# ese-ls-provision tool

Runs on Android host and uploads scripts to the secure element loader service.

## Introduction

PN80T and later secure elements include a "loader service" which runs signed, encrypted scripts to
perform high-privilege operations like installing and deleting applets in a secure way. The result
of compiling, encrypting and signing these scripts with the `ls-cgt.jar` tool is a file containing
hexadecimal blocks separated by newlines; the first line usually starting with `7f21` indicating
the certificate for the signing key. This tool takes those signed, encrypted scripts and sends
them to the secure element.

## Usage

    ese-ls-provision <identifier> <script> <responsefile>

- `<identifier>` names a file of one to twenty bytes. This is a required parameter to the code
which drives communication with the loader service, and the identifier is sent to the SE as part
of the initial setup, but I'm not sure what effect it has apart from that; the source code says
"It is used to provide the ALA with an Unique Identifier of the Application that has triggered the
ALA script".
- `<script>` is the compiled, encrypted, signed scrypt as generated by `ls-cgt.jar`.
- `<responsefile>` is a file to which to write the response from the loader service. This is also
written as newline-separated hexadecimal. On a successful upload, each line ends with `9000`.