bool silc_cipher_alloc(const unsigned char *name,
                           SilcCipher *new_cipher);

    Allocates a new SILC cipher object. Function returns 1 on succes and 0 
    on error. The allocated cipher is returned in new_cipher argument. The
    caller must set the key to the cipher after this function has returned
    by calling the ciphers set_key function.