wip: migrate to mono-repo. SPN has already been moved to spn/

spn/access/token/token.go

@@ -0,0 +1,83 @@
+package token
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/mr-tron/base58"
+
+	"github.com/safing/portbase/container"
+)
+
+// Token represents a token, consisting of a zone (name) and some data.
+type Token struct {
+	Zone string
+	Data []byte
+}
+
+// GetToken returns a token of the given zone.
+func GetToken(zone string) (*Token, error) {
+	handler, ok := GetHandler(zone)
+	if !ok {
+		return nil, ErrZoneUnknown
+	}
+
+	return handler.GetToken()
+}
+
+// VerifyToken verifies the given token.
+func VerifyToken(token *Token) error {
+	handler, ok := GetHandler(token.Zone)
+	if !ok {
+		return ErrZoneUnknown
+	}
+
+	return handler.Verify(token)
+}
+
+// Raw returns the raw format of the token.
+func (c *Token) Raw() []byte {
+	cont := container.New()
+	cont.Append([]byte(c.Zone))
+	cont.Append([]byte(":"))
+	cont.Append(c.Data)
+	return cont.CompileData()
+}
+
+// String returns the stringified format of the token.
+func (c *Token) String() string {
+	return c.Zone + ":" + base58.Encode(c.Data)
+}
+
+// ParseRawToken parses a raw token.
+func ParseRawToken(code []byte) (*Token, error) {
+	splitted := bytes.SplitN(code, []byte(":"), 2)
+	if len(splitted) < 2 {
+		return nil, errors.New("invalid code format: zone/data separator missing")
+	}
+
+	return &Token{
+		Zone: string(splitted[0]),
+		Data: splitted[1],
+	}, nil
+}
+
+// ParseToken parses a stringified token.
+func ParseToken(code string) (*Token, error) {
+	splitted := strings.SplitN(code, ":", 2)
+	if len(splitted) < 2 {
+		return nil, errors.New("invalid code format: zone/data separator missing")
+	}
+
+	data, err := base58.Decode(splitted[1])
+	if err != nil {
+		return nil, fmt.Errorf("invalid code format: %w", err)
+	}
+
+	return &Token{
+		Zone: splitted[0],
+		Data: data,
+	}, nil
+}