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

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_ASYMMETRIC_SIGN 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_ASYMMETRIC_SIGN

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.

package sample

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

// IsAsymmetricSign returns true if the purpose is CryptoKey_ASYMMETRIC_SIGN.
func IsAsymmetricSign(p kmspb.CryptoKey_CryptoKeyPurpose) bool {
	return p == kmspb.CryptoKey_ASYMMETRIC_SIGN
}

// GetAsymmetricSignPurpose returns the CryptoKey_ASYMMETRIC_SIGN enum value.
func GetAsymmetricSignPurpose() kmspb.CryptoKey_CryptoKeyPurpose {
	return kmspb.CryptoKey_ASYMMETRIC_SIGN
}

// NewAsymmetricSigningKey creates a CryptoKey proto with purpose CryptoKey_ASYMMETRIC_SIGN.
func NewAsymmetricSigningKey(name string) *kmspb.CryptoKey {
	return &kmspb.CryptoKey{
		Name:    name,
		Purpose: kmspb.CryptoKey_ASYMMETRIC_SIGN,
	}
}

{"case":{"caseId":"case:sha256:09c383a858c8041560a158ce0e34f6e5863e245ab23c3539c0836c51653daa28","contract":["kmspb.CryptoKey_ASYMMETRIC_SIGN equals 5","kmspb.CryptoKey_ASYMMETRIC_SIGN is of type CryptoKey_CryptoKeyPurpose","kmspb.CryptoKey_ASYMMETRIC_SIGN String() returns \"ASYMMETRIC_SIGN\"","CryptoKey_CryptoKeyPurpose_name maps 5 to \"ASYMMETRIC_SIGN\"","CryptoKey_CryptoKeyPurpose_value maps \"ASYMMETRIC_SIGN\" to 5","IsAsymmetricSign returns true for CryptoKey_ASYMMETRIC_SIGN and false for ENCRYPT_DECRYPT","GetAsymmetricSignPurpose returns CryptoKey_ASYMMETRIC_SIGN","NewAsymmetricSigningKey creates a CryptoKey with Purpose CryptoKey_ASYMMETRIC_SIGN"],"goal":"verify cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ASYMMETRIC_SIGN 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_ASYMMETRIC_SIGN"]},"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_ASYMMETRIC_SIGN"],"verifierAdapter":"golang@1"}

module sample

go 1.26.6

require cloud.google.com/go/kms v1.35.0

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
	google.golang.org/protobuf v1.36.11 // 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=

{
  "schemaVersion": 1,
  "goal": "verify cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ASYMMETRIC_SIGN 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_ASYMMETRIC_SIGN"
  ]
}

package main

import (
	"fmt"
	"os"

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

func main() {
	// Assertion 1: CryptoKey_ASYMMETRIC_SIGN has enum integer value 5
	if kmspb.CryptoKey_ASYMMETRIC_SIGN != 5 {
		fmt.Fprintf(os.Stderr, "expected kmspb.CryptoKey_ASYMMETRIC_SIGN to equal 5, got %d\n", int32(kmspb.CryptoKey_ASYMMETRIC_SIGN))
		os.Exit(1)
	}

	// Assertion 2: CryptoKey_ASYMMETRIC_SIGN is of type CryptoKey_CryptoKeyPurpose
	var p kmspb.CryptoKey_CryptoKeyPurpose = kmspb.CryptoKey_ASYMMETRIC_SIGN
	if p != kmspb.CryptoKey_ASYMMETRIC_SIGN {
		fmt.Fprintf(os.Stderr, "type mismatch for CryptoKey_CryptoKeyPurpose\n")
		os.Exit(1)
	}

	// Assertion 3: CryptoKey_ASYMMETRIC_SIGN String() returns "ASYMMETRIC_SIGN"
	if kmspb.CryptoKey_ASYMMETRIC_SIGN.String() != "ASYMMETRIC_SIGN" {
		fmt.Fprintf(os.Stderr, "expected String() to return \"ASYMMETRIC_SIGN\", got %q\n", kmspb.CryptoKey_ASYMMETRIC_SIGN.String())
		os.Exit(1)
	}

	// Assertion 4: CryptoKey_CryptoKeyPurpose_name mapping contains "ASYMMETRIC_SIGN" for value 5
	if name, ok := kmspb.CryptoKey_CryptoKeyPurpose_name[int32(kmspb.CryptoKey_ASYMMETRIC_SIGN)]; !ok || name != "ASYMMETRIC_SIGN" {
		fmt.Fprintf(os.Stderr, "expected CryptoKey_CryptoKeyPurpose_name[5] to be \"ASYMMETRIC_SIGN\", got %q\n", name)
		os.Exit(1)
	}

	// Assertion 5: CryptoKey_CryptoKeyPurpose_value mapping maps "ASYMMETRIC_SIGN" to 5
	if val, ok := kmspb.CryptoKey_CryptoKeyPurpose_value["ASYMMETRIC_SIGN"]; !ok || val != int32(kmspb.CryptoKey_ASYMMETRIC_SIGN) {
		fmt.Fprintf(os.Stderr, "expected CryptoKey_CryptoKeyPurpose_value[\"ASYMMETRIC_SIGN\"] to be 5, got %d\n", val)
		os.Exit(1)
	}

	// Assertion 6: IsAsymmetricSign helper returns true for CryptoKey_ASYMMETRIC_SIGN and false for ENCRYPT_DECRYPT
	if !sample.IsAsymmetricSign(kmspb.CryptoKey_ASYMMETRIC_SIGN) {
		fmt.Fprintf(os.Stderr, "expected IsAsymmetricSign(CryptoKey_ASYMMETRIC_SIGN) to be true\n")
		os.Exit(1)
	}
	if sample.IsAsymmetricSign(kmspb.CryptoKey_ENCRYPT_DECRYPT) {
		fmt.Fprintf(os.Stderr, "expected IsAsymmetricSign(CryptoKey_ENCRYPT_DECRYPT) to be false\n")
		os.Exit(1)
	}

	// Assertion 7: GetAsymmetricSignPurpose returns CryptoKey_ASYMMETRIC_SIGN
	if sample.GetAsymmetricSignPurpose() != kmspb.CryptoKey_ASYMMETRIC_SIGN {
		fmt.Fprintf(os.Stderr, "expected GetAsymmetricSignPurpose() to return CryptoKey_ASYMMETRIC_SIGN\n")
		os.Exit(1)
	}

	// Assertion 8: NewAsymmetricSigningKey creates a CryptoKey with Purpose CryptoKey_ASYMMETRIC_SIGN
	key := sample.NewAsymmetricSigningKey("projects/example-project/locations/global/keyRings/my-ring/cryptoKeys/my-key")
	if key.GetPurpose() != kmspb.CryptoKey_ASYMMETRIC_SIGN {
		fmt.Fprintf(os.Stderr, "expected key.GetPurpose() to be CryptoKey_ASYMMETRIC_SIGN, got %v\n", key.GetPurpose())
		os.Exit(1)
	}

	fmt.Println("All cloud.google.com/go/kms/apiv1/kmspb.CryptoKey_ASYMMETRIC_SIGN contract assertions passed.")
}