static void desx_cbc_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
unsigned char *iv,int enc);
static void desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
unsigned char *in, unsigned int inl);
static void desx_cbc_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
unsigned char *iv,int enc);
static void desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
unsigned char *in, unsigned int inl);