109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
package session
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import (
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"fmt"
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"net/http"
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"time"
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"github.com/dgrijalva/jwt-go"
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"github.com/drone/drone/common"
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"github.com/drone/drone/common/httputil"
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"github.com/drone/drone/settings"
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"github.com/gorilla/securecookie"
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)
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type Session interface {
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GenerateToken(*http.Request, *common.User) (string, error)
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GetLogin(*http.Request) string
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}
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type session struct {
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secret []byte
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expire time.Duration
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}
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func New(s *settings.Session) Session {
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secret := securecookie.GenerateRandomKey(32)
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expire := time.Hour * 72
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return &session{
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secret: secret,
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expire: expire,
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}
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}
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// GenerateToken generates a JWT token for the user session
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// that can be appended to the #access_token segment to
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// facilitate client-based OAuth2.
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func (s *session) GenerateToken(r *http.Request, user *common.User) (string, error) {
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token := jwt.New(jwt.GetSigningMethod("HS256"))
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token.Claims["user_id"] = user.Login
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token.Claims["audience"] = httputil.GetURL(r)
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token.Claims["expires"] = time.Now().UTC().Add(s.expire).Unix()
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return token.SignedString(s.secret)
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}
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// GetLogin gets the currently authenticated user for the
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// http.Request. The user details will be stored as either
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// a simple API token or JWT bearer token.
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func (s *session) GetLogin(r *http.Request) (_ string) {
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token := getToken(r)
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if len(token) == 0 {
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return
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}
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claims := getClaims(token, s.secret)
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if claims == nil || claims["user_id"] == nil {
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return
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}
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userid, ok := claims["user_id"].(string)
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if !ok {
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return
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}
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// tokenid, ok := claims["token_id"].(string)
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// if ok {
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// _, err := datastore.GetToken(c, int64(tokenid))
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// if err != nil {
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// return nil
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// }
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// }
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return userid
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}
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// getToken is a helper function that extracts the token
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// from the http.Request.
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func getToken(r *http.Request) string {
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token := getTokenHeader(r)
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if len(token) == 0 {
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token = getTokenParam(r)
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}
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return token
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}
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// getTokenHeader parses the JWT token value from
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// the http Authorization header.
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func getTokenHeader(r *http.Request) string {
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var tokenstr = r.Header.Get("Authorization")
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fmt.Sscanf(tokenstr, "Bearer %s", &tokenstr)
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return tokenstr
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}
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// getTokenParam parses the JWT token value from
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// the http Request's query parameter.
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func getTokenParam(r *http.Request) string {
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return r.FormValue("access_token")
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}
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// getClaims is a helper function that extracts the token
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// claims from the JWT token string.
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func getClaims(token string, secret []byte) map[string]interface{} {
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t, err := jwt.Parse(token, func(t *jwt.Token) (interface{}, error) {
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return secret, nil
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})
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if err != nil || !t.Valid {
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return nil
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}
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return t.Claims
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}
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