Scramble input

client.c

@@ -10,6 +10,15 @@
 #include <zlib.h>
 
 #define BUF_LEN 1024
+#define SECRET "eiph0aChThu17ah9rua4Naiv4"
+
+char *unscramble(char *s) {
+    for (char *str = s + 1; *str != 0; str += 2) {
+        *s++ = *str;
+    }
+    *s = '\0';
+    return s;
+}
 
 void open_connection(const char *hostname, const char *port, const char *msg) {
     int sfd, s;
@@ -64,12 +73,17 @@ void open_connection(const char *hostname, const char *port, const char *msg) {
         fprintf(stderr, "No compression methods enabled\n");
     }
 
+    char flag[sizeof(SECRET)];
+    strcpy(flag, SECRET);
+    unscramble(flag);
+
     char buf[BUF_LEN] = {0};
     strcat(buf, "GET /");
     strncat(buf, msg, BUF_LEN / 2);
     strcat(buf, " HTTP/1.1\r\nHost: iut.local\r\n");
     strcat(buf, "Connection: close\r\n");
-    strcat(buf, "Cookie: flag=bAr5\r\n");
+    strcat(buf, "Cookie: flag=");
+    strcat(buf, flag);
     strcat(buf, "\r\n");
     SSL_write(ssl, buf, strlen(buf));
 
@@ -77,8 +91,8 @@ void open_connection(const char *hostname, const char *port, const char *msg) {
         uLong ucompSize = strlen(buf);
         // Use a compression level of 9
         uLong compSize = compressBound(ucompSize);
-        char *comp = malloc(compSize);
-        compress(comp, &compSize, buf, ucompSize);
+        Bytef *comp = malloc(compSize);
+        compress(comp, &compSize, (unsigned char *)buf, ucompSize);
         free(comp);
         printf("Sent %lu data bytes\n", compSize);
     } else {