func hasPrivateKey()

in pkg/internal/crypto/crypto_windows.go [129:166]

• 33 lines of code
• 5 McCabe index (conditional complexity)

func hasPrivateKey(cert *CertContext) bool {
	var ncryptKeyHandle uintptr
	var dwKeySpec uint32
	var fCallerFreeProvOrNCryptKey uint32
	ret, _, err := syscall.Syscall6(
		procCryptAcquireCertificatePrivateKey.Addr(),
		6,
		uintptr(unsafe.Pointer(cert)),
		uintptr(0),
		uintptr(0),
		uintptr(unsafe.Pointer(&ncryptKeyHandle)),
		uintptr(unsafe.Pointer(&dwKeySpec)),
		uintptr(unsafe.Pointer(&fCallerFreeProvOrNCryptKey)))
	if ret == 0 {
		if err > 0 {
			// If for some reason we can't retrieve the private key, move on
			return false
		}
	}

	// Figure out if we need to release the handle
	if fCallerFreeProvOrNCryptKey != 0 {
		if dwKeySpec == certNCryptKeySpec {
			// We received an CERT_NCRYPT_KEY_SPEC
			syscall.Syscall(
				procNCryptFreeObject.Addr(),
				1,
				uintptr(ncryptKeyHandle),
				0,
				0)
		} else {
			handle := syscall.Handle(ncryptKeyHandle)
			syscall.CryptReleaseContext(handle, 0)
		}
	}

	return true
}