mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-10-01 01:36:09 -04:00
241 lines
7.6 KiB
Go
241 lines
7.6 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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/*
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# configapi CLI
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A CLI to interact with the Attestationconfig API, a sub API of the Resource API.
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You can execute an e2e test by running: `bazel run //hack/configapi:configapi_e2e_test`.
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*/
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package main
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import (
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"encoding/json"
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"fmt"
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"os"
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"time"
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"github.com/edgelesssys/constellation/v2/internal/api/attestationconfigapi"
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"github.com/edgelesssys/constellation/v2/internal/constants"
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"github.com/edgelesssys/constellation/v2/internal/logger"
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"go.uber.org/zap"
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"github.com/edgelesssys/constellation/v2/internal/staticupload"
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"github.com/spf13/cobra"
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)
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const (
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awsRegion = "eu-central-1"
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awsBucket = "cdn-constellation-backend"
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distributionID = constants.CDNDefaultDistributionID
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envCosignPwd = "COSIGN_PASSWORD"
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envCosignPrivateKey = "COSIGN_PRIVATE_KEY"
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)
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var (
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// Cosign credentials.
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cosignPwd string
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privateKey string
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)
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func main() {
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if err := newRootCmd().Execute(); err != nil {
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os.Exit(1)
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}
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os.Exit(0)
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}
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// newRootCmd creates the root command.
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func newRootCmd() *cobra.Command {
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rootCmd := &cobra.Command{
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Use: "COSIGN_PASSWORD=$CPWD COSIGN_PRIVATE_KEY=$CKEY upload --version-file $FILE",
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Short: "Upload a set of versions specific to the azure-sev-snp attestation variant to the config api.",
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Long: fmt.Sprintf("Upload a set of versions specific to the azure-sev-snp attestation variant to the config api."+
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"Please authenticate with AWS through your preferred method (e.g. environment variables, CLI)"+
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"to be able to upload to S3. Set the %s and %s environment variables to authenticate with cosign.",
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envCosignPrivateKey, envCosignPwd,
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),
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PreRunE: envCheck,
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RunE: runCmd,
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}
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rootCmd.Flags().StringP("maa-claims-path", "t", "", "File path to a json file containing the MAA claims.")
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rootCmd.Flags().StringP("upload-date", "d", "", "upload a version with this date as version name.")
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rootCmd.PersistentFlags().StringP("region", "r", awsRegion, "region of the targeted bucket.")
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rootCmd.PersistentFlags().StringP("bucket", "b", awsBucket, "bucket targeted by all operations.")
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rootCmd.PersistentFlags().StringP("distribution", "i", distributionID, "cloudflare distribution used.")
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must(rootCmd.MarkFlagRequired("maa-claims-path"))
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rootCmd.AddCommand(newDeleteCmd())
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return rootCmd
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}
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func envCheck(_ *cobra.Command, _ []string) error {
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if os.Getenv(envCosignPrivateKey) == "" || os.Getenv(envCosignPwd) == "" {
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return fmt.Errorf("please set both %s and %s environment variables", envCosignPrivateKey, envCosignPwd)
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}
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cosignPwd = os.Getenv(envCosignPwd)
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privateKey = os.Getenv(envCosignPrivateKey)
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return nil
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}
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func runCmd(cmd *cobra.Command, _ []string) (retErr error) {
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ctx := cmd.Context()
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log := logger.New(logger.PlainLog, zap.DebugLevel).Named("attestationconfigapi")
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flags, err := parseCliFlags(cmd)
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if err != nil {
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return fmt.Errorf("parsing cli flags: %w", err)
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}
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cfg := staticupload.Config{
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Bucket: flags.bucket,
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Region: flags.region,
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DistributionID: flags.distribution,
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}
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log.Infof("Reading MAA claims from file: %s", flags.maaFilePath)
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maaClaimsBytes, err := os.ReadFile(flags.maaFilePath)
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if err != nil {
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return fmt.Errorf("reading MAA claims file: %w", err)
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}
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var maaTCB maaTokenTCBClaims
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if err = json.Unmarshal(maaClaimsBytes, &maaTCB); err != nil {
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return fmt.Errorf("unmarshalling MAA claims file: %w", err)
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}
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inputVersion := maaTCB.ToAzureSEVSNPVersion()
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log.Infof("Input version: %+v", inputVersion)
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latestAPIVersionAPI, err := attestationconfigapi.NewFetcher().FetchAzureSEVSNPVersionLatest(ctx, flags.uploadDate)
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if err != nil {
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return fmt.Errorf("fetching latest version: %w", err)
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}
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latestAPIVersion := latestAPIVersionAPI.AzureSEVSNPVersion
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isNewer, err := isInputNewerThanLatestAPI(inputVersion, latestAPIVersion)
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if err != nil {
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return fmt.Errorf("comparing versions: %w", err)
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}
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if !isNewer {
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log.Infof("Input version: %+v is not newer than latest API version: %+v", inputVersion, latestAPIVersion)
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return nil
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}
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log.Infof("Input version: %+v is newer than latest API version: %+v", inputVersion, latestAPIVersion)
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client, clientClose, err := attestationconfigapi.NewClient(ctx, cfg, []byte(cosignPwd), []byte(privateKey), false, log)
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defer func(retErr *error) {
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log.Infof("Invalidating cache. This may take some time")
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if err := clientClose(cmd.Context()); err != nil && retErr == nil {
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*retErr = fmt.Errorf("invalidating cache: %w", err)
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}
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}(&retErr)
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if err != nil {
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return fmt.Errorf("creating client: %w", err)
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}
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if err := client.UploadAzureSEVSNPVersion(ctx, inputVersion, flags.uploadDate); err != nil {
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return fmt.Errorf("uploading version: %w", err)
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}
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cmd.Printf("Successfully uploaded new Azure SEV-SNP version: %+v\n", inputVersion)
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return nil
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}
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type cliFlags struct {
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maaFilePath string
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uploadDate time.Time
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region string
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bucket string
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distribution string
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}
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func parseCliFlags(cmd *cobra.Command) (cliFlags, error) {
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maaFilePath, err := cmd.Flags().GetString("maa-claims-path")
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if err != nil {
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return cliFlags{}, fmt.Errorf("getting maa claims path: %w", err)
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}
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dateStr, err := cmd.Flags().GetString("upload-date")
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if err != nil {
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return cliFlags{}, fmt.Errorf("getting upload date: %w", err)
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}
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uploadDate := time.Now()
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if dateStr != "" {
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uploadDate, err = time.Parse(attestationconfigapi.VersionFormat, dateStr)
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if err != nil {
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return cliFlags{}, fmt.Errorf("parsing date: %w", err)
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}
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}
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region, err := cmd.Flags().GetString("region")
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if err != nil {
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return cliFlags{}, fmt.Errorf("getting region: %w", err)
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}
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bucket, err := cmd.Flags().GetString("bucket")
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if err != nil {
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return cliFlags{}, fmt.Errorf("getting bucket: %w", err)
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}
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distribution, err := cmd.Flags().GetString("distribution")
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if err != nil {
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return cliFlags{}, fmt.Errorf("getting distribution: %w", err)
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}
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return cliFlags{
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maaFilePath: maaFilePath,
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uploadDate: uploadDate,
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region: region,
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bucket: bucket,
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distribution: distribution,
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}, nil
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}
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// maaTokenTCBClaims describes the TCB information in a MAA token.
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type maaTokenTCBClaims struct {
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IsolationTEE struct {
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TEESvn uint8 `json:"x-ms-sevsnpvm-tee-svn"`
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SNPFwSvn uint8 `json:"x-ms-sevsnpvm-snpfw-svn"`
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MicrocodeSvn uint8 `json:"x-ms-sevsnpvm-microcode-svn"`
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BootloaderSvn uint8 `json:"x-ms-sevsnpvm-bootloader-svn"`
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} `json:"x-ms-isolation-tee"`
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}
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func (c maaTokenTCBClaims) ToAzureSEVSNPVersion() attestationconfigapi.AzureSEVSNPVersion {
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return attestationconfigapi.AzureSEVSNPVersion{
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TEE: c.IsolationTEE.TEESvn,
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SNP: c.IsolationTEE.SNPFwSvn,
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Microcode: c.IsolationTEE.MicrocodeSvn,
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Bootloader: c.IsolationTEE.BootloaderSvn,
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}
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}
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// isInputNewerThanLatestAPI compares all version fields with the latest API version and returns true if any input field is newer.
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func isInputNewerThanLatestAPI(input, latest attestationconfigapi.AzureSEVSNPVersion) (bool, error) {
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if input == latest {
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return false, nil
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}
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if input.TEE < latest.TEE {
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return false, fmt.Errorf("input TEE version: %d is older than latest API version: %d", input.TEE, latest.TEE)
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}
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if input.SNP < latest.SNP {
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return false, fmt.Errorf("input SNP version: %d is older than latest API version: %d", input.SNP, latest.SNP)
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}
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if input.Microcode < latest.Microcode {
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return false, fmt.Errorf("input Microcode version: %d is older than latest API version: %d", input.Microcode, latest.Microcode)
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}
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if input.Bootloader < latest.Bootloader {
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return false, fmt.Errorf("input Bootloader version: %d is older than latest API version: %d", input.Bootloader, latest.Bootloader)
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}
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return true, nil
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}
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func must(err error) {
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if err != nil {
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panic(err)
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}
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}
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