EMV | A collection of tools to use with EMV cards | Ecommerce library

by compr00t Python Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | EMV Summary

EMV is a Python library typically used in Web Site, Ecommerce applications. EMV has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. However EMV build file is not available. You can download it from GitHub.

A collection of tools to use with EMV cards

Support

Quality

Security

License

Reuse

Support

EMV has a low active ecosystem.

It has 1 star(s) with 0 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

EMV has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of EMV is current.

Quality

EMV has 0 bugs and 0 code smells.

Security

EMV has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

EMV code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

EMV is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

EMV releases are not available. You will need to build from source code and install.

EMV has no build file. You will be need to create the build yourself to build the component from source.

Installation instructions are not available. Examples and code snippets are available.

It has 81 lines of code, 0 functions and 2 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of EMV

Get all kandi verified functions for this library.

EMV Key Features

No Key Features are available at this moment for EMV.

EMV Examples and Code Snippets

No Code Snippets are available at this moment for EMV.

Community Discussions

Trending Discussions on EMV

Is it possible to get ISO9796-2 signature with Trailer = 'BC' in Javacard?

What is the meaning of a DIR File and what is exactly a DDF In EMV ICC file structure?

To what level of the EMV stack does the Android NFC API provide?

How to write a matlab code for a given algorithm from a given array and function?

props showing error to read in child component

What is Contact Mode Supported from EMV Tag 9F6E in EMV Contactless Book C4

awaiting a httpsCallable when calling it in the frontend doesn't seem to work

Grab value from xml

Python 2.7 to EXE - can't install pyinstaller

EMV choose crypto method between SDA/DDA/CDA

QUESTION

Is it possible to get ISO9796-2 signature with Trailer = 'BC' in Javacard?

Asked 2022-Feb-24 at 10:46

I trying to get the RSA signature as described in Annex A2.1 of EMV book 2. As I understand it was described in ISO9796-2 as scheme 1, option 1. So, the resulting signature should contain a Header equal to '6A' and a Trailer equal to 'BC'.

The algorithms ALG_RSA_SHA_ISO9796 and ALG_RSA_SHA_ISO9796_MR are the only suitable that I could find. But they acting like scheme 1, option 2 with a Trailer equal to '33cc'

Is it possible to get a signature with Trailer = 'BC'?

Javacard example code:

...

ANSWER

Answered 2022-Feb-24 at 10:46

You can generate such signature using Cipher.ALG_RSA_NOPAD in decrypt mode.

Pseudocode:

Source https://stackoverflow.com/questions/71243483

QUESTION

What is the meaning of a DIR File and what is exactly a DDF In EMV ICC file structure?

Asked 2022-Jan-27 at 19:49

I have been recently struggling to understand the meaning of a DIR file in Emv book 1. I dig a lit bit and I find that my perspective of a folder got me to the wrong path. For me a 'Directory' is equal to a 'folder' that contains only other elements. So when I was going through Emv specifications they said after selecting a DDF or an ADF it sends back the FCI. So I was confused as I was seeing DDF and ADF just as folders so where they store FCI's data . I get more confused when I read "Directories are optional within an ICC".

Can someone please explain to me what is a Directory in ICC and what is the difference between a DDF and its related DIR A that exists in all examples of the section : "Annex C Examples of Directory Structures" of emv book 1 Thank you.

emv specifications

...

ANSWER

Answered 2022-Jan-27 at 13:41

Can someone please explain to me what is a Directory in ICC.

EMV card file structure is based on ISO/IEC 7816-4. You better read it first. There you can find detailed description of many terms you are talking about. Generally, there are two types of card files: DF (dedicated file) and EF (elementary file). EF cantains binary data. DF can contain any file. Every file (both DF and EF) can be selected with APDU SELECT. Every selected file can send as a response FCI structure -- data with general information about this file (type, size, attributes and so on).

what is the difference between a DDF and its related DIR

EMV book 1: "The DIR file is an AEF (in other words, an EF) with a record structure according to this specification including the following data objects according to ISO/IEC 7816-4. ..."

DDF and ADF are subtypes of DF. An ADF is the entry point to one or more Application Elementary Files (AEFs). A DDF is an entry point to other ADFs or DDFs.

Source https://stackoverflow.com/questions/70841478

QUESTION

To what level of the EMV stack does the Android NFC API provide?

Asked 2022-Jan-26 at 17:30

I've been trying to learn about EMV by implementing the contactless protocol on Android. I have read the level 1 (physical layer) EMV Contactless specification and was expecting to need to implement most of it, however the data given by the android NFC API was not what I was expecting.

What layers of the EMV Contactless protocol does the Android NFC API implement? And where should I look within the EMV specification for the next level to implement?

Many thanks

...

ANSWER

Answered 2022-Jan-26 at 17:30

For the normal Android developer it implements ISO/IEC 7816-4 (NFC Forum Type 4) with Host Card Emulation which EMV Contactless also use.

So you can implement an AID's (Application ID's). Different AID's are used by different EMV providers.

But I'm sure more is done in the secure element which only Google wallet can access.

Source https://stackoverflow.com/questions/70866639

QUESTION

How to write a matlab code for a given algorithm from a given array and function?

Asked 2021-Dec-09 at 03:20

I would like to write a matlab code to calculate the value of a function of two variables g(i,j) = i + j + 1 for every pair (i,j) in the set MV = {(1,3), (2,4), (5,6), (5,4), (7,2)} so that the output results in g = {5, 7, 12, 10, 9} based on the following algorithm:

...

ANSWER

Answered 2021-Dec-09 at 03:20

I guess u need the following:

Source https://stackoverflow.com/questions/70283542

QUESTION

props showing error to read in child component

Asked 2021-Nov-19 at 06:58

Hi I am new to react and I am passing a variable to a child component in react like this:

...

ANSWER

Answered 2021-Nov-19 at 06:58

You can guard against null and undefined object accesses using null-checks/guard-clauses or using the Optional Chaining operator if your browser version supports it.

null-check/guard-clause

Source https://stackoverflow.com/questions/70030395

QUESTION

What is Contact Mode Supported from EMV Tag 9F6E in EMV Contactless Book C4

Asked 2021-Oct-06 at 08:27

EMV Tag 9F6E refers to Enhanced Contactless Reader Capabilities. The description for byte 1 bit 8 is listed in the EMV doc as "Contact Mode Supported". What does this mean? Why is something related to contact in the contactless book? Is this a proprietary feature related to AMEX?

...

ANSWER

Answered 2021-Oct-06 at 08:27

Amex Expresspay Tag 0x9F6E, Byte 1 bit 8 "Contact Mode Supported" capability, when card reach the risks, allow card to continue transaction requesting to use contact Chip or reject Contactless transaction when this bit disabled.

Please look to EMVCo Contactless Specifications for Payment Systems, Book C-4, Kernel 4 used by Amex Expresspay.

Source https://stackoverflow.com/questions/69047931

QUESTION

awaiting a httpsCallable when calling it in the frontend doesn't seem to work

Asked 2021-Jul-07 at 05:29

I am using cloud functions and I have httpsCallable that adds a message to a firestore database which am awaiting when calling it in the frontend. The problem is that when I do this, the result gets resolved way later after the function where it's been defined is called. Am not sure if this is an async/await problem or a cloud function httpsCallable's problem. Thanks in advance

Here's the code in the backend:

...

ANSWER

Answered 2021-Jul-07 at 05:29

You should await the parent functions as well because they are async (or returning promises) else the function will continue working on part 8 without awaiting part 6,7.

Source https://stackoverflow.com/questions/68207701

QUESTION

Grab value from xml

Asked 2021-Jun-26 at 23:43

I need to start with saying I'm totally new to writing code. I have been trying to grab information from a xml-file, unsuccessfully I might add. A smal snippet from the xml file is as follows:

...

ANSWER

Answered 2021-Jun-26 at 21:23

Firstly we need to fix the XML provided as an example:

Source https://stackoverflow.com/questions/68146101

QUESTION

Python 2.7 to EXE - can't install pyinstaller

Asked 2021-May-03 at 14:26

I'm using Win10 and have some code written in Python 2.7 (have to be, it's not mine) and I want to create an EXE file. I want to install pyinstaller but can't do it. I've already tried to update the pip version, the suteuptools, to install "ez_setup" to download the file from the pyinstaller website but it doesn't help.

These are the ways I tried to download it:

...

ANSWER

Answered 2021-May-03 at 14:26

The changelog for PyInstaller documents that Python 2.7 has been dropped so you will have to install an older version that has compatibility with 2.7.

Try to install an older version using pip install pyinstaller==3.6.

You will likely have to do similar for other third-party modules that you require.

Source https://stackoverflow.com/questions/67370529

QUESTION

EMV choose crypto method between SDA/DDA/CDA

Asked 2021-Apr-22 at 06:16

I'm a newbie in emv world.

I'm trying to follow this flow:

I'm in the third step. I have to manage the Offline Data Authentication.

How can I negotiate the correct way (SDA, DDA or CDA) with the ICC to perform offline auth?

...

ANSWER

Answered 2021-Apr-22 at 06:16

I got it. You have to the AIP field as follows:

To retrieve the AIP, according to "EMV Book 3 - Application Specification", use te Tag 0x80 Format 1 reply for GET PROCESSING OPTIONS contained:

x82: Application Interchange Profile (AIP),

x94: Application File Locator (AFL).

Source https://stackoverflow.com/questions/67196783

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install EMV

You can download it from GitHub.
You can use EMV like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

Find more information at: