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
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