MAXBITCHUNK
while (len >= MAXBITCHUNK) {
CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks,
len -= MAXBITCHUNK;
out += MAXBITCHUNK;
in += MAXBITCHUNK;
while (len >= MAXBITCHUNK) {
CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks,
len -= MAXBITCHUNK;
out += MAXBITCHUNK;
in += MAXBITCHUNK;
while (len >= MAXBITCHUNK) {
CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, dat->ks,
len -= MAXBITCHUNK;
out += MAXBITCHUNK;
in += MAXBITCHUNK;