cloud.google.com/go/kms v1.35.0: kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256

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.CryptoKeyVersion_EC_SIGN_P256_SHA256 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.CryptoKeyVersion_EC_SIGN_P256_SHA256

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:sha256:74e46b2921b09a668c99c88e215c00bad2395f314ef043314abc779e571a61d4","contract":["kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 evaluates to enum constant value 12 and formats to string \"EC_SIGN_P256_SHA256\"","kmspb.CryptoKeyVersion_CryptoKeyVersionAlgorithm_value maps \"EC_SIGN_P256_SHA256\" to 12 and kmspb.CryptoKeyVersion_CryptoKeyVersionAlgorithm_name maps 12 to \"EC_SIGN_P256_SHA256\"","CryptoKeyVersion and CryptoKeyVersionTemplate protobuf messages retain kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 across assignment and protobuf serialization","kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 implements protoreflect.Enum with EnumNumber 12 and valid descriptor"],"goal":"verify cloud.google.com/go/kms/apiv1/kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 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.CryptoKeyVersion_EC_SIGN_P256_SHA256"]},"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.CryptoKeyVersion_EC_SIGN_P256_SHA256"],"verifierAdapter":"golang@1"}

module sample

go 1.26.0

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=

package main

import (
	"fmt"

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

func main() {
	algo := kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256
	fmt.Printf("KMS CryptoKeyVersion Algorithm: %s (%d)\n", algo.String(), int32(algo))

	version := &kmspb.CryptoKeyVersion{
		Algorithm: algo,
	}
	fmt.Printf("Configured version algorithm: %v\n", version.GetAlgorithm())
}

{
  "schemaVersion": 1,
  "goal": "verify cloud.google.com/go/kms/apiv1/kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 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.CryptoKeyVersion_EC_SIGN_P256_SHA256"
  ]
}

package main

import (
	"fmt"
	"os"

	kmspb "cloud.google.com/go/kms/apiv1/kmspb"
	"google.golang.org/protobuf/proto"
	"google.golang.org/protobuf/reflect/protoreflect"
)

func main() {
	// Assertion 1: kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 evaluates to enum constant value 12 and formats to string "EC_SIGN_P256_SHA256"
	{
		algo := kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256
		if int32(algo) != 12 {
			fmt.Fprintf(os.Stderr, "Assertion 1 failed: expected numeric value 12, got %d\n", int32(algo))
			os.Exit(1)
		}
		if algo.String() != "EC_SIGN_P256_SHA256" {
			fmt.Fprintf(os.Stderr, "Assertion 1 failed: expected string representation \"EC_SIGN_P256_SHA256\", got %q\n", algo.String())
			os.Exit(1)
		}
	}

	// Assertion 2: kmspb.CryptoKeyVersion_CryptoKeyVersionAlgorithm_value maps "EC_SIGN_P256_SHA256" to integer 12 and kmspb.CryptoKeyVersion_CryptoKeyVersionAlgorithm_name maps 12 to "EC_SIGN_P256_SHA256"
	{
		val, exists := kmspb.CryptoKeyVersion_CryptoKeyVersionAlgorithm_value["EC_SIGN_P256_SHA256"]
		if !exists || val != 12 {
			fmt.Fprintf(os.Stderr, "Assertion 2 failed: expected value map to contain EC_SIGN_P256_SHA256=12, got val=%d, exists=%v\n", val, exists)
			os.Exit(1)
		}
		name, exists := kmspb.CryptoKeyVersion_CryptoKeyVersionAlgorithm_name[12]
		if !exists || name != "EC_SIGN_P256_SHA256" {
			fmt.Fprintf(os.Stderr, "Assertion 2 failed: expected name map to contain 12=\"EC_SIGN_P256_SHA256\", got name=%q, exists=%v\n", name, exists)
			os.Exit(1)
		}
	}

	// Assertion 3: CryptoKeyVersion and CryptoKeyVersionTemplate protobuf messages retain kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 as their configured algorithm field
	{
		version := &kmspb.CryptoKeyVersion{
			Algorithm: kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256,
		}
		if version.GetAlgorithm() != kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 {
			fmt.Fprintf(os.Stderr, "Assertion 3 failed: expected version algorithm EC_SIGN_P256_SHA256, got %v\n", version.GetAlgorithm())
			os.Exit(1)
		}

		template := &kmspb.CryptoKeyVersionTemplate{
			Algorithm: kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256,
		}
		if template.GetAlgorithm() != kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 {
			fmt.Fprintf(os.Stderr, "Assertion 3 failed: expected template algorithm EC_SIGN_P256_SHA256, got %v\n", template.GetAlgorithm())
			os.Exit(1)
		}

		marshaled, err := proto.Marshal(version)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Assertion 3 failed: proto.Marshal error: %v\n", err)
			os.Exit(1)
		}
		unmarshaled := &kmspb.CryptoKeyVersion{}
		if err := proto.Unmarshal(marshaled, unmarshaled); err != nil {
			fmt.Fprintf(os.Stderr, "Assertion 3 failed: proto.Unmarshal error: %v\n", err)
			os.Exit(1)
		}
		if unmarshaled.GetAlgorithm() != kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 {
			fmt.Fprintf(os.Stderr, "Assertion 3 failed: unmarshaled algorithm mismatch: got %v\n", unmarshaled.GetAlgorithm())
			os.Exit(1)
		}
	}

	// Assertion 4: kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256 implements protoreflect.Enum with valid descriptor and matching EnumNumber
	{
		algo := kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256
		var enumVal protoreflect.Enum = algo
		if enumVal.Number() != protoreflect.EnumNumber(12) {
			fmt.Fprintf(os.Stderr, "Assertion 4 failed: expected EnumNumber 12, got %v\n", enumVal.Number())
			os.Exit(1)
		}
		desc := algo.Descriptor()
		if desc == nil {
			fmt.Fprintf(os.Stderr, "Assertion 4 failed: Descriptor() returned nil\n")
			os.Exit(1)
		}
		if string(desc.FullName()) != "google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionAlgorithm" {
			fmt.Fprintf(os.Stderr, "Assertion 4 failed: unexpected descriptor full name: %s\n", desc.FullName())
			os.Exit(1)
		}
	}

	fmt.Println("PASS: all CryptoKeyVersion_EC_SIGN_P256_SHA256 contract assertions passed")
}