feat: Support for ID token validation

integration/helper.rb

@@ -0,0 +1,31 @@
+# Copyright 2020 Google LLC
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require "minitest/autorun"
+require "minitest/focus"
+require "googleauth"

integration/id_tokens/key_source_test.rb

@@ -0,0 +1,74 @@
+# Copyright 2020 Google LLC
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require "helper"
+
+describe Google::Auth::IDTokens do
+  describe "key source" do
+    let(:legacy_oidc_key_source) {
+      Google::Auth::IDTokens::X509CertHttpKeySource.new "https://www.googleapis.com/oauth2/v1/certs"
+    }
+    let(:oidc_key_source) { Google::Auth::IDTokens.oidc_key_source }
+    let(:iap_key_source) { Google::Auth::IDTokens.iap_key_source }
+
+    it "Gets real keys from the OAuth2 V1 cert URL" do
+      keys = legacy_oidc_key_source.refresh_keys
+      refute_empty keys
+      keys.each do |key|
+        assert_kind_of OpenSSL::PKey::RSA, key.key
+        refute key.key.private?
+        assert_equal "RS256", key.algorithm
+      end
+    end
+
+    it "Gets real keys from the OAuth2 V3 cert URL" do
+      keys = oidc_key_source.refresh_keys
+      refute_empty keys
+      keys.each do |key|
+        assert_kind_of OpenSSL::PKey::RSA, key.key
+        refute key.key.private?
+        assert_equal "RS256", key.algorithm
+      end
+    end
+
+    it "Gets the same keys from the OAuth2 V1 and V3 cert URLs" do
+      keys_v1 = legacy_oidc_key_source.refresh_keys.map(&:key).map(&:export).sort
+      keys_v3 = oidc_key_source.refresh_keys.map(&:key).map(&:export).sort
+      assert_equal keys_v1, keys_v3
+    end
+
+    it "Gets real keys from the IAP public key URL" do
+      keys = iap_key_source.refresh_keys
+      refute_empty keys
+      keys.each do |key|
+        assert_kind_of OpenSSL::PKey::EC, key.key
+        assert_equal "ES256", key.algorithm
+      end
+    end
+  end
+end