DES_cfb64_encrypt
LCRYPTO_ALIAS(DES_cfb64_encrypt);
void DES_cfb64_encrypt(const unsigned char *in, unsigned char *out, long length,
DES_cfb64_encrypt(in, out, (long)chunk, ctx->cipher_data,
DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
LCRYPTO_USED(DES_cfb64_encrypt);
DES_cfb64_encrypt(plain,cfb_buf1,12,&ks,&cfb_tmp,&n,DES_ENCRYPT);
DES_cfb64_encrypt(&(plain[12]),&(cfb_buf1[12]),sizeof(plain)-12,&ks,
DES_cfb64_encrypt(cfb_buf1,cfb_buf2,17,&ks,&cfb_tmp,&n,DES_DECRYPT);
DES_cfb64_encrypt(&(cfb_buf1[17]),&(cfb_buf2[17]),