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