go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions. Once this CL is submitted, and post-submit testing succeeds on all first-class ports across all supported Go versions, this repository will be tagged with its next minor version. Change-Id: Ic017d7ac9986ab17999bbf9a9528e5671946e57a Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/460501 Reviewed-by: Heschi Kreinick <heschi@google.com> Run-TryBot: Gopher Robot <gobot@golang.org> Auto-Submit: Gopher Robot <gobot@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2023-01-04 16:08:32 +00:00 · 2022-12-06 15:30:02 +00:00 · 2022-11-30 16:58:33 +00:00 · 2022-11-17 22:06:29 +00:00 · 2022-11-08 20:30:58 +00:00 · 2022-10-27 21:25:27 +00:00
5 changed files with 572 additions and 688 deletions
--- a/go.mod
+++ b/go.mod
@@ -3,9 +3,9 @@ module golang.org/x/oauth2
 go 1.17

 require (
-	cloud.google.com/go/compute v1.7.0
+	cloud.google.com/go/compute/metadata v0.2.0
 	github.com/google/go-cmp v0.5.8
-	golang.org/x/net v0.1.0
+	golang.org/x/net v0.5.0
 	google.golang.org/appengine v1.6.7
 )

--- a/go.sum
+++ b/go.sum
@@ -1,648 +1,46 @@
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-google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
-google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
-google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
-google.golang.org/grpc v1.34.0/go.mod h1:WotjhfgOW/POjDeRt8vscBtXq+2VjORFy659qA51WJ8=
-google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.36.1/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
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-google.golang.org/grpc v1.37.1/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
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-google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
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 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
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 google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
 google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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-honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
--- a/google/internal/externalaccount/aws.go
+++ b/google/internal/externalaccount/aws.go
@@ -62,6 +62,13 @@ const (
 	// The AWS authorization header name for the auto-generated date.
 	awsDateHeader = "x-amz-date"

+	// Supported AWS configuration environment variables.
+	awsAccessKeyId     = "AWS_ACCESS_KEY_ID"
+	awsDefaultRegion   = "AWS_DEFAULT_REGION"
+	awsRegion          = "AWS_REGION"
+	awsSecretAccessKey = "AWS_SECRET_ACCESS_KEY"
+	awsSessionToken    = "AWS_SESSION_TOKEN"
+
 	awsTimeFormatLong  = "20060102T150405Z"
 	awsTimeFormatShort = "20060102"
 )
@@ -267,6 +274,49 @@ type awsRequest struct {
 	Headers []awsRequestHeader `json:"headers"`
 }

+func (cs awsCredentialSource) validateMetadataServers() error {
+	if err := cs.validateMetadataServer(cs.RegionURL, "region_url"); err != nil {
+		return err
+	}
+	if err := cs.validateMetadataServer(cs.CredVerificationURL, "url"); err != nil {
+		return err
+	}
+	return cs.validateMetadataServer(cs.IMDSv2SessionTokenURL, "imdsv2_session_token_url")
+}
+
+var validHostnames []string = []string{"169.254.169.254", "fd00:ec2::254"}
+
+func (cs awsCredentialSource) isValidMetadataServer(metadataUrl string) bool {
+	if metadataUrl == "" {
+		// Zero value means use default, which is valid.
+		return true
+	}
+
+	u, err := url.Parse(metadataUrl)
+	if err != nil {
+		// Unparseable URL means invalid
+		return false
+	}
+
+	for _, validHostname := range validHostnames {
+		if u.Hostname() == validHostname {
+			// If it's one of the valid hostnames, everything is good
+			return true
+		}
+	}
+
+	// hostname not found in our allowlist, so not valid
+	return false
+}
+
+func (cs awsCredentialSource) validateMetadataServer(metadataUrl, urlName string) error {
+	if !cs.isValidMetadataServer(metadataUrl) {
+		return fmt.Errorf("oauth2/google: invalid hostname %s for %s", metadataUrl, urlName)
+	}
+
+	return nil
+}
+
 func (cs awsCredentialSource) doRequest(req *http.Request) (*http.Response, error) {
 	if cs.client == nil {
 		cs.client = oauth2.NewClient(cs.ctx, nil)
@@ -274,17 +324,34 @@ func (cs awsCredentialSource) doRequest(req *http.Request) (*http.Response, erro
 	return cs.client.Do(req.WithContext(cs.ctx))
 }

+func canRetrieveRegionFromEnvironment() bool {
+	// The AWS region can be provided through AWS_REGION or AWS_DEFAULT_REGION. Only one is
+	// required.
+	return getenv(awsRegion) != "" || getenv(awsDefaultRegion) != ""
+}
+
+func canRetrieveSecurityCredentialFromEnvironment() bool {
+	// Check if both AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY are available.
+	return getenv(awsAccessKeyId) != "" && getenv(awsSecretAccessKey) != ""
+}
+
+func shouldUseMetadataServer() bool {
+	return !canRetrieveRegionFromEnvironment() || !canRetrieveSecurityCredentialFromEnvironment()
+}
+
 func (cs awsCredentialSource) subjectToken() (string, error) {
 	if cs.requestSigner == nil {
+		headers := make(map[string]string)
+		if shouldUseMetadataServer() {
 			awsSessionToken, err := cs.getAWSSessionToken()
 			if err != nil {
 				return "", err
 			}

-		headers := make(map[string]string)
 			if awsSessionToken != "" {
 				headers[awsIMDSv2SessionTokenHeader] = awsSessionToken
 			}
+		}

 		awsSecurityCredentials, err := cs.getSecurityCredentials(headers)
 		if err != nil {
@@ -389,11 +456,11 @@ func (cs *awsCredentialSource) getAWSSessionToken() (string, error) {
 }

 func (cs *awsCredentialSource) getRegion(headers map[string]string) (string, error) {
-	if envAwsRegion := getenv("AWS_REGION"); envAwsRegion != "" {
+	if canRetrieveRegionFromEnvironment() {
+		if envAwsRegion := getenv(awsRegion); envAwsRegion != "" {
 			return envAwsRegion, nil
 		}
-	if envAwsRegion := getenv("AWS_DEFAULT_REGION"); envAwsRegion != "" {
-		return envAwsRegion, nil
+		return getenv("AWS_DEFAULT_REGION"), nil
 	}

 	if cs.RegionURL == "" {
@@ -434,15 +501,13 @@ func (cs *awsCredentialSource) getRegion(headers map[string]string) (string, err
 }

 func (cs *awsCredentialSource) getSecurityCredentials(headers map[string]string) (result awsSecurityCredentials, err error) {
-	if accessKeyID := getenv("AWS_ACCESS_KEY_ID"); accessKeyID != "" {
-		if secretAccessKey := getenv("AWS_SECRET_ACCESS_KEY"); secretAccessKey != "" {
+	if canRetrieveSecurityCredentialFromEnvironment() {
 		return awsSecurityCredentials{
-				AccessKeyID:     accessKeyID,
-				SecretAccessKey: secretAccessKey,
-				SecurityToken:   getenv("AWS_SESSION_TOKEN"),
+			AccessKeyID:     getenv(awsAccessKeyId),
+			SecretAccessKey: getenv(awsSecretAccessKey),
+			SecurityToken:   getenv(awsSessionToken),
 		}, nil
 	}
-	}

 	roleName, err := cs.getMetadataRoleName(headers)
 	if err != nil {
--- a/google/internal/externalaccount/aws_test.go
+++ b/google/internal/externalaccount/aws_test.go
@@ -474,6 +474,38 @@ func createDefaultAwsTestServer() *testAwsServer {
 	)
 }

+func createDefaultAwsTestServerWithImdsv2(t *testing.T) *testAwsServer {
+	validateSessionTokenHeaders := func(r *http.Request) {
+		if r.URL.Path == "/latest/api/token" {
+			headerValue := r.Header.Get(awsIMDSv2SessionTtlHeader)
+			if headerValue != awsIMDSv2SessionTtl {
+				t.Errorf("%q = \n%q\n want \n%q", awsIMDSv2SessionTtlHeader, headerValue, awsIMDSv2SessionTtl)
+			}
+		} else {
+			headerValue := r.Header.Get(awsIMDSv2SessionTokenHeader)
+			if headerValue != "sessiontoken" {
+				t.Errorf("%q = \n%q\n want \n%q", awsIMDSv2SessionTokenHeader, headerValue, "sessiontoken")
+			}
+		}
+	}
+
+	return createAwsTestServer(
+		"/latest/meta-data/iam/security-credentials",
+		"/latest/meta-data/placement/availability-zone",
+		"https://sts.{region}.amazonaws.com?Action=GetCallerIdentity&Version=2011-06-15",
+		"/latest/api/token",
+		"gcp-aws-role",
+		"us-east-2b",
+		map[string]string{
+			"SecretAccessKey": secretAccessKey,
+			"AccessKeyId":     accessKeyID,
+			"Token":           securityToken,
+		},
+		"sessiontoken",
+		validateSessionTokenHeaders,
+	)
+}
+
 func (server *testAwsServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	switch p := r.URL.Path; p {
 	case server.url:
@@ -553,16 +585,25 @@ func getExpectedSubjectToken(url, region, accessKeyID, secretAccessKey, security
 func TestAWSCredential_BasicRequest(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
-	getenv = setEnvironment(map[string]string{})
 	oldNow := now
-	defer func() { now = oldNow }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
+	getenv = setEnvironment(map[string]string{})
 	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -588,46 +629,27 @@ func TestAWSCredential_BasicRequest(t *testing.T) {
 }

 func TestAWSCredential_IMDSv2(t *testing.T) {
-	validateSessionTokenHeaders := func(r *http.Request) {
-		if r.URL.Path == "/latest/api/token" {
-			headerValue := r.Header.Get(awsIMDSv2SessionTtlHeader)
-			if headerValue != awsIMDSv2SessionTtl {
-				t.Errorf("%q = \n%q\n want \n%q", awsIMDSv2SessionTtlHeader, headerValue, awsIMDSv2SessionTtl)
-			}
-		} else {
-			headerValue := r.Header.Get(awsIMDSv2SessionTokenHeader)
-			if headerValue != "sessiontoken" {
-				t.Errorf("%q = \n%q\n want \n%q", awsIMDSv2SessionTokenHeader, headerValue, "sessiontoken")
-			}
-		}
-	}
-
-	server := createAwsTestServer(
-		"/latest/meta-data/iam/security-credentials",
-		"/latest/meta-data/placement/availability-zone",
-		"https://sts.{region}.amazonaws.com?Action=GetCallerIdentity&Version=2011-06-15",
-		"/latest/api/token",
-		"gcp-aws-role",
-		"us-east-2b",
-		map[string]string{
-			"SecretAccessKey": secretAccessKey,
-			"AccessKeyId":     accessKeyID,
-			"Token":           securityToken,
-		},
-		"sessiontoken",
-		validateSessionTokenHeaders,
-	)
+	server := createDefaultAwsTestServerWithImdsv2(t)
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
-	getenv = setEnvironment(map[string]string{})
 	oldNow := now
-	defer func() { now = oldNow }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
+	getenv = setEnvironment(map[string]string{})
 	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -655,17 +677,26 @@ func TestAWSCredential_IMDSv2(t *testing.T) {
 func TestAWSCredential_BasicRequestWithoutSecurityToken(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
 	delete(server.Credentials, "Token")

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
-	getenv = setEnvironment(map[string]string{})
 	oldNow := now
-	defer func() { now = oldNow }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
+	getenv = setEnvironment(map[string]string{})
 	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -693,20 +724,29 @@ func TestAWSCredential_BasicRequestWithoutSecurityToken(t *testing.T) {
 func TestAWSCredential_BasicRequestWithEnv(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldNow := now
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{
 		"AWS_ACCESS_KEY_ID":     "AKIDEXAMPLE",
 		"AWS_SECRET_ACCESS_KEY": "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
 		"AWS_REGION":            "us-west-1",
 	})
-	oldNow := now
-	defer func() { now = oldNow }()
 	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -734,20 +774,29 @@ func TestAWSCredential_BasicRequestWithEnv(t *testing.T) {
 func TestAWSCredential_BasicRequestWithDefaultEnv(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldNow := now
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{
 		"AWS_ACCESS_KEY_ID":     "AKIDEXAMPLE",
 		"AWS_SECRET_ACCESS_KEY": "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
-		"AWS_DEFAULT_REGION":    "us-west-1",
+		"AWS_REGION":            "us-west-1",
 	})
-	oldNow := now
-	defer func() { now = oldNow }()
 	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -774,21 +823,30 @@ func TestAWSCredential_BasicRequestWithDefaultEnv(t *testing.T) {
 func TestAWSCredential_BasicRequestWithTwoRegions(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldNow := now
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{
 		"AWS_ACCESS_KEY_ID":     "AKIDEXAMPLE",
 		"AWS_SECRET_ACCESS_KEY": "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
 		"AWS_REGION":            "us-west-1",
 		"AWS_DEFAULT_REGION":    "us-east-1",
 	})
-	oldNow := now
-	defer func() { now = oldNow }()
 	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -815,16 +873,25 @@ func TestAWSCredential_BasicRequestWithTwoRegions(t *testing.T) {
 func TestAWSCredential_RequestWithBadVersion(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)
 	tfc.CredentialSource.EnvironmentID = "aws3"

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{})
+	validHostnames = []string{tsURL.Hostname()}

-	_, err := tfc.parse(context.Background())
+	_, err = tfc.parse(context.Background())
 	if err == nil {
 		t.Fatalf("parse() should have failed")
 	}
@@ -836,14 +903,23 @@ func TestAWSCredential_RequestWithBadVersion(t *testing.T) {
 func TestAWSCredential_RequestWithNoRegionURL(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)
 	tfc.CredentialSource.RegionURL = ""

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{})
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -863,14 +939,23 @@ func TestAWSCredential_RequestWithNoRegionURL(t *testing.T) {
 func TestAWSCredential_RequestWithBadRegionURL(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
 	server.WriteRegion = notFound

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{})
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -890,6 +975,10 @@ func TestAWSCredential_RequestWithBadRegionURL(t *testing.T) {
 func TestAWSCredential_RequestWithMissingCredential(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
 	server.WriteSecurityCredentials = func(w http.ResponseWriter, r *http.Request) {
 		w.Write([]byte("{}"))
 	}
@@ -898,8 +987,13 @@ func TestAWSCredential_RequestWithMissingCredential(t *testing.T) {
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{})
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -919,6 +1013,10 @@ func TestAWSCredential_RequestWithMissingCredential(t *testing.T) {
 func TestAWSCredential_RequestWithIncompleteCredential(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
 	server.WriteSecurityCredentials = func(w http.ResponseWriter, r *http.Request) {
 		w.Write([]byte(`{"AccessKeyId":"FOOBARBAS"}`))
 	}
@@ -927,8 +1025,13 @@ func TestAWSCredential_RequestWithIncompleteCredential(t *testing.T) {
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{})
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -948,14 +1051,23 @@ func TestAWSCredential_RequestWithIncompleteCredential(t *testing.T) {
 func TestAWSCredential_RequestWithNoCredentialURL(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)
 	tfc.CredentialSource.URL = ""

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{})
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -975,14 +1087,23 @@ func TestAWSCredential_RequestWithNoCredentialURL(t *testing.T) {
 func TestAWSCredential_RequestWithBadCredentialURL(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
 	server.WriteRolename = notFound

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{})
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -1002,14 +1123,23 @@ func TestAWSCredential_RequestWithBadCredentialURL(t *testing.T) {
 func TestAWSCredential_RequestWithBadFinalCredentialURL(t *testing.T) {
 	server := createDefaultAwsTestServer()
 	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
 	server.WriteSecurityCredentials = notFound

 	tfc := testFileConfig
 	tfc.CredentialSource = server.getCredentialSource(ts.URL)

 	oldGetenv := getenv
-	defer func() { getenv = oldGetenv }()
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		validHostnames = oldValidHostnames
+	}()
 	getenv = setEnvironment(map[string]string{})
+	validHostnames = []string{tsURL.Hostname()}

 	base, err := tfc.parse(context.Background())
 	if err != nil {
@@ -1025,3 +1155,290 @@ func TestAWSCredential_RequestWithBadFinalCredentialURL(t *testing.T) {
 		t.Errorf("subjectToken = %q, want %q", got, want)
 	}
 }
+
+func TestAWSCredential_ShouldNotCallMetadataEndpointWhenCredsAreInEnv(t *testing.T) {
+	server := createDefaultAwsTestServer()
+	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
+
+	metadataTs := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		t.Error("Metadata server should not have been called.")
+	}))
+
+	tfc := testFileConfig
+	tfc.CredentialSource = server.getCredentialSource(ts.URL)
+	tfc.CredentialSource.IMDSv2SessionTokenURL = metadataTs.URL
+
+	oldGetenv := getenv
+	oldNow := now
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
+	getenv = setEnvironment(map[string]string{
+		"AWS_ACCESS_KEY_ID":     "AKIDEXAMPLE",
+		"AWS_SECRET_ACCESS_KEY": "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
+		"AWS_REGION":            "us-west-1",
+	})
+	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}
+
+	base, err := tfc.parse(context.Background())
+	if err != nil {
+		t.Fatalf("parse() failed %v", err)
+	}
+
+	out, err := base.subjectToken()
+	if err != nil {
+		t.Fatalf("retrieveSubjectToken() failed: %v", err)
+	}
+
+	expected := getExpectedSubjectToken(
+		"https://sts.us-west-1.amazonaws.com?Action=GetCallerIdentity&Version=2011-06-15",
+		"us-west-1",
+		"AKIDEXAMPLE",
+		"wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
+		"",
+	)
+
+	if got, want := out, expected; !reflect.DeepEqual(got, want) {
+		t.Errorf("subjectToken = \n%q\n want \n%q", got, want)
+	}
+}
+
+func TestAWSCredential_ShouldCallMetadataEndpointWhenNoRegion(t *testing.T) {
+	server := createDefaultAwsTestServerWithImdsv2(t)
+	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
+
+	tfc := testFileConfig
+	tfc.CredentialSource = server.getCredentialSource(ts.URL)
+
+	oldGetenv := getenv
+	oldNow := now
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
+	getenv = setEnvironment(map[string]string{
+		"AWS_ACCESS_KEY_ID":     accessKeyID,
+		"AWS_SECRET_ACCESS_KEY": secretAccessKey,
+	})
+	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}
+
+	base, err := tfc.parse(context.Background())
+	if err != nil {
+		t.Fatalf("parse() failed %v", err)
+	}
+
+	out, err := base.subjectToken()
+	if err != nil {
+		t.Fatalf("retrieveSubjectToken() failed: %v", err)
+	}
+
+	expected := getExpectedSubjectToken(
+		"https://sts.us-east-2.amazonaws.com?Action=GetCallerIdentity&Version=2011-06-15",
+		"us-east-2",
+		accessKeyID,
+		secretAccessKey,
+		"",
+	)
+
+	if got, want := out, expected; !reflect.DeepEqual(got, want) {
+		t.Errorf("subjectToken = \n%q\n want \n%q", got, want)
+	}
+}
+
+func TestAWSCredential_ShouldCallMetadataEndpointWhenNoAccessKey(t *testing.T) {
+	server := createDefaultAwsTestServerWithImdsv2(t)
+	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
+
+	tfc := testFileConfig
+	tfc.CredentialSource = server.getCredentialSource(ts.URL)
+
+	oldGetenv := getenv
+	oldNow := now
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
+	getenv = setEnvironment(map[string]string{
+		"AWS_SECRET_ACCESS_KEY": "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
+		"AWS_REGION":            "us-west-1",
+	})
+	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}
+
+	base, err := tfc.parse(context.Background())
+	if err != nil {
+		t.Fatalf("parse() failed %v", err)
+	}
+
+	out, err := base.subjectToken()
+	if err != nil {
+		t.Fatalf("retrieveSubjectToken() failed: %v", err)
+	}
+
+	expected := getExpectedSubjectToken(
+		"https://sts.us-west-1.amazonaws.com?Action=GetCallerIdentity&Version=2011-06-15",
+		"us-west-1",
+		accessKeyID,
+		secretAccessKey,
+		securityToken,
+	)
+
+	if got, want := out, expected; !reflect.DeepEqual(got, want) {
+		t.Errorf("subjectToken = \n%q\n want \n%q", got, want)
+	}
+}
+
+func TestAWSCredential_ShouldCallMetadataEndpointWhenNoSecretAccessKey(t *testing.T) {
+	server := createDefaultAwsTestServerWithImdsv2(t)
+	ts := httptest.NewServer(server)
+	tsURL, err := neturl.Parse(ts.URL)
+	if err != nil {
+		t.Fatalf("couldn't parse httptest servername")
+	}
+
+	tfc := testFileConfig
+	tfc.CredentialSource = server.getCredentialSource(ts.URL)
+
+	oldGetenv := getenv
+	oldNow := now
+	oldValidHostnames := validHostnames
+	defer func() {
+		getenv = oldGetenv
+		now = oldNow
+		validHostnames = oldValidHostnames
+	}()
+	getenv = setEnvironment(map[string]string{
+		"AWS_ACCESS_KEY_ID": "AKIDEXAMPLE",
+		"AWS_REGION":        "us-west-1",
+	})
+	now = setTime(defaultTime)
+	validHostnames = []string{tsURL.Hostname()}
+
+	base, err := tfc.parse(context.Background())
+	if err != nil {
+		t.Fatalf("parse() failed %v", err)
+	}
+
+	out, err := base.subjectToken()
+	if err != nil {
+		t.Fatalf("retrieveSubjectToken() failed: %v", err)
+	}
+
+	expected := getExpectedSubjectToken(
+		"https://sts.us-west-1.amazonaws.com?Action=GetCallerIdentity&Version=2011-06-15",
+		"us-west-1",
+		accessKeyID,
+		secretAccessKey,
+		securityToken,
+	)
+
+	if got, want := out, expected; !reflect.DeepEqual(got, want) {
+		t.Errorf("subjectToken = \n%q\n want \n%q", got, want)
+	}
+}
+
+func TestAWSCredential_Validations(t *testing.T) {
+	var metadataServerValidityTests = []struct {
+		name       string
+		credSource CredentialSource
+		errText    string
+	}{
+		{
+			name: "No Metadata Server URLs",
+			credSource: CredentialSource{
+				EnvironmentID:         "aws1",
+				RegionURL:             "",
+				URL:                   "",
+				IMDSv2SessionTokenURL: "",
+			},
+		}, {
+			name: "IPv4 Metadata Server URLs",
+			credSource: CredentialSource{
+				EnvironmentID:         "aws1",
+				RegionURL:             "http://169.254.169.254/latest/meta-data/placement/availability-zone",
+				URL:                   "http://169.254.169.254/latest/meta-data/iam/security-credentials",
+				IMDSv2SessionTokenURL: "http://169.254.169.254/latest/api/token",
+			},
+		}, {
+			name: "IPv6 Metadata Server URLs",
+			credSource: CredentialSource{
+				EnvironmentID:         "aws1",
+				RegionURL:             "http://[fd00:ec2::254]/latest/meta-data/placement/availability-zone",
+				URL:                   "http://[fd00:ec2::254]/latest/meta-data/iam/security-credentials",
+				IMDSv2SessionTokenURL: "http://[fd00:ec2::254]/latest/api/token",
+			},
+		}, {
+			name: "Faulty RegionURL",
+			credSource: CredentialSource{
+				EnvironmentID:         "aws1",
+				RegionURL:             "http://abc.com/latest/meta-data/placement/availability-zone",
+				URL:                   "http://169.254.169.254/latest/meta-data/iam/security-credentials",
+				IMDSv2SessionTokenURL: "http://169.254.169.254/latest/api/token",
+			},
+			errText: "oauth2/google: invalid hostname http://abc.com/latest/meta-data/placement/availability-zone for region_url",
+		}, {
+			name: "Faulty CredVerificationURL",
+			credSource: CredentialSource{
+				EnvironmentID:         "aws1",
+				RegionURL:             "http://169.254.169.254/latest/meta-data/placement/availability-zone",
+				URL:                   "http://abc.com/latest/meta-data/iam/security-credentials",
+				IMDSv2SessionTokenURL: "http://169.254.169.254/latest/api/token",
+			},
+			errText: "oauth2/google: invalid hostname http://abc.com/latest/meta-data/iam/security-credentials for url",
+		}, {
+			name: "Faulty IMDSv2SessionTokenURL",
+			credSource: CredentialSource{
+				EnvironmentID:         "aws1",
+				RegionURL:             "http://169.254.169.254/latest/meta-data/placement/availability-zone",
+				URL:                   "http://169.254.169.254/latest/meta-data/iam/security-credentials",
+				IMDSv2SessionTokenURL: "http://abc.com/latest/api/token",
+			},
+			errText: "oauth2/google: invalid hostname http://abc.com/latest/api/token for imdsv2_session_token_url",
+		},
+	}
+
+	for _, tt := range metadataServerValidityTests {
+		t.Run(tt.name, func(t *testing.T) {
+			tfc := testFileConfig
+			tfc.CredentialSource = tt.credSource
+
+			oldGetenv := getenv
+			defer func() { getenv = oldGetenv }()
+			getenv = setEnvironment(map[string]string{})
+
+			_, err := tfc.parse(context.Background())
+			if err != nil {
+				if tt.errText == "" {
+					t.Errorf("Didn't expect an error, but got %v", err)
+				} else if tt.errText != err.Error() {
+					t.Errorf("Expected %v, but got %v", tt.errText, err)
+				}
+			} else {
+				if tt.errText != "" {
+					t.Errorf("Expected error %v, but got none", tt.errText)
+				}
+			}
+		})
+	}
+}
--- a/google/internal/externalaccount/basecredentials.go
+++ b/google/internal/externalaccount/basecredentials.go
@@ -213,6 +213,10 @@ func (c *Config) parse(ctx context.Context) (baseCredentialSource, error) {
 				awsCredSource.IMDSv2SessionTokenURL = c.CredentialSource.IMDSv2SessionTokenURL
 			}

+			if err := awsCredSource.validateMetadataServers(); err != nil {
+				return nil, err
+			}
+
 			return awsCredSource, nil
 		}
 	} else if c.CredentialSource.File != "" {
Author	SHA1	Message	Date
Gopher Robot	34ffb07a99	go.mod: update golang.org/x dependencies Update golang.org/x dependencies to their latest tagged versions. Once this CL is submitted, and post-submit testing succeeds on all first-class ports across all supported Go versions, this repository will be tagged with its next minor version. Change-Id: Ic017d7ac9986ab17999bbf9a9528e5671946e57a Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/460501 Reviewed-by: Heschi Kreinick <heschi@google.com> Run-TryBot: Gopher Robot <gobot@golang.org> Auto-Submit: Gopher Robot <gobot@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>	2023-01-04 16:08:32 +00:00
Gopher Robot	b177c21ac9	go.mod: update golang.org/x dependencies Update golang.org/x dependencies to their latest tagged versions. Once this CL is submitted, and post-submit testing succeeds on all first-class ports across all supported Go versions, this repository will be tagged with its next minor version. Change-Id: Iddd5948b1dc74c208372e82df1971f9cd2b5f296 Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/455435 Run-TryBot: Gopher Robot <gobot@golang.org> Auto-Submit: Gopher Robot <gobot@golang.org> Reviewed-by: Heschi Kreinick <heschi@google.com> Reviewed-by: Carlos Amedee <carlos@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org>	2022-12-06 15:30:02 +00:00
aeitzman	510acbce1f	google/internal/externalaccount: Added check for aws region and security credential environment variables before aws metadata call Adds check for aws values in environment variables before the metadata server is called to prevent unnecessary off box calls. See https://github.com/googleapis/google-auth-library-java/pull/1100 for same change in java library. Change-Id: Ie86a899be88c38d3fcbbe377f9bf30a7a66530c0 GitHub-Last-Rev: `bcab69572c` GitHub-Pull-Request: golang/oauth2#612 Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/453715 Reviewed-by: Leo Siracusa <leosiracusa@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Cody Oss <codyoss@google.com> Auto-Submit: Cody Oss <codyoss@google.com> Reviewed-by: Cody Oss <codyoss@google.com>	2022-11-30 16:58:33 +00:00
Ryan Kohler	ec4a9b2ff2	google/internal/externalaccount: Adding metadata verification Change-Id: I4d664862b7b287131c1481b238ebd0875f7c233b GitHub-Last-Rev: `74bcc33f5e` GitHub-Pull-Request: golang/oauth2#608 Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/449975 Run-TryBot: Cody Oss <codyoss@google.com> Auto-Submit: Cody Oss <codyoss@google.com> Reviewed-by: Leo Siracusa <leosiracusa@google.com> Reviewed-by: Cody Oss <codyoss@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>	2022-11-17 22:06:29 +00:00
Gopher Robot	68a41d64f9	go.mod: update golang.org/x dependencies Update golang.org/x dependencies to their latest tagged versions. Once this CL is submitted, and post-submit testing succeeds on all first-class ports across all supported Go versions, this repository will be tagged with its next minor version. Change-Id: I3f0d7b406644af66ea5bef4e6edbe60044b96274 Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/448756 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Jenny Rakoczy <jenny@golang.org> Reviewed-by: Heschi Kreinick <heschi@google.com> Run-TryBot: Gopher Robot <gobot@golang.org> Auto-Submit: Gopher Robot <gobot@golang.org>	2022-11-08 20:30:58 +00:00
Cody Oss	1a77549b81	go.mod: update to new compute/metadata module This newly carved out module has 0 external dependencies which should help simiplify many peoples dep trees. Change-Id: I59fcc8517b92fea0142fdee1be12076c4ece3e61 Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/446075 Auto-Submit: Cody Oss <codyoss@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> Run-TryBot: Cody Oss <codyoss@google.com>	2022-10-27 21:25:27 +00:00