Use subnet package in pkg for license validation

Most of the code related to license validation is now available in
minio/pkg. So remove it from console and use the function(s) from pkg

api/admin_subnet.go

@@ -356,7 +356,7 @@ func GetSubnetInfoResponse(session *models.Principal, params subnetApi.SubnetInf
 		return nil, ErrorWithContext(ctx, ErrSubnetLicenseNotFound)
 	}
 
-	licenseInfo, err := subnet.ParseLicense(client, seededLicense)
+	licenseInfo, err := getLicenseInfo(*client.Client, seededLicense)
 	if err != nil {
 		return nil, ErrorWithContext(ctx, err)
 	}

api/license.go

@@ -17,9 +17,11 @@
 package api
 
 import (
+	"net/http"
 	"os"
 
-	"github.com/minio/console/pkg/subnet"
+	"github.com/minio/pkg/v2/licverifier"
+	"github.com/minio/pkg/v2/subnet"
 )
 
 type SubnetPlan int
@@ -43,8 +45,18 @@ func (sp SubnetPlan) String() string {
 
 var InstanceLicensePlan = PlanAGPL
 
+func getLicenseInfo(client http.Client, license string) (*licverifier.LicenseInfo, error) {
+	lv := subnet.LicenseValidator{
+		Client:            client,
+		ExpiryGracePeriod: 0,
+	}
+	lv.Init(getConsoleDevMode())
+	return lv.ParseLicense(license)
+}
+
 func fetchLicensePlan() {
-	licenseInfo, err := subnet.ParseLicense(GetConsoleHTTPClient("", "127.0.0.1"), os.Getenv(EnvSubnetLicense))
+	client := GetConsoleHTTPClient("", "127.0.0.1")
+	licenseInfo, err := getLicenseInfo(*client, os.Getenv(EnvSubnetLicense))
 	if err != nil {
 		return
 	}

pkg/subnet/subnet.go

@@ -18,15 +18,11 @@
 package subnet
 
 import (
-	"bytes"
 	"encoding/json"
 	"errors"
-	"fmt"
 
 	"github.com/minio/console/pkg/http"
 
-	"github.com/minio/pkg/v2/licverifier"
-
 	"github.com/minio/console/models"
 	"github.com/minio/madmin-go/v3"
 	mc "github.com/minio/mc/cmd"
@@ -124,46 +120,6 @@ func Register(client http.ClientI, admInfo madmin.InfoMessage, apiKey, token, ac
 	return nil, errors.New("subnet api key not found")
 }
 
-const publicKey = "/downloads/license-pubkey.pem"
-
-// downloadSubnetPublicKey will download the current subnet public key.
-func downloadSubnetPublicKey(client http.ClientI) (string, error) {
-	// Get the public key directly from Subnet
-	url := fmt.Sprintf("%s%s", subnetBaseURL(), publicKey)
-	resp, err := client.Get(url)
-	if err != nil {
-		return "", err
-	}
-	defer resp.Body.Close()
-	buf := new(bytes.Buffer)
-	_, err = buf.ReadFrom(resp.Body)
-	if err != nil {
-		return "", err
-	}
-	return buf.String(), err
-}
-
-// ParseLicense parses the license with the bundle public key and return it's information
-func ParseLicense(client http.ClientI, license string) (*licverifier.LicenseInfo, error) {
-	var publicKeys []string
-
-	subnetPubKey, err := downloadSubnetPublicKey(client)
-	if err != nil {
-		// there was an issue getting the subnet public key
-		// use hardcoded public keys instead
-		publicKeys = OfflinePublicKeys
-	} else {
-		publicKeys = append(publicKeys, subnetPubKey)
-	}
-
-	licenseInfo, err := GetLicenseInfoFromJWT(license, publicKeys)
-	if err != nil {
-		return nil, err
-	}
-
-	return licenseInfo, nil
-}
-
 func GetAPIKey(client http.ClientI, token string) (string, error) {
 	resp, err := subnetGetReq(client, subnetAPIKeyURL(), subnetAuthHeaders(token))
 	if err != nil {