| 1 | package catalog |
| 2 | |
| 3 | import ( |
| 4 | "database/sql" |
| 5 | "encoding/hex" |
| 6 | "errors" |
| 7 | "fmt" |
| 8 | "net" |
| 9 | "net/url" |
| 10 | "regexp" |
| 11 | "strings" |
| 12 | ) |
| 13 | |
| 14 | var labelPattern = regexp.MustCompile(`^[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$` ) |
| 15 | |
| 16 | func normalizeName(name string) (string, error) { |
| 17 | name = strings.TrimSpace(name) |
| 18 | if name == "" || len(name) > 128 || strings.ContainsAny(name, "/\\" ) || hasControl(name) { |
| 19 | return "" , errors.New("tenant name must be non-empty, safe, and at most 128 characters" ) |
| 20 | } |
| 21 | return name, nil |
| 22 | } |
| 23 | |
| 24 | func normalizeOwner(owner string) (string, error) { |
| 25 | if len(owner) != 64 || owner != strings.ToLower(owner) { |
| 26 | return "" , errors.New("owner must be a lowercase 32-byte hex public key" ) |
| 27 | } |
| 28 | decoded, err := hex.DecodeString(owner) |
| 29 | if err != nil || len(decoded) != 32 { |
| 30 | return "" , errors.New("owner must be a lowercase 32-byte hex public key" ) |
| 31 | } |
| 32 | return owner, nil |
| 33 | } |
| 34 | |
| 35 | func normalizeTemplate(template string) (string, error) { |
| 36 | template = strings.TrimSpace(template) |
| 37 | if template == "" { |
| 38 | return "default" , nil |
| 39 | } |
| 40 | if len(template) > 64 || strings.ContainsAny(template, "/\\" ) || hasControl(template) { |
| 41 | return "" , errors.New("tenant template must be safe and at most 64 characters" ) |
| 42 | } |
| 43 | return template, nil |
| 44 | } |
| 45 | |
| 46 | func normalizeSource(source string) (string, error) { |
| 47 | source = strings.TrimSpace(source) |
| 48 | if source == "" { |
| 49 | return "" , nil |
| 50 | } |
| 51 | u, err := url.Parse(source) |
| 52 | if err != nil || u.Host == "" || (u.Scheme != "http" && u.Scheme != "https" && u.Scheme != "ws" && u.Scheme != "wss" ) || u.User != nil { |
| 53 | return "" , errors.New("source must be an http, https, ws, or wss relay URL" ) |
| 54 | } |
| 55 | return source, nil |
| 56 | } |
| 57 | |
| 58 | func normalizeHost(host string) (string, error) { |
| 59 | host = strings.TrimSuffix(strings.ToLower(strings.TrimSpace(host)), "." ) |
| 60 | if host == "" || len(host) > 253 || strings.ContainsAny(host, "/\\:@?#" ) || hasControl(host) { |
| 61 | return "" , errors.New("hostname must be a normalized DNS name" ) |
| 62 | } |
| 63 | if net.ParseIP(host) != nil { |
| 64 | return host, nil |
| 65 | } |
| 66 | for _, label := range strings.Split(host, "." ) { |
| 67 | if !labelPattern.MatchString(label) { |
| 68 | return "" , fmt.Errorf("invalid hostname label %q" , label) |
| 69 | } |
| 70 | } |
| 71 | return host, nil |
| 72 | } |
| 73 | |
| 74 | func hasControl(value string) bool { |
| 75 | for _, r := range value { |
| 76 | if r < 0x20 || r == 0x7f { |
| 77 | return true |
| 78 | } |
| 79 | } |
| 80 | return false |
| 81 | } |
| 82 | |
| 83 | func isConstraint(err error) bool { |
| 84 | return strings.Contains(strings.ToLower(err.Error()), "constraint" ) || errors.Is(err, sql.ErrNoRows) |
| 85 | } |