Move nonce to the session

okta-hosted-login/go.mod

@@ -0,0 +1,23 @@
+module github.com/okta/samples-golang/okta-hosted-login
+
+go 1.21
+
+require (
+	github.com/gorilla/sessions v1.2.1
+	github.com/okta/okta-jwt-verifier-golang v1.3.1
+)
+
+require (
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.0-20210816181553-5444fa50b93d // indirect
+	github.com/goccy/go-json v0.9.4 // indirect
+	github.com/gorilla/securecookie v1.1.1 // indirect
+	github.com/lestrrat-go/backoff/v2 v2.0.8 // indirect
+	github.com/lestrrat-go/blackmagic v1.0.0 // indirect
+	github.com/lestrrat-go/httpcc v1.0.0 // indirect
+	github.com/lestrrat-go/iter v1.0.1 // indirect
+	github.com/lestrrat-go/jwx v1.2.18 // indirect
+	github.com/lestrrat-go/option v1.0.0 // indirect
+	github.com/patrickmn/go-cache v0.0.0-20180815053127-5633e0862627 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	golang.org/x/crypto v0.14.0 // indirect
+)

okta-hosted-login/go.sum

@@ -0,0 +1,72 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.0-20210816181553-5444fa50b93d h1:1iy2qD6JEhHKKhUOA9IWs7mjco7lnw2qx8FsRI2wirE=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.0-20210816181553-5444fa50b93d/go.mod h1:tmAIfUFEirG/Y8jhZ9M+h36obRZAk/1fcSpXwAVlfqE=
+github.com/goccy/go-json v0.9.4 h1:L8MLKG2mvVXiQu07qB6hmfqeSYQdOnqPot2GhsIwIaI=
+github.com/goccy/go-json v0.9.4/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
+github.com/gorilla/securecookie v1.1.1 h1:miw7JPhV+b/lAHSXz4qd/nN9jRiAFV5FwjeKyCS8BvQ=
+github.com/gorilla/securecookie v1.1.1/go.mod h1:ra0sb63/xPlUeL+yeDciTfxMRAA+MP+HVt/4epWDjd4=
+github.com/gorilla/sessions v1.2.1 h1:DHd3rPN5lE3Ts3D8rKkQ8x/0kqfeNmBAaiSi+o7FsgI=
+github.com/gorilla/sessions v1.2.1/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
+github.com/lestrrat-go/backoff/v2 v2.0.8 h1:oNb5E5isby2kiro9AgdHLv5N5tint1AnDVVf2E2un5A=
+github.com/lestrrat-go/backoff/v2 v2.0.8/go.mod h1:rHP/q/r9aT27n24JQLa7JhSQZCKBBOiM/uP402WwN8Y=
+github.com/lestrrat-go/blackmagic v1.0.0 h1:XzdxDbuQTz0RZZEmdU7cnQxUtFUzgCSPq8RCz4BxIi4=
+github.com/lestrrat-go/blackmagic v1.0.0/go.mod h1:TNgH//0vYSs8VXDCfkZLgIrVTTXQELZffUV0tz3MtdQ=
+github.com/lestrrat-go/codegen v1.0.0/go.mod h1:JhJw6OQAuPEfVKUCLItpaVLumDGWQznd1VaXrBk9TdM=
+github.com/lestrrat-go/httpcc v1.0.0 h1:FszVC6cKfDvBKcJv646+lkh4GydQg2Z29scgUfkOpYc=
+github.com/lestrrat-go/httpcc v1.0.0/go.mod h1:tGS/u00Vh5N6FHNkExqGGNId8e0Big+++0Gf8MBnAvE=
+github.com/lestrrat-go/iter v1.0.1 h1:q8faalr2dY6o8bV45uwrxq12bRa1ezKrB6oM9FUgN4A=
+github.com/lestrrat-go/iter v1.0.1/go.mod h1:zIdgO1mRKhn8l9vrZJZz9TUMMFbQbLeTsbqPDrJ/OJc=
+github.com/lestrrat-go/jwx v1.2.18 h1:RV4hcTRUlPVYUnGqATKXEojoOsLexoU8Na4KheVzxQ8=
+github.com/lestrrat-go/jwx v1.2.18/go.mod h1:bWTBO7IHHVMtNunM8so9MT8wD+euEY1PzGEyCnuI2qM=
+github.com/lestrrat-go/option v0.0.0-20210103042652-6f1ecfceda35/go.mod h1:5ZHFbivi4xwXxhxY9XHDe2FHo6/Z7WWmtT7T5nBBp3I=
+github.com/lestrrat-go/option v1.0.0 h1:WqAWL8kh8VcSoD6xjSH34/1m8yxluXQbDeKNfvFeEO4=
+github.com/lestrrat-go/option v1.0.0/go.mod h1:5ZHFbivi4xwXxhxY9XHDe2FHo6/Z7WWmtT7T5nBBp3I=
+github.com/lestrrat-go/pdebug/v3 v3.0.1/go.mod h1:za+m+Ve24yCxTEhR59N7UlnJomWwCiIqbJRmKeiADU4=
+github.com/okta/okta-jwt-verifier-golang v1.3.1 h1:V+9W5KD3nG7xN0UYtnzXtkurGcs71bLwzPFuUGNMwdE=
+github.com/okta/okta-jwt-verifier-golang v1.3.1/go.mod h1:cHffA777f7Yi4K+yDzUp89sGD5v8sk04Pc3CiT1OMR8=
+github.com/patrickmn/go-cache v0.0.0-20180815053127-5633e0862627 h1:pSCLCl6joCFRnjpeojzOpEYs4q7Vditq8fySFG5ap3Y=
+github.com/patrickmn/go-cache v0.0.0-20180815053127-5633e0862627/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20201217014255-9d1352758620/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
+golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
+golang.org/x/crypto v0.1.0/go.mod h1:RecgLatLF4+eUMCP1PoPZQb+cVrJcOPbHkTkbkB9sbw=
+golang.org/x/crypto v0.14.0 h1:wBqGXzWJW6m1XrIKlAH0Hs1JJ7+9KBwnIO8v66Q9cHc=
+golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
+golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

okta-hosted-login/main.go

@@ -22,7 +22,6 @@ var (
 	tpl          *template.Template
 	sessionStore = sessions.NewCookieStore([]byte("okta-hosted-login-session-store"))
 	state        = generateState()
-	nonce        = "NonceNotSetYet"
 )
 
 func init() {
@@ -69,7 +68,20 @@ func HomeHandler(w http.ResponseWriter, r *http.Request) {
 func LoginHandler(w http.ResponseWriter, r *http.Request) {
 	w.Header().Add("Cache-Control", "no-cache") // See https://github.com/okta/samples-golang/issues/20
 
-	nonce, _ = oktaUtils.GenerateNonce()
+	// Create a session and generate a new nonce for each login attempt
+	session, err := sessionStore.Get(r, "okta-hosted-login-session-store")
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	nonce, _ := oktaUtils.GenerateNonce()
+	session.Values["nonce"] = nonce // Store the nonce in the session
+	if err := session.Save(r, w); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
 	var redirectPath string
 
 	q := r.URL.Query()
@@ -108,9 +120,17 @@ func AuthCodeCallbackHandler(w http.ResponseWriter, r *http.Request) {
 	session, err := sessionStore.Get(r, "okta-hosted-login-session-store")
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// Retrieve the nonce from the session
+	sessionNonce, ok := session.Values["nonce"].(string)
+	if !ok || sessionNonce == "" {
+		fmt.Fprintln(w, "Nonce could not be retrieved from the session.")
+		return
 	}
 
-	_, verificationError := verifyToken(exchange.IdToken)
+	_, verificationError := verifyToken(exchange.IdToken, sessionNonce)
 
 	if verificationError != nil {
 		fmt.Println(verificationError)
@@ -217,9 +237,9 @@ func getProfileData(r *http.Request) map[string]string {
 	return m
 }
 
-func verifyToken(t string) (*verifier.Jwt, error) {
+func verifyToken(t string, nonce string) (*verifier.Jwt, error) {
 	tv := map[string]string{}
-	tv["nonce"] = nonce
+	tv["nonce"] = nonce // Use the nonce from the session
 	tv["aud"] = os.Getenv("CLIENT_ID")
 	jv := verifier.JwtVerifier{
 		Issuer:           os.Getenv("ISSUER"),