Continue adding to popup flow

cmd/lavender/conf.go

@@ -1,6 +1,9 @@
 package main
 
-import loginServiceManager "github.com/1f349/lavender/issuer"
+import (
+	loginServiceManager "github.com/1f349/lavender/issuer"
+	"github.com/1f349/lavender/utils"
+)
 
 type startUpConfig struct {
 	Listen         string                          `json:"listen"`
@@ -8,4 +11,5 @@ type startUpConfig struct {
 	PrivateKey     string                          `json:"private_key"`
 	Issuer         string                          `json:"issuer"`
 	SsoServices    []loginServiceManager.SsoConfig `json:"sso_services"`
+	AllowedClients []utils.JsonUrl                 `json:"allowed_clients"`
 }

go.mod

@@ -1,19 +1,27 @@
 module github.com/1f349/lavender
 
-go 1.20
+go 1.21.1
 
 require (
+	github.com/1f349/cache v0.0.2
 	github.com/1f349/violet v0.0.10
 	github.com/MrMelon54/exit-reload v0.0.1
 	github.com/MrMelon54/mjwt v0.1.1
-	github.com/go-oauth2/oauth2/v4 v4.5.2
 	github.com/google/subcommands v1.2.0
+	github.com/google/uuid v1.3.1
 	github.com/julienschmidt/httprouter v1.3.0
+	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 )
 
 require (
+	github.com/MrMelon54/rescheduler v0.0.2 // indirect
 	github.com/golang-jwt/jwt/v4 v4.5.0 // indirect
+	github.com/golang/protobuf v1.4.2 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	golang.org/x/net v0.9.0 // indirect
+	google.golang.org/appengine v1.6.6 // indirect
+	google.golang.org/protobuf v1.23.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,25 +1,17 @@
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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 github.com/1f349/violet v0.0.10 h1:2HuQq7SddV60JZ4Xr7DmmhTOPbjiF+1Uqk+d6O1f18U=
 github.com/1f349/violet v0.0.10/go.mod h1:Uzu6I1pLBP5UEzcUCTQBbk/NTfI5TAABSrowa8DSpR0=
 github.com/MrMelon54/exit-reload v0.0.1 h1:sxHa59tNEQMcikwuX2+93lw6Vi1+R7oCRF8a0C3alXc=
 github.com/MrMelon54/exit-reload v0.0.1/go.mod h1:PLiSfmUzwdpTTQP3BBfUPhkqPwaIZjx0DuXBnM76Bug=
 github.com/MrMelon54/mjwt v0.1.1 h1:m+aTpxbhQCrOPKHN170DQMFR5r938LkviU38unob5Jw=
 github.com/MrMelon54/mjwt v0.1.1/go.mod h1:oYrDBWK09Hju98xb+bRQ0wy+RuAzacxYvKYOZchR2Tk=
-github.com/ajg/form v1.5.1/go.mod h1:uL1WgH+h2mgNtvBq0339dVnzXdBETtL2LeUXaIv25UY=
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-github.com/fasthttp-contrib/websocket v0.0.0-20160511215533-1f3b11f56072/go.mod h1:duJ4Jxv5lDcvg4QuQr0oowTf7dz4/CR8NtyCooz9HL8=
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-github.com/go-oauth2/oauth2/v4 v4.5.2 h1:CuZhD3lhGuI6aNLyUbRHXsgG2RwGRBOuCBfd4WQKqBQ=
-github.com/go-oauth2/oauth2/v4 v4.5.2/go.mod h1:wk/2uLImWIa9VVQDgxz99H2GDbhmfi/9/Xr+GvkSUSQ=
-github.com/go-session/session v3.1.2+incompatible/go.mod h1:8B3iivBQjrz/JtC68Np2T1yBBLxTan3mn/3OM0CyRt0=
-github.com/golang-jwt/jwt v3.2.1+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
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@@ -29,125 +21,55 @@ github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:x
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 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
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 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
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 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220227234510-4e6760a101f9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.6.6 h1:lMO5rYAqUxkmaj76jAkRUvt5JZgFymx/+Q5Mzfivuhc=
 google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

issuer/sso.go

@@ -4,17 +4,18 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/1f349/lavender/utils"
 	"golang.org/x/oauth2"
 	"net/http"
 	"net/url"
-	"path"
 	"slices"
+	"strings"
 )
 
 // SsoConfig is the base URL for an OAUTH/OPENID/SSO login service
 // The path `/.well-known/openid-configuration` should be available
 type SsoConfig struct {
-	Addr      string `json:"addr"`      // https://login.example.com
+	Addr      utils.JsonUrl `json:"addr"`      // https://login.example.com
 	Namespace string        `json:"namespace"` // example.com
 	Client    struct {
 		ID     string   `json:"id"`
@@ -24,8 +25,15 @@ type SsoConfig struct {
 }
 
 func (s SsoConfig) FetchConfig() (*WellKnownOIDC, error) {
-	confUrl := path.Join(s.Addr, ".well-known", "openid-configuration")
+	// generate openid config url
-	get, err := http.Get(confUrl)
+	u := s.Addr.String()
+	if !strings.HasSuffix(u, "/") {
+		u += "/"
+	}
+	u += ".well-known/openid-configuration"
+
+	// fetch metadata
+	get, err := http.Get(u)
 	if err != nil {
 		return nil, err
 	}
@@ -94,3 +102,7 @@ func (o WellKnownOIDC) Oauth2Config() oauth2.Config {
 		Scopes: o.Config.Client.Scopes,
 	}
 }
+
+func (o WellKnownOIDC) ValidReturnUrl(u *url.URL) bool {
+	o.Config.Addr
+}

server/flow.go

@@ -7,12 +7,17 @@ import (
 	"html/template"
 	"log"
 	"net/http"
+	"net/url"
+	"regexp"
+	"time"
 )
 
 var (
 	//go:embed flow-popup.go.html
 	flowPopupHtml     string
 	flowPopupTemplate *template.Template
+
+	isValidState = regexp.MustCompile("^[a-z.]+%[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$")
 )
 
 func init() {
@@ -33,28 +38,59 @@ func (h *HttpServer) flowPopup(rw http.ResponseWriter, req *http.Request, _ http
 	}
 }
 
-func (h *HttpServer) flowPopupPost(rw http.ResponseWriter, req *http.Request, params httprouter.Params) {
+func (h *HttpServer) flowPopupPost(rw http.ResponseWriter, req *http.Request, _ httprouter.Params) {
 	login := h.manager.FindServiceFromLogin(req.PostFormValue("username"))
 	if login == nil {
 		http.Error(rw, "No login service defined for this username", http.StatusBadRequest)
 		return
 	}
 
-	// TODO: save state in sync.Map for quick lookup later
+	returnUrl, err := url.Parse(req.PostFormValue("return"))
-	state := login.Config.Namespace + "%" + uuid.NewString()
+	if err != nil {
+		http.Error(rw, "Invalid return URL", http.StatusBadRequest)
+		return
+	}
+	if !login.ValidReturnUrl(returnUrl) {
+		http.Error(rw, "Invalid return URL for this application", http.StatusBadRequest)
+		return
+	}
 
+	// save state for use later
+	state := login.Config.Namespace + "%" + uuid.NewString()
+	h.flowState.Set(state, flowStateData{
+		login,
+		returnUrl,
+	}, time.Now().Add(15*time.Minute))
+
+	// generate oauth2 config and redirect to authorize URL
 	oa2conf := login.Oauth2Config()
 	oa2conf.RedirectURL = h.baseUrl + "/callback"
 	nextUrl := oa2conf.AuthCodeURL(state)
 	http.Redirect(rw, req, nextUrl, http.StatusFound)
 }
 
-func (h *HttpServer) flowCallback(rw http.ResponseWriter, req *http.Request, params httprouter.Params) {
+func (h *HttpServer) flowCallback(rw http.ResponseWriter, req *http.Request, _ httprouter.Params) {
 	err := req.ParseForm()
 	if err != nil {
 		http.Error(rw, "Error parsing form", http.StatusBadRequest)
 		return
 	}
 
-	// TODO: process flow callback, parse incoming state
+	q := req.URL.Query()
+	state := q.Get("state")
+	if !isValidState.MatchString(state) {
+		http.Error(rw, "Invalid state", http.StatusBadRequest)
+		return
+	}
+	if !h.manager.CheckIssuer(state) {
+		http.Error(rw, "Invalid state", http.StatusBadRequest)
+		return
+	}
+	v, found := h.flowState.Get(state)
+	if !found {
+		http.Error(rw, "Invalid state", http.StatusBadRequest)
+		return
+	}
+
+	// TODO: process flow callback
 }

server/server.go

@@ -2,10 +2,12 @@ package server
 
 import (
 	"fmt"
+	"github.com/1f349/cache"
 	"github.com/1f349/lavender/issuer"
 	"github.com/MrMelon54/mjwt"
 	"github.com/julienschmidt/httprouter"
 	"net/http"
+	"net/url"
 	"time"
 )
 
@@ -14,6 +16,12 @@ type HttpServer struct {
 	baseUrl   string
 	manager   *issuer.Manager
 	signer    mjwt.Signer
+	flowState *cache.Cache[string, flowStateData]
+}
+
+type flowStateData struct {
+	sso       *issuer.WellKnownOIDC
+	returnUrl *url.URL
 }
 
 func NewHttpServer(listen, baseUrl string, manager *issuer.Manager, signer mjwt.Signer) *http.Server {

utils/json-url.go

@@ -0,0 +1,21 @@
+package utils
+
+import (
+	"encoding"
+	"net/url"
+)
+
+type JsonUrl struct {
+	*url.URL
+}
+
+var _ encoding.TextUnmarshaler = &JsonUrl{}
+
+func (s *JsonUrl) UnmarshalText(text []byte) error {
+	parse, err := url.Parse(string(text))
+	if err != nil {
+		return err
+	}
+	s.URL = parse
+	return nil
+}