cloud.google.com/go/kms v1.35.0: kmspb.CryptoKey_ENCRYPT_DECRYPT

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 cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ENCRYPT_DECRYPT in pkg:golang/cloud.google.com/go/kms@v1.35.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/cloud.google.com/go/kms@v1.35.0
Demonstrate these symbols/APIs:
  - cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ENCRYPT_DECRYPT

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:b3c556b46ab34e59879fc5ead844f7ed8170fb26b587e6b258260bcb394bebb5","contract":["CryptoKey_ENCRYPT_DECRYPT is an enum constant of type CryptoKey_CryptoKeyPurpose with numerical value 1.","CryptoKey_ENCRYPT_DECRYPT string representation is ENCRYPT_DECRYPT and its Number() returns 1.","CryptoKey_CryptoKeyPurpose enum value maps correctly map between the name ENCRYPT_DECRYPT and value 1.","CryptoKey message Purpose field can be set to CryptoKey_ENCRYPT_DECRYPT and retrieved via GetPurpose.","CryptoKey with Purpose CryptoKey_ENCRYPT_DECRYPT serializes and deserializes consistently across protobuf binary and JSON formats."],"goal":"verify cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ENCRYPT_DECRYPT in pkg:golang/cloud.google.com/go/kms@v1.35.0","kind":"HOW","packages":["pkg:golang/cloud.google.com/go/kms@v1.35.0"],"schemaVersion":1,"symbols":["cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ENCRYPT_DECRYPT"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/cloud.google.com/go/kms@v1.35.0"],"schemaVersion":1,"subject":"pkg:golang/cloud.google.com/go/kms@v1.35.0","symbols":["cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ENCRYPT_DECRYPT"],"verifierAdapter":"golang@1"}

module sample

go 1.26.0

require (
	cloud.google.com/go/kms v1.35.0
	google.golang.org/protobuf v1.36.11
)

require (
	cloud.google.com/go/longrunning v1.2.0 // indirect
	golang.org/x/net v0.58.0 // indirect
	golang.org/x/sys v0.47.0 // indirect
	golang.org/x/text v0.41.0 // indirect
	google.golang.org/genproto/googleapis/api v0.0.0-20260630182238-925bb5da69e7 // indirect
	google.golang.org/genproto/googleapis/rpc v0.0.0-20260630182238-925bb5da69e7 // indirect
	google.golang.org/grpc v1.83.2 // indirect
)

cloud.google.com/go/kms v1.35.0 h1:nJ/ktaqspx1nPM9vIcO0SHbhqCAm8nvAxL1siuVgKm0=
cloud.google.com/go/kms v1.35.0/go.mod h1:0++71pIHvJL+GmMa8K4jOWFq7gNOX3jm2PRMSJwTKJw=
cloud.google.com/go/longrunning v1.2.0 h1:WjYH3YHBGCxGJP9M4dWGHBfXr/cFIjMkNgWcJj7/iMM=
cloud.google.com/go/longrunning v1.2.0/go.mod h1:5KMQALFGOCtFoi2xSOA1u3H7WKlhmckgiyFw7+LGQp0=
github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
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=
go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
go.opentelemetry.io/otel v1.44.0 h1:JjwHmHpA4iZ3wBxluu2fbbE7j4kqlE8jXyAyPXH7HqU=
go.opentelemetry.io/otel v1.44.0/go.mod h1:BMgjTHL9WPRlRjL2oZCBTL4whCGtXch2H4BhOPIAyYc=
go.opentelemetry.io/otel/metric v1.44.0 h1:1w0gILTcHdr3YI+ixLyjemwrVnsMURbTZFrSYCdDdmc=
go.opentelemetry.io/otel/metric v1.44.0/go.mod h1:8O7hanEPBNgEMmybD3s2VBKcgWOCsA6tzHBPODAiquo=
go.opentelemetry.io/otel/sdk v1.44.0 h1:nHYwb9lK+fJPU/dnT6s7W7Z8itMWyqrnVfbheVYrZ58=
go.opentelemetry.io/otel/sdk v1.44.0/go.mod h1:Osuydd3Se74nqjAKxid74N5eC+jfEqfTegHRnq58oK0=
go.opentelemetry.io/otel/sdk/metric v1.44.0 h1:3LlKgI+VjbVsjNRFZJZAJ30WjXC5VkNRks6si09iEfI=
go.opentelemetry.io/otel/sdk/metric v1.44.0/go.mod h1:5B5pMARnXxKhltooO4xUuCBorl65a4EpnTalObqOigA=
go.opentelemetry.io/otel/trace v1.44.0 h1:jxF5CsGYCe74MCRx2X4g7WsY/VBKRqqpNvXlX/6gtIk=
go.opentelemetry.io/otel/trace v1.44.0/go.mod h1:oLl1jrMQAVo6v3GAggN+1VH9VIz9iUSvW53sW1Q8PIE=
golang.org/x/net v0.58.0 h1:ynWG7rqYi4ccpTEuPZ2QGWHktVEM9DMCj9yzDE0Q7To=
golang.org/x/net v0.58.0/go.mod h1:YwCddHnFlT7eLQqVprV19OnhLGtc5xOKgE0RyqgfWAU=
golang.org/x/sys v0.47.0 h1:o7XGOvZQCADBQQ4Y7VNq2dRWQR7JmOUW8Kxx4ZsNgWs=
golang.org/x/sys v0.47.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
golang.org/x/text v0.41.0 h1:vz/seA0lnX87Othu2f/0L24RcgrXD9/YFTSuGjj3rH8=
golang.org/x/text v0.41.0/go.mod h1:jvf1O8ajNzZqhSrQBPbutR/EB83Cc0CFrezNQIwbb5M=
gonum.org/v1/gonum v0.17.0 h1:VbpOemQlsSMrYmn7T2OUvQ4dqxQXU+ouZFQsZOx50z4=
gonum.org/v1/gonum v0.17.0/go.mod h1:El3tOrEuMpv2UdMrbNlKEh9vd86bmQ6vqIcDwxEOc1E=
google.golang.org/genproto/googleapis/api v0.0.0-20260630182238-925bb5da69e7 h1:jQ9p21COKWjP3VwuFrNRiiOTMh3mPpN45R7SLrH/HUU=
google.golang.org/genproto/googleapis/api v0.0.0-20260630182238-925bb5da69e7/go.mod h1:KqHwBx2upmfa1XSi1WuRvC+2VGCLtooKkfmyvRbUmqA=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260630182238-925bb5da69e7 h1:eM/YSd5bBFagF51o1E745Ta7RwzpW0h+z+QDNZOgmQ8=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260630182238-925bb5da69e7/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
google.golang.org/grpc v1.83.2 h1:EManeRomTObA0BU7I8vXgg/78uE5MJ9M8B39EX2WscU=
google.golang.org/grpc v1.83.2/go.mod h1:YPI1hK3kDked6iHvgX3tR0y+nX/qpMFKhPgFsokw1S8=
google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=

package main

import (
	"fmt"

	"cloud.google.com/go/kms/apiv1/kmspb"
)

func main() {
	purpose := kmspb.CryptoKey_ENCRYPT_DECRYPT
	fmt.Printf("CryptoKey purpose: %s (%d)\n", purpose.String(), purpose.Number())

	key := &kmspb.CryptoKey{
		Purpose: purpose,
	}
	fmt.Printf("Key Purpose from getter: %s\n", key.GetPurpose().String())
}

{
  "schemaVersion": 1,
  "goal": "verify cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ENCRYPT_DECRYPT in pkg:golang/cloud.google.com/go/kms@v1.35.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/cloud.google.com/go/kms@v1.35.0"
  ],
  "symbols": [
    "cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ENCRYPT_DECRYPT"
  ]
}

package main

import (
	"fmt"
	"os"
	"strings"

	"cloud.google.com/go/kms/apiv1/kmspb"
	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"
)

func main() {
	if err := runTests(); err != nil {
		fmt.Fprintf(os.Stderr, "Contract test failed: %v\n", err)
		os.Exit(1)
	}
	fmt.Println("All contract tests passed successfully.")
}

func runTests() error {
	// 1. CryptoKey_ENCRYPT_DECRYPT is an enum constant of type CryptoKey_CryptoKeyPurpose with numerical value 1.
	{
		var purpose kmspb.CryptoKey_CryptoKeyPurpose = kmspb.CryptoKey_ENCRYPT_DECRYPT
		if int32(purpose) != 1 {
			return fmt.Errorf("test 1 failed: expected numeric value 1, got %d", int32(purpose))
		}
		if enumPtr := purpose.Enum(); enumPtr == nil || *enumPtr != kmspb.CryptoKey_ENCRYPT_DECRYPT {
			return fmt.Errorf("test 1 failed: Enum() returned invalid pointer")
		}
	}

	// 2. CryptoKey_ENCRYPT_DECRYPT string representation is ENCRYPT_DECRYPT and its Number() returns 1.
	{
		purpose := kmspb.CryptoKey_ENCRYPT_DECRYPT
		if str := purpose.String(); str != "ENCRYPT_DECRYPT" {
			return fmt.Errorf("test 2 failed: expected string 'ENCRYPT_DECRYPT', got '%s'", str)
		}
		if num := purpose.Number(); num != 1 {
			return fmt.Errorf("test 2 failed: expected Number() 1, got %d", num)
		}
	}

	// 3. CryptoKey_CryptoKeyPurpose enum value maps correctly map between the name ENCRYPT_DECRYPT and value 1.
	{
		name, ok := kmspb.CryptoKey_CryptoKeyPurpose_name[1]
		if !ok || name != "ENCRYPT_DECRYPT" {
			return fmt.Errorf("test 3 failed: name lookup for 1 got '%s', ok=%v", name, ok)
		}
		val, ok := kmspb.CryptoKey_CryptoKeyPurpose_value["ENCRYPT_DECRYPT"]
		if !ok || val != 1 {
			return fmt.Errorf("test 3 failed: value lookup for 'ENCRYPT_DECRYPT' got %d, ok=%v", val, ok)
		}
	}

	// 4. CryptoKey message Purpose field can be set to CryptoKey_ENCRYPT_DECRYPT and retrieved via GetPurpose.
	{
		key := &kmspb.CryptoKey{
			Purpose: kmspb.CryptoKey_ENCRYPT_DECRYPT,
		}
		if key.GetPurpose() != kmspb.CryptoKey_ENCRYPT_DECRYPT {
			return fmt.Errorf("test 4 failed: GetPurpose() got %v, expected %v", key.GetPurpose(), kmspb.CryptoKey_ENCRYPT_DECRYPT)
		}
		// Unset/nil key receiver safety
		var nilKey *kmspb.CryptoKey
		if nilKey.GetPurpose() != kmspb.CryptoKey_CRYPTO_KEY_PURPOSE_UNSPECIFIED {
			return fmt.Errorf("test 4 failed: nilKey.GetPurpose() expected UNSPECIFIED")
		}
	}

	// 5. CryptoKey with Purpose CryptoKey_ENCRYPT_DECRYPT serializes and deserializes consistently across protobuf binary and JSON formats.
	{
		key := &kmspb.CryptoKey{
			Purpose: kmspb.CryptoKey_ENCRYPT_DECRYPT,
		}

		// Protobuf binary round-trip
		data, err := proto.Marshal(key)
		if err != nil {
			return fmt.Errorf("test 5 (proto.Marshal) failed: %w", err)
		}

		unmarshaled := &kmspb.CryptoKey{}
		if err := proto.Unmarshal(data, unmarshaled); err != nil {
			return fmt.Errorf("test 5 (proto.Unmarshal) failed: %w", err)
		}
		if unmarshaled.GetPurpose() != kmspb.CryptoKey_ENCRYPT_DECRYPT {
			return fmt.Errorf("test 5 failed: binary roundtrip purpose mismatch: got %v", unmarshaled.GetPurpose())
		}

		// Protojson round-trip
		jsonData, err := protojson.Marshal(key)
		if err != nil {
			return fmt.Errorf("test 5 (protojson.Marshal) failed: %w", err)
		}
		if !strings.Contains(string(jsonData), "ENCRYPT_DECRYPT") {
			return fmt.Errorf("test 5 failed: JSON output missing 'ENCRYPT_DECRYPT': %s", string(jsonData))
		}

		jsonUnmarshaled := &kmspb.CryptoKey{}
		inputJSON := []byte(`{"purpose":"ENCRYPT_DECRYPT"}`)
		if err := protojson.Unmarshal(inputJSON, jsonUnmarshaled); err != nil {
			return fmt.Errorf("test 5 (protojson.Unmarshal) failed: %w", err)
		}
		if jsonUnmarshaled.GetPurpose() != kmspb.CryptoKey_ENCRYPT_DECRYPT {
			return fmt.Errorf("test 5 failed: JSON unmarshal purpose mismatch: got %v", jsonUnmarshaled.GetPurpose())
		}
	}

	return nil
}