AUDIT_ENCODE_NV_STRING(3)					  Linux Audit API					 AUDIT_ENCODE_NV_STRING(3)

NAME

       audit_encode_nv_string - encode a name/value pair in a string

SYNOPSIS

       #include <libaudit.h>

       char *audit_encode_nv_string(const char *name, const char *value, unsigned int vlen)

DESCRIPTION

       This  function is used to encode a name/value pair. This should be used on any field being logged that potentially contains a space, a dou-
       ble-quote, or a control character. Any value containing those have to be specially encoded for the auparse library to correctly handle  the
       value. The encoding method is designed to prevent log injection attacks where malicious values could cause parsing errors.

       To  use	this  function,  pass  the name string and value strings on their respective arguments. If the value is likely to have a NUL value
       embedded within it, you will need to pass a value length that tells in bytes how big the value is. Otherwise, you can pass a 0 for vlen and
       the  function  will  simply use strlen against the value pointer. Also be aware that the name of the field will cause auparse to do certain
       things when interpretting the value. If the name is uid, a user id value in decimal is expected. Make sure that well known names  are  used
       for their intended purpose or that there is no chance of name collision with something new.

RETURN VALUE

       Returns a freshly malloc'ed string that the caller must free or NULL on error.

SEE ALSO

       audit_log_user_message(3), audit_log_user_comm_message(3), audit_log_user_avc_message(3), audit_log_semanage_message(3).

AUTHOR

       Steve Grubb

Red Hat 							     Oct 2010						 AUDIT_ENCODE_NV_STRING(3)