adding ssh host signing

files/ssh-hostcert/main_test.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestReadHostPubLine(t *testing.T) {
+	dir := t.TempDir()
+	p := dir + "/k.pub"
+	if err := writeFileAtomic(p, []byte("ecdsa-sha2-nistp256 AAAAB3Nz root@fleet\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	line, err := readHostPubLine(p)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if line != "ecdsa-sha2-nistp256 AAAAB3Nz root@fleet" {
+		t.Errorf("got %q", line)
+	}
+	if err := writeFileAtomic(p, []byte("garbage\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := readHostPubLine(p); err == nil {
+		t.Error("expected error on malformed key")
+	}
+}
+
+func TestSplitPrincipals(t *testing.T) {
+	got := splitPrincipals(" a, b ,,c ")
+	if len(got) != 3 || got[0] != "a" || got[1] != "b" || got[2] != "c" {
+		t.Errorf("got %v", got)
+	}
+	if len(splitPrincipals("")) != 0 {
+		t.Error("empty string should yield no principals")
+	}
+}
+
+func TestParseHandle(t *testing.T) {
+	h, err := parseHandle("0x81000100")
+	if err != nil || uint32(h) != 0x81000100 {
+		t.Fatalf("h=%#x err=%v", uint32(h), err)
+	}
+	if _, err := parseHandle("nothex"); err == nil {
+		t.Error("expected error")
+	}
+}
+
+func TestRequestHostCert(t *testing.T) {
+	const certLine = "ecdsa-sha2-nistp256-cert-v01@openssh.com AAAAcert host.fleet.lab"
+	var gotReq hostCertRequest
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		defer r.Body.Close()
+		raw, _ := io.ReadAll(r.Body)
+		_ = json.Unmarshal(raw, &gotReq)
+		writeJSON(w, http.StatusOK, hostCertResponse{Cert: certLine})
+	}))
+	defer srv.Close()
+
+	got, err := requestHostCert(srv.Client(), srv.URL, "ecdsa-sha2-nistp256 AAAA host", []string{"host", "host.fleet.lab"}, "host.fleet.lab")
+	if err != nil {
+		t.Fatalf("requestHostCert: %v", err)
+	}
+	if got != certLine {
+		t.Errorf("cert = %q", got)
+	}
+	if gotReq.PublicKey != "ecdsa-sha2-nistp256 AAAA host" || gotReq.KeyID != "host.fleet.lab" || len(gotReq.Principals) != 2 {
+		t.Errorf("broker received unexpected request: %+v", gotReq)
+	}
+}
+
+func TestRequestHostCertErrorBody(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		writeJSON(w, http.StatusForbidden, hostCertResponse{Error: "not enrolled"})
+	}))
+	defer srv.Close()
+	if _, err := requestHostCert(srv.Client(), srv.URL, "ecdsa-sha2-nistp256 AAAA host", []string{"host"}, "host"); err == nil || !strings.Contains(err.Error(), "not enrolled") {
+		t.Errorf("want error carrying broker message, got %v", err)
+	}
+}
+
+// writeJSON mirrors the broker's small JSON helper for the test server.
+func writeJSON(w http.ResponseWriter, code int, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(code)
+	_ = json.NewEncoder(w).Encode(v)
+}