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go-card's Introduction

This repository is currently not maintained

Go Smart Card API

High level API for smart card integration written in pure Go. On Linx and other Unix-like systems, this package talks directly to the PCSC-Lite daemon, and on Windows it accesses the smart card service via winscard.dll.

Note: macOS isn't and won't be supported, because its modified PCSC-Lite variant can't be accessed without cgo. PCSC-Lite will most likely be (already is?) deprecated in favour of CryptoTokenKit.

Prerequisites

Linux

Install the PCSC-Lite daemon and CCID driver.

Ubuntu:

sudo apt-get install pcscd libccid

Arch Linux:

sudo pacman -S pcsclite ccid
sudo systemctl enable pcscd

Windows

None

Usage

import (
    "fmt"
    "github.com/sf1/go-card/smartcard"
)

ctx, err := smartcard.EstablishContext()
// handle error, if any
defer ctx.Release()

reader, err := ctx.WaitForCardPresent()
// handle error, if any

card, err := reader.Connect()
// handle error, if any
defer card.Disconnect()

fmt.Printf("Card ATR: %s\n", card.ATR()) 
command := SelectCommand(0xa0, 0x00, 0x00, 0x00, 0x62, 0x03, 0x01, 0xc, 0x01, 0x01)
response, err := card.TransmitAPDU(command)
// handle error, if any
fmt.Printf("Response: %s\n", response)

License

MIT. See LICENSE

go-card's People

Contributors

elmostafaidrassi avatar sf1 avatar

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go-card's Issues

context for WaitForCardPresent

Hello, Sebastian!
Thank you very much for the package!
Could you please add context to WaitForCardPresent method.

I expect something like this:
`
func (ctx *Context) WaitForCardPresent(pctx context.Context) (*Reader, error) {
var reader *Reader
for reader == nil {
select {
case <-pctx.Done():
return nil, pctx.Err()
default:
}

`

i need insert card event

for check insert new card i wrote this code but cpu usage is 33% in windows
`

func main() {
ctx, _ := smartcard.EstablishContext()

defer ctx.Release()
messages := make(chan *smartcard.Card)
// var mutex = &sync.Mutex{}

go func() {
	// handle error, if any
	for {
		reader, _ := ctx.WaitForCardPresent()

		// handle error, if any

		// card, err := reader.Connect()
		// handle error, if any
		card, _ := reader.Connect()
		fmt.Printf("Card ATR: %s\n", card.ATR())

		messages <- card

		// handle error, if any
	}

}()

for i := range messages {
	v := string(i.ATR())
	log.Println(v)

}
fmt.Scanln()

}
`

Merge with ebfe/scard?

There is a lot of overlap between this project and https://github.com/ebfe/scard.

I am currently using ebfe/scard because I need GetStatusChange, but this project has some nice things too, like the ISO Command APDU factory functions, the Reader struct with IsCardPresent() and WaitForCardPresent().

How do you feel about merging those features into ebfe/scard?

See also: ebfe/scard#14

Not compatible with OS X

I really like the idea of not having to rely on cgo.
Unfortunately, there is currently no socket provided by the securityd (which implements pcsc-lite on a mac). The connection to net.Dial("unix","/var/run/pcscd/pcscd.comm") fails.

Any idea who we could resolve this?

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