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SLAPPASSWD(8C)                                                                                SLAPPASSWD(8C)



NAME
       slappasswd - OpenLDAP password utility

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


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  direc-tive. directive.
       tive.

OPTIONS
       -v     enable verbose mode.

       -u     Generate RFC 2307 userPassword values (the default).  Future versions of this program may gen-erate generate
              erate 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.

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 eavesdrop-ping eavesdropping
       ping 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 University of Michigan LDAP 3.3 Release.



OpenLDAP 2.4.28                                  2011/11/24                                   SLAPPASSWD(8C)