BF_cfb64_encrypt
OSSL_DEPRECATEDIN_3_0 void BF_cfb64_encrypt(const unsigned char *in,
BF_cfb64_encrypt((unsigned char *)cbc_data, cbc_out, (long)13,
BF_cfb64_encrypt((unsigned char *)&(cbc_data[13]), &(cbc_out[13]),
BF_cfb64_encrypt(cbc_out, cbc_in, 17, &key, iv, &n, BF_DECRYPT);
BF_cfb64_encrypt(&(cbc_out[17]), &(cbc_in[17]), len - 17,