X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=crypt.h;h=8edff4130a1386689108400af496a980b94e2fa7;hp=c430406f3c269b7d23e0d05fd95a8fe01bfe2f8a;hb=35fb7de0ca7f871a6832d1041321d52af66fdf7b;hpb=a9126f461792a84c760162ecb25100f1593d427d

diff --git a/crypt.h b/crypt.h
index c430406f..8edff413 100644
--- 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,
@@ -21,9 +17,19 @@ 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);
@@ -35,4 +41,5 @@ 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 **/