Pour comprendre les mécanismes EMV, il est toujours intéressant d’avoir des exemples d’APDU et de dialogues. Ci-dessous, un exemple d’une transaction EMV réussie (achat sans-contact Interac Flash). Inutile de récupérer les infos de la carte, c’est une carte de test invalide dans le monde réel 🙂 PCD identifie les commandes du terminal, PICC les réponses de la carte InteracFlash :
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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 :