diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/client_claims.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/client_claims.go
new file mode 100644
index 0000000..612979e
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/client_claims.go
@@ -0,0 +1,33 @@
+package pac
+
+import (
+	"bytes"
+	"fmt"
+
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+	"gopkg.in/jcmturner/rpc.v1/ndr"
+)
+
+// Claims reference: https://msdn.microsoft.com/en-us/library/hh553895.aspx
+
+// ClientClaimsInfo implements https://msdn.microsoft.com/en-us/library/hh536365.aspx
+type ClientClaimsInfo struct {
+	ClaimsSetMetadata mstypes.ClaimsSetMetadata
+	ClaimsSet         mstypes.ClaimsSet
+}
+
+// Unmarshal bytes into the ClientClaimsInfo struct
+func (k *ClientClaimsInfo) Unmarshal(b []byte) (err error) {
+	dec := ndr.NewDecoder(bytes.NewReader(b))
+	m := new(mstypes.ClaimsSetMetadata)
+	err = dec.Decode(m)
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling ClientClaimsInfo ClaimsSetMetadata: %v", err)
+	}
+	k.ClaimsSetMetadata = *m
+	k.ClaimsSet, err = k.ClaimsSetMetadata.ClaimsSet()
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling ClientClaimsInfo ClaimsSet: %v", err)
+	}
+	return
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/client_info.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/client_info.go
new file mode 100644
index 0000000..ad5212d
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/client_info.go
@@ -0,0 +1,31 @@
+package pac
+
+import (
+	"bytes"
+
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+)
+
+// ClientInfo implements https://msdn.microsoft.com/en-us/library/cc237951.aspx
+type ClientInfo struct {
+	ClientID   mstypes.FileTime // A FILETIME structure in little-endian format that contains the Kerberos initial ticket-granting ticket TGT authentication time
+	NameLength uint16           // An unsigned 16-bit integer in little-endian format that specifies the length, in bytes, of the Name field.
+	Name       string           // An array of 16-bit Unicode characters in little-endian format that contains the client's account name.
+}
+
+// Unmarshal bytes into the ClientInfo struct
+func (k *ClientInfo) Unmarshal(b []byte) (err error) {
+	//The PAC_CLIENT_INFO structure is a simple structure that is not NDR-encoded.
+	r := mstypes.NewReader(bytes.NewReader(b))
+
+	k.ClientID, err = r.FileTime()
+	if err != nil {
+		return
+	}
+	k.NameLength, err = r.Uint16()
+	if err != nil {
+		return
+	}
+	k.Name, err = r.UTF16String(int(k.NameLength))
+	return
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/credentials_info.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/credentials_info.go
new file mode 100644
index 0000000..a8c2c3c
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/credentials_info.go
@@ -0,0 +1,86 @@
+package pac
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+
+	"gopkg.in/jcmturner/gokrb5.v7/crypto"
+	"gopkg.in/jcmturner/gokrb5.v7/iana/keyusage"
+	"gopkg.in/jcmturner/gokrb5.v7/types"
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+	"gopkg.in/jcmturner/rpc.v1/ndr"
+)
+
+// https://msdn.microsoft.com/en-us/library/cc237931.aspx
+
+// CredentialsInfo implements https://msdn.microsoft.com/en-us/library/cc237953.aspx
+type CredentialsInfo struct {
+	Version                    uint32 // A 32-bit unsigned integer in little-endian format that defines the version. MUST be 0x00000000.
+	EType                      uint32
+	PACCredentialDataEncrypted []byte // Key usage number for encryption: KERB_NON_KERB_SALT (16)
+	PACCredentialData          CredentialData
+}
+
+// Unmarshal bytes into the CredentialsInfo struct
+func (c *CredentialsInfo) Unmarshal(b []byte, k types.EncryptionKey) (err error) {
+	//The CredentialsInfo structure is a simple structure that is not NDR-encoded.
+	r := mstypes.NewReader(bytes.NewReader(b))
+
+	c.Version, err = r.Uint32()
+	if err != nil {
+		return
+	}
+	if c.Version != 0 {
+		err = errors.New("credentials info version is not zero")
+		return
+	}
+	c.EType, err = r.Uint32()
+	if err != nil {
+		return
+	}
+	c.PACCredentialDataEncrypted, err = r.ReadBytes(len(b) - 8)
+
+	err = c.DecryptEncPart(k)
+	if err != nil {
+		err = fmt.Errorf("error decrypting PAC Credentials Data: %v", err)
+		return
+	}
+	return
+}
+
+// DecryptEncPart decrypts the encrypted part of the CredentialsInfo.
+func (c *CredentialsInfo) DecryptEncPart(k types.EncryptionKey) error {
+	if k.KeyType != int32(c.EType) {
+		return fmt.Errorf("key provided is not the correct type. Type needed: %d, type provided: %d", c.EType, k.KeyType)
+	}
+	pt, err := crypto.DecryptMessage(c.PACCredentialDataEncrypted, k, keyusage.KERB_NON_KERB_SALT)
+	if err != nil {
+		return err
+	}
+	err = c.PACCredentialData.Unmarshal(pt)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// CredentialData implements https://msdn.microsoft.com/en-us/library/cc237952.aspx
+// This structure is encrypted prior to being encoded in any other structures.
+// Encryption is performed by first serializing the data structure via Network Data Representation (NDR) encoding, as specified in [MS-RPCE].
+// Once serialized, the data is encrypted using the key and cryptographic system selected through the AS protocol and the KRB_AS_REP message
+// Fields (for capturing this information) and cryptographic parameters are specified in PAC_CREDENTIAL_INFO (section 2.6.1).
+type CredentialData struct {
+	CredentialCount uint32
+	Credentials     []SECPKGSupplementalCred // Size is the value of CredentialCount
+}
+
+// Unmarshal converts the bytes provided into a CredentialData type.
+func (c *CredentialData) Unmarshal(b []byte) (err error) {
+	dec := ndr.NewDecoder(bytes.NewReader(b))
+	err = dec.Decode(c)
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling KerbValidationInfo: %v", err)
+	}
+	return
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/device_claims.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/device_claims.go
new file mode 100644
index 0000000..c2299bb
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/device_claims.go
@@ -0,0 +1,33 @@
+package pac
+
+import (
+	"bytes"
+	"fmt"
+
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+	"gopkg.in/jcmturner/rpc.v1/ndr"
+)
+
+// Claims reference: https://msdn.microsoft.com/en-us/library/hh553895.aspx
+
+// DeviceClaimsInfo implements https://msdn.microsoft.com/en-us/library/hh554226.aspx
+type DeviceClaimsInfo struct {
+	ClaimsSetMetadata mstypes.ClaimsSetMetadata
+	ClaimsSet         mstypes.ClaimsSet
+}
+
+// Unmarshal bytes into the ClientClaimsInfo struct
+func (k *DeviceClaimsInfo) Unmarshal(b []byte) (err error) {
+	dec := ndr.NewDecoder(bytes.NewReader(b))
+	m := new(mstypes.ClaimsSetMetadata)
+	err = dec.Decode(m)
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling ClientClaimsInfo ClaimsSetMetadata: %v", err)
+	}
+	k.ClaimsSetMetadata = *m
+	k.ClaimsSet, err = k.ClaimsSetMetadata.ClaimsSet()
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling ClientClaimsInfo ClaimsSet: %v", err)
+	}
+	return
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/device_info.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/device_info.go
new file mode 100644
index 0000000..51be207
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/device_info.go
@@ -0,0 +1,32 @@
+package pac
+
+import (
+	"bytes"
+	"fmt"
+
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+	"gopkg.in/jcmturner/rpc.v1/ndr"
+)
+
+// DeviceInfo implements https://msdn.microsoft.com/en-us/library/hh536402.aspx
+type DeviceInfo struct {
+	UserID            uint32                          // A 32-bit unsigned integer that contains the RID of the account. If the UserId member equals 0x00000000, the first group SID in this member is the SID for this account.
+	PrimaryGroupID    uint32                          // A 32-bit unsigned integer that contains the RID for the primary group to which this account belongs.
+	AccountDomainID   mstypes.RPCSID                  `ndr:"pointer"` // A SID structure that contains the SID for the domain of the account.This member is used in conjunction with the UserId, and GroupIds members to create the user and group SIDs for the client.
+	AccountGroupCount uint32                          // A 32-bit unsigned integer that contains the number of groups within the account domain to which the account belongs
+	AccountGroupIDs   []mstypes.GroupMembership       `ndr:"pointer,conformant"` // A pointer to a list of GROUP_MEMBERSHIP (section 2.2.2) structures that contains the groups to which the account belongs in the account domain. The number of groups in this list MUST be equal to GroupCount.
+	SIDCount          uint32                          // A 32-bit unsigned integer that contains the total number of SIDs present in the ExtraSids member.
+	ExtraSIDs         []mstypes.KerbSidAndAttributes  `ndr:"pointer,conformant"` // A pointer to a list of KERB_SID_AND_ATTRIBUTES structures that contain a list of SIDs corresponding to groups not in domains. If the UserId member equals 0x00000000, the first group SID in this member is the SID for this account.
+	DomainGroupCount  uint32                          // A 32-bit unsigned integer that contains the number of domains with groups to which the account belongs.
+	DomainGroup       []mstypes.DomainGroupMembership `ndr:"pointer,conformant"` // A pointer to a list of DOMAIN_GROUP_MEMBERSHIP structures (section 2.2.3) that contains the domains to which the account belongs to a group. The number of sets in this list MUST be equal to DomainCount.
+}
+
+// Unmarshal bytes into the DeviceInfo struct
+func (k *DeviceInfo) Unmarshal(b []byte) (err error) {
+	dec := ndr.NewDecoder(bytes.NewReader(b))
+	err = dec.Decode(k)
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling DeviceInfo: %v", err)
+	}
+	return
+}
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
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/pac_type.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/pac_type.go
new file mode 100644
index 0000000..c73fd06
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/pac_type.go
@@ -0,0 +1,251 @@
+package pac
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"log"
+
+	"gopkg.in/jcmturner/gokrb5.v7/crypto"
+	"gopkg.in/jcmturner/gokrb5.v7/iana/keyusage"
+	"gopkg.in/jcmturner/gokrb5.v7/types"
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+)
+
+const (
+	infoTypeKerbValidationInfo     uint32 = 1
+	infoTypeCredentials            uint32 = 2
+	infoTypePACServerSignatureData uint32 = 6
+	infoTypePACKDCSignatureData    uint32 = 7
+	infoTypePACClientInfo          uint32 = 10
+	infoTypeS4UDelegationInfo      uint32 = 11
+	infoTypeUPNDNSInfo             uint32 = 12
+	infoTypePACClientClaimsInfo    uint32 = 13
+	infoTypePACDeviceInfo          uint32 = 14
+	infoTypePACDeviceClaimsInfo    uint32 = 15
+)
+
+// PACType implements: https://msdn.microsoft.com/en-us/library/cc237950.aspx
+type PACType struct {
+	CBuffers           uint32
+	Version            uint32
+	Buffers            []InfoBuffer
+	Data               []byte
+	KerbValidationInfo *KerbValidationInfo
+	CredentialsInfo    *CredentialsInfo
+	ServerChecksum     *SignatureData
+	KDCChecksum        *SignatureData
+	ClientInfo         *ClientInfo
+	S4UDelegationInfo  *S4UDelegationInfo
+	UPNDNSInfo         *UPNDNSInfo
+	ClientClaimsInfo   *ClientClaimsInfo
+	DeviceInfo         *DeviceInfo
+	DeviceClaimsInfo   *DeviceClaimsInfo
+	ZeroSigData        []byte
+}
+
+// InfoBuffer implements the PAC Info Buffer: https://msdn.microsoft.com/en-us/library/cc237954.aspx
+type InfoBuffer struct {
+	ULType       uint32 // A 32-bit unsigned integer in little-endian format that describes the type of data present in the buffer contained at Offset.
+	CBBufferSize uint32 // A 32-bit unsigned integer in little-endian format that contains the size, in bytes, of the buffer in the PAC located at Offset.
+	Offset       uint64 // A 64-bit unsigned integer in little-endian format that contains the offset to the beginning of the buffer, in bytes, from the beginning of the PACTYPE structure. The data offset MUST be a multiple of eight. The following sections specify the format of each type of element.
+}
+
+// Unmarshal bytes into the PACType struct
+func (pac *PACType) Unmarshal(b []byte) (err error) {
+	pac.Data = b
+	zb := make([]byte, len(b), len(b))
+	copy(zb, b)
+	pac.ZeroSigData = zb
+	r := mstypes.NewReader(bytes.NewReader(b))
+	pac.CBuffers, err = r.Uint32()
+	if err != nil {
+		return
+	}
+	pac.Version, err = r.Uint32()
+	if err != nil {
+		return
+	}
+	buf := make([]InfoBuffer, pac.CBuffers, pac.CBuffers)
+	for i := range buf {
+		buf[i].ULType, err = r.Uint32()
+		if err != nil {
+			return
+		}
+		buf[i].CBBufferSize, err = r.Uint32()
+		if err != nil {
+			return
+		}
+		buf[i].Offset, err = r.Uint64()
+		if err != nil {
+			return
+		}
+	}
+	pac.Buffers = buf
+	return nil
+}
+
+// ProcessPACInfoBuffers processes the PAC Info Buffers.
+// https://msdn.microsoft.com/en-us/library/cc237954.aspx
+func (pac *PACType) ProcessPACInfoBuffers(key types.EncryptionKey, l *log.Logger) error {
+	for _, buf := range pac.Buffers {
+		p := make([]byte, buf.CBBufferSize, buf.CBBufferSize)
+		copy(p, pac.Data[int(buf.Offset):int(buf.Offset)+int(buf.CBBufferSize)])
+		switch buf.ULType {
+		case infoTypeKerbValidationInfo:
+			if pac.KerbValidationInfo != nil {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k KerbValidationInfo
+			err := k.Unmarshal(p)
+			if err != nil {
+				return fmt.Errorf("error processing KerbValidationInfo: %v", err)
+			}
+			pac.KerbValidationInfo = &k
+		case infoTypeCredentials:
+			// Currently PAC parsing is only useful on the service side in gokrb5
+			// The CredentialsInfo are only useful when gokrb5 has implemented RFC4556 and only applied on the client side.
+			// Skipping CredentialsInfo - will be revisited under RFC4556 implementation.
+			continue
+			//if pac.CredentialsInfo != nil {
+			//	//Must ignore subsequent buffers of this type
+			//	continue
+			//}
+			//var k CredentialsInfo
+			//err := k.Unmarshal(p, key) // The encryption key used is the AS reply key only available to the client.
+			//if err != nil {
+			//	return fmt.Errorf("error processing CredentialsInfo: %v", err)
+			//}
+			//pac.CredentialsInfo = &k
+		case infoTypePACServerSignatureData:
+			if pac.ServerChecksum != nil {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k SignatureData
+			zb, err := k.Unmarshal(p)
+			copy(pac.ZeroSigData[int(buf.Offset):int(buf.Offset)+int(buf.CBBufferSize)], zb)
+			if err != nil {
+				return fmt.Errorf("error processing ServerChecksum: %v", err)
+			}
+			pac.ServerChecksum = &k
+		case infoTypePACKDCSignatureData:
+			if pac.KDCChecksum != nil {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k SignatureData
+			zb, err := k.Unmarshal(p)
+			copy(pac.ZeroSigData[int(buf.Offset):int(buf.Offset)+int(buf.CBBufferSize)], zb)
+			if err != nil {
+				return fmt.Errorf("error processing KDCChecksum: %v", err)
+			}
+			pac.KDCChecksum = &k
+		case infoTypePACClientInfo:
+			if pac.ClientInfo != nil {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k ClientInfo
+			err := k.Unmarshal(p)
+			if err != nil {
+				return fmt.Errorf("error processing ClientInfo: %v", err)
+			}
+			pac.ClientInfo = &k
+		case infoTypeS4UDelegationInfo:
+			if pac.S4UDelegationInfo != nil {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k S4UDelegationInfo
+			err := k.Unmarshal(p)
+			if err != nil {
+				l.Printf("could not process S4U_DelegationInfo: %v", err)
+				continue
+			}
+			pac.S4UDelegationInfo = &k
+		case infoTypeUPNDNSInfo:
+			if pac.UPNDNSInfo != nil {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k UPNDNSInfo
+			err := k.Unmarshal(p)
+			if err != nil {
+				l.Printf("could not process UPN_DNSInfo: %v", err)
+				continue
+			}
+			pac.UPNDNSInfo = &k
+		case infoTypePACClientClaimsInfo:
+			if pac.ClientClaimsInfo != nil || len(p) < 1 {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k ClientClaimsInfo
+			err := k.Unmarshal(p)
+			if err != nil {
+				l.Printf("could not process ClientClaimsInfo: %v", err)
+				continue
+			}
+			pac.ClientClaimsInfo = &k
+		case infoTypePACDeviceInfo:
+			if pac.DeviceInfo != nil {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k DeviceInfo
+			err := k.Unmarshal(p)
+			if err != nil {
+				l.Printf("could not process DeviceInfo: %v", err)
+				continue
+			}
+			pac.DeviceInfo = &k
+		case infoTypePACDeviceClaimsInfo:
+			if pac.DeviceClaimsInfo != nil {
+				//Must ignore subsequent buffers of this type
+				continue
+			}
+			var k DeviceClaimsInfo
+			err := k.Unmarshal(p)
+			if err != nil {
+				l.Printf("could not process DeviceClaimsInfo: %v", err)
+				continue
+			}
+			pac.DeviceClaimsInfo = &k
+		}
+	}
+
+	if ok, err := pac.verify(key); !ok {
+		return err
+	}
+
+	return nil
+}
+
+func (pac *PACType) verify(key types.EncryptionKey) (bool, error) {
+	if pac.KerbValidationInfo == nil {
+		return false, errors.New("PAC Info Buffers does not contain a KerbValidationInfo")
+	}
+	if pac.ServerChecksum == nil {
+		return false, errors.New("PAC Info Buffers does not contain a ServerChecksum")
+	}
+	if pac.KDCChecksum == nil {
+		return false, errors.New("PAC Info Buffers does not contain a KDCChecksum")
+	}
+	if pac.ClientInfo == nil {
+		return false, errors.New("PAC Info Buffers does not contain a ClientInfo")
+	}
+	etype, err := crypto.GetChksumEtype(int32(pac.ServerChecksum.SignatureType))
+	if err != nil {
+		return false, err
+	}
+	if ok := etype.VerifyChecksum(key.KeyValue,
+		pac.ZeroSigData,
+		pac.ServerChecksum.Signature,
+		keyusage.KERB_NON_KERB_CKSUM_SALT); !ok {
+		return false, errors.New("PAC service checksum verification failed")
+	}
+
+	return true, nil
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/s4u_delegation_info.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/s4u_delegation_info.go
new file mode 100644
index 0000000..614ee85
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/s4u_delegation_info.go
@@ -0,0 +1,26 @@
+package pac
+
+import (
+	"bytes"
+	"fmt"
+
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+	"gopkg.in/jcmturner/rpc.v1/ndr"
+)
+
+// S4UDelegationInfo implements https://msdn.microsoft.com/en-us/library/cc237944.aspx
+type S4UDelegationInfo struct {
+	S4U2proxyTarget      mstypes.RPCUnicodeString // The name of the principal to whom the application can forward the ticket.
+	TransitedListSize    uint32
+	S4UTransitedServices []mstypes.RPCUnicodeString `ndr:"pointer,conformant"` // List of all services that have been delegated through by this client and subsequent services or servers.. Size is value of TransitedListSize
+}
+
+// Unmarshal bytes into the S4UDelegationInfo struct
+func (k *S4UDelegationInfo) Unmarshal(b []byte) (err error) {
+	dec := ndr.NewDecoder(bytes.NewReader(b))
+	err = dec.Decode(k)
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling S4UDelegationInfo: %v", err)
+	}
+	return
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/signature_data.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/signature_data.go
new file mode 100644
index 0000000..7e0fce1
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/signature_data.go
@@ -0,0 +1,79 @@
+package pac
+
+import (
+	"bytes"
+
+	"gopkg.in/jcmturner/gokrb5.v7/iana/chksumtype"
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+)
+
+/*
+https://msdn.microsoft.com/en-us/library/cc237955.aspx
+
+The Key Usage Value MUST be KERB_NON_KERB_CKSUM_SALT (17) [MS-KILE] (section 3.1.5.9).
+
+Server Signature (SignatureType = 0x00000006)
+https://msdn.microsoft.com/en-us/library/cc237957.aspx
+The KDC will use the long-term key that the KDC shares with the server, so that the server can verify this signature on receiving a PAC.
+The server signature is a keyed hash [RFC4757] of the entire PAC message, with the Signature fields of both PAC_SIGNATURE_DATA structures set to zero.
+The key used to protect the ciphertext part of the response is used.
+The checksum type corresponds to the key unless the key is DES, in which case the KERB_CHECKSUM_HMAC_MD5 key is used.
+The resulting hash value is then placed in the Signature field of the server's PAC_SIGNATURE_DATA structure.
+
+KDC Signature (SignatureType = 0x00000007)
+https://msdn.microsoft.com/en-us/library/dd357117.aspx
+The KDC will use KDC (krbtgt) key [RFC4120], so that other KDCs can verify this signature on receiving a PAC.
+The KDC signature is a keyed hash [RFC4757] of the Server Signature field in the PAC message.
+The cryptographic system that is used to calculate the checksum depends on which system the KDC supports, as defined below:
+- Supports RC4-HMAC --> KERB_CHECKSUM_HMAC_MD5
+- Does not support RC4-HMAC and supports AES256 --> HMAC_SHA1_96_AES256
+- Does not support RC4-HMAC or AES256-CTS-HMAC-SHA1-96, and supports AES128-CTS-HMAC-SHA1-96 --> HMAC_SHA1_96_AES128
+- Does not support RC4-HMAC, AES128-CTS-HMAC-SHA1-96 or AES256-CTS-HMAC-SHA1-96 -->  None. The checksum operation will fail.
+*/
+
+// SignatureData implements https://msdn.microsoft.com/en-us/library/cc237955.aspx
+type SignatureData struct {
+	SignatureType  uint32 // A 32-bit unsigned integer value in little-endian format that defines the cryptographic system used to calculate the checksum. This MUST be one of the following checksum types: KERB_CHECKSUM_HMAC_MD5 (signature size = 16), HMAC_SHA1_96_AES128 (signature size = 12), HMAC_SHA1_96_AES256 (signature size = 12).
+	Signature      []byte // Size depends on the type. See comment above.
+	RODCIdentifier uint16 // A 16-bit unsigned integer value in little-endian format that contains the first 16 bits of the key version number ([MS-KILE] section 3.1.5.8) when the KDC is an RODC. When the KDC is not an RODC, this field does not exist.
+}
+
+// Unmarshal bytes into the SignatureData struct
+func (k *SignatureData) Unmarshal(b []byte) (rb []byte, err error) {
+	r := mstypes.NewReader(bytes.NewReader(b))
+
+	k.SignatureType, err = r.Uint32()
+	if err != nil {
+		return
+	}
+
+	var c int
+	switch k.SignatureType {
+	case chksumtype.KERB_CHECKSUM_HMAC_MD5_UNSIGNED:
+		c = 16
+	case uint32(chksumtype.HMAC_SHA1_96_AES128):
+		c = 12
+	case uint32(chksumtype.HMAC_SHA1_96_AES256):
+		c = 12
+	}
+	k.Signature, err = r.ReadBytes(c)
+	if err != nil {
+		return
+	}
+
+	// When the KDC is not an Read Only Domain Controller (RODC), this field does not exist.
+	if len(b) >= 4+c+2 {
+		k.RODCIdentifier, err = r.Uint16()
+		if err != nil {
+			return
+		}
+	}
+
+	// Create bytes with zeroed signature needed for checksum verification
+	rb = make([]byte, len(b), len(b))
+	copy(rb, b)
+	z := make([]byte, len(b), len(b))
+	copy(rb[4:4+c], z)
+
+	return
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/supplemental_cred.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/supplemental_cred.go
new file mode 100644
index 0000000..5f4f93c
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/supplemental_cred.go
@@ -0,0 +1,90 @@
+package pac
+
+import (
+	"bytes"
+	"encoding/binary"
+	"errors"
+	"fmt"
+
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+	"gopkg.in/jcmturner/rpc.v1/ndr"
+)
+
+const (
+	// NTLMSupCredLMOWF indicates that the LM OWF member is present and valid.
+	NTLMSupCredLMOWF uint32 = 31
+	// NTLMSupCredNTOWF indicates that the NT OWF member is present and valid.
+	NTLMSupCredNTOWF uint32 = 30
+)
+
+// NTLMSupplementalCred implements https://msdn.microsoft.com/en-us/library/cc237949.aspx
+type NTLMSupplementalCred struct {
+	Version    uint32 // A 32-bit unsigned integer that defines the credential version.This field MUST be 0x00000000.
+	Flags      uint32
+	LMPassword []byte // A 16-element array of unsigned 8-bit integers that define the LM OWF. The LMPassword member MUST be ignored if the L flag is not set in the Flags member.
+	NTPassword []byte // A 16-element array of unsigned 8-bit integers that define the NT OWF. The NTPassword member MUST be ignored if the N flag is not set in the Flags member.
+}
+
+// Unmarshal converts the bytes provided into a NTLMSupplementalCred.
+func (c *NTLMSupplementalCred) Unmarshal(b []byte) (err error) {
+	r := mstypes.NewReader(bytes.NewReader(b))
+	c.Version, err = r.Uint32()
+	if err != nil {
+		return
+	}
+	if c.Version != 0 {
+		err = errors.New("NTLMSupplementalCred version is not zero")
+		return
+	}
+	c.Flags, err = r.Uint32()
+	if err != nil {
+		return
+	}
+	if isFlagSet(c.Flags, NTLMSupCredLMOWF) {
+		c.LMPassword, err = r.ReadBytes(16)
+		if err != nil {
+			return
+		}
+	}
+	if isFlagSet(c.Flags, NTLMSupCredNTOWF) {
+		c.NTPassword, err = r.ReadBytes(16)
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+// isFlagSet tests if a flag is set in the uint32 little endian flag
+func isFlagSet(f uint32, i uint32) bool {
+	//Which byte?
+	b := int(i / 8)
+	//Which bit in byte
+	p := uint(7 - (int(i) - 8*b))
+	fb := make([]byte, 4)
+	binary.LittleEndian.PutUint32(fb, f)
+	if fb[b]&(1<<p) != 0 {
+		return true
+	}
+	return false
+}
+
+// SECPKGSupplementalCred implements https://msdn.microsoft.com/en-us/library/cc237956.aspx
+// The SECPKG_SUPPLEMENTAL_CRED structure defines the name of the security package that requires
+// supplemental credentials and the credential buffer for that package.
+// The SECPKG_SUPPLEMENTAL_CRED structure is marshaled by RPC.
+type SECPKGSupplementalCred struct {
+	PackageName    mstypes.RPCUnicodeString
+	CredentialSize uint32
+	Credentials    []uint8 `ndr:"pointer,conformant"` // Is a ptr. Size is the value of CredentialSize
+}
+
+// Unmarshal converts the bytes provided into a SECPKGSupplementalCred.
+func (c *SECPKGSupplementalCred) Unmarshal(b []byte) (err error) {
+	dec := ndr.NewDecoder(bytes.NewReader(b))
+	err = dec.Decode(c)
+	if err != nil {
+		err = fmt.Errorf("error unmarshaling SECPKGSupplementalCred: %v", err)
+	}
+	return
+}
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/upn_dns_info.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/upn_dns_info.go
new file mode 100644
index 0000000..ee0e6bf
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/pac/upn_dns_info.go
@@ -0,0 +1,73 @@
+package pac
+
+import (
+	"bytes"
+
+	"gopkg.in/jcmturner/rpc.v1/mstypes"
+)
+
+// UPNDNSInfo implements https://msdn.microsoft.com/en-us/library/dd240468.aspx
+type UPNDNSInfo struct {
+	UPNLength           uint16 // An unsigned 16-bit integer in little-endian format that specifies the length, in bytes, of the UPN field.
+	UPNOffset           uint16 // An unsigned 16-bit integer in little-endian format that contains the offset to the beginning of the buffer, in bytes, from the beginning of the UPN_DNS_INFO structure.
+	DNSDomainNameLength uint16
+	DNSDomainNameOffset uint16
+	Flags               uint32
+	UPN                 string
+	DNSDomain           string
+}
+
+const (
+	upnNoUPNAttr = 31 // The user account object does not have the userPrincipalName attribute ([MS-ADA3] section 2.349) set. A UPN constructed by concatenating the user name with the DNS domain name of the account domain is provided.
+)
+
+// Unmarshal bytes into the UPN_DNSInfo struct
+func (k *UPNDNSInfo) Unmarshal(b []byte) (err error) {
+	//The UPN_DNS_INFO structure is a simple structure that is not NDR-encoded.
+	r := mstypes.NewReader(bytes.NewReader(b))
+	k.UPNLength, err = r.Uint16()
+	if err != nil {
+		return
+	}
+	k.UPNOffset, err = r.Uint16()
+	if err != nil {
+		return
+	}
+	k.DNSDomainNameLength, err = r.Uint16()
+	if err != nil {
+		return
+	}
+	k.DNSDomainNameOffset, err = r.Uint16()
+	if err != nil {
+		return
+	}
+	k.Flags, err = r.Uint32()
+	if err != nil {
+		return
+	}
+	ub := mstypes.NewReader(bytes.NewReader(b[k.UPNOffset : k.UPNOffset+k.UPNLength]))
+	db := mstypes.NewReader(bytes.NewReader(b[k.DNSDomainNameOffset : k.DNSDomainNameOffset+k.DNSDomainNameLength]))
+
+	u := make([]rune, k.UPNLength/2, k.UPNLength/2)
+	for i := 0; i < len(u); i++ {
+		var r uint16
+		r, err = ub.Uint16()
+		if err != nil {
+			return
+		}
+		u[i] = rune(r)
+	}
+	k.UPN = string(u)
+	d := make([]rune, k.DNSDomainNameLength/2, k.DNSDomainNameLength/2)
+	for i := 0; i < len(d); i++ {
+		var r uint16
+		r, err = db.Uint16()
+		if err != nil {
+			return
+		}
+		d[i] = rune(r)
+	}
+	k.DNSDomain = string(d)
+
+	return
+}