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issue.go
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issue.go
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package cli
import (
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"github.com/giantswarm/microerror"
vaultclient "github.com/hashicorp/vault/api"
"github.com/spf13/cobra"
certsigner "github.com/giantswarm/certctl/service/cert-signer"
"github.com/giantswarm/certctl/service/spec"
vaultfactory "github.com/giantswarm/certctl/service/vault-factory"
)
type issueFlags struct {
VaultAddress string
VaultToken string
VaultTLS *vaultclient.TLSConfig
// Cluster
ClusterID string
// Certificate
CommonName string
IPSANs string
AltNames string
TTL string
Organizations string
AllowedDomains string
AllowBareDomains bool
RoleTTL string
// Path
CrtFilePath string
KeyFilePath string
CAFilePath string
}
var (
issueCmd = &cobra.Command{
Use: "issue",
Short: "Generate signed certificates for a specific cluster.",
Run: issueRun,
}
newIssueFlags = &issueFlags{
VaultTLS: &vaultclient.TLSConfig{},
}
)
func init() {
CLICmd.AddCommand(issueCmd)
issueCmd.Flags().StringVar(&newIssueFlags.VaultAddress, "vault-addr", fromEnvToString(EnvVaultAddress, "http://127.0.0.1:8200"), "Address used to connect to Vault.")
issueCmd.Flags().StringVar(&newIssueFlags.VaultToken, "vault-token", fromEnvToString(EnvVaultToken, ""), "Token used to authenticate against Vault.")
issueCmd.Flags().StringVar(&newIssueFlags.VaultTLS.CACert, "vault-cacert", fromEnvToString(EnvVaultCACert, ""), "The path to a PEM-encoded CA cert file to use to verify the Vault server SSL certificate.")
issueCmd.Flags().StringVar(&newIssueFlags.VaultTLS.CAPath, "vault-capath", fromEnvToString(EnvVaultCAPath, ""), "The path to a directory of PEM-encoded CA cert files to verify the Vault server SSL certificate.")
issueCmd.Flags().StringVar(&newIssueFlags.VaultTLS.ClientCert, "vault-client-cert", fromEnvToString(EnvVaultClientCert, ""), "The path to the certificate for Vault communication.")
issueCmd.Flags().StringVar(&newIssueFlags.VaultTLS.ClientKey, "vault-client-key", fromEnvToString(EnvVaultClientKey, ""), "The path to the private key for Vault communication.")
issueCmd.Flags().StringVar(&newIssueFlags.VaultTLS.TLSServerName, "vault-tls-server-name", fromEnvToString(EnvVaultTLSServerName, ""), "If set, is used to set the SNI host when connecting via TLS.")
issueCmd.Flags().BoolVar(&newIssueFlags.VaultTLS.Insecure, "vault-tls-skip-verify", fromEnvBool(EnvVaultInsecure, false), "Do not verify TLS certificate.")
issueCmd.Flags().StringVar(&newIssueFlags.ClusterID, "cluster-id", "", "Cluster ID used to generate a new signed certificate for.")
issueCmd.Flags().StringVar(&newIssueFlags.CommonName, "common-name", "", "Common name used to generate a new signed certificate for.")
issueCmd.Flags().StringVar(&newIssueFlags.IPSANs, "ip-sans", "", "IPSANs used to generate a new signed certificate for.")
issueCmd.Flags().StringVar(&newIssueFlags.AltNames, "alt-names", "", "Alternative names used to generate a new signed certificate for.")
issueCmd.Flags().StringVar(&newIssueFlags.TTL, "ttl", "8640h", "TTL used to generate a new signed certificate for.") // 1 year
issueCmd.Flags().StringVar(&newIssueFlags.Organizations, "organizations", "", "Organizations that you want this new certificate to have in its subject.")
issueCmd.Flags().StringVar(&newIssueFlags.AllowedDomains, "allowed-domains", "", "Comma separated domains allowed to authenticate against the cluster's root CA.")
issueCmd.Flags().BoolVar(&newIssueFlags.AllowBareDomains, "allow-bare-domains", false, "Allow issuing certs for bare domains. (Default false)")
issueCmd.Flags().StringVar(&newIssueFlags.RoleTTL, "role-ttl", "8640h", "TTL used for the role that might get created (if it doesn't exist yet) while issuing this certificate.") // 1 year
issueCmd.Flags().StringVar(&newIssueFlags.CrtFilePath, "crt-file", "", "File path used to write the generated public key to.")
issueCmd.Flags().StringVar(&newIssueFlags.KeyFilePath, "key-file", "", "File path used to write the generated private key to.")
issueCmd.Flags().StringVar(&newIssueFlags.CAFilePath, "ca-file", "", "File path used to write the issuing root CA to.")
}
func issueValidate(newIssueFlags *issueFlags) error {
if newIssueFlags.VaultToken == "" {
return microerror.Maskf(invalidConfigError, "Vault token must not be empty")
}
if newIssueFlags.ClusterID == "" {
return microerror.Maskf(invalidConfigError, "cluster ID must not be empty")
}
if newIssueFlags.CommonName == "" {
return microerror.Maskf(invalidConfigError, "--common-name must not be empty")
}
if newIssueFlags.CrtFilePath == "" {
return microerror.Maskf(invalidConfigError, "--crt-file name must not be empty")
}
if newIssueFlags.KeyFilePath == "" {
return microerror.Maskf(invalidConfigError, "--key-file name must not be empty")
}
if newIssueFlags.CAFilePath == "" {
return microerror.Maskf(invalidConfigError, "--ca-file name must not be empty")
}
return nil
}
func issueRun(cmd *cobra.Command, args []string) {
err := issueValidate(newIssueFlags)
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
// Create a Vault client factory.
newVaultFactoryConfig := vaultfactory.DefaultConfig()
newVaultFactoryConfig.Address = newIssueFlags.VaultAddress
newVaultFactoryConfig.AdminToken = newIssueFlags.VaultToken
newVaultFactoryConfig.TLS = newIssueFlags.VaultTLS
newVaultFactory, err := vaultfactory.New(newVaultFactoryConfig)
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
// Create a Vault client and configure it with the provided admin token
// through the factory.
newVaultClient, err := newVaultFactory.NewClient()
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
// Create a certificate signer to generate a new signed certificate.
newCertSignerConfig := certsigner.DefaultConfig()
newCertSignerConfig.VaultClient = newVaultClient
newCertSigner, err := certsigner.New(newCertSignerConfig)
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
// Generate a new signed certificate.
newIssueConfig := spec.IssueConfig{
ClusterID: newIssueFlags.ClusterID,
CommonName: newIssueFlags.CommonName,
Organizations: newIssueFlags.Organizations,
AllowedDomains: newIssueFlags.AllowedDomains,
AllowBareDomains: newIssueFlags.AllowBareDomains,
IPSANs: newIssueFlags.IPSANs,
AltNames: newIssueFlags.AltNames,
TTL: newIssueFlags.TTL,
RoleTTL: newIssueFlags.RoleTTL,
}
newIssueResponse, err := newCertSigner.Issue(newIssueConfig)
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
err = os.MkdirAll(filepath.Dir(newIssueFlags.CrtFilePath), os.FileMode(0744))
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
err = ioutil.WriteFile(newIssueFlags.CrtFilePath, []byte(newIssueResponse.Certificate), os.FileMode(0644))
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
err = os.MkdirAll(filepath.Dir(newIssueFlags.KeyFilePath), os.FileMode(0744))
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
err = ioutil.WriteFile(newIssueFlags.KeyFilePath, []byte(newIssueResponse.PrivateKey), os.FileMode(0600))
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
err = os.MkdirAll(filepath.Dir(newIssueFlags.CAFilePath), os.FileMode(0744))
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
err = ioutil.WriteFile(newIssueFlags.CAFilePath, []byte(newIssueResponse.IssuingCA), os.FileMode(0644))
if err != nil {
log.Fatalf("%#v\n", microerror.Mask(err))
}
fmt.Printf("Issued new signed certificate with the following serial number.\n")
fmt.Printf("\n")
fmt.Printf(" %s\n", newIssueResponse.SerialNumber)
fmt.Printf("\n")
fmt.Printf("Public key written to '%s'.\n", newIssueFlags.CrtFilePath)
fmt.Printf("Private key written to '%s'.\n", newIssueFlags.KeyFilePath)
fmt.Printf("Root CA written to '%s'.\n", newIssueFlags.CAFilePath)
}