedAt + 61
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if _, err := protocol.EncodeApprovalRequest(r); !errors.Is(err, tce.ErrLifetime) {
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t.Fatalf("err = %v, want ErrLifetime", err)
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}
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})
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t.Run("not after created_at", func(t *testing.T) {
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r := good()
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r.ExpiresAt = r.CreatedAt
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if _, err := protocol.EncodeApprovalRequest(r); !errors.Is(err, tce.ErrExpiry) {
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t.Fatalf("err = %v, want ErrExpiry", err)
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}
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})
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t.Run("action length limit", func(t *testing.T) {
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r := good()
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r.Action = strings.Repeat("a", tce.MaxActionLen+1)
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if _, err := protocol.EncodeApprovalRequest(r); !errors.Is(err, tce.ErrTooLong) {
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t.Fatalf("err = %v, want ErrTooLong", err)
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}
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})
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t.Run("message length limit", func(t *testing.T) {
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r := good()
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r.Message = strings.Repeat("m", tce.MaxMessageLen+1)
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if _, err := protocol.EncodeApprovalRequest(r); !errors.Is(err, tce.ErrTooLong) {
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t.Fatalf("err = %v, want ErrTooLong", err)
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}
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})
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}
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func TestEncodeApprovalResponseRules(t *testing.T) {
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fx := newSignerFixtures(t)
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good := func() *protocol.ApprovalResponse {
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reqID := tce.ComputeID([]byte("request-tce-bytes-for-id"))
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return &protocol.ApprovalResponse{
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RequestHash: reqID, Responder: fx.bob.Public(),
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Decision: protocol.Allow, CreatedAt: 1_700_000_010,
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Nonce: nonce(1),
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}
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}
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t.Run("decision must be allow or deny", func(t *testing.T) {
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r := good()
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r.Decision = protocol.Decision(2)
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if _, err := protocol.EncodeApprovalResponse(r); !errors.Is(err, tce.ErrDecision) {
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t.Fatalf("err = %v, want ErrDecision", err)
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}
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})
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t.Run("both decisions encode", func(t *testing.T) {
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for _, d := range []protocol.Decision{protocol.Deny, protocol.Allow} {
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r := good()
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r.Decision = d
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b, err := protocol.EncodeApprovalResponse(r)
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if err != nil {
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t.Fatalf("decision %s: %v", d, err)
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}
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dec, err := protocol.DecodeApprovalResponse(b)
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if err != nil {
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t.Fatal(err)
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}
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if dec.Decision != d {
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t.Fatalf("decision round trip %s -> %s", d, dec.Decision)
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}
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}
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})
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}
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func TestEncodeIdentityRules(t *testing.T) {
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fx := newSignerFixtures(t)
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good := func() *protocol.Identity {
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return &protocol.Identity{PubKey: fx.alice.Public(), Alias: "alice", CreatedAt: 1_700_000_000}
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}
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t.Run("alias length limit", func(t *testing.T) {
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i := good()
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i.Alias = strings.Repeat("a", tce.MaxAliasLen+1)
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if _, err := protocol.EncodeIdentity(i); !errors.Is(err, tce.ErrTooLong) {
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t.Fatalf("err = %v, want ErrTooLong", err)
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}
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})
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t.Run("empty alias allowed", func(t *testing.T) {
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i := good()
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i.Alias = ""
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b, err := protocol.EncodeIdentity(i)
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if err != nil {
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t.Fatalf("empty alias rejected: %v", err)
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}
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// The empty alias encodes as the single byte 0x00.
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dec, err := protocol.DecodeIdentity(b)
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if err != nil {
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t.Fatal(err)
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}
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if dec.Alias != "" {
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t.Fatalf("alias round trip = %q", dec.Alias)
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}
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})
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t.Run("degenerate key rejected", func(t *testing.T) {
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i := good()
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i.PubKey = make([]byte, 32)
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if _, err := protocol.EncodeIdentity(i); err == nil {
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t.Fatal("registered the degenerate key")
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}
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})
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}
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func TestEncodeAuthAssertionRules(t *testing.T) {
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fx := newSignerFixtures(t)
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challenge := make([]byte, 32)
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for i := range challenge {
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challenge[i] = byte(i)
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}
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good := func() *protocol.AuthAssertion {
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return &protocol.AuthAssertion{
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PubKey: fx.bob.Public(), Challenge: challenge,
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Scope: "ws", Audience: "trust.n1ko.dev", CreatedAt: 1_700_000_000,
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}
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}
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t.Run("challenge length must be 32", func(t *testing.T) {
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a := good()
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a.Challenge = make([]byte, 31)
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if _, err := protocol.EncodeAuthAssertion(a); !errors.Is(err, tce.ErrFieldSize) {
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t.Fatalf("err = %v, want ErrFieldSize", err)
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}
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})
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t.Run("scope length limit", func(t *testing.T) {
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a := good()
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a.Scope = strings.Repeat("s", tce.MaxScopeLen+1)
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if _, err := protocol.EncodeAuthAssertion(a); !errors.Is(err, tce.ErrTooLong) {
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t.Fatalf("err = %v, want ErrTooLong", err)
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}
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})
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t.Run("audience length limit", func(t *testing.T) {
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a := good()
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a.Audience = strings.Repeat("a", tce.MaxAudienceLen+1)
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if _, err := protocol.EncodeAuthAssertion(a); !errors.Is(err, tce.ErrTooLong) {
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t.Fatalf("err = %v, want ErrTooLong", err)
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}
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})
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}
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func TestEncodeRevocationRules(t *testing.T) {
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fx := newSignerFixtures(t)
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good := func() *protocol.Revocation {
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return &protocol.Revocation{
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Issuer: fx.alice.Public(), ClaimID: tce.ComputeID([]byte("claim")),
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Reason: "superseded", CreatedAt: 1_700_000_100, Nonce: nonce(3),
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}
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}
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t.Run("reason length limit", func(t *testing.T) {
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r := good()
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r.Reason = strings.Repeat("r", tce.MaxReasonLen+1)
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if _, err := protocol.EncodeRevocation(r); !errors.Is(err, tce.ErrTooLong) {
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t.Fatalf("err = %v, want ErrTooLong", err)
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}
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})
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t.Run("empty reason allowed", func(t *testing.T) {
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r := good()
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r.Reason = ""
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b, err := protocol.EncodeRevocation(r)
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if err != nil {
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t.Fatalf("empty reason rejected: %v", err)
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}
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if _, err := protocol.DecodeRevocation(b); err != nil {
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t.Fatal(err)
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}
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})
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}
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// rawClaimViaTCE writes a claim directly with the primitive encoder, bypassing
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// the protocol layer's object rules, so the decoder-side enforcement can be
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// exercised on malformed-but-well-typed bytes.
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func rawClaimViaTCE(t *testing.T, issuer, subject []byte, createdAt, expiresAt, serial uint64) []byte {
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t.Helper()
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e := tce.NewEncoder()
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e.Header(tce.TagClaim)
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e.Identity("issuer", issuer)
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e.Identity("subject", subject)
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e.Map("claims", map[string]tce.Value{"k": tce.Bool(true)}, 1)
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e.Timestamp("created_at", createdAt, false)
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e.Timestamp("expires_at", expiresAt, true)
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e.Uvarint(serial)
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e.FixedBytes("nonce", nonce(1), tce.NonceSize)
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b, err := e.Bytes()
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if err != nil {
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t.Fatal(err)
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}
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return b
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}
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func TestDecodeClaimEnforcesObjectRules(t *testing.T) {
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fx := newSignerFixtures(t)
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t.Run("expires_at must be after created_at", func(t *testing.T) {
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ts := uint64(1_700_000_000)
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b := rawClaimViaTCE(t, fx.alice.Public(), fx.bob.Public(), ts, ts, 1)
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if _, err := protocol.DecodeClaim(b); !errors.Is(err, tce.ErrExpiry) {
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t.Fatalf("err = %v, want ErrExpiry", err)
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}
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})
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t.Run("empty claims map rejected", func(t *testing.T) {
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e := tce.NewEncoder()
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e.Header(tce.TagClaim)
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e.Identity("issuer", fx.alice.Public())
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e.Identity("subject", fx.bob.Public())
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e.Map("claims", nil, 1) // ErrEmptyMap fires at encode
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// Encode will already have failed; confirm the decoder path by
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// writing an empty map directly.
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b, err := rawEmptyClaimsClaim(t, fx)
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if err != nil {
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t.Fatal(err)
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}
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if _, err := protocol.DecodeClaim(b); !errors.Is(err, tce.ErrEmptyMap) {
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t.Fatalf("err = %v, want ErrEmptyMap", err)
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}
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})
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t.Run("whole-object limit", func(t *testing.T) {
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// A 4097-byte input pretends to be a claim; it must be refused on
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// size alone before any parsing.
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b := make([]byte, tce.MaxClaimTCE+1)
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b[0] = 0x74
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if _, err := protocol.DecodeClaim(b); !errors.Is(err, tce.ErrObjectTooLarge) {
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t.Fatalf("err = %v, want ErrObjectTooLarge", err)
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}
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})
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}
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func rawEmptyClaimsClaim(t *testing.T, fx *signerFixtures) ([]byte, error) {
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t.Helper()
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// Manually encode a claim with an empty map (count 0x00), which the
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// protocol claims map forbids.
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d := tce.NewEncoder()
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d.Header(tce.TagClaim)
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d.Identity("issuer", fx.alice.Public())
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d.Identity("subject", fx.bob.Public())
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d.Uvarint(0)
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d.Timestamp("created_at", 1_700_000_000, false)
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d.Timestamp("expires_at", 1_700_086_400, true)
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d.Uvarint(1)
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d.FixedBytes("nonce", nonce(1), tce.NonceSize)
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return d.Bytes()
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}
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