use go-oidc instead of verifying and extracting tokens ourselves, rename oidc_endpoint to oidc_issuer to be more inline with spec
This commit is contained in:
Raal Goff
parent
0393ab524c
commit
c487591437
4
api.go
4
api.go
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@ -134,7 +134,7 @@ func (h *Headscale) RegistrationHandler(c *gin.Context) {
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Str("machine", m.Name).
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Msg("Not registered and not NodeKey rotation. Sending a authurl to register")
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if h.cfg.OIDCEndpoint != "" {
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if h.cfg.OIDCIssuer != "" {
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resp.AuthURL = fmt.Sprintf("%s/oidc/register/%s", h.cfg.ServerURL, mKey.HexString())
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} else {
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resp.AuthURL = fmt.Sprintf("%s/register?key=%s",
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@ -204,7 +204,7 @@ func (h *Headscale) RegistrationHandler(c *gin.Context) {
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Str("handler", "Registration").
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Str("machine", m.Name).
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Msg("The node is sending us a new NodeKey, sending auth url")
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if h.cfg.OIDCEndpoint != "" {
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if h.cfg.OIDCIssuer != "" {
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resp.AuthURL = fmt.Sprintf("%s/oidc/register/%s", h.cfg.ServerURL, mKey.HexString())
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} else {
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resp.AuthURL = fmt.Sprintf("%s/register?key=%s",
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4
app.go
4
app.go
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@ -46,7 +46,7 @@ type Config struct {
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DNSConfig *tailcfg.DNSConfig
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OIDCEndpoint string
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OIDCIssuer string
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OIDCClientID string
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OIDCClientSecret string
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}
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@ -172,7 +172,7 @@ func (h *Headscale) Serve() error {
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r.GET("/register", h.RegisterWebAPI)
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r.POST("/machine/:id/map", h.PollNetMapHandler)
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r.POST("/machine/:id", h.RegistrationHandler)
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r.GET("/oidc/register/:mKey", h.RegisterOIDC)
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r.GET("/oidc/register/:mkey", h.RegisterOIDC)
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r.GET("/oidc/callback", h.OIDCCallback)
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r.GET("/apple", h.AppleMobileConfig)
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r.GET("/apple/:platform", h.ApplePlatformConfig)
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@ -171,7 +171,7 @@ func getHeadscaleApp() (*headscale.Headscale, error) {
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DNSConfig: GetDNSConfig(),
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OIDCEndpoint: viper.GetString("oidc_endpoint"),
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OIDCIssuer: viper.GetString("oidc_issuer"),
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OIDCClientID: viper.GetString("oidc_client_id"),
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OIDCClientSecret: viper.GetString("oidc_client_secret"),
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}
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7
go.mod
7
go.mod
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@ -7,11 +7,12 @@ require (
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github.com/Microsoft/go-winio v0.5.0 // indirect
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github.com/cenkalti/backoff/v4 v4.1.1 // indirect
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github.com/containerd/continuity v0.1.0 // indirect
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github.com/coreos/go-oidc/v3 v3.1.0
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github.com/docker/cli v20.10.8+incompatible // indirect
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github.com/docker/docker v20.10.8+incompatible // indirect
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github.com/efekarakus/termcolor v1.0.1
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github.com/gin-gonic/gin v1.7.4
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github.com/gofrs/uuid v4.0.0+incompatible // indirect
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github.com/gofrs/uuid v4.0.0+incompatible
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github.com/google/go-github v17.0.0+incompatible // indirect
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github.com/google/go-querystring v1.1.0 // indirect
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github.com/hako/durafmt v0.0.0-20210608085754-5c1018a4e16b
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@ -28,13 +29,13 @@ require (
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github.com/spf13/viper v1.8.1
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github.com/stretchr/testify v1.7.0
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github.com/tailscale/hujson v0.0.0-20210818175511-7360507a6e88
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github.com/tcnksm/go-latest v0.0.0-20170313132115-e3007ae9052e // indirect
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github.com/tcnksm/go-latest v0.0.0-20170313132115-e3007ae9052e
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github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
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golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
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golang.org/x/net v0.0.0-20210913180222-943fd674d43e // indirect
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golang.org/x/oauth2 v0.0.0-20210402161424-2e8d93401602
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golang.org/x/sys v0.0.0-20210910150752-751e447fb3d0 // indirect
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gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c
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gopkg.in/square/go-jose.v2 v2.3.1
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gopkg.in/yaml.v2 v2.4.0
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gorm.io/datatypes v1.0.2
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gorm.io/driver/postgres v1.1.1
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8
go.sum
8
go.sum
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@ -143,6 +143,8 @@ github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkE
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github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
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github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
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github.com/coreos/go-iptables v0.6.0/go.mod h1:Qe8Bv2Xik5FyTXwgIbLAnv2sWSBmvWdFETJConOQ//Q=
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github.com/coreos/go-oidc/v3 v3.1.0 h1:6avEvcdvTa1qYsOZ6I5PRkSYHzpTNWgKYmaJfaYbrRw=
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github.com/coreos/go-oidc/v3 v3.1.0/go.mod h1:rEJ/idjfUyfkBit1eI1fvyr+64/g9dcKpAm8MJMesvo=
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github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
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github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
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github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
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@ -1067,6 +1069,7 @@ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLL
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golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/net v0.0.0-20200505041828-1ed23360d12c/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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@ -1101,6 +1104,7 @@ golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5/go.mod h1:KelEdhl1UZF7XfJ
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golang.org/x/oauth2 v0.0.0-20210218202405-ba52d332ba99/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
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golang.org/x/oauth2 v0.0.0-20210220000619-9bb904979d93/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
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golang.org/x/oauth2 v0.0.0-20210313182246-cd4f82c27b84/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
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golang.org/x/oauth2 v0.0.0-20210402161424-2e8d93401602 h1:0Ja1LBD+yisY6RWM/BH7TJVXWsSjs2VwBSmvSX4HdBc=
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golang.org/x/oauth2 v0.0.0-20210402161424-2e8d93401602/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
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golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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@ -1355,6 +1359,7 @@ google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7
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google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
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google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
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google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
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google.golang.org/appengine v1.6.7 h1:FZR1q0exgwxzPzp/aF+VccGrSfxfPpkBqjIIEq3ru6c=
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google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
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google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
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google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
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@ -1452,8 +1457,9 @@ gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
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gopkg.in/ini.v1 v1.62.0 h1:duBzk771uxoUuOlyRLkHsygud9+5lrlGjdFBb4mSKDU=
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gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
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gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
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gopkg.in/square/go-jose.v2 v2.3.1 h1:SK5KegNXmKmqE342YYN2qPHEnUYeoMiXXl1poUlI+o4=
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gopkg.in/square/go-jose.v2 v2.3.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
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gopkg.in/square/go-jose.v2 v2.5.1 h1:7odma5RETjNHWJnR32wx8t+Io4djHE1PqxCFx3iiZ2w=
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gopkg.in/square/go-jose.v2 v2.5.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
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gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
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gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
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gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
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@ -50,6 +50,11 @@ func (m Machine) isAlreadyRegistered() bool {
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return m.Registered
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}
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// isExpired returns whether the machine registration has expired
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func (m Machine) isExpired() bool {
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return time.Now().UTC().After(*m.Expiry)
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}
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// toNode converts a Machine into a Tailscale Node. includeRoutes is false for shared nodes
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// as per the expected behaviour in the official SaaS
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func (m Machine) toNode(includeRoutes bool) (*tailcfg.Node, error) {
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222
oidc.go
222
oidc.go
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@ -1,186 +1,37 @@
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package headscale
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import (
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"context"
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"crypto/rand"
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"encoding/hex"
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"encoding/json"
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"errors"
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"fmt"
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"github.com/coreos/go-oidc/v3/oidc"
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"github.com/gin-gonic/gin"
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"github.com/patrickmn/go-cache"
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"github.com/rs/zerolog/log"
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"github.com/s12v/go-jwks"
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"gopkg.in/square/go-jose.v2/jwt"
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"golang.org/x/oauth2"
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"gorm.io/gorm"
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"io"
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"net/http"
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"net/url"
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"strings"
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"time"
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)
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type OpenIDConfiguration struct {
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Issuer string `json:"issuer"`
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AuthorizationEndpoint string `json:"authorization_endpoint"`
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TokenEndpoint string `json:"token_endpoint"`
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JWKSURI string `json:"jwks_uri"`
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}
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type OpenIDTokens struct {
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AccessToken string `json:"access_token"`
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ExpiresIn int `json:"expires_in"`
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IdToken string `json:"id_token"`
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NotBeforePolicy int `json:"not-before-policy,omitempty"`
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RefreshExpiresIn int `json:"refresh_expires_in"`
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RefreshToken string `json:"refresh_token"`
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Scope string `json:"scope"`
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SessionState string `json:"session_state,omitempty"`
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TokenType string `json:"token_type,omitempty"`
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}
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type AccessToken struct {
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jwt.Claims
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type IDTokenClaims struct {
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Name string `json:"name,omitempty"`
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Groups []string `json:"groups,omitempty"`
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Email string `json:"email"`
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Username string `json:"preferred_username,omitempty"`
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}
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var oidcConfig *OpenIDConfiguration
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var oidcProvider *oidc.Provider
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var oauth2Config *oauth2.Config
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var stateCache *cache.Cache
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var jwksSource *jwks.WebSource
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var jwksClient jwks.JWKSClient
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func verifyToken(token string) (*AccessToken, error) {
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if jwksClient == nil {
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jwksSource = jwks.NewWebSource(oidcConfig.JWKSURI)
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jwksClient = jwks.NewDefaultClient(
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jwksSource,
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time.Hour, // Refresh keys every 1 hour
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12*time.Hour, // Expire keys after 12 hours
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)
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}
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//decode jwt
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tok, err := jwt.ParseSigned(token)
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if err != nil {
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return nil, err
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}
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|
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if tok.Headers[0].KeyID != "" {
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log.Debug().Msgf("Checking KID %s\n", tok.Headers[0].KeyID)
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jwk, err := jwksClient.GetSignatureKey(tok.Headers[0].KeyID)
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if err != nil {
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return nil, err
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}
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claims := AccessToken{}
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err = tok.Claims(jwk.Certificates[0].PublicKey, &claims)
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if err != nil {
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return nil, err
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} else {
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|
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err = claims.Validate(jwt.Expected{
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Time: time.Now(),
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})
|
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if err != nil {
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return nil, err
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}
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return &claims, nil
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}
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|
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} else {
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return nil, errors.New("JWT does not contain a key id")
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}
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}
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func getOIDCConfig(oidcConfigURL string) (*OpenIDConfiguration, error) {
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client := &http.Client{}
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req, err := http.NewRequest("GET", oidcConfigURL, nil)
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if err != nil {
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log.Error().Msgf("%v", err)
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return nil, err
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}
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log.Debug().Msgf("Requesting OIDC Config from %s", oidcConfigURL)
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oidcConfigResp, err := client.Do(req)
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if err != nil {
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log.Error().Msgf("%v", err)
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return nil, err
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}
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defer oidcConfigResp.Body.Close()
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|
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var oidcConfig OpenIDConfiguration
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|
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err = json.NewDecoder(oidcConfigResp.Body).Decode(&oidcConfig)
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if err != nil {
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log.Error().Msgf("%v", err)
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return nil, err
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}
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return &oidcConfig, nil
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}
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func (h *Headscale) exchangeCodeForTokens(code string, redirectURI string) (*OpenIDTokens, error) {
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var err error
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|
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if oidcConfig == nil {
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oidcConfig, err = getOIDCConfig(fmt.Sprintf("%s.well-known/openid-configuration", h.cfg.OIDCEndpoint))
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if err != nil {
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return nil, err
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||||
}
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}
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|
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params := url.Values{}
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params.Add("grant_type", "authorization_code")
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params.Add("code", code)
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params.Add("client_id", h.cfg.OIDCClientID)
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params.Add("client_secret", h.cfg.OIDCClientSecret)
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params.Add("redirect_uri", redirectURI)
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client := &http.Client{}
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req, err := http.NewRequest("POST", oidcConfig.TokenEndpoint, strings.NewReader(params.Encode()))
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req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
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|
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if err != nil {
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log.Error().Msgf("%v", err)
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return nil, err
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||||
}
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||||
|
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tokenResp, err := client.Do(req)
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if err != nil {
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log.Error().Msgf("%v", err)
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return nil, err
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||||
}
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defer tokenResp.Body.Close()
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||||
|
||||
if tokenResp.StatusCode != 200 {
|
||||
b, _ := io.ReadAll(tokenResp.Body)
|
||||
log.Error().Msgf("%s", b)
|
||||
}
|
||||
|
||||
var tokens OpenIDTokens
|
||||
|
||||
err = json.NewDecoder(tokenResp.Body).Decode(&tokens)
|
||||
if err != nil {
|
||||
log.Error().Msgf("%v", err)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
log.Info().Msg("Successfully exchanged code for tokens")
|
||||
|
||||
return &tokens, nil
|
||||
}
|
||||
|
||||
// RegisterOIDC redirects to the OIDC provider for authentication
|
||||
// Puts machine key in cache so the callback can retrieve it using the oidc state param
|
||||
// Listens in /oidc/register/:mKey
|
||||
func (h *Headscale) RegisterOIDC(c *gin.Context) {
|
||||
mKeyStr := c.Param("mKey")
|
||||
mKeyStr := c.Param("mkey")
|
||||
if mKeyStr == "" {
|
||||
c.String(http.StatusBadRequest, "Wrong params")
|
||||
return
|
||||
|
|
@ -189,13 +40,23 @@ func (h *Headscale) RegisterOIDC(c *gin.Context) {
|
|||
var err error
|
||||
|
||||
// grab oidc config if it hasn't been already
|
||||
if oidcConfig == nil {
|
||||
oidcConfig, err = getOIDCConfig(fmt.Sprintf("%s.well-known/openid-configuration", h.cfg.OIDCEndpoint))
|
||||
if oauth2Config == nil {
|
||||
oidcProvider, err = oidc.NewProvider(context.Background(), h.cfg.OIDCIssuer)
|
||||
|
||||
if err != nil {
|
||||
log.Error().Msgf("Could not retrieve OIDC Config: %s", err.Error())
|
||||
c.String(http.StatusInternalServerError, "Could not retrieve OIDC Config")
|
||||
return
|
||||
}
|
||||
|
||||
oauth2Config = &oauth2.Config{
|
||||
ClientID: h.cfg.OIDCClientID,
|
||||
ClientSecret: h.cfg.OIDCClientSecret,
|
||||
Endpoint: oidcProvider.Endpoint(),
|
||||
RedirectURL: fmt.Sprintf("%s/oidc/callback", h.cfg.ServerURL),
|
||||
Scopes: []string{oidc.ScopeOpenID, "profile", "email"},
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
b := make([]byte, 16)
|
||||
|
|
@ -217,21 +78,16 @@ func (h *Headscale) RegisterOIDC(c *gin.Context) {
|
|||
// place the machine key into the state cache, so it can be retrieved later
|
||||
stateCache.Set(stateStr, mKeyStr, time.Minute*5)
|
||||
|
||||
params := url.Values{}
|
||||
params.Add("response_type", "code")
|
||||
params.Add("client_id", h.cfg.OIDCClientID)
|
||||
params.Add("redirect_uri", fmt.Sprintf("%s/oidc/callback", h.cfg.ServerURL))
|
||||
params.Add("scope", "openid")
|
||||
params.Add("state", stateStr)
|
||||
|
||||
authUrl := fmt.Sprintf("%s?%s", oidcConfig.AuthorizationEndpoint, params.Encode())
|
||||
log.Debug().Msg(authUrl)
|
||||
authUrl := oauth2Config.AuthCodeURL(stateStr)
|
||||
log.Debug().Msgf("Redirecting to %s for authentication", authUrl)
|
||||
|
||||
c.Redirect(http.StatusFound, authUrl)
|
||||
}
|
||||
|
||||
// OIDCCallback handles the callback from the OIDC endpoint
|
||||
// Retrieves the mkey from the state cache, if the machine is not registered, presents a confirmation
|
||||
// Retrieves the mkey from the state cache and adds the machine to the users email namespace
|
||||
// TODO: A confirmation page for new machines should be added to avoid phishing vulnerabilities
|
||||
// TODO: Add groups information from OIDC tokens into machine HostInfo
|
||||
// Listens in /oidc/callback
|
||||
func (h *Headscale) OIDCCallback(c *gin.Context) {
|
||||
|
||||
|
|
@ -243,20 +99,36 @@ func (h *Headscale) OIDCCallback(c *gin.Context) {
|
|||
return
|
||||
}
|
||||
|
||||
redirectURI := fmt.Sprintf("%s/oidc/callback", h.cfg.ServerURL)
|
||||
|
||||
tokens, err := h.exchangeCodeForTokens(code, redirectURI)
|
||||
|
||||
oauth2Token, err := oauth2Config.Exchange(context.Background(), code)
|
||||
if err != nil {
|
||||
c.String(http.StatusBadRequest, "Could not exchange code for token")
|
||||
return
|
||||
}
|
||||
|
||||
//verify tokens
|
||||
claims, err := verifyToken(tokens.AccessToken)
|
||||
rawIDToken, rawIDTokenOK := oauth2Token.Extra("id_token").(string)
|
||||
if !rawIDTokenOK {
|
||||
c.String(http.StatusBadRequest, "Could not extract ID Token")
|
||||
return
|
||||
}
|
||||
|
||||
verifier := oidcProvider.Verifier(&oidc.Config{ClientID: h.cfg.OIDCClientID})
|
||||
|
||||
idToken, err := verifier.Verify(context.Background(), rawIDToken)
|
||||
if err != nil {
|
||||
c.String(http.StatusBadRequest, "invalid tokens")
|
||||
c.String(http.StatusBadRequest, "Failed to verify id token: %s", err.Error())
|
||||
return
|
||||
}
|
||||
|
||||
//userInfo, err := oidcProvider.UserInfo(context.Background(), oauth2.StaticTokenSource(oauth2Token))
|
||||
//if err != nil {
|
||||
// c.String(http.StatusBadRequest, "Failed to retrieve userinfo: "+err.Error())
|
||||
// return
|
||||
//}
|
||||
|
||||
// Extract custom claims
|
||||
var claims IDTokenClaims
|
||||
if err = idToken.Claims(&claims); err != nil {
|
||||
c.String(http.StatusBadRequest, "Failed to decode id token claims: "+err.Error())
|
||||
return
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue