hash_buf          109 http/modules/ngx_http_secure_link_module.c     u_char                        hash_buf[16], md5_buf[16];
hash_buf          157 http/modules/ngx_http_secure_link_module.c     hash.data = hash_buf;
hash_buf          178 http/modules/ngx_http_secure_link_module.c     if (ngx_memcmp(hash_buf, md5_buf, 16) != 0) {