github.com/google/uuid v1.6.0: NewDCEGroup, NewDCEPerson, NewDCESecurity

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify pkg:golang/github.com/google/uuid@v1.6.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/google/uuid@v1.6.0
Demonstrate these symbols/APIs:
  - github.com/google/uuid.NewDCEGroup
  - github.com/google/uuid.NewDCEPerson
  - github.com/google/uuid.NewDCESecurity
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@11.8.0
  - runtime: node@24.13.1

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:5f036ac8abe09a95c5855a4b4c4aa492120baafd8e22215e51c190b252b6ae7d","contract":["uuid.NewDCESecurity generates a Version 2 UUID for specified Domain and ID","uuid.NewDCESecurity sets Version 2 and RFC4122 variant and returns specified Domain and ID","uuid.NewDCEPerson generates a Version 2 UUID with Person domain","uuid.NewDCEGroup generates a Version 2 UUID with Group domain","uuid.NewDCESecurity produces a 16-byte UUID that round-trips with String() and Parse()"],"goal":"verify pkg:golang/github.com/google/uuid@v1.6.0","kind":"HOW","packages":["pkg:golang/github.com/google/uuid@v1.6.0"],"schemaVersion":1,"symbols":["github.com/google/uuid.NewDCEGroup","github.com/google/uuid.NewDCEPerson","github.com/google/uuid.NewDCESecurity"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","ecosystem":"golang","os":"windows","osVersionBucket":"11","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/github.com/google/uuid@v1.6.0"],"schemaVersion":1,"symbols":["github.com/google/uuid.NewDCEGroup","github.com/google/uuid.NewDCEPerson","github.com/google/uuid.NewDCESecurity"],"verifierAdapter":"golang@1"}

module sample

go 1.26.5

require github.com/google/uuid v1.6.0

github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=

package main

import (
	"fmt"

	"github.com/google/uuid"
)

// GenerateDCESecurity creates a DCE Security (Version 2) UUID for the specified domain and ID.
func GenerateDCESecurity(domain uuid.Domain, id uint32) (uuid.UUID, error) {
	return uuid.NewDCESecurity(domain, id)
}

// GenerateDCEPerson creates a DCE Security (Version 2) UUID for the Person domain.
func GenerateDCEPerson() (uuid.UUID, error) {
	return uuid.NewDCEPerson()
}

// GenerateDCEGroup creates a DCE Security (Version 2) UUID for the Group domain.
func GenerateDCEGroup() (uuid.UUID, error) {
	return uuid.NewDCEGroup()
}

func main() {
	personUUID, err := GenerateDCEPerson()
	if err != nil {
		fmt.Printf("Error generating DCE person UUID: %v\n", err)
		return
	}
	fmt.Printf("DCE Person UUID: %s (Version: %s, Domain: %v, ID: %d)\n",
		personUUID.String(), personUUID.Version().String(), personUUID.Domain(), personUUID.ID())

	groupUUID, err := GenerateDCEGroup()
	if err != nil {
		fmt.Printf("Error generating DCE group UUID: %v\n", err)
		return
	}
	fmt.Printf("DCE Group UUID: %s (Version: %s, Domain: %v, ID: %d)\n",
		groupUUID.String(), groupUUID.Version().String(), groupUUID.Domain(), groupUUID.ID())

	customUUID, err := GenerateDCESecurity(uuid.Org, 1001)
	if err != nil {
		fmt.Printf("Error generating custom DCE UUID: %v\n", err)
		return
	}
	fmt.Printf("Custom DCE Org UUID: %s (Version: %s, Domain: %v, ID: %d)\n",
		customUUID.String(), customUUID.Version().String(), customUUID.Domain(), customUUID.ID())
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/github.com/google/uuid@v1.6.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/google/uuid@v1.6.0"
  ],
  "symbols": [
    "github.com/google/uuid.NewDCEGroup",
    "github.com/google/uuid.NewDCEPerson",
    "github.com/google/uuid.NewDCESecurity"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@11.8.0",
    "runtime": "node@24.13.1"
  }
}

package main

import (
	"bytes"
	"fmt"
	"os"

	"github.com/google/uuid"
)

func main() {
	// Assertion 1: uuid.NewDCESecurity generates a Version 2 UUID for specified Domain and ID
	const testID = uint32(42)
	uSec, err := uuid.NewDCESecurity(uuid.Domain(uuid.Person), testID)
	if err != nil {
		fmt.Fprintf(os.Stderr, "FAIL: uuid.NewDCESecurity returned error: %v\n", err)
		os.Exit(1)
	}
	if uSec.Version() != 2 {
		fmt.Fprintf(os.Stderr, "FAIL: expected UUID version 2, got %d\n", uSec.Version())
		os.Exit(1)
	}

	// Assertion 2: uuid.NewDCESecurity sets Version 2 and RFC4122 variant and returns specified Domain and ID
	if uSec.Variant() != uuid.RFC4122 {
		fmt.Fprintf(os.Stderr, "FAIL: expected RFC4122 variant, got %v\n", uSec.Variant())
		os.Exit(1)
	}
	if uSec.Domain() != uuid.Person {
		fmt.Fprintf(os.Stderr, "FAIL: expected Person domain, got %v\n", uSec.Domain())
		os.Exit(1)
	}
	if uSec.ID() != testID {
		fmt.Fprintf(os.Stderr, "FAIL: expected ID %d, got %d\n", testID, uSec.ID())
		os.Exit(1)
	}

	// Assertion 3: uuid.NewDCEPerson generates a Version 2 UUID with Person domain
	uPerson, err := uuid.NewDCEPerson()
	if err != nil {
		fmt.Fprintf(os.Stderr, "FAIL: uuid.NewDCEPerson returned error: %v\n", err)
		os.Exit(1)
	}
	if uPerson.Version() != 2 {
		fmt.Fprintf(os.Stderr, "FAIL: uuid.NewDCEPerson expected version 2, got %d\n", uPerson.Version())
		os.Exit(1)
	}
	if uPerson.Domain() != uuid.Person {
		fmt.Fprintf(os.Stderr, "FAIL: uuid.NewDCEPerson expected Person domain, got %v\n", uPerson.Domain())
		os.Exit(1)
	}

	// Assertion 4: uuid.NewDCEGroup generates a Version 2 UUID with Group domain
	uGroup, err := uuid.NewDCEGroup()
	if err != nil {
		fmt.Fprintf(os.Stderr, "FAIL: uuid.NewDCEGroup returned error: %v\n", err)
		os.Exit(1)
	}
	if uGroup.Version() != 2 {
		fmt.Fprintf(os.Stderr, "FAIL: uuid.NewDCEGroup expected version 2, got %d\n", uGroup.Version())
		os.Exit(1)
	}
	if uGroup.Domain() != uuid.Group {
		fmt.Fprintf(os.Stderr, "FAIL: uuid.NewDCEGroup expected Group domain, got %v\n", uGroup.Domain())
		os.Exit(1)
	}

	// Assertion 5: uuid.NewDCESecurity produces a 16-byte UUID that round-trips with String() and Parse()
	parsed, err := uuid.Parse(uSec.String())
	if err != nil || !bytes.Equal(parsed[:], uSec[:]) {
		fmt.Fprintf(os.Stderr, "FAIL: uuid.Parse failed to round-trip DCE UUID: %v\n", err)
		os.Exit(1)
	}

	fmt.Println("PASS: all contract assertions passed for DCE Security UUID functions")
}