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# GPApplication - Reference Documentation

An instance of the GPApplication class represents an application on a Global Platform card.

Instances of this class are created using the getApplicationInstance() method of the application factory.

## Index of Methods

- GPApplication() constructor
- run()
- select()
- sendApdu()

## Properties

Type | Name | Description
--- | --- | ---
ByteString | aid | Application identifier for this application.
Card | card | Card object associated with application.
Card | crypto | Crypto object associated with application.
Array | data[] | Associative array of data elements.
Array | key[] | Associative array of keys.
Object | profile | Deserialized application profile.

## Constructor

### Prototype

GPApplication(String profile)

GPApplication(String profile, ByteString aid, Card card, Crypto crypto, Object dataMapper)

### Description

Create a GPApplication object and initialize from profile.

This constructor is provided for special development and testing purposes. The preferred method is to use the getApplicationInstance() method of the ApplicationFactory.

### Arguments

Type | Name | Description
--- | --- | ---
`String` | profile | Name of file containing Global Platform Application profile. The file name will be mapped to the file system of the runtime environment.
`ByteString` | aid | Application identifier for application.
`Card` | card | Card object to associate Application with or null if none defined.
`Crypto` | crypto | Crypto object to associate Application with.
`Object` | dataMapper | Data mapper object to be used for external data elements or null if none defined.

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.INVALID_ARGUMENTS | Too many arguments given
GPError | GPError.INVALID_TYPE | On or more arguments are not of the expected type

### Example

    var sd = new GPApplication("profiles/ap_sample.xml");

    assert(sd != null);

## run()

### Prototype

Void run(String scriptName)

### Description

Locate and execute script fragment in application profile.

This method does the complete initialization of the key and data properties according to the declarations for this script fragment

Key profiles are obtained from the ApplicationFactory that created the Application object.

External data elements are mapped using the data mapper defined in the constructor or the getApplicationInstance() method of the application factory.

Warning: This method is an extension to the methods defined in the Global Platform Scripting specification. It is provided as development and test aid.

### Arguments

Type | Name | Description
--- | --- | ---
`String` | scriptName | Name of script fragment to execute.

### Return

`Void` | The method does not return a value

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | Type of argument is invalid for method invocation

### Example

## select()

### Prototype

ByteString select()

ByteString select(Boolean next, Boolean noData)

ByteString select(Boolean next, Number[] sw)

ByteString select(Boolean next, Boolean noData, Number[] sw)

### Description

Select application on ICC.

### Arguments

Type | Name | Description
--- | --- | ---
`Boolean` | next | Used to control parameter P1 in the select command. True will select next application with matching AID. Default is false.
`Boolean` | noData | Ignore data returned from card. Default is false.
`Number[]` | sw | Array of acceptable SW1/SW2 response codes.

### Return

`ByteString` | Data returned from card in response to select.

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | Type of argument is invalid for method invocation

### Example

    /*
    var aid = new ByteString("D040000017010101", HEX);
    var card = new Card(_scsh3.reader);
    var crypto = new Crypto();

    var application = new GPApplication("profiles/ap_test.xml", aid, card, crypto,
                                        new Object());

    var resp = application.select();
    assert(resp instanceof ByteString);
    print(resp);

    var resp = application.select(false, false);
    assert(resp instanceof ByteString);
    print(resp);

    var resp = application.select(false, [ 0x9000 ]);
    assert(resp instanceof ByteString);
    print(resp);

    var resp = application.select(true, false, [ 0x6A86 ]);
    assert(resp instanceof ByteString);
    print(resp);
    */

## sendApdu()

### Prototype

ByteString sendApdu (Number cla, Number ins, Number p1, Number p2)

ByteString sendApdu (Number cla, Number ins, Number p1, Number p2, Number[] sw)

ByteString sendApdu (Number cla, Number ins, Number p1, Number p2, ByteString data)

ByteString sendApdu (Number cla, Number ins, Number p1, Number p2, ByteString data, Number[] sw)

ByteString sendApdu (Number cla, Number ins, Number p1, Number p2, Number le)

ByteString sendApdu (Number cla, Number ins, Number p1, Number p2, Number le, Number[] sw)

ByteString sendApdu (Number cla, Number ins, Number p1, Number p2, ByteString data, Number le)

ByteString sendApdu (Number cla, Number ins, Number p1, Number p2, ByteString data, Number le, Number[] sw)

### Description

Transmit a Command-APDU to the ICC and receive the Response-APDU.

The method updates the fields SW, SW1, SW2 and response of the associated card object with the values received from the ICC.

An array of valid return codes can be passed as argument sw. If the SW1/SW2 from the ICC does not match with one of the entries in the array, then an GPError.CARD_COMM_ERROR exception is raised.

The method supports ISO7816-4 extended format. This is automatically used, if the length of the data argument exceeds 255 or if the argument le exceeds 256.

### Arguments

Type | Name | Description
--- | --- | ---
`Number` | cla | The CLA byte for the Command-APDU
`Number` | ins | The INS byte for the Command-APDU
`Number` | p1 | The P1 byte for the Command-APDU
`Number` | p2 | The P2 byte for the Command-APDU
`ByteString` | data | The data bytes to be send in the Command-APDU for case 3 or case 4 commands
`Number` | le | The number of bytes expected in the response. 256 is encoded as '00' in short format. 65536 is encoded as '0000' in extended format.
`Number[]` | sw | Array of acceptable SW1/SW2 return codes

### Return

`ByteString` | Response APDU received from ICC

### Exceptions

Name | Value | Description
--- | --- | ---
GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call
GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call
GPError | GPError.INVALID_TYPE | Type of argument is invalid for call or SW array contain a type other than Number
GPError | GPError.CARD_COMM_ERROR | A communication error with the ICC occured
GPError | GPError.CARD_INVALID_SW | The status word return by the ICC does not match one of the expected result
GPError | GPError.DATA_TOO_LARGE | The data for the command APDU exceeds 65536
GPError | GPError.INVALID_LENGTH | The value given for Le is out of range

### Example

    /*
    // Case 1: 0022F3A4 - MANAGE SE

    resp = application.sendApdu(0x00, 0x22, 0xF3, 0xA4);
    assert(resp instanceof ByteString);
    print(application.card.SW.toString(16) + " - " + resp);

    resp = card.sendApdu(0x00, 0x22, 0xF3, 0xA4, [0x9000]);
    assert(resp instanceof ByteString);

    // Case 2: 00B201F400 - READ RECORD from EF_STATUS

    resp = card.sendApdu(0x00, 0xB2, 0x01, 0x24, 0);
    assert(resp instanceof ByteString);
    print(card.SW.toString(16) + " - " + resp);

    assert(resp.length > 0);
    assert(application.card.SW == 0x9000);

    resp = card.sendApdu(0x00, 0xB2, 0x01, 0x24, 0, [0x9000]);
    assert(resp.length > 0);

    // Case 3: 002A90A008 - HASH

    resp = application.sendApdu(0x00, 0x2A, 0x90, 0xA0,
                new ByteString("9000800431323334", HEX));
    assert(resp instanceof ByteString);
    print(application.card.SW.toString(16) + " - " + resp);

    assert(card.SW == 0x9000);

    resp = application.sendApdu(0x00, 0x2A, 0x90, 0xA0,
                new ByteString("9000800431323334", HEX),[0x9000]);

    // Case 4: 00A40204022F0000 - SELECT EF_STATUS

    resp = application.sendApdu(0x00, 0xA4, 0x02, 0x04, new ByteString("EF04", HEX), 0);
    assert(resp instanceof ByteString);
    print(application.card.SW.toString(16) + " - " + resp);

    assert(application.card.SW == 0x9000);
    assert(resp.length > 0);

    resp = application.sendApdu(0x00, 0xA4, 0x02, 0x04,
                new ByteString("EF04", HEX), 0, [0x9000]);
    assert(resp.length > 0);
    */

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