emv-tools

emv-tools is a necessary tool when developing a payment terminal.

Parsing R-APDU

Analyze the R-APDU which is the response of the card reader.

Usage

1. Select the R-APDU you want to analyze on the editor.
2. Selection includes Status Word (SW1, SW2).
3. Select Analyze R-APDU from the context menu.
4. Analysis results are displayed in a new tab.

Tag name

The following tags display names.

• Tags as described in EMV 4.4 Book 3 - A2 Data Elements.
• Tags as described in ISO 7816-4, 5.1.5 File control information.

Terminal-specific tags are displayed as unknown template or unknown value.

Private TLV

• You can support card reader specific tags by placing .emv-tags.json in your workspace directory.
• .emv-tags.json is specified by an array of tag_info structures.

tag_info

property	required	type	description
tag	o	string	A hexadecimal string representing the tag (uppercase)
name	o	string	Tag name
template	o	string[]	Tags that can be parents of this tag
length		number	Specify when the meaning changes depending on the length of the value

sample .emv-tags.json

[
  {"tag": "E1", "name": "Card Data", "template": []},
  {"tag": "DFAE05", "name": "KSN", "template": ["E1"]},
  {"tag": "E3", "name": "Track Info", "template": ["E1"]},
  {"tag": "DFDF41", "name": "Track 1 Data", "template": ["E3"]},
  {"tag": "DFDF42", "name": "Track 2 Data", "template": ["E3"]}
]