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Implement basic secrets architecture, use it for garage RPC secret

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This commit is contained in:
Brian Picciano 2024-07-13 14:34:06 +02:00
parent b5059be7fa
commit 56f796e3fb
20 changed files with 455 additions and 121 deletions
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1
go/admin/admin.go
View File

@ -25,7 +25,6 @@ type Admin struct {
}
Garage struct {
RPCSecret string
GlobalBucketS3APICredentials garage.S3APICredentials
}
}

4
go/bootstrap/bootstrap.go
View File

@ -30,10 +30,6 @@ func AppDirPath(appDirPath string) string {
// Garage contains parameters needed to connect to and use the garage cluster.
type Garage struct {
// TODO this should be part of some new configuration section related to
// secrets which may or may not be granted to this host
RPCSecret string
AdminToken string
// TODO this should be part of admin.CreationParams

27
go/bootstrap/garage.go
View File

@ -4,24 +4,6 @@ import (
"isle/garage"
)
// GarageClientParams contains all the data needed to instantiate garage
// clients.
type GarageClientParams struct {
Peer garage.RemotePeer
GlobalBucketS3APICredentials garage.S3APICredentials
RPCSecret string
}
// GlobalBucketS3APIClient returns an S3 client pre-configured with access to
// the global bucket.
func (p GarageClientParams) GlobalBucketS3APIClient() garage.S3APIClient {
var (
addr = p.Peer.S3APIAddr()
creds = p.GlobalBucketS3APICredentials
)
return garage.NewS3APIClient(addr, creds)
}
// GaragePeers returns a Peer for each known garage instance in the network.
func (b Bootstrap) GaragePeers() []garage.RemotePeer {
@ -69,12 +51,3 @@ func (b Bootstrap) ChooseGaragePeer() garage.RemotePeer {
panic("no garage instances configured")
}
// GarageClientParams returns a GarageClientParams.
func (b Bootstrap) GarageClientParams() GarageClientParams {
return GarageClientParams{
Peer: b.ChooseGaragePeer(),
GlobalBucketS3APICredentials: b.Garage.GlobalBucketS3APICredentials,
RPCSecret: b.Garage.RPCSecret,
}
}

11
go/cmd/entrypoint/garage.go
View File

@ -1,12 +1,13 @@
package main
import (
"errors"
"fmt"
"os"
"path/filepath"
"syscall"
"isle/bootstrap"
"isle/daemon"
)
// minio-client keeps a configuration directory which contains various pieces of
@ -52,7 +53,7 @@ var subCmdGarageMC = subCmd{
return fmt.Errorf("parsing flags: %w", err)
}
var clientParams bootstrap.GarageClientParams
var clientParams daemon.GarageClientParams
err := subCmdCtx.daemonRCPClient.Call(
subCmdCtx.ctx, &clientParams, "GetGarageClientParams", nil,
)
@ -119,7 +120,7 @@ var subCmdGarageCLI = subCmd{
descr: "Runs the garage binary, automatically configured to point to the garage sub-process of a running isle daemon",
do: func(subCmdCtx subCmdCtx) error {
var clientParams bootstrap.GarageClientParams
var clientParams daemon.GarageClientParams
err := subCmdCtx.daemonRCPClient.Call(
subCmdCtx.ctx, &clientParams, "GetGarageClientParams", nil,
)
@ -127,6 +128,10 @@ var subCmdGarageCLI = subCmd{
return fmt.Errorf("calling GetGarageClientParams: %w", err)
}
if clientParams.RPCSecret == "" {
return errors.New("this host does not have the garage RPC secret")
}
var (
binPath = binPath("garage")
args = append([]string{"garage"}, subCmdCtx.args...)

24
go/daemon/child_garage.go
View File

@ -101,7 +101,7 @@ func bootstrapGarageHostForAlloc(
}
func garageWriteChildConfig(
runtimeDirPath string,
rpcSecret, runtimeDirPath string,
hostBootstrap bootstrap.Bootstrap,
alloc ConfigStorageAllocation,
) (
@ -129,7 +129,7 @@ func garageWriteChildConfig(
MetaPath: alloc.MetaPath,
DataPath: alloc.DataPath,
RPCSecret: hostBootstrap.Garage.RPCSecret,
RPCSecret: rpcSecret,
AdminToken: hostBootstrap.Garage.AdminToken,
LocalPeer: peer,
@ -144,20 +144,28 @@ func garageWriteChildConfig(
}
func garagePmuxProcConfigs(
ctx context.Context,
logger *mlog.Logger,
runtimeDirPath, binDirPath string,
rpcSecret, runtimeDirPath, binDirPath string,
daemonConfig Config,
hostBootstrap bootstrap.Bootstrap,
) (
[]pmuxlib.ProcessConfig, error,
) {
var (
pmuxProcConfigs []pmuxlib.ProcessConfig
allocs = daemonConfig.Storage.Allocations
)
var pmuxProcConfigs []pmuxlib.ProcessConfig
if len(allocs) > 0 && rpcSecret == "" {
logger.WarnString(ctx, "Not starting garage instances for storage allocations, missing garage RPC secret")
return nil, nil
}
for _, alloc := range daemonConfig.Storage.Allocations {
for _, alloc := range allocs {
childConfigPath, err := garageWriteChildConfig(
runtimeDirPath, hostBootstrap, alloc,
rpcSecret, runtimeDirPath, hostBootstrap, alloc,
)
if err != nil {
return nil, fmt.Errorf("writing child config file for alloc %+v: %w", alloc, err)
@ -176,9 +184,7 @@ func garagePmuxProcConfigs(
return pmuxProcConfigs, nil
}
// TODO don't expose this publicly once cluster creation is done via Daemon
// interface.
func GarageApplyLayout(
func garageApplyLayout(
ctx context.Context,
logger *mlog.Logger,
daemonConfig Config,

11
go/daemon/child_pmux.go
View File

@ -9,8 +9,13 @@ import (
)
func (c *Children) newPmuxConfig(
binDirPath string, daemonConfig Config, hostBootstrap bootstrap.Bootstrap,
) (pmuxlib.Config, error) {
ctx context.Context,
garageRPCSecret, binDirPath string,
daemonConfig Config,
hostBootstrap bootstrap.Bootstrap,
) (
pmuxlib.Config, error,
) {
nebulaPmuxProcConfig, err := nebulaPmuxProcConfig(
c.opts.EnvVars.RuntimeDirPath,
binDirPath,
@ -34,7 +39,9 @@ func (c *Children) newPmuxConfig(
}
garagePmuxProcConfigs, err := garagePmuxProcConfigs(
ctx,
c.logger,
garageRPCSecret,
c.opts.EnvVars.RuntimeDirPath,
binDirPath,
daemonConfig,

16
go/daemon/children.go
View File

@ -2,8 +2,11 @@ package daemon
import (
"context"
"errors"
"fmt"
"isle/bootstrap"
"isle/garage"
"isle/secrets"
"code.betamike.com/micropelago/pmux/pmuxlib"
"dev.mediocregopher.com/mediocre-go-lib.git/mlog"
@ -27,15 +30,22 @@ type Children struct {
func NewChildren(
ctx context.Context,
logger *mlog.Logger,
binDirPath string,
secretsStore secrets.Store,
daemonConfig Config,
hostBootstrap bootstrap.Bootstrap,
binDirPath string,
opts *Opts,
) (
*Children, error,
) {
opts = opts.withDefaults()
logger.Info(ctx, "Loading secrets")
garageRPCSecret, err := garage.GetRPCSecret(ctx, secretsStore)
if err != nil && !errors.Is(err, secrets.ErrNotFound) {
return nil, fmt.Errorf("loading garage RPC secret: %w", err)
}
pmuxCtx, pmuxCancelFn := context.WithCancel(context.Background())
c := &Children{
@ -45,7 +55,9 @@ func NewChildren(
pmuxStoppedCh: make(chan struct{}),
}
pmuxConfig, err := c.newPmuxConfig(binDirPath, daemonConfig, hostBootstrap)
pmuxConfig, err := c.newPmuxConfig(
ctx, garageRPCSecret, binDirPath, daemonConfig, hostBootstrap,
)
if err != nil {
return nil, fmt.Errorf("generating pmux config: %w", err)
}

74
go/daemon/daemon.go
View File

@ -13,8 +13,10 @@ import (
"isle/bootstrap"
"isle/garage"
"isle/nebula"
"isle/secrets"
"net/netip"
"os"
"path/filepath"
"sync"
"time"
@ -53,6 +55,10 @@ type Daemon interface {
// GetBootstraps returns the currently active Bootstrap.
GetBootstrap(context.Context) (bootstrap.Bootstrap, error)
// GetGarageClientParams returns a GarageClientParams for the current
// network state.
GetGarageClientParams(context.Context) (GarageClientParams, error)
// RemoveHost removes the host of the given name from the network.
RemoveHost(context.Context, nebula.HostName) error
@ -134,6 +140,8 @@ type daemon struct {
envBinDirPath string
opts *Opts
secretsStore secrets.Store
l sync.RWMutex
state int
children *Children
@ -181,6 +189,17 @@ func NewDaemon(
return nil, fmt.Errorf("initializing daemon directories: %w", err)
}
var (
secretsPath = filepath.Join(d.opts.EnvVars.StateDirPath, "secrets")
err error
)
if d.secretsStore, err = secrets.NewFSStore(secretsPath); err != nil {
return nil, fmt.Errorf(
"initializing secrets store at %q: %w", secretsPath, err,
)
}
currBootstrap, err := bootstrap.FromFile(bootstrapFilePath)
if errors.Is(err, fs.ErrNotExist) {
// daemon has never had a network created or joined
@ -276,7 +295,7 @@ func (d *daemon) checkBootstrap(
thisHost := hostBootstrap.ThisHost()
newHosts, err := getGarageBootstrapHosts(ctx, d.logger, hostBootstrap)
newHosts, err := d.getGarageBootstrapHosts(ctx, d.logger, hostBootstrap)
if err != nil {
return bootstrap.Bootstrap{}, false, fmt.Errorf("getting hosts from garage: %w", err)
}
@ -348,7 +367,7 @@ func (d *daemon) postInit(ctx context.Context) bool {
d.logger,
"Applying garage layout",
func(ctx context.Context) error {
return GarageApplyLayout(
return garageApplyLayout(
ctx, d.logger, d.daemonConfig, d.currBootstrap,
)
},
@ -402,7 +421,7 @@ func (d *daemon) postInit(ctx context.Context) bool {
d.logger,
"Updating host info in garage",
func(ctx context.Context) error {
return putGarageBoostrapHost(ctx, d.logger, d.currBootstrap)
return d.putGarageBoostrapHost(ctx, d.logger, d.currBootstrap)
},
) {
return false
@ -437,15 +456,16 @@ func (d *daemon) restartLoop(ctx context.Context, readyCh chan<- struct{}) {
children, err := NewChildren(
ctx,
d.logger.WithNamespace("children"),
d.envBinDirPath,
d.secretsStore,
d.daemonConfig,
d.currBootstrap,
d.envBinDirPath,
d.opts,
)
if errors.Is(err, context.Canceled) {
return
} else if err != nil {
d.logger.Error(ctx, "failed to initialize daemon", err)
d.logger.Error(ctx, "failed to initialize child processes", err)
if !wait(1 * time.Second) {
return
}
@ -502,7 +522,8 @@ func (d *daemon) CreateNetwork(
return admin.Admin{}, fmt.Errorf("creating nebula CA cert: %w", err)
}
adm := admin.Admin{
var (
adm = admin.Admin{
CreationParams: admin.CreationParams{
ID: randStr(32),
Name: name,
@ -510,10 +531,17 @@ func (d *daemon) CreateNetwork(
},
}
garageBootstrap := bootstrap.Garage{
RPCSecret: randStr(32),
garageBootstrap = bootstrap.Garage{
AdminToken: randStr(32),
}
)
garageRPCSecret := randStr(32)
err = garage.SetRPCSecret(ctx, d.secretsStore, garageRPCSecret)
if err != nil {
return admin.Admin{}, fmt.Errorf("storing garage RPC secret: %w", err)
}
hostBootstrap, err := bootstrap.New(
nebulaCACreds,
@ -563,7 +591,6 @@ func (d *daemon) CreateNetwork(
d.l.RUnlock()
adm.Nebula.CACredentials = nebulaCACreds
adm.Garage.RPCSecret = hostBootstrap.Garage.RPCSecret
adm.Garage.GlobalBucketS3APICredentials = garageGlobalBucketCreds
return adm, nil
@ -605,6 +632,20 @@ func (d *daemon) GetBootstrap(ctx context.Context) (bootstrap.Bootstrap, error)
})
}
func (d *daemon) GetGarageClientParams(
ctx context.Context,
) (
GarageClientParams, error,
) {
return withCurrBootstrap(d, func(
currBootstrap bootstrap.Bootstrap,
) (
GarageClientParams, error,
) {
return d.getGarageClientParams(ctx, currBootstrap)
})
}
func (d *daemon) RemoveHost(ctx context.Context, hostName nebula.HostName) error {
// TODO RemoveHost should publish a certificate revocation for the host
// being removed.
@ -613,7 +654,12 @@ func (d *daemon) RemoveHost(ctx context.Context, hostName nebula.HostName) error
) (
struct{}, error,
) {
client := currBootstrap.GarageClientParams().GlobalBucketS3APIClient()
garageClientParams, err := d.getGarageClientParams(ctx, currBootstrap)
if err != nil {
return struct{}{}, fmt.Errorf("get garage client params: %w", err)
}
client := garageClientParams.GlobalBucketS3APIClient()
return struct{}{}, removeGarageBootstrapHost(ctx, client, hostName)
})
return err
@ -642,15 +688,9 @@ func (d *daemon) CreateHost(
) (
bootstrap.Bootstrap, error,
) {
var (
garageRPCSecret = currBootstrap.Garage.RPCSecret
garageGlobalBucketS3APICreds = currBootstrap.Garage.GlobalBucketS3APICredentials
)
// TODO check if garageRPCSecret is actually set
garageGlobalBucketS3APICreds := currBootstrap.Garage.GlobalBucketS3APICredentials
garageBootstrap := bootstrap.Garage{
RPCSecret: garageRPCSecret,
AdminToken: randStr(32),
GlobalBucketS3APICredentials: garageGlobalBucketS3APICreds,
}

28
go/daemon/env.go
View File

@ -22,34 +22,6 @@ type EnvVars struct {
func (e EnvVars) init() error {
var errs []error
mkDir := func(path string) error {
{
parentPath := filepath.Dir(path)
parentInfo, err := os.Stat(parentPath)
if err != nil {
return fmt.Errorf("checking parent path %q: %w", parentPath, err)
} else if !parentInfo.IsDir() {
return fmt.Errorf("%q is not a directory", parentPath)
}
}
info, err := os.Stat(path)
if errors.Is(err, fs.ErrNotExist) {
// fine
} else if err != nil {
return fmt.Errorf("checking path: %w", err)
} else if !info.IsDir() {
return fmt.Errorf("path is not a directory")
} else {
return nil
}
if err := os.Mkdir(path, 0700); err != nil {
return fmt.Errorf("creating directory: %w", err)
}
return nil
}
if err := mkDir(e.RuntimeDirPath); err != nil {
errs = append(errs, fmt.Errorf(
"creating runtime directory %q: %w",

47
go/daemon/garage_client_params.go Normal file
View File

@ -0,0 +1,47 @@
package daemon
import (
"context"
"errors"
"fmt"
"isle/bootstrap"
"isle/garage"
"isle/secrets"
)
// GarageClientParams contains all the data needed to instantiate garage
// clients.
type GarageClientParams struct {
Peer garage.RemotePeer
GlobalBucketS3APICredentials garage.S3APICredentials
// RPCSecret may be empty, if the secret is not available on the host.
RPCSecret string
}
func (d *daemon) getGarageClientParams(
ctx context.Context, currBootstrap bootstrap.Bootstrap,
) (
GarageClientParams, error,
) {
rpcSecret, err := garage.GetRPCSecret(ctx, d.secretsStore)
if err != nil && !errors.Is(err, secrets.ErrNotFound) {
return GarageClientParams{}, fmt.Errorf("getting garage rpc secret: %w", err)
}
return GarageClientParams{
Peer: currBootstrap.ChooseGaragePeer(),
GlobalBucketS3APICredentials: currBootstrap.Garage.GlobalBucketS3APICredentials,
RPCSecret: rpcSecret,
}, nil
}
// GlobalBucketS3APIClient returns an S3 client pre-configured with access to
// the global bucket.
func (p GarageClientParams) GlobalBucketS3APIClient() garage.S3APIClient {
var (
addr = p.Peer.S3APIAddr()
creds = p.GlobalBucketS3APICredentials
)
return garage.NewS3APIClient(addr, creds)
}

28
go/daemon/global_bucket.go
View File

@ -62,24 +62,28 @@ func garageInitializeGlobalBucket(
// putGarageBoostrapHost places the <hostname>.json.signed file for this host
// into garage so that other hosts are able to see relevant configuration for
// it.
func putGarageBoostrapHost(
func (d *daemon) putGarageBoostrapHost(
ctx context.Context, logger *mlog.Logger, currBootstrap bootstrap.Bootstrap,
) error {
garageClientParams, err := d.getGarageClientParams(ctx, currBootstrap)
if err != nil {
return fmt.Errorf("getting garage client params: %w", err)
}
var (
b = currBootstrap
host = b.ThisHost()
client = b.GarageClientParams().GlobalBucketS3APIClient()
host = currBootstrap.ThisHost()
client = garageClientParams.GlobalBucketS3APIClient()
)
configured, err := nebula.Sign(
host.HostConfigured, b.PrivateCredentials.SigningPrivateKey,
host.HostConfigured, currBootstrap.PrivateCredentials.SigningPrivateKey,
)
if err != nil {
return fmt.Errorf("signing host configured data: %w", err)
}
hostB, err := json.Marshal(bootstrap.AuthenticatedHost{
Assigned: b.SignedHostAssigned,
Assigned: currBootstrap.SignedHostAssigned,
Configured: configured,
})
if err != nil {
@ -107,14 +111,18 @@ func putGarageBoostrapHost(
return nil
}
func getGarageBootstrapHosts(
func (d *daemon) getGarageBootstrapHosts(
ctx context.Context, logger *mlog.Logger, currBootstrap bootstrap.Bootstrap,
) (
map[nebula.HostName]bootstrap.Host, error,
) {
garageClientParams, err := d.getGarageClientParams(ctx, currBootstrap)
if err != nil {
return nil, fmt.Errorf("getting garage client params: %w", err)
}
var (
b = currBootstrap
client = b.GarageClientParams().GlobalBucketS3APIClient()
client = garageClientParams.GlobalBucketS3APIClient()
hosts = map[nebula.HostName]bootstrap.Host{}
objInfoCh = client.ListObjects(
@ -152,7 +160,7 @@ func getGarageBootstrapHosts(
continue
}
host, err := authedHost.Unwrap(b.CAPublicCredentials)
host, err := authedHost.Unwrap(currBootstrap.CAPublicCredentials)
if err != nil {
logger.Warn(ctx, "Host could not be authenticated", err)
}

36
go/daemon/jigs.go
View File

@ -4,6 +4,11 @@ import (
"context"
"crypto/rand"
"encoding/hex"
"errors"
"fmt"
"io/fs"
"os"
"path/filepath"
"time"
"dev.mediocregopher.com/mediocre-go-lib.git/mlog"
@ -38,3 +43,34 @@ func randStr(l int) string {
}
return hex.EncodeToString(b)
}
// mkDir is like os.Mkdir but it returns better error messages. If the directory
// already exists then nil is returned.
func mkDir(path string) error {
{
parentPath := filepath.Dir(path)
parentInfo, err := os.Stat(parentPath)
if err != nil {
return fmt.Errorf("checking fs node of parent %q: %w", parentPath, err)
} else if !parentInfo.IsDir() {
return fmt.Errorf("%q is not a directory", parentPath)
}
}
info, err := os.Stat(path)
if errors.Is(err, fs.ErrNotExist) {
// fine
} else if err != nil {
return fmt.Errorf("checking fs node: %w", err)
} else if !info.IsDir() {
return fmt.Errorf("exists but is not a directory")
} else {
return nil
}
if err := os.Mkdir(path, 0700); err != nil {
return fmt.Errorf("creating directory: %w", err)
}
return nil
}

15
go/daemon/rpc.go
View File

@ -87,21 +87,14 @@ func (r *RPC) GetHosts(
return GetHostsResult{hosts}, nil
}
// GetGarageClientParams returns a GarageClientParams which can be used to
// interact with garage.
// GetGarageClientParams passes the call through to the Daemon method of the
// same name.
func (r *RPC) GetGarageClientParams(
ctx context.Context, req struct{},
) (
bootstrap.GarageClientParams, error,
GarageClientParams, error,
) {
b, err := r.daemon.GetBootstrap(ctx)
if err != nil {
return bootstrap.GarageClientParams{}, fmt.Errorf(
"retrieving bootstrap: %w", err,
)
}
return b.GarageClientParams(), nil
return r.daemon.GetGarageClientParams(ctx)
}
// GetNebulaCAPublicCredentials returns the CAPublicCredentials for the network.

2
go/garage/garage.go
View File

@ -11,6 +11,8 @@ const (
// accessible to all hosts in the network.
GlobalBucket = "global-shared"
// GlobalBucketS3APICredentialsName is the main alias of the shared API key
// used to write to the global bucket.
GlobalBucketS3APICredentialsName = "global-shared-key"
// ReplicationFactor indicates the replication factor set on the garage

20
go/garage/secrets.go Normal file
View File

@ -0,0 +1,20 @@
package garage
import "isle/secrets"
var (
rpcSecretSecretID = secrets.NewID("garage", "rpc-secret")
globalBucketS3APICredentialsSecretID = secrets.NewID("garage", "global-bucket-s3-api-credentials")
)
// Get/Set functions for garage-related secrets.
var (
GetRPCSecret, SetRPCSecret = secrets.GetSetFunctions[string](
rpcSecretSecretID,
)
GetGlobalBucketS3APICredentials,
SetGlobalBucketS3APICredentials = secrets.GetSetFunctions[S3APICredentials](
globalBucketS3APICredentialsSecretID,
)
)

14
go/nebula/secrets.go Normal file
View File

@ -0,0 +1,14 @@
package nebula
import (
"isle/secrets"
)
var (
caSigningPrivateKeySecretID = secrets.NewID("nebula", "ca-signing-private-key")
)
// Get/Set functions for the CA SigningPrivateKey secret.
var GetCASigningPrivateKey, SetCASigningPrivateKey = secrets.GetSetFunctions[SigningPrivateKey](
caSigningPrivateKeySecretID,
)

13
go/secrets/secrets.go Normal file
View File

@ -0,0 +1,13 @@
// Package secrets manages the storage and distributions of secret values that
// hosts need to perform various actions.
package secrets
import "fmt"
// ID is a unique identifier for a Secret.
type ID string
// NewID returns a new ID within the given namespace.
func NewID(namespace, id string) ID {
return ID(fmt.Sprintf("%s-%s", namespace, id))
}

66
go/secrets/store.go Normal file
View File

@ -0,0 +1,66 @@
package secrets
import (
"context"
"errors"
"fmt"
)
// ErrNotFound is returned when an ID could not be found.
var ErrNotFound = errors.New("not found")
// Store is used to persist and retrieve secrets. If a Store serializes a
// payload it will do so using JSON.
type Store interface {
// Set stores the secret payload of the given ID.
Set(context.Context, ID, any) error
// Get retrieves the secret of the given ID, setting it into the given
// pointer value, or returns ErrNotFound.
Get(context.Context, any, ID) error
}
// GetSetFunctions returns a Get/Set function pair for the given ID and payload
// type.
func GetSetFunctions[T any](
id ID,
) (
func(context.Context, Store) (T, error), // Get
func(context.Context, Store, T) error, // Set
) {
var (
get = func(ctx context.Context, store Store) (T, error) {
var v T
err := store.Get(ctx, &v, id)
return v, err
}
set = func(ctx context.Context, store Store, v T) error {
return store.Set(ctx, id, v)
}
)
return get, set
}
// MultiSet will call Set on the given Store for every key-value pair in the
// given map.
func MultiSet(ctx context.Context, s Store, m map[ID]any) error {
var errs []error
for id, payload := range m {
if err := s.Set(ctx, id, payload); err != nil {
errs = append(errs, fmt.Errorf("setting payload for %q: %w", id, err))
}
}
return errors.Join(errs...)
}
// MultiGet will call Get on the given Store for every key-value pair in the
// given map. Each value in the map must be a pointer receiver.
func MultiGet(ctx context.Context, s Store, m map[ID]any) error {
var errs []error
for id, into := range m {
if err := s.Get(ctx, into, id); err != nil {
errs = append(errs, fmt.Errorf("getting payload for %q: %w", id, err))
}
}
return errors.Join(errs...)
}

83
go/secrets/store_fs.go Normal file
View File

@ -0,0 +1,83 @@
package secrets
import (
"context"
"encoding/json"
"errors"
"fmt"
"io/fs"
"os"
"path/filepath"
)
type fsStore struct {
dirPath string
}
type fsStorePayload[Body any] struct {
Version int
Body Body
}
// NewFSStore returns a Store which will store secrets to the given directory.
func NewFSStore(dirPath string) (Store, error) {
err := os.Mkdir(dirPath, 0700)
if err != nil && !errors.Is(err, fs.ErrExist) {
return nil, fmt.Errorf("making directory: %w", err)
}
return &fsStore{dirPath}, nil
}
func (s *fsStore) path(id ID) string {
return filepath.Join(s.dirPath, string(id))
}
func (s *fsStore) Set(_ context.Context, id ID, payload any) error {
path := s.path(id)
f, err := os.Create(path)
if err != nil {
return fmt.Errorf("creating file %q: %w", path, err)
}
defer f.Close()
if err := json.NewEncoder(f).Encode(fsStorePayload[any]{
Version: 1,
Body: payload,
}); err != nil {
return fmt.Errorf("writing JSON encoded payload to %q: %w", path, err)
}
return nil
}
func (s *fsStore) Get(_ context.Context, into any, id ID) error {
path := s.path(id)
f, err := os.Open(path)
if errors.Is(err, fs.ErrNotExist) {
return ErrNotFound
} else if err != nil {
return fmt.Errorf("creating file %q: %w", path, err)
}
defer f.Close()
var fullPayload fsStorePayload[json.RawMessage]
if err := json.NewDecoder(f).Decode(&fullPayload); err != nil {
return fmt.Errorf("decoding JSON payload from %q: %w", path, err)
}
if fullPayload.Version != 1 {
return fmt.Errorf(
"unexpected JSON payload version %d", fullPayload.Version,
)
}
if err := json.Unmarshal(fullPayload.Body, into); err != nil {
return fmt.Errorf(
"decoding JSON payload body from %q into %T: %w", path, into, err,
)
}
return nil
}

42
go/secrets/store_fs_test.go Normal file
View File

@ -0,0 +1,42 @@
package secrets
import (
"context"
"errors"
"testing"
)
func Test_fsStore(t *testing.T) {
type payload struct {
Foo int
}
var (
ctx = context.Background()
dir = t.TempDir()
id = NewID("testing", "a")
)
store, err := NewFSStore(dir)
if err != nil {
t.Fatal(err)
}
var got payload
if err := store.Get(ctx, &got, id); !errors.Is(err, ErrNotFound) {
t.Fatalf("expected %v, got: %v", ErrNotFound, err)
}
want := payload{Foo: 5}
if err := store.Set(ctx, id, want); err != nil {
t.Fatal(err)
}
if err := store.Get(ctx, &got, id); err != nil {
t.Fatal(err)
}
if want != got {
t.Fatalf("wanted %+v, got: %+v", want, got)
}
}