316 lines
8.5 KiB
Go
316 lines
8.5 KiB
Go
package model
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import (
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"database/sql"
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"encoding/base64"
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"encoding/hex"
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"encoding/json"
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"strings"
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"time"
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"github.com/go-webauthn/webauthn/protocol"
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"github.com/go-webauthn/webauthn/webauthn"
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"github.com/google/uuid"
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"gopkg.in/yaml.v3"
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)
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const (
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attestationTypeFIDOU2F = "fido-u2f"
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)
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// WebauthnUser is an object to represent a user for the Webauthn lib.
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type WebauthnUser struct {
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Username string
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DisplayName string
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Devices []WebauthnDevice
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}
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// HasFIDOU2F returns true if the user has any attestation type `fido-u2f` devices.
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func (w WebauthnUser) HasFIDOU2F() bool {
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for _, c := range w.Devices {
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if c.AttestationType == attestationTypeFIDOU2F {
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return true
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}
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}
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return false
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}
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// WebAuthnID implements the webauthn.User interface.
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func (w WebauthnUser) WebAuthnID() []byte {
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return []byte(w.Username)
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}
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// WebAuthnName implements the webauthn.User interface.
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func (w WebauthnUser) WebAuthnName() string {
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return w.Username
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}
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// WebAuthnDisplayName implements the webauthn.User interface.
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func (w WebauthnUser) WebAuthnDisplayName() string {
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return w.DisplayName
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}
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// WebAuthnIcon implements the webauthn.User interface.
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func (w WebauthnUser) WebAuthnIcon() string {
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return ""
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}
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// WebAuthnCredentials implements the webauthn.User interface.
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func (w WebauthnUser) WebAuthnCredentials() (credentials []webauthn.Credential) {
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credentials = make([]webauthn.Credential, len(w.Devices))
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var credential webauthn.Credential
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for i, device := range w.Devices {
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aaguid, err := device.AAGUID.MarshalBinary()
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if err != nil {
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continue
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}
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credential = webauthn.Credential{
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ID: device.KID.Bytes(),
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PublicKey: device.PublicKey,
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AttestationType: device.AttestationType,
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Authenticator: webauthn.Authenticator{
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AAGUID: aaguid,
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SignCount: device.SignCount,
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CloneWarning: device.CloneWarning,
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},
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}
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transports := strings.Split(device.Transport, ",")
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credential.Transport = []protocol.AuthenticatorTransport{}
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for _, t := range transports {
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if t == "" {
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continue
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}
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credential.Transport = append(credential.Transport, protocol.AuthenticatorTransport(t))
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}
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credentials[i] = credential
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}
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return credentials
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}
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// WebAuthnCredentialDescriptors decodes the users credentials into protocol.CredentialDescriptor's.
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func (w WebauthnUser) WebAuthnCredentialDescriptors() (descriptors []protocol.CredentialDescriptor) {
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credentials := w.WebAuthnCredentials()
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descriptors = make([]protocol.CredentialDescriptor, len(credentials))
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for i, credential := range credentials {
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descriptors[i] = credential.Descriptor()
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}
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return descriptors
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}
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// NewWebauthnDeviceFromCredential creates a WebauthnDevice from a webauthn.Credential.
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func NewWebauthnDeviceFromCredential(rpid, username, description string, credential *webauthn.Credential) (device WebauthnDevice) {
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transport := make([]string, len(credential.Transport))
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for i, t := range credential.Transport {
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transport[i] = string(t)
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}
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device = WebauthnDevice{
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RPID: rpid,
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Username: username,
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CreatedAt: time.Now(),
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Description: description,
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KID: NewBase64(credential.ID),
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PublicKey: credential.PublicKey,
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AttestationType: credential.AttestationType,
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SignCount: credential.Authenticator.SignCount,
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CloneWarning: credential.Authenticator.CloneWarning,
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Transport: strings.Join(transport, ","),
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}
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aaguid, err := uuid.Parse(hex.EncodeToString(credential.Authenticator.AAGUID))
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if err == nil && aaguid.ID() != 0 {
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device.AAGUID = uuid.NullUUID{Valid: true, UUID: aaguid}
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}
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return device
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}
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// WebauthnDeviceJSON represents a Webauthn Device in the JSON format.
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type WebauthnDeviceJSON struct {
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ID int `json:"id"`
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CreatedAt time.Time `json:"created_at"`
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LastUsedAt *time.Time `json:"last_used_at,omitempty"`
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RPID string `json:"rpid"`
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Description string `json:"description"`
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KID []byte `json:"kid"`
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PublicKey []byte `json:"public_key"`
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AttestationType string `json:"attestation_type"`
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Transports []string `json:"transports"`
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AAGUID string `json:"aaguid,omitempty"`
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SignCount uint32 `json:"sign_count"`
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CloneWarning bool `json:"clone_warning"`
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}
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// WebauthnDevice represents a Webauthn Device in the database storage.
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type WebauthnDevice struct {
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ID int `db:"id"`
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CreatedAt time.Time `db:"created_at"`
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LastUsedAt sql.NullTime `db:"last_used_at"`
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RPID string `db:"rpid"`
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Username string `db:"username"`
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Description string `db:"description"`
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KID Base64 `db:"kid"`
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PublicKey []byte `db:"public_key"`
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AttestationType string `db:"attestation_type"`
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Transport string `db:"transport"`
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AAGUID uuid.NullUUID `db:"aaguid"`
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SignCount uint32 `db:"sign_count"`
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CloneWarning bool `db:"clone_warning"`
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}
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// MarshalJSON returns the WebauthnDevice in a JSON friendly manner.
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func (w *WebauthnDevice) MarshalJSON() (data []byte, err error) {
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o := WebauthnDeviceJSON{
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ID: w.ID,
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CreatedAt: w.CreatedAt,
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RPID: w.RPID,
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Description: w.Description,
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KID: w.KID.data,
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PublicKey: w.PublicKey,
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AttestationType: w.AttestationType,
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Transports: []string{},
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SignCount: w.SignCount,
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CloneWarning: w.CloneWarning,
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}
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if w.AAGUID.Valid {
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o.AAGUID = w.AAGUID.UUID.String()
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}
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if w.Transport != "" {
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o.Transports = strings.Split(w.Transport, ",")
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}
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if w.LastUsedAt.Valid {
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o.LastUsedAt = &w.LastUsedAt.Time
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}
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return json.Marshal(o)
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}
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// UpdateSignInInfo adjusts the values of the WebauthnDevice after a sign in.
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func (d *WebauthnDevice) UpdateSignInInfo(config *webauthn.Config, now time.Time, signCount uint32) {
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d.LastUsedAt = sql.NullTime{Time: now, Valid: true}
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d.SignCount = signCount
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if d.RPID != "" {
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return
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}
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switch d.AttestationType {
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case attestationTypeFIDOU2F:
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d.RPID = config.RPOrigins[0]
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default:
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d.RPID = config.RPID
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}
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}
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func (d *WebauthnDevice) LastUsed() *time.Time {
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if d.LastUsedAt.Valid {
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return &d.LastUsedAt.Time
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}
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return nil
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}
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// MarshalYAML marshals this model into YAML.
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func (d *WebauthnDevice) MarshalYAML() (any, error) {
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o := WebauthnDeviceData{
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CreatedAt: d.CreatedAt,
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LastUsedAt: d.LastUsed(),
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RPID: d.RPID,
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Username: d.Username,
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Description: d.Description,
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KID: d.KID.String(),
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PublicKey: base64.StdEncoding.EncodeToString(d.PublicKey),
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AttestationType: d.AttestationType,
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Transport: d.Transport,
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AAGUID: d.AAGUID.UUID.String(),
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SignCount: d.SignCount,
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CloneWarning: d.CloneWarning,
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}
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return yaml.Marshal(o)
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}
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// UnmarshalYAML unmarshalls YAML into this model.
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func (d *WebauthnDevice) UnmarshalYAML(value *yaml.Node) (err error) {
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o := &WebauthnDeviceData{}
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if err = value.Decode(o); err != nil {
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return err
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}
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if d.PublicKey, err = base64.StdEncoding.DecodeString(o.PublicKey); err != nil {
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return err
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}
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var aaguid uuid.UUID
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if aaguid, err = uuid.Parse(o.AAGUID); err != nil {
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return err
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}
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if aaguid.ID() != 0 {
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d.AAGUID = uuid.NullUUID{Valid: true, UUID: aaguid}
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}
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var kid []byte
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if kid, err = base64.StdEncoding.DecodeString(o.KID); err != nil {
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return err
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}
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d.KID = NewBase64(kid)
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d.CreatedAt = o.CreatedAt
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d.RPID = o.RPID
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d.Username = o.Username
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d.Description = o.Description
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d.AttestationType = o.AttestationType
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d.Transport = o.Transport
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d.SignCount = o.SignCount
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d.CloneWarning = o.CloneWarning
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if o.LastUsedAt != nil {
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d.LastUsedAt = sql.NullTime{Valid: true, Time: *o.LastUsedAt}
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}
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return nil
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}
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// WebauthnDeviceData represents a Webauthn Device in the database storage.
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type WebauthnDeviceData struct {
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CreatedAt time.Time `yaml:"created_at"`
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LastUsedAt *time.Time `yaml:"last_used_at"`
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RPID string `yaml:"rpid"`
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Username string `yaml:"username"`
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Description string `yaml:"description"`
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KID string `yaml:"kid"`
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PublicKey string `yaml:"public_key"`
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AttestationType string `yaml:"attestation_type"`
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Transport string `yaml:"transport"`
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AAGUID string `yaml:"aaguid"`
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SignCount uint32 `yaml:"sign_count"`
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CloneWarning bool `yaml:"clone_warning"`
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}
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// WebauthnDeviceExport represents a WebauthnDevice export file.
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type WebauthnDeviceExport struct {
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WebauthnDevices []WebauthnDevice `yaml:"webauthn_devices"`
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}
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