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brightbox_auth.go
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brightbox_auth.go
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// Copyright 2020 Brightbox Systems Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package k8ssdk
import (
"context"
"fmt"
"os"
brightbox "github.com/brightbox/gobrightbox/v2"
"github.com/brightbox/gobrightbox/v2/clientcredentials"
"github.com/brightbox/gobrightbox/v2/endpoint"
"github.com/brightbox/gobrightbox/v2/passwordcredentials"
"github.com/hashicorp/go-cleanhttp"
"golang.org/x/oauth2"
klog "k8s.io/klog/v2"
)
const (
defaultClientID = "app-dkmch"
defaultClientSecret = "uogoelzgt0nwawb"
clientEnvVar = "BRIGHTBOX_CLIENT"
clientSecretEnvVar = "BRIGHTBOX_CLIENT_SECRET"
usernameEnvVar = "BRIGHTBOX_USER_NAME"
passwordEnvVar = "BRIGHTBOX_PASSWORD"
accountEnvVar = "BRIGHTBOX_ACCOUNT"
apiURLEnvVar = "BRIGHTBOX_API_URL"
defaultTimeoutSeconds = 10
// ValidAcmeDomainStatus indicates a valid acme state
ValidAcmeDomainStatus = "valid"
)
type authdetails struct {
APIClient string
APISecret string
UserName string
password string
Account string
APIURL string
}
// obtainCloudClient creates a new Brightbox client using details from
// the environment
func obtainCloudClient() (CloudAccess, error) {
klog.V(4).Infof("obtainCloudClient")
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
return configureClient(
ctx,
authdetails{
APIClient: getenvWithDefault(clientEnvVar,
defaultClientID),
APISecret: getenvWithDefault(clientSecretEnvVar,
defaultClientSecret),
UserName: os.Getenv(usernameEnvVar),
password: os.Getenv(passwordEnvVar),
Account: os.Getenv(accountEnvVar),
APIURL: os.Getenv(apiURLEnvVar),
},
)
}
// Validate account config entries
func validateConfig(authd authdetails) error {
klog.V(4).Infof("validateConfig")
if authd.APIClient == defaultClientID &&
authd.APISecret == defaultClientSecret {
if authd.Account == "" {
return fmt.Errorf("must specify Account with User Credentials")
}
} else {
if authd.UserName != "" || authd.password != "" {
return fmt.Errorf("User Credentials not used with API Client")
}
}
return nil
}
func configureClient(ctx context.Context, authd authdetails) (CloudAccess, error) {
klog.V(4).Infof("configureClient")
if err := validateConfig(authd); err != nil {
return nil, err
}
return authenticatedClient(ctx, authd)
}
// Authenticate the details and return a client
func authenticatedClient(authCtx context.Context, authd authdetails) (CloudAccess, error) {
klog.V(4).Infof("configureClient")
apiContext, apiCancel := context.WithCancel(context.Background())
defer apiCancel()
apiContext = contextWithLoggedHTTPClient(apiContext)
client, err := brightbox.Connect(apiContext, confFromAuthd(authd))
if err != nil {
return nil, err
}
if authd.Account == "" {
klog.V(4).Infof("Obtaining default account")
accounts, err := client.Accounts(authCtx)
if err != nil {
return nil, err
}
authd.Account = accounts[0].ID
klog.V(4).Infof("default account is %v", authd.Account)
}
return client, nil
}
func confFromAuthd(authd authdetails) brightbox.Oauth2 {
if authd.UserName != "" || authd.password != "" {
return &passwordcredentials.Config{
UserName: authd.UserName,
Password: authd.password,
ID: authd.APIClient,
Secret: authd.APISecret,
Config: endpoint.Config{
BaseURL: authd.APIURL,
Account: authd.Account,
Scopes: endpoint.FullScope,
},
}
}
return &clientcredentials.Config{
ID: authd.APIClient,
Secret: authd.APISecret,
Config: endpoint.Config{
BaseURL: authd.APIURL,
Scopes: endpoint.FullScope,
},
}
}
func contextWithLoggedHTTPClient(ctx context.Context) context.Context {
client := cleanhttp.DefaultClient()
return context.WithValue(ctx, oauth2.HTTPClient, client)
}