Select command handling

hey guys i am handling Selec command.i ahve a doubt as to how can a select command which comes as case 2 be handled in t=0 and t=1 protocol.
the command is 00 a4 04 00 00

CDTPCAPI wrote:
ok let take the scenario:
1.usual case:
when a select command is issued with p3=08 (00a40400081122334455667788)and followed by 8 bytes aid,the select handler will search card registry for a partial/full match for the given aid in the apdu buffer.
2.Now if select command comes with P3=00(00a4040000),it signifies that isd must be selectd and its responce data must be sent to the terminal.
As per the the defin of select command, a select command is always followed by an aid and p3 is considered Lc for the command.But when select comes with p3=00 (00a4040000) the Lc and data field of the command must be ignore,Le should be set to 00 and it shu now be handled as a case 2 command.
Now for a case 2 command(emv std) whever the le field is 00, an errro status of 6cxx must be sent so that the previous command header is repeated with le set to xx.6Cxx is a warning condition, not an error.
So in above discussu lets say Isd selection generated 12hex bytes of data and the termianl issues 00a4040000.So folowin the protocol,6c12 will be sent out.the termianl willnow repeat select command as 00a4040012.
So now while procesing,there is no way to find out that the select command was previous a case 2 commmandYou're correct in your finding that JC and EMV specs clash at this point. Thats why VGP describes the above situation and mandates EMV compliance, thus violating JC. I cannot paste you the content (as VGP is not an open specification), but you can get an idea when looking into GP 2.1.1: A.2 GlobalPlatform on a Java Card, T=0 Transmission Protocol:
T=0 Transmission Protocol
GlobalPlatform cards are intended to be functional in the widest range of environments (i.e. Card Acceptance
Devices). Currently the Java Card 2.1.1 Runtime Environment (JCRE) Specifications and the Java Card 2.2
Runtime Environment (JCRE) Specifications describe the behavior for case 2 commands (when using the T=0
protocol) in contradiction to EMV 2000. GlobalPlatform mandates that the JCRE shall handle this case of
command in accordance with ISO/IEC 7816: An applet receiving a case 2 command builds the response and
invokes the appropriate API to output the data. If the data is less than the data expected by the terminal, the
OPEN will store the data and output a 6Cxx response code and wait for the CAD to re-issue the command with
the correct length. When the re-issued command is received the JCRE will manage the outputting of the stored
data.As you seem to be working on a smart card OS, you will have control over the communication layer.

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The data type for GV_ST_DATE, P_DATE are SY-datum
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user13478417 wrote:
I m working on one assignment where I am not allowed to create any object into the database e.g. Create temporary tables, use of cursors etc.Then cease to use Oracle - immediately. As you are violating your assignment constraints.
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Hello all.
I have a question.
I am making an applet.
Into the Select command, I think my applet cannot get the Le data.
The Le value has always '00' even though the select command Le value has been changed.
First, in order to get the Le, I used the apdu.setOutgoing(), which returns Le, and then I checked the Le != 0.
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I know why the applet returns 9000.
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Thank you.
글 수정: Jin

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I'm expecting more details from you to fully understand the problem.

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Author:   [email protected]
Date:     2009-10-07 18:52:06 -0700 (Wed, 07 Oct 2009)
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