Drastically simplify the method and logic; keep an in-memory cache and use that for most operations, only affecting the backend storage when needed.
This commit is contained in:
Jeff Mitchell
parent
c66f0918be
commit
b6b62f7dc1
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@ -6,7 +6,11 @@ import (
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)
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func Factory(conf *logical.BackendConfig) (logical.Backend, error) {
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return Backend().Setup(conf)
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b, err := Backend().Setup(conf)
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if err != nil {
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return b, err
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}
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return b, populateCRLs(conf.StorageView)
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}
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func Backend() *framework.Backend {
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@ -17,7 +21,7 @@ func Backend() *framework.Backend {
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PathsSpecial: &logical.Paths{
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Root: []string{
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"certs/*",
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"crlsets/*",
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"crls/*",
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},
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Unauthenticated: []string{
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@ -0,0 +1,261 @@
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package cert
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import (
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"crypto/x509"
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"fmt"
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"math/big"
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"strings"
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"sync"
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"github.com/fatih/structs"
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"github.com/hashicorp/vault/helper/certutil"
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"github.com/hashicorp/vault/logical"
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"github.com/hashicorp/vault/logical/framework"
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)
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func pathCRLs(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: "crls/" + framework.GenericNameRegex("name"),
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Fields: map[string]*framework.FieldSchema{
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"name": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: "The name of the certificate",
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},
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"crl": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: `The public certificate that should be trusted.
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May be DER or PEM encoded. Note: the expiration time
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is ignored; if the CRL is no longer valid, delete it
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using the same name as specified here.`,
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},
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"serial": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: `If specified, for a read, information for this
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serial will be returned rather than the named CRL.
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This can be a hex-formatted string separated
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by : or -, or an integer string; this will be
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assumed to be base 10 unless prefixed by "0x"
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for base 16 or "0" for base 8.`,
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},
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},
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.DeleteOperation: b.pathCRLDelete,
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logical.ReadOperation: b.pathCRLRead,
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logical.WriteOperation: b.pathCRLWrite,
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},
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HelpSynopsis: pathCRLsHelpSyn,
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HelpDescription: pathCRLsHelpDesc,
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}
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}
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var (
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crls = map[string]CRLInfo{}
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crlUpdateMutex = &sync.RWMutex{}
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)
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func populateCRLs(storage logical.Storage) error {
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crlUpdateMutex.Lock()
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defer crlUpdateMutex.Unlock()
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keys, err := storage.List("crls/")
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if err != nil {
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return fmt.Errorf("error listing CRLs: %v", err)
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}
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if keys == nil || len(keys) == 0 {
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return nil
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}
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for _, key := range keys {
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entry, err := storage.Get("crls/" + key)
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if err != nil {
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return fmt.Errorf("error loading CRL %s: %v", key, err)
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}
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if entry == nil {
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continue
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}
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var crlInfo CRLInfo
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err = entry.DecodeJSON(&crlInfo)
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if err != nil {
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return fmt.Errorf("error decoding CRL %s: %v", key, err)
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}
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crls[key] = crlInfo
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}
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return nil
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}
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func findSerialInCRLs(serial *big.Int) map[string]RevokedSerialInfo {
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crlUpdateMutex.RLock()
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defer crlUpdateMutex.RUnlock()
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ret := map[string]RevokedSerialInfo{}
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for key, crl := range crls {
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if crl.Serials == nil {
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continue
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}
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if info, ok := crl.Serials[serial.String()]; ok {
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ret[key] = info
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}
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}
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return ret
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}
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func parseSerialString(input string) (*big.Int, error) {
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ret := &big.Int{}
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switch {
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case strings.Count(input, ":") > 0:
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serialBytes := certutil.ParseHexFormatted(input, ":")
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if serialBytes == nil {
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return nil, fmt.Errorf("error parsing serial %s", input)
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}
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ret.SetBytes(serialBytes)
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case strings.Count(input, "-") > 0:
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serialBytes := certutil.ParseHexFormatted(input, "-")
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if serialBytes == nil {
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return nil, fmt.Errorf("error parsing serial %s", input)
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}
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ret.SetBytes(serialBytes)
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default:
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var success bool
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ret, success = ret.SetString(input, 0)
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if !success {
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return nil, fmt.Errorf("error parsing serial %s", input)
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}
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}
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return ret, nil
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}
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func (b *backend) pathCRLDelete(
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req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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name := strings.ToLower(d.Get("name").(string))
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if name == "" {
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return logical.ErrorResponse(`"name" parameter cannot be empty`), nil
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}
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crlUpdateMutex.Lock()
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defer crlUpdateMutex.Unlock()
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_, ok := crls[name]
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if !ok {
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return logical.ErrorResponse(fmt.Sprintf(
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"no such CRL %s", name,
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)), nil
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}
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err := req.Storage.Delete("crls/" + name)
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if err != nil {
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return logical.ErrorResponse(fmt.Sprintf(
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"error deleting crl %s: %v", name, err),
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), nil
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}
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delete(crls, name)
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return nil, nil
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}
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func (b *backend) pathCRLRead(
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req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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name := strings.ToLower(d.Get("name").(string))
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serialStr := d.Get("serial").(string)
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if name == "" && serialStr == "" {
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return logical.ErrorResponse(`"name" or "serial" parameter must be set`), nil
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}
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crlUpdateMutex.RLock()
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defer crlUpdateMutex.RUnlock()
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var retData map[string]interface{}
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if serialStr != "" {
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serial, err := parseSerialString(serialStr)
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if err != nil {
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return logical.ErrorResponse(err.Error()), nil
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}
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ret := findSerialInCRLs(serial)
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retData = structs.New(&ret).Map()
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} else {
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crl, ok := crls[name]
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if !ok {
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return logical.ErrorResponse(fmt.Sprintf(
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"no such CRL %s", name,
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)), nil
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}
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retData = structs.New(&crl).Map()
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}
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return &logical.Response{
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Data: retData,
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}, nil
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}
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func (b *backend) pathCRLWrite(
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req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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name := strings.ToLower(d.Get("name").(string))
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if name == "" {
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return logical.ErrorResponse(`"name" parameter cannot be empty`), nil
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}
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crl := d.Get("crl").(string)
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certList, err := x509.ParseCRL([]byte(crl))
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if err != nil {
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return logical.ErrorResponse(fmt.Sprintf("failed to parse CRL: %v", err)), nil
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}
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if certList == nil {
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return logical.ErrorResponse("parsed CRL is nil"), nil
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}
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crlUpdateMutex.Lock()
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defer crlUpdateMutex.Unlock()
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crlInfo := CRLInfo{
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Serials: map[string]RevokedSerialInfo{},
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}
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for _, revokedCert := range certList.TBSCertList.RevokedCertificates {
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crlInfo.Serials[revokedCert.SerialNumber.String()] = RevokedSerialInfo{}
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}
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entry, err := logical.StorageEntryJSON("crls/"+name, crlInfo)
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if err != nil {
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return nil, err
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}
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if err = req.Storage.Put(entry); err != nil {
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return nil, err
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}
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crls[name] = crlInfo
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return nil, nil
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}
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type CRLInfo struct {
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Serials map[string]RevokedSerialInfo `json:"serials" structs:"serials" mapstructure:"serials"`
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}
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type RevokedSerialInfo struct {
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}
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const pathCRLsHelpSyn = `
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Manage Certificate Revocation Lists checked during authentication.
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`
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const pathCRLsHelpDesc = `
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This endpoint allows you to create, read, update, and delete the Certificate
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Revocation Lists checked during authentication.
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When any CRLs are in effect, any login will check the trust chains sent by a
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client against the submitted CRLs. Any chain containing a serial number revoked
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by one or more of the CRLs causes that chain to be marked as invalid for the
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authentication attempt. Conversely, *any* valid chain -- that is, a chain
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in which none of the serials are revoked by any CRL -- allows authentication.
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This allows authentication to succeed when interim parts of one chain have been
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revoked; for instance, if a certificate is signed by two intermediate CAs due to
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one of them expiring.
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`
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@ -1,306 +0,0 @@
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package cert
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import (
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"crypto/x509"
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"fmt"
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"math/big"
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"strings"
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"github.com/hashicorp/vault/helper/certutil"
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"github.com/hashicorp/vault/logical"
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"github.com/hashicorp/vault/logical/framework"
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)
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func pathCRLs(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: "crls/" + framework.GenericNameRegex("name"),
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Fields: map[string]*framework.FieldSchema{
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"name": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: "The name of the certificate",
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},
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"crl": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: `The public certificate that should be trusted.
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May be DER or PEM encoded. Note: the expiration time
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is ignored; if the CRL is no longer valid, delete it
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using the same name as specified here.`,
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},
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"serial": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: `If specified, for a read, information for this
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serial will be returned rather than the named CRL.
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CRL. For a delete, only this serial will be removed
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from the named CRL entry. This can be a hex-formatted
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string separated by : or -, or an integer string;
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this will be assumed to be base 10 unless prefixed
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by "0x" for base 16 or "0" for base 8.`,
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},
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},
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.DeleteOperation: b.pathCRLDelete,
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logical.ReadOperation: b.pathCRLRead,
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logical.WriteOperation: b.pathCRLWrite,
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},
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HelpSynopsis: pathCRLsHelpSyn,
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HelpDescription: pathCRLsHelpDesc,
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}
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}
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func parseSerialString(input string) (*big.Int, error) {
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ret := &big.Int{}
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switch {
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case strings.Count(input, ":") > 0:
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serialBytes := certutil.ParseHexFormatted(input, ":")
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if serialBytes == nil {
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return nil, fmt.Errorf("error parsing serial %s", input)
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}
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ret.SetBytes(serialBytes)
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case strings.Count(input, "-") > 0:
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serialBytes := certutil.ParseHexFormatted(input, "-")
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if serialBytes == nil {
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return nil, fmt.Errorf("error parsing serial %s", input)
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}
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ret.SetBytes(serialBytes)
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default:
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var success bool
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ret, success = ret.SetString(input, 0)
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if !success {
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return nil, fmt.Errorf("error parsing serial %s", input)
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}
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}
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return ret, nil
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}
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func (b *backend) pathCRLDelete(
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req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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name := strings.ToLower(d.Get("name").(string))
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if name == "" {
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return logical.ErrorResponse(`"name" parameter cannot be empty`), nil
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}
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serialStr := d.Get("serial").(string)
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if serialStr != "" {
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serial, err := parseSerialString(serialStr)
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if err != nil {
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return logical.ErrorResponse(err.Error()), nil
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}
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err = b.deleteSerial(req.Storage, name, serial)
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if err != nil {
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return logical.ErrorResponse(fmt.Sprintf(
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"error deleting serial %s from CRL %s: %s", serial, name, err),
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), nil
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}
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return nil, nil
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}
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// deleteIndex is best effort to ensure it removes as much as possible if there is
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// a problem, so it does not currently return an error
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b.deleteIndex(req.Storage, name)
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err := req.Storage.Delete("crls/set/" + name)
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if err != nil {
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return logical.ErrorResponse(fmt.Sprintf(
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"error deleting set %s: %s", name, err),
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), nil
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}
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return nil, nil
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}
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func (b *backend) pathCRLRead(
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req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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name := strings.ToLower(d.Get("name").(string))
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if name == "" {
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return logical.ErrorResponse(`"name" parameter cannot be empty`), nil
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}
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return nil, nil
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/*
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return &logical.Response{
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Data: map[string]interface{}{
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"certificate": cert.Certificate,
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"display_name": cert.DisplayName,
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"policies": strings.Join(cert.Policies, ","),
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"ttl": duration / time.Second,
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},
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}, nil
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*/
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}
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func (b *backend) pathCRLWrite(
|
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req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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name := strings.ToLower(d.Get("name").(string))
|
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if name == "" {
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return logical.ErrorResponse(`"name" parameter cannot be empty`), nil
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}
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crl := d.Get("crl").(string)
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certList, err := x509.ParseCRL([]byte(crl))
|
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if err != nil {
|
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return logical.ErrorResponse(fmt.Sprintf("failed to parse CRL: %v", err)), nil
|
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}
|
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if certList == nil {
|
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return logical.ErrorResponse("parsed CRL is nil"), nil
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}
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|
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entry, err := logical.StorageEntryJSON("crls/set/"+name, crl)
|
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if err != nil {
|
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return nil, err
|
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}
|
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if err = req.Storage.Put(entry); err != nil {
|
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return nil, err
|
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}
|
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|
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// Clear out old entries if this is replacing a previously-set CRL.
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// In practice this is what the index is for; it lets us store
|
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// the certs individually for storage efficiency but ensure we can
|
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// clean up properly. So use it to clean up.
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// N.B.: This is best-effort. The worst thing that can happen is
|
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// some wasted storage.
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b.deleteIndex(req.Storage, name)
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crlSetIndex := []*big.Int{}
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for _, revokedCert := range certList.TBSCertList.RevokedCertificates {
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crlSetIndex = append(crlSetIndex, revokedCert.SerialNumber)
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}
|
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|
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entry, err = logical.StorageEntryJSON("crls/index/"+name, crlSetIndex)
|
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if err != nil {
|
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return nil, err
|
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}
|
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if err = req.Storage.Put(entry); err != nil {
|
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return nil, err
|
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}
|
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|
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for _, revokedSerial := range crlSetIndex {
|
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entry, err = logical.StorageEntryJSON("crls/serial/"+revokedSerial.String(),
|
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&RevokedSerialInfo{
|
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name: nil,
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})
|
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if err != nil {
|
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return nil, err
|
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}
|
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if err = req.Storage.Put(entry); err != nil {
|
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return nil, err
|
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}
|
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}
|
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|
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return nil, nil
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}
|
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|
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func (b *backend) deleteIndex(storage logical.Storage, name string) {
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entry, err := storage.Get("crls/index/" + name)
|
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if err != nil {
|
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return
|
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}
|
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if entry == nil {
|
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return
|
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}
|
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|
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crlSetIndex := []*big.Int{}
|
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var revokedSerialInfo RevokedSerialInfo
|
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|
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err = entry.DecodeJSON(&crlSetIndex)
|
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if err != nil {
|
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goto destroyIndex
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}
|
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|
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for _, serial := range crlSetIndex {
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entry, err := storage.Get("crls/serial/" + serial.String())
|
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if err != nil {
|
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goto deleteSerial
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}
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err = entry.DecodeJSON(&revokedSerialInfo)
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// In theory we could now delete the serial when it still exists in a CRL set,
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// but if we can't decode it something is wrong with the entry anyways, and
|
||||
// we're not going to be able to decode it when checking revocation either.
|
||||
if err != nil {
|
||||
goto deleteSerial
|
||||
}
|
||||
|
||||
delete(revokedSerialInfo, name)
|
||||
if len(revokedSerialInfo) > 0 {
|
||||
entry, err = logical.StorageEntryJSON("crls/serial/"+serial.String(), revokedSerialInfo)
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
storage.Put(entry)
|
||||
continue
|
||||
}
|
||||
deleteSerial:
|
||||
storage.Delete("crls/serial/" + serial.String())
|
||||
}
|
||||
|
||||
destroyIndex:
|
||||
storage.Delete("crls/index/" + name)
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func (b *backend) deleteSerial(storage logical.Storage, name string, serial *big.Int) error {
|
||||
var revokedSerialInfo RevokedSerialInfo
|
||||
entry, err := storage.Get("crls/serial/" + serial.String())
|
||||
if err != nil {
|
||||
return fmt.Errorf("error retrieving entry for serial %s: %s", serial, err)
|
||||
}
|
||||
if entry == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
err = entry.DecodeJSON(&revokedSerialInfo)
|
||||
// In theory we could now delete the serial when it still exists in a CRL set,
|
||||
// but if we can't decode it something is wrong with the entry anyways, and
|
||||
// we're not going to be able to decode it when checking revocation either.
|
||||
if err != nil {
|
||||
goto deleteSerial
|
||||
}
|
||||
|
||||
delete(revokedSerialInfo, name)
|
||||
|
||||
if len(revokedSerialInfo) > 0 {
|
||||
entry, err := logical.StorageEntryJSON("crls/serial/"+serial.String(), revokedSerialInfo)
|
||||
if err != nil {
|
||||
return fmt.Errorf("error creating updated storage entry for serial %s: %s", serial, err)
|
||||
}
|
||||
err = storage.Put(entry)
|
||||
if err != nil {
|
||||
return fmt.Errorf("error storing updated entry for serial %s: %s", serial, err)
|
||||
}
|
||||
|
||||
return nil
|
||||
|
||||
}
|
||||
|
||||
deleteSerial:
|
||||
err = storage.Delete("crls/serial/" + serial.String())
|
||||
if err != nil {
|
||||
return fmt.Errorf("error deleting serial entry for serial %s: %s", serial, err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
type RevokedSerialInfo map[string]interface{}
|
||||
|
||||
//FIXME
|
||||
const pathCRLsHelpSyn = `
|
||||
Manage trusted certificates used for authentication.
|
||||
`
|
||||
|
||||
const pathCRLsHelpDesc = `
|
||||
This endpoint allows you to create, read, update, and delete trusted certificates
|
||||
that are allowed to authenticate.
|
||||
|
||||
Deleting a certificate will not revoke auth for prior authenticated connections.
|
||||
To do this, do a revoke on "login". If you don't need to revoke login immediately,
|
||||
then the next renew will cause the lease to expire.
|
||||
`
|
||||
|
|
@ -5,7 +5,6 @@ import (
|
|||
"crypto/x509"
|
||||
"encoding/pem"
|
||||
"errors"
|
||||
"fmt"
|
||||
"strings"
|
||||
|
||||
"github.com/hashicorp/vault/logical"
|
||||
|
|
@ -50,10 +49,7 @@ func (b *backend) pathLogin(
|
|||
return logical.ErrorResponse("invalid certificate or no client certificate supplied"), nil
|
||||
}
|
||||
|
||||
validChain, err := b.checkRevocation(req.Storage, trustedChains)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("error checking revocation: %v", err)
|
||||
}
|
||||
validChain := b.checkForValidChain(req.Storage, trustedChains)
|
||||
if !validChain {
|
||||
return logical.ErrorResponse(
|
||||
"no chain containing non-revoked certificates could be found for this login certificate",
|
||||
|
|
@ -139,37 +135,22 @@ func (b *backend) loadTrustedCerts(store logical.Storage) (pool *x509.CertPool,
|
|||
return
|
||||
}
|
||||
|
||||
func (b *backend) checkRevocation(store logical.Storage, chains [][]*x509.Certificate) (bool, error) {
|
||||
var revokedSerialInfo RevokedSerialInfo
|
||||
func (b *backend) checkForValidChain(store logical.Storage, chains [][]*x509.Certificate) bool {
|
||||
var badChain bool
|
||||
for _, chain := range chains {
|
||||
badChain = false
|
||||
for _, cert := range chain {
|
||||
entry, err := store.Get("crls/serial/" + cert.SerialNumber.String())
|
||||
if err != nil {
|
||||
return false, fmt.Errorf("error looking up revoked serials: %v", err)
|
||||
}
|
||||
if entry != nil {
|
||||
err := entry.DecodeJSON(&revokedSerialInfo)
|
||||
if err != nil {
|
||||
return false, fmt.Errorf("error decoding revoked serial entry: %v", err)
|
||||
}
|
||||
if len(revokedSerialInfo) > 0 {
|
||||
// At least one active CRL is revoking this cert, so try the next chain
|
||||
badChain = true
|
||||
break
|
||||
} else {
|
||||
// We shouldn't have a stored entry with zero sets referring to it,
|
||||
// so it was accidentally orphaned; delete it
|
||||
store.Delete("crls/serial/" + cert.SerialNumber.String())
|
||||
}
|
||||
badCRLs := findSerialInCRLs(cert.SerialNumber)
|
||||
if len(badCRLs) != 0 {
|
||||
badChain = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if !badChain {
|
||||
return true, nil
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false, nil
|
||||
return false
|
||||
}
|
||||
|
||||
// parsePEM parses a PEM encoded x509 certificate
|
||||
|
|
|
|||
Loading…
Reference in New Issue