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2.5 KiB
Go FIDO U2F Library
This Go package implements the parts of the FIDO U2F specification required on
the server side of an application.
Features
- Native Go implementation
- No dependancies other than the Go standard library
- Token attestation certificate verification
Usage
Please visit http://godoc.org/github.com/tstranex/u2f for the full
documentation.
How to enrol a new token
app_id := "http://localhost"
// Send registration request to the browser.
c, _ := NewChallenge(app_id, []string{app_id})
req, _ := c.RegisterRequest()
// Read response from the browser.
var resp RegisterResponse
reg, err := Register(resp, c, nil)
if err != nil {
// Registration failed.
}
// Store registration in the database.
How to perform an authentication
// Fetch registration and counter from the database.
var reg Registration
var counter uint32
// Send authentication request to the browser.
c, _ := NewChallenge(app_id, []string{app_id})
req, _ := c.SignRequest(reg)
// Read response from the browser.
var resp SignResponse
newCounter, err := reg.Authenticate(resp, c, counter)
if err != nil {
// Authentication failed.
}
// Store updated counter in the database.
Installation
$ go get github.com/tstranex/u2f
Example
See u2fdemo/main.go for an full example server. To run it:
$ go install github.com/tstranex/u2f/u2fdemo
$ ./bin/u2fdemo
Open https://localhost:3483 in Chrome.
Ignore the SSL warning (due to the self-signed certificate for localhost).
You can then test registering and authenticating using your token.
Changelog
-
2016-12-18: The package has been updated to work with the new
U2F Javascript 1.1 API specification. This causes some breaking changes.SignRequest
has been replaced byWebSignRequest
which now includes
multiple registrations. This is useful when the user has multiple devices
registered since you can now authenticate against any of them with a single
request.WebRegisterRequest
has been introduced, which should generally be used
instead of usingRegisterRequest
directly. It includes the list of existing
registrations with the new registration request. If the user's device already
matches one of the existing registrations, it will refuse to re-register.Challenge.RegisterRequest
has been replaced byNewWebRegisterRequest
.
License
The Go FIDO U2F Library is licensed under the MIT License.