Test data: security_cms.json labeled with SpecVersion, and the fuzzing of CMS and DER

security_cms.json says 0.11, as every file of testdata, until SpecVersion
moves with the approval of the draft v0.12 whose verdicts it gives; its test
checks SpecVersion. scripts/fuzz.sh runs FuzzDERCheck, FuzzParseSignature,
FuzzParseToken and FuzzParseCert.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

capsule/cmsvectors_test.go

@@ -9,6 +9,7 @@ import (
 	"testing"
 	"time"
 
+	datekeys "g.activething.com/go/DateKeys"
 	"g.activething.com/go/DateKeys/capsule"
 	"g.activething.com/go/DateKeys/internal/testkit"
 )
@@ -22,7 +23,7 @@ func TestCMSVectors(t *testing.T) {
 	if err := testkit.ReadJSON(filepath.Join("..", "testdata", "vectors", "security_cms.json"), &f); err != nil {
 		t.Fatal(err)
 	}
-	if f.Spec != "0.12" || !strings.Contains(f.Description, "v0.12") || len(f.Cases) < 100 {
+	if f.Spec != datekeys.SpecVersion || !strings.Contains(f.Description, "v0.12") || len(f.Cases) < 100 {
 		t.Fatalf("spec %q, %d cases: %s", f.Spec, len(f.Cases), f.Description)
 	}
 	seen := map[string]bool{}

internal/testkit/genfixtures/cmsvectors.go

@@ -58,10 +58,11 @@ var (
 	vecSigned = time.Date(2026, 9, 30, 12, 0, 0, 0, time.UTC)
 )
 
-// cmsVectorSpec is the version of the spec whose verdicts security_cms.json
+// cmsVectorSpec labels security_cms.json, as every file of testdata, with
-// gives: the draft v0.12, with the profile of the certificate of §29.10 and
+// SpecVersion. Its verdicts are those of the draft v0.12, with the profile of
-// the texts of §29.7.
+// the certificate of §29.10 and the texts of §29.7, which this branch
-const cmsVectorSpec = "0.12"
+// implements: SpecVersion becomes 0.12 when the draft is approved.
+const cmsVectorSpec = testkit.SpecVersion
 
 func hex32(b [32]byte) string { return hex.EncodeToString(b[:]) }
 

scripts/fuzz.sh

@@ -31,6 +31,10 @@ targets=(
   "./locator FuzzUnmarshal"
   "./locator FuzzParseInfo"
   "./locator FuzzCheckURI"
+  "./internal/der FuzzDERCheck"
+  "./internal/cms FuzzParseSignature"
+  "./internal/cms FuzzParseToken"
+  "./internal/cms FuzzParseCert"
   "./capsule FuzzInspect"
   "./capsule FuzzEncodeImpliesDecode"
 )

testdata/vectors/security_cms.json

@@ -1,6 +1,6 @@
 {
   "description": "SECURITY_CBOR with an author signature of alg 2 or a time seal of seal_type 2, the context of its capsule, and the verdicts, the result of each signer and the lines of spec v0.12 29.7, 29.10 and 29.11. Certificates and tokens are made once with test keys and the file is frozen. See testdata/README.md.",
-  "spec": "0.12",
+  "spec": "0.11",
   "cases": [
     {
       "name": "alg 2: two signers, each sealed before the round time: F6",