Add bambu-nfc dump parse, Key-A HKDF, and spool merge.

Parse filanfc-dump/v1 zip/JSON, Bambu 1K images, and merge stickers by tray UID. dump and mifare packages stay importable for a later common library.

parse_test.go

@@ -0,0 +1,101 @@
+package bambunfc
+
+import (
+	"bytes"
+	"errors"
+	"os"
+	"testing"
+
+	"git.s1d3sw1ped.com/s1d3sw1ped/bambu-nfc/dump"
+)
+
+func TestParseZipFixtures(t *testing.T) {
+	t.Parallel()
+	f, err := os.Open("testdata/dumps.zip")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+	tags, err := ParseZip(f)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(tags) != 6 {
+		t.Fatalf("len(tags) = %d; want 6", len(tags))
+	}
+	var translucent, basic int
+	for _, tag := range tags {
+		if tag.Brand != BrandBambuLab {
+			t.Errorf("chip %s brand %q", tag.ChipUID, tag.Brand)
+		}
+		if tag.DiameterMM != 1.75 {
+			t.Errorf("chip %s diameter %v", tag.ChipUID, tag.DiameterMM)
+		}
+		switch tag.Type {
+		case "PETG Translucent":
+			translucent++
+			if tag.Color.Hex() != "#61B0FF80" {
+				t.Errorf("translucent color %s", tag.Color.Hex())
+			}
+		case "PETG Basic":
+			basic++
+			if tag.Color.Hex() != "#000000FF" {
+				t.Errorf("basic color %s", tag.Color.Hex())
+			}
+		default:
+			t.Errorf("unexpected type %q", tag.Type)
+		}
+	}
+	if translucent != 4 || basic != 2 {
+		t.Errorf("translucent=%d basic=%d", translucent, basic)
+	}
+}
+
+func TestParseImageErrors(t *testing.T) {
+	t.Parallel()
+	raw, err := os.ReadFile("testdata/dumps/e27be276.bin")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := ParseImage("e27be276", raw[:1023], nil); !errors.Is(err, ErrImageSize) {
+		t.Errorf("short image err = %v; want ErrImageSize", err)
+	}
+	if _, err := ParseImage("e27be276", raw, []int{2}); !errors.Is(err, ErrIncomplete) {
+		t.Errorf("fail sector 2 err = %v; want ErrIncomplete", err)
+	}
+	blank := make([]byte, 1024)
+	if _, err := ParseImage("e27be276", blank, nil); !errors.Is(err, ErrNotBambu) {
+		t.Errorf("blank image err = %v; want ErrNotBambu", err)
+	}
+}
+
+func TestParseDumpJSON(t *testing.T) {
+	t.Parallel()
+	f, err := os.Open("testdata/dumps/e27be276.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+	d, err := dump.ParseJSON(f)
+	if err != nil {
+		t.Fatal(err)
+	}
+	tag, err := ParseDump(d)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if tag.TrayUID != "2fb8e0e972084e74bf737393b28e7b12" {
+		t.Errorf("TrayUID = %s", tag.TrayUID)
+	}
+	if tag.ChipUID != "e27be276" {
+		t.Errorf("ChipUID = %s", tag.ChipUID)
+	}
+}
+
+func TestParseImageEmptyUID(t *testing.T) {
+	t.Parallel()
+	_, err := ParseImage("", bytes.Repeat([]byte{1}, 1024), nil)
+	if !errors.Is(err, ErrUID) {
+		t.Errorf("err = %v; want ErrUID", err)
+	}
+}