Security
Provisioning
• Provisioning Profile
• En/tlements
• Code Signature
Jailbreaking
• Altering the opera/ng system to allow opera/ons not permi4ed
by default.
• Requires an exploit of the OS.
• Removes security measures (sandboxing, code signing).
Objec&ve-C Run&me
• object oriented, dynamic, run2me oriented, strict superset of C
• objects communicate by sending messages to each other
• applicable to Swi<
Objec&ve-C Run&me
typedef struct objc_class *Class;
struct objc_object {
Class isa;
};
typedef struct objc_object *id;
typedef struct objc_selector *SEL;
Objec&ve-C Run&me
[self printMessageWithString:@"Hello World!"];
objc_msgSend(self,@selector(printMessageWithString:),@"Hello World!");
Objec&ve-C Run&me
Ivar *class_copyIvarList(Class cls, unsigned int *outCount)
Ivar class_getInstanceVariable(Class cls, const char *name)
Ivar class_getClassVariable(Class cls, const char *name)
void objc_setAssociatedObject(id object, const void *key, id value, objc_AssociationPolicy policy)
id objc_getAssociatedObject(id object, const void *key)
void objc_removeAssociatedObjects(id object)
Objec&ve-C Run&me
Method *class_copyMethodList(Class cls, unsigned int *outCount)
Method class_getInstanceMethod(Class cls, SEL name)
BOOL class_addMethod(Class cls, SEL name, IMP imp, const char *types)
IMP class_replaceMethod(Class cls, SEL name, IMP imp, const char *types)
void method_getArgumentType(Method m, unsigned int index, char *dst, size_t dst_len)
void method_getReturnType(Method m, char *dst, size_t dst_len)
IMP method_getImplementation(Method m)
IMP method_setImplementation(Method m, IMP imp)
void method_exchangeImplementations(Method m1, Method m2)
Reverse Engineering