Session.OpenBasicChannel Method
Definition
Important
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Overloads
| OpenBasicChannel(Byte[]) |
This method is provided to ease the development of mobile application and for compliancy with existing applications. |
| OpenBasicChannel(Byte[], SByte) |
Get an access to the basic channel, as defined in the ISO/IEC 7816-4 specification (the one that has number 0). |
OpenBasicChannel(Byte[])
This method is provided to ease the development of mobile application and for compliancy with existing applications.
[Android.Runtime.Register("openBasicChannel", "([B)Landroid/se/omapi/Channel;", "", ApiSince=28)]
public Android.SE.Omapi.Channel? OpenBasicChannel (byte[]? aid);[<Android.Runtime.Register("openBasicChannel", "([B)Landroid/se/omapi/Channel;", "", ApiSince=28)>]
member this.OpenBasicChannel : byte[] -> Android.SE.Omapi.ChannelParameters
- aid
- Byte[]
the AID of the Applet to be selected on this channel, as a byte array, or null if no Applet is to be selected.
Returns
an instance of Channel if available or null.
- Attributes
Remarks
This method is provided to ease the development of mobile application and for compliancy with existing applications. This method is equivalent to openBasicChannel(aid, P2=0x00)
Java documentation for android.se.omapi.Session.openBasicChannel(byte[]).
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Applies to
OpenBasicChannel(Byte[], SByte)
Get an access to the basic channel, as defined in the ISO/IEC 7816-4 specification (the one that has number 0).
[Android.Runtime.Register("openBasicChannel", "([BB)Landroid/se/omapi/Channel;", "", ApiSince=28)]
public Android.SE.Omapi.Channel? OpenBasicChannel (byte[]? aid, sbyte p2);[<Android.Runtime.Register("openBasicChannel", "([BB)Landroid/se/omapi/Channel;", "", ApiSince=28)>]
member this.OpenBasicChannel : byte[] * sbyte -> Android.SE.Omapi.ChannelParameters
- aid
- Byte[]
the AID of the Applet to be selected on this channel, as a byte array, or null if no Applet is to be selected.
- p2
- SByte
the P2 parameter of the SELECT APDU executed on this channel.
Returns
an instance of Channel if available or null.
- Attributes
Remarks
Get an access to the basic channel, as defined in the ISO/IEC 7816-4 specification (the one that has number 0). The obtained object is an instance of the Channel class. If the AID is null, it means no Applet is to be selected on this channel and the default Applet is used. If the AID is defined then the corresponding Applet is selected. Once this channel has been opened by a device application, it is considered as "locked" by this device application, and other calls to this method will return null, until the channel is closed. Some Secure Elements (like the UICC) might always keep the basic channel locked (i.e. return null to applications), to prevent access to the basic channel, while some other might return a channel object implementing some kind of filtering on the commands, restricting the set of accepted command to a smaller set. It is recommended for the UICC to reject the opening of the basic channel to a specific applet, by always answering null to such a request. For other Secure Elements, the recommendation is to accept opening the basic channel on the default applet until another applet is selected on the basic channel. As there is no other way than a reset to select again the default applet, the implementation of the transport API should guarantee that the openBasicChannel(null) command will return null until a reset occurs. With previous release (V2.05) it was not possible to set P2 value, this value was always set to '00'.Except for specific needs it is recommended to keep P2 to '00'. It is recommended that the device allows all values for P2, however only the following values are mandatory: '00', '04', '08', '0C'(as defined in [2]) The implementation of the underlying SELECT command within this method shall be based on ISO 7816-4 with following options: <ul> <li>CLA = '00'</li> <li>INS = 'A4'</li> <li>P1 = '04' (Select by DF name/application identifier)</li> </ul>
The select response data can be retrieved with byte[] getSelectResponse(). The API shall handle received status word as follow. If the status word indicates that the Secure Element was able to open a channel (e.g. status word '90 00' or status words referencing a warning in ISO-7816-4: '62 XX' or '63 XX') the API shall keep the channel opened and the next getSelectResponse() shall return the received status word. Other received status codes indicating that the Secure Element was able not to open a channel shall be considered as an error and the corresponding channel shall not be opened. The function without P2 as parameter is provided for backwards compatibility and will fall back to a select command with P2='00'.
Java documentation for android.se.omapi.Session.openBasicChannel(byte[], byte).
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.