NAME

       slappasswd - OpenLDAP password utility

SYNOPSIS

       /usr/sbin/slappasswd  [-v]  [-u]  [-g|-s secret|-T file]  [-h hash]  [-c salt-format] [-n]
       [-o option[=value]]

DESCRIPTION

       Slappasswd is used to generate an userPassword value suitable for use with  ldapmodify(1),
       slapd.conf(5)   rootpw   configuration   directive   or   the   slapd-config(5)  olcRootPW
       configuration directive.

OPTIONS

       -v     enable verbose mode.

       -u     Generate RFC 2307 userPassword values  (the  default).   Future  versions  of  this
              program  may generate alternative syntaxes by default.  This option is provided for
              forward compatibility.

       -s secret
              The secret to hash.  If this, -g and -T are absent, the user will be  prompted  for
              the secret to hash.  -s, -g and -T are mutually exclusive flags.

       -g     Generate  the secret.  If this, -s and -T are absent, the user will be prompted for
              the secret to hash.  -s, -g and -T  are  mutually  exclusive  flags.   If  this  is
              present, {CLEARTEXT} is used as scheme.  -g and -h are mutually exclusive flags.

       -T "file"
              Hash  the  contents  of  the file.  If this, -g and -s are absent, the user will be
              prompted for the secret to hash.  -s, -g and -T and mutually exclusive flags.

       -h "scheme"
              If -h is specified, one of  the  following  RFC  2307  schemes  may  be  specified:
              {CRYPT}, {MD5}, {SMD5}, {SSHA}, and {SHA}.  The default is {SSHA}.

              Note  that scheme names may need to be protected, due to { and }, from expansion by
              the user's command interpreter.

              {SHA} and {SSHA} use the SHA-1 algorithm (FIPS 160-1), the latter with a seed.

              {MD5} and {SMD5} use the MD5 algorithm (RFC 1321), the latter with a seed.

              {CRYPT} uses the crypt(3).

              {CLEARTEXT} indicates that the new password should  be  added  to  userPassword  as
              clear text.  Unless {CLEARTEXT} is used, this flag is incompatible with option -g.

       -c crypt-salt-format
              Specify  the  format  of  the  salt  passed  to  crypt(3)  when  generating {CRYPT}
              passwords.  This string needs to be in sprintf(3) format and may include  one  (and
              only  one)  %s  conversion.   This  conversion will be substituted with a string of
              random characters from [A-Za-z0-9./].  For example, '%.2s' provides a two character
              salt  and  '$1$%.8s'  tells  some  versions of crypt(3) to use an MD5 algorithm and
              provides 8 random characters of salt.  The  default  is  '%s',  which  provides  31
              characters of salt.

       -n     Omit the trailing newline; useful to pipe the credentials into a command.

       -o option[=value]
              Specify an option with a(n optional) value.  Possible generic options/values are:

                     module-path=<pathspec> (see `modulepath' in slapd.conf(5))
                     module-load=<filename> (see `moduleload' in slapd.conf(5))

              You can load a dynamically loadable password hash module by
              using this option.

LIMITATIONS

       The  practice  of  storing  hashed  passwords in userPassword violates Standard Track (RFC
       4519) schema specifications and  may  hinder  interoperability.   A  new  attribute  type,
       authPassword,  to  hold  hashed  passwords  has  been  defined  (RFC 3112), but is not yet
       implemented in slapd(8).

       It should also be noted that the behavior of crypt(3) is platform specific.

SECURITY CONSIDERATIONS

       Use of hashed passwords does not protect passwords during protocol transfer.  TLS or other
       eavesdropping protections should be in-place before using LDAP simple bind.

       The hashed password values should be protected as if they were clear text passwords.

SEE ALSO

       ldappasswd(1),  ldapmodify(1),  slapd(8),  slapd.conf(5),  slapd-config(5),  RFC 2307, RFC
       4519, RFC 3112

       "OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)

ACKNOWLEDGEMENTS

       OpenLDAP   Software   is   developed   and   maintained   by    The    OpenLDAP    Project
       <http://www.openldap.org/>.   OpenLDAP Software is derived from the University of Michigan
       LDAP 3.3 Release.