security_windows.go
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security_windows.go
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	// Copyright 2012 The Go Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	package windows

	import (
	"syscall"
	"unsafe"
	)

	const (
	STANDARD_RIGHTS_REQUIRED = 0xf0000
	STANDARD_RIGHTS_READ = 0x20000
	STANDARD_RIGHTS_WRITE = 0x20000
	STANDARD_RIGHTS_EXECUTE = 0x20000
	STANDARD_RIGHTS_ALL = 0x1F0000
	)

	const (
	NameUnknown = 0
	NameFullyQualifiedDN = 1
	NameSamCompatible = 2
	NameDisplay = 3
	NameUniqueId = 6
	NameCanonical = 7
	NameUserPrincipal = 8
	NameCanonicalEx = 9
	NameServicePrincipal = 10
	NameDnsDomain = 12
	)

	// This function returns 1 byte BOOLEAN rather than the 4 byte BOOL.
	// http://blogs.msdn.com/b/drnick/archive/2007/12/19/windows-and-upn-format-credentials.aspx
	//sys TranslateName(accName uint16, accNameFormat uint32, desiredNameFormat uint32, translatedName uint16, nSize *uint32) (err error) [failretval&0xff==0] = secur32.TranslateNameW
	//sys GetUserNameEx(nameFormat uint32, nameBuffre uint16, nSize uint32) (err error) [failretval&0xff==0] = secur32.GetUserNameExW

	// TranslateAccountName converts a directory service
	// object name from one format to another.
	func TranslateAccountName(username string, from, to uint32, initSize int) (string, error) {
	u, e := UTF16PtrFromString(username)
	if e != nil {
	return "", e
	}
	n := uint32(50)
	for {
	b := make([]uint16, n)
	e = TranslateName(u, from, to, &b[0], &n)
	if e == nil {
	return UTF16ToString(b[:n]), nil
	}
	if e != ERROR_INSUFFICIENT_BUFFER {
	return "", e
	}
	if n <= uint32(len(b)) {
	return "", e
	}
	}
	}

	const (
	// do not reorder
	NetSetupUnknownStatus = iota
	NetSetupUnjoined
	NetSetupWorkgroupName
	NetSetupDomainName
	)

	type UserInfo10 struct {
	Name *uint16
	Comment *uint16
	UsrComment *uint16
	FullName *uint16
	}

	//sys NetUserGetInfo(serverName uint16, userName uint16, level uint32, buf **byte) (neterr error) = netapi32.NetUserGetInfo
	//sys NetGetJoinInformation(server uint16, name uint16, bufType uint32) (neterr error) = netapi32.NetGetJoinInformation
	//sys NetApiBufferFree(buf *byte) (neterr error) = netapi32.NetApiBufferFree

	const (
	// do not reorder
	SidTypeUser = 1 + iota
	SidTypeGroup
	SidTypeDomain
	SidTypeAlias
	SidTypeWellKnownGroup
	SidTypeDeletedAccount
	SidTypeInvalid
	SidTypeUnknown
	SidTypeComputer
	SidTypeLabel
	)

	type SidIdentifierAuthority struct {
	Value [6]byte
	}

	var (
	SECURITY_NULL_SID_AUTHORITY = SidIdentifierAuthority{[6]byte{0, 0, 0, 0, 0, 0}}
	SECURITY_WORLD_SID_AUTHORITY = SidIdentifierAuthority{[6]byte{0, 0, 0, 0, 0, 1}}
	SECURITY_LOCAL_SID_AUTHORITY = SidIdentifierAuthority{[6]byte{0, 0, 0, 0, 0, 2}}
	SECURITY_CREATOR_SID_AUTHORITY = SidIdentifierAuthority{[6]byte{0, 0, 0, 0, 0, 3}}
	SECURITY_NON_UNIQUE_AUTHORITY = SidIdentifierAuthority{[6]byte{0, 0, 0, 0, 0, 4}}
	SECURITY_NT_AUTHORITY = SidIdentifierAuthority{[6]byte{0, 0, 0, 0, 0, 5}}
	SECURITY_MANDATORY_LABEL_AUTHORITY = SidIdentifierAuthority{[6]byte{0, 0, 0, 0, 0, 16}}
	)

	const (
	SECURITY_NULL_RID = 0
	SECURITY_WORLD_RID = 0
	SECURITY_LOCAL_RID = 0
	SECURITY_CREATOR_OWNER_RID = 0
	SECURITY_CREATOR_GROUP_RID = 1
	SECURITY_DIALUP_RID = 1
	SECURITY_NETWORK_RID = 2
	SECURITY_BATCH_RID = 3
	SECURITY_INTERACTIVE_RID = 4
	SECURITY_LOGON_IDS_RID = 5
	SECURITY_SERVICE_RID = 6
	SECURITY_LOCAL_SYSTEM_RID = 18
	SECURITY_BUILTIN_DOMAIN_RID = 32
	SECURITY_PRINCIPAL_SELF_RID = 10
	SECURITY_CREATOR_OWNER_SERVER_RID = 0x2
	SECURITY_CREATOR_GROUP_SERVER_RID = 0x3
	SECURITY_LOGON_IDS_RID_COUNT = 0x3
	SECURITY_ANONYMOUS_LOGON_RID = 0x7
	SECURITY_PROXY_RID = 0x8
	SECURITY_ENTERPRISE_CONTROLLERS_RID = 0x9
	SECURITY_SERVER_LOGON_RID = SECURITY_ENTERPRISE_CONTROLLERS_RID
	SECURITY_AUTHENTICATED_USER_RID = 0xb
	SECURITY_RESTRICTED_CODE_RID = 0xc
	SECURITY_NT_NON_UNIQUE_RID = 0x15
	)

	// Predefined domain-relative RIDs for local groups.
	// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa379649(v=vs.85).aspx
	const (
	DOMAIN_ALIAS_RID_ADMINS = 0x220
	DOMAIN_ALIAS_RID_USERS = 0x221
	DOMAIN_ALIAS_RID_GUESTS = 0x222
	DOMAIN_ALIAS_RID_POWER_USERS = 0x223
	DOMAIN_ALIAS_RID_ACCOUNT_OPS = 0x224
	DOMAIN_ALIAS_RID_SYSTEM_OPS = 0x225
	DOMAIN_ALIAS_RID_PRINT_OPS = 0x226
	DOMAIN_ALIAS_RID_BACKUP_OPS = 0x227
	DOMAIN_ALIAS_RID_REPLICATOR = 0x228
	DOMAIN_ALIAS_RID_RAS_SERVERS = 0x229
	DOMAIN_ALIAS_RID_PREW2KCOMPACCESS = 0x22a
	DOMAIN_ALIAS_RID_REMOTE_DESKTOP_USERS = 0x22b
	DOMAIN_ALIAS_RID_NETWORK_CONFIGURATION_OPS = 0x22c
	DOMAIN_ALIAS_RID_INCOMING_FOREST_TRUST_BUILDERS = 0x22d
	DOMAIN_ALIAS_RID_MONITORING_USERS = 0X22e
	DOMAIN_ALIAS_RID_LOGGING_USERS = 0x22f
	DOMAIN_ALIAS_RID_AUTHORIZATIONACCESS = 0x230
	DOMAIN_ALIAS_RID_TS_LICENSE_SERVERS = 0x231
	DOMAIN_ALIAS_RID_DCOM_USERS = 0x232
	DOMAIN_ALIAS_RID_IUSERS = 0x238
	DOMAIN_ALIAS_RID_CRYPTO_OPERATORS = 0x239
	DOMAIN_ALIAS_RID_CACHEABLE_PRINCIPALS_GROUP = 0x23b
	DOMAIN_ALIAS_RID_NON_CACHEABLE_PRINCIPALS_GROUP = 0x23c
	DOMAIN_ALIAS_RID_EVENT_LOG_READERS_GROUP = 0x23d
	DOMAIN_ALIAS_RID_CERTSVC_DCOM_ACCESS_GROUP = 0x23e
	)

	//sys LookupAccountSid(systemName uint16, sid SID, name uint16, nameLen uint32, refdDomainName uint16, refdDomainNameLen uint32, use *uint32) (err error) = advapi32.LookupAccountSidW
	//sys LookupAccountName(systemName uint16, accountName uint16, sid SID, sidLen uint32, refdDomainName uint16, refdDomainNameLen uint32, use *uint32) (err error) = advapi32.LookupAccountNameW
	//sys ConvertSidToStringSid(sid SID, stringSid *uint16) (err error) = advapi32.ConvertSidToStringSidW
	//sys ConvertStringSidToSid(stringSid uint16, sid *SID) (err error) = advapi32.ConvertStringSidToSidW
	//sys GetLengthSid(sid *SID) (len uint32) = advapi32.GetLengthSid
	//sys CopySid(destSidLen uint32, destSid SID, srcSid SID) (err error) = advapi32.CopySid
	//sys AllocateAndInitializeSid(identAuth SidIdentifierAuthority, subAuth byte, subAuth0 uint32, subAuth1 uint32, subAuth2 uint32, subAuth3 uint32, subAuth4 uint32, subAuth5 uint32, subAuth6 uint32, subAuth7 uint32, sid *SID) (err error) = advapi32.AllocateAndInitializeSid
	//sys FreeSid(sid *SID) (err error) [failretval!=0] = advapi32.FreeSid
	//sys EqualSid(sid1 SID, sid2 SID) (isEqual bool) = advapi32.EqualSid

	// The security identifier (SID) structure is a variable-length
	// structure used to uniquely identify users or groups.
	type SID struct{}

	// StringToSid converts a string-format security identifier
	// sid into a valid, functional sid.
	func StringToSid(s string) (*SID, error) {
	var sid *SID
	p, e := UTF16PtrFromString(s)
	if e != nil {
	return nil, e
	}
	e = ConvertStringSidToSid(p, &sid)
	if e != nil {
	return nil, e
	}
	defer LocalFree((Handle)(unsafe.Pointer(sid)))
	return sid.Copy()
	}

	// LookupSID retrieves a security identifier sid for the account
	// and the name of the domain on which the account was found.
	// System specify target computer to search.
	func LookupSID(system, account string) (sid *SID, domain string, accType uint32, err error) {
	if len(account) == 0 {
	return nil, "", 0, syscall.EINVAL
	}
	acc, e := UTF16PtrFromString(account)
	if e != nil {
	return nil, "", 0, e
	}
	var sys *uint16
	if len(system) > 0 {
	sys, e = UTF16PtrFromString(system)
	if e != nil {
	return nil, "", 0, e
	}
	}
	n := uint32(50)
	dn := uint32(50)
	for {
	b := make([]byte, n)
	db := make([]uint16, dn)
	sid = (*SID)(unsafe.Pointer(&b[0]))
	e = LookupAccountName(sys, acc, sid, &n, &db[0], &dn, &accType)
	if e == nil {
	return sid, UTF16ToString(db), accType, nil
	}
	if e != ERROR_INSUFFICIENT_BUFFER {
	return nil, "", 0, e
	}
	if n <= uint32(len(b)) {
	return nil, "", 0, e
	}
	}
	}

	// String converts sid to a string format
	// suitable for display, storage, or transmission.
	func (sid *SID) String() (string, error) {
	var s *uint16
	e := ConvertSidToStringSid(sid, &s)
	if e != nil {
	return "", e
	}
	defer LocalFree((Handle)(unsafe.Pointer(s)))
	return UTF16ToString((*[256]uint16)(unsafe.Pointer(s))[:]), nil
	}

	// Len returns the length, in bytes, of a valid security identifier sid.
	func (sid *SID) Len() int {
	return int(GetLengthSid(sid))
	}

	// Copy creates a duplicate of security identifier sid.
	func (sid SID) Copy() (SID, error) {
	b := make([]byte, sid.Len())
	sid2 := (*SID)(unsafe.Pointer(&b[0]))
	e := CopySid(uint32(len(b)), sid2, sid)
	if e != nil {
	return nil, e
	}
	return sid2, nil
	}

	// LookupAccount retrieves the name of the account for this sid
	// and the name of the first domain on which this sid is found.
	// System specify target computer to search for.
	func (sid *SID) LookupAccount(system string) (account, domain string, accType uint32, err error) {
	var sys *uint16
	if len(system) > 0 {
	sys, err = UTF16PtrFromString(system)
	if err != nil {
	return "", "", 0, err
	}
	}
	n := uint32(50)
	dn := uint32(50)
	for {
	b := make([]uint16, n)
	db := make([]uint16, dn)
	e := LookupAccountSid(sys, sid, &b[0], &n, &db[0], &dn, &accType)
	if e == nil {
	return UTF16ToString(b), UTF16ToString(db), accType, nil
	}
	if e != ERROR_INSUFFICIENT_BUFFER {
	return "", "", 0, e
	}
	if n <= uint32(len(b)) {
	return "", "", 0, e
	}
	}
	}

	const (
	// do not reorder
	TOKEN_ASSIGN_PRIMARY = 1 << iota
	TOKEN_DUPLICATE
	TOKEN_IMPERSONATE
	TOKEN_QUERY
	TOKEN_QUERY_SOURCE
	TOKEN_ADJUST_PRIVILEGES
	TOKEN_ADJUST_GROUPS
	TOKEN_ADJUST_DEFAULT
	TOKEN_ADJUST_SESSIONID

	TOKEN_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED \|
	TOKEN_ASSIGN_PRIMARY \|
	TOKEN_DUPLICATE \|
	TOKEN_IMPERSONATE \|
	TOKEN_QUERY \|
	TOKEN_QUERY_SOURCE \|
	TOKEN_ADJUST_PRIVILEGES \|
	TOKEN_ADJUST_GROUPS \|
	TOKEN_ADJUST_DEFAULT \|
	TOKEN_ADJUST_SESSIONID
	TOKEN_READ = STANDARD_RIGHTS_READ \| TOKEN_QUERY
	TOKEN_WRITE = STANDARD_RIGHTS_WRITE \|
	TOKEN_ADJUST_PRIVILEGES \|
	TOKEN_ADJUST_GROUPS \|
	TOKEN_ADJUST_DEFAULT
	TOKEN_EXECUTE = STANDARD_RIGHTS_EXECUTE
	)

	const (
	// do not reorder
	TokenUser = 1 + iota
	TokenGroups
	TokenPrivileges
	TokenOwner
	TokenPrimaryGroup
	TokenDefaultDacl
	TokenSource
	TokenType
	TokenImpersonationLevel
	TokenStatistics
	TokenRestrictedSids
	TokenSessionId
	TokenGroupsAndPrivileges
	TokenSessionReference
	TokenSandBoxInert
	TokenAuditPolicy
	TokenOrigin
	TokenElevationType
	TokenLinkedToken
	TokenElevation
	TokenHasRestrictions
	TokenAccessInformation
	TokenVirtualizationAllowed
	TokenVirtualizationEnabled
	TokenIntegrityLevel
	TokenUIAccess
	TokenMandatoryPolicy
	TokenLogonSid
	MaxTokenInfoClass
	)

	type SIDAndAttributes struct {
	Sid *SID
	Attributes uint32
	}

	type Tokenuser struct {
	User SIDAndAttributes
	}

	type Tokenprimarygroup struct {
	PrimaryGroup *SID
	}

	type Tokengroups struct {
	GroupCount uint32
	Groups [1]SIDAndAttributes
	}

	// Authorization Functions
	//sys checkTokenMembership(tokenHandle Token, sidToCheck SID, isMember int32) (err error) = advapi32.CheckTokenMembership
	//sys OpenProcessToken(h Handle, access uint32, token *Token) (err error) = advapi32.OpenProcessToken
	//sys GetTokenInformation(t Token, infoClass uint32, info byte, infoLen uint32, returnedLen uint32) (err error) = advapi32.GetTokenInformation
	//sys GetUserProfileDirectory(t Token, dir uint16, dirLen uint32) (err error) = userenv.GetUserProfileDirectoryW

	// An access token contains the security information for a logon session.
	// The system creates an access token when a user logs on, and every
	// process executed on behalf of the user has a copy of the token.
	// The token identifies the user, the user's groups, and the user's
	// privileges. The system uses the token to control access to securable
	// objects and to control the ability of the user to perform various
	// system-related operations on the local computer.
	type Token Handle

	// OpenCurrentProcessToken opens the access token
	// associated with current process.
	func OpenCurrentProcessToken() (Token, error) {
	p, e := GetCurrentProcess()
	if e != nil {
	return 0, e
	}
	var t Token
	e = OpenProcessToken(p, TOKEN_QUERY, &t)
	if e != nil {
	return 0, e
	}
	return t, nil
	}

	// Close releases access to access token.
	func (t Token) Close() error {
	return CloseHandle(Handle(t))
	}

	// getInfo retrieves a specified type of information about an access token.
	func (t Token) getInfo(class uint32, initSize int) (unsafe.Pointer, error) {
	n := uint32(initSize)
	for {
	b := make([]byte, n)
	e := GetTokenInformation(t, class, &b[0], uint32(len(b)), &n)
	if e == nil {
	return unsafe.Pointer(&b[0]), nil
	}
	if e != ERROR_INSUFFICIENT_BUFFER {
	return nil, e
	}
	if n <= uint32(len(b)) {
	return nil, e
	}
	}
	}

	// GetTokenUser retrieves access token t user account information.
	func (t Token) GetTokenUser() (*Tokenuser, error) {
	i, e := t.getInfo(TokenUser, 50)
	if e != nil {
	return nil, e
	}
	return (*Tokenuser)(i), nil
	}

	// GetTokenGroups retrieves group accounts associated with access token t.
	func (t Token) GetTokenGroups() (*Tokengroups, error) {
	i, e := t.getInfo(TokenGroups, 50)
	if e != nil {
	return nil, e
	}
	return (*Tokengroups)(i), nil
	}

	// GetTokenPrimaryGroup retrieves access token t primary group information.
	// A pointer to a SID structure representing a group that will become
	// the primary group of any objects created by a process using this access token.
	func (t Token) GetTokenPrimaryGroup() (*Tokenprimarygroup, error) {
	i, e := t.getInfo(TokenPrimaryGroup, 50)
	if e != nil {
	return nil, e
	}
	return (*Tokenprimarygroup)(i), nil
	}

	// GetUserProfileDirectory retrieves path to the
	// root directory of the access token t user's profile.
	func (t Token) GetUserProfileDirectory() (string, error) {
	n := uint32(100)
	for {
	b := make([]uint16, n)
	e := GetUserProfileDirectory(t, &b[0], &n)
	if e == nil {
	return UTF16ToString(b), nil
	}
	if e != ERROR_INSUFFICIENT_BUFFER {
	return "", e
	}
	if n <= uint32(len(b)) {
	return "", e
	}
	}
	}

	// IsMember reports whether the access token t is a member of the provided SID.
	func (t Token) IsMember(sid *SID) (bool, error) {
	var b int32
	if e := checkTokenMembership(t, sid, &b); e != nil {
	return false, e
	}
	return b != 0, nil
	}

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