sha256/md5: state-based hash: handle size_t overflow.

* chksum.c (sha256_szmax_upd, md5_szmax_upd): New static
functions, consisting of logic from sha256_buf and
md5_buf, respectively.
(sha256_buf, md5_buf): Use sha256_szmax_up and md5_szmax_upd,
respectively, to handle the unlikely possiblity of the ucnum
buffer length being larger than the range of size_t.
(sha256_hash, md5_hash): Also use the new static functions
instead of callig SHA256_update or MD5_update directly
to deal with the same issue.

0 files changed, 0 insertions, 0 deletions