94 lines
2.3 KiB
Go
94 lines
2.3 KiB
Go
package auth
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import (
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"context"
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"fmt"
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"ruben/inventory2/internal/domains/authentication"
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"ruben/inventory2/internal/logging"
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"ruben/inventory2/internal/server/cookies"
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"ruben/inventory2/internal/server/response"
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"github.com/gin-gonic/gin"
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)
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type loginSubrouter struct {
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log *logging.Logger
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auth *authentication.Authenticator
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}
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func Routes(
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r *gin.RouterGroup,
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logger *logging.Logger,
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auth *authentication.Authenticator,
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) {
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ls := &loginSubrouter{
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log: logger,
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auth: auth,
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}
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r.GET("/login", response.Handler(ls.loginPage))
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r.GET("/login/callback", response.Handler(ls.loginCallback))
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r.GET("/logout", response.Handler(ls.logoutPage))
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}
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func (s *loginSubrouter) loginPage(c *gin.Context) (response.Response, error) {
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r := c.Request
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ctx := r.Context()
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u, err := NewLoginURL(ctx, s.auth, "/")
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if err != nil {
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return nil, err
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}
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return response.TemporaryRedirect(u), nil
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}
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func NewLoginURL(ctx context.Context, auth *authentication.Authenticator, targetURI string) (string, error) {
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state, err := auth.NewState(ctx, targetURI)
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if err != nil {
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return "", fmt.Errorf("failed to generate random state: %w", err)
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}
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base64EncodedState := fmt.Sprintf("%x", state[:])
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return auth.AuthCodeURL(base64EncodedState), nil
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}
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func (s *loginSubrouter) loginCallback(c *gin.Context) (response.Response, error) {
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r := c.Request
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ctx := r.Context()
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q := r.URL.Query()
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// obtain token and profile
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accessToken, targetURI, expiration, err := s.auth.Exchange(ctx, q.Get("state"), q.Get("code"))
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if err != nil {
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return nil, response.Unauthorized().
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Msg(fmt.Sprintf("Failed to exchange an authorization code for a token")).
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Wrap(err)
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}
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// set access_token cookie and redirect to a reasonable place
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return response.TemporaryRedirect(targetURI).
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Cookie(cookies.AccessToken(accessToken, expiration)), nil
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}
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func (s *loginSubrouter) logoutPage(c *gin.Context) (response.Response, error) {
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r := c.Request
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host := r.Header.Get("X-Forwarded-Host")
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if host == "" {
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host = r.Host
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}
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if ck, err := r.Cookie("access_token"); err == nil && ck != nil {
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if err := s.auth.DeleteOAuthTokens(r.Context(), ck.Value); err != nil {
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s.log.Error("failed to delete auth token", "error", err)
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}
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}
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return response.TemporaryRedirect(s.auth.GetLogoutURL(host).String()).
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Cookie(cookies.Expired("access_token")), nil
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}
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