Library Description
/lib/libc.so.6 C Run time library functions.
/lib/libcrypt.so.1 Library that performs one-way encryption of user and group
passwords.
/lib/libcrypt.so.o.9.8b Replacement library for libcrypt.so.1 Supports bigcrypt and
blowfish password encryption.
/lib/security/pam_unix.so Modules that perform basic password-based authentication,
configured with the MD5 hashing algorithm.
/lib/security/pam_passwdqc
.so
Modules that enforce additional stricter password rules. For
example, reject passwords that follow keyboard patterns such as
“1az2pqr”.
/lib/security/pam_wheel.soModules that restrict use of the su command to members of the
wheel group.
/lib/security/pam_nologin.
so
Modules that allow the administrator to disable all logins with the
/etc/nologin file.
/lib/security/pam_securett
y.so
Modules that restrict root access to specific terminals.
/lib/security/pam_tally.soModules that deny access based on the number of failed login
attempts.
/lib/security/pam_listfile
.so
Modules that allow use of ACLs based on users, ttys, remote hosts,
groups, and shells.
/lib/security/pam_deny.so Module that always returns a failure.
/lib/security/pam_env.so Module that loads a configurable list of environment variables.
/lib/security/pam_xauth.soModule that forwards xauth cookies from user to user.
/lib/security/pam_limits.s
o
Module that imposes user limits on login.
/lib/security/pam_shells.s
o
Module that grants authentication if the users shell is listed in
/etc/shells
/lib/security/pam_stack.soModule that performs normal password authentication through
recursive stacking of modules.
/lib/security/pam_rootok.s
o
An authentication module that performs one task: if the id of the
user is '0' then it returns 'PAM_SUCCESS'
/usr/lib/libssl3.so OpenSSL library with interfaces to Secure Socket Layer version 3
and Transport Layer Security version 1 protocols.
/lib/libcrypto.so.4 OpenSSL crypto library with interfaces to wide range of
cryptographic algorithms used in various Internet standards.
Table 5-7: TSF libraries
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