diff --git a/vendor/github.com/jcmturner/gokrb5/v8/types/Cryptosystem.go b/vendor/github.com/jcmturner/gokrb5/v8/types/Cryptosystem.go
new file mode 100644
index 0000000..2f354ea
--- /dev/null
+++ b/vendor/github.com/jcmturner/gokrb5/v8/types/Cryptosystem.go
@@ -0,0 +1,72 @@
+package types
+
+import (
+	"crypto/rand"
+
+	"github.com/jcmturner/gofork/encoding/asn1"
+	"github.com/jcmturner/gokrb5/v8/crypto/etype"
+)
+
+// Reference: https://www.ietf.org/rfc/rfc4120.txt
+// Section: 5.2.9
+
+// EncryptedData implements RFC 4120 type: https://tools.ietf.org/html/rfc4120#section-5.2.9
+type EncryptedData struct {
+	EType  int32  `asn1:"explicit,tag:0"`
+	KVNO   int    `asn1:"explicit,optional,tag:1"`
+	Cipher []byte `asn1:"explicit,tag:2"`
+}
+
+// EncryptionKey implements RFC 4120 type: https://tools.ietf.org/html/rfc4120#section-5.2.9
+// AKA KeyBlock
+type EncryptionKey struct {
+	KeyType  int32  `asn1:"explicit,tag:0"`
+	KeyValue []byte `asn1:"explicit,tag:1" json:"-"`
+}
+
+// Checksum implements RFC 4120 type: https://tools.ietf.org/html/rfc4120#section-5.2.9
+type Checksum struct {
+	CksumType int32  `asn1:"explicit,tag:0"`
+	Checksum  []byte `asn1:"explicit,tag:1"`
+}
+
+// Unmarshal bytes into the EncryptedData.
+func (a *EncryptedData) Unmarshal(b []byte) error {
+	_, err := asn1.Unmarshal(b, a)
+	return err
+}
+
+// Marshal the EncryptedData.
+func (a *EncryptedData) Marshal() ([]byte, error) {
+	edb, err := asn1.Marshal(*a)
+	if err != nil {
+		return edb, err
+	}
+	return edb, nil
+}
+
+// Unmarshal bytes into the EncryptionKey.
+func (a *EncryptionKey) Unmarshal(b []byte) error {
+	_, err := asn1.Unmarshal(b, a)
+	return err
+}
+
+// Unmarshal bytes into the Checksum.
+func (a *Checksum) Unmarshal(b []byte) error {
+	_, err := asn1.Unmarshal(b, a)
+	return err
+}
+
+// GenerateEncryptionKey creates a new EncryptionKey with a random key value.
+func GenerateEncryptionKey(etype etype.EType) (EncryptionKey, error) {
+	k := EncryptionKey{
+		KeyType: etype.GetETypeID(),
+	}
+	b := make([]byte, etype.GetKeyByteSize(), etype.GetKeyByteSize())
+	_, err := rand.Read(b)
+	if err != nil {
+		return k, err
+	}
+	k.KeyValue = b
+	return k, nil
+}