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notebooks.go
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package reporting
import (
"bytes"
"context"
"encoding/base64"
"fmt"
"html"
"io"
"io/ioutil"
"net/url"
"regexp"
"strings"
"github.com/Velocidex/yaml/v2"
"github.com/alexmullins/zip"
"github.com/pkg/errors"
actions_proto "www.velocidex.com/golang/velociraptor/actions/proto"
api_proto "www.velocidex.com/golang/velociraptor/api/proto"
config_proto "www.velocidex.com/golang/velociraptor/config/proto"
"www.velocidex.com/golang/velociraptor/datastore"
"www.velocidex.com/golang/velociraptor/file_store"
"www.velocidex.com/golang/velociraptor/json"
"www.velocidex.com/golang/velociraptor/paths"
"www.velocidex.com/golang/velociraptor/result_sets"
"www.velocidex.com/golang/velociraptor/utils"
)
var (
// Must match the output emitted by GuiTemplateEngine.Table
csvViewerRegexp = regexp.MustCompile(
`<grr-csv-viewer base-url="'v1/GetTable'" params='([^']+)' />`)
imageRegex = regexp.MustCompile(
`<img src=\"/notebooks/(?P<NotebookId>N.[^/]+)/(?P<Attachment>NA.[^.]+.png)\" (?P<Extra>[^>]*)>`)
)
const (
HtmlPreable = `
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>%s</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
<style>
pre {
display: block;
padding: 8px;
margin: 0 0 8.5px;
font-size: 12px;
line-height: 1.31;
word-break: break-all;
word-wrap: break-word;
color: #333333;
background-color: #f5f5f5;
border: 1px solid #ccc;
border-radius: 4px;
}
.notebook-cell {
border-color: transparent;
display: flex;
flex-direction: column;
align-items: stretch;
border-radius: 20px;
border-width: 3px;
border-style: none;
border-color: #ababab;
padding: 20px;
margin: 0px;
position: relative;
overflow: auto;
}
/* Error */ .chromaerr { color: #a61717; background-color: #e3d2d2 }
/* LineTableTD */ .chromalntd { vertical-align: top; padding: 0; margin: 0; border: 0; }
/* LineTable */ .chromalntable { border-spacing: 0; padding: 0; margin: 0; border: 0; width: auto; overflow: auto; display: block; }
/* LineHighlight */ .chromahl { display: block; width: 100%%; }
/* LineNumbersTable */ .chromalnt { margin-right: 0.4em; padding: 0 0.4em 0 0.4em; }
/* LineNumbers */ .chromaln { margin-right: 0.4em; padding: 0 0.4em 0 0.4em; }
/* Keyword */ .chromak { color: #000000; font-weight: bold }
/* KeywordConstant */ .chromakc { color: #000000; font-weight: bold }
/* KeywordDeclaration */ .chromakd { color: #000000; font-weight: bold }
/* KeywordNamespace */ .chromakn { color: #000000; font-weight: bold }
/* KeywordPseudo */ .chromakp { color: #000000; font-weight: bold }
/* KeywordReserved */ .chromakr { color: #000000; font-weight: bold }
/* KeywordType */ .chromakt { color: #445588; font-weight: bold }
/* NameAttribute */ .chromana { color: #008080 }
/* NameBuiltin */ .chromanb { color: #0086b3 }
/* NameBuiltinPseudo */ .chromabp { color: #999999 }
/* NameClass */ .chromanc { color: #445588; font-weight: bold }
/* NameConstant */ .chromano { color: #008080 }
/* NameDecorator */ .chromand { color: #3c5d5d; font-weight: bold }
/* NameEntity */ .chromani { color: #800080 }
/* NameException */ .chromane { color: #990000; font-weight: bold }
/* NameFunction */ .chromanf { color: #990000; font-weight: bold }
/* NameLabel */ .chromanl { color: #990000; font-weight: bold }
/* NameNamespace */ .chromann { color: #555555 }
/* NameTag */ .chromant { color: #000080 }
/* NameVariable */ .chromanv { color: #008080 }
/* NameVariableClass */ .chromavc { color: #008080 }
/* NameVariableGlobal */ .chromavg { color: #008080 }
/* NameVariableInstance */ .chromavi { color: #008080 }
/* LiteralString */ .chromas { color: #dd1144 }
/* LiteralStringAffix */ .chromasa { color: #dd1144 }
/* LiteralStringBacktick */ .chromasb { color: #dd1144 }
/* LiteralStringChar */ .chromasc { color: #dd1144 }
/* LiteralStringDelimiter */ .chromadl { color: #dd1144 }
/* LiteralStringDoc */ .chromasd { color: #dd1144 }
/* LiteralStringDouble */ .chromas2 { color: #dd1144 }
/* LiteralStringEscape */ .chromase { color: #dd1144 }
/* LiteralStringHeredoc */ .chromash { color: #dd1144 }
/* LiteralStringInterpol */ .chromasi { color: #dd1144 }
/* LiteralStringOther */ .chromasx { color: #dd1144 }
/* LiteralStringRegex */ .chromasr { color: #009926 }
/* LiteralStringSingle */ .chromas1 { color: #dd1144 }
/* LiteralStringSymbol */ .chromass { color: #990073 }
/* LiteralNumber */ .chromam { color: #009999 }
/* LiteralNumberBin */ .chromamb { color: #009999 }
/* LiteralNumberFloat */ .chromamf { color: #009999 }
/* LiteralNumberHex */ .chromamh { color: #009999 }
/* LiteralNumberInteger */ .chromami { color: #009999 }
/* LiteralNumberIntegerLong */ .chromail { color: #009999 }
/* LiteralNumberOct */ .chromamo { color: #009999 }
/* Operator */ .chromao { color: #000000; font-weight: bold }
/* OperatorWord */ .chromaow { color: #000000; font-weight: bold }
/* Comment */ .chromac { color: #999988; font-style: italic }
/* CommentHashbang */ .chromach { color: #999988; font-style: italic }
/* CommentMultiline */ .chromacm { color: #999988; font-style: italic }
/* CommentSingle */ .chromac1 { color: #999988; font-style: italic }
/* CommentSpecial */ .chromacs { color: #999999; font-weight: bold; font-style: italic }
/* CommentPreproc */ .chromacp { color: #999999; font-weight: bold; font-style: italic }
/* CommentPreprocFile */ .chromacpf { color: #999999; font-weight: bold; font-style: italic }
/* GenericDeleted */ .chromagd { color: #000000; background-color: #ffdddd }
/* GenericEmph */ .chromage { color: #000000; font-style: italic }
/* GenericError */ .chromagr { color: #aa0000 }
/* GenericHeading */ .chromagh { color: #999999 }
/* GenericInserted */ .chromagi { color: #000000; background-color: #ddffdd }
/* GenericOutput */ .chromago { color: #888888 }
/* GenericPrompt */ .chromagp { color: #555555 }
/* GenericStrong */ .chromags { font-weight: bold }
/* GenericSubheading */ .chromagu { color: #aaaaaa }
/* GenericTraceback */ .chromagt { color: #aa0000 }
/* TextWhitespace */ .chromaw { color: #bbbbbb }
</style>
</head>
<body>
<main role="main" class="container">
`
HtmlPostscript = `
</main>
</body>
</html>
`
)
func ExportNotebookToZip(
ctx context.Context,
config_obj *config_proto.Config,
notebook_path_manager *paths.NotebookPathManager) error {
db, err := datastore.GetDB(config_obj)
if err != nil {
return err
}
notebook := &api_proto.NotebookMetadata{}
err = db.GetSubject(config_obj, notebook_path_manager.Path(),
notebook)
if err != nil {
return err
}
for _, metadata := range notebook.CellMetadata {
if metadata.CellId != "" {
err = db.GetSubject(config_obj,
notebook_path_manager.Cell(metadata.CellId).Path(),
metadata)
if err != nil {
return err
}
metadata.Data = ""
}
}
serialized, err := yaml.Marshal(notebook)
if err != nil {
return err
}
file_store_factory := file_store.GetFileStore(config_obj)
fd, err := file_store_factory.WriteFile(notebook_path_manager.ZipExport())
if err != nil {
return err
}
defer fd.Close()
err = fd.Truncate()
if err != nil {
return err
}
// Do these first to ensure errors are returned if the zip file
// is not writable.
zip_writer := zip.NewWriter(fd)
defer zip_writer.Close()
cell_copier := func(notebook_id, cell_id string) {
path_manager := paths.NewNotebookPathManager(notebook_id)
exported_path_manager := paths.NewNotebookExportPathManager(
notebook_id)
children, err := file_store_factory.ListDirectory(
path_manager.CellDirectory(cell_id))
if err != nil {
return
}
for _, child := range children {
out_filename := exported_path_manager.CellItem(
cell_id, child.Name())
// In Zip files, members should have no leading /
zip_out_filename := strings.TrimPrefix(
out_filename.AsClientPath(), "/")
out_fd, err := zip_writer.Create(zip_out_filename)
if err != nil {
continue
}
fd, err := file_store_factory.ReadFile(
path_manager.Cell(cell_id).Item(child.Name()))
if err != nil {
continue
}
defer fd.Close()
_, _ = utils.Copy(ctx, out_fd, fd)
}
}
for _, cell := range notebook.CellMetadata {
cell_copier(notebook.NotebookId, cell.CellId)
}
f, err := zip_writer.Create("Notebook.yaml")
if err != nil {
fd.Close()
return err
}
_, err = f.Write(serialized)
return err
}
func ExportNotebookToHTML(
ctx context.Context,
config_obj *config_proto.Config,
notebook_id string, output io.Writer) error {
db, err := datastore.GetDB(config_obj)
if err != nil {
return err
}
notebook_path_manager := paths.NewNotebookPathManager(notebook_id)
notebook := &api_proto.NotebookMetadata{}
err = db.GetSubject(config_obj, notebook_path_manager.Path(),
notebook)
if err != nil {
return err
}
_, err = output.Write([]byte(fmt.Sprintf(HtmlPreable, notebook.Name)))
if err != nil {
return err
}
// Write the postscript when we are done.
defer func() {
_, _ = output.Write([]byte(HtmlPostscript))
}()
cell := &api_proto.NotebookCell{}
for _, cell_md := range notebook.CellMetadata {
err = db.GetSubject(config_obj,
notebook_path_manager.Cell(cell_md.CellId).Path(),
cell)
if err != nil {
return err
}
_, err = output.Write([]byte("<div class=\"notebook-cell\">\n"))
if err != nil {
return err
}
cell_output := imageRegex.ReplaceAllStringFunc(
cell.Output, func(in string) string {
file_store_factory := file_store.GetFileStore(config_obj)
submatches := imageRegex.FindStringSubmatch(in)
if len(submatches) < 3 {
return in
}
extra := ""
if len(submatches) > 3 {
extra = submatches[3]
}
item_path := notebook_path_manager.Cell("").Item(submatches[2])
fd, err := file_store_factory.ReadFile(item_path)
if err != nil {
return in
}
data, err := ioutil.ReadAll(fd)
if err != nil {
return in
}
return fmt.Sprintf(`<img src="data:image/jpg;base64,%v" %s>`,
base64.StdEncoding.EncodeToString(data), extra)
})
// Expand tables
new_cell_output := csvViewerRegexp.ReplaceAllStringFunc(
cell_output, func(in string) string {
result, err := convertCSVTags(ctx, config_obj, in, cell)
if err != nil {
return fmt.Sprintf(
"<error>%s</error>",
html.EscapeString(err.Error()))
}
return result
})
_, err := output.Write([]byte(new_cell_output))
if err != nil {
return err
}
_, err = output.Write([]byte("</div>\n"))
if err != nil {
return err
}
}
return nil
}
// Unpack the table referenced in the csv view tag from the data field.
func convertCSVTags(
ctx context.Context,
config_obj *config_proto.Config,
in string,
cell *api_proto.NotebookCell) (string, error) {
output := &bytes.Buffer{}
data := make(map[string]*actions_proto.VQLResponse)
err := json.Unmarshal([]byte(cell.Data), &data)
if err != nil {
return "", err
}
m := csvViewerRegexp.FindStringSubmatch(in)
if len(m) < 1 {
return "", errors.New("Unexpected regexp match")
}
unescaped, err := url.QueryUnescape(m[1])
if err != nil {
return "", errors.New("Unexpected regexp match")
}
params := &api_proto.GetTableRequest{}
err = json.Unmarshal([]byte(unescaped), params)
if err != nil {
return "", err
}
path_manager := paths.NewNotebookPathManager(params.NotebookId).Cell(
params.CellId).QueryStorage(params.TableId)
file_store_factory := file_store.GetFileStore(config_obj)
reader, err := result_sets.NewResultSetReader(
file_store_factory, path_manager.Path())
if err != nil {
return "", err
}
defer reader.Close()
headers := false
for row := range reader.Rows(ctx) {
if !headers {
output.WriteString("\n<table class=\"table table-striped\">\n <thead>\n")
output.WriteString(" <tr>\n")
for _, header := range row.Keys() {
output.WriteString(fmt.Sprintf(
" <th>%s</th>\n", html.EscapeString(header)))
}
output.WriteString(" </tr>\n </thead>\n")
output.WriteString(" <tbody>\n")
headers = true
}
output.WriteString(" <tr>\n")
for _, header := range row.Keys() {
value, pres := row.Get(header)
if !pres {
value = ""
}
output.WriteString(
fmt.Sprintf(" <td>%s</td>\n",
html.EscapeString(
fmt.Sprintf("%v", value))))
}
output.WriteString(" </tr>\n")
}
output.WriteString(" </tbody>\n")
output.WriteString("</table>\n")
return output.String(), nil
}