binaryfoo/emv-bertlv：解密用不太基础的“基本编码规则”编码的EMV数据

项目介绍

binaryfoo/emv-bertlv 是一个托管在 GitHub 上的开源项目，主要使用 Kotlin 编写，采用 MIT License 许可证，目前获得 174 个 Star、63 次 Fork。

仓库全名: binaryfoo/emv-bertlv

README 摘要

What is this thing? =================== A library for deciphering BER TLV data used in EMV (chip card transactions). You might be wondering what some of the strange characters on a credit card receipt mean. Or you might be trying to achieve certification with Visa, Mastercard or Amex (perhaps even UnionPay). The tests provide some idea of what kind of data this code can decipher. The EMVCo website has the full…

完整内容见 GitHub 原始 README 或本页。

常见问题

emv-bertlv 用什么语言开发？

主要使用 Kotlin 编写，采用 MIT License 许可证，目前有 174 个 Star。

emv-bertlv 可以免费商用吗？

如何获取 emv-bertlv 的源码？

可以直接克隆仓库：git clone https://github.com/binaryfoo/emv-bertlv.git，默认分支为 master；安装与运行步骤见仓库 README。

emv-bertlv 最近还在维护吗？

仓库最近一次更新为 2024年2月4日，当前有 3 个未关闭 Issue；Star 数为 174，可作为社区活跃度的参考。

关于

GitHub 原始描述（英文）

Deciphering EMV data encoded in the not so basic "basic encoding rules".

emv visa amex mastercard

MIT License
174 Stars
63 Forks
16 Watching

描述取自 GitHub 官方 API，保持仓库作者书写的原文。

简要分析

热度分

316

价值分

124

活跃状态

活跃

GitHub

语言占比

Groovy

Java

Kotlin

贡献者

What is this thing?

A library for deciphering BER TLV data used in EMV (chip card transactions).

You might be wondering what some of the strange characters on a credit card receipt mean. Or you might be trying to achieve certification with Visa, Mastercard or Amex (perhaps even UnionPay).

The tests provide some idea of what kind of data this code can decipher. The EMVCo website has the full (1000+ page) specs. Add to that the Visa, Mastercard and Amex documents.

How might I use it?

In a couple of ways:

As a library in a java (or other JVM language) project doing wonderful things with chip card data.
On the web in a little tool. The code for this tool lives in another repo.
As a command line tool.

From Maven or Gradle

Dependency Information (available from Maven Central):

    <dependency>
        <groupId>io.github.binaryfoo</groupId>
        <artifactId>emv-bertlv</artifactId>
        <version>0.1.8</version>
    </dependency>

To get started decoding call decode() on RootDecoder.

Command Line

The library can be used as an executable jar:

Download the latest jar
Run using java -jar emv-bertlv-x.y.z-shaded.jar

This will dump out some (hopefully) somewhat helpful help output:

Usage Main <decode-type> <value> [<tag-set>]
  <decode-type> is one of
    95: TVR
    9B: TSI
    82: AIP
    8E: CVM List
    9F34: CVM Results
    9F6C: CTQ
    9F66: TTQ
    dol: DOL
    filled-dol: Filled DOL
    constructed: TLV Data
    apdu-sequence: APDUs
    bit-string: Bits
  <value> is the hex string or '-' for standard input
  <tag-set> is one of [EMV, qVSDC, MSD, Amex] defaults to EMV

For example to decode the Terminal Verification Results:

java -jar emv-bertlv-x.y.z-shaded.jar 95 ffffffffff

Or say you have a file containing a set of APDUs encoded as hex strings:

cat apdus.txt | java -jar emv-bertlv-x.y.z-shaded.jar apdu-sequence -

Domain Knowledge

Visa’s chip terms explained document is a good list.

Eftlab’s knowledge base.

Alternative Tools

Eftlab’s BP-Tools

Emvlab’s tlvtool

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emv-bertlv