How to use apdu commands

I see that the demo app you guys supplied has a default APDU command of 0x Any pointers or advice would be so appreciated! Finally, you should look through the ACR35 User Guide to make sure you have a good feel of how to use their app and device.

Most applications these days can be put together by just using the NFC tag UID as a reference to a record in a backend datastore. If not your iPhone volume is low or the ACR35 needs to be charged. This will pull the tag into reset and get some basic protocol information. This is what I get when reading one of our NFC stickers :. Once you have this working, you should be able to use the ACR35 app source code to build a simple app to just grab UIDs from wristbands for you.

Also, if you look through the FloJackExample code you can snatch some audio playback code that will route sounds to the iPhone speakers when the ACR35 is plugged in to indicate successful scans. A good feature to make the solution more usable.

how to use apdu commands

Register Log In Cart Checkout. Concepts Products Docs Forums. List of APDU codes. Viewing 2 posts - 1 through 2 of 2 total. October 9, at pm David Bhag karna sikhe. Hi there!

We just got our ACR35 reader in the mail and we are excited to start hacking away. Richard Keymaster. Hope that helps. You must be logged in to reply to this topic. Search for:. Log In Username:. Remember Me. Log In. Forums Blog Shop About.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have a terminal that has its own API to stablish and send commands between chip and terminal, there is a function that transmits the APDU command and returns the answer in a byte array. And the response to that command is 6E 00 class not supported. My device works with ISO as technical specifications.

I ask this because I have read that an APDU command must have 5 values at least, but I don't know what to send in the fifth parameter. I don't know what the lenght of the response is. If the command where correct, in place of where I see 6E 00 at the moment, would I see the information as plain text when cast to a string? The input and output values that you showed in your question suggest that your use of the method transceive is correct, i.

Your question regarding the format and validity of APDU commands is rather broad. Since you tagged the question with emv and mention the application primary account number, you are probably interacting with some form of EMV payment card e. In that case, you would probably want to study the various specifications for EMV payment systems which define the data structures and application-specific commands for those cards.

Such a 4-byte APDU is called "case 1". This means that the command APDU does not contain a data field sent to the card and that the card is not expected to generate a response data field. So the response APDU is expected to only contain a response status word:.

The 5th byte is a length field or part of a length field in case of extended length APDUs, which I won't further explain in this post. Depending on the case, this length field may have two meanings:.

If the command APDU does not have a data field, that length field indicates the expected length Ne of the response data field:. If the command APDU itself has a data field, that length field indicates the length Nc of the command data field:. If there is a command data field and the command is expected to generate response data, that command APDU may again be followed by an Le field:.

Since you expect the card to deliver a response data field i. Hence, a valid format would be.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here.

Trace APDU on Windows

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. For example in its document it is mentioned that you can get firmware version of your reader using following command:.

I even sniffed USB port to see what exactly exchanged in the connection between my PC and my reader for this function:.

I want to get my reader version and maybe send other extended commands using other tools or via code, but I must insert a card in the card reader to be able sending commands, otherwise I receive No Card Present exception, while I don't want to send commands to card! I wrote following python script to send extended commands.

In the above program, I can send commands to my reader using both connection. I mean, if I stop running and rerun it, the second method throw an exception:. As you see above, I can't use second method anymore and I need to power-off the reader and power on it again to make it work fine again. Note that I tried different readers, it seems that this is not limited only ti this reader. Some ACS readers also have a similar or exactly the same problem with rerun.

And finally, from the view of Reader, what's the difference between connection. When you stop "Smart Card" service, does the tool still return a firmware version? Also take a look at this question. I just tried it and it seems to work for Windows 10 at least. Communication was possible with no card inserted.

I did not test for other Windows versions though. Learn more. How to send commands to smart card reader and not to the smart card while no card present? Ask Question. Asked 4 years, 2 months ago. Active 27 days ago. Viewed 8k times. Wrong reader or No card present Try again?

Questions: 1- How to send extended commands to reader while there is no card available?By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have a terminal that has its own API to stablish and send commands between chip and terminal, there is a function that transmits the APDU command and returns the answer in a byte array. And the response to that command is 6E 00 class not supported. My device works with ISO as technical specifications. I ask this because I have read that an APDU command must have 5 values at least, but I don't know what to send in the fifth parameter.

I don't know what the lenght of the response is. If the command where correct, in place of where I see 6E 00 at the moment, would I see the information as plain text when cast to a string? The input and output values that you showed in your question suggest that your use of the method transceive is correct, i.

Your question regarding the format and validity of APDU commands is rather broad. Since you tagged the question with emv and mention the application primary account number, you are probably interacting with some form of EMV payment card e. In that case, you would probably want to study the various specifications for EMV payment systems which define the data structures and application-specific commands for those cards.

Such a 4-byte APDU is called "case 1". This means that the command APDU does not contain a data field sent to the card and that the card is not expected to generate a response data field. So the response APDU is expected to only contain a response status word:. The 5th byte is a length field or part of a length field in case of extended length APDUs, which I won't further explain in this post.

Depending on the case, this length field may have two meanings:.

Smart Card Framework for .NET

If the command APDU does not have a data field, that length field indicates the expected length Ne of the response data field:. If the command APDU itself has a data field, that length field indicates the length Nc of the command data field:. If there is a command data field and the command is expected to generate response data, that command APDU may again be followed by an Le field:.Optionally, apdutool can write this information to a log file.

If you have a source release, you can localize messages from apdutool. Running apdutool. Setting Default Applets. The file to invoke apdutool is a batch file apdutool. The default port is See the flag -p. Specifies an output file. If an output file is not specified with the -o flag, output defaults to standard output.

how to use apdu commands

Required if the APDU script is using contacted and contactless commands multiple times in the same script file and the script switches between contacted and contactless interfaces many times. Directing Output to the Console. Directing Output to a File. This command example runs the apdutool with the file example. Output in this example is sent to the console. The default TCP port is used. Output in this examples is written to the file example.

C-APDUs may extend across multiple lines. Table describes each supported script file command in detail noting that they are not case sensitive. Echoes the quoted string to the output file. The leading and trailing quote characters are removed.

Sends a powerup command to the reader in the active interface. A powerup command must be sent to the reader prior to executing any APDU on the selected interface.

Opens the channel with the channel number specified by channel-no on the origin channel specified by origin-channelwhere channel-no is an integer. The default value for the origin channel is basic channel number 0. Closes the channel having the channel number specified by channel-no on origin channel origin-channelwhere channel-no is an integer. The default origin channel is 0 and possible values are 0 - APDUScript supports preprocessor directives as depicted in the following script file example, test.

To check what the preprocessor has done, run the APDUTool with the -k flag to create a file named test. The test. The RI supports setting distinct default applets on distinct logical channels and distinct interfaces. You can use this request to set the default applet for a particular logical channel in the specified interface.

The applet being set as default must be properly registered with the RI prior to issuing this command. YY is the interface ID where the applet is configured as the default. The on-card installer applet AID is: 0xa0,0x00,0x00,0x00,0x62,0x03,0x01,0x08,0x Running apdutool The file to invoke apdutool is a batch file apdutool. To run the apdutool :.ISO part 4, section. When international interchange is required, a set of card system services and related commands is defined in clause 9.

The impact of secure messaging see 5. The list of error and warning conditions give in each clause 6. The Read Binary response message gives part of the content of an EF with transparent structure. When the command contains a valid short EF identifier, it sets the file as current EF. The command is processed on the currently selected EF. The command can be performed only if the security status satisfies the security attributes defined for this EF for the read function.

how to use apdu commands

The command shall be aborted if it is applied to an EF without transparent structure. If the Le field contains only zeroes, then within the limit of for short length or for extended length, all the bytes until the end of the file should be read.

Smart Card Framework for .NET

Depending upon the file attributes, the command shall perform one of the following operations :. When no indication is given in the data coding byte, the logical OR behavior shall apply.

The command can be performed only if the security status satisfies the security attributes for the write functions. Once a WRITE BINARY has been applied to a data unit of a one-time write EF, any further write operation referring to this data unit will be aborted if the content of the data unit or the logical erased state indicator if any attached to this data unit is different from the logical erased state.

The command shall be aborted if is is applied to an EF without transparent structure. The command can be performed only if the security status satisfies the security attributes for the update function. The command can be performed only if the security status satisfies the security attributes for the erase function. The command can be performed only if the security status satisfies the security attributes for this EF for the read function.

If an EF is currently selected at the time of issuing the command, then this command may be processed without identification of this file. When the command contains a valid short EF identifier, it sets the file as current EF and resets the current record pointer. The command shall be aborted if applied to an EF without record structure. If the Le field contains only zeros, then depending on bit of P2 and within the limit of for short length or for extended length, the command should read completely.Optionally, the APDU tool can write this information to a log file.

This chapter includes the following sections:. The file used to invoke the APDU tool is the apdutool.

Send Receive APDU commands on ISO14443-4 cards using D-Logic NFC Readers and FREE software with SDK

The default port is The command line usage for the APDU tool is:. See the -p option. Displays online documentation for this command. Suppresses outputting an ATR answer to reset. Specifies an output file. If an output file is not specified with the -o option, output defaults to standard output. For example, serialPort can be COM1. To use this option, the javax.

If you enter the name of a serial port that does not exist on your system, the APDU tool will respond by printing the names of available ports. Allows you to specify the input script or scripts.

Displays descriptive text during operation. The following examples show how to use the APDU tool to direct output to the console or to a file. The following command runs the APDU tool with the file example. Output is sent to the console. The default TCP port is used. Output is written to the file example. C-APDU commands may extend across multiple lines. Redirects APDU activity to the contacted or primary interface. Redirects output to the contactless or secondary interface.

Pauses execution of the script for the number of milliseconds specified by Integer. Echoes the quoted string to the output file. The leading and trailing quote characters are removed. Sends a powerdown command to the reader in the active interface. Sends a powerup command to the reader in the active interface.

A powerup command must be sent to the reader prior to executing any APDU on the selected interface.


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