Initial QSfera import

Server/vendor/github.com/libregraph/idm/server/handler/boltdb/handler.go

@@ -0,0 +1,333 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package boltdb
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"path/filepath"
+	"strings"
+
+	"github.com/go-ldap/ldap/v3"
+	"github.com/sirupsen/logrus"
+
+	"github.com/libregraph/idm/pkg/ldapdn"
+	"github.com/libregraph/idm/pkg/ldapentry"
+	"github.com/libregraph/idm/pkg/ldappassword"
+	"github.com/libregraph/idm/pkg/ldapserver"
+	"github.com/libregraph/idm/pkg/ldbbolt"
+	"github.com/libregraph/idm/server/handler"
+)
+
+type boltdbHandler struct {
+	logger                  logrus.FieldLogger
+	dbfile                  string
+	baseDN                  string
+	adminDN                 string
+	allowLocalAnonymousBind bool
+	ctx                     context.Context
+	bdb                     *ldbbolt.LdbBolt
+}
+
+type Options struct {
+	BaseDN  string
+	AdminDN string
+
+	AllowLocalAnonymousBind bool
+}
+
+func NewBoltDBHandler(logger logrus.FieldLogger, fn string, options *Options) (handler.Handler, error) {
+	if fn == "" {
+		return nil, fmt.Errorf("file name is empty")
+	}
+	if options.BaseDN == "" {
+		return nil, fmt.Errorf("base dn is empty")
+	}
+
+	fn, err := filepath.Abs(fn)
+	if err != nil {
+		return nil, err
+	}
+
+	h := &boltdbHandler{
+		logger: logger,
+		dbfile: fn,
+
+		allowLocalAnonymousBind: options.AllowLocalAnonymousBind,
+		ctx:                     context.Background(),
+	}
+	if h.baseDN, err = ldapdn.ParseNormalize(options.BaseDN); err != nil {
+		return nil, err
+	}
+	if h.adminDN, err = ldapdn.ParseNormalize(options.AdminDN); err != nil {
+		return nil, err
+	}
+
+	err = h.setup()
+	if err != nil {
+		return nil, err
+	}
+	return h, nil
+}
+
+func (h *boltdbHandler) setup() error {
+	bdb := &ldbbolt.LdbBolt{}
+
+	if err := bdb.Configure(h.logger, h.baseDN, h.dbfile, nil); err != nil {
+		return err
+	}
+
+	if err := bdb.Initialize(); err != nil {
+		return err
+	}
+	h.bdb = bdb
+	return nil
+}
+
+func (h *boltdbHandler) Add(boundDN string, req *ldap.AddRequest, conn net.Conn) (ldapserver.LDAPResultCode, error) {
+	logger := h.logger.WithFields(logrus.Fields{
+		"op":          "add",
+		"bind_dn":     boundDN,
+		"remote_addr": conn.RemoteAddr().String(),
+	})
+
+	if !h.writeAllowed(boundDN) {
+		return ldap.LDAPResultInsufficientAccessRights, nil
+	}
+
+	e := ldapentry.EntryFromAddRequest(req)
+
+	if err := h.bdb.EntryPut(e); err != nil {
+		logger.WithError(err).WithField("entrydn", e.DN).Debugln("ldap add failed")
+		if errors.Is(err, ldbbolt.ErrEntryAlreadyExists) {
+			return ldap.LDAPResultEntryAlreadyExists, nil
+		}
+		return ldap.LDAPResultUnwillingToPerform, err
+	}
+	return ldap.LDAPResultSuccess, nil
+}
+
+func (h *boltdbHandler) Bind(bindDN, bindSimplePw string, conn net.Conn) (ldapserver.LDAPResultCode, error) {
+	logger := h.logger.WithFields(logrus.Fields{
+		"op":          "bind",
+		"bind_dn":     bindDN,
+		"remote_addr": conn.RemoteAddr().String(),
+	})
+
+	// Handle anoymous bind
+	if bindDN == "" {
+		if !h.allowLocalAnonymousBind {
+			logger.Debugln("ldap anonymous Bind disabled")
+			return ldap.LDAPResultInvalidCredentials, nil
+		} else if bindSimplePw == "" {
+			return ldap.LDAPResultSuccess, nil
+		}
+	}
+
+	bindDN, err := ldapdn.ParseNormalize(bindDN)
+	if err != nil {
+		logger.WithError(err).Debugln("ldap bind request BindDN validation failed")
+		return ldap.LDAPResultInvalidDNSyntax, nil
+	}
+
+	if !strings.HasSuffix(bindDN, h.baseDN) {
+		logger.WithError(err).Debugln("ldap bind request BindDN outside of Database tree")
+		return ldap.LDAPResultInvalidCredentials, nil
+	}
+
+	// Disallow empty password
+	if bindSimplePw == "" {
+		logger.Debugf("BindDN without password")
+		return ldap.LDAPResultInvalidCredentials, nil
+	}
+
+	return h.validatePassword(logger, bindDN, bindSimplePw)
+}
+
+func (h *boltdbHandler) validatePassword(logger logrus.FieldLogger, bindDN, bindSimplePw string) (ldapserver.LDAPResultCode, error) {
+	// Lookup Bind DN in database
+	entries, err := h.bdb.Search(bindDN, ldap.ScopeBaseObject)
+	if err != nil || len(entries) != 1 {
+		if err != nil {
+			logger.Error(err)
+		}
+		if len(entries) != 1 {
+			logger.Debugf("Entry '%s' does not exist", bindDN)
+		}
+		return ldap.LDAPResultInvalidCredentials, nil
+	}
+	userPassword := entries[0].GetEqualFoldAttributeValue("userPassword")
+	match, err := ldappassword.Validate(bindSimplePw, userPassword)
+	if err != nil {
+		logger.Error(err)
+		return ldap.LDAPResultInvalidCredentials, nil
+	}
+	if match {
+		logger.Debug("success")
+		return ldap.LDAPResultSuccess, nil
+	}
+	return ldap.LDAPResultInvalidCredentials, nil
+}
+
+func (h *boltdbHandler) Delete(boundDN string, req *ldap.DelRequest, conn net.Conn) (ldapserver.LDAPResultCode, error) {
+	logger := h.logger.WithFields(logrus.Fields{
+		"op":          "delete",
+		"bind_dn":     boundDN,
+		"remote_addr": conn.RemoteAddr().String(),
+	})
+
+	if !h.writeAllowed(boundDN) {
+		return ldap.LDAPResultInsufficientAccessRights, nil
+	}
+
+	logger.Debug("Calling boltdb delete")
+	if err := h.bdb.EntryDelete(req.DN); err != nil {
+		logger.WithError(err).WithField("entrydn", req.DN).Debugln("ldap delete failed")
+		if errors.Is(err, ldbbolt.ErrEntryAlreadyExists) {
+			return ldap.LDAPResultEntryAlreadyExists, nil
+		}
+		return ldap.LDAPResultUnwillingToPerform, err
+	}
+	logger.Debug("delete succeeded")
+	return ldap.LDAPResultSuccess, nil
+}
+
+func (h *boltdbHandler) Modify(boundDN string, req *ldap.ModifyRequest, conn net.Conn) (ldapserver.LDAPResultCode, error) {
+	logger := h.logger.WithFields(logrus.Fields{
+		"op":          "modify",
+		"bind_dn":     boundDN,
+		"remote_addr": conn.RemoteAddr().String(),
+		"entrydn":     req.DN,
+	})
+
+	if !h.writeAllowed(boundDN) {
+		return ldap.LDAPResultInsufficientAccessRights, nil
+	}
+
+	logger.Debug("Calling boltdb modify")
+	if err := h.bdb.EntryModify(req); err != nil {
+		logger.WithError(err).Debug("ldap modify failed")
+		if errors.Is(err, ldbbolt.ErrEntryAlreadyExists) {
+			return ldap.LDAPResultEntryAlreadyExists, nil
+		}
+		ldapError, ok := err.(*ldap.Error)
+		if !ok {
+			return ldap.LDAPResultUnwillingToPerform, err
+		}
+		return ldapserver.LDAPResultCode(ldapError.ResultCode), ldapError.Err
+	}
+	logger.Debug("modify succeeded")
+	return ldap.LDAPResultSuccess, nil
+}
+
+func (h *boltdbHandler) ModifyDN(boundDN string, req *ldap.ModifyDNRequest, conn net.Conn) (ldapserver.LDAPResultCode, error) {
+	logger := h.logger.WithFields(logrus.Fields{
+		"op":          "modifyDN",
+		"bind_dn":     boundDN,
+		"remote_addr": conn.RemoteAddr().String(),
+		"entrydn":     req.DN,
+	})
+
+	if !h.writeAllowed(boundDN) {
+		return ldap.LDAPResultInsufficientAccessRights, nil
+	}
+	logger.Debug("Calling boltdb modify DN")
+	if err := h.bdb.EntryModifyDN(req); err != nil {
+		logger.WithError(err).Debug("ldap modifyDN failed")
+		if errors.Is(err, ldbbolt.ErrEntryAlreadyExists) {
+			return ldap.LDAPResultEntryAlreadyExists, nil
+		}
+		ldapError, ok := err.(*ldap.Error)
+		if !ok {
+			return ldap.LDAPResultUnwillingToPerform, err
+		}
+		return ldapserver.LDAPResultCode(ldapError.ResultCode), ldapError.Err
+	}
+	logger.Debug("modify DN succeeded")
+	return ldap.LDAPResultSuccess, nil
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *boltdbHandler) ModifyPasswordExop(boundDN string, req *ldap.PasswordModifyRequest, conn net.Conn) (ldapserver.LDAPResultCode, error) {
+	logger := h.logger.WithFields(logrus.Fields{
+		"op":           "modpw_exop",
+		"binddn":       boundDN,
+		"UserIdentity": req.UserIdentity,
+		"OldPWPresent": req.OldPassword != "",
+		"NewPwPresent": req.NewPassword != "",
+	})
+
+	if boundDN == "" {
+		return ldap.LDAPResultInsufficientAccessRights, nil
+	}
+
+	if req.UserIdentity != "" {
+		pwUserDN, err := ldapdn.ParseNormalize(req.UserIdentity)
+		if err != nil {
+			return ldap.LDAPResultOperationsError, errors.New("Error parsing DN in password modify extended operation.")
+		}
+		if boundDN != pwUserDN && boundDN != h.adminDN {
+			return ldap.LDAPResultInsufficientAccessRights, nil
+		}
+	}
+
+	logger.Debug("Calling boltdb UpdatePassword")
+	err := h.bdb.UpdatePassword(req)
+	if err != nil {
+		logger.Debugf("boltdb UpdatePassword returned '%s'", err)
+		return ldap.LDAPResultOther, err
+	}
+	return ldap.LDAPResultSuccess, err
+}
+
+func (h *boltdbHandler) Search(boundDN string, req *ldap.SearchRequest, conn net.Conn) (ldapserver.ServerSearchResult, error) {
+	logger := h.logger.WithFields(logrus.Fields{
+		"op":     "search",
+		"binddn": boundDN,
+		"basedn": req.BaseDN,
+		"filter": req.Filter,
+		"attrs":  req.Attributes,
+	})
+
+	logger.Debug("Calling boltdb search")
+	entries, _ := h.bdb.Search(req.BaseDN, req.Scope)
+	logger.Debugf("boltdb search returned %d entries", len(entries))
+
+	return ldapserver.ServerSearchResult{
+		Entries:    entries,
+		Referrals:  []string{},
+		Controls:   []ldap.Control{},
+		ResultCode: ldap.LDAPResultSuccess,
+	}, nil
+}
+
+func (h *boltdbHandler) Close(boundDN string, conn net.Conn) error {
+	return nil
+}
+
+func (h *boltdbHandler) WithContext(ctx context.Context) handler.Handler {
+	if ctx == nil {
+		panic("nil context")
+	}
+
+	h2 := new(boltdbHandler)
+	*h2 = *h
+	h2.ctx = ctx
+	return h2
+}
+
+func (h *boltdbHandler) Reload(ctx context.Context) error {
+	return nil
+}
+
+func (h *boltdbHandler) writeAllowed(boundDN string) bool {
+	if h.adminDN != "" && h.adminDN == boundDN {
+		return true
+	}
+	return false
+}

Server/vendor/github.com/libregraph/idm/server/handler/handler.go

@@ -0,0 +1,32 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package handler
+
+import (
+	"context"
+
+	"github.com/libregraph/idm/pkg/ldapserver"
+)
+
+// Interface for handlers.
+type Handler interface {
+	ldapserver.Adder
+	ldapserver.Binder
+	ldapserver.Deleter
+	ldapserver.Modifier
+	ldapserver.PasswordUpdater
+	ldapserver.Renamer
+	ldapserver.Searcher
+	ldapserver.Closer
+
+	WithContext(context.Context) Handler
+	Reload(context.Context) error
+}
+
+// Interface for middlewares.
+type Middleware interface {
+	WithHandler(next Handler) Handler
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/entry.go

@@ -0,0 +1,31 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+import (
+	"fmt"
+
+	"github.com/go-ldap/ldap/v3"
+
+	"github.com/libregraph/idm/pkg/ldappassword"
+)
+
+type ldifEntry struct {
+	*ldap.Entry
+
+	UserPassword *ldap.EntryAttribute
+}
+
+func (entry *ldifEntry) validatePassword(bindSimplePw string) error {
+	match, err := ldappassword.Validate(bindSimplePw, entry.UserPassword.Values[0])
+	if err != nil {
+		return err
+	}
+	if !match {
+		return fmt.Errorf("password mismatch")
+	}
+	return nil
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/filter.go

@@ -0,0 +1,113 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/go-asn1-ber/asn1-ber"
+
+	"github.com/libregraph/idm/pkg/ldapserver"
+)
+
+func parseFilterToIndexFilter(filter string) ([][]string, error) {
+	f, err := ldapserver.CompileFilter(filter)
+	if err != nil {
+		return nil, err
+	}
+
+	var result [][]string
+	matches, err := parseFilterMatchLeavesForIndex(f, nil, "")
+	if err != nil {
+		return nil, fmt.Errorf("parse filter for index failed: %w", err)
+	} else {
+		withObjectClass := true
+		if len(matches) > 1 {
+			// NOTE(longsleep): In case of more than one filter, we remove the
+			// index lookup for objectClass since pretty much everything has
+			// an object class anyways and our index lookup does not support
+			// "and" lookups. Thus this gains a lot of efficiency.
+			for _, f := range matches {
+				if !strings.EqualFold("objectClass", f[1]) {
+					withObjectClass = false
+					break
+				}
+			}
+		}
+		for _, f := range matches {
+			if !withObjectClass && strings.EqualFold("objectClass", f[1]) {
+				continue
+			}
+			result = append(result, f[1:])
+		}
+	}
+	return result, err
+}
+
+func parseFilterMatchLeavesForIndex(f *ber.Packet, parent [][]string, level string) ([][]string, error) {
+	var err error
+
+	if parent == nil {
+		parent = make([][]string, 0)
+	}
+
+	switch f.Tag {
+	case ldapserver.FilterEqualityMatch:
+		if len(f.Children) != 2 {
+			return nil, errors.New("unsupported number of children in equality match filter")
+		}
+		attribute := f.Children[0].Value.(string)
+		value := f.Children[1].Value.(string)
+		parent = append(parent, []string{level, attribute, "eq", value})
+
+	case ldapserver.FilterPresent:
+		if len(f.Children) != 0 {
+			return nil, errors.New("unsupported number of children in presence match filter")
+		}
+		attribute := f.Data.String()
+		parent = append(parent, []string{level, attribute, "pres", ""})
+
+	case ldapserver.FilterSubstrings:
+		if len(f.Children) != 2 {
+			return nil, errors.New("unsupported number of children in substrings filter")
+		}
+		attribute := f.Children[0].Value.(string)
+		if len(f.Children[1].Children) != 1 {
+			return nil, errors.New("unsupported number of children in substrings filter")
+		}
+		value := f.Children[1].Children[0].Value.(string)
+		switch f.Children[1].Children[0].Tag {
+		case ldapserver.FilterSubstringsInitial, ldapserver.FilterSubstringsAny, ldapserver.FilterSubstringsFinal:
+			parent = append(parent, []string{level, attribute, "sub", value, strconv.FormatInt(int64(f.Children[1].Children[0].Tag), 10)})
+		}
+
+	case ldapserver.FilterAnd:
+		for idx, child := range f.Children {
+			parent, err = parseFilterMatchLeavesForIndex(child, parent, fmt.Sprintf("%s.&%d", level, idx))
+			if err != nil {
+				return nil, err
+			}
+		}
+
+	case ldapserver.FilterOr:
+		for idx, child := range f.Children {
+			parent, err = parseFilterMatchLeavesForIndex(child, parent, fmt.Sprintf("%s.|%d", level, idx))
+			if err != nil {
+				return nil, err
+			}
+		}
+
+	case ldapserver.FilterNot:
+		// Ignored for now.
+
+	default:
+	}
+
+	return parent, nil
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/handler.go

@@ -0,0 +1,512 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+import (
+	"context"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync/atomic"
+	"time"
+
+	"github.com/go-ldap/ldap/v3"
+	"github.com/go-ldap/ldif"
+	"github.com/longsleep/rndm"
+	cmap "github.com/orcaman/concurrent-map"
+	"github.com/sirupsen/logrus"
+
+	"github.com/libregraph/idm/pkg/ldapdn"
+	"github.com/libregraph/idm/pkg/ldapserver"
+	"github.com/libregraph/idm/server/handler"
+)
+
+type ldifHandler struct {
+	logger  logrus.FieldLogger
+	fn      string
+	options *Options
+
+	baseDN                  string
+	adminDN                 string
+	allowLocalAnonymousBind bool
+
+	ctx context.Context
+
+	current atomic.Value
+
+	activeSearchPagings cmap.ConcurrentMap
+}
+
+var _ handler.Handler = (*ldifHandler)(nil) // Verify that *ldifHandler implements handler.Handler.
+
+func NewLDIFHandler(logger logrus.FieldLogger, fn string, options *Options) (handler.Handler, error) {
+	if fn == "" {
+		return nil, fmt.Errorf("file name is empty")
+	}
+	if options.BaseDN == "" {
+		return nil, fmt.Errorf("base dn is empty")
+	}
+
+	fn, err := filepath.Abs(fn)
+	if err != nil {
+		return nil, err
+	}
+	logger = logger.WithField("fn", fn)
+
+	h := &ldifHandler{
+		logger:  logger,
+		fn:      fn,
+		options: options,
+
+		allowLocalAnonymousBind: options.AllowLocalAnonymousBind,
+
+		ctx: context.Background(),
+
+		activeSearchPagings: cmap.New(),
+	}
+	if h.baseDN, err = ldapdn.ParseNormalize(options.BaseDN); err != nil {
+		return nil, err
+	}
+	if h.adminDN, err = ldapdn.ParseNormalize(options.AdminDN); err != nil {
+		return nil, err
+	}
+
+	err = h.open()
+	if err != nil {
+		return nil, err
+	}
+
+	return h, nil
+}
+
+func (h *ldifHandler) open() error {
+	if !strings.EqualFold(h.options.BaseDN, h.baseDN) {
+		return fmt.Errorf("mismatched BaseDN")
+	}
+
+	info, err := os.Stat(h.fn)
+	if err != nil {
+		return fmt.Errorf("failed to open LDIF: %w", err)
+	}
+
+	var l *ldif.LDIF
+	index := newIndexMapRegister()
+
+	if info.IsDir() {
+		h.logger.Debugln("loading LDIF files from folder")
+		h.options.templateBasePath = h.fn
+		var parseErrors []error
+		l, parseErrors, err = parseLDIFDirectory(h.fn, h.options)
+		if err != nil {
+			return err
+		}
+		if len(parseErrors) > 0 {
+			for _, parseErr := range parseErrors {
+				h.logger.WithError(parseErr).Errorln("LDIF error")
+			}
+			return fmt.Errorf("error in LDIF files")
+		}
+	} else {
+		h.logger.Debugln("loading LDIF")
+		h.options.templateBasePath = filepath.Dir(h.fn)
+		l, err = parseLDIFFile(h.fn, h.options)
+		if err != nil {
+			return err
+		}
+	}
+
+	t, err := treeFromLDIF(l, index, h.options)
+	if err != nil {
+		return err
+	}
+
+	// Store parsed data as memory value.
+	value := &ldifMemoryValue{
+		l: l,
+		t: t,
+
+		index: index,
+	}
+	h.current.Store(value)
+
+	h.logger.WithFields(logrus.Fields{
+		"version":       l.Version,
+		"entries_count": len(l.Entries),
+		"tree_length":   t.Len(),
+		"base_dn":       h.options.BaseDN,
+		"indexes":       len(index),
+	}).Debugln("loaded LDIF")
+
+	return nil
+}
+
+func (h *ldifHandler) load() *ldifMemoryValue {
+	value := h.current.Load()
+	return value.(*ldifMemoryValue)
+}
+
+func (h *ldifHandler) WithContext(ctx context.Context) handler.Handler {
+	if ctx == nil {
+		panic("nil context")
+	}
+
+	h2 := new(ldifHandler)
+	*h2 = *h
+	h2.ctx = ctx
+	return h2
+}
+
+func (h *ldifHandler) Reload(ctx context.Context) error {
+	return h.open()
+}
+
+func (h *ldifHandler) Add(_ string, _ *ldap.AddRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifHandler) Bind(bindDN, bindSimplePw string, conn net.Conn) (ldapserver.LDAPResultCode, error) {
+	bindDN = strings.ToLower(bindDN)
+
+	logger := h.logger.WithFields(logrus.Fields{
+		"bind_dn":     bindDN,
+		"remote_addr": conn.RemoteAddr().String(),
+	})
+
+	if err := h.validateBindDN(bindDN, conn); err != nil {
+		logger.WithError(err).Debugln("ldap bind request BindDN validation failed")
+		return ldap.LDAPResultInsufficientAccessRights, nil
+	}
+
+	if bindSimplePw == "" {
+		logger.Debugf("ldap anonymous bind request")
+		if bindDN == "" {
+			return ldap.LDAPResultSuccess, nil
+		} else {
+			return ldap.LDAPResultUnwillingToPerform, nil
+		}
+	} else {
+		logger.Debugf("ldap bind request")
+	}
+
+	current := h.load()
+
+	entryRecord, found := current.t.Get([]byte(bindDN))
+	if !found {
+		err := fmt.Errorf("user not found")
+		logger.WithError(err).Debugf("ldap bind error")
+		return ldap.LDAPResultInvalidCredentials, nil
+	}
+	entry := entryRecord.(*ldifEntry)
+
+	if err := entry.validatePassword(bindSimplePw); err != nil {
+		logger.WithError(err).Debugf("ldap bind credentials error")
+		return ldap.LDAPResultInvalidCredentials, nil
+	}
+	return ldap.LDAPResultSuccess, nil
+}
+
+func (h *ldifHandler) Delete(_ string, _ *ldap.DelRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifHandler) Modify(_ string, _ *ldap.ModifyRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifHandler) ModifyDN(_ string, _ *ldap.ModifyDNRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifHandler) ModifyPasswordExop(_ string, _ *ldap.PasswordModifyRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifHandler) Search(bindDN string, searchReq *ldap.SearchRequest, conn net.Conn) (ldapserver.ServerSearchResult, error) {
+	bindDN = strings.ToLower(bindDN)
+	searchBaseDN := strings.ToLower(searchReq.BaseDN)
+	logger := h.logger.WithFields(logrus.Fields{
+		"bind_dn":        bindDN,
+		"search_base_dn": searchBaseDN,
+		"remote_addr":    conn.RemoteAddr().String(),
+		"controls":       searchReq.Controls,
+		"size_limit":     searchReq.SizeLimit,
+	})
+
+	logger.Debugf("ldap search request for %s", searchReq.Filter)
+
+	if err := h.validateBindDN(bindDN, conn); err != nil {
+		logger.WithError(err).Debugln("ldap search request BindDN validation failed")
+		return ldapserver.ServerSearchResult{
+			ResultCode: ldap.LDAPResultInsufficientAccessRights,
+		}, err
+	}
+
+	indexFilter, _ := parseFilterToIndexFilter(searchReq.Filter)
+
+	if !strings.HasSuffix(searchBaseDN, h.baseDN) {
+		err := fmt.Errorf("ldap search BaseDN is not in our BaseDN %s", h.baseDN)
+		return ldapserver.ServerSearchResult{
+			ResultCode: ldap.LDAPResultInsufficientAccessRights,
+		}, err
+	}
+
+	doneControls := []ldap.Control{}
+	var pagingControl *ldap.ControlPaging
+	var pagingCookie []byte
+	if paging := ldap.FindControl(searchReq.Controls, ldap.ControlTypePaging); paging != nil {
+		pagingControl = paging.(*ldap.ControlPaging)
+		if searchReq.SizeLimit > 0 && pagingControl.PagingSize >= uint32(searchReq.SizeLimit) {
+			pagingControl = nil
+		} else {
+			pagingCookie = pagingControl.Cookie
+		}
+	}
+
+	pumpCh, resultCode := func() (<-chan *ldifEntry, ldapserver.LDAPResultCode) {
+		var pumpCh chan *ldifEntry
+		var start = true
+		if pagingControl != nil {
+			if len(pagingCookie) == 0 {
+				pagingCookie = []byte(base64.RawStdEncoding.EncodeToString(rndm.GenerateRandomBytes(8)))
+				pagingControl.Cookie = pagingCookie
+				pumpCh = make(chan *ldifEntry)
+				h.activeSearchPagings.Set(string(pagingControl.Cookie), pumpCh)
+				logger.WithField("paging_cookie", string(pagingControl.Cookie)).Debugln("ldap search paging pump start")
+			} else {
+				pumpChRecord, ok := h.activeSearchPagings.Get(string(pagingControl.Cookie))
+				if !ok {
+					return nil, ldap.LDAPResultUnwillingToPerform
+				}
+				if pagingControl.PagingSize > 0 {
+					logger.WithField("paging_cookie", string(pagingControl.Cookie)).Debugln("ldap search paging pump continue")
+					pumpCh = pumpChRecord.(chan *ldifEntry)
+					start = false
+				} else {
+					// No paging size with cookie, means abandon.
+					start = false
+					logger.WithField("paging_cookie", string(pagingControl.Cookie)).Debugln("search paging pump abandon")
+					// TODO(longsleep): Cancel paging pump context.
+					h.activeSearchPagings.Remove(string(pagingControl.Cookie))
+				}
+			}
+		} else {
+			pumpCh = make(chan *ldifEntry)
+		}
+		if start {
+			current := h.load()
+			go h.searchEntriesPump(h.ctx, current, pumpCh, searchReq, pagingControl, indexFilter)
+		}
+
+		return pumpCh, ldap.LDAPResultSuccess
+	}()
+	if resultCode != ldap.LDAPResultSuccess {
+		err := fmt.Errorf("search unable to perform: %d", resultCode)
+		return ldapserver.ServerSearchResult{
+			ResultCode: resultCode,
+		}, err
+	}
+
+	filterPacket, err := ldapserver.CompileFilter(searchReq.Filter)
+	if err != nil {
+		return ldapserver.ServerSearchResult{
+			ResultCode: ldap.LDAPResultOperationsError,
+		}, err
+	}
+
+	var entryRecord *ldifEntry
+	var entries []*ldap.Entry
+	var entry *ldap.Entry
+	var count uint32
+	var keep bool
+results:
+	for {
+		select {
+		case entryRecord = <-pumpCh:
+			if entryRecord == nil {
+				// All done, set cookie to empty.
+				pagingCookie = []byte{}
+				break results
+
+			} else {
+				entry = entryRecord.Entry
+
+				// Apply filter.
+				keep, resultCode = ldapserver.ServerApplyFilter(filterPacket, entry)
+				if resultCode != ldap.LDAPResultSuccess {
+					return ldapserver.ServerSearchResult{
+						ResultCode: resultCode,
+					}, errors.New("search filter apply error")
+				}
+				if !keep {
+					continue
+				}
+
+				// Filter scope.
+				keep, resultCode = ldapserver.ServerFilterScope(searchReq.BaseDN, searchReq.Scope, entry)
+				if resultCode != ldap.LDAPResultSuccess {
+					return ldapserver.ServerSearchResult{
+						ResultCode: resultCode,
+					}, errors.New("search scope apply error")
+				}
+				if !keep {
+					continue
+				}
+
+				// Make a copy, before filtering attributes.
+				e := &ldap.Entry{
+					DN:         entry.DN,
+					Attributes: make([]*ldap.EntryAttribute, len(entry.Attributes)),
+				}
+				copy(e.Attributes, entry.Attributes)
+
+				// Filter attributes from entry.
+				resultCode, err = ldapserver.ServerFilterAttributes(searchReq.Attributes, e)
+				if err != nil {
+					return ldapserver.ServerSearchResult{
+						ResultCode: resultCode,
+					}, err
+				}
+
+				// Append entry as result.
+				entries = append(entries, e)
+
+				// Count and more.
+				count++
+				if pagingControl != nil {
+					if count >= pagingControl.PagingSize {
+						break results
+					}
+				}
+				if searchReq.SizeLimit > 0 && count >= uint32(searchReq.SizeLimit) {
+					// TODO(longsleep): handle total sizelimit for paging.
+					break results
+				}
+			}
+		}
+	}
+
+	if pagingControl != nil {
+		doneControls = append(doneControls, &ldap.ControlPaging{
+			PagingSize: 0,
+			Cookie:     pagingCookie,
+		})
+	}
+
+	return ldapserver.ServerSearchResult{
+		Entries:    entries,
+		Referrals:  []string{},
+		Controls:   doneControls,
+		ResultCode: ldap.LDAPResultSuccess,
+	}, nil
+}
+
+func (h *ldifHandler) searchEntriesPump(ctx context.Context, current *ldifMemoryValue, pumpCh chan<- *ldifEntry, searchReq *ldap.SearchRequest, pagingControl *ldap.ControlPaging, indexFilter [][]string) {
+	defer func() {
+		if pagingControl != nil {
+			h.activeSearchPagings.Remove(string(pagingControl.Cookie))
+			close(pumpCh)
+			h.logger.WithField("paging_cookie", string(pagingControl.Cookie)).Debugln("ldap search paging pump ended")
+		} else {
+			close(pumpCh)
+		}
+	}()
+
+	pump := func(entryRecord *ldifEntry) bool {
+		select {
+		case pumpCh <- entryRecord:
+		case <-ctx.Done():
+			if pagingControl != nil {
+				h.logger.WithField("paging_cookie", string(pagingControl.Cookie)).Warnln("ldap search paging pump context done")
+			} else {
+				h.logger.Warnln("ldap search pump context done")
+			}
+			return false
+		case <-time.After(1 * time.Minute):
+			if pagingControl != nil {
+				h.logger.WithField("paging_cookie", string(pagingControl.Cookie)).Warnln("ldap search paging pump timeout")
+			} else {
+				h.logger.Warnln("ldap search pump timeout")
+			}
+			return false
+		}
+		return true
+	}
+
+	searchBaseDN := strings.ToLower(searchReq.BaseDN)
+
+	load := true
+	if len(indexFilter) > 0 {
+		// Get entries with help of index.
+		load = false
+		var results []*[]*ldifEntry
+		for _, f := range indexFilter {
+			indexed, found := current.index.Load(f[0], f[1], f[2:]...)
+			if !found {
+				load = true
+				break
+			}
+			results = append(results, &indexed)
+		}
+		if !load {
+			cache := make(map[*ldifEntry]struct{})
+			for _, indexed := range results {
+				for _, entryRecord := range *indexed {
+					if _, cached := cache[entryRecord]; cached {
+						// Prevent duplicates.
+						continue
+					}
+					if strings.HasSuffix(entryRecord.DN, searchBaseDN) {
+						if ok := pump(entryRecord); !ok {
+							return
+						}
+					}
+					cache[entryRecord] = struct{}{}
+				}
+			}
+		}
+	}
+	if load {
+		// Walk through all entries (this is slow).
+		h.logger.WithField("filter", searchReq.Filter).Warnln("ldap search filter does not match any index, using slow walk")
+		current.t.WalkSuffix([]byte(searchBaseDN), func(key []byte, entryRecord interface{}) bool {
+			if ok := pump(entryRecord.(*ldifEntry)); !ok {
+				return true
+			}
+			return false
+		})
+	}
+}
+
+func (h *ldifHandler) validateBindDN(bindDN string, conn net.Conn) error {
+	if bindDN == "" {
+		if h.allowLocalAnonymousBind {
+			host, _, _ := net.SplitHostPort(conn.RemoteAddr().String())
+			if net.ParseIP(host).IsLoopback() {
+				return nil
+			}
+			return fmt.Errorf("anonymous BindDN rejected")
+		}
+		return fmt.Errorf("anonymous BindDN not allowed")
+	}
+
+	if strings.HasSuffix(bindDN, h.baseDN) {
+		return nil
+	}
+	return fmt.Errorf("the BindDN is not in our BaseDN: %s", h.baseDN)
+}
+
+func (h *ldifHandler) Close(bindDN string, conn net.Conn) error {
+	h.logger.WithFields(logrus.Fields{
+		"bind_dn":     bindDN,
+		"remote_addr": conn.RemoteAddr().String(),
+	}).Debugln("ldap close")
+
+	return nil
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/index.go

@@ -0,0 +1,225 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+import (
+	"strconv"
+	"strings"
+
+	"github.com/armon/go-radix"
+	"github.com/libregraph/idm/pkg/ldapserver"
+	"github.com/spacewander/go-suffix-tree"
+)
+
+var indexAttributes = map[string]string{
+	"entryCSN":     "eq",
+	"entryUUID":    "eq",
+	"objectClass":  "eq",
+	"cn":           "pres,eq,sub",
+	"gidNumber":    "eq",
+	"mail":         "pres,eq,sub",
+	"memberUid":    "eq",
+	"ou":           "eq",
+	"uid":          "eq",
+	"uidNumber":    "eq",
+	"uniqueMember": "eq",
+
+	"sn":        "pres,eq,sub",
+	"givenName": "pres,eq,sub",
+
+	"mailAlternateAddress": "eq",
+
+	// Additional indexes for attributes usually used with AD.
+	"objectGUID":     "eq",
+	"objectSID":      "eq",
+	"otherMailbox":   "eq",
+	"samAccountName": "eq",
+}
+
+func AddIndexAttribute(name string, indices string) {
+	indexAttributes[name] = indices
+}
+
+func RemoveIndexAttribute(name string) {
+	delete(indexAttributes, name)
+}
+
+type Index interface {
+	Add(name, op string, values []string, entry *ldifEntry) bool
+	Load(name, op string, params ...string) ([]*ldifEntry, bool)
+}
+
+type indexMap map[string][]*ldifEntry
+
+func newIndexMap() indexMap {
+	return make(indexMap)
+}
+
+func (im indexMap) Add(name, op string, values []string, entry *ldifEntry) bool {
+	for _, value := range values {
+		value = strings.ToLower(value)
+		im[value] = append(im[value], entry)
+	}
+	return true
+}
+
+func (im indexMap) Load(name, op string, value ...string) ([]*ldifEntry, bool) {
+	entries := im[strings.ToLower(value[0])]
+	return entries, true
+}
+
+type indexSuffixTree struct {
+	t *suffix.Tree
+}
+
+func newIndexSuffixTree() *indexSuffixTree {
+	return &indexSuffixTree{
+		t: suffix.NewTree(),
+	}
+}
+
+func (ist indexSuffixTree) Add(name, op string, values []string, entry *ldifEntry) bool {
+	for _, value := range values {
+		sfx := []byte(value)
+		var entries []*ldifEntry
+		if v, ok := ist.t.Get(sfx); ok {
+			entries = v.([]*ldifEntry)
+		}
+		entries = append(entries, entry)
+		ist.t.Insert(sfx, entries)
+	}
+	return true
+}
+
+func (ist indexSuffixTree) Load(name, op string, value ...string) ([]*ldifEntry, bool) {
+	var entries []*ldifEntry
+	sfx := []byte(value[0])
+	ist.t.WalkSuffix(sfx, func(key []byte, value interface{}) bool {
+		entries = append(entries, value.([]*ldifEntry)...)
+		return false
+	})
+	return entries, true
+}
+
+type indexRadixTree struct {
+	t *radix.Tree
+}
+
+func newIndexRadixTree() *indexRadixTree {
+	return &indexRadixTree{
+		t: radix.New(),
+	}
+}
+
+func (irt *indexRadixTree) Add(name, op string, values []string, entry *ldifEntry) bool {
+	for _, value := range values {
+		pfx := value
+		var entries []*ldifEntry
+		if v, ok := irt.t.Get(pfx); ok {
+			entries = v.([]*ldifEntry)
+		}
+		entries = append(entries, entry)
+		irt.t.Insert(pfx, entries)
+	}
+	return true
+}
+
+func (irt *indexRadixTree) Load(name, op string, value ...string) ([]*ldifEntry, bool) {
+	var entries []*ldifEntry
+	pfx := value[0]
+	irt.t.WalkPrefix(pfx, func(key string, value interface{}) bool {
+		entries = append(entries, value.([]*ldifEntry)...)
+		return false
+	})
+	return entries, true
+}
+
+type indexSubTree struct {
+	pres indexMap
+	irt  *indexRadixTree
+	ist  *indexSuffixTree
+}
+
+func newIndexSubTree() *indexSubTree {
+	return &indexSubTree{
+		pres: newIndexMap(),
+		irt:  newIndexRadixTree(),
+		ist:  newIndexSuffixTree(),
+	}
+}
+
+func (idx *indexSubTree) Add(name, op string, values []string, entry *ldifEntry) bool {
+	ok0 := idx.pres.Add(name, op, []string{""}, entry)
+	ok1 := idx.irt.Add(name, op, values, entry)
+	ok2 := idx.ist.Add(name, op, values, entry)
+	return ok0 || ok1 || ok2
+}
+
+func (idx *indexSubTree) Load(name, op string, params ...string) ([]*ldifEntry, bool) {
+	if len(params) != 2 {
+		// Require one value and sub tag.
+		return nil, false
+	}
+	tag, err := strconv.ParseInt(params[1], 10, 64)
+	if err != nil {
+		panic(err)
+	}
+
+	switch tag {
+	case ldapserver.FilterSubstringsAny:
+		// TODO(longsleep): Find a suitable way for full text search substring
+		// matching, for example with Knuth-Morris-Pratt algorithm. Currently
+		// we just do a presence match.
+		return idx.pres.Load(name, op, "")
+	case ldapserver.FilterSubstringsInitial:
+		return idx.irt.Load(name, op, params[0])
+	case ldapserver.FilterSubstringsFinal:
+		return idx.ist.Load(name, op, params[0])
+	default:
+		return nil, false
+	}
+}
+
+type indexMapRegister map[string]Index
+
+func newIndexMapRegister() indexMapRegister {
+	imr := make(indexMapRegister)
+	for name, ops := range indexAttributes {
+		for _, op := range strings.Split(ops, ",") {
+			switch op {
+			case "sub":
+				imr[imr.getKey(name, op)] = newIndexSubTree()
+			case "pres":
+				imr[imr.getKey(name, op)] = newIndexMap()
+			case "eq":
+				imr[imr.getKey(name, op)] = newIndexMap()
+			}
+		}
+	}
+	return imr
+}
+
+func (imr indexMapRegister) getKey(name, op string) string {
+	return strings.ToLower(name) + "," + op
+}
+
+func (imr indexMapRegister) Add(name, op string, values []string, entry *ldifEntry) bool {
+	index, ok := imr[imr.getKey(name, op)]
+	if !ok {
+		// No matching index, refuse to add.
+		return false
+	}
+	return index.Add(name, op, values, entry)
+}
+
+func (imr indexMapRegister) Load(name, op string, params ...string) ([]*ldifEntry, bool) {
+	index, ok := imr[imr.getKey(name, op)]
+	if !ok {
+		// No such index.
+		return nil, false
+	}
+	return index.Load(name, op, params...)
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/ldif.go

@@ -0,0 +1,190 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"text/template"
+
+	"github.com/go-ldap/ldap/v3"
+	"github.com/go-ldap/ldif"
+	"github.com/spacewander/go-suffix-tree"
+)
+
+// parseLDIFFile opens the named file for reading and parses it as LDIF.
+func parseLDIFFile(fn string, options *Options) (*ldif.LDIF, error) {
+	f, err := os.Open(fn)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var r io.Reader
+
+	if options.TemplateEngineDisabled {
+		r = f
+	} else {
+		r, err = parseLDIFTemplate(f, options, nil)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return parseLDIF(r, options)
+}
+
+// parseLDIFDirectory opens all ldif files in the given path in sorted order,
+// cats them all together and parses the result as LDIF.
+func parseLDIFDirectory(pn string, options *Options) (*ldif.LDIF, []error, error) {
+	matches, err := filepath.Glob(filepath.Join(pn, "*.ldif"))
+	if err != nil {
+		return nil, nil, err
+	}
+	sort.Slice(matches, func(i, j int) bool {
+		return matches[i] < matches[j]
+	})
+
+	var buf bytes.Buffer
+	var matchErrors []error
+	for _, match := range matches {
+		err = func() error {
+			f, openErr := os.Open(match)
+			if openErr != nil {
+				matchErrors = append(matchErrors, fmt.Errorf("file read error: %w", openErr))
+				return nil
+			}
+			defer f.Close()
+			if options.TemplateEngineDisabled {
+				_, copyErr := io.Copy(&buf, f)
+				if copyErr != nil {
+					return fmt.Errorf("file read error: %w", copyErr)
+				}
+			} else {
+				p, parseErr := parseLDIFTemplate(f, options, nil)
+				if parseErr != nil {
+					matchErrors = append(matchErrors, fmt.Errorf("parse error in %s: %w", match, parseErr))
+					return nil
+				}
+				_, copyErr := io.Copy(&buf, p)
+				if copyErr != nil {
+					return fmt.Errorf("template read error: %w", copyErr)
+				}
+			}
+			buf.WriteString("\n\n")
+			return nil
+		}()
+		if err != nil {
+			return nil, matchErrors, err
+		}
+	}
+
+	l, err := parseLDIF(&buf, options)
+	return l, matchErrors, err
+}
+
+// parseLDIFTemplate exectues the provided text template and then parses the
+// result as LDIF.
+func parseLDIFTemplate(r io.Reader, options *Options, m map[string]interface{}) (io.Reader, error) {
+	scanner := bufio.NewScanner(r)
+	scanner.Split(bufio.ScanLines)
+	var text []string
+	for scanner.Scan() {
+		t := scanner.Text()
+		if t != "" && t[0] == '#' {
+			// Ignore commented lines.
+			continue
+		}
+		text = append(text, scanner.Text())
+	}
+
+	if m == nil {
+		m = make(map[string]interface{})
+	}
+	tpl, err := template.New("tpl").Funcs(TemplateFuncs(m, options)).Parse(strings.Join(text, "\n"))
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse LDIF template: %w", err)
+	}
+
+	var buf bytes.Buffer
+	err = tpl.Execute(&buf, m)
+	if err != nil {
+		return nil, fmt.Errorf("failed to process LDIF template: %w", err)
+	}
+
+	if options.TemplateDebug {
+		fmt.Println("---\n", buf.String(), "\n----")
+	}
+
+	return &buf, nil
+}
+
+func parseLDIF(r io.Reader, options *Options) (*ldif.LDIF, error) {
+	l := &ldif.LDIF{}
+	err := ldif.Unmarshal(r, l)
+	if err != nil {
+		return nil, err
+	}
+
+	return l, nil
+}
+
+// treeFromLDIF makes a tree out of the provided LDIF and if index is not nil,
+// also indexes each entry in the provided index.
+func treeFromLDIF(l *ldif.LDIF, index Index, options *Options) (*suffix.Tree, error) {
+	t := suffix.NewTree()
+
+	// NOTE(longsleep): Create in memory tree records from LDIF data.
+	var entry *ldap.Entry
+	for _, entryRecord := range l.Entries {
+		if entryRecord == nil || entryRecord.Entry == nil {
+			// NOTE(longsleep): We don't use l.AllEntries as "nil" records can happen.
+			continue
+		}
+		entry = entryRecord.Entry
+		e := &ldifEntry{
+			Entry: &ldap.Entry{
+				DN: strings.ToLower(entry.DN),
+			},
+		}
+		for _, a := range entry.Attributes {
+			switch strings.ToLower(a.Name) {
+			case "userpassword":
+				// Don't include the password in the normal attributes.
+				e.UserPassword = &ldap.EntryAttribute{
+					Name:   a.Name,
+					Values: a.Values,
+				}
+			default:
+				// Append it.
+				e.Entry.Attributes = append(e.Entry.Attributes, &ldap.EntryAttribute{
+					Name:   a.Name,
+					Values: a.Values,
+				})
+			}
+			if index != nil {
+				// Index equalityMatch.
+				index.Add(a.Name, "eq", a.Values, e)
+				// Index present.
+				index.Add(a.Name, "pres", []string{""}, e)
+				// Index substrings.
+				index.Add(a.Name, "sub", a.Values, e)
+			}
+		}
+		v, ok := t.Insert([]byte(e.DN), e)
+		if !ok || v != nil {
+			return nil, fmt.Errorf("duplicate dn value: %s", e.DN)
+		}
+	}
+
+	return t, nil
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/memory.go

@@ -0,0 +1,18 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+import (
+	"github.com/go-ldap/ldif"
+	"github.com/spacewander/go-suffix-tree"
+)
+
+type ldifMemoryValue struct {
+	l *ldif.LDIF
+	t *suffix.Tree
+
+	index Index
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/middleware.go

@@ -0,0 +1,190 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"path/filepath"
+	"strings"
+	"sync/atomic"
+
+	"github.com/go-ldap/ldap/v3"
+	"github.com/sirupsen/logrus"
+
+	"github.com/libregraph/idm/pkg/ldapserver"
+	"github.com/libregraph/idm/server/handler"
+)
+
+type ldifMiddleware struct {
+	logger  logrus.FieldLogger
+	fn      string
+	options *Options
+
+	baseDN string
+
+	current atomic.Value
+
+	next handler.Handler
+}
+
+var _ handler.Handler = (*ldifMiddleware)(nil) // Verify that *configHandler implements handler.Handler.
+
+func NewLDIFMiddleware(logger logrus.FieldLogger, fn string, options *Options) (handler.Middleware, error) {
+	if fn == "" {
+		return nil, fmt.Errorf("file name is empty")
+	}
+	if options.BaseDN == "" {
+		return nil, fmt.Errorf("base dn is empty")
+	}
+
+	fn, err := filepath.Abs(fn)
+	if err != nil {
+		return nil, err
+	}
+	logger = logger.WithField("fn", fn)
+
+	h := &ldifMiddleware{
+		logger:  logger,
+		fn:      fn,
+		options: options,
+
+		baseDN: strings.ToLower(options.BaseDN),
+	}
+
+	err = h.open()
+	if err != nil {
+		return nil, err
+	}
+
+	return h, nil
+}
+
+func (h *ldifMiddleware) open() error {
+	if !strings.EqualFold(h.options.BaseDN, h.baseDN) {
+		return fmt.Errorf("mismatched BaseDN")
+	}
+
+	h.logger.Debugln("loading LDIF")
+	l, err := parseLDIFFile(h.fn, h.options)
+	if err != nil {
+		return err
+	}
+
+	t, err := treeFromLDIF(l, nil, h.options)
+	if err != nil {
+		return err
+	}
+
+	// Store parsed data as memory value.
+	value := &ldifMemoryValue{
+		t: t,
+	}
+	h.current.Store(value)
+
+	h.logger.WithFields(logrus.Fields{
+		"version":       l.Version,
+		"entries_count": len(l.Entries),
+		"tree_length":   t.Len(),
+		"base_dn":       h.options.BaseDN,
+	}).Debugln("loaded LDIF")
+
+	return nil
+}
+
+func (h *ldifMiddleware) load() *ldifMemoryValue {
+	value := h.current.Load()
+	return value.(*ldifMemoryValue)
+}
+
+func (h *ldifMiddleware) WithHandler(next handler.Handler) handler.Handler {
+	h.next = next
+
+	return h
+}
+
+func (h *ldifMiddleware) WithContext(ctx context.Context) handler.Handler {
+	if ctx == nil {
+		panic("nil context")
+	}
+
+	h2 := new(ldifMiddleware)
+	*h2 = *h
+	h2.next = h.next.WithContext(ctx)
+	return h2
+}
+
+func (h *ldifMiddleware) Reload(ctx context.Context) error {
+	err := h.open()
+	if err != nil {
+		return err
+	}
+
+	return h.next.Reload(ctx)
+}
+
+func (h *ldifMiddleware) Add(_ string, _ *ldap.AddRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifMiddleware) Bind(bindDN, bindSimplePw string, conn net.Conn) (resultCode ldapserver.LDAPResultCode, err error) {
+	bindDN = strings.ToLower(bindDN)
+
+	if bindSimplePw == "" { // Empty password means anonymous bind.
+		return h.next.Bind(bindDN, bindSimplePw, conn)
+	}
+
+	current := h.load()
+
+	entryRecord, found := current.t.Get([]byte(bindDN))
+	if found {
+		logger := h.logger.WithFields(logrus.Fields{
+			"bind_dn":     bindDN,
+			"remote_addr": conn.RemoteAddr().String(),
+		})
+
+		if !strings.HasSuffix(bindDN, h.baseDN) {
+			err := fmt.Errorf("the BindDN is not in our BaseDN %s", h.baseDN)
+			logger.WithError(err).Infoln("ldap bind error")
+			return ldap.LDAPResultInvalidCredentials, nil
+		}
+
+		if err := entryRecord.(*ldifEntry).validatePassword(bindSimplePw); err != nil {
+			logger.WithError(err).Infoln("bind error")
+			return ldap.LDAPResultInvalidCredentials, nil
+		}
+
+		return ldap.LDAPResultSuccess, nil
+	}
+
+	return h.next.Bind(bindDN, bindSimplePw, conn)
+}
+
+func (h *ldifMiddleware) Delete(_ string, _ *ldap.DelRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifMiddleware) Modify(_ string, _ *ldap.ModifyRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifMiddleware) ModifyDN(_ string, _ *ldap.ModifyDNRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifMiddleware) ModifyPasswordExop(_ string, _ *ldap.PasswordModifyRequest, _ net.Conn) (ldapserver.LDAPResultCode, error) {
+	return ldap.LDAPResultUnwillingToPerform, errors.New("unsupported operation")
+}
+
+func (h *ldifMiddleware) Search(bindDN string, searchReq *ldap.SearchRequest, conn net.Conn) (result ldapserver.ServerSearchResult, err error) {
+	return h.next.Search(bindDN, searchReq, conn)
+}
+
+func (h *ldifMiddleware) Close(bindDN string, conn net.Conn) error {
+	return h.next.Close(bindDN, conn)
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/options.go

@@ -0,0 +1,21 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+type Options struct {
+	BaseDN                  string
+	AdminDN                 string
+	AllowLocalAnonymousBind bool
+
+	DefaultCompany    string
+	DefaultMailDomain string
+
+	TemplateExtraVars      map[string]interface{}
+	TemplateEngineDisabled bool
+	TemplateDebug          bool
+
+	templateBasePath string
+}

Server/vendor/github.com/libregraph/idm/server/handler/ldif/template.go

@@ -0,0 +1,119 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021 The LibreGraph Authors.
+ */
+
+package ldif
+
+import (
+	"bytes"
+	"encoding/base64"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"text/template"
+
+	"github.com/libregraph/idm"
+)
+
+const formatAsFileSizeLimit int64 = 1024 * 1024
+
+func TemplateFuncs(m map[string]interface{}, options *Options) template.FuncMap {
+	defaults := map[string]interface{}{
+		"Company":    "Default",
+		"BaseDN":     idm.DefaultLDAPBaseDN,
+		"MailDomain": idm.DefaultMailDomain,
+	}
+	for k, v := range defaults {
+		if _, ok := m[k]; !ok {
+			m[k] = v
+		}
+	}
+	if options != nil {
+		if options.BaseDN != "" {
+			m["BaseDN"] = options.BaseDN
+		}
+		if options.DefaultCompany != "" {
+			m["Company"] = options.DefaultCompany
+		}
+		if options.DefaultMailDomain != "" {
+			m["MailDomain"] = options.DefaultMailDomain
+		}
+		for k, v := range options.TemplateExtraVars {
+			m[k] = v
+		}
+	}
+
+	autoIncrement := uint64(1000)
+	if v, ok := m["AutoIncrementMin"]; ok {
+		autoIncrement = v.(uint64)
+	}
+
+	basePath := options.templateBasePath
+
+	return template.FuncMap{
+		"WithCompany": func(value string) string {
+			m["Company"] = value
+			return ""
+		},
+		"WithBaseDN": func(value string) string {
+			m["BaseDN"] = value
+			return ""
+		},
+		"WithMailDomain": func(value string) string {
+			m["MailDomain"] = value
+			return ""
+		},
+		"AutoIncrement": func(values ...uint64) uint64 {
+			if len(values) > 0 {
+				autoIncrement = values[0]
+			} else {
+				autoIncrement++
+			}
+			return autoIncrement
+		},
+		"formatAsBase64": func(s string) string {
+			return base64.StdEncoding.EncodeToString([]byte(s))
+		},
+		"formatAsFileBase64": func(fn string) (string, error) {
+			if basePath == "" {
+				return "", fmt.Errorf("LDIF template fromFile failed, no base path")
+			}
+			fn = filepath.Clean(fn)
+			if !filepath.IsAbs(fn) {
+				fn = filepath.Join(basePath, fn)
+			}
+			fn, err := filepath.Abs(fn)
+			if err != nil {
+				return "", err
+			}
+			// NOTE(longsleep): Poor man base path check, should work well enough on Linux.
+			// See https://github.com/golang/go/issues/18358 for details.
+			if !strings.HasPrefix(fn, strings.TrimRight(basePath, "/")+"/") {
+				return "", fmt.Errorf("LDIF template formatAsFile %s outside of %s is not allowed", fn, basePath)
+			}
+
+			f, err := os.Open(fn)
+			if err != nil {
+				return "", fmt.Errorf("LDIF template formatAsFile open failed with error: %w", err)
+			}
+			defer f.Close()
+
+			reader := io.LimitReader(f, formatAsFileSizeLimit+1)
+
+			var buf bytes.Buffer
+			encoder := base64.NewEncoder(base64.StdEncoding, &buf)
+			n, err := io.Copy(encoder, reader)
+			if err != nil {
+				return "", fmt.Errorf("LDIF template formatAsFile error: %w", err)
+			}
+			if n > formatAsFileSizeLimit {
+				return "", fmt.Errorf("LDIF template formatAsFile size limit exceeded: %s", fn)
+			}
+
+			return buf.String(), nil
+		},
+	}
+}