void get_random_bytes_or_die(unsigned char *buf, int num);
void init_random_seed_or_die(void);
+struct stream_cipher;
+
/**
* Used on the server-side for client-server communication encryption.
*
- * The traffic between (the forked child of) para_server and the remote
- * client process is crypted by a RC4 session key. This structure contains
- * the RC4 keys and the file descriptor for which these keys should be used.
+ * The traffic between (the forked child of) para_server and the remote client
+ * process is crypted by a symmetric session key. This structure contains the
+ * keys for the stream cipher and the file descriptor for which these keys
+ * should be used.
*/
struct rc4_context {
/** The socket file descriptor. */
int fd;
- /** Key used for sending data. */
- RC4_KEY recv_key;
/** Key used for receiving data. */
- RC4_KEY send_key;
+ struct stream_cipher *recv;
+ /** Key used for sending data. */
+ struct stream_cipher *send;
};
+
+struct stream_cipher *stream_cipher_new(const unsigned char *data, int len);
+void stream_cipher_free(struct stream_cipher *sc);
+
int rc4_send_bin_buffer(struct rc4_context *rc4c, const char *buf, size_t len);
int rc4_send_buffer(struct rc4_context *rc4c, const char *buf);
__printf_2_3 int rc4_send_va_buffer(struct rc4_context *rc4c, const char *fmt, ...);