91 lines
2.7 KiB
Go
91 lines
2.7 KiB
Go
package pac
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"errors"
|
|
"fmt"
|
|
|
|
"github.com/jcmturner/rpc/v2/mstypes"
|
|
"github.com/jcmturner/rpc/v2/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
|
|
}
|