CRYPTO: Use unprefixed version of function stpncpy glibc contains two versions of finction stpncpy sh-4.2$ nm --dynamic --defined-only /lib64/libc.so.6 | grep stpncpy 0000003ce1c89b00 i stpncpy 0000003ce1c89b00 i __stpncpy 0000003ce1d040a0 T __stpncpy_chk We should use more portable version of stpncpy without prefix with underscores. The function __stpncpy was used in initial veersion e65c65fc710fa030bfb8319efc43fcdc9ce5a26f, which was based on http://people.redhat.com/drepper/SHA-crypt.txt Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

UTIL: Create new wraper header file sss_endian.h Some platform have header file endian.h and anothers have sys/endian.h. We nedd to use conditional build to handle it correctly, therefore new header file sss_endian.h was created.

Set _GNU_SOURCE globally

Move crypto functions into its own subdir A refactoring patch that creates a common util/crypto subdir with per-implementation subdirectories for each underlying crypto library supported by SSSD.