/
login.go
235 lines (192 loc) · 6.04 KB
/
login.go
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package auth
import (
"context"
"fmt"
"net/url"
"os"
"strings"
"github.com/ninech/nctl/api"
"github.com/ninech/nctl/api/util"
"github.com/ninech/nctl/internal/format"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
)
type LoginCmd struct {
APIURL string `help:"The URL of the Nine API" default:"https://nineapis.ch" env:"NCTL_API_URL" name:"api-url"`
APIToken string `help:"Use a static API token instead of using an OIDC login. You need to specify the --organization parameter as well." env:"NCTL_API_TOKEN"`
Organization string `help:"The name of your organization to use when providing an API token. This parameter is only used when providing a API token. This parameter needs to be set if you use --api-token." env:"NCTL_ORGANIZATION"`
IssuerURL string `help:"Issuer URL is the OIDC issuer URL of the API." default:"https://auth.nine.ch/auth/realms/pub"`
ClientID string `help:"Client ID is the OIDC client ID of the API." default:"nineapis.ch-f178254"`
}
func (l *LoginCmd) Run(ctx context.Context, command string, tk api.TokenGetter) error {
apiURL, err := url.Parse(l.APIURL)
if err != nil {
return err
}
issuerURL, err := url.Parse(l.IssuerURL)
if err != nil {
return err
}
loadingRules, err := api.LoadingRules()
if err != nil {
return err
}
if len(l.APIToken) != 0 {
if len(l.Organization) == 0 {
return fmt.Errorf("you need to set the --organization parameter explicitly if you use --api-token")
}
userInfo, err := api.GetUserInfoFromToken(l.APIToken)
if err != nil {
return err
}
cfg, err := newAPIConfig(apiURL, issuerURL, command, l.ClientID, useStaticToken(l.APIToken), withOrganization(l.Organization))
if err != nil {
return err
}
return login(ctx, cfg, loadingRules.GetDefaultFilename(), userInfo.User, "", project(l.Organization))
}
usePKCE := true
token, err := tk.GetTokenString(ctx, l.IssuerURL, l.ClientID, usePKCE)
if err != nil {
return err
}
userInfo, err := api.GetUserInfoFromToken(token)
if err != nil {
return err
}
if len(userInfo.Orgs) == 0 {
return fmt.Errorf("error getting an organization for the account %q. Please contact support", userInfo.User)
}
org := userInfo.Orgs[0]
if len(userInfo.Orgs) > 1 {
fmt.Printf("Multiple organizations found for the account %q.\n", userInfo.User)
fmt.Printf("Defaulting to %q\n", org)
printAvailableOrgsString(org, userInfo.Orgs)
}
cfg, err := newAPIConfig(apiURL, issuerURL, command, l.ClientID, withOrganization(org))
if err != nil {
return err
}
return login(ctx, cfg, loadingRules.GetDefaultFilename(), userInfo.User, "", project(org))
}
type apiConfig struct {
name string
token string
caCert []byte
organization string
}
type apiConfigOption func(*apiConfig)
func overrideName(name string) apiConfigOption {
return func(ac *apiConfig) {
ac.name = name
}
}
func setCACert(caCert []byte) apiConfigOption {
return func(ac *apiConfig) {
ac.caCert = caCert
}
}
func useStaticToken(token string) apiConfigOption {
return func(ac *apiConfig) {
ac.token = token
}
}
func withOrganization(organization string) apiConfigOption {
return func(ac *apiConfig) {
ac.organization = organization
}
}
func newAPIConfig(apiURL, issuerURL *url.URL, command, clientID string, opts ...apiConfigOption) (*clientcmdapi.Config, error) {
cfg := &apiConfig{
name: apiURL.Host,
}
for _, opt := range opts {
opt(cfg)
}
extension, err := NewConfig(cfg.organization).ToObject()
if err != nil {
return nil, err
}
clientConfig := &clientcmdapi.Config{
Clusters: map[string]*clientcmdapi.Cluster{
cfg.name: {
Server: apiURL.String(),
CertificateAuthorityData: cfg.caCert,
},
},
Contexts: map[string]*clientcmdapi.Context{
cfg.name: {
Cluster: cfg.name,
AuthInfo: cfg.name,
Extensions: map[string]runtime.Object{
util.NctlName: extension,
},
},
},
AuthInfos: map[string]*clientcmdapi.AuthInfo{},
CurrentContext: cfg.name,
}
if len(cfg.token) != 0 {
clientConfig.AuthInfos[cfg.name] = &clientcmdapi.AuthInfo{
Token: cfg.token,
}
return clientConfig, nil
}
clientConfig.AuthInfos[cfg.name] = &clientcmdapi.AuthInfo{
Exec: execConfig(command, clientID, issuerURL),
}
return clientConfig, nil
}
type loginConfig struct {
project string
switchCurrentContext bool
}
type loginOption func(*loginConfig)
// project overrides the project in the new config
func project(project string) loginOption {
return func(l *loginConfig) {
l.project = project
}
}
// switchCurrentContext sets the context of the merged kubeconfig to the one
// defined in the newConfig
func switchCurrentContext() loginOption {
return func(l *loginConfig) {
l.switchCurrentContext = true
}
}
func login(ctx context.Context, newConfig *clientcmdapi.Config, kubeconfigPath, userName string, toOrg string, opts ...loginOption) error {
loginConfig := &loginConfig{}
for _, opt := range opts {
opt(loginConfig)
}
if loginConfig.project != "" && newConfig.Contexts[newConfig.CurrentContext] != nil {
newConfig.Contexts[newConfig.CurrentContext].Namespace = loginConfig.project
}
kubeconfig, err := clientcmd.LoadFromFile(kubeconfigPath)
if err != nil {
if !os.IsNotExist(err) {
return err
}
// kubeconfig file does not exist so we just use our new config
kubeconfig = newConfig
}
mergeKubeConfig(newConfig, kubeconfig)
if loginConfig.switchCurrentContext {
kubeconfig.CurrentContext = newConfig.CurrentContext
}
if err := clientcmd.WriteToFile(*kubeconfig, kubeconfigPath); err != nil {
return err
}
if toOrg != "" {
format.PrintSuccessf("🏢", "switched to the organization %q", toOrg)
}
format.PrintSuccessf("📋", "added %s to kubeconfig", newConfig.CurrentContext)
loginMessage := fmt.Sprintf("logged into cluster %s", newConfig.CurrentContext)
if strings.TrimSpace(userName) != "" {
loginMessage = fmt.Sprintf("logged into cluster %s as %s", newConfig.CurrentContext, userName)
}
format.PrintSuccessf("🚀", loginMessage)
return nil
}