project: Introduce actual connections

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/ostp.d/net/otd_auth.c b/ostp.d/net/otd_auth.c
index 3511e0c..6e757ae 100644
--- a/ostp.d/net/otd_auth.c
+++ b/ostp.d/net/otd_auth.c
@@ -27,9 +27,12 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <arpa/inet.h>
 #include <net/auth.h>
+#include <net/param.h>
 #include <net/stpsession.h>
 #include <crypto/ecdh.h>
+#include <otconfig.h>
 #include <stdio.h>
 
 #define KEY_BYTE_WIDTH 32
@@ -47,6 +50,17 @@ log_pubkey(uint8_t pubkey[KEY_BYTE_WIDTH])
     printf("\n");
 }
 
+static void
+send_motd(int client_fd, const unsigned char *session_key)
+{
+    char motd[] = MOTD;
+
+    printf("Sending MOTD...\n");
+    if (send_frame(client_fd, motd, sizeof(motd), session_key) < 0) {
+        printf("Failed to session MOTD\n");
+    }
+}
+
 /*
  * Verify the session request packet and handle
  * the rest.
@@ -58,6 +72,8 @@ int
 handle_srq(int client_fd, struct session_request *srq)
 {
     struct x25519_keypair keypair;
+    unsigned char *session_key;
+    int error;
 
     printf("Got public key from peer: \n");
     log_pubkey(srq->pubkey);
@@ -68,5 +84,26 @@ handle_srq(int client_fd, struct session_request *srq)
         return -1;
     }
 
+    /* Send back our our public key */
+    error = send(client_fd, keypair.pubkey, keypair.pubkey_len, 0);
+    if (error < 0) {
+        perror("Failed to send public key");
+        return error;
+    }
+
+    printf("Deriving session key...\n");
+    error = gen_session_key(keypair.privkey, srq->pubkey, &session_key);
+    if (error < 0) {
+        return error;
+    }
+
+    /* Handle any requested session parameters */
+    if ((error = negotiate_spw(client_fd, session_key)) < 0) {
+        free_session_key(session_key);
+        return error;
+    }
+
+    send_motd(client_fd, session_key);
+    free_session_key(session_key);
     return 0;
 }