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util.go
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util.go
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package pki
import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"net"
"net/http"
"os"
"strconv"
"time"
"github.com/Venafi/vcert/v5"
"github.com/Venafi/vcert/v5/pkg/endpoint"
"github.com/Venafi/vcert/v5/pkg/venafi/tpp"
"github.com/hashicorp/vault/sdk/logical"
"github.com/Venafi/vault-pki-backend-venafi/plugin/pki/vpkierror"
"github.com/Venafi/vault-pki-backend-venafi/plugin/util"
)
const (
HTTP_UNAUTHORIZED = 401
LEGACY_PEM = "der"
)
type RunContext struct {
TPPurl string
TPPuser string
TPPPassword string
TPPZone string
CloudUrl string
CloudAPIkey string
CloudZone string
TokenUrl string
AccessToken string
TPPTestingEnabled bool
CloudTestingEnabled bool
FakeTestingEnabled bool
TokenTestingEnabled bool
TPPIssuerCN string
CloudIssuerCN string
FakeIssuerCN string
ClientId string
}
func GetContext() *RunContext {
c := RunContext{}
c.TPPurl = os.Getenv("TPP_URL")
c.TPPuser = os.Getenv("TPP_USER")
c.TPPPassword = os.Getenv("TPP_PASSWORD")
c.TPPZone = os.Getenv("TPP_ZONE")
c.CloudUrl = os.Getenv("CLOUD_URL")
c.CloudAPIkey = os.Getenv("CLOUD_APIKEY")
c.CloudZone = os.Getenv("CLOUD_ZONE")
c.TokenUrl = os.Getenv("TPP_TOKEN_URL")
c.AccessToken = os.Getenv("ACCESS_TOKEN")
c.ClientId = os.Getenv("TPP_CLIENT_ID")
c.TPPTestingEnabled, _ = strconv.ParseBool(os.Getenv("VENAFI_TPP_TESTING"))
c.CloudTestingEnabled, _ = strconv.ParseBool(os.Getenv("VENAFI_CLOUD_TESTING"))
c.FakeTestingEnabled, _ = strconv.ParseBool(os.Getenv("VENAFI_FAKE_TESTING"))
c.TokenTestingEnabled, _ = strconv.ParseBool(os.Getenv("VENAFI_TPP_TOKEN_TESTING"))
c.TPPIssuerCN = os.Getenv("TPP_ISSUER_CN")
c.CloudIssuerCN = os.Getenv("CLOUD_ISSUER_CN")
c.FakeIssuerCN = os.Getenv("FAKE_ISSUER_CN")
return &c
}
func getTppConnector(cfg *vcert.Config) (*tpp.Connector, error) {
var connectionTrustBundle *x509.CertPool
if cfg.ConnectionTrust != "" {
connectionTrustBundle = x509.NewCertPool()
if !connectionTrustBundle.AppendCertsFromPEM([]byte(cfg.ConnectionTrust)) {
return nil, fmt.Errorf("failed to parse PEM trust bundle")
}
}
tppConnector, err := tpp.NewConnector(cfg.BaseUrl, "", cfg.LogVerbose, connectionTrustBundle)
if err != nil {
return nil, fmt.Errorf("could not create TPP connector: %s", err)
}
return tppConnector, nil
}
func isTokenRefreshNeeded(b *backend, ctx context.Context, storage logical.Storage, secretName string) (bool, string, error) {
secretEntry, err := b.getVenafiSecret(ctx, storage, secretName)
if err != nil {
return false, "", err
}
return secretEntry.NextRefresh.Before(time.Now()), secretEntry.RefreshToken2, nil
}
func updateAccessToken(b *backend, ctx context.Context, req *logical.Request, cfg *vcert.Config, role *roleEntry) error {
b.mux.Lock()
defer b.mux.Unlock()
b.Logger().Info("Verifying again if token still needs refresh")
refreshNeeded, refreshToken, err := isTokenRefreshNeeded(b, ctx, req.Storage, role.VenafiSecret)
if err != nil {
return err
}
if !refreshNeeded {
b.Logger().Info("Refresh is not needed. Another process updated the tokens already")
return nil // we're done, another thread beat us to it
}
tppConnector, _ := getTppConnector(cfg)
var httpClient *http.Client
httpClient, err = getHTTPClient(cfg.ConnectionTrust)
if err != nil {
return err
}
tppConnector.SetHTTPClient(httpClient)
b.Logger().Info("Refreshing access_token")
var resp tpp.OauthRefreshAccessTokenResponse
resp, err = tppConnector.RefreshAccessToken(&endpoint.Authentication{
RefreshToken: refreshToken,
ClientId: cfg.Credentials.ClientId,
Scope: "certificate:manage,revoke",
})
if resp.Access_token != "" && resp.Refresh_token != "" {
b.Logger().Info("Storing new token")
err = storeAccessData(b, ctx, req, role, resp)
}
return err
}
func storeAccessData(b *backend, ctx context.Context, req *logical.Request, role *roleEntry, resp tpp.OauthRefreshAccessTokenResponse) error {
if role.VenafiSecret == "" {
return fmt.Errorf("Role " + role.Name + " does not have any Venafi secret associated")
}
venafiEntry, err := b.getVenafiSecret(ctx, req.Storage, role.VenafiSecret)
if err != nil {
return err
}
b.Logger().Info("swapping tokens")
venafiEntry.RefreshToken2 = venafiEntry.RefreshToken
b.Logger().Info("setting new access_token")
venafiEntry.AccessToken = resp.Access_token
b.Logger().Info("setting new refresh_token")
venafiEntry.RefreshToken = resp.Refresh_token
venafiEntry.NextRefresh = time.Now().Add(venafiEntry.RefreshInterval)
b.Logger().Info(fmt.Sprintf("Setting new time refresh: %s", venafiEntry.NextRefresh.String()))
// Store it
b.Logger().Info("preparing tokens for storage")
jsonEntry, err := logical.StorageEntryJSON(util.CredentialsRootPath+role.VenafiSecret, venafiEntry)
if err != nil {
b.Logger().Error("Error on creating new tokens into venafi secret:", err.Error())
return err
}
b.Logger().Info("storing new tokens")
if err := req.Storage.Put(ctx, jsonEntry); err != nil {
b.Logger().Error("Error on storing new tokens into Venafi secret:", err.Error())
return err
}
return nil
}
func getHTTPClient(trustBundlePem string) (*http.Client, error) {
var netTransport = &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
DualStack: true,
}).DialContext,
MaxIdleConns: 100,
IdleConnTimeout: 90 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * time.Second,
}
tlsConfig := http.DefaultTransport.(*http.Transport).TLSClientConfig
if tlsConfig == nil {
tlsConfig = &tls.Config{}
} else {
tlsConfig = tlsConfig.Clone()
}
/* #nosec */
if trustBundlePem != "" {
trustBundle, err := parseTrustBundlePEM(trustBundlePem)
if err != nil {
return nil, err
}
tlsConfig.RootCAs = trustBundle
}
tlsConfig.Renegotiation = tls.RenegotiateFreelyAsClient
netTransport.TLSClientConfig = tlsConfig
client := &http.Client{
Timeout: time.Second * 30,
Transport: netTransport,
}
return client, nil
}
func parseTrustBundlePEM(trustBundlePem string) (*x509.CertPool, error) {
var connectionTrustBundle *x509.CertPool
if trustBundlePem != "" {
connectionTrustBundle = x509.NewCertPool()
if !connectionTrustBundle.AppendCertsFromPEM([]byte(trustBundlePem)) {
return nil, fmt.Errorf("failed to parse PEM trust bundle")
}
} else {
return nil, fmt.Errorf("trust bundle PEM data is empty")
}
return connectionTrustBundle, nil
}
func createConfigFromFieldData(data *venafiSecretEntry) (*vcert.Config, error) {
cfg := &vcert.Config{}
cfg.BaseUrl = data.URL
cfg.Zone = data.Zone
cfg.LogVerbose = true
trustBundlePath := data.TrustBundleFile
if trustBundlePath != "" {
var trustBundlePEM string
trustBundle, err := ioutil.ReadFile(trustBundlePath)
if err != nil {
return cfg, err
}
trustBundlePEM = string(trustBundle)
cfg.ConnectionTrust = trustBundlePEM
}
cfg.ConnectorType = endpoint.ConnectorTypeTPP
cfg.Credentials = &endpoint.Authentication{
AccessToken: data.AccessToken,
RefreshToken: data.RefreshToken,
ClientId: data.ClientId,
}
return cfg, nil
}
func getAccessData(cfg *vcert.Config) (tpp.OauthRefreshAccessTokenResponse, error) {
var tokenInfoResponse tpp.OauthRefreshAccessTokenResponse
tppConnector, _ := getTppConnector(cfg)
httpClient, err := getHTTPClient(cfg.ConnectionTrust)
if err != nil {
return tokenInfoResponse, err
}
tppConnector.SetHTTPClient(httpClient)
tokenInfoResponse, err = tppConnector.RefreshAccessToken(&endpoint.Authentication{
RefreshToken: cfg.Credentials.RefreshToken,
ClientId: cfg.Credentials.ClientId,
Scope: "certificate:manage,revoke",
})
return tokenInfoResponse, err
}
func loadCertificateFromStorage(b *backend, ctx context.Context, req *logical.Request, certUID string, keyPassword string) (cert *VenafiCert, err error) {
path := "certs/" + certUID
entry, err := req.Storage.Get(ctx, path)
if err != nil {
return nil, fmt.Errorf("failed to read Venafi certificate: %s", err)
}
if entry == nil {
return nil, vpkierror.CertEntryNotFound{EntryPath: path}
}
b.Logger().Info(fmt.Sprintf("Getting venafi certificate from storage with ID: %v", certUID))
if err := entry.DecodeJSON(&cert); err != nil {
return nil, fmt.Errorf("error reading venafi configuration: %s", err.Error())
}
b.Logger().Debug("certificate is:" + cert.Certificate)
b.Logger().Debug("chain is:" + cert.CertificateChain)
if keyPassword != "" {
encryptedPrivateKeyPem, err := util.EncryptPrivateKey(cert.PrivateKey, keyPassword)
if err != nil {
return nil, fmt.Errorf("error opening private key: %s", err.Error())
}
cert.PrivateKey = encryptedPrivateKeyPem
}
return cert, nil
}