656 lines
16 KiB
Go
656 lines
16 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package osdiag
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import (
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"encoding/binary"
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"errors"
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"fmt"
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"path/filepath"
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"strings"
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"unicode/utf16"
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"unsafe"
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"github.com/dblohm7/wingoes/com"
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"github.com/dblohm7/wingoes/pe"
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"golang.org/x/sys/windows"
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"golang.org/x/sys/windows/registry"
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"tailscale.com/util/osdiag/internal/wsc"
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"tailscale.com/util/winutil"
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"tailscale.com/util/winutil/authenticode"
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)
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var (
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errUnexpectedResult = errors.New("API call returned an unexpected value")
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)
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const (
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maxBinaryValueLen = 128 // we'll truncate any binary values longer than this
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maxRegValueNameLen = 16384 // maximum length supported by Windows + 1
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initialValueBufLen = 80 // large enough to contain a stringified GUID encoded as UTF-16
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)
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const (
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supportInfoKeyModules = "modules"
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supportInfoKeyPageFile = "pageFile"
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supportInfoKeyRegistry = "registry"
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supportInfoKeySecurity = "securitySoftware"
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supportInfoKeyWinsockLSP = "winsockLSP"
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)
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func supportInfo(reason LogSupportInfoReason) map[string]any {
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output := make(map[string]any)
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regInfo, err := getRegistrySupportInfo(registry.LOCAL_MACHINE, []string{winutil.RegPolicyBase, winutil.RegBase})
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if err == nil {
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output[supportInfoKeyRegistry] = regInfo
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} else {
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output[supportInfoKeyRegistry] = err
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}
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pageFileInfo, err := getPageFileInfo()
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if err == nil {
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output[supportInfoKeyPageFile] = pageFileInfo
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} else {
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output[supportInfoKeyPageFile] = err
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}
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if reason == LogSupportInfoReasonBugReport {
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modInfo, err := getModuleInfo()
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if err == nil {
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output[supportInfoKeyModules] = modInfo
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} else {
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output[supportInfoKeyModules] = err
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}
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output[supportInfoKeySecurity] = getSecurityInfo()
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lspInfo, err := getWinsockLSPInfo()
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if err == nil {
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output[supportInfoKeyWinsockLSP] = lspInfo
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} else {
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output[supportInfoKeyWinsockLSP] = err
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}
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}
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return output
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}
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type getRegistrySupportInfoBufs struct {
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nameBuf []uint16
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valueBuf []byte
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}
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func getRegistrySupportInfo(root registry.Key, subKeys []string) (map[string]any, error) {
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bufs := getRegistrySupportInfoBufs{
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nameBuf: make([]uint16, maxRegValueNameLen),
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valueBuf: make([]byte, initialValueBufLen),
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}
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output := make(map[string]any)
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for _, subKey := range subKeys {
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if err := getRegSubKey(root, subKey, 5, &bufs, output); err != nil && !errors.Is(err, registry.ErrNotExist) {
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return nil, fmt.Errorf("getRegistrySupportInfo: %w", err)
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}
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}
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return output, nil
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}
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func keyString(key registry.Key, subKey string) string {
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var keyStr string
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switch key {
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case registry.CLASSES_ROOT:
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keyStr = `HKCR\`
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case registry.CURRENT_USER:
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keyStr = `HKCU\`
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case registry.LOCAL_MACHINE:
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keyStr = `HKLM\`
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case registry.USERS:
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keyStr = `HKU\`
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case registry.CURRENT_CONFIG:
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keyStr = `HKCC\`
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case registry.PERFORMANCE_DATA:
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keyStr = `HKPD\`
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default:
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}
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return keyStr + subKey
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}
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func getRegSubKey(key registry.Key, subKey string, recursionLimit int, bufs *getRegistrySupportInfoBufs, output map[string]any) error {
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keyStr := keyString(key, subKey)
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k, err := registry.OpenKey(key, subKey, registry.READ)
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if err != nil {
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return fmt.Errorf("opening %q: %w", keyStr, err)
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}
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defer k.Close()
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kv := make(map[string]any)
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index := uint32(0)
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loopValues:
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for {
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nbuf := bufs.nameBuf
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nameLen := uint32(len(nbuf))
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valueType := uint32(0)
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vbuf := bufs.valueBuf
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valueLen := uint32(len(vbuf))
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err := regEnumValue(k, index, &nbuf[0], &nameLen, nil, &valueType, &vbuf[0], &valueLen)
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switch err {
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case windows.ERROR_NO_MORE_ITEMS:
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break loopValues
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case windows.ERROR_MORE_DATA:
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bufs.valueBuf = make([]byte, valueLen)
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continue
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case nil:
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default:
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return fmt.Errorf("regEnumValue: %w", err)
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}
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var value any
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switch valueType {
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case registry.SZ, registry.EXPAND_SZ:
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value = windows.UTF16PtrToString((*uint16)(unsafe.Pointer(&vbuf[0])))
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case registry.BINARY:
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if valueLen > maxBinaryValueLen {
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valueLen = maxBinaryValueLen
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}
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value = append([]byte{}, vbuf[:valueLen]...)
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case registry.DWORD:
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value = binary.LittleEndian.Uint32(vbuf[:4])
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case registry.MULTI_SZ:
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// Adapted from x/sys/windows/registry/(Key).GetStringsValue
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p := (*[1 << 29]uint16)(unsafe.Pointer(&vbuf[0]))[: valueLen/2 : valueLen/2]
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var strs []string
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if len(p) > 0 {
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if p[len(p)-1] == 0 {
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p = p[:len(p)-1]
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}
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strs = make([]string, 0, 5)
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from := 0
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for i, c := range p {
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if c == 0 {
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strs = append(strs, string(utf16.Decode(p[from:i])))
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from = i + 1
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}
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}
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}
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value = strs
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case registry.QWORD:
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value = binary.LittleEndian.Uint64(vbuf[:8])
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default:
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value = fmt.Sprintf("<unsupported value type %d>", valueType)
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}
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kv[windows.UTF16PtrToString(&nbuf[0])] = value
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index++
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}
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if recursionLimit > 0 {
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if sks, err := k.ReadSubKeyNames(0); err == nil {
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for _, sk := range sks {
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if err := getRegSubKey(k, sk, recursionLimit-1, bufs, kv); err != nil {
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return err
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}
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}
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}
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}
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output[keyStr] = kv
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return nil
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}
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type moduleInfo struct {
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path string `json:"-"` // internal use only
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BaseAddress uintptr `json:"baseAddress"`
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Size uint32 `json:"size"`
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DebugInfo map[string]string `json:"debugInfo,omitempty"` // map for JSON marshaling purposes
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DebugInfoErr error `json:"debugInfoErr,omitempty"`
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Signature map[string]string `json:"signature,omitempty"` // map for JSON marshaling purposes
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SignatureErr error `json:"signatureErr,omitempty"`
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VersionInfo map[string]string `json:"versionInfo,omitempty"` // map for JSON marshaling purposes
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VersionErr error `json:"versionErr,omitempty"`
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}
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func (mi *moduleInfo) setVersionInfo() {
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vi, err := pe.NewVersionInfo(mi.path)
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if err != nil {
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if !errors.Is(err, pe.ErrNotPresent) {
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mi.VersionErr = err
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}
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return
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}
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info := map[string]string{
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"": vi.VersionNumber().String(),
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}
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ci, err := vi.Field("CompanyName")
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if err == nil {
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info["companyName"] = ci
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}
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mi.VersionInfo = info
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}
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var errAssertingType = errors.New("asserting DataDirectory type")
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func (mi *moduleInfo) setDebugInfo() {
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pem, err := pe.NewPEFromBaseAddressAndSize(mi.BaseAddress, mi.Size)
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if err != nil {
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mi.DebugInfoErr = err
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return
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}
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defer pem.Close()
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debugDirAny, err := pem.DataDirectoryEntry(pe.IMAGE_DIRECTORY_ENTRY_DEBUG)
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if err != nil {
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if !errors.Is(err, pe.ErrNotPresent) {
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mi.DebugInfoErr = err
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}
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return
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}
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debugDir, ok := debugDirAny.([]pe.IMAGE_DEBUG_DIRECTORY)
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if !ok {
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mi.DebugInfoErr = errAssertingType
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return
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}
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for _, dde := range debugDir {
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if dde.Type != pe.IMAGE_DEBUG_TYPE_CODEVIEW {
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continue
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}
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cv, err := pem.ExtractCodeViewInfo(dde)
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if err == nil {
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mi.DebugInfo = map[string]string{
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"id": cv.String(),
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"pdb": strings.ToLower(filepath.Base(cv.PDBPath)),
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}
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} else {
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mi.DebugInfoErr = err
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}
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return
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}
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}
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func (mi *moduleInfo) setAuthenticodeInfo() {
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certSubject, provenance, err := authenticode.QueryCertSubject(mi.path)
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if err != nil {
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if !errors.Is(err, authenticode.ErrSigNotFound) {
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mi.SignatureErr = err
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}
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return
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}
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sigInfo := map[string]string{
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"subject": certSubject,
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}
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switch provenance {
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case authenticode.SigProvEmbedded:
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sigInfo["provenance"] = "embedded"
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case authenticode.SigProvCatalog:
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sigInfo["provenance"] = "catalog"
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default:
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}
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mi.Signature = sigInfo
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}
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func getModuleInfo() (map[string]moduleInfo, error) {
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// Take a snapshot of all modules currently loaded into the current process
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snap, err := windows.CreateToolhelp32Snapshot(windows.TH32CS_SNAPMODULE, 0)
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if err != nil {
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return nil, err
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}
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defer windows.CloseHandle(snap)
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result := make(map[string]moduleInfo)
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me := windows.ModuleEntry32{
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Size: uint32(unsafe.Sizeof(windows.ModuleEntry32{})),
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}
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// Now walk the list
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for merr := windows.Module32First(snap, &me); merr == nil; merr = windows.Module32Next(snap, &me) {
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name := strings.ToLower(windows.UTF16ToString(me.Module[:]))
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path := windows.UTF16ToString(me.ExePath[:])
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base := me.ModBaseAddr
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size := me.ModBaseSize
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entry := moduleInfo{
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path: path,
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BaseAddress: base,
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Size: size,
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}
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entry.setVersionInfo()
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entry.setDebugInfo()
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entry.setAuthenticodeInfo()
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result[name] = entry
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}
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return result, nil
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}
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type _WSC_PROVIDER_INFO_TYPE int32
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const (
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providerInfoLspCategories _WSC_PROVIDER_INFO_TYPE = 0
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)
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const (
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_SOCKET_ERROR = -1
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)
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// Note that wsaProtocolInfo needs to be identical to windows.WSAProtocolInfo;
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// the purpose of this type is to have the ability to use it as a reciever in
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// the path and categoryFlags funcs defined below.
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type wsaProtocolInfo windows.WSAProtocolInfo
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func (pi *wsaProtocolInfo) path() (string, error) {
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var errno int32
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var buf [windows.MAX_PATH]uint16
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bufCount := int32(len(buf))
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ret := wscGetProviderPath(&pi.ProviderId, &buf[0], &bufCount, &errno)
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if ret == _SOCKET_ERROR {
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return "", windows.Errno(errno)
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}
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if ret != 0 {
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return "", errUnexpectedResult
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}
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return windows.UTF16ToString(buf[:bufCount]), nil
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}
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func (pi *wsaProtocolInfo) categoryFlags() (uint32, error) {
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var errno int32
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var result uint32
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bufLen := uintptr(unsafe.Sizeof(result))
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ret := wscGetProviderInfo(&pi.ProviderId, providerInfoLspCategories, unsafe.Pointer(&result), &bufLen, 0, &errno)
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if ret == _SOCKET_ERROR {
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return 0, windows.Errno(errno)
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}
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if ret != 0 {
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return 0, errUnexpectedResult
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}
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return result, nil
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}
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type wsaProtocolInfoOutput struct {
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Description string `json:"description,omitempty"`
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Version int32 `json:"version"`
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AddressFamily int32 `json:"addressFamily"`
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SocketType int32 `json:"socketType"`
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Protocol int32 `json:"protocol"`
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ServiceFlags1 string `json:"serviceFlags1"`
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ProviderFlags string `json:"providerFlags"`
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Path string `json:"path,omitempty"`
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PathErr error `json:"pathErr,omitempty"`
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Category string `json:"category,omitempty"`
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CategoryErr error `json:"categoryErr,omitempty"`
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BaseProviderID string `json:"baseProviderID,omitempty"`
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LayerProviderID string `json:"layerProviderID,omitempty"`
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Chain []uint32 `json:"chain,omitempty"`
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}
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func getWinsockLSPInfo() (map[uint32]wsaProtocolInfoOutput, error) {
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protocols, err := enumWinsockProtocols()
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if err != nil {
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return nil, err
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}
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result := make(map[uint32]wsaProtocolInfoOutput, len(protocols))
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for _, p := range protocols {
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v := wsaProtocolInfoOutput{
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Description: windows.UTF16ToString(p.ProtocolName[:]),
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Version: p.Version,
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AddressFamily: p.AddressFamily,
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SocketType: p.SocketType,
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Protocol: p.Protocol,
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ServiceFlags1: fmt.Sprintf("0x%08X", p.ServiceFlags1), // Serializing as hex string to make the flags easier to decode by human inspection
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ProviderFlags: fmt.Sprintf("0x%08X", p.ProviderFlags),
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}
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switch p.ProtocolChain.ChainLen {
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case windows.BASE_PROTOCOL:
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v.BaseProviderID = p.ProviderId.String()
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case windows.LAYERED_PROTOCOL:
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v.LayerProviderID = p.ProviderId.String()
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default:
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v.Chain = p.ProtocolChain.ChainEntries[:p.ProtocolChain.ChainLen]
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}
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// Queries that are only valid for base and layered protocols (not chains)
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if v.Chain == nil {
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path, err := p.path()
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if err == nil {
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v.Path = strings.ToLower(path)
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} else {
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v.PathErr = err
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}
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category, err := p.categoryFlags()
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if err == nil {
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v.Category = fmt.Sprintf("0x%08X", category)
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} else if !errors.Is(err, windows.WSAEINVALIDPROVIDER) {
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// WSAEINVALIDPROVIDER == "no category info found", so we only log
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// errors other than that one.
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v.CategoryErr = err
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}
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}
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// Chains reference other providers using catalog entry IDs, so we use that
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// value as the key in our map.
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result[p.CatalogEntryId] = v
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}
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return result, nil
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}
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func enumWinsockProtocols() ([]wsaProtocolInfo, error) {
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// Get the required size
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var errno int32
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var bytesReqd uint32
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ret := wscEnumProtocols(nil, nil, &bytesReqd, &errno)
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if ret != _SOCKET_ERROR {
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return nil, errUnexpectedResult
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}
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if e := windows.Errno(errno); e != windows.WSAENOBUFS {
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return nil, e
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}
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// Allocate
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szEntry := uint32(unsafe.Sizeof(wsaProtocolInfo{}))
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buf := make([]wsaProtocolInfo, bytesReqd/szEntry)
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// Now do the query for real
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bufLen := uint32(len(buf)) * szEntry
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ret = wscEnumProtocols(nil, &buf[0], &bufLen, &errno)
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if ret == _SOCKET_ERROR {
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return nil, windows.Errno(errno)
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}
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return buf, nil
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}
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type providerKey struct {
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provType wsc.WSC_SECURITY_PROVIDER
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provKey string
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}
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var providerKeys = []providerKey{
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providerKey{
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wsc.WSC_SECURITY_PROVIDER_ANTIVIRUS,
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"av",
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},
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providerKey{
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wsc.WSC_SECURITY_PROVIDER_ANTISPYWARE,
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"antispy",
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},
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providerKey{
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wsc.WSC_SECURITY_PROVIDER_FIREWALL,
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"firewall",
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},
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}
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const (
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maxProvCount = 100
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)
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type secProductInfo struct {
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Name string `json:"name,omitempty"`
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NameErr error `json:"nameErr,omitempty"`
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State string `json:"state,omitempty"`
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StateErr error `json:"stateErr,omitempty"`
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}
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func getSecurityInfo() map[string]any {
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result := make(map[string]any)
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for _, prov := range providerKeys {
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// Note that we need to obtain a new product list for each provider type;
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// the docs clearly state that we cannot reuse objects.
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productList, err := com.CreateInstance[wsc.WSCProductList](wsc.CLSID_WSCProductList)
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if err != nil {
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result[prov.provKey] = err
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continue
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}
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err = productList.Initialize(prov.provType)
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if err != nil {
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result[prov.provKey] = err
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continue
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}
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n, err := productList.GetCount()
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if err != nil {
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result[prov.provKey] = err
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continue
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}
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if n == 0 {
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continue
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}
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n = min(n, maxProvCount)
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values := make([]any, 0, n)
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for i := int32(0); i < n; i++ {
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product, err := productList.GetItem(uint32(i))
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if err != nil {
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values = append(values, err)
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continue
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}
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var value secProductInfo
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value.Name, err = product.GetProductName()
|
|
if err != nil {
|
|
value.NameErr = err
|
|
}
|
|
|
|
state, err := product.GetProductState()
|
|
if err == nil {
|
|
switch state {
|
|
case wsc.WSC_SECURITY_PRODUCT_STATE_ON:
|
|
value.State = "on"
|
|
case wsc.WSC_SECURITY_PRODUCT_STATE_OFF:
|
|
value.State = "off"
|
|
case wsc.WSC_SECURITY_PRODUCT_STATE_SNOOZED:
|
|
value.State = "snoozed"
|
|
case wsc.WSC_SECURITY_PRODUCT_STATE_EXPIRED:
|
|
value.State = "expired"
|
|
default:
|
|
value.State = fmt.Sprintf("<unknown state value %d>", state)
|
|
}
|
|
} else {
|
|
value.StateErr = err
|
|
}
|
|
|
|
values = append(values, value)
|
|
}
|
|
|
|
result[prov.provKey] = values
|
|
}
|
|
|
|
return result
|
|
}
|
|
|
|
type _MEMORYSTATUSEX struct {
|
|
Length uint32
|
|
MemoryLoad uint32
|
|
TotalPhys uint64
|
|
AvailPhys uint64
|
|
TotalPageFile uint64
|
|
AvailPageFile uint64
|
|
TotalVirtual uint64
|
|
AvailVirtual uint64
|
|
AvailExtendedVirtual uint64
|
|
}
|
|
|
|
func getPageFileInfo() (map[string]any, error) {
|
|
memStatus := _MEMORYSTATUSEX{
|
|
Length: uint32(unsafe.Sizeof(_MEMORYSTATUSEX{})),
|
|
}
|
|
if err := globalMemoryStatusEx(&memStatus); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
result := map[string]any{
|
|
"bytesAvailable": memStatus.AvailPageFile,
|
|
"bytesTotal": memStatus.TotalPageFile,
|
|
}
|
|
|
|
if entries, err := getEffectivePageFileValue(); err == nil {
|
|
// autoManaged is set to true when there is at least one page file that
|
|
// is automatically managed.
|
|
autoManaged := false
|
|
|
|
// If there is only one entry that consists of only one part, then
|
|
// the page files are 100% managed by the system.
|
|
// If there are multiple entries, then each one must be checked.
|
|
// Each entry then consists of three components, deliminated by spaces.
|
|
// If the latter two components are both "0", then that entry is auto-managed.
|
|
for _, entry := range entries {
|
|
if parts := strings.Split(entry, " "); (len(parts) == 1 && len(entries) == 1) ||
|
|
(len(parts) == 3 && parts[1] == "0" && parts[2] == "0") {
|
|
autoManaged = true
|
|
break
|
|
}
|
|
}
|
|
|
|
result["autoManaged"] = autoManaged
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
func getEffectivePageFileValue() ([]string, error) {
|
|
const subKey = `SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management`
|
|
key, err := registry.OpenKey(registry.LOCAL_MACHINE, subKey, registry.QUERY_VALUE)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer key.Close()
|
|
|
|
// Rare but possible case: the user has updated their page file config but
|
|
// they haven't yet rebooted for the change to take effect. This is the
|
|
// current setting that the machine is still operating with.
|
|
if entries, _, err := key.GetStringsValue("ExistingPageFiles"); err == nil {
|
|
return entries, nil
|
|
}
|
|
|
|
// Otherwise we use this value (yes, the above value uses "Page" and this one uses "Paging").
|
|
entries, _, err := key.GetStringsValue("PagingFiles")
|
|
return entries, err
|
|
}
|