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Added logout functionality through provider #226

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Added logout functionality through provider #226

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bb21ec6
Added logout functionality through provider
dlouwers-aez Jan 22, 2019
3541c12
Fix for method documentation LogoutURL
dlouwers-aez Jan 22, 2019
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35 changes: 30 additions & 5 deletions oidc.go
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ import (
"io/ioutil"
"mime"
"net/http"
"net/url"
"strings"
"time"

Expand Down Expand Up @@ -69,6 +70,7 @@ type Provider struct {
authURL string
tokenURL string
userInfoURL string
logoutURL string

// Raw claims returned by the server.
rawClaims []byte
Expand All @@ -82,11 +84,12 @@ type cachedKeys struct {
}

type providerJSON struct {
Issuer string `json:"issuer"`
AuthURL string `json:"authorization_endpoint"`
TokenURL string `json:"token_endpoint"`
JWKSURL string `json:"jwks_uri"`
UserInfoURL string `json:"userinfo_endpoint"`
Issuer string `json:"issuer"`
AuthURL string `json:"authorization_endpoint"`
TokenURL string `json:"token_endpoint"`
JWKSURL string `json:"jwks_uri"`
UserInfoURL string `json:"userinfo_endpoint"`
EndSessionURL string `json:"end_session_endpoint"`
}

// NewProvider uses the OpenID Connect discovery mechanism to construct a Provider.
Expand Down Expand Up @@ -128,6 +131,7 @@ func NewProvider(ctx context.Context, issuer string) (*Provider, error) {
authURL: p.AuthURL,
tokenURL: p.TokenURL,
userInfoURL: p.UserInfoURL,
logoutURL: p.EndSessionURL,
rawClaims: body,
remoteKeySet: NewRemoteKeySet(ctx, p.JWKSURL),
}, nil
Expand Down Expand Up @@ -158,6 +162,27 @@ func (p *Provider) Endpoint() oauth2.Endpoint {
return oauth2.Endpoint{AuthURL: p.authURL, TokenURL: p.tokenURL}
}

// LogoutURL returns the logout endpoints for the given provider.
// See: https://openid.net/specs/openid-connect-session-1_0.html#RPLogout
func (p *Provider) LogoutURL(idTokenHint string, redirectURL string, state string) string {
logoutURL, err := url.Parse(p.logoutURL)
if err != nil {
return ""
}
query := logoutURL.Query()
if idTokenHint != "" {
query.Set("id_token_hint", idTokenHint)
}
if redirectURL != "" {
query.Set("post_logout_redirect_uri", redirectURL)
}
if state != "" {
query.Set("state", state)
}
logoutURL.RawQuery = query.Encode()
return logoutURL.String()
}

// UserInfo represents the OpenID Connect userinfo claims.
type UserInfo struct {
Subject string `json:"sub"`
Expand Down