Preflight openssl verify (#436)

* qliksense preflight verify-ca-chain, included into all preflight checks and doc updates

cmd/qliksense/preflight.go

@@ -472,3 +472,42 @@ func pfCleanupCmd(q *qliksense.Qliksense) *cobra.Command {
 	f.BoolVarP(&preflightOpts.Verbose, "verbose", "v", false, "verbose mode")
 	return pfCleanCmd
 }
+
+func pfVerifyCAChainCmd(q *qliksense.Qliksense) *cobra.Command {
+	out := ansi.NewColorableStdout()
+	preflightOpts := &preflight.PreflightOptions{
+		MongoOptions: &preflight.MongoOptions{},
+	}
+
+	var pfVerifyCAChainCmd = &cobra.Command{
+		Use:     "verify-ca-chain",
+		Short:   "verify-ca-chain using openssl verify",
+		Long:    `verify the CA chain using openssl verify to ensure that mongodb certificate is valid`,
+		Example: `qliksense preflight verify-ca-chain`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			qp := &preflight.QliksensePreflight{Q: q, P: preflightOpts, CG: &api.ClientGoUtils{Verbose: preflightOpts.Verbose}}
+
+			// Preflight service check
+			namespace, kubeConfigContents, err := qp.CG.LoadKubeConfigAndNamespace()
+			if err != nil {
+				fmt.Fprintf(out, "%s\n", Red("FAILED"))
+				fmt.Printf("Error: %v\n", err)
+				return nil
+			}
+
+			if namespace == "" {
+				namespace = "default"
+			}
+			if err = qp.VerifyCAChain(kubeConfigContents, namespace, preflightOpts, false); err != nil {
+				fmt.Fprintf(out, "%s\n", Red("FAILED"))
+				fmt.Printf("Error: %v\n", err)
+				return nil
+			}
+			fmt.Fprintf(out, "%s\n", Green("PASSED"))
+			return nil
+		},
+	}
+	f := pfVerifyCAChainCmd.Flags()
+	f.BoolVarP(&preflightOpts.Verbose, "verbose", "v", false, "verbose mode")
+	return pfVerifyCAChainCmd
+}

cmd/qliksense/root.go

@@ -209,6 +209,7 @@ func rootCmd(p *qliksense.Qliksense) *cobra.Command {
 	preflightCmd.AddCommand(pfCreateRoleBindingCheckCmd(p))
 	preflightCmd.AddCommand(pfCreateServiceAccountCheckCmd(p))
 	preflightCmd.AddCommand(pfCreateAuthCheckCmd(p))
+	preflightCmd.AddCommand(pfVerifyCAChainCmd(p))
 	preflightCmd.AddCommand(pfCleanupCmd(p))
 
 	cmd.AddCommand(preflightCmd)

docs/preflight_checks.md

@@ -305,3 +305,21 @@ Removing mongo check components...
 Preflight cleanup complete
 
 ```
+
+### Verify-ca-chain check
+We use the command below to verify the ca certificate chain and server certificate. We run this check over mongodbUrl and discoveryUrl we inferred from idpconfigs in the CR.
+```shell
+$ qliksense preflight preflight verify-ca-chain -v
+
+Preflight verify-ca-chain check... 
+----------------------------------- 
+Openssl verify mongodbUrl:
+Mongodb url inferred form CR: <mongodbUrl_from_CR>
+Host: <host extracted from mongodbUrl>
+
+Openssl verify discoveryUrl:
+Discovery url: <discoveryUrl_from_CR>
+Host: <host extracted from discoveryUrl>
+Completed preflight verify-CA-chain check
+PASSED
+```

pkg/preflight/all_checks.go

@@ -103,6 +103,16 @@ func (qp *QliksensePreflight) RunAllPreflightChecks(kubeConfigContents []byte, n
 	}
 	totalCount++
 
+	// Preflight verify ca chain check
+	if err := qp.VerifyCAChain(kubeConfigContents, namespace, preflightOpts, false); err != nil {
+		fmt.Fprintf(out, "%s\n", Red("FAILED"))
+		fmt.Printf("Error: %v\n\n", err)
+	} else {
+		fmt.Fprintf(out, "%s\n\n", Green("PASSED"))
+		checkCount++
+	}
+	totalCount++
+
 	if checkCount == totalCount {
 		// All preflight checks were successful
 		return nil

pkg/preflight/verify_ca.go

@@ -0,0 +1,118 @@
+package preflight
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"strings"
+
+	qapi "github.com/qlik-oss/sense-installer/pkg/api"
+)
+
+func (qp *QliksensePreflight) VerifyCAChain(kubeConfigContents []byte, namespace string, preflightOpts *PreflightOptions, cleanup bool) error {
+
+	var currentCR *qapi.QliksenseCR
+	var err error
+	qConfig := qapi.NewQConfig(qp.Q.QliksenseHome)
+	qConfig.SetNamespace(namespace)
+
+	fmt.Print("Preflight verify-ca-chain check... ")
+	qp.CG.LogVerboseMessage("\n----------------------------------- \n")
+
+	currentCR, err = qConfig.GetCurrentCR()
+	if err != nil {
+		qp.CG.LogVerboseMessage("Unable to retrieve current CR: %v\n", err)
+		return err
+	}
+	decryptedCR, err := qConfig.GetDecryptedCr(currentCR)
+	if err != nil {
+		qp.CG.LogVerboseMessage("An error occurred while retrieving mongodbUrl from current CR: %v\n", err)
+		return err
+	}
+
+	// infer ca certs form CR
+	caCertificates := strings.TrimSpace(decryptedCR.Spec.GetFromSecrets("qliksense", "caCertificates"))
+
+	fmt.Println("Openssl verify mongodbUrl:")
+	// infer mongodb url from CR
+	mongodbUrl := strings.TrimSpace(decryptedCR.Spec.GetFromSecrets("qliksense", "mongodbUri"))
+	qp.CG.LogVerboseMessage("Mongodb url inferred form CR: %s\n", mongodbUrl)
+
+	// parse out server and port from mongodb url and execute openssl verify
+	if err := qp.extractCertAndVerify(mongodbUrl, caCertificates); err != nil {
+		return err
+	}
+
+	fmt.Printf("\nOpenssl verify discoveryUrl:\n")
+	// infer idpConfigs form CR
+	idpConfigs := strings.TrimSpace(decryptedCR.Spec.GetFromSecrets("identity-providers", "idpConfigs"))
+
+	data := []map[string]interface{}{}
+	if err := json.Unmarshal([]byte(idpConfigs), &data); err != nil {
+		panic(err)
+	}
+
+	var discoveryUrl string
+	for _, idpData := range data {
+		discoveryUrl = idpData["discoveryUrl"].(string)
+		qp.CG.LogVerboseMessage("Discovery url: %s\n", discoveryUrl)
+	}
+	if err := qp.extractCertAndVerify(discoveryUrl, caCertificates); err != nil {
+		return err
+	}
+
+	qp.CG.LogVerboseMessage("Completed preflight verify-ca-chain check\n")
+	return nil
+}
+
+func (qp *QliksensePreflight) extractCertAndVerify(server string, caCertificates string) error {
+	u, err := url.Parse(server)
+	if err != nil {
+		return fmt.Errorf("unable to parse url: %v", err)
+	}
+
+	switch strings.ToLower(u.Scheme) {
+	case "http":
+		return fmt.Errorf("http url is not supported for this operation")
+	case "https":
+		if u.Port() == "" {
+			u.Host += ":443"
+		}
+	}
+
+	qp.CG.LogVerboseMessage("Host: %s, port: %s\n", u.Host, u.Port())
+	conn, err := tls.Dial("tcp", u.Host, &tls.Config{})
+	qp.CG.LogVerboseMessage("Host: %s\n", u.Host)
+	if err != nil {
+		return fmt.Errorf("failed to connect: " + err.Error())
+	}
+	defer conn.Close()
+
+	// Get the ConnectionState struct as that's the one which gives us x509.Certificate struct
+	x509Certificates := conn.ConnectionState().PeerCertificates
+
+	if len(x509Certificates) == 0 {
+		return fmt.Errorf("no server certificates retrieved from the server")
+	}
+	if len(x509Certificates) > 1 {
+		return fmt.Errorf("more than 1 server certificate retrieved from the server")
+	}
+	//  execute verify cmd
+	roots := x509.NewCertPool()
+	ok := roots.AppendCertsFromPEM([]byte(caCertificates))
+	if !ok {
+		return fmt.Errorf("failed to parse root certificate.")
+	}
+
+	opts := x509.VerifyOptions{
+		Roots:         roots,
+		DNSName:       u.Hostname(),
+		Intermediates: x509.NewCertPool(),
+	}
+	if _, err := x509Certificates[0].Verify(opts); err != nil {
+		return fmt.Errorf("failed to verify certificate: " + err.Error())
+	}
+	return nil
+}