138 lines
3.1 KiB
Go
138 lines
3.1 KiB
Go
package main
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import (
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"crypto/rand"
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"crypto/tls"
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"encoding/base64"
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"errors"
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"fmt"
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"github.com/amoghe/go-crypt"
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"github.com/go-ldap/ldap/v3"
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)
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type LDAP struct {
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Host string
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Port int
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Starttls bool
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Ssl bool
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BaseDN string
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ServiceDN string
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ServicePassword string
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MailHost string
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MailPort int
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MailUser string
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MailPassword string
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}
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func (l LDAP) Connect() (*LDAPConn, error) {
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if l.Ssl {
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if c, err := ldap.DialTLS("tcp", fmt.Sprintf("%s:%d", l.Host, l.Port), &tls.Config{ServerName: l.Host}); err != nil {
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return nil, errors.New("unable to establish LDAPS connection to " + fmt.Sprintf("%s:%d", l.Host, l.Port) + ": " + err.Error())
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} else {
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return &LDAPConn{
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LDAP: l,
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connection: c,
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}, nil
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}
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} else if c, err := ldap.Dial("tcp", fmt.Sprintf("%s:%d", l.Host, l.Port)); err != nil {
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return nil, errors.New("unable to establish LDAP connection to " + fmt.Sprintf("%s:%d", l.Host, l.Port) + ": " + err.Error())
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} else {
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if l.Starttls {
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if err = c.StartTLS(&tls.Config{ServerName: l.Host}); err != nil {
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c.Close()
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return nil, errors.New("unable to StartTLS: " + err.Error())
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}
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}
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return &LDAPConn{
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LDAP: l,
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connection: c,
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}, nil
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}
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}
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type LDAPConn struct {
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LDAP
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connection *ldap.Conn
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}
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func (l LDAPConn) ServiceBind() error {
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return l.connection.Bind(l.ServiceDN, l.ServicePassword)
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}
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func (l LDAPConn) Bind(username string, password string) error {
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return l.connection.Bind(username, password)
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}
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func (l LDAPConn) SearchDN(username string, person bool) (string, error) {
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objectClass := "organizationalPerson"
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if !person {
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objectClass = "simpleSecurityObject"
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}
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searchRequest := ldap.NewSearchRequest(
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l.BaseDN,
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ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false,
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fmt.Sprintf("(&(objectClass=%s)(uid=%s))", objectClass, username),
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[]string{"dn"},
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nil,
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)
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sr, err := l.connection.Search(searchRequest)
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if err != nil {
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return "", err
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}
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if len(sr.Entries) != 1 {
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return "", errors.New("User does not exist or too many entries returned")
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}
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return sr.Entries[0].DN, nil
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}
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func (l LDAPConn) GetEntry(dn string) ([]*ldap.EntryAttribute, error) {
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searchRequest := ldap.NewSearchRequest(
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dn,
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ldap.ScopeBaseObject, ldap.NeverDerefAliases, 0, 0, false,
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"(objectClass=*)", []string{}, nil,
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)
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sr, err := l.connection.Search(searchRequest)
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if err != nil {
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return nil, err
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}
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if len(sr.Entries) != 1 {
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return nil, errors.New("User does not exist or too many entries returned")
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}
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return sr.Entries[0].Attributes, nil
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}
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func genSalt() (string, error) {
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b := make([]byte, 16)
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if _, err := rand.Read(b); err != nil {
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return "", err
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}
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return base64.StdEncoding.EncodeToString(b), nil
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}
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func (l LDAPConn) ChangePassword(dn string, rawpassword string) error {
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salt, err := genSalt()
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if err != nil {
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return err
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}
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hashedpasswd, err := crypt.Crypt(rawpassword, "$6$"+salt+"$")
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if err != nil {
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return err
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}
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modify := ldap.NewModifyRequest(dn, nil)
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modify.Replace("userPassword", []string{"{CRYPT}" + hashedpasswd})
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return l.connection.Modify(modify)
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}
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