When working on EMV transactions, it’s always interesting to have some APDU examples and dialog sequences. Below is an example of a successful MasterCard PayPass contactless transaction. Don’t bother trying to use the card info, it is dummy info 🙂 PCD identifies the terminal commands, PICC the PayPass card responses : Continue reading
When working on EMV transactions, it’s always interesting to have some APDU examples and dialog sequences. Below is an example of a successful EMV transaction (an Interac Flash purchase). Don’t bother trying to use the card info, it is dummy test info 🙂 PCD identifies the terminal commands, PICC the InteracFlash card responses : Continue reading
When communicating with an EMV chip card, the card may reply to a command with error code SW1 SW2 = ’69 85′. In this post, we’ll analyze why this error code may be returned in response to the VERIFY command.
The VERIFY command “initiates in the ICC the comparison of the Transaction PIN Data sent in the data field of the command with the reference PIN data associated with the application”, as defined in EMV 4.3 book 3, section ‘6.5.12 VERIFY Command-Response APDUs‘. Status word ‘6985’ is defined as “Command not allowed” (“conditions of use not satisfied”), in EMV 4.3 book 3, section ‘6.3.5 Coding of the Status Bytes. This error code may be returned in several situations, here are a few common ones :
When communicating with an EMV chip card, the card may reply to a command with error code SW1 SW2 = ’69 85′. In this post, we’ll analyze why this error code may be returned in response to the GET PROCESSING OPTIONS (GPO) command.
The GPO command “initiates the transaction within the ICC“, as defined in EMV 4.3 book 3, section ‘6.5.8 GET PROCESSING OPTIONS Command-Response APDUs‘. Status word ‘6985’ is defined as “Command not allowed” (“conditions of use not satisfied”), in EMV 4.3 book 3, section ‘6.3.5 Coding of the Status Bytes. This often happens when the GPO command contains an invalid response to the card Processing Data Options List (PDOL). Continue reading