From cd393ae59af4302c63b2660e43d0018d29b1f2ab Mon Sep 17 00:00:00 2001
From: Dan Goldsmith <aa9863@coventry.ac.uk>
Date: Wed, 18 Nov 2020 16:11:46 +0000
Subject: [PATCH] First set of Overflows added

---
 firstOverflow.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 hello.c         | 13 +++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 firstOverflow.c
 create mode 100644 hello.c

diff --git a/firstOverflow.c b/firstOverflow.c
new file mode 100644
index 0000000..fc462f7
--- /dev/null
+++ b/firstOverflow.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int BUFFER=100;
+
+void win(void){
+    /*Win Condition
+      We Want to jump here
+    */
+    printf("\n ===== Win ===== \n\n");
+    system("/bin/sh");  //Tradition to get a shell
+}
+
+void lose(void){
+    /* Lose Condition */
+    printf("Current Memory Address is %p\n",lose);
+    printf("Aim for %p\n", win);    
+    printf("Lose :(\n");
+}
+
+int main(int argc, char* argv[]){
+    /* Main Function*/
+    
+    //Pointer to the lose function
+    void (*fp)(void) = lose;
+
+    char buffer[BUFFER];
+    printf("Overflow the Buffer\n");
+
+    if (argc != 2){
+	printf("Overflow the buffer\n");
+	printf("Hint! Try `python -c \"print 'A'*100\"`\n");
+	return -1;
+    }
+      
+    memcpy(buffer, argv[1], strlen(argv[1]));
+    printf("Off to %p\n",fp);
+    fp();
+    
+    return 0;
+}
diff --git a/hello.c b/hello.c
new file mode 100644
index 0000000..0895eb8
--- /dev/null
+++ b/hello.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+int add(int var1, int var2){
+  //Add two numbers
+  int total;
+  total = var1+var2;
+}
+
+void main(int argv, char* argc){
+  //Function call
+  int total = add(10, 20);
+  printf("Total is %d \n", total);
+}