✎ javacard:jcre:9.4.1.1_constrained_transfers_with_no_chaining [wiki]

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=== 9.4.1.1 Constrained Transfers With No Chaining ===

When the no chaining mode of output transfer is requested by the applet by calling the **setOutgoingNoChaining** method, the following protocol sequence shall be followed: 

When the no chaining mode is used (that is, after the invocation of the **setOutgoingNoChaining** method), calls to the **waitExtension** method shall throw an **APDUException** with reason code **ILLEGAL_USE**. 

== Notation ==

Le = CAD expected length. 

Lr = Applet response length set via **setOutgoingLength** method. 

 = the protocol byte equal to the incoming header INS byte, which indicates that all data bytes will be transferred next. 

 = the protocol byte that is the complement of the incoming header INS byte, which indicates that 1 data byte will be transferred next. 

 = the response status bytes as in ISO7816-4. 

== ISO 7816-4 CASE 2 ==

== Le__Lr ==

1. The card sends Lr bytes of output data using the standard T=0  or  procedure byte mechanism. 

2.  The card sends  completion status on completion of the **Applet.process** method. 

== Lr_ Le ==

1. The card sends  completion status bytes 

2.  The CAD sends GET RESPONSE command with Le = Lr. 

3.  The card sends Lr bytes of output data using the standard T=0  or  procedure byte mechanism. 

4.  The card sends  completion status on completion of the **Applet.process** method. 

== Lr_ Le ==

1. The card sends Le bytes of output data using the standard T=0  or  procedure byte mechanism. 

2.  The card sends  completion status bytes 

3.  The CAD sends GET RESPONSE command with new Le <= Lr. 

4.  The card sends (new) Le bytes of output data using the standard T=0  or  procedure byte mechanism. 

5.  Repeat steps 2-4 as necessary to send the remaining output data bytes (Lr) as required. 

6.  The card sends  completion status on completion of the **Applet.process** method. 

== ISO 7816-4 CASE 4 ==

In Case 4, Le is determined after the following initial exchange: 

1. The card sends  

2.  The CAD sends GET RESPONSE command with Le <= Lr. 

The rest of the protocol sequence is identical to CASE 2 described above. 

If the applet aborts early and sends less than Le bytes, zeros shall be sent instead to fill out the length of the transfer expected by the CAD.
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