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17b8fe2409
* fix: resolve insecure OAuth redirect URI registration Reject unsafe redirect URIs during dynamic OAuth client registration so only HTTPS and loopback HTTP callbacks are accepted. This prevents token/code exfiltration through attacker-controlled redirect targets while preserving local native client flows. Co-authored-by: Cursor <cursoragent@cursor.com> * fix: normalize IPv6 loopback hosts in OAuth redirect validation Strip bracketed IPv6 hosts before comparing against LOOPBACK_HOSTS so http://[::1] callbacks are accepted as intended. Co-authored-by: Cursor <cursoragent@cursor.com> --------- Co-authored-by: Cursor <cursoragent@cursor.com>
124 lines
3.9 KiB
Ruby
124 lines
3.9 KiB
Ruby
require "test_helper"
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class OauthRegistrationControllerTest < ActionDispatch::IntegrationTest
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test "registers a public client and returns client_id" do
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post "/register",
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params: {
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client_name: "Claude",
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redirect_uris: [ "https://claude.ai/callback" ],
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grant_types: [ "authorization_code" ],
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response_types: [ "code" ],
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token_endpoint_auth_method: "none"
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}.to_json,
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headers: { "Content-Type" => "application/json" }
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assert_response :created
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json = JSON.parse(response.body)
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assert json["client_id"].present?
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assert_equal "Claude", json["client_name"]
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assert_equal [ "https://claude.ai/callback" ], json["redirect_uris"]
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assert_equal [ "authorization_code" ], json["grant_types"]
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assert_equal "none", json["token_endpoint_auth_method"]
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assert_nil json["client_secret"], "Public client must not return a secret"
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app = Doorkeeper::Application.find_by(uid: json["client_id"])
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assert app.present?, "Application should be persisted"
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assert_not app.confidential?, "Application must be non-confidential (public client)"
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end
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test "returns error for invalid JSON body" do
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post "/register",
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params: "not json",
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headers: { "Content-Type" => "application/json" }
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assert_response :bad_request
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json = JSON.parse(response.body)
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assert_equal "invalid_client_metadata", json["error"]
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end
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test "returns error when redirect_uris is missing" do
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post "/register",
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params: { client_name: "Claude" }.to_json,
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headers: { "Content-Type" => "application/json" }
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assert_response :bad_request
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json = JSON.parse(response.body)
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assert_equal "invalid_client_metadata", json["error"]
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end
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test "returns error when redirect_uris contains only blank values" do
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post "/register",
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params: { client_name: "Claude", redirect_uris: [ "" ] }.to_json,
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headers: { "Content-Type" => "application/json" }
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assert_response :bad_request
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json = JSON.parse(response.body)
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assert_equal "invalid_client_metadata", json["error"]
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end
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test "uses fallback name when client_name is absent" do
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post "/register",
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params: {
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redirect_uris: [ "https://claude.ai/callback" ],
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token_endpoint_auth_method: "none"
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}.to_json,
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headers: { "Content-Type" => "application/json" }
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assert_response :created
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json = JSON.parse(response.body)
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assert_equal "MCP Client", json["client_name"]
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end
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test "rejects non-loopback http redirect uri" do
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post "/register",
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params: {
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client_name: "Claude",
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redirect_uris: [ "http://evil.example/callback" ]
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}.to_json,
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headers: { "Content-Type" => "application/json" }
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assert_response :bad_request
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json = JSON.parse(response.body)
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assert_equal "invalid_client_metadata", json["error"]
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end
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test "allows loopback http redirect uri" do
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post "/register",
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params: {
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client_name: "Claude",
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redirect_uris: [ "http://localhost:3456/callback" ]
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}.to_json,
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headers: { "Content-Type" => "application/json" }
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assert_response :created
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json = JSON.parse(response.body)
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assert_equal [ "http://localhost:3456/callback" ], json["redirect_uris"]
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end
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test "allows ipv6 loopback http redirect uri" do
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post "/register",
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params: {
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client_name: "Claude",
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redirect_uris: [ "http://[::1]:3456/callback" ]
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}.to_json,
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headers: { "Content-Type" => "application/json" }
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assert_response :created
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json = JSON.parse(response.body)
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assert_equal [ "http://[::1]:3456/callback" ], json["redirect_uris"]
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end
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test "rejects custom scheme redirect uri" do
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post "/register",
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params: {
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client_name: "Claude",
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redirect_uris: [ "myapp://callback" ]
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}.to_json,
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headers: { "Content-Type" => "application/json" }
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assert_response :bad_request
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json = JSON.parse(response.body)
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assert_equal "invalid_client_metadata", json["error"]
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end
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end
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