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## javacard.framework.service
Interface SecurityService

All Superinterfaces:
  Service

    @TransactionType(value=NOT_SUPPORTED)
    public interface SecurityService

extends Service

This interface describes the functions of a generic security service. It extends the base `Service` interface and defines methods to query the current security status. Note that this interface is generic and does not include methods to initialize and change the security status of the service; initialization is assumed to be performed through `APDU` commands that the service is able to process.

A security service implementation class should extend `BasicService` and implement this interface.

Field Summary
`static short` | `PRINCIPAL_APP_PROVIDER` The principal identifier for the application provider.
`static short` | `PRINCIPAL_CARD_ISSUER` The principal identifier for the card issuer.
`static short` | `PRINCIPAL_CARDHOLDER` The principal identifier for the cardholder.
`static byte` | `PROPERTY_INPUT_CONFIDENTIALITY` This security property provides input confidentiality through encryption of the incoming command.
`static byte` | `PROPERTY_INPUT_INTEGRITY` This security property provides input integrity through MAC signature checking of the incoming command.
`static byte` | `PROPERTY_OUTPUT_CONFIDENTIALITY` This security property provides output confidentiality through encryption of the outgoing response.
`static byte` | `PROPERTY_OUTPUT_INTEGRITY` This security property provides output integrity through MAC signature generation for the outgoing response.

Method Summary
`boolean` | `isAuthenticated(short principal)` Checks whether or not the specified principal is currently authenticated.
`boolean` | `isChannelSecure(byte properties)` Checks whether a secure channel is established between the card and the host for the ongoing session that guarantees the indicated properties.
`boolean` | `isCommandSecure(byte properties)` Checks whether a secure channel is in use between the card and the host for the ongoing command that guarantees the indicated properties.

Methods inherited from interface javacard.framework.service.Service
`processCommand, processDataIn, processDataOut`

Field Detail

### PROPERTY_INPUT_CONFIDENTIALITY

    static final byte PROPERTY_INPUT_CONFIDENTIALITY

  This security property provides input confidentiality through encryption of the incoming command. Note that this is a bit mask and security properties can be combined by simply adding them together.

  See Also:
    Constant Field Values

### PROPERTY_INPUT_INTEGRITY

    static final byte PROPERTY_INPUT_INTEGRITY

  This security property provides input integrity through MAC signature checking of the incoming command. Note that this is a bit mask and security properties can be combined by simply adding them together.

  See Also:
    Constant Field Values

### PROPERTY_OUTPUT_CONFIDENTIALITY

    static final byte PROPERTY_OUTPUT_CONFIDENTIALITY

  This security property provides output confidentiality through encryption of the outgoing response. Note that this is a bit mask and security properties can be combined by simply adding them together.

  See Also:
    Constant Field Values

### PROPERTY_OUTPUT_INTEGRITY

    static final byte PROPERTY_OUTPUT_INTEGRITY

  This security property provides output integrity through MAC signature generation for the outgoing response. Note that this is a bit mask and security properties can be combined by simply adding them together.

  See Also:
    Constant Field Values

### PRINCIPAL_CARDHOLDER

    static final short PRINCIPAL_CARDHOLDER

  The principal identifier for the cardholder.

  See Also:
    Constant Field Values

### PRINCIPAL_CARD_ISSUER

    static final short PRINCIPAL_CARD_ISSUER

  The principal identifier for the card issuer.

  See Also:
    Constant Field Values

### PRINCIPAL_APP_PROVIDER

    static final short PRINCIPAL_APP_PROVIDER

  The principal identifier for the application provider.

  See Also:
    Constant Field Values

Method Detail

### isAuthenticated

    boolean isAuthenticated(short principal)
                            throws ServiceException

  Checks whether or not the specified principal is currently authenticated. The validity timeframe (selection or reset) and authentication method as well as the exact interpretation of the specified principal parameter needs to be detailed by the implementation class. The only generic guarantee is that the authentication has been performed in the current card session.

  Parameters:
    `principal` - an identifier of the principal that needs to be authenticated
  Returns:
    true if the expected principal is authenticated
  Throws:
    `ServiceException` - with the following reason code:
    - `ServiceException.ILLEGAL_PARAM` if the specified principal is unknown.

### isChannelSecure

    boolean isChannelSecure(byte properties)
                            throws ServiceException

  Checks whether a secure channel is established between the card and the host for the ongoing session that guarantees the indicated properties.

  Parameters:
    `properties` - the required properties
  Returns:
    true if the required properties are true, false otherwise
  Throws:
    `ServiceException` - with the following reason code:
    - `ServiceException.ILLEGAL_PARAM` if the specified property is unknown.

### isCommandSecure

    boolean isCommandSecure(byte properties)
                            throws ServiceException

  Checks whether a secure channel is in use between the card and the host for the ongoing command that guarantees the indicated properties. The result is only correct after pre-processing the command (for instance during the processing of the command). For properties on incoming data, the result is guaranteed to be correct; for outgoing data, the result reflects the expectations of the client software, with no other guarantee.

  Parameters:
    `properties` - the required properties
  Returns:
    true if the required properties are `true`, `false` otherwise
  Throws:
    `ServiceException` - with the following reason code:
    - `ServiceException.ILLEGAL_PARAM` if the specified property is unknown.

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