Initial commit

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

1 files changed, 107 insertions, 0 deletions

diff --git a/client/main.c b/client/main.c
new file mode 100644
index 0000000..1551065
--- /dev/null
+++ b/client/main.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <net/stpsession.h>
+#include <crypto/ecdh.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+
+#define CENTRAL_SERVER "149.248.6.149"
+#define OSTP_PORT 5352
+
+static void
+log_pubkey(unsigned char *pubkey)
+{
+    for (size_t i = 0; i < 32; ++i) {
+        printf("%02X ", pubkey[i] & 0xFF);
+        if (i != 0 && i % 4 == 0) {
+            printf("\n");
+        }
+    }
+    printf("\n");
+}
+
+static int
+request_session(void)
+{
+    struct sockaddr_in addr;
+    struct session_request stp_sq;
+    struct x25519_keypair keypair;
+    int error, sockfd;
+
+    addr.sin_family = AF_INET;
+    addr.sin_addr.s_addr = inet_addr(CENTRAL_SERVER);
+    addr.sin_port = htons(OSTP_PORT);
+
+    sockfd = socket(AF_INET, SOCK_STREAM, 0);
+    if (sockfd < 0) {
+        return sockfd;
+    }
+
+    error = connect(sockfd, (struct sockaddr *)&addr, sizeof(addr));
+    if (error < 0) {
+        printf("Failed to connect!\n");
+        close(sockfd);
+        return error;
+    }
+
+    printf("Generating keys...\n");
+
+    /* Generate an ephemeral keypair */
+    if ((error = gen_x25519_keypair(&keypair)) < 0) {
+        printf("Key generation failed!\n");
+        close(sockfd);
+        return error;
+    }
+
+    /*
+     * Setup the session request and add our public
+     * key to it.
+     *
+     * TODO: Use the 'U' bit in options.
+     */
+    memset(stp_sq.hash, 0, sizeof(stp_sq.hash));
+    stp_sq.options = 0;
+    memcpy(stp_sq.pubkey, keypair.pubkey, sizeof(stp_sq.pubkey));
+    log_pubkey(keypair.pubkey);
+
+    printf("Sending session request...\n");
+    send(sockfd, &stp_sq, sizeof(stp_sq), 0);
+    close(sockfd);
+    return 0;
+}
+
+int
+main(void)
+{
+    return request_session();
+}