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validations.go
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validations.go
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// Copyright 2014-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"). You may
// not use this file except in compliance with the License. A copy of the
// License is located at
//
// http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file 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 updater
import (
"errors"
"net/url"
"strings"
"github.com/aws/amazon-ecs-agent/agent/acs/model/ecsacs"
)
func validateUpdateInfo(updateInfo *ecsacs.UpdateInfo) error {
if updateInfo == nil {
return errors.New("no update info given")
}
if updateInfo.Location == nil {
return errors.New("no location given")
}
if updateInfo.Signature == nil {
return errors.New("no signature given")
}
return locationValidation(*updateInfo.Location)
}
const validUpdateHost = "s3.amazonaws.com"
const validUpdateBucket = "amazon-ecs-agent"
// locationValidation validates that the update location points to the
// amazon-ecs-agent update bucket
func locationValidation(location string) error {
parsed, err := url.Parse(location)
if err != nil {
return err
}
if parsed.Host != validUpdateHost {
return errors.New("invalid update host")
}
if !strings.HasPrefix(parsed.Path, "/"+validUpdateBucket+"/") {
return errors.New("invalid update bucket")
}
return nil
}