Update README.md

Author: pnoltof

README.md

@@ -21,3 +21,30 @@ For the demo:
 ```FuzzedDataProvider fuzz_data(Data, Size);```  
 ```mocklib_set_data(&fuzz_data);```
 - You also need to include the FuzzedDataProvider.h and mocklib.h in the fuzztest
+- Now the fuzz test can run
+- To create a fuzz test for all the functions fill in the excel sheet testgen_functions.xlsx like this:  
+
+| enum crypto_return_status crypto_calculate_hmac(const uint8_t * message, int len, crypto_hmac * hmac) | message: ARG_DATA()                    | len: ARG_SIZE()    | hmac: ARG_STRUCT_PTR(crypto_hmac) |   |
+|-------------------------------------------------------------------------------------------------------|----------------------------------------|--------------------|-----------------------------------|---|
+| enum crypto_return_status crypto_set_key(crypto_key key)                                              | key: ARG_STRUCT(crypto_key)            |                    |                                   |   |
+| enum crypto_return_status crypto_set_nonce(crypto_nonce nonce)                                        | nonce: ARG_STRUCT(crypto_nonce)        |                    |                                   |   |
+| enum crypto_return_status crypto_verify_hmac(const uint8_t * message, int len, crypto_hmac * hmac)    | message: ARG_DATA()                    | len: ARG_SIZE()    | hmac: ARG_STRUCT_PTR(crypto_hmac) |   |
+| enum crypto_return_status crypto_verify_key(crypto_key key)                                           | key: ARG_STRUCT(crypto_key)            |                    |                                   |   |
+| enum crypto_return_status crypto_verify_nonce(crypto_nonce * nonce)                                   | nonce: ARG_STRUCT_PTR(crypto_nonce)    |                    |                                   |   |
+| uint8_t * generate_random_bytes(uint8_t * buffer, uint8_t length)                                     | buffer: ARG_DATA()                     | length: ARG_SIZE() |                                   |   |
+| enum GPS_return_status get_current_position(GPS_position * position)                                  | position: ARG_STRUCT_PTR(GPS_position) |                    |                                   |   |
+| void key_management_create_key(uint8_t * key, uint8_t length)                                         | key: ARG_DATA()                        | length: ARG_SIZE() |                                   |   |
+| void key_management_create_nonce(uint8_t * nonce, uint8_t length)                                     | nonce: ARG_DATA()                      | length: ARG_SIZE() |                                   |   |
+| enum GPS_return_status set_destination_postition(GPS_position position)                               | position: ARG_STRUCT(GPS_position)     |                    |                                   |   |
+| enum crypto_state crypto_get_state()                                                                  |                                        |                    |                                   |   |
+| void crypto_init()                                                                                    |                                        |                    |                                   |   |
+| GPS_position get_destination_position()                                                               |                                        |                    |                                   |   |
+| enum GPS_return_status init_crypto_module()                                                           |                                        |                    |                                   |   |
+| int time_current_time()                                                                               |                                        |                    |                                   |   |
+- Then generate the fuzz test with the following command:
+- ```python3 gen_tests.py fuzztests gen_template/testgen_functions.xlsx .```  
+- This will create a file fuzztest.c. Copy its content to your own fuzztest
+- Include crypto_module_types.h and GPS_module_types.h in the fuzztest
+- Run the fuzztest
+
+