BF_cfb64_encrypt
LCRYPTO_ALIAS(BF_cfb64_encrypt);
void BF_cfb64_encrypt(const unsigned char *in, unsigned char *out, long length,
BF_cfb64_encrypt(in, out, (long)chunk, &((EVP_BF_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num, ctx->encrypt);
LCRYPTO_USED(BF_cfb64_encrypt);
BF_cfb64_encrypt(bt->in, out, bt->in_len * 8, &key, iv, &remainder, 1);
BF_cfb64_encrypt(bt->out, out, bt->out_len, &key, iv, &remainder, 0);