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       lprng_certs - lprng SSL certificate management


       lprng_certs option
         init     - make directory structure
         newca    - make new root CA
         defaults - set new default values for certs
         gen      - generate user, server, or signing cert
         index [dir] - index cert files
         verify [cert] - verify cert file
         encrypt keyfile
                  - set or change keyfile password


       The  lprng_certs  program  is  used  to manage SSL certificates for the
       LPRng  software.   There  SSL  certificate  structure  consists  of   a
       hierarchy  of  certificates.   The  LPRng  software  assumes  that  the
       following types of certificates will be used:

       CA or root
              A top level or self-signed certificate.

              A certificate that can be used to sign other certificates.  This
              is signed by the root CA or another signing certificate.

       user   A  certificate  used by a user to identify themselves to the lpd

       server A certificate used by the lpd server to identify  themselves  to
              the user or other lpd servers.

Signing Certificates

       All  of  the signing certificates, including the root certificate (root
       CA), //etc/lprng/, are in the same directory as  the  root
       CA file.  Alternately, all of the signing certs can be concatenated and
       put into a single file, which by convention is assumed to have the same
       name  as the root CA file, //etc/lprng/  The ssl_ca_file,
       ssl_ca_path, and ssl_ca_key printcap and configuration options  can  be
       used  to  specify  the  locations  of  the  root  CA files, a directory
       containing the signing certificate files, and the private key file  for
       the root CA file respectively.

       The  root  certificate  (root  CA file) //etc/lprng/ has a
       private key file //etc/lprng/ as well.  By convention, the
       private  keys for the other signing certificate files are stored in the
       certificate file.

       The OpenSSL software requires that this directory also contain a set of
       hash files which are, in effect, links to these files.

       By  default,  all  signing  certificates  are assumed to be in the same
       directory as the root certificate.

Server Certificates

       The certificate used by the lpd server are kept in  another  directory.
       These files do not need to have hash links to them.  By convention, the
       private keys for these certificate files are stored in the  certificate
       file.   The server certificate file is specified by the ssl_server_cert
       and has the default value //etc/lprng/ssl.server/server.crt.  This file
       contains  the  cert  and  private key.  The server certificate password
       file is specified by the ssl_server_password option  with  the  default

       and  contains  the password used to decrypt the servers private key and
       use it for authentication.  This key file should be read  only  by  the
       lpd server.

User Certificates

       The  certificates used by users are kept in a separate directory in the
       users home directory.   By  convention,  the  private  keys  for  these
       certificate files are stored in the certificate file.

       The  user certificate file is specified by the LPR_SSL_FILE environment
       variable, otherwise the ${HOME}/.lpr/client.crt is used.  The  password
       is  taken  from  the file specified by the LPR_SSL_PASSWORD environment
       variable, otherwise the ${HOME}/.lpr/client.pwd file is read.


       The organization of the SSL certificates used by LPRng  is  similar  to
       that  used  by  other programs such as the Apache mod_ssl support.  The
       lprng_certs program is used to create the directory  structure,  create
       certificates  for  the root CA, signing, user and servers.  In order to
       make management simple, the following support is provided.

lprng_certs init

       This command creates the directories used by the  lpd  server.   It  is
       useful when setting up a new lpd server.

lprng_certs newca

       This  command  creates a self-signed certificate, suitable for use as a
       root CA certificate.  It also sets up a set of default values for other
       certificate creation.

lprng_certs defaults

       This command is used to modify the set of default values.

       The  default  values  are listed and should be self-explanatory, except
       for the value of the signer certificate.  By default, the root  CA  can
       be  used  to  sign certificates.  However, a signing certificate can be
       used as well.  This allows  delegation  of  signing  authority  without
       compromising the security of the root CA.

lprng_certs gen

       This is used to generate a user, server, or signing certificate.

lprng_certs index

       This is used to create the indexes for the signing certificates.

lprng_certs verify [cert]

       This  checks  the  certificate  file  using  the Openssl openssl verify

lprng_certs encrypt keyfile

       This removes all key information from the key file, reencrypts the  key
       information, and the puts the encrypted key information in the file.


       Option                   Purpose
       ssl_ca_path              directory holding the SSL signing certs
       ssl_ca_file              file holding the root CA or all SSL signing certs
       ssl_server_cert          cert file for the server
       ssl_server_password      file containing password for server server
       ${HOME}/.lpr/client.crt  client certificate file
       ${HOME}/.lpr/client.pwd  client certificate private key password


       LPR_SSL_FILE             client certificate file
       LPR_SSL_PASSWORD         client certificate private key password


       The following exit values are returned:

       zero (0)       Successful completion.

       non-zero (!=0) An error occurred.


       lpd.conf(5),  lpc(8),  lpd(8),  checkpc(8),  lpr(1),  lpq(1),  lprm(1),
       printcap(5), lpd.conf(5), pr(1), lprng_certs(1),  lprng_index_certs(1).


       Patrick Powell <>.


       LPRng  is  a enhanced printer spooler system with functionality similar
       to the Berkeley LPR software.  The  LPRng  developer  mailing  list  is;      subscribe      by      visiting   or   sending
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       The software is available via