SHA256_File
char *SHA256_File(const char *, char *);
SHA256_Filter, (_filefunc) SHA256_File },
dres = SHA256_File(from_name, NULL);
if ((digestbuf = SHA256_File(p->fts_accpath, NULL)) == NULL) {
dosum(fp, indent, p, &offset, F_SHA256, SHA256_File, SHA256KEY);
{ "SHA256", SHA256_File },