illumos: manual page: crypt.conf.5

CRYPT.CONF(5) File Formats and Configurations CRYPT.CONF(5)

NAME

crypt.conf - configuration file for pluggable crypt modules

SYNOPSIS

/etc/security/crypt.conf

DESCRIPTION

crypt.conf is the configuration file for the pluggable crypt
architecture. Each crypt module must provide a function to generate a
password hash, crypt_genhash_impl(3C), and a function to generate the
salt, crypt_gensalt_impl(3C).

There must be at least one entry in crypt.conf with the same name as is
stored in the crypt_algorithm_magic symbol of the module. The
documentation provided with the module should list this name.

The module_path field specifies the path name to a shared library object
that implements crypt_genhash_impl(), crypt_gensalt_impl(), and
crypt_algorithm_magic. If the path name is not absolute, it is assumed
to be relative to /usr/lib/security/$ISA. If the path name contains the
$ISA token, the token is replaced by an implementation-defined directory
name that defines the path relative to the calling program's instruction
set architecture.

The params field is used to pass module-specific options to the shared
objects. See crypt_genhash_impl(3C) and crypt_gensalt_impl(3C). It is
the responsibility of the module to parse and interpret the options. The
params field can be used by the modules to turn on debugging or to pass
any module-specific parameters that control the output of the hashing
algorithm.

EXAMPLES

Example 1: Provide compatibility for md5crypt-generated passwords.

The default configuration preserves previous Solaris behavior while
adding compatibility for md5crypt-generated passwords as provided on some
BSD and Linux systems.

#
# crypt.conf
#
1 /usr/lib/security/$ISA/crypt_bsdmd5.so

Example 2: Use md5crypt to demonstrate compatibility with BSD- and Linux-

based systems.

The following example lists 4 algorithms and demonstrates how
compatibility with BSD- and Linux-based systems using md5crypt is made
available, using the algorithm names 1 and 2.

#
# crypt.conf
#
md5 /usr/lib/security/$ISA/crypt_md5.so
rot13 /usr/lib/security/$ISA/crypt_rot13.so

# For *BSD/Linux compatibility
# 1 is md5, 2 is Blowfish
1 /usr/lib/security/$ISA/crypt_bsdmd5.so
2 /usr/lib/security/$ISA/crypt_bsdbf.so

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