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85 changes: 75 additions & 10 deletions src/commands/malware/malware.go
Original file line number Diff line number Diff line change
Expand Up @@ -3,23 +3,81 @@ package malware
import (
"bufio"
"common/license"
"common/malwaredb"
"common/modulefirewall"
"common/notify"
"common/settings"
"common/system"
"encoding/json"
"fmt"
"nvm/constant"
"os"
"path/filepath"
"strings"
"text/tabwriter"

winreg "golang.org/x/sys/windows/registry"
)

type Root struct {
Status Status `cmd:"status" help:"Show the local malware verdict for one or more packages."`
Evaluate Evaluate `cmd:"evaluate" hidden:"true" help:"Internal: POST a malware hit list to the organization block-list URL."`
NotifyBlock NotifyBlock `cmd:"notify-block" hidden:"true" help:"Internal: background toast after a malware block."`
}

type Status struct {
Modules []string `arg:"" name:"module" help:"Package name or name@version."`
constant.FlagJSON
}

func (c *Status) Run() error {
if len(c.Modules) == 0 {
return fmt.Errorf("specify one or more modules")
}
cfg := settings.Global()
in := malwaredb.Input{
Certified: !license.IsCommunityBuild(),
Skip: cfg.SkipMalwareChecks,
AllowList: cfg.MalwareAllowList,
BlockList: cfg.MalwareBlockList,
TrustConflict: cfg.MalwareTrustConflict,
}
if in.Certified {
if _, ok := modulefirewall.ExtractHTTPSURL(cfg.MalwareBlockList); ok {
in.RemoteConfigured = true
}
}
dbPath := filepath.Join(settings.Expand(cfg.Root), malwaredb.DBFileName)
db, err := malwaredb.Open(dbPath)
if err != nil {
in.DBErr = err
} else {
in.DB = db
}

rows := make([]malwaredb.Row, 0, len(c.Modules))
for _, raw := range c.Modules {
mod := malwaredb.ParseModule(raw)
grant := modulefirewall.PackageSpec{Name: mod.Name, Version: mod.Version, Raw: mod.Raw}
rowIn := in
rowIn.Trusted = modulefirewall.ExplicitModuleGrant(grant, cfg.TrustedModules)
rowIn.Approved = modulefirewall.ExplicitModuleGrant(grant, cfg.ApprovedModules)
rowIn.ApprovedGlobal = modulefirewall.ExplicitModuleGrant(grant, cfg.ApprovedGlobalModules)
rows = append(rows, malwaredb.Check(mod, rowIn))
}

if c.JSON {
enc := json.NewEncoder(os.Stdout)
enc.SetEscapeHTML(false)
return enc.Encode(rows)
}
tw := tabwriter.NewWriter(os.Stdout, 0, 8, 2, ' ', 0)
for _, row := range rows {
fmt.Fprintln(tw, malwaredb.FormatStatusLine(row))
}
return tw.Flush()
}

type Evaluate struct {
URL string `arg:"" name:"url" help:"Organization malware policy URL."`
}
Expand Down Expand Up @@ -52,7 +110,7 @@ func (c *Evaluate) Run() error {
}
body, err := json.Marshal(hits)
if err != nil {
fmt.Println("0")
fmt.Print(formatEvaluateStdout(modulefirewall.RemoteResult{Status: 0}))
return nil
}
cfg := settings.Global()
Expand All @@ -65,34 +123,41 @@ func (c *Evaluate) Run() error {
Body: body,
ContentType: "application/json",
})
fmt.Println(res.Status)
names := make([]string, 0, len(res.Blocks))
for _, block := range res.Blocks {
if block.Name != "" {
names = append(names, block.Name)
}
}
fmt.Println(strings.Join(names, "\t"))
fmt.Print(formatEvaluateStdout(res))
if res.Status == 0 {
os.Exit(2)
}
return nil
}

func formatEvaluateStdout(res modulefirewall.RemoteResult) string {
var b strings.Builder
fmt.Fprintf(&b, "%d\n", res.Status)
for _, block := range res.Blocks {
fmt.Fprintf(&b, "%s\t%s\t%s\n", block.Name, block.Date, block.Reason)
}
return b.String()
}

type NotifyBlock struct {
Title string `flag:"title" hidden:"true" help:"Toast title."`
Packages []string `arg:"" optional:"" name:"package" help:"Blocked package names."`
}

func (c *NotifyBlock) Run() error {
if system.IsAppInForeground() || len(c.Packages) == 0 {
return nil
}
title := strings.TrimSpace(c.Title)
if title == "" {
title = "Malicious package blocked"
}
body := blockBody(c.Packages)
if license.IsCommunityBuild() && corporatePC() {
body += " Certified keeps a record of blocks like this for your security tools."
}
// Critical security toast: no collection (reserved nvm.security).
return notify.SendWithAudio(settings.AppId, "Malicious package blocked", body, "ms-winsoundevent:Notification.Reminder")
return notify.SendWithAudio(settings.AppId, title, body, "ms-winsoundevent:Notification.Reminder")
}

func blockBody(packages []string) string {
Expand Down
35 changes: 35 additions & 0 deletions src/commands/malware/malware_test.go
Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
package malware

import (
"common/modulefirewall"
"strings"
"testing"
)

func TestFormatEvaluateStdoutIncludesReason(t *testing.T) {
got := formatEvaluateStdout(modulefirewall.RemoteResult{
Status: 403,
Blocks: []modulefirewall.RemoteBlock{
{Name: "eslint", Date: "2026-01-01", Reason: "cve"},
{Name: "lodash", Date: "", Reason: ""},
},
})
want := "403\neslint\t2026-01-01\tcve\nlodash\t\t\n"
if got != want {
t.Fatalf("got %q want %q", got, want)
}
}

func TestFormatEvaluateStdoutStatusOnly(t *testing.T) {
got := formatEvaluateStdout(modulefirewall.RemoteResult{Status: 200})
if got != "200\n" {
t.Fatalf("%q", got)
}
}

func TestBlockBodyTruncates(t *testing.T) {
got := blockBody([]string{"a", "b", "c", "d"})
if !strings.Contains(got, "and 1 more") {
t.Fatalf("%q", got)
}
}
2 changes: 1 addition & 1 deletion src/commands/root.go
Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@ type RootCommand struct {
Cache cache.Root `cmd:"cache" help:"View and manage the ${app} cache."`
Config cfg.Root `cmd:"config" aliases:"cfg" help:"View and manage the ${app} configuration."`
Firewall firewall.Root `cmd:"firewall" aliases:"fw" help:"Manage NVM version/module/trust firewall policy."`
Malware malware.Root `cmd:"malware" hidden:"true" help:"Internal malware helpers."`
Malware malware.Root `cmd:"malware" help:"Show local malware verdicts."`
On Toggle `cmd:"on" help:"Manage Node.js with ${app}."`
Off Toggle `cmd:"off" help:"Stop managing Node.js with ${app}."`
Doctor Doctor `cmd:"doctor" help:"Detect and fix common ${app} issues." hidden:"true"`
Expand Down
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