gui: Output "xxx tag not set" for unset tags rather than empty strings.

[paraslash.git] / crypt.h

diff --git a/crypt.h b/crypt.h
index 88af9e89c10e6cfe468e7c6787bfdde32bbb536c..8edff4130a1386689108400af496a980b94e2fa7 100644 (file)
--- a/crypt.h
+++ b/crypt.h
@@ -7,10 +7,6 @@
 /** \file crypt.h prototypes for the RSA crypt functions */
 
 #include <openssl/pem.h>
-int para_decrypt_challenge(char *key_file, long unsigned *challenge_nr,
-       unsigned char *buf, unsigned rsa_inlen);
-int para_encrypt_challenge(RSA* rsa, long unsigned challenge_nr,
-       unsigned char *outbuf);
 int para_encrypt_buffer(RSA* rsa, unsigned char *inbuf, unsigned len,
        unsigned char *outbuf);
 int para_decrypt_buffer(char *key_file, unsigned char *outbuf, unsigned char *inbuf,
@@ -18,8 +14,32 @@ int para_decrypt_buffer(char *key_file, unsigned char *outbuf, unsigned char *in
 int get_rsa_key(char *key_file, RSA **rsa, int private);
 
 void rsa_free(RSA *rsa);
+void get_random_bytes_or_die(unsigned char *buf, int num);
+void init_random_seed_or_die(void);
+
+/**
+ * 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.
+ */
+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;
+};
+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, ...);
+int rc4_recv_bin_buffer(struct rc4_context *rcc, char *buf, size_t size);
+int rc4_recv_buffer(struct rc4_context *rcc, char *buf, size_t size);
 
 /** \cond used to distinguish between loading of private/public key */
 #define LOAD_PUBLIC_KEY 0
 #define LOAD_PRIVATE_KEY 1
+#define CHALLENGE_SIZE 64
 /** \endcond **/