74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
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package jwt
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import (
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"time"
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jwt "github.com/dgrijalva/jwt-go"
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"github.com/mainflux/mainflux/manager"
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)
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const (
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issuer string = "mainflux"
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duration time.Duration = 10 * time.Hour
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)
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var _ manager.IdentityProvider = (*jwtIdentityProvider)(nil)
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type jwtIdentityProvider struct {
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secret string
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}
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// NewIdentityProvider instantiates a JWT identity provider.
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func NewIdentityProvider(secret string) manager.IdentityProvider {
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return &jwtIdentityProvider{}
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}
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func (idp *jwtIdentityProvider) TemporaryKey(id string) (string, error) {
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now := time.Now().UTC()
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exp := now.Add(duration)
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claims := jwt.StandardClaims{
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Subject: id,
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Issuer: issuer,
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IssuedAt: now.Unix(),
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ExpiresAt: exp.Unix(),
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}
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return idp.jwt(claims)
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}
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func (idp *jwtIdentityProvider) PermanentKey(id string) (string, error) {
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claims := jwt.StandardClaims{
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Subject: id,
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Issuer: issuer,
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IssuedAt: time.Now().UTC().Unix(),
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}
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return idp.jwt(claims)
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}
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func (idp *jwtIdentityProvider) jwt(claims jwt.StandardClaims) (string, error) {
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString([]byte(idp.secret))
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}
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func (idp *jwtIdentityProvider) Identity(key string) (string, error) {
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token, err := jwt.Parse(key, func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, manager.ErrUnauthorizedAccess
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}
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return []byte(idp.secret), nil
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})
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if err != nil {
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return "", manager.ErrUnauthorizedAccess
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}
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if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
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return claims["sub"].(string), nil
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}
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return "", manager.ErrUnauthorizedAccess
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}
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