slapo-autoca(5) — Linux manual page


SLAPO-AUTOCA(5)              File Formats Manual             SLAPO-AUTOCA(5)

NAME         top

       slapo-autoca - Automatic Certificate Authority overlay to slapd

SYNOPSIS         top


DESCRIPTION         top

       The Automatic CA overlay generates X.509 certificate/key pairs for
       entries in the directory. The DN of a generated certificate is
       identical to the DN of the entry containing it. On startup it looks
       for a CA certificate and key in the suffix entry of the database
       which it will use to sign all subsequently generated certificates. A
       new CA certificate and key will be generated and stored in the suffix
       entry if none already exists. The CA certificate is stored in the
       cACertificate;binary attribute of the suffix entry, and the private
       key is stored in the cAPrivateKey;binary attribute of the suffix
       entry. These attributes may be overwritten if some other CA
       certificate/key pair is desired for use.

       Certificates for users and servers are generated on demand using a
       Search request returning only the userCertificate;binary and
       userPrivateKey;binary attributes. Any Search for anything besides
       exactly these two attributes is ignored by the overlay. Note that
       these values are stored in ASN.1 DER form in the directory so the
       ";binary" attribute option is mandatory.

       Entries that do not belong to selected objectClasses will be ignored
       by the overlay. By default, entries of objectClass person will be
       treated as users, and entries of objectClass ipHost will be treated
       as servers. There are slight differences in the set of X.509V3
       certificate extensions added to the certificate between users and

       The CA's private key is stored in a cAPrivateKey attribute, and user
       and server private keys are stored in the userPrivateKey attribute.
       The private key values are encoded in PKCS#8 format.  It is essential
       that access to these attributes be properly secured with ACLs. Both
       of these attributes inherit from the pKCS8PrivateKey attribute, so it
       is sufficient to use a single ACL rule like

               access to attrs=pKCS8PrivateKey by self ssf=128 write

       at the beginning of the rules.

       Currently there is no automated management for expiration or
       revocation.  Obsolete certificates and keys must be manually removed
       by deleting an entry's userCertificate and userPrivateKey attributes.


       These slapd.conf options apply to the Automatic CA overlay.  They
       should appear after the overlay directive.

       userClass <objectClass>
              Specify the objectClass to be treated as user entries.

       serverClass <objectClass>
              Specify the objectClass to be treated as server entries.

       userKeybits <integer>
              Specify the size of the private key to use for user
              certificates.  The default is 2048 and the minimum is 512.

       serverKeybits <integer>
              Specify the size of the private key to use for server
              certificates.  The default is 2048 and the minimum is 512.

       caKeybits <integer>
              Specify the size of the private key to use for the CA
              certificate.  The default is 2048 and the minimum is 512.

       userDays <integer>
              Specify the duration for a user certificate's validity.  The
              default is 365, 1 year.

       serverDays <integer>
              Specify the duration for a server certificate's validity.  The
              default is 1826, 5 years.

       caDays <integer>
              Specify the duration for the CA certificate's validity.  The
              default is 3652, 10 years.

       localDN <DN>
              Specify the DN of an entry that represents this server.
              Requests to generate a certificate/key pair for this DN will
              also install the certificate and key into slapd's TLS settings
              in cn=config for immediate use.

EXAMPLES         top

         database mdb
         overlay autoca
         caKeybits 4096

FILES         top

              default slapd configuration file

SEE ALSO         top

       slapd.conf(5), slapd-config(5).

AUTHOR         top

       Howard Chu

COLOPHON         top

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