LPRNG_CERTS(1)LPRNG_CERTS(1)NAMElprng_certs - lprng SSL certificate management
SYNOPSISlprng_certs option
Options:
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
DESCRIPTION
The lprng_certs program is used to manage SSL certificates for the
LPRng software. There SSL certificate structure consists of a hierar‐
chy 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.
signing
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.
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/lpd/ssl.ca/ca.crt, 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/lpd/ssl.ca/ca.crt. 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 con‐
taining the signing certificate files, and the private key file for the
root CA file respectively.
The root certificate (root CA file) /etc/lpd/ssl.ca/ca.crt has a pri‐
vate key file /etc/lpd/ssl.ca/ca.key as well. By convention, the pri‐
vate 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/lpd/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
value @SSL_SERVER_PASSWORD@ 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 cer‐
tificate 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.
USING LPRNG_CERTS
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 managment 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 com‐
promising 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 com‐
mand.
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.
LPRng OPTIONS
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
ENVIRONMENT VARIABLES
LPR_SSL_FILE client certificate file
LPR_SSL_PASSWORD client certificate private key password
EXIT STATUS
The following exit values are returned:
zero (0) Successful completion.
non-zero (!=0) An error occurred.
SEE ALSOlpd.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).
HISTORY
LPRng is a enhanced printer spooler system with functionality similar
to the Berkeley LPR software. The LPRng mailing list is
lprng@lprng.com; subscribe by sending mail to lprng-request@lprng.com
with the word subscribe in the body. The software is available from
ftp://ftp.lprng.com/pub/LPRng.
AUTHOR
Patrick Powell <papowell@lprng.com>.
LPRng LPRng-3.9.0 LPRNG_CERTS(1)
