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azure.go
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azure.go
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/*
* Copyright 2021 Fraunhofer AISEC
*
* 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.
*
* $$\ $$\ $$\ $$\
* $$ | $$ |\__| $$ |
* $$$$$$$\ $$ | $$$$$$\ $$\ $$\ $$$$$$$ |$$\ $$$$$$\ $$$$$$\ $$$$$$\
* $$ _____|$$ |$$ __$$\ $$ | $$ |$$ __$$ |$$ |\_$$ _| $$ __$$\ $$ __$$\
* $$ / $$ |$$ / $$ |$$ | $$ |$$ / $$ |$$ | $$ | $$ / $$ |$$ | \__|
* $$ | $$ |$$ | $$ |$$ | $$ |$$ | $$ |$$ | $$ |$$\ $$ | $$ |$$ |
* \$$$$$$\ $$ |\$$$$$ |\$$$$$ |\$$$$$$ |$$ | \$$$ |\$$$$$ |$$ |
* \_______|\__| \______/ \______/ \_______|\__| \____/ \______/ \__|
*
* This file is part of Clouditor Community Edition.
*/
package azure
import (
"context"
"errors"
"github.com/Azure/azure-sdk-for-go/profiles/2020-09-01/resources/mgmt/subscriptions"
"github.com/Azure/go-autorest/autorest"
"github.com/sirupsen/logrus"
)
var log *logrus.Entry
type DiscoveryOption interface {
apply(*autorest.Client)
}
type senderOption struct {
sender autorest.Sender
}
func (o senderOption) apply(client *autorest.Client) {
client.Sender = o.sender
}
func WithSender(sender autorest.Sender) DiscoveryOption {
return &senderOption{sender}
}
type authorizerOption struct {
authorizer autorest.Authorizer
}
func WithAuthorizer(authorizer autorest.Authorizer) DiscoveryOption {
return &authorizerOption{authorizer: authorizer}
}
func init() {
log = logrus.WithField("component", "azure-discovery")
}
func (a authorizerOption) apply(client *autorest.Client) {
client.Authorizer = a.authorizer
}
type azureDiscovery struct {
authOption *authorizerOption
sub subscriptions.Subscription
isAuthorized bool
options []DiscoveryOption
}
func (a *azureDiscovery) authorize() (err error) {
if a.authOption == nil {
return errors.New("no authorized was available")
}
// for now, do not re-authorize. in the future, we would probably need to check, if
// the token is still valid. or maybe Azure does this for us?
if a.isAuthorized {
return
}
subClient := subscriptions.NewClient()
a.apply(&subClient.Client)
// get first subcription
page, _ := subClient.List(context.Background())
a.sub = page.Values()[0]
log.Infof("Using %s as subscription", *a.sub.SubscriptionID)
a.isAuthorized = true
return nil
}
func (a azureDiscovery) apply(client *autorest.Client) {
if a.authOption != nil {
a.authOption.apply(client)
}
for _, v := range a.options {
v.apply(client)
}
}