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AWS: check validity of KSM key before creating a new encrypted disk. 

AWS CreateVolume call does not check if referenced encryption key actually
exists and returns a valid new AWS EBS volume even though an invalid key
was specified. Later on it removes the EBS silently when its encryption fails.

To work around this buggy behavior we manually check that the key exists
before calling CreateVolume.
pull/6/head
Jan Safranek 2017-08-28 12:52:57 +02:00
parent daf591c193
commit 1ea7fa84fc
9 changed files with 7371 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Godeps/Godeps.json generated
View File

@ -306,6 +306,11 @@
"Comment": "v1.6.10",
"Rev": "63ce630574a5ec05ecd8e8de5cea16332a5a684d"
},
{
"ImportPath": "github.com/aws/aws-sdk-go/service/kms",
"Comment": "v1.6.10",
"Rev": "63ce630574a5ec05ecd8e8de5cea16332a5a684d"
},
{
"ImportPath": "github.com/aws/aws-sdk-go/service/route53",
"Comment": "v1.6.10",

210
Godeps/LICENSES generated
View File

@ -8112,6 +8112,216 @@ SOFTWARE.
================================================================================
================================================================================
= vendor/github.com/aws/aws-sdk-go/service/kms licensed under: =
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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= vendor/github.com/aws/aws-sdk-go/LICENSE.txt 3b83ef96387f14655fc854ddc3c6bd57 -
================================================================================
================================================================================
= vendor/github.com/aws/aws-sdk-go/service/route53 licensed under: =

2
pkg/cloudprovider/providers/aws/BUILD
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@ -41,6 +41,7 @@ go_library(
"//vendor/github.com/aws/aws-sdk-go/service/autoscaling:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/service/ec2:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/service/elb:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/service/kms:go_default_library",
"//vendor/github.com/golang/glog:go_default_library",
"//vendor/github.com/prometheus/client_golang/prometheus:go_default_library",
"//vendor/gopkg.in/gcfg.v1:go_default_library",
@ -69,6 +70,7 @@ go_test(
"//vendor/github.com/aws/aws-sdk-go/service/autoscaling:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/service/ec2:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/service/elb:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/service/kms:go_default_library",
"//vendor/github.com/golang/glog:go_default_library",
"//vendor/github.com/stretchr/testify/assert:go_default_library",
"//vendor/github.com/stretchr/testify/mock:go_default_library",

54
pkg/cloudprovider/providers/aws/aws.go
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@ -38,6 +38,7 @@ import (
"github.com/aws/aws-sdk-go/service/autoscaling"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/aws/aws-sdk-go/service/elb"
"github.com/aws/aws-sdk-go/service/kms"
"github.com/golang/glog"
"github.com/prometheus/client_golang/prometheus"
@ -203,6 +204,7 @@ type Services interface {
LoadBalancing(region string) (ELB, error)
Autoscaling(region string) (ASG, error)
Metadata() (EC2Metadata, error)
KeyManagement(region string) (KMS, error)
}
// EC2 is an abstraction over AWS', to allow mocking/other implementations
@ -273,6 +275,12 @@ type ASG interface {
DescribeAutoScalingGroups(*autoscaling.DescribeAutoScalingGroupsInput) (*autoscaling.DescribeAutoScalingGroupsOutput, error)
}
// KMS is a simple pass-through of the Key Management Service client interface,
// which allows for testing.
type KMS interface {
DescribeKey(*kms.DescribeKeyInput) (*kms.DescribeKeyOutput, error)
}
// EC2Metadata is an abstraction over the AWS metadata service.
type EC2Metadata interface {
// Query the EC2 metadata service (used to discover instance-id etc)
@ -370,6 +378,7 @@ type Cloud struct {
ec2 EC2
elb ELB
asg ASG
kms KMS
metadata EC2Metadata
cfg *CloudConfig
region string
@ -568,6 +577,20 @@ func (p *awsSDKProvider) Metadata() (EC2Metadata, error) {
return client, nil
}
func (p *awsSDKProvider) KeyManagement(regionName string) (KMS, error) {
awsConfig := &aws.Config{
Region: &regionName,
Credentials: p.creds,
}
awsConfig = awsConfig.WithCredentialsChainVerboseErrors(true)
kmsClient := kms.New(session.New(awsConfig))
p.addHandlers(regionName, &kmsClient.Handlers)
return kmsClient, nil
}
// stringPointerArray creates a slice of string pointers from a slice of strings
// Deprecated: consider using aws.StringSlice - but note the slightly different behaviour with a nil input
func stringPointerArray(orig []string) []*string {
@ -877,11 +900,17 @@ func newAWSCloud(config io.Reader, awsServices Services) (*Cloud, error) {
return nil, fmt.Errorf("error creating AWS autoscaling client: %v", err)
}
kms, err := awsServices.KeyManagement(regionName)
if err != nil {
return nil, fmt.Errorf("error creating AWS key management client: %v", err)
}
awsCloud := &Cloud{
ec2: ec2,
elb: elb,
asg: asg,
metadata: metadata,
kms: kms,
cfg: cfg,
region: regionName,
@ -1788,6 +1817,14 @@ func (c *Cloud) CreateDisk(volumeOptions *VolumeOptions) (KubernetesVolumeID, er
request.VolumeType = aws.String(createType)
request.Encrypted = aws.Bool(volumeOptions.Encrypted)
if len(volumeOptions.KmsKeyId) > 0 {
if missing, err := c.checkEncryptionKey(volumeOptions.KmsKeyId); err != nil {
if missing {
// KSM key is missing, provisioning would fail
return "", err
}
// Log checkEncryptionKey error and try provisioning anyway.
glog.Warningf("Cannot check KSM key %s: %v", volumeOptions.KmsKeyId, err)
}
request.KmsKeyId = aws.String(volumeOptions.KmsKeyId)
request.Encrypted = aws.Bool(true)
}
@ -1819,6 +1856,23 @@ func (c *Cloud) CreateDisk(volumeOptions *VolumeOptions) (KubernetesVolumeID, er
return volumeName, nil
}
// checkEncryptionKey tests that given encryption key exists.
func (c *Cloud) checkEncryptionKey(keyId string) (missing bool, err error) {
input := &kms.DescribeKeyInput{
KeyId: aws.String(keyId),
}
_, err = c.kms.DescribeKey(input)
if err == nil {
return false, nil
}
if awsError, ok := err.(awserr.Error); ok {
if awsError.Code() == "NotFoundException" {
return true, fmt.Errorf("KMS key %s not found: %q", keyId, err)
}
}
return false, fmt.Errorf("Error checking KSM key %s: %q", keyId, err)
}
// DeleteDisk implements Volumes.DeleteDisk
func (c *Cloud) DeleteDisk(volumeName KubernetesVolumeID) (bool, error) {
awsDisk, err := newAWSDisk(c, volumeName)

16
pkg/cloudprovider/providers/aws/aws_test.go
View File

@ -26,6 +26,7 @@ import (
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/aws/aws-sdk-go/service/elb"
"github.com/aws/aws-sdk-go/service/kms"
"github.com/aws/aws-sdk-go/service/autoscaling"
"github.com/golang/glog"
@ -123,6 +124,7 @@ type FakeAWSServices struct {
elb *FakeELB
asg *FakeASG
metadata *FakeMetadata
kms *FakeKMS
}
func NewFakeAWSServices() *FakeAWSServices {
@ -132,6 +134,7 @@ func NewFakeAWSServices() *FakeAWSServices {
s.elb = &FakeELB{aws: s}
s.asg = &FakeASG{aws: s}
s.metadata = &FakeMetadata{aws: s}
s.kms = &FakeKMS{aws: s}
s.networkInterfacesMacs = []string{"aa:bb:cc:dd:ee:00", "aa:bb:cc:dd:ee:01"}
s.networkInterfacesVpcIDs = []string{"vpc-mac0", "vpc-mac1"}
@ -179,6 +182,10 @@ func (s *FakeAWSServices) Metadata() (EC2Metadata, error) {
return s.metadata, nil
}
func (s *FakeAWSServices) KeyManagement(region string) (KMS, error) {
return s.kms, nil
}
func TestNewAWSCloud(t *testing.T) {
tests := []struct {
name string
@ -511,6 +518,15 @@ func (a *FakeASG) DescribeAutoScalingGroups(*autoscaling.DescribeAutoScalingGrou
panic("Not implemented")
}
type FakeKMS struct {
aws *FakeAWSServices
mock.Mock
}
func (kms *FakeKMS) DescribeKey(*kms.DescribeKeyInput) (*kms.DescribeKeyOutput, error) {
panic("Not implemented")
}
func mockInstancesResp(selfInstance *ec2.Instance, instances []*ec2.Instance) (*Cloud, *FakeAWSServices) {
awsServices := NewFakeAWSServices()
awsServices.instances = instances

1
vendor/BUILD vendored
View File

@ -38,6 +38,7 @@ filegroup(
"//vendor/github.com/aws/aws-sdk-go/service/ec2:all-srcs",
"//vendor/github.com/aws/aws-sdk-go/service/ecr:all-srcs",
"//vendor/github.com/aws/aws-sdk-go/service/elb:all-srcs",
"//vendor/github.com/aws/aws-sdk-go/service/kms:all-srcs",
"//vendor/github.com/aws/aws-sdk-go/service/route53:all-srcs",
"//vendor/github.com/aws/aws-sdk-go/service/sts:all-srcs",
"//vendor/github.com/beorn7/perks/quantile:all-srcs",

34
vendor/github.com/aws/aws-sdk-go/service/kms/BUILD generated vendored Normal file
View File

@ -0,0 +1,34 @@
load("@io_bazel_rules_go//go:def.bzl", "go_library")
go_library(
name = "go_default_library",
srcs = [
"api.go",
"service.go",
],
visibility = ["//visibility:public"],
deps = [
"//vendor/github.com/aws/aws-sdk-go/aws:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/aws/awsutil:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/aws/client:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/aws/client/metadata:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/aws/request:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/aws/signer/v4:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/private/protocol:go_default_library",
"//vendor/github.com/aws/aws-sdk-go/private/protocol/jsonrpc:go_default_library",
],
)
filegroup(
name = "package-srcs",
srcs = glob(["**"]),
tags = ["automanaged"],
visibility = ["//visibility:private"],
)
filegroup(
name = "all-srcs",
srcs = [":package-srcs"],
tags = ["automanaged"],
visibility = ["//visibility:public"],
)

6886
vendor/github.com/aws/aws-sdk-go/service/kms/api.go generated vendored Normal file
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File diff suppressed because it is too large Load Diff

163
vendor/github.com/aws/aws-sdk-go/service/kms/service.go generated vendored Normal file
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@ -0,0 +1,163 @@
// THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT.
package kms
import (
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/client"
"github.com/aws/aws-sdk-go/aws/client/metadata"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/signer/v4"
"github.com/aws/aws-sdk-go/private/protocol/jsonrpc"
)
// AWS Key Management Service (AWS KMS) is an encryption and key management
// web service. This guide describes the AWS KMS operations that you can call
// programmatically. For general information about AWS KMS, see the AWS Key
// Management Service Developer Guide (http://docs.aws.amazon.com/kms/latest/developerguide/).
//
// AWS provides SDKs that consist of libraries and sample code for various programming
// languages and platforms (Java, Ruby, .Net, iOS, Android, etc.). The SDKs
// provide a convenient way to create programmatic access to AWS KMS and other
// AWS services. For example, the SDKs take care of tasks such as signing requests
// (see below), managing errors, and retrying requests automatically. For more
// information about the AWS SDKs, including how to download and install them,
// see Tools for Amazon Web Services (http://aws.amazon.com/tools/).
//
// We recommend that you use the AWS SDKs to make programmatic API calls to
// AWS KMS.
//
// Clients must support TLS (Transport Layer Security) 1.0. We recommend TLS
// 1.2. Clients must also support cipher suites with Perfect Forward Secrecy
// (PFS) such as Ephemeral Diffie-Hellman (DHE) or Elliptic Curve Ephemeral
// Diffie-Hellman (ECDHE). Most modern systems such as Java 7 and later support
// these modes.
//
// Signing Requests
//
// Requests must be signed by using an access key ID and a secret access key.
// We strongly recommend that you do not use your AWS account (root) access
// key ID and secret key for everyday work with AWS KMS. Instead, use the access
// key ID and secret access key for an IAM user, or you can use the AWS Security
// Token Service to generate temporary security credentials that you can use
// to sign requests.
//
// All AWS KMS operations require Signature Version 4 (http://docs.aws.amazon.com/general/latest/gr/signature-version-4.html).
//
// Logging API Requests
//
// AWS KMS supports AWS CloudTrail, a service that logs AWS API calls and related
// events for your AWS account and delivers them to an Amazon S3 bucket that
// you specify. By using the information collected by CloudTrail, you can determine
// what requests were made to AWS KMS, who made the request, when it was made,
// and so on. To learn more about CloudTrail, including how to turn it on and
// find your log files, see the AWS CloudTrail User Guide (http://docs.aws.amazon.com/awscloudtrail/latest/userguide/).
//
// Additional Resources
//
// For more information about credentials and request signing, see the following:
//
// * AWS Security Credentials (http://docs.aws.amazon.com/general/latest/gr/aws-security-credentials.html)
// - This topic provides general information about the types of credentials
// used for accessing AWS.
//
// * Temporary Security Credentials (http://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_temp.html)
// - This section of the IAM User Guide describes how to create and use temporary
// security credentials.
//
// * Signature Version 4 Signing Process (http://docs.aws.amazon.com/general/latest/gr/signature-version-4.html)
// - This set of topics walks you through the process of signing a request
// using an access key ID and a secret access key.
//
// Commonly Used APIs
//
// Of the APIs discussed in this guide, the following will prove the most useful
// for most applications. You will likely perform actions other than these,
// such as creating keys and assigning policies, by using the console.
//
// * Encrypt
//
// * Decrypt
//
// * GenerateDataKey
//
// * GenerateDataKeyWithoutPlaintext
// The service client's operations are safe to be used concurrently.
// It is not safe to mutate any of the client's properties though.
// Please also see https://docs.aws.amazon.com/goto/WebAPI/kms-2014-11-01
type KMS struct {
*client.Client
}
// Used for custom client initialization logic
var initClient func(*client.Client)
// Used for custom request initialization logic
var initRequest func(*request.Request)
// Service information constants
const (
ServiceName = "kms" // Service endpoint prefix API calls made to.
EndpointsID = ServiceName // Service ID for Regions and Endpoints metadata.
)
// New creates a new instance of the KMS client with a session.
// If additional configuration is needed for the client instance use the optional
// aws.Config parameter to add your extra config.
//
// Example:
// // Create a KMS client from just a session.
// svc := kms.New(mySession)
//
// // Create a KMS client with additional configuration
// svc := kms.New(mySession, aws.NewConfig().WithRegion("us-west-2"))
func New(p client.ConfigProvider, cfgs ...*aws.Config) *KMS {
c := p.ClientConfig(EndpointsID, cfgs...)
return newClient(*c.Config, c.Handlers, c.Endpoint, c.SigningRegion, c.SigningName)
}
// newClient creates, initializes and returns a new service client instance.
func newClient(cfg aws.Config, handlers request.Handlers, endpoint, signingRegion, signingName string) *KMS {
svc := &KMS{
Client: client.New(
cfg,
metadata.ClientInfo{
ServiceName: ServiceName,
SigningName: signingName,
SigningRegion: signingRegion,
Endpoint: endpoint,
APIVersion: "2014-11-01",
JSONVersion: "1.1",
TargetPrefix: "TrentService",
},
handlers,
),
}
// Handlers
svc.Handlers.Sign.PushBackNamed(v4.SignRequestHandler)
svc.Handlers.Build.PushBackNamed(jsonrpc.BuildHandler)
svc.Handlers.Unmarshal.PushBackNamed(jsonrpc.UnmarshalHandler)
svc.Handlers.UnmarshalMeta.PushBackNamed(jsonrpc.UnmarshalMetaHandler)
svc.Handlers.UnmarshalError.PushBackNamed(jsonrpc.UnmarshalErrorHandler)
// Run custom client initialization if present
if initClient != nil {
initClient(svc.Client)
}
return svc
}
// newRequest creates a new request for a KMS operation and runs any
// custom request initialization.
func (c *KMS) newRequest(op *request.Operation, params, data interface{}) *request.Request {
req := c.NewRequest(op, params, data)
// Run custom request initialization if present
if initRequest != nil {
initRequest(req)
}
return req
}