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cloudfront.go
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cloudfront.go
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package certutils
import (
"fmt"
"os"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudfront"
"github.com/aws/aws-sdk-go/service/iam"
"github.com/olekukonko/tablewriter"
)
type CloudFront struct {
client *cloudfront.CloudFront
iamClient *IAM
marker string
maxItems int64
}
type CFDistribution struct {
id string
domain string
cert string
aliasesStr string
aliases []string
}
func NewCloudFront(sess *session.Session, marker string, maxItems int64) *CloudFront {
return &CloudFront{
client: cloudfront.New(sess),
iamClient: &IAM{
client: iam.New(sess),
},
marker: marker,
maxItems: int64(maxItems),
}
}
func createCFListDistributionsInput(marker string, maxItems int64) *cloudfront.ListDistributionsInput {
dinput := &cloudfront.ListDistributionsInput{}
if marker != "" {
dinput.SetMarker(marker)
}
if maxItems > 0 {
dinput.SetMaxItems(int64(maxItems))
}
return dinput
}
func (cf *CloudFront) getDistributions(certFilter, aliasesFilter string) ([]CFDistribution, error) {
out, err := cf.client.ListDistributions(createCFListDistributionsInput(cf.marker, cf.maxItems))
if err != nil {
return []CFDistribution{}, err
}
iamDescs, err := cf.iamClient.ListMap("", int64(0), "")
if err != nil {
return []CFDistribution{}, err
}
dists := make([]CFDistribution, 0, len(out.DistributionList.Items))
for _, summary := range out.DistributionList.Items {
dist := CFDistribution{}
vCert := summary.ViewerCertificate
var iamCert string
if aws.StringValue(vCert.ACMCertificateArn) != "" {
dist.cert = *vCert.ACMCertificateArn
} else if aws.StringValue(vCert.IAMCertificateId) != "" {
dist.cert = *vCert.IAMCertificateId
iamCert = fmt.Sprintf("%s | %s", *vCert.IAMCertificateId, iamDescs[*vCert.IAMCertificateId].name)
} else {
continue
}
if certFilter != "" && dist.cert != certFilter {
continue
}
if iamCert != "" {
dist.cert = iamCert
}
aliases := summary.Aliases.Items
if len(aliases) > 0 {
dist.aliases = aws.StringValueSlice(aliases)
dist.aliasesStr = toFlatten(aliases)
}
if aliasesFilter != "" && (dist.aliasesStr == "" || strings.Index(dist.aliasesStr, aliasesFilter) < 0) {
continue
}
dist.id = *summary.Id
dist.domain = *summary.DomainName
dists = append(dists, dist)
}
return dists, err
}
func (cf *CloudFront) List(certFilter, aliasesFilter string) ([]CFDistribution, error) {
return cf.getDistributions(certFilter, aliasesFilter)
}
func createCFDistributionConfig(vc *cloudfront.ViewerCertificate) *cloudfront.DistributionConfig {
dc := &cloudfront.DistributionConfig{}
dc.SetViewerCertificate(vc)
return dc
}
func createCFViewerCertificate(vc *cloudfront.ViewerCertificate, service, cert string) *cloudfront.ViewerCertificate {
newvc := &cloudfront.ViewerCertificate{}
switch service {
case "acm":
newvc.SetACMCertificateArn(cert)
case "iam":
newvc.SetIAMCertificateId(cert)
}
newvc.SetCloudFrontDefaultCertificate(false)
newvc.SetMinimumProtocolVersion(*vc.MinimumProtocolVersion)
newvc.SetSSLSupportMethod(*vc.SSLSupportMethod)
return newvc
}
func createCFUpdateDistributionInput(distOut *cloudfront.GetDistributionOutput, service, cert string) *cloudfront.UpdateDistributionInput {
dinput := &cloudfront.UpdateDistributionInput{}
dist := distOut.Distribution
dinput.SetId(*dist.Id)
dinput.SetIfMatch(*distOut.ETag)
dc := dist.DistributionConfig
vc := dc.ViewerCertificate
newvc := createCFViewerCertificate(vc, service, cert)
dc.SetViewerCertificate(newvc)
dinput.SetDistributionConfig(dc)
return dinput
}
func createGetDistributionInput(id string) *cloudfront.GetDistributionInput {
dinput := &cloudfront.GetDistributionInput{}
dinput.SetId(id)
return dinput
}
func (cf *CloudFront) GetDistribution(id string) (*cloudfront.GetDistributionOutput, error) {
return cf.client.GetDistribution(createGetDistributionInput(id))
}
func getCertificate(vc *cloudfront.ViewerCertificate) string {
if aws.StringValue(vc.ACMCertificateArn) != "" {
return aws.StringValue(vc.ACMCertificateArn)
}
if aws.StringValue(vc.IAMCertificateId) != "" {
return aws.StringValue(vc.IAMCertificateId)
}
return ""
}
func (cf *CloudFront) Update(id, service, cert string) (string, error) {
distOut, err := cf.GetDistribution(id)
if err != nil {
return "", err
}
srcCert := getCertificate(distOut.Distribution.DistributionConfig.ViewerCertificate)
_, err = cf.client.UpdateDistribution(createCFUpdateDistributionInput(distOut, service, cert))
if err != nil {
return "", err
}
aliases := toFlatten(distOut.Distribution.DistributionConfig.Aliases.Items)
return cfUpdateMsg(id, aliases, srcCert, cert), nil
}
func cfUpdateMsg(id, aliases, src, dest string) string {
return fmt.Sprintf("Updated %s %s %s -> %s", id, aliases, src, dest)
}
func (cf *CloudFront) BulkUpdate(service, srcCert, destCert string, dryRun bool) ([]string, error) {
dists, err := cf.getDistributions(srcCert, "")
if err != nil {
return []string{}, err
}
updates := make([]string, 0)
if dryRun {
updates = append(updates, dryRunMsg()...)
}
for _, dist := range dists {
if dryRun {
updates = append(updates, cfUpdateMsg(dist.id, dist.aliasesStr, srcCert, destCert))
} else {
distOut, err := cf.GetDistribution(dist.id)
if err != nil {
return []string{}, err
}
_, err = cf.client.UpdateDistribution(createCFUpdateDistributionInput(distOut, service, destCert))
if err != nil {
return []string{}, err
}
updates = append(updates, cfUpdateMsg(dist.id, dist.aliasesStr, srcCert, destCert))
}
}
return updates, nil
}
func (cf *CloudFront) ReadableList(dists []CFDistribution) {
table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Distribution ID", "Aliases", "SSL Certificate"})
table.SetAutoMergeCells(true)
table.SetRowLine(true)
for _, dist := range dists {
for _, alias := range dist.aliases {
table.Append([]string{dist.id, alias, dist.cert})
}
}
table.Render()
}