diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/kerb_validation_info.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/kerb_validation_info.go
new file mode 100644
index 0000000..9dd69d2
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/kerb_validation_info.go
@@ -0,0 +1,115 @@
+// Package pac implements Microsoft Privilege Attribute Certificate (PAC) processing.
+package pac
+
+import (
+	"bytes"
+	"fmt"
+
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+	"gopkg.in/jcmturner/rpc.v1/ndr"
+)
+
+// KERB_VALIDATION_INFO flags.
+const (
+	USERFLAG_GUEST                                    = 31 // Authentication was done via the GUEST account; no password was used.
+	USERFLAG_NO_ENCRYPTION_AVAILABLE                  = 30 // No encryption is available.
+	USERFLAG_LAN_MANAGER_KEY                          = 28 // LAN Manager key was used for authentication.
+	USERFLAG_SUB_AUTH                                 = 25 // Sub-authentication used; session key came from the sub-authentication package.
+	USERFLAG_EXTRA_SIDS                               = 26 // Indicates that the ExtraSids field is populated and contains additional SIDs.
+	USERFLAG_MACHINE_ACCOUNT                          = 24 // Indicates that the account is a machine account.
+	USERFLAG_DC_NTLM2                                 = 23 // Indicates that the domain controller understands NTLMv2.
+	USERFLAG_RESOURCE_GROUPIDS                        = 22 // Indicates that the ResourceGroupIds field is populated.
+	USERFLAG_PROFILEPATH                              = 21 // Indicates that ProfilePath is populated.
+	USERFLAG_NTLM2_NTCHALLENGERESP                    = 20 // The NTLMv2 response from the NtChallengeResponseFields ([MS-NLMP] section 2.2.1.3) was used for authentication and session key generation.
+	USERFLAG_LM2_LMCHALLENGERESP                      = 19 // The LMv2 response from the LmChallengeResponseFields ([MS-NLMP] section 2.2.1.3) was used for authentication and session key generation.
+	USERFLAG_AUTH_LMCHALLENGERESP_KEY_NTCHALLENGERESP = 18 // The LMv2 response from the LmChallengeResponseFields ([MS-NLMP] section 2.2.1.3) was used for authentication and the NTLMv2 response from the NtChallengeResponseFields ([MS-NLMP] section 2.2.1.3) was used session key generation.
+)
+
+// KerbValidationInfo implement https://msdn.microsoft.com/en-us/library/cc237948.aspx
+// The KERB_VALIDATION_INFO structure defines the user's logon and authorization information
+// provided by the DC. The KERB_VALIDATION_INFO structure is a subset of the
+// NETLOGON_VALIDATION_SAM_INFO4 structure ([MS-NRPC] section 2.2.1.4.13).
+// It is a subset due to historical reasons and to the use of the common Active Directory to generate this information.
+// The KERB_VALIDATION_INFO structure is marshaled by RPC [MS-RPCE].
+type KerbValidationInfo struct {
+	LogOnTime              mstypes.FileTime
+	LogOffTime             mstypes.FileTime
+	KickOffTime            mstypes.FileTime
+	PasswordLastSet        mstypes.FileTime
+	PasswordCanChange      mstypes.FileTime
+	PasswordMustChange     mstypes.FileTime
+	EffectiveName          mstypes.RPCUnicodeString
+	FullName               mstypes.RPCUnicodeString
+	LogonScript            mstypes.RPCUnicodeString
+	ProfilePath            mstypes.RPCUnicodeString
+	HomeDirectory          mstypes.RPCUnicodeString
+	HomeDirectoryDrive     mstypes.RPCUnicodeString
+	LogonCount             uint16
+	BadPasswordCount       uint16
+	UserID                 uint32
+	PrimaryGroupID         uint32
+	GroupCount             uint32
+	GroupIDs               []mstypes.GroupMembership `ndr:"pointer,conformant"`
+	UserFlags              uint32
+	UserSessionKey         mstypes.UserSessionKey
+	LogonServer            mstypes.RPCUnicodeString
+	LogonDomainName        mstypes.RPCUnicodeString
+	LogonDomainID          mstypes.RPCSID `ndr:"pointer"`
+	Reserved1              [2]uint32      // Has 2 elements
+	UserAccountControl     uint32
+	SubAuthStatus          uint32
+	LastSuccessfulILogon   mstypes.FileTime
+	LastFailedILogon       mstypes.FileTime
+	FailedILogonCount      uint32
+	Reserved3              uint32
+	SIDCount               uint32
+	ExtraSIDs              []mstypes.KerbSidAndAttributes `ndr:"pointer,conformant"`
+	ResourceGroupDomainSID mstypes.RPCSID                 `ndr:"pointer"`
+	ResourceGroupCount     uint32
+	ResourceGroupIDs       []mstypes.GroupMembership `ndr:"pointer,conformant"`
+}
+
+// Unmarshal bytes into the DeviceInfo struct
+func (k *KerbValidationInfo) Unmarshal(b []byte) (err error) {
+	dec := ndr.NewDecoder(bytes.NewReader(b))
+	err = dec.Decode(k)
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling KerbValidationInfo: %v", err)
+	}
+	return
+}
+
+// GetGroupMembershipSIDs returns a slice of strings containing the group membership SIDs found in the PAC.
+func (k *KerbValidationInfo) GetGroupMembershipSIDs() []string {
+	var g []string
+	lSID := k.LogonDomainID.String()
+	for i := range k.GroupIDs {
+		g = append(g, fmt.Sprintf("%s-%d", lSID, k.GroupIDs[i].RelativeID))
+	}
+	for _, s := range k.ExtraSIDs {
+		var exists = false
+		for _, es := range g {
+			if es == s.SID.String() {
+				exists = true
+				break
+			}
+		}
+		if !exists {
+			g = append(g, s.SID.String())
+		}
+	}
+	for _, r := range k.ResourceGroupIDs {
+		var exists = false
+		s := fmt.Sprintf("%s-%d", k.ResourceGroupDomainSID.String(), r.RelativeID)
+		for _, es := range g {
+			if es == s {
+				exists = true
+				break
+			}
+		}
+		if !exists {
+			g = append(g, s)
+		}
+	}
+	return g
+}