/
service.go
148 lines (120 loc) · 3.52 KB
/
service.go
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package passkey
import (
"bytes"
"encoding/base64"
"github.com/go-webauthn/webauthn/protocol"
"github.com/go-webauthn/webauthn/webauthn"
"github.com/authgear/authgear-server/pkg/api/model"
)
type Service struct {
Store *Store
ConfigService *ConfigService
}
func (s *Service) PeekAttestationResponse(attestationResponse []byte) (creationOptions *model.WebAuthnCreationOptions, credentialID string, signCount int64, err error) {
parsed, err := protocol.ParseCredentialCreationResponseBody(bytes.NewReader(attestationResponse))
if err != nil {
return
}
challengeString := parsed.Response.CollectedClientData.Challenge
challenge, err := base64.RawURLEncoding.DecodeString(challengeString)
if err != nil {
return
}
session, err := s.Store.PeekSession(challenge)
if err != nil {
return
}
creationOptions = session.CreationOptions
credentialID = parsed.ID
signCount = int64(parsed.Response.AttestationObject.AuthData.Counter)
return
}
func (s *Service) ConsumeAttestationResponse(attestationResponse []byte) (err error) {
parsed, err := protocol.ParseCredentialCreationResponseBody(bytes.NewReader(attestationResponse))
if err != nil {
return
}
challengeString := parsed.Response.CollectedClientData.Challenge
challenge, err := base64.RawURLEncoding.DecodeString(challengeString)
if err != nil {
return
}
_, err = s.Store.ConsumeSession(challenge)
if err != nil {
return
}
return
}
func (s *Service) GetCredentialIDFromAssertionResponse(assertionResponse []byte) (credentialID string, err error) {
parsed, err := protocol.ParseCredentialRequestResponseBody(bytes.NewReader(assertionResponse))
if err != nil {
return
}
challengeString := parsed.Response.CollectedClientData.Challenge
challenge, err := base64.RawURLEncoding.DecodeString(challengeString)
if err != nil {
return
}
_, err = s.Store.PeekSession(challenge)
if err != nil {
return
}
credentialID = parsed.ID
return
}
func (s *Service) PeekAssertionResponse(assertionResponse []byte, attestationResponse []byte) (signCount int64, err error) {
config, err := s.ConfigService.MakeConfig()
if err != nil {
return
}
parsedAssertion, err := protocol.ParseCredentialRequestResponseBody(bytes.NewReader(assertionResponse))
if err != nil {
return
}
challengeString := parsedAssertion.Response.CollectedClientData.Challenge
challenge, err := base64.RawURLEncoding.DecodeString(challengeString)
if err != nil {
return
}
_, err = s.Store.PeekSession(challenge)
if err != nil {
return
}
parsedAttestation, err := protocol.ParseCredentialCreationResponseBody(bytes.NewReader(attestationResponse))
if err != nil {
return
}
credential, err := webauthn.MakeNewCredential(parsedAttestation)
if err != nil {
return
}
err = parsedAssertion.Verify(
challengeString,
config.RPID,
[]string{config.RPOrigin},
"", // We do not support FIDO AppID extension
false, // user verification is preferred so we do not require user verification here.
credential.PublicKey,
)
if err != nil {
return
}
signCount = int64(parsedAssertion.Response.AuthenticatorData.Counter)
return
}
func (s *Service) ConsumeAssertionResponse(assertionResponse []byte) (err error) {
parsed, err := protocol.ParseCredentialRequestResponseBody(bytes.NewReader(assertionResponse))
if err != nil {
return
}
challengeString := parsed.Response.CollectedClientData.Challenge
challenge, err := base64.RawURLEncoding.DecodeString(challengeString)
if err != nil {
return
}
_, err = s.Store.ConsumeSession(challenge)
if err != nil {
return
}
return
}