Forking Version added (#14)

* Forking Version added

* Fstrings Version Addd

Week8_Canaries/Forks/forking.c

@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <string.h>
+
+int processData(void){
+  printf("Please Enter Data >");
+  char data[128];
+  gets(data);
+  printf(data);
+  return 1;
+}
+
+int main(int argc, char *argv){  
+  printf("Smash the Forking Stack\n");
+
+  while(1){
+    int pid = fork();
+    if(pid == 0){
+      //Child Deals with data
+      processData();
+      printf("Child Returns\n");
+      return 0;
+    }
+    else{
+      //Parent gets on with Life
+      printf("Parent Waits on Child\n");
+      wait(NULL);
+
+    }
+  }
+}
+

Week8_Canaries/Forks/makefile

@@ -0,0 +1,7 @@
+CC = gcc
+FLAGS = -no-pie -g
+
+forking: forking.c
+	$(CC) $(FLAGS) forking.c -o forking
+
+all: forking

Week8_Canaries/Fstrings/forking.c

@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <string.h>
+
+int processData(void){
+  printf("Please Enter Data >");
+  char data[32];
+  gets(data);
+  printf(data);
+  return 1;
+}
+
+int main(int argc, char *argv){  
+  printf("Smash the Forking Stack\n");
+
+  while(1){
+    int pid = fork();
+    if(pid == 0){
+      //Child Deals with data
+      processData();
+      printf("Child Returns\n");
+      return 0;
+    }
+    else{
+      //Parent gets on with Life
+      printf("Parent Waits on Child\n");
+      wait(NULL);
+
+    }
+  }
+}
+

Week8_Canaries/Fstrings/makefile

@@ -0,0 +1,7 @@
+CC = gcc
+FLAGS = -no-pie -g
+
+forking: forking.c
+	$(CC) $(FLAGS) forking.c -o forking
+
+all: forking

Week8_Canaries/Static/makefile

@@ -0,0 +1,7 @@
+CC = gcc
+FLAGS = -fno-stack-protector -no-pie -g --static
+
+static: static.c
+	$(CC) $(FLAGS) static.c -o static
+
+all: static

Week8_Canaries/Static/static.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+
+// We Use a Sruct as it means we can be sure that the memory layout stays the same
+
+struct staticMemory {
+  char buffer[20];
+  int canary;
+};
+
+
+int win(){
+  system("/bin/sh");
+}
+
+int main(int argc, char *argv){
+
+  //Initilise our memory
+  struct staticMemory myMemory;
+
+  //And the Canary
+  myMemory.canary = 0xDEADBEEF;
+
+  printf("Enter your String\n");
+  gets(myMemory.buffer);
+
+
+  //And Do our check
+  if (myMemory.canary != 0xDEADBEEF){
+    printf("Stack Smashing Detected!!!\n");
+    exit(-1);
+  }
+
+  return 1;
+
+}