/
gencert.go
186 lines (157 loc) · 5.48 KB
/
gencert.go
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package cmd
import (
"fmt"
"io/ioutil"
"os"
"strings"
"time"
"github.com/certonid/certonid/utils"
"github.com/rs/zerolog/log"
"github.com/spf13/cobra"
"golang.org/x/crypto/ssh"
)
var (
genAwsProfile string
genAwsRegion string
genAwsFuncName string
genCertCertName string
genSkipCertCache bool
genCertRunner string
genCertTimeout int
genCertPath string
genCertType string
genPublicKeyPath string
genUsername string
genHostnames string
genValidUntil string
genAddToSSHAgent string
genKMSAuthCachePath string
genKMSAuthKeyID string
genKMSAuthServiceID string
genKMSAuthTokenValidUntil string
genFailoverVariants []FailoverSchema
gencertCmd = &cobra.Command{
Use: "gencert [OPTIONS] [KEY NAME]",
Short: "Generate user or host certificate",
Long: `Generate user or host certificate by invoking serverless function`,
Run: func(cmd *cobra.Command, args []string) {
var (
kmsauthToken string
certBytes []byte
serverlessErr error
)
if len(args) > 0 && args[0] != "" {
genCertCertName = args[0]
}
genValidateOptions()
if len(genPublicKeyPath) == 0 {
er("You need to provide public key for key sign")
}
if len(genCertPath) == 0 {
er("You need to provide certificate path")
}
if genCertType == utils.HostCertType && len(genHostnames) == 0 {
er("You need to hostnames for certificate")
} else if len(genUsername) == 0 {
er("You need to username for certificate")
}
isFresh, cachedCert := genIsCertValidInCache()
if !genSkipCertCache && isFresh {
genPostScripts(cachedCert)
// exit from program
os.Exit(0)
}
log.Info().
Str("runner", genCertRunner).
Str("public_key", genPublicKeyPath).
Str("certificate", genCertPath).
Msg("Signing public key")
publicKeyData, err := ioutil.ReadFile(genPublicKeyPath)
if err != nil {
er(fmt.Errorf("Error to read public key: %w", err))
}
switch strings.ToLower(genCertRunner) {
case "gcloud":
// TODO
default: // aws
// kmsauth for aws
if genCertType != utils.HostCertType && len(genKMSAuthKeyID) != 0 && len(genKMSAuthServiceID) != 0 {
kmsauthToken, err = GenerateAwsKMSAuthToken(
genKMSAuthKeyID,
genKMSAuthServiceID,
genKMSAuthTokenValidUntil,
genAwsProfile,
genAwsRegion,
false,
)
if err != nil {
er(err)
}
}
certBytes, serverlessErr = genCertFromAws(
genAwsProfile,
genAwsRegion,
genAwsFuncName,
publicKeyData,
kmsauthToken,
genCertTimeout,
)
if serverlessErr != nil {
if len(genFailoverVariants) > 0 {
log.Warn().
Err(serverlessErr).
Msg("Error to generate certificate. Switching to failover")
certBytes, serverlessErr = genCertAWSFailover(publicKeyData)
if serverlessErr != nil {
er(serverlessErr)
}
} else {
er(serverlessErr)
}
}
}
err = genStoreCertAtFile(genCertPath, certBytes)
if err != nil {
er(err)
}
cert, err := genParseCertificate(certBytes)
if err != nil {
er(err)
}
log.Info().
Str("public_key", genPublicKeyPath).
Str("certificate", genCertPath).
Time("valid_until", time.Unix(int64(cert.ValidBefore), 0).UTC()).
Msg("Certificate generated and stored")
genPostScripts(cert)
},
}
)
func genPostScripts(cert *ssh.Certificate) {
if len(genAddToSSHAgent) > 0 {
genAddCertToAgent(cert)
}
}
func init() {
rootCmd.AddCommand(gencertCmd)
gencertCmd.Flags().StringVarP(&genCertRunner, "runner", "r", "", "Serverless runner (aws, gcloud, etc)")
gencertCmd.Flags().IntVar(&genCertTimeout, "timeout", 0, "Timeout for serverless function (seconds)")
gencertCmd.Flags().StringVarP(&genCertType, "type", "t", "user", "Certificate type (user, host)")
gencertCmd.Flags().StringVarP(&genPublicKeyPath, "public-key-path", "p", "", "Path to public file, which will used for certificate")
gencertCmd.Flags().StringVarP(&genCertPath, "certificate-path", "o", "", "Path to cerrtificate file")
gencertCmd.Flags().StringVarP(&genUsername, "username", "u", "", "Username for certificate")
gencertCmd.Flags().BoolVar(&genSkipCertCache, "skip-cache", false, "Skip certificate in cache and run serverless function")
gencertCmd.Flags().StringVar(&genCertCertName, "key-name", "", "Certificate name")
gencertCmd.Flags().StringVar(&genHostnames, "hostnames", "", "Hostnames for certificate (use comma as divider)")
gencertCmd.Flags().StringVar(&genValidUntil, "valid-until", "", "TTL for certificate")
gencertCmd.Flags().StringVar(&genAddToSSHAgent, "add-to-ssh-agent", "", "Private key path, which will added with certificate to ssh-agent")
// aws
gencertCmd.Flags().StringVar(&genAwsProfile, "aws-lambda-profile", "", "AWS Lambda Profile")
gencertCmd.Flags().StringVar(&genAwsRegion, "aws-lambda-region", "", "AWS Lambda Region")
gencertCmd.Flags().StringVar(&genAwsFuncName, "aws-lambda-func-name", "", "AWS Lambda Function name")
// kmsauth
gencertCmd.Flags().StringVar(&genKMSAuthCachePath, "kmsauth-cache-path", "", "Path to KMSAuth cached token")
gencertCmd.Flags().StringVar(&genKMSAuthKeyID, "kmsauth-key-id", "", "KMSAuth key ID")
gencertCmd.Flags().StringVar(&genKMSAuthServiceID, "kmsauth-service-id", "", "KMSAuth service ID")
gencertCmd.Flags().StringVar(&genKMSAuthTokenValidUntil, "kmsauth-token-ttl", "", "KMSAuth token TTL")
}