compilation issue on strcpy and DES deprecated

[pox822]

2 issues :
In file included from /usr/include/string.h:535,
from mfterm.c:26:
In function ‘strncpy’,
inlined from ‘completion_sub_cmd_generator’ at mfterm.c:263:5:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:95:10: error: ‘__builtin_strncpy’ specified bound 128 equals destination size [-Werror=stringop-truncatio
]
95 | return __builtin___strncpy_chk (__dest, __src, __len,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
96 | __glibc_objsize (__dest));

and

mac.c:50:3: error: ‘DES_set_key_unchecked’ is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
50 | DES_set_key_unchecked(&des_key, &schedule);
| ^~~~~~~~~~~~~~~~~~~~~
In file included from mac.c:20:
/usr/include/openssl/des.h:192:6: note: declared here
192 | void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule);
| ^~~~~~~~~~~~~~~~~~~~~
mac.c:59:3: error: ‘DES_ncbc_encrypt’ is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
59 | DES_ncbc_encrypt(padded_input, output, length, &schedule, &ivec, 1);
| ^~~~~~~~~~~~~~~~
In file included from mac.c:20:
/usr/include/openssl/des.h:93:6: note: declared here
93 | void DES_ncbc_encrypt(const unsigned char *input, unsigned char *output,
| ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors