File ldap-sebin-0.2.1.obscpio of Package ldap-sebin
07070100000000000041ED00000000000000000000000368C2895000000000000000000000000000000000000000000000001900000000ldap-sebin-0.2.1/.github07070100000001000041ED00000000000000000000000268C2895000000000000000000000000000000000000000000000002300000000ldap-sebin-0.2.1/.github/workflows07070100000002000081A400000000000000000000000168C289500000052B000000000000000000000000000000000000003000000000ldap-sebin-0.2.1/.github/workflows/pipeline.yml---
name: feature tests
# About security when running the tests and NOT exposing
# the secrets to externals. Currently Github Actions does
# NOT expose the secrets if the branch is coming from a forked
# repository.
# See: https://github.blog/2020-08-03-github-actions-improvements-for-fork-and-pull-request-workflows/
# See: https://docs.github.com/en/actions/security-guides/using-secrets-in-github-actions
#
# An alternate would be to set, pull_request_target but this takes the CI code
# from master removing the ability to change the code in a PR easily.
#
# Aditionally, since 2021 pull requests from new contributors will not
# trigger workflows automatically but will wait for approval from somebody
# with write access.
# See: https://docs.github.com/en/actions/managing-workflow-runs/approving-workflow-runs-from-public-forks
on:
- pull_request
- push
jobs:
unit-tests:
runs-on: ubuntu-latest
container:
image: registry.suse.com/bci/golang:1.25
options: --user root --privileged
steps:
- uses: actions/checkout@v4
- name: lint
run: |
if [[ ! -z $(gofmt -e -l cmd/ldap-sebin/) ]];
then
echo "Lint failed"
gofmt -e -d cmd/ldap-sebin/
exit 1
fi
- name: test
run: go test -v ./...
07070100000003000081A400000000000000000000000168C2895000000241000000000000000000000000000000000000001C00000000ldap-sebin-0.2.1/.gitignore# If you prefer the allow list template instead of the deny list, see community template:
# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
#
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, built with `go test -c`
*.test
# Code coverage profiles and other test artifacts
*.out
coverage.*
*.coverprofile
profile.cov
# Dependency directories (remove the comment below to include it)
# vendor/
# Go workspace file
go.work
go.work.sum
# env file
.env
# Editor/IDE
# .idea/
# .vscode/
config.yaml
out/
07070100000004000081A400000000000000000000000168C2895000002C4E000000000000000000000000000000000000001900000000ldap-sebin-0.2.1/LICENSE Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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Copyright 2025 José Gómez
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07070100000005000081A400000000000000000000000168C28950000000CB000000000000000000000000000000000000001A00000000ldap-sebin-0.2.1/Makefilebuild:
mkdir -p out/bin/
go build -o out/bin/ldap-sebin ./cmd/ldap-sebin/
mod-tidy:
go mod tidy
test:
go test -v ./cmd/...
go test -v ./internal/...
fmt:
go fmt ./cmd/...
go fmt ./internal/...
07070100000006000081A400000000000000000000000168C289500000002F000000000000000000000000000000000000001B00000000ldap-sebin-0.2.1/README.md# ldap-sebin
LDAP Search & Bind middleware
07070100000007000041ED00000000000000000000000368C2895000000000000000000000000000000000000000000000001500000000ldap-sebin-0.2.1/cmd07070100000008000041ED00000000000000000000000268C2895000000000000000000000000000000000000000000000002000000000ldap-sebin-0.2.1/cmd/ldap-sebin07070100000009000081A400000000000000000000000168C28950000015D2000000000000000000000000000000000000002800000000ldap-sebin-0.2.1/cmd/ldap-sebin/main.gopackage main
import (
"fmt"
"log"
"net"
"os"
"os/signal"
"syscall"
"errors"
"flag"
"github.com/josegomezr/ldap-sebin/internal/handler"
"github.com/merlinz01/ldapserver"
"gopkg.in/yaml.v3"
"strconv"
"sync"
)
type Cfg struct {
Verbose bool `yaml:"verbose"`
Upstream string `yaml:"upstream-server-url"`
ListenAddr string `yaml:"listen-address"`
ListenPort string `yaml:"listen-port"`
Certificate string `yaml:"certificate"`
Key string `yaml:"key"`
BaseDn string `yaml:"base-dn"`
FilterTemplate string `yaml:"filter-template"`
AllowedBindDn string `yaml:"allowed-bind-dn"`
}
func newHandler(cfg *Cfg) *handler.Handler {
return &handler.Handler{
AllowedBindDn: cfg.AllowedBindDn,
Verbose: cfg.Verbose,
Sessions: make(map[string]handler.Session),
LdapUrl: cfg.Upstream,
BaseDn: cfg.BaseDn,
FilterTemplate: cfg.FilterTemplate,
Mutex: &sync.Mutex{},
}
}
func newServer(cfg *Cfg) *ldapserver.LDAPServer {
handler := newHandler(cfg)
return ldapserver.NewLDAPServer(handler)
}
var ReadFile func(string) ([]byte, error) = os.ReadFile
var ErrBadConfigFile error = errors.New("Bad config file")
var ErrMissingRequired error = errors.New("Bad config file")
func enrichConfigFromFile(path string, cfg *Cfg) error {
data, err := ReadFile(path)
if err != nil {
return errors.Join(ErrBadConfigFile, err)
}
err = yaml.Unmarshal([]byte(data), cfg)
if err != nil {
return errors.Join(ErrBadConfigFile, err)
}
return nil
}
func enrichConfigFromEnv(cfg *Cfg) {
if val, found := os.LookupEnv("LDAP_SEBIN_UPSTREAM_SERVER_URL"); found {
if val == "" {
log.Printf("Ignoring empty LDAP_SEBIN_UPSTREAM_SERVER_URL value %q", val)
} else {
cfg.Upstream = val
}
}
if val, found := os.LookupEnv("LDAP_SEBIN_LISTEN_ADDRESS"); found {
if val == "" {
log.Printf("Ignoring empty LDAP_SEBIN_LISTEN_ADDRESS value %q", val)
} else {
cfg.ListenAddr = val
}
}
if val, found := os.LookupEnv("LDAP_SEBIN_CERTIFICATE"); found {
if val == "" {
log.Printf("Ignoring empty LDAP_SEBIN_CERTIFICATE value %q", val)
} else {
cfg.Certificate = val
}
}
if val, found := os.LookupEnv("LDAP_SEBIN_KEY"); found {
if val == "" {
log.Printf("Ignoring empty LDAP_SEBIN_KEY value %q", val)
} else {
cfg.Key = val
}
}
if val, found := os.LookupEnv("LDAP_SEBIN_BASE_DN"); found {
if val == "" {
log.Printf("Ignoring empty LDAP_SEBIN_BASE_DN value %q", val)
} else {
cfg.BaseDn = val
}
}
if val, found := os.LookupEnv("LDAP_SEBIN_FILTER_TEMPLATE"); found {
if val == "" {
log.Printf("Ignoring empty LDAP_SEBIN_FILTER_TEMPLATE value %q", val)
} else {
cfg.FilterTemplate = val
}
}
if val, found := os.LookupEnv("LDAP_SEBIN_LISTEN_PORT"); found {
if val == "" {
log.Printf("Ignoring empty LDAP_SEBIN_LISTEN_PORT value %q", val)
} else {
if _, err := strconv.Atoi(val); err == nil {
cfg.ListenPort = val
} else {
log.Printf("Ignoring invalid LDAP_SEBIN_LISTEN_PORT value %q", val)
}
}
}
if val, found := os.LookupEnv("LDAP_SEBIN_VERBOSE"); found {
if val == "" {
log.Printf("Ignoring empty LDAP_SEBIN_VERBOSE value")
} else {
if boolval, err := strconv.ParseBool(val); err == nil {
cfg.Verbose = boolval
} else {
log.Printf("Ignoring invalid LDAP_SEBIN_VERBOSE value %q", val)
}
}
}
}
func validateCfg(cfg *Cfg) error {
if cfg.Upstream == "" || cfg.BaseDn == "" {
return errors.Join(ErrMissingRequired, fmt.Errorf("Incomplete upstream configuration."))
}
return nil
}
var (
Version = "dev"
CommitHash = "n/a"
BuildTimestamp = "n/a" // If we wanna make it reproduceable, this should be commit date
)
func main() {
var nFlag = flag.Bool("v", false, "version")
flag.Parse()
if *nFlag {
fmt.Printf("ldap-sebin/%s\nCommit Hash: %s\nCommit Date: %s", Version, CommitHash, BuildTimestamp)
os.Exit(0)
}
cfg := &Cfg{}
if err := enrichConfigFromFile("./config.yaml", cfg); err != nil {
log.Printf("error reading config file: %+v. IGNORING", err)
}
enrichConfigFromEnv(cfg)
if err := validateCfg(cfg); err != nil {
log.Fatalf("Invalid config: %s", err)
}
if cfg.Verbose {
log.Printf("Parsed configuration")
log.Printf("---")
enc := yaml.NewEncoder(os.Stdout)
enc.Encode(*cfg)
log.Printf("---")
}
s := newServer(cfg)
listenAddr := cfg.ListenAddr
if listenAddr == "" {
listenAddr = "localhost"
}
var srvErr error
signals := make(chan os.Signal, 1)
signal.Notify(signals, os.Interrupt, syscall.SIGTERM)
go func() {
<-signals
fmt.Println()
log.Println("Shutting down.")
s.Shutdown()
}()
// TODO: make this prettier on the validation fn maybe a bool fn "tls
// enabled" on the config struct can make it easier.
listenFunc := s.ListenAndServe
var listenPort string
if !(cfg.Certificate == "" || cfg.Key == "") {
err := s.SetupTLS(cfg.Certificate, cfg.Key)
if err != nil {
log.Fatalf("TLS configuration failed: %s", err)
}
listenFunc = s.ListenAndServeTLS
if cfg.ListenPort != "" {
listenPort = cfg.ListenPort
} else {
listenPort = "636"
}
} else {
if cfg.ListenPort != "" {
listenPort = cfg.ListenPort
} else {
listenPort = "389"
}
log.Println("No certificate and/or key configured. Listening for plain text connections. This is NOT secure.")
}
serverAddr := net.JoinHostPort(listenAddr, listenPort)
log.Printf("Listening to %s", serverAddr)
srvErr = listenFunc(serverAddr)
if srvErr != nil {
log.Fatalf("Failed to start LDAP server: %s", srvErr)
}
}
0707010000000A000081A400000000000000000000000168C2895000001A2B000000000000000000000000000000000000002D00000000ldap-sebin-0.2.1/cmd/ldap-sebin/main_test.gopackage main
import (
"fmt"
ldap "github.com/go-ldap/ldap/v3"
"github.com/merlinz01/ldapserver"
"log"
"strings"
"testing"
"time"
)
var upstreamAddr = "127.254.1.1:3389"
var subjectAddr = "127.0.1.1:3389"
var upstreamServerUrl = "ldap://" + upstreamAddr
func fakeCfg() *Cfg {
return &Cfg{
Verbose: testing.Verbose(),
Upstream: upstreamServerUrl,
AllowedBindDn: "ou=Filterable OU,dc=other,dc=org",
ListenAddr: "",
ListenPort: "",
BaseDn: "ou=Translated Users,dc=example,dc=org",
FilterTemplate: "(equivalentUsername=$1)",
}
}
type fakeUpstreamHandler struct {
ldapserver.BaseHandler
baseDN string
searchResults []string
}
func (h fakeUpstreamHandler) Bind(conn *ldapserver.Conn, msg *ldapserver.Message, req *ldapserver.BindRequest) {
bindDN := req.Name
var result *ldapserver.Result
if bindDN == fmt.Sprintf("cn=AlwaysCorrect CN,%s", h.baseDN) {
result = ldapserver.ResultSuccess.AsResult("SUCCESS!")
} else {
result = ldapserver.ResultInvalidCredentials.AsResult("Failed auth")
}
conn.SendResult(msg.MessageID, nil, ldapserver.TypeBindResponseOp, result)
}
func makeSearchEntry(uid, base string) *ldapserver.SearchResultEntry {
cn := fmt.Sprintf("cn=%s CN", uid)
return &ldapserver.SearchResultEntry{
ObjectName: fmt.Sprintf("%s,%s", cn, base),
Attributes: []ldapserver.Attribute{
{Description: "cn", Values: []string{cn}},
{Description: "uid", Values: []string{uid}},
{Description: "givenname", Values: []string{fmt.Sprintf("Given Name %s", uid)}},
{Description: "sn", Values: []string{fmt.Sprintf("Last Name %s", uid)}},
},
}
}
func (h fakeUpstreamHandler) Search(conn *ldapserver.Conn, msg *ldapserver.Message, req *ldapserver.SearchRequest) {
if strings.HasSuffix(req.BaseObject, h.baseDN) {
for _, entry := range h.searchResults {
conn.SendResult(
msg.MessageID,
nil,
ldapserver.TypeSearchResultEntryOp,
makeSearchEntry(entry, h.baseDN),
)
}
}
conn.SendResult(msg.MessageID, nil, ldapserver.TypeSearchResultDoneOp, ldapserver.ResultSuccess.AsResult(""))
}
func shutdown(s *ldapserver.LDAPServer, name string) {
if testing.Verbose() {
log.Println("Stopping", name)
}
s.Shutdown()
}
func listen(s *ldapserver.LDAPServer, name, addr string, ready chan bool) {
if testing.Verbose() {
log.Println("Starting", name)
}
go func() {
time.Sleep(1 * time.Millisecond)
ready <- true
}()
s.ListenAndServe(addr)
}
func withServer(t *testing.T, handler ldapserver.Handler, fn func(*ldap.Conn)) {
t.Helper()
ready := make(chan bool, 1)
upstream := ldapserver.NewLDAPServer(handler)
go listen(upstream, "upstream", upstreamAddr, ready)
<-ready
defer shutdown(upstream, "upstream")
s := newServer(fakeCfg())
go listen(s, "local", subjectAddr, ready)
<-ready
defer shutdown(s, "local")
conn, err := ldap.DialURL("ldap://" + subjectAddr)
if err != nil {
t.Fatalf("Failed: %s", err)
}
fn(conn)
}
func TestSearchNoResults(t *testing.T) {
handler := &fakeUpstreamHandler{
baseDN: "dc=example,dc=org",
}
withServer(t, handler, func(conn *ldap.Conn) {
err := conn.Bind("uid=random,ou=Filterable OU,dc=other,dc=org", "password")
if err == nil {
t.Fatalf("expected failure")
}
if !ldap.IsErrorWithCode(err, ldap.LDAPResultNoSuchObject) {
t.Fatalf("Expected LDAPResultNoSuchObject, got=%q", err)
}
})
}
func TestSearchResultsBadPW(t *testing.T) {
handler := &fakeUpstreamHandler{
baseDN: "dc=example,dc=org",
searchResults: []string{"random"},
}
withServer(t, handler, func(conn *ldap.Conn) {
err := conn.Bind("uid=random,ou=Filterable OU,dc=other,dc=org", "password")
if err == nil {
t.Fatalf("expected failure")
}
if !ldap.IsErrorWithCode(err, ldap.LDAPResultInvalidCredentials) {
t.Fatalf("Expected LDAPResultNoSuchObject, got=%q", err)
}
})
}
func TestSearchOutsideOfAllowedDN(t *testing.T) {
handler := &fakeUpstreamHandler{
baseDN: "ou=Translated Users,dc=example,dc=org",
}
withServer(t, handler, func(conn *ldap.Conn) {
err := conn.Bind("uid=who-cares-this-has-to-fail,ou=NotYourOU,dc=wooooooo,dc=org", "password")
if err == nil {
t.Fatalf("expected failure")
}
if !ldap.IsErrorWithCode(err, ldap.LDAPResultInsufficientAccessRights) {
t.Fatalf("Expected LDAPResultInsufficientAccessRights, got=%q", err)
}
})
}
func TestSearchResultsCorrectPW(t *testing.T) {
handler := &fakeUpstreamHandler{
baseDN: "ou=Translated Users,dc=example,dc=org",
searchResults: []string{"AlwaysCorrect"},
}
withServer(t, handler, func(conn *ldap.Conn) {
err := conn.Bind("uid=this-must-work,ou=Filterable OU,dc=other,dc=org", "password")
if err != nil {
t.Fatalf("failed: %s", err)
}
})
}
func TestConfigFileEmpty(t *testing.T) {
orig := ReadFile
defer func() { ReadFile = orig }()
ReadFile = func(string) ([]byte, error) {
return []byte("---"), nil
}
cfg := &Cfg{}
err := enrichConfigFromFile("", cfg)
if err != nil {
t.Fatalf("failed: %s", err)
}
}
func TestConfigFileRequired(t *testing.T) {
orig := ReadFile
defer func() { ReadFile = orig }()
ReadFile = func(string) ([]byte, error) {
return []byte(
"---" + "\n" +
`upstream-server-url: ldap://your-ldap-server.example.com` + "\n" +
`base-dn: "ou=Fun User Accounts,dc=company,dc=tld"` + "\n" +
`...` + "\n",
), nil
}
cfg := &Cfg{}
err := enrichConfigFromFile("", cfg)
if err != nil {
t.Fatalf("failed: %s", err)
}
if cfg.Upstream != "ldap://your-ldap-server.example.com" {
t.Fatalf("failed pulling cfg from yaml file. got=%q", cfg.Upstream)
}
if cfg.BaseDn != "ou=Fun User Accounts,dc=company,dc=tld" {
t.Fatalf("failed pulling cfg from yaml file. got=%q", cfg.BaseDn)
}
}
func TestConfigEnvs(t *testing.T) {
cfg := &Cfg{}
enrichConfigFromEnv(cfg)
if cfg.Upstream != "" {
t.Fatalf("failed pulling cfg from yaml file. got=%q", cfg.Upstream)
}
if cfg.BaseDn != "" {
t.Fatalf("failed pulling cfg from yaml file. got=%q", cfg.BaseDn)
}
}
func TestValidateCfg(t *testing.T) {
cfgs := []struct {
cfg Cfg
shouldError bool
}{
{
cfg: Cfg{
Upstream: "",
BaseDn: "",
},
shouldError: true,
},
{
cfg: Cfg{
Upstream: "ldap://something",
BaseDn: "",
},
shouldError: true,
},
{
cfg: Cfg{
Upstream: "ldap://something",
BaseDn: "dc=a,dc=b",
},
shouldError: false,
},
}
for _, expectation := range cfgs {
if err := validateCfg(&expectation.cfg); (err == nil) == expectation.shouldError {
if expectation.shouldError {
t.Fatalf("Failed, expected error: %+v", expectation.cfg)
} else {
t.Fatalf("Failed, unexpected error: %+v", expectation.cfg)
}
}
}
}
0707010000000B000081A400000000000000000000000168C289500000021A000000000000000000000000000000000000002500000000ldap-sebin-0.2.1/config.example.yaml---
# LDAP URI to forward requests to
upstream-server-url: ldaps://your-ldap-server.example.com
# address or name to bind on (optional, defaults to localhost)
listen-address: ipv6-localhost
# port to bind on (optional, defaults to 389 if certificate/key are not set, else 636)
listen-port: 3389
# certificate and private key to enable TLS listener (optional, defaults to plain text listener)
certificate: /etc/ssl/ldap.crt
key: /etc/ssl/ldap.key
base-dn: "ou=Fun User Accounts,dc=company,dc=tld"
filter-template: "(|(customUsername=$1))"
0707010000000C000081A400000000000000000000000168C28950000001A5000000000000000000000000000000000000001800000000ldap-sebin-0.2.1/go.modmodule github.com/josegomezr/ldap-sebin
go 1.23.0
require (
github.com/go-ldap/ldap/v3 v3.4.11
github.com/merlinz01/ldapserver v0.0.16
gopkg.in/yaml.v3 v3.0.1
)
require (
github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 // indirect
github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667 // indirect
github.com/google/uuid v1.6.0 // indirect
golang.org/x/crypto v0.36.0 // indirect
)
0707010000000D000081A400000000000000000000000168C2895000000E4E000000000000000000000000000000000000001800000000ldap-sebin-0.2.1/go.sumgithub.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 h1:mFRzDkZVAjdal+s7s0MwaRv9igoPqLRdzOLzw/8Xvq8=
github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa h1:LHTHcTQiSGT7VVbI0o4wBRNQIgn917usHWOd6VAffYI=
github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667 h1:BP4M0CvQ4S3TGls2FvczZtj5Re/2ZzkV9VwqPHH/3Bo=
github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
github.com/go-ldap/ldap/v3 v3.4.11 h1:4k0Yxweg+a3OyBLjdYn5OKglv18JNvfDykSoI8bW0gU=
github.com/go-ldap/ldap/v3 v3.4.11/go.mod h1:bY7t0FLK8OAVpp/vV6sSlpz3EQDGcQwc8pF0ujLgKvM=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/hashicorp/go-uuid v1.0.3 h1:2gKiV6YVmrJ1i2CKKa9obLvRieoRGviZFL26PcT/Co8=
github.com/hashicorp/go-uuid v1.0.3/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
github.com/jcmturner/aescts/v2 v2.0.0 h1:9YKLH6ey7H4eDBXW8khjYslgyqG2xZikXP0EQFKrle8=
github.com/jcmturner/aescts/v2 v2.0.0/go.mod h1:AiaICIRyfYg35RUkr8yESTqvSy7csK90qZ5xfvvsoNs=
github.com/jcmturner/dnsutils/v2 v2.0.0 h1:lltnkeZGL0wILNvrNiVCR6Ro5PGU/SeBvVO/8c/iPbo=
github.com/jcmturner/dnsutils/v2 v2.0.0/go.mod h1:b0TnjGOvI/n42bZa+hmXL+kFJZsFT7G4t3HTlQ184QM=
github.com/jcmturner/gofork v1.7.6 h1:QH0l3hzAU1tfT3rZCnW5zXl+orbkNMMRGJfdJjHVETg=
github.com/jcmturner/gofork v1.7.6/go.mod h1:1622LH6i/EZqLloHfE7IeZ0uEJwMSUyQ/nDd82IeqRo=
github.com/jcmturner/goidentity/v6 v6.0.1 h1:VKnZd2oEIMorCTsFBnJWbExfNN7yZr3EhJAxwOkZg6o=
github.com/jcmturner/goidentity/v6 v6.0.1/go.mod h1:X1YW3bgtvwAXju7V3LCIMpY0Gbxyjn/mY9zx4tFonSg=
github.com/jcmturner/gokrb5/v8 v8.4.4 h1:x1Sv4HaTpepFkXbt2IkL29DXRf8sOfZXo8eRKh687T8=
github.com/jcmturner/gokrb5/v8 v8.4.4/go.mod h1:1btQEpgT6k+unzCwX1KdWMEwPPkkgBtP+F6aCACiMrs=
github.com/jcmturner/rpc/v2 v2.0.3 h1:7FXXj8Ti1IaVFpSAziCZWNzbNuZmnvw/i6CqLNdWfZY=
github.com/jcmturner/rpc/v2 v2.0.3/go.mod h1:VUJYCIDm3PVOEHw8sgt091/20OJjskO/YJki3ELg/Hc=
github.com/merlinz01/ldapserver v0.0.16 h1:n1PUidCbTp4Q0whEGdxadJeJS++9WZQWpKkHdx4YRq4=
github.com/merlinz01/ldapserver v0.0.16/go.mod h1:HdJaCmgx5Pz4aQzjDH4Byojdl5Ztm7BotwxDRAI/FY8=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
golang.org/x/crypto v0.36.0 h1:AnAEvhDddvBdpY+uR+MyHmuZzzNqXSe/GvuDeob5L34=
golang.org/x/crypto v0.36.0/go.mod h1:Y4J0ReaxCR1IMaabaSMugxJES1EpwhBHhv2bDHklZvc=
golang.org/x/net v0.38.0 h1:vRMAPTMaeGqVhG5QyLJHqNDwecKTomGeqbnfZyKlBI8=
golang.org/x/net v0.38.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
0707010000000E000041ED00000000000000000000000368C2895000000000000000000000000000000000000000000000001A00000000ldap-sebin-0.2.1/internal0707010000000F000041ED00000000000000000000000268C2895000000000000000000000000000000000000000000000002200000000ldap-sebin-0.2.1/internal/handler07070100000010000081A400000000000000000000000168C2895000000F55000000000000000000000000000000000000002D00000000ldap-sebin-0.2.1/internal/handler/handler.gopackage handler
// very shameful copy of beryju.io/ldap proxy example
import (
"crypto/sha1"
"fmt"
"log"
"strings"
"sync"
"github.com/go-ldap/ldap/v3"
"github.com/merlinz01/ldapserver"
)
type Handler struct {
ldapserver.BaseHandler
Verbose bool
AllowedBindDn string
Sessions map[string]Session
LdapUrl string
BaseDn string
FilterTemplate string
Mutex *sync.Mutex
}
type Session struct {
id string
ldap *ldap.Conn
}
func (h Handler) dial() (*ldap.Conn, error) {
if h.Verbose {
fmt.Printf("Starting connection to %s\n", h.LdapUrl)
}
return ldap.DialURL(h.LdapUrl)
}
func (h Handler) getSession(conn *ldapserver.Conn) (Session, error) {
id := connID(conn)
h.Mutex.Lock()
s, ok := h.Sessions[id] // use server connection if it exists
h.Mutex.Unlock()
if !ok { // open a new server connection if not
l, err := h.dial()
if err != nil {
if h.Verbose {
fmt.Printf("ERR: %s\n", err.Error())
}
return Session{}, err
}
// l.Debug = true
s = Session{id: id, ldap: l}
h.Mutex.Lock()
h.Sessions[s.id] = s
h.Mutex.Unlock()
}
return s, nil
}
func getFirstDNComponent(bindDN string) string {
searchFilter, _, _ := strings.Cut(bindDN, ",")
_, searchFilter, _ = strings.Cut(searchFilter, "=")
return searchFilter
}
func (h Handler) Bind(conn *ldapserver.Conn, msg *ldapserver.Message, req *ldapserver.BindRequest) {
result := ldapserver.ResultOperationsError.AsResult("Unknown Error")
defer func() {
if h.Verbose {
fmt.Printf("Bind result: %+v\n", result)
}
conn.SendResult(msg.MessageID, nil, ldapserver.TypeBindResponseOp, result)
}()
if !strings.HasSuffix(req.Name, h.AllowedBindDn) {
result = ldapserver.ResultInsufficientAccessRights.AsResult("hey! that's trespassing")
return
}
if req.Name == "" {
if h.Verbose {
log.Printf("Invalid bind with empty DN")
}
result = ldapserver.ResultInvalidCredentials.AsResult("Bind with empty DN is not allowed.")
return
}
searchFilter := strings.ReplaceAll(h.FilterTemplate, "$1", getFirstDNComponent(req.Name))
if h.Verbose {
log.Printf("input bind-dn: %+v\n", req.Name)
log.Printf("search-filter: %+v\n", searchFilter)
}
search := ldap.NewSearchRequest(
h.BaseDn,
ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 5, 0, false,
searchFilter,
[]string{"dn"},
nil,
)
s, err := h.getSession(conn)
if err != nil {
result = ldapserver.ResultOperationsError.AsResult("Upstream connection error")
return
}
if h.Verbose {
log.Printf("Performing search: %+v ", search)
}
sr, err := s.ldap.Search(search)
if err != nil {
result = ldapserver.ResultOperationsError.AsResult(fmt.Sprintf("error: %s", err))
return
}
if len(sr.Entries) == 0 {
result = ldapserver.ResultNoSuchObject.AsResult("Not found")
return
}
bindSimplePw := req.Credentials.(string)
for _, entry := range sr.Entries {
newDn := entry.DN
if h.Verbose {
log.Printf("Search matched DN: %+v ", newDn)
}
if err := s.ldap.Bind(newDn, bindSimplePw); err != nil {
if h.Verbose {
log.Printf("Failed auth with %s, continuing\n", newDn)
}
continue
}
if h.Verbose {
log.Printf("Auth succeeded with: %+v ", newDn)
}
result = ldapserver.ResultSuccess.AsResult("Success")
return
}
if h.Verbose {
log.Printf("Failed auth against all matched entries")
}
result = ldapserver.ResultInvalidCredentials.AsResult("Could not bind with the given password")
return
}
func (h Handler) Search(conn *ldapserver.Conn, msg *ldapserver.Message, req *ldapserver.SearchRequest) {
conn.SendResult(msg.MessageID, nil, ldapserver.TypeSearchResultDoneOp,
ldapserver.ResultSuccess.AsResult("This is a no-op, no search was actually done."))
}
func connID(conn *ldapserver.Conn) string {
h := sha1.New()
h.Write([]byte(conn.LocalAddr().String() + conn.RemoteAddr().String()))
sha := fmt.Sprintf("% x", h.Sum(nil))
return string(sha)
}
07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!73 blocks
