djpbessems/ContainerImage.Pinniped
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Remove the --use-pkce flag and just always use it.

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Based on the spec, it seems like it's required that OAuth2 servers which do not support PKCE should just ignore the parameters, so this should always work.

Signed-off-by: Matt Moyer <moyerm@vmware.com>
This commit is contained in:
Matt Moyer 2020-10-06 16:10:20 -05:00
parent a13d7ec5a1
commit ce49d8bd7b
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GPG Key ID: EAE88AD172C5AE2D
2 changed files with 22 additions and 19 deletions
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12
cmd/pinniped/cmd/login_oidc.go
View File

@ -31,7 +31,6 @@ type oidcLoginParams struct {
listenPort uint16
scopes []string
skipBrowser bool
usePKCE bool
// These parameters capture dependencies that we want to mock during testing.
generateState func() (state.State, error)
@ -52,7 +51,6 @@ func (o *oidcLoginParams) cmd() *cobra.Command {
cmd.Flags().Uint16Var(&o.listenPort, "listen-port", 48095, "TCP port for localhost listener (authorization code flow only).")
cmd.Flags().StringSliceVar(&o.scopes, "scopes", []string{"offline_access", "openid", "email", "profile"}, "OIDC scopes to request during login.")
cmd.Flags().BoolVar(&o.skipBrowser, "skip-browser", false, "Skip opening the browser (just print the URL).")
cmd.Flags().BoolVar(&o.usePKCE, "use-pkce", true, "Use Proof Key for Code Exchange (RFC 7636) during login.")
mustMarkRequired(&cmd, "issuer", "client-id")
return &cmd
}
@ -77,14 +75,16 @@ func (o *oidcLoginParams) runE(cmd *cobra.Command, args []string) error {
return fmt.Errorf("could not generate OIDC state parameter: %w", err)
}
var pkceCode pkce.Code
if o.usePKCE {
pkceCode, err = o.generatePKCE()
// We can always use PKCE (RFC 7636) because the server should always ignore the parameters if it doesn't
// understand them. Per https://tools.ietf.org/html/rfc7636#section-5:
// As the OAuth 2.0 [RFC6749] server responses are unchanged by this specification, client implementations of
// this specification do not need to know if the server has implemented this specification or not and SHOULD
// send the additional parameters as defined in Section 4 to all servers.
pkceCode, err := o.generatePKCE()
if err != nil {
return fmt.Errorf("could not generate OIDC PKCE parameter: %w", err)
}
authCodeOptions = append(authCodeOptions, pkceCode.Challenge(), pkceCode.Method())
}
// If --skip-browser was passed, override the default browser open function with a Printf() call.
openURL := o.openURL

13
cmd/pinniped/cmd/login_oidc_test.go
View File

@ -46,7 +46,6 @@ func TestLoginOIDCCommand(t *testing.T) {
--listen-port uint16 TCP port for localhost listener (authorization code flow only). (default 48095)
--scopes strings OIDC scopes to request during login. (default [offline_access,openid,email,profile])
--skip-browser Skip opening the browser (just print the URL).
--use-pkce Use Proof Key for Code Exchange (RFC 7636) during login. (default true)
`),
},
{
@ -142,7 +141,6 @@ func TestOIDCLoginRunE(t *testing.T) {
params: oidcLoginParams{
issuer: validServer.URL,
generateState: func() (state.State, error) { return "test-state", nil },
usePKCE: true,
generatePKCE: func() (pkce.Code, error) { return "", fmt.Errorf("some error generating a PKCE code") },
},
wantError: "could not generate OIDC PKCE parameter: some error generating a PKCE code",
@ -152,19 +150,18 @@ func TestOIDCLoginRunE(t *testing.T) {
params: oidcLoginParams{
issuer: validServer.URL,
generateState: func() (state.State, error) { return "test-state", nil },
usePKCE: true,
generatePKCE: func() (pkce.Code, error) { return "test-pkce", nil },
openURL: func(_ string) error { return fmt.Errorf("some browser open error") },
},
wantError: "could not open browser (run again with --skip-browser?): some browser open error",
},
{
name: "success without PKCE",
name: "success",
params: oidcLoginParams{
issuer: validServer.URL,
clientID: "test-client-id",
generateState: func() (state.State, error) { return "test-state", nil },
usePKCE: false,
generatePKCE: func() (pkce.Code, error) { return "test-pkce", nil },
listenPort: 12345,
skipBrowser: true,
},
@ -172,12 +169,18 @@ func TestOIDCLoginRunE(t *testing.T) {
require.Equal(t, validServerURL.Host, actual.Host)
require.Equal(t, "/auth", actual.Path)
require.Equal(t, "", actual.Fragment)
require.Equal(t, url.Values{
"access_type": []string{"offline"},
"client_id": []string{"test-client-id"},
"redirect_uri": []string{"http://localhost:12345/callback"},
"response_type": []string{"code"},
"state": []string{"test-state"},
"code_challenge_method": []string{"S256"},
// This is the PKCE challenge which is calculated as base64(sha256("test-pkce")). For example:
// $ echo -n test-pkce | shasum -a 256 | cut -d" " -f1 | xxd -r -p | base64 | cut -d"=" -f1
// VVaezYqum7reIhoavCHD1n2d+piN3r/mywoYj7fCR7g
"code_challenge": []string{"VVaezYqum7reIhoavCHD1n2d-piN3r_mywoYj7fCR7g"},
}, actual.Query())
},
wantStderr: "Please log in: <URL>\n",