crypt_preferred_method

CRYPT_PREFERRED_METHO... BSD Library Functions Manual CRYPT_PREFERRED_METHO...

NAME
     crypt_preferred_method -- get the prefix of the preferred hash method

LIBRARY
     Crypt Library (libcrypt, -lcrypt)

SYNOPSIS
     #include <crypt.h>

     const char*
     crypt_preferred_method(void);

DESCRIPTION
     crypt_preferred_method is a convenience function to get the prefix of the
     preferred hash method.  If a preferred method is available, it is the
     same as the one also used by the crypt_gensalt functions, if their given
     prefix parameter is NULL.

RETURN VALUES
     The string returned equals the prefix of the preferred hash method.  If
     no preferred hash method is available it is NULL.  It is safe to pass the
     string returned by crypt_preferred_method directly to crypt_gensalt with-
     out prior string-sanitizing nor NULL-pointer checks.

FEATURE TEST MACROS
     <crypt.h> will define the macro CRYPT_PREFERRED_METHOD_AVAILABLE if
     crypt_preferred_method is available in the current version of libxcrypt.

PORTABILITY NOTES
     The function crypt_preferred_method is not part of any standard.  It was
     added to libxcrypt in version 4.4.0.

ATTRIBUTES
     For an explanation of the terms used in this section, see attributes(7).
     +-----------------------+---------------+---------+
     |Interface              | Attribute     | Value   |
     +-----------------------+---------------+---------+
     |crypt_preferred_method | Thread safety | MT-Safe |
     +-----------------------+---------------+---------+

SEE ALSO
     crypt_gensalt(3)

libxcrypt                      November 16, 2018                     libxcrypt