This is a very simple Java Card applet implementing a secure counter. It is based on the Fidesmo gradle plugin example. You can read all about it in this tutorial.
- When installed, the applet will receive the initial counter value as an install parameter. The initial counter value is limited to 1 byte: otherwise installation will fail with error code
6985, "conditions of use not satisfied" - Command SELECT (A4) will return the current value of the counter
- Command DECREMENT (00):
- If counter > 0, it will decrease its value and return the new value of the counter
- If counter = 0, it will return an error code
6985
To build this project, use gradle:
./gradlew build - Build the application and create the CAP-file.
Then you can upload the CAP-file to your account at Fidesmo Developers Portal using the /executableLoadFiles POST operation, and use the Fidesmo Android app to install it on any Fidesmo-enabled device.
The code in this repository is not written to be released, only as an example to be shared with a customer.