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e5f9c16 Aug 13, 2018
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@FiloSottile @cretz
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package main
import (
"crypto/x509"
"encoding/pem"
"fmt"
"io/ioutil"
"math/big"
"os"
"path/filepath"
"syscall"
"unsafe"
)
var (
FirefoxProfile = os.Getenv("USERPROFILE") + "\\AppData\\Roaming\\Mozilla\\Firefox\\Profiles"
CertutilInstallHelp = "" // certutil unsupported on Windows
NSSBrowsers = "Firefox"
)
var (
modcrypt32 = syscall.NewLazyDLL("crypt32.dll")
procCertAddEncodedCertificateToStore = modcrypt32.NewProc("CertAddEncodedCertificateToStore")
procCertCloseStore = modcrypt32.NewProc("CertCloseStore")
procCertDeleteCertificateFromStore = modcrypt32.NewProc("CertDeleteCertificateFromStore")
procCertDuplicateCertificateContext = modcrypt32.NewProc("CertDuplicateCertificateContext")
procCertEnumCertificatesInStore = modcrypt32.NewProc("CertEnumCertificatesInStore")
procCertOpenSystemStoreW = modcrypt32.NewProc("CertOpenSystemStoreW")
)
func (m *mkcert) installPlatform() bool {
// Load cert
cert, err := ioutil.ReadFile(filepath.Join(m.CAROOT, rootName))
fatalIfErr(err, "failed to read root certificate")
// Decode PEM
if certBlock, _ := pem.Decode(cert); certBlock == nil || certBlock.Type != "CERTIFICATE" {
fatalIfErr(fmt.Errorf("Invalid PEM data"), "decode pem")
} else {
cert = certBlock.Bytes
}
// Open root store
store, err := openWindowsRootStore()
fatalIfErr(err, "open root store")
defer store.close()
// Add cert
fatalIfErr(store.addCert(cert), "add cert")
return true
}
func (m *mkcert) uninstallPlatform() bool {
// We'll just remove all certs with the same serial number
// Open root store
store, err := openWindowsRootStore()
fatalIfErr(err, "open root store")
defer store.close()
// Do the deletion
deletedAny, err := store.deleteCertsWithSerial(m.caCert.SerialNumber)
if err == nil && !deletedAny {
err = fmt.Errorf("No certs found")
}
fatalIfErr(err, "delete cert")
return true
}
type windowsRootStore uintptr
func openWindowsRootStore() (windowsRootStore, error) {
store, _, err := procCertOpenSystemStoreW.Call(0, uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr("ROOT"))))
if store != 0 {
return windowsRootStore(store), nil
}
return 0, fmt.Errorf("Failed to open windows root store: %v", err)
}
func (w windowsRootStore) close() error {
ret, _, err := procCertCloseStore.Call(uintptr(w), 0)
if ret != 0 {
return nil
}
return fmt.Errorf("Failed to close windows root store: %v", err)
}
func (w windowsRootStore) addCert(cert []byte) error {
// TODO: ok to always overwrite?
ret, _, err := procCertAddEncodedCertificateToStore.Call(
uintptr(w), // HCERTSTORE hCertStore
uintptr(syscall.X509_ASN_ENCODING|syscall.PKCS_7_ASN_ENCODING), // DWORD dwCertEncodingType
uintptr(unsafe.Pointer(&cert[0])), // const BYTE *pbCertEncoded
uintptr(len(cert)), // DWORD cbCertEncoded
3, // DWORD dwAddDisposition (CERT_STORE_ADD_REPLACE_EXISTING is 3)
0, // PCCERT_CONTEXT *ppCertContext
)
if ret != 0 {
return nil
}
return fmt.Errorf("Failed adding cert: %v", err)
}
func (w windowsRootStore) deleteCertsWithSerial(serial *big.Int) (bool, error) {
// Go over each, deleting the ones we find
var cert *syscall.CertContext
deletedAny := false
for {
// Next enum
certPtr, _, err := procCertEnumCertificatesInStore.Call(uintptr(w), uintptr(unsafe.Pointer(cert)))
if cert = (*syscall.CertContext)(unsafe.Pointer(certPtr)); cert == nil {
if errno, ok := err.(syscall.Errno); ok && errno == 0x80092004 {
break
}
return deletedAny, fmt.Errorf("Failed enumerating certs: %v", err)
}
// Parse cert
certBytes := (*[1 << 20]byte)(unsafe.Pointer(cert.EncodedCert))[:cert.Length]
parsedCert, err := x509.ParseCertificate(certBytes)
// We'll just ignore parse failures for now
if err == nil && parsedCert.SerialNumber != nil && parsedCert.SerialNumber.Cmp(serial) == 0 {
// Duplicate the context so it doesn't stop the enum when we delete it
dupCertPtr, _, err := procCertDuplicateCertificateContext.Call(uintptr(unsafe.Pointer(cert)))
if dupCertPtr == 0 {
return deletedAny, fmt.Errorf("Failed duplicating context: %v", err)
}
if ret, _, err := procCertDeleteCertificateFromStore.Call(dupCertPtr); ret == 0 {
return deletedAny, fmt.Errorf("Failed deleting certificate: %v", err)
}
deletedAny = true
}
}
return deletedAny, nil
}