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certificate.go
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certificate.go
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package main
import (
"encoding/json"
"io/ioutil"
"net/http"
"os"
"github.com/krystal/go-runner"
"github.com/rs/zerolog"
)
func (c *Certificate) Process(logger zerolog.Logger) (bool, error) {
logger.Info().Str("url", c.URL).Msgf("Getting certificate metadata")
metadata, err := c.getMetadata(logger)
if err != nil {
logger.Error().Str("url", c.URL).Err(err).Msg("Could not get metadata ")
return false, err
}
requiresUpdate, err := c.requiresUpdate(metadata)
if err != nil {
return false, err
}
if !requiresUpdate {
logger.Info().Msg("No update needed at this time")
return false, nil
}
if c.Paths.Certificate == "" {
logger.Info().Msg("Not saving certificate file because no path defined")
} else {
err = os.WriteFile(c.Paths.Certificate, []byte(metadata.Files.Certificate), c.Permissions.CertificatesFileMode())
if err != nil {
logger.Error().Err(err).Str("path", c.Paths.Certificate).Msg("Failed to write certificate file")
return true, err
}
logger.Info().Str("path", c.Paths.Certificate).Msg("Certificate file saved")
err = os.Chmod(c.Paths.Certificate, c.Permissions.CertificatesFileMode())
if err != nil {
logger.Error().Err(err).Str("path", c.Paths.Certificate).Msg("Failed to set permissions for certificate file")
return true, err
}
}
if c.Paths.PrivateKey == "" {
logger.Info().Msg("Not saving private key file because no path defined")
} else {
err = os.WriteFile(c.Paths.PrivateKey, []byte(metadata.Files.PrivateKey), c.Permissions.KeysFileMode())
if err != nil {
logger.Error().Err(err).Str("path", c.Paths.PrivateKey).Msg("Failed to write private key file")
return true, err
}
logger.Info().Str("path", c.Paths.PrivateKey).Msg("Private key file saved")
err = os.Chmod(c.Paths.PrivateKey, c.Permissions.KeysFileMode())
if err != nil {
logger.Error().Err(err).Str("path", c.Paths.PrivateKey).Msg("Failed to set permissions for private key file")
return true, err
}
}
if c.Paths.Chain == "" {
logger.Info().Msg("Not saving chain file because no path defined")
} else {
if metadata.Files.Chain == "" {
logger.Info().Msg("No chain file provided")
} else {
err = os.WriteFile(c.Paths.Chain, []byte(metadata.Files.Chain), c.Permissions.CertificatesFileMode())
if err != nil {
logger.Error().Err(err).Str("path", c.Paths.Chain).Msg("Failed to write chain file")
return true, err
}
logger.Info().Str("path", c.Paths.Chain).Msg("Chain file saved")
err = os.Chmod(c.Paths.Chain, c.Permissions.CertificatesFileMode())
if err != nil {
logger.Error().Err(err).Str("path", c.Paths.Chain).Msg("Failed to set permissions for chain file")
return true, err
}
}
}
if c.Paths.CertificateWithChain == "" {
logger.Info().Msg("Not saving certificate with chain file because no path defined")
} else {
err = os.WriteFile(c.Paths.CertificateWithChain, []byte(metadata.Files.CertificateWithChain()), c.Permissions.CertificatesFileMode())
if err != nil {
logger.Error().Err(err).Str("path", c.Paths.CertificateWithChain).Msg("Failed to write certificate with chain file")
return true, err
}
logger.Info().Str("path", c.Paths.PrivateKey).Msg("Certificate with chain file saved")
err = os.Chmod(c.Paths.CertificateWithChain, c.Permissions.CertificatesFileMode())
if err != nil {
logger.Error().Err(err).Str("path", c.Paths.CertificateWithChain).Msg("Failed to set permissions for certificate with chain file")
return true, err
}
}
err = c.runCommands(logger)
if err != nil {
return true, err
}
return true, nil
}
func (c *Certificate) runCommands(logger zerolog.Logger) error {
for _, command := range c.Commands {
logger.Info().Str("command", command).Msg("Running command")
runner := runner.New()
err := runner.Run(nil, logger, logger, "sh", "-c", command)
if err != nil {
logger.Error().Err(err).Msg("Failed to run command")
return err
}
}
return nil
}
// requiresUpdate returns whether or not we need to perform an update based on the
// metadata given.
func (c *Certificate) requiresUpdate(metadata *CertificateMetadata) (bool, error) {
if c.Paths.Certificate != "" {
certificateFileMatches, err := fileMatches(c.Paths.Certificate, metadata.Files.Certificate)
if err != nil {
return false, err
}
if !certificateFileMatches {
return true, nil
}
}
if c.Paths.PrivateKey != "" {
privateKeyFileMatches, err := fileMatches(c.Paths.PrivateKey, metadata.Files.PrivateKey)
if err != nil {
return false, err
}
if !privateKeyFileMatches {
// If certificate file does not match, we need to update
return true, nil
}
}
if c.Paths.Chain != "" {
chainFileMatches, err := fileMatches(c.Paths.Chain, metadata.Files.Chain)
if err != nil {
return false, err
}
if !chainFileMatches {
// If certificate file does not match, we need to update
return true, nil
}
}
if c.Paths.CertificateWithChain != "" {
certificateWithChainFileMatches, err := fileMatches(c.Paths.CertificateWithChain, metadata.Files.CertificateWithChain())
if err != nil {
return false, err
}
if !certificateWithChainFileMatches {
// If certificate file does not match, we need to update
return true, nil
}
}
return false, nil
}
// getMetadata will return the remote metadata for the certificate.
func (c *Certificate) getMetadata(logger zerolog.Logger) (*CertificateMetadata, error) {
resp, err := http.Get(c.URL)
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
metadata := &CertificateMetadata{}
err = json.Unmarshal(body, metadata)
if err != nil {
return nil, err
}
logger.Info().Str("cert-id", metadata.ID).Msg("Certificate metadata retrieved")
metadata.Files.getAll(logger)
return metadata, nil
}