diff --git a/.github/workflows/iam-integrations.yaml b/.github/workflows/iam-integrations.yaml
index 59dfd24fd..846a2b8f7 100644
--- a/.github/workflows/iam-integrations.yaml
+++ b/.github/workflows/iam-integrations.yaml
@@ -1,4 +1,4 @@
-name: IAM integration with external systems
+name: IAM integration
 
 on:
   pull_request:
@@ -12,75 +12,8 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  ldap-test:
-    name: LDAP Tests with Go ${{ matrix.go-version }}
-    runs-on: ubuntu-latest
-
-    services:
-      openldap:
-        image: quay.io/minio/openldap
-        ports:
-          - "389:389"
-          - "636:636"
-        env:
-          LDAP_ORGANIZATION: "MinIO Inc"
-          LDAP_DOMAIN: "min.io"
-          LDAP_ADMIN_PASSWORD: "admin"
-
-    strategy:
-      matrix:
-        go-version: [1.16.x, 1.17.x]
-
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-go@v2
-        with:
-          go-version: ${{ matrix.go-version }}
-      - name: Test LDAP
-        env:
-          LDAP_TEST_SERVER: "localhost:389"
-        run: |
-          sudo sysctl net.ipv6.conf.all.disable_ipv6=0
-          sudo sysctl net.ipv6.conf.default.disable_ipv6=0
-          make test-iam
-
-  etcd-test:
-    name: Etcd Backend Tests with Go ${{ matrix.go-version }}
-    runs-on: ubuntu-latest
-
-    services:
-      etcd:
-        image: "quay.io/coreos/etcd:v3.5.1"
-        env:
-          ETCD_LISTEN_CLIENT_URLS: "http://0.0.0.0:2379"
-          ETCD_ADVERTISE_CLIENT_URLS: "http://0.0.0.0:2379"
-        ports:
-          - "2379:2379"
-        options: >-
-          --health-cmd "etcdctl endpoint health"
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
-
-    strategy:
-      matrix:
-        go-version: [1.16.x, 1.17.x]
-
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-go@v2
-        with:
-          go-version: ${{ matrix.go-version }}
-      - name: Test Etcd IAM backend
-        env:
-          ETCD_SERVER: "http://localhost:2379"
-        run: |
-          sudo sysctl net.ipv6.conf.all.disable_ipv6=0
-          sudo sysctl net.ipv6.conf.default.disable_ipv6=0
-          make test-iam
-
-  iam-etcd-test:
-    name: Etcd Backend + LDAP Tests with Go ${{ matrix.go-version }}
+  iam-matrix-test:
+    name: "[Go=${{ matrix.go-version }}|ldap=${{ matrix.ldap }}|etcd=${{ matrix.etcd }}|openid=${{ matrix.openid }}]"
     runs-on: ubuntu-latest
 
     services:
@@ -105,20 +38,41 @@ jobs:
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
+      openid:
+        image: quay.io/minio/dex
+        ports:
+          - "5556:5556"
+        env:
+          DEX_LDAP_SERVER: "openldap:389"
 
     strategy:
+      # When ldap, etcd or openid vars are empty below, those external servers
+      # are turned off - i.e. if ldap="", then ldap server is not enabled for
+      # the tests.
       matrix:
         go-version: [1.16.x, 1.17.x]
+        ldap: ["", "localhost:389"]
+        etcd: ["", "http://localhost:2379"]
+        openid: ["", "http://127.0.0.1:5556/dex"]
+        exclude:
+          # exclude combos where all are empty.
+          - ldap: ""
+            etcd: ""
+            openid: ""
+          # exclude combos where both ldap and openid IDPs are specified.
+          - ldap: "localhost:389"
+            openid: "http://127.0.0.1:5556/dex"
 
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go-version }}
-      - name: Test Etcd IAM backend with LDAP IDP
+      - name: Test LDAP/OpenID with Etcd combo
         env:
-          ETCD_SERVER: "http://localhost:2379"
-          LDAP_TEST_SERVER: "localhost:389"
+          LDAP_TEST_SERVER: ${{ matrix.ldap }}
+          ETCD_SERVER: ${{ matrix.etcd }}
+          OPENID_TEST_SERVER: ${{ matrix.openid }}
         run: |
           sudo sysctl net.ipv6.conf.all.disable_ipv6=0
           sudo sysctl net.ipv6.conf.default.disable_ipv6=0
diff --git a/cmd/sts-handlers_test.go b/cmd/sts-handlers_test.go
index 2b5db81eb..492cf259c 100644
--- a/cmd/sts-handlers_test.go
+++ b/cmd/sts-handlers_test.go
@@ -20,13 +20,18 @@ package cmd
 import (
 	"context"
 	"fmt"
+	"net/http"
+	"net/url"
 	"os"
 	"strings"
 	"testing"
+	"time"
 
+	"github.com/coreos/go-oidc"
 	"github.com/minio/madmin-go"
 	minio "github.com/minio/minio-go/v7"
 	cr "github.com/minio/minio-go/v7/pkg/credentials"
+	"golang.org/x/oauth2"
 )
 
 func runAllIAMSTSTests(suite *TestSuiteIAM, c *check) {
@@ -235,7 +240,7 @@ func (s *TestSuiteIAM) TestLDAPSTS(c *check) {
 		c.Fatalf("bucket create error: %v", err)
 	}
 
-	// Create policy, user and associate policy
+	// Create policy
 	policy := "mypolicy"
 	policyBytes := []byte(fmt.Sprintf(`{
  "Version": "2012-10-17",
@@ -267,7 +272,7 @@ func (s *TestSuiteIAM) TestLDAPSTS(c *check) {
 
 	_, err = ldapID.Retrieve()
 	if err == nil {
-		c.Fatalf("Expected to fail to create a user with no associated policy!")
+		c.Fatalf("Expected to fail to create STS cred with no associated policy!")
 	}
 
 	userDN := "uid=dillon,ou=people,ou=swengg,dc=min,dc=io"
@@ -338,3 +343,276 @@ func (s *TestSuiteIAM) TestLDAPSTS(c *check) {
 	err = minioClient.RemoveObject(ctx, bucket, "someobject", minio.RemoveObjectOptions{})
 	c.Assert(err.Error(), "Access Denied.")
 }
+
+func (s *TestSuiteIAM) TestOpenIDSTS(c *check) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	bucket := getRandomBucketName()
+	err := s.client.MakeBucket(ctx, bucket, minio.MakeBucketOptions{})
+	if err != nil {
+		c.Fatalf("bucket create error: %v", err)
+	}
+
+	// Generate web identity STS token by interacting with OpenID IDP.
+	token, err := mockTestUserInteraction(ctx, testProvider, "dillon@example.io", "dillon")
+	if err != nil {
+		c.Fatalf("mock user err: %v", err)
+	}
+	// fmt.Printf("TOKEN: %s\n", token)
+
+	webID := cr.STSWebIdentity{
+		Client:      s.TestSuiteCommon.client,
+		STSEndpoint: s.endPoint,
+		GetWebIDTokenExpiry: func() (*cr.WebIdentityToken, error) {
+			return &cr.WebIdentityToken{
+				Token: token,
+			}, nil
+		},
+	}
+
+	// Create policy - with name as one of the groups in OpenID the user is
+	// a member of.
+	policy := "projecta"
+	policyBytes := []byte(fmt.Sprintf(`{
+ "Version": "2012-10-17",
+ "Statement": [
+  {
+   "Effect": "Allow",
+   "Action": [
+    "s3:PutObject",
+    "s3:GetObject",
+    "s3:ListBucket"
+   ],
+   "Resource": [
+    "arn:aws:s3:::%s/*"
+   ]
+  }
+ ]
+}`, bucket))
+	err = s.adm.AddCannedPolicy(ctx, policy, policyBytes)
+	if err != nil {
+		c.Fatalf("policy add error: %v", err)
+	}
+
+	value, err := webID.Retrieve()
+	if err != nil {
+		c.Fatalf("Expected to generate STS creds, got err: %#v", err)
+	}
+
+	minioClient, err := minio.New(s.endpoint, &minio.Options{
+		Creds:     cr.NewStaticV4(value.AccessKeyID, value.SecretAccessKey, value.SessionToken),
+		Secure:    s.secure,
+		Transport: s.TestSuiteCommon.client.Transport,
+	})
+	if err != nil {
+		c.Fatalf("Error initializing client: %v", err)
+	}
+
+	// Validate that the client from sts creds can access the bucket.
+	c.mustListObjects(ctx, minioClient, bucket)
+
+	// Validate that the client cannot remove any objects
+	err = minioClient.RemoveObject(ctx, bucket, "someobject", minio.RemoveObjectOptions{})
+	if err.Error() != "Access Denied." {
+		c.Fatalf("unexpected non-access-denied err: %v", err)
+	}
+}
+
+type providerParams struct {
+	clientID, clientSecret, providerURL, redirectURL string
+}
+
+var testProvider = providerParams{
+	clientID:     "minio-client-app",
+	clientSecret: "minio-client-app-secret",
+	providerURL:  "http://127.0.0.1:5556/dex",
+	redirectURL:  "http://127.0.0.1:10000/oauth_callback",
+}
+
+// mockTestUserInteraction - tries to login to dex using provided credentials.
+// It performs the user's browser interaction to login and retrieves the auth
+// code from dex and exchanges it for a JWT.
+func mockTestUserInteraction(ctx context.Context, pro providerParams, username, password string) (string, error) {
+	ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
+	defer cancel()
+
+	provider, err := oidc.NewProvider(ctx, pro.providerURL)
+	if err != nil {
+		return "", fmt.Errorf("unable to create provider: %v", err)
+	}
+
+	// Configure an OpenID Connect aware OAuth2 client.
+	oauth2Config := oauth2.Config{
+		ClientID:     pro.clientID,
+		ClientSecret: pro.clientSecret,
+		RedirectURL:  pro.redirectURL,
+
+		// Discovery returns the OAuth2 endpoints.
+		Endpoint: provider.Endpoint(),
+
+		// "openid" is a required scope for OpenID Connect flows.
+		Scopes: []string{oidc.ScopeOpenID, "groups"},
+	}
+
+	state := "xxx"
+	authCodeURL := oauth2Config.AuthCodeURL(state)
+	// fmt.Printf("authcodeurl: %s\n", authCodeURL)
+
+	var lastReq *http.Request
+	checkRedirect := func(req *http.Request, via []*http.Request) error {
+		// fmt.Printf("CheckRedirect:\n")
+		// fmt.Printf("Upcoming: %s %#v\n", req.URL.String(), req)
+		// for _, c := range via {
+		// 	fmt.Printf("Sofar: %s %#v\n", c.URL.String(), c)
+		// }
+		// Save the last request in a redirect chain.
+		lastReq = req
+		// We do not follow redirect back to client application.
+		if req.URL.Path == "/oauth_callback" {
+			return http.ErrUseLastResponse
+		}
+		return nil
+	}
+
+	dexClient := http.Client{
+		CheckRedirect: checkRedirect,
+	}
+
+	u, err := url.Parse(authCodeURL)
+	if err != nil {
+		return "", fmt.Errorf("url parse err: %v", err)
+	}
+
+	// Start the user auth flow. This page would present the login with
+	// email or LDAP option.
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
+	if err != nil {
+		return "", fmt.Errorf("new request err: %v", err)
+	}
+	_, err = dexClient.Do(req)
+	// fmt.Printf("Do: %#v %#v\n", resp, err)
+	if err != nil {
+		return "", fmt.Errorf("auth url request err: %v", err)
+	}
+
+	// Modify u to choose the ldap option
+	u.Path += "/ldap"
+	// fmt.Println(u)
+
+	// Pick the LDAP login option. This would return a form page after
+	// following some redirects. `lastReq` would be the URL of the form
+	// page, where we need to POST (submit) the form.
+	req, err = http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
+	if err != nil {
+		return "", fmt.Errorf("new request err (/ldap): %v", err)
+	}
+	_, err = dexClient.Do(req)
+	if err != nil {
+		return "", fmt.Errorf("request err: %v", err)
+	}
+
+	// Fill the login form with our test creds:
+	// fmt.Printf("login form url: %s\n", lastReq.URL.String())
+	formData := url.Values{}
+	formData.Set("login", username)
+	formData.Set("password", password)
+	req, err = http.NewRequestWithContext(ctx, http.MethodPost, lastReq.URL.String(), strings.NewReader(formData.Encode()))
+	if err != nil {
+		return "", fmt.Errorf("new request err (/login): %v", err)
+	}
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	_, err = dexClient.Do(req)
+	if err != nil {
+		return "", fmt.Errorf("post form err: %v", err)
+	}
+	// fmt.Printf("resp: %#v %#v\n", resp.StatusCode, resp.Header)
+	// fmt.Printf("lastReq: %#v\n", lastReq.URL.String())
+
+	// On form submission, the last redirect response contains the auth
+	// code, which we now have in `lastReq`. Exchange it for a JWT id_token.
+	q := lastReq.URL.Query()
+	code := q.Get("code")
+	oauth2Token, err := oauth2Config.Exchange(ctx, code)
+	if err != nil {
+		return "", fmt.Errorf("unable to exchange code for id token: %v", err)
+	}
+
+	rawIDToken, ok := oauth2Token.Extra("id_token").(string)
+	if !ok {
+		return "", fmt.Errorf("id_token not found!")
+	}
+
+	// fmt.Printf("TOKEN: %s\n", rawIDToken)
+	return rawIDToken, nil
+}
+
+const (
+	EnvTestOpenIDServer = "OPENID_TEST_SERVER"
+)
+
+// SetUpOpenID - expects to setup an OpenID test server using the test OpenID
+// container and canned data from https://github.com/minio/minio-ldap-testing
+func (s *TestSuiteIAM) SetUpOpenID(c *check, serverAddr string) {
+	ctx, cancel := context.WithTimeout(context.Background(), testDefaultTimeout)
+	defer cancel()
+
+	configCmds := []string{
+		"identity_openid",
+		fmt.Sprintf("config_url=%s/.well-known/openid-configuration", serverAddr),
+		"client_id=minio-client-app",
+		"client_secret=minio-client-app-secret",
+		"claim_name=groups",
+		"scopes=openid,groups",
+		"redirect_uri=http://127.0.0.1:10000/oauth_callback",
+	}
+	_, err := s.adm.SetConfigKV(ctx, strings.Join(configCmds, " "))
+	if err != nil {
+		c.Fatalf("unable to setup OpenID for tests: %v", err)
+	}
+
+	s.RestartIAMSuite(c)
+}
+
+func TestIAMWithOpenIDServerSuite(t *testing.T) {
+	baseTestCases := []TestSuiteCommon{
+		// Init and run test on FS backend with signature v4.
+		{serverType: "FS", signer: signerV4},
+		// Init and run test on FS backend, with tls enabled.
+		{serverType: "FS", signer: signerV4, secure: true},
+		// Init and run test on Erasure backend.
+		{serverType: "Erasure", signer: signerV4},
+		// Init and run test on ErasureSet backend.
+		{serverType: "ErasureSet", signer: signerV4},
+	}
+	testCases := []*TestSuiteIAM{}
+	for _, bt := range baseTestCases {
+		testCases = append(testCases,
+			newTestSuiteIAM(bt, false),
+			newTestSuiteIAM(bt, true),
+		)
+	}
+	for i, testCase := range testCases {
+		etcdStr := ""
+		if testCase.withEtcdBackend {
+			etcdStr = " (with etcd backend)"
+		}
+		t.Run(
+			fmt.Sprintf("Test: %d, ServerType: %s%s", i+1, testCase.serverType, etcdStr),
+			func(t *testing.T) {
+				c := &check{t, testCase.serverType}
+				suite := testCase
+
+				openIDServer := os.Getenv(EnvTestOpenIDServer)
+				if openIDServer == "" {
+					c.Skip("Skipping OpenID test as no OpenID server is provided.")
+				}
+
+				suite.SetUpSuite(c)
+				suite.SetUpOpenID(c, openIDServer)
+				suite.TestOpenIDSTS(c)
+				suite.TearDownSuite(c)
+			},
+		)
+	}
+}
diff --git a/go.mod b/go.mod
index 3c75c61ad..624af4e5f 100644
--- a/go.mod
+++ b/go.mod
@@ -16,6 +16,7 @@ require (
 	github.com/cheggaaa/pb v1.0.29
 	github.com/colinmarc/hdfs/v2 v2.2.0
 	github.com/coredns/coredns v1.4.0
+	github.com/coreos/go-oidc v2.1.0+incompatible
 	github.com/cosnicolaou/pbzip2 v1.0.1
 	github.com/dchest/siphash v1.2.1
 	github.com/djherbis/atime v1.0.0
@@ -84,7 +85,8 @@ require (
 	go.uber.org/atomic v1.9.0
 	go.uber.org/zap v1.19.1
 	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
-	golang.org/x/net v0.0.0-20211020060615-d418f374d309 // indirect
+	golang.org/x/net v0.0.0-20211020060615-d418f374d309
+	golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f
 	golang.org/x/sys v0.0.0-20211020174200-9d6173849985
 	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac
 	google.golang.org/api v0.58.0
diff --git a/go.sum b/go.sum
index 59ae9ccff..5e0c49d67 100644
--- a/go.sum
+++ b/go.sum
@@ -265,6 +265,7 @@ github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkE
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
+github.com/coreos/go-oidc v2.1.0+incompatible h1:sdJrfw8akMnCuUlaZU3tE/uYXFgfqom8DBE9so9EBsM=
 github.com/coreos/go-oidc v2.1.0+incompatible/go.mod h1:CgnwVTmzoESiwO9qyAFEMiHoZ1nMCKZlZ9V6mm3/LKc=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
@@ -1276,6 +1277,7 @@ github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH
 github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=
 github.com/posener/complete v1.2.3 h1:NP0eAhjcjImqslEwo/1hq7gpajME0fTLTezBKDqfXqo=
 github.com/posener/complete v1.2.3/go.mod h1:WZIdtGGp+qx0sLrYKtIRAruyNpv6hFCicSgv7Sy7s/s=
+github.com/pquerna/cachecontrol v0.0.0-20171018203845-0dec1b30a021 h1:0XM1XL/OFFJjXsYXlG30spTkV/E9+gmd5GD1w2HE8xM=
 github.com/pquerna/cachecontrol v0.0.0-20171018203845-0dec1b30a021/go.mod h1:prYjPmNq4d1NPVmpShWobRqXY3q7Vp+80DqgxxUrUIA=
 github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring v0.44.1/go.mod h1:3WYi4xqXxGGXWDdQIITnLNmuDzO5n6wYva9spVhR4fg=
 github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring v0.46.0/go.mod h1:3WYi4xqXxGGXWDdQIITnLNmuDzO5n6wYva9spVhR4fg=
@@ -2214,6 +2216,7 @@ gopkg.in/jcmturner/rpc.v1 v1.1.0/go.mod h1:YIdkC4XfD6GXbzje11McwsDuOlZQSb9W4vfLv
 gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/square/go-jose.v2 v2.2.2/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
+gopkg.in/square/go-jose.v2 v2.3.1 h1:SK5KegNXmKmqE342YYN2qPHEnUYeoMiXXl1poUlI+o4=
 gopkg.in/square/go-jose.v2 v2.3.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/urfave/cli.v1 v1.20.0/go.mod h1:vuBzUtMdQeixQj8LVd+/98pzhxNGQoyuPBlsXHOQNO0=