mirror of
https://github.com/jech/galene.git
synced 2024-12-22 15:25:48 +01:00
Move token handling into the separate module.
Tokens are now an interface, and all the token logic is encapsulated in the token module.
This commit is contained in:
Juliusz Chroboczek
parent
59ff25310d
commit
c58064d923
4 changed files with 316 additions and 283 deletions
119
group/group.go
119
group/group.go
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@ -1110,82 +1110,67 @@ func readDescription(name string) (*Description, error) {
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return &desc, nil
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}
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// called locked
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func (g *Group) getPasswordPermission(creds ClientCredentials) ([]string, error) {
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desc := g.description
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if !desc.AllowAnonymous && creds.Username == "" {
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return nil, ErrAnonymousNotAuthorised
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}
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if found, good := matchClient(creds, desc.Op); found {
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if good {
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if desc.AllowRecording {
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return []string{"op", "present", "record"}, nil
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}
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return []string{"op", "present"}, nil
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}
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return nil, ErrNotAuthorised
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}
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if found, good := matchClient(creds, desc.Presenter); found {
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if good {
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return []string{"present"}, nil
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}
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return nil, ErrNotAuthorised
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}
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if found, good := matchClient(creds, desc.Other); found {
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if good {
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return nil, nil
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}
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return nil, ErrNotAuthorised
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}
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return nil, ErrNotAuthorised
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}
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// called locked
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func (g *Group) getPermission(creds ClientCredentials) (string, []string, error) {
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desc := g.description
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if creds.Token == "" {
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if !desc.AllowAnonymous && creds.Username == "" {
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return "", nil, ErrAnonymousNotAuthorised
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var username string
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var perms []string
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if creds.Token != "" {
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tok, err := token.Parse(creds.Token, desc.AuthKeys)
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if err != nil {
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return "", nil, err
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}
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if found, good := matchClient(creds, desc.Op); found {
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if good {
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var p []string
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p = []string{"op", "present"}
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if desc.AllowRecording {
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p = append(p, "record")
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}
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return creds.Username, p, nil
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}
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return "", nil, ErrNotAuthorised
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conf, err := GetConfiguration()
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if err != nil {
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return "", nil, err
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}
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if found, good := matchClient(creds, desc.Presenter); found {
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if good {
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return creds.Username, []string{"present"}, nil
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}
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return "", nil, ErrNotAuthorised
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username, perms, err =
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tok.Check(conf.CanonicalHost, g.name, &creds.Username)
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if err != nil {
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return "", nil, err
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}
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if found, good := matchClient(creds, desc.Other); found {
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if good {
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return creds.Username, nil, nil
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}
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return "", nil, ErrNotAuthorised
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} else {
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var err error
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username = creds.Username
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perms, err = g.getPasswordPermission(creds)
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if err != nil {
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return "", nil, err
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}
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return "", nil, ErrNotAuthorised
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}
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sub, aud, perms, err := token.Valid(creds.Token, desc.AuthKeys)
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if err != nil {
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log.Printf("Token authentication: %v", err)
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return "", nil, ErrNotAuthorised
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}
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if sub == nil {
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log.Printf("Token authentication: token has no sub")
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return "", nil, ErrNotAuthorised
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}
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username := *sub
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if !desc.AllowAnonymous && username == "" {
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return "", nil, ErrAnonymousNotAuthorised
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}
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conf, err := GetConfiguration()
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if err != nil {
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log.Printf("Read config.json: %v", err)
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return "", nil, err
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}
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ok := false
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for _, u := range aud {
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url, err := url.Parse(u)
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if err != nil {
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log.Printf("Token URL: %v", err)
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continue
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}
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// if canonicalHost is not set, we allow tokens
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// for any domain name. Hopefully different
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// servers use distinct keys.
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if conf.CanonicalHost != "" {
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if !strings.EqualFold(
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url.Host, conf.CanonicalHost,
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) {
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continue
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}
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}
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if url.Path == path.Join("/group", g.name)+"/" {
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ok = true
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break
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}
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}
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if !ok {
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return "", nil, ErrNotAuthorised
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}
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return username, perms, nil
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}
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197
token/jwt.go
Normal file
197
token/jwt.go
Normal file
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@ -0,0 +1,197 @@
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package token
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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"encoding/base64"
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"errors"
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"math/big"
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"net/url"
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"path"
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"strings"
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"github.com/golang-jwt/jwt/v4"
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)
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type JWT jwt.Token
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func parseBase64(k string, d map[string]interface{}) ([]byte, error) {
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v, ok := d[k].(string)
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if !ok {
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return nil, errors.New("key " + k + " not found")
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}
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vv, err := base64.RawURLEncoding.DecodeString(v)
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if err != nil {
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return nil, err
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}
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return vv, nil
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}
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func ParseKey(key map[string]interface{}) (interface{}, error) {
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kty, ok := key["kty"].(string)
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if !ok {
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return nil, errors.New("kty not found")
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}
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alg, ok := key["alg"].(string)
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if !ok {
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return nil, errors.New("alg not found")
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}
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switch kty {
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case "oct":
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var length int
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switch alg {
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case "HS256":
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length = 32
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case "HS384":
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length = 48
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case "HS512":
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length = 64
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default:
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return nil, errors.New("unknown alg")
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}
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k, err := parseBase64("k", key)
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if err != nil {
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return nil, err
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}
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if len(k) != length {
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return nil, errors.New("bad length for key")
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}
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return k, nil
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case "EC":
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if alg != "ES256" {
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return nil, errors.New("uknown alg")
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}
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crv, ok := key["crv"].(string)
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if !ok {
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return nil, errors.New("crv not found")
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}
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if crv != "P-256" {
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return nil, errors.New("unknown crv")
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}
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curve := elliptic.P256()
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xbytes, err := parseBase64("x", key)
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if err != nil {
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return nil, err
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}
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var x big.Int
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x.SetBytes(xbytes)
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ybytes, err := parseBase64("y", key)
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if err != nil {
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return nil, err
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}
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var y big.Int
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y.SetBytes(ybytes)
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if !curve.IsOnCurve(&x, &y) {
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return nil, errors.New("key is not on curve")
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}
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return &ecdsa.PublicKey{
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Curve: curve,
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X: &x,
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Y: &y,
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}, nil
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default:
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return nil, errors.New("unknown key type")
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}
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}
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func getKey(header map[string]interface{}, keys []map[string]interface{}) (interface{}, error) {
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alg, _ := header["alg"].(string)
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kid, _ := header["kid"].(string)
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for _, k := range keys {
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kid2, _ := k["kid"].(string)
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alg2, _ := k["alg"].(string)
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if (kid == "" || kid == kid2) && alg == alg2 {
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return ParseKey(k)
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}
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}
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return nil, errors.New("key not found")
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}
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func toStringArray(a []interface{}) ([]string, bool) {
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b := make([]string, len(a))
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for i, v := range a {
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w, ok := v.(string)
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if !ok {
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return nil, false
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}
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b[i] = w
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}
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return b, true
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}
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func parseJWT(token string, keys []map[string]interface{}) (Token, error) {
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t, err := jwt.Parse(token, func(t *jwt.Token) (interface{}, error) {
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return getKey(t.Header, keys)
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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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return (*JWT)(t), nil
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}
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func (token *JWT) Check(host, group string, username *string) (string, []string, error) {
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claims := token.Claims.(jwt.MapClaims)
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s, ok := claims["sub"]
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if !ok {
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return "", nil, errors.New("token has no 'sub' field")
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}
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sub, ok := s.(string)
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if !ok {
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return "", nil, errors.New("invalid 'sub' field")
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}
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// we accept tokens with a different username from the one provided,
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// and use the token's 'sub' field to override the username
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var aud []string
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if a, ok := claims["aud"]; ok && a != nil {
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switch a := a.(type) {
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case string:
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aud = []string{a}
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case []interface{}:
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aud, ok = toStringArray(a)
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if !ok {
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return "", nil, errors.New("invalid 'aud' field")
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}
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default:
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return "", nil, errors.New("invalid 'aud' field")
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}
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}
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ok = false
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for _, u := range aud {
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url, err := url.Parse(u)
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if err != nil {
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continue
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}
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// if canonicalHost is not set, we allow tokens
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// for any domain name. Hopefully different
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// servers use distinct keys.
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if host != "" {
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if !strings.EqualFold(url.Host, host) {
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continue
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}
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}
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if url.Path == path.Join("/group", group)+"/" {
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ok = true
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break
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}
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}
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if !ok {
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return "", nil, errors.New("token for wrong group")
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}
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var perms []string
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if p, ok := claims["permissions"]; ok && p != nil {
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pp, ok := p.([]interface{})
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if !ok {
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return "", nil, errors.New("invalid 'permissions' field")
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}
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perms, ok = toStringArray(pp)
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if !ok {
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return "", nil, errors.New("invalid 'permissions' field")
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}
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}
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return sub, perms, nil
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}
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@ -3,14 +3,11 @@ package token
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import (
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"crypto/ecdsa"
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"encoding/json"
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"errors"
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"reflect"
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"testing"
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"github.com/golang-jwt/jwt/v4"
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)
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func TestHS256(t *testing.T) {
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func TestJWKHS256(t *testing.T) {
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key := `{
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"kty":"oct",
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"alg":"HS256",
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@ -31,7 +28,7 @@ func TestHS256(t *testing.T) {
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}
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}
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func TestES256(t *testing.T) {
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func TestJWKES256(t *testing.T) {
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key := `{
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"kty":"EC",
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"alg":"ES256",
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@ -57,7 +54,7 @@ func TestES256(t *testing.T) {
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}
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}
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func TestValid(t *testing.T) {
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func TestJWT(t *testing.T) {
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key := `{"alg":"HS256","k":"H7pCkktUl5KyPCZ7CKw09y1j460tfIv4dRcS1XstUKY","key_ops":["sign","verify"],"kty":"oct"}`
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var k map[string]interface{}
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err := json.Unmarshal([]byte(key), &k)
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@ -66,76 +63,89 @@ func TestValid(t *testing.T) {
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}
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keys := []map[string]interface{}{k}
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john := "john"
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jack := "jack"
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goodToken := "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJqb2huIiwiYXVkIjoiaHR0cHM6Ly9nYWxlbmUub3JnOjg0NDMvZ3JvdXAvYXV0aC8iLCJwZXJtaXNzaW9ucyI6WyJwcmVzZW50Il0sImlhdCI6MTY0NTMxMDI5NCwiZXhwIjoyOTA2NzUwMjk0LCJpc3MiOiJodHRwOi8vbG9jYWxob3N0OjEyMzQvIn0.6xXpgBkBMn4PSBpnwYHb-gRn_Q97Yq9DoKkAf2_6iwc"
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sub, aud, perms, err := Valid(goodToken, keys)
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tok, err := Parse(goodToken, keys)
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if err != nil {
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t.Errorf("Token invalid: %v", err)
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} else {
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if sub == nil || *sub != "john" {
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t.Errorf("Unexpected sub: %v", sub)
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}
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if !reflect.DeepEqual(aud, []string{"https://galene.org:8443/group/auth/"}) {
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t.Errorf("Unexpected aud: %v", aud)
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}
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if !reflect.DeepEqual(perms, []string{"present"}) {
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t.Errorf("Unexpected perms: %v", perms)
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}
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t.Errorf("Couldn't parse goodToken: %v", err)
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}
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anonymousToken := "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIiLCJhdWQiOiJodHRwczovL2dhbGVuZS5vcmc6ODQ0My9ncm91cC9hdXRoLyIsInBlcm1pc3Npb25zIjpbInByZXNlbnQiXSwiaWF0IjoxNjQ1MzEwMjk0LCJleHAiOjI5MDY3NTAyOTQsImlzcyI6Imh0dHA6Ly9sb2NhbGhvc3Q6MTIzNC8ifQo.xwpHIRzKAIgiHKG1pVQyZlXcolmvRwNvBm6FN2gTwZw"
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sub, aud, perms, err = Valid(anonymousToken, keys)
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username, perms, err := tok.Check("galene.org:8443", "auth", &john)
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if err != nil {
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t.Errorf("Token invalid: %v", err)
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} else {
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if sub == nil || *sub != "" {
|
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t.Errorf("Unexpected sub: %v", sub)
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}
|
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if !reflect.DeepEqual(aud, []string{"https://galene.org:8443/group/auth/"}) {
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t.Errorf("Unexpected aud: %v", aud)
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}
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if !reflect.DeepEqual(perms, []string{"present"}) {
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t.Errorf("Unexpected perms: %v", perms)
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}
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t.Errorf("goodToken is not valid: %v", err)
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}
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if username != "john" || !reflect.DeepEqual(perms, []string{"present"}) {
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t.Errorf("Expected john, [present], got %v %v", username, perms)
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}
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|
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username, perms, err = tok.Check("galene.org:8443", "auth", &jack)
|
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if err != nil {
|
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t.Errorf("goodToken is not valid: %v", err)
|
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}
|
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if username != "john" || !reflect.DeepEqual(perms, []string{"present"}) {
|
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t.Errorf("Expected john, [present], got %v %v", username, perms)
|
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}
|
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|
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username, perms, err = tok.Check("", "auth", &john)
|
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if err != nil {
|
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t.Errorf("goodToken is not valid: %v", err)
|
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}
|
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|
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_, _, err = tok.Check("galene.org", "auth", &john)
|
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if err == nil {
|
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t.Errorf("goodToken is valid for wrong hostname")
|
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}
|
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|
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_, _, err = tok.Check("galene.org:8443", "not-auth", &john)
|
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if err == nil {
|
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t.Errorf("goodToken is valid for wrong group")
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}
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|
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emptySubToken := "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIiLCJhdWQiOiJodHRwczovL2dhbGVuZS5vcmc6ODQ0My9ncm91cC9hdXRoLyIsInBlcm1pc3Npb25zIjpbInByZXNlbnQiXSwiaWF0IjoxNjQ1MzEwMjk0LCJleHAiOjI5MDY3NTAyOTQsImlzcyI6Imh0dHA6Ly9sb2NhbGhvc3Q6MTIzNC8ifQo.xwpHIRzKAIgiHKG1pVQyZlXcolmvRwNvBm6FN2gTwZw"
|
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|
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tok, err = Parse(emptySubToken, keys)
|
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if err != nil {
|
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t.Errorf("Couldn't parse emptySubToken: %v", err)
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}
|
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username, perms, err = tok.Check("galene.org:8443", "auth", &jack)
|
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if err != nil {
|
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t.Errorf("anonymousToken is not valid: %v", err)
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}
|
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if username != "" || !reflect.DeepEqual(perms, []string{"present"}) {
|
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t.Errorf("Expected \"\", [present], got %v %v", username, perms)
|
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}
|
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|
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noSubToken := "eyJhbGciOiJIUzI1NiJ9.eyJhdWQiOiJodHRwczovL2dhbGVuZS5vcmc6ODQ0My9ncm91cC9hdXRoLyIsInBlcm1pc3Npb25zIjpbInByZXNlbnQiXSwiaWF0IjoxNjQ1MzEwMjk0LCJleHAiOjI5MDY3NTAyOTQsImlzcyI6Imh0dHA6Ly9sb2NhbGhvc3Q6MTIzNC8ifQo.7LvoZEKPNVvsRe8SjLxmKa1TgjTA4ZQo2LMPJSXl-ro"
|
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|
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sub, aud, perms, err = Valid(noSubToken, keys)
|
||||
tok, err = Parse(noSubToken, keys)
|
||||
if err != nil {
|
||||
t.Errorf("Token invalid: %v", err)
|
||||
} else {
|
||||
if sub != nil {
|
||||
t.Errorf("Unexpected sub: %v", sub)
|
||||
}
|
||||
if !reflect.DeepEqual(aud, []string{"https://galene.org:8443/group/auth/"}) {
|
||||
t.Errorf("Unexpected aud: %v", aud)
|
||||
}
|
||||
if !reflect.DeepEqual(perms, []string{"present"}) {
|
||||
t.Errorf("Unexpected perms: %v", perms)
|
||||
}
|
||||
t.Errorf("Couldn't parse noSubToken: %v", err)
|
||||
}
|
||||
username, perms, err = tok.Check("galene.org:8443", "auth", &jack)
|
||||
if err == nil {
|
||||
t.Errorf("noSubToken is valid")
|
||||
}
|
||||
|
||||
badToken := "eyJ0eXAiOiJKV1QiLCJhbGciOiJub25lIn0.eyJzdWIiOiJqb2huIiwiYXVkIjoiaHR0cHM6Ly9nYWxlbmUub3JnOjg0NDMvZ3JvdXAvYXV0aC8iLCJwZXJtaXNzaW9ucyI6WyJwcmVzZW50Il0sImlhdCI6MTY0NTMxMDQ2OSwiZXhwIjoyOTA2NzUwNDY5LCJpc3MiOiJodHRwOi8vbG9jYWxob3N0OjEyMzQvIn0."
|
||||
|
||||
_, _, _, err = Valid(badToken, keys)
|
||||
var verr *jwt.ValidationError
|
||||
if !errors.As(err, &verr) {
|
||||
t.Errorf("Token should fail")
|
||||
_, err = Parse(badToken, keys)
|
||||
if err == nil {
|
||||
t.Errorf("badToken is good")
|
||||
}
|
||||
|
||||
expiredToken := "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJqb2huIiwiYXVkIjoiaHR0cHM6Ly9nYWxlbmUub3JnOjg0NDMvZ3JvdXAvYXV0aC8iLCJwZXJtaXNzaW9ucyI6WyJwcmVzZW50Il0sImlhdCI6MTY0NTMxMDMyMiwiZXhwIjoxNjQ1MzEwMzUyLCJpc3MiOiJodHRwOi8vbG9jYWxob3N0OjEyMzQvIn0.jyqRhoV6iK54SvlP33Fy630aDo-sLNmKKi1kcfqs378"
|
||||
|
||||
_, _, _, err = Valid(expiredToken, keys)
|
||||
if !errors.As(err, &verr) {
|
||||
t.Errorf("Token should be expired")
|
||||
_, err = Parse(expiredToken, keys)
|
||||
if err == nil {
|
||||
t.Errorf("expiredToken is good")
|
||||
}
|
||||
|
||||
noneToken := "eyJ0eXAiOiJKV1QiLCJhbGciOiJub25lIn0.eyJzdWIiOiJqb2huIiwiYXVkIjoiaHR0cHM6Ly9nYWxlbmUub3JnOjg0NDMvZ3JvdXAvYXV0aC8iLCJwZXJtaXNzaW9ucyI6WyJwcmVzZW50Il0sImlhdCI6MTY0NTMxMDQwMSwiZXhwIjoxNjQ1MzEwNDMxLCJpc3MiOiJodHRwOi8vbG9jYWxob3N0OjEyMzQvIn0."
|
||||
_, _, _, err = Valid(noneToken, keys)
|
||||
_, err = Parse(noneToken, keys)
|
||||
if err == nil {
|
||||
t.Errorf("Unsigned token should fail")
|
||||
t.Errorf("noneToken is good")
|
||||
}
|
||||
}
|
||||
167
token/token.go
167
token/token.go
|
|
@ -1,168 +1,9 @@
|
|||
package token
|
||||
|
||||
import (
|
||||
"crypto/ecdsa"
|
||||
"crypto/elliptic"
|
||||
"encoding/base64"
|
||||
"errors"
|
||||
"math/big"
|
||||
|
||||
"github.com/golang-jwt/jwt/v4"
|
||||
)
|
||||
|
||||
func parseBase64(k string, d map[string]interface{}) ([]byte, error) {
|
||||
v, ok := d[k].(string)
|
||||
if !ok {
|
||||
return nil, errors.New("key " + k + " not found")
|
||||
}
|
||||
vv, err := base64.RawURLEncoding.DecodeString(v)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return vv, nil
|
||||
type Token interface {
|
||||
Check(host, group string, username *string) (string, []string, error)
|
||||
}
|
||||
|
||||
func ParseKey(key map[string]interface{}) (interface{}, error) {
|
||||
kty, ok := key["kty"].(string)
|
||||
if !ok {
|
||||
return nil, errors.New("kty not found")
|
||||
}
|
||||
alg, ok := key["alg"].(string)
|
||||
if !ok {
|
||||
return nil, errors.New("alg not found")
|
||||
}
|
||||
|
||||
switch kty {
|
||||
case "oct":
|
||||
var length int
|
||||
switch alg {
|
||||
case "HS256":
|
||||
length = 32
|
||||
case "HS384":
|
||||
length = 48
|
||||
case "HS512":
|
||||
length = 64
|
||||
default:
|
||||
return nil, errors.New("unknown alg")
|
||||
}
|
||||
k, err := parseBase64("k", key)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(k) != length {
|
||||
return nil, errors.New("bad length for key")
|
||||
}
|
||||
return k, nil
|
||||
case "EC":
|
||||
if alg != "ES256" {
|
||||
return nil, errors.New("uknown alg")
|
||||
}
|
||||
crv, ok := key["crv"].(string)
|
||||
if !ok {
|
||||
return nil, errors.New("crv not found")
|
||||
}
|
||||
if crv != "P-256" {
|
||||
return nil, errors.New("unknown crv")
|
||||
}
|
||||
curve := elliptic.P256()
|
||||
xbytes, err := parseBase64("x", key)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
var x big.Int
|
||||
x.SetBytes(xbytes)
|
||||
ybytes, err := parseBase64("y", key)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
var y big.Int
|
||||
y.SetBytes(ybytes)
|
||||
if !curve.IsOnCurve(&x, &y) {
|
||||
return nil, errors.New("key is not on curve")
|
||||
}
|
||||
return &ecdsa.PublicKey{
|
||||
Curve: curve,
|
||||
X: &x,
|
||||
Y: &y,
|
||||
}, nil
|
||||
default:
|
||||
return nil, errors.New("unknown key type")
|
||||
}
|
||||
}
|
||||
|
||||
func getKey(header map[string]interface{}, keys []map[string]interface{}) (interface{}, error) {
|
||||
alg, _ := header["alg"].(string)
|
||||
kid, _ := header["kid"].(string)
|
||||
for _, k := range keys {
|
||||
kid2, _ := k["kid"].(string)
|
||||
alg2, _ := k["alg"].(string)
|
||||
if (kid == "" || kid == kid2) && alg == alg2 {
|
||||
return ParseKey(k)
|
||||
}
|
||||
}
|
||||
return nil, errors.New("key not found")
|
||||
}
|
||||
|
||||
func toStringArray(a []interface{}) ([]string, bool) {
|
||||
b := make([]string, len(a))
|
||||
for i, v := range a {
|
||||
w, ok := v.(string)
|
||||
if !ok {
|
||||
return nil, false
|
||||
}
|
||||
b[i] = w
|
||||
}
|
||||
return b, true
|
||||
}
|
||||
|
||||
func Valid(token string, keys []map[string]interface{}) (*string, []string, []string, error) {
|
||||
tok, err := jwt.Parse(token, func(t *jwt.Token) (interface{}, error) {
|
||||
return getKey(t.Header, keys)
|
||||
})
|
||||
if err != nil {
|
||||
return nil, nil, nil, err
|
||||
}
|
||||
claims := tok.Claims.(jwt.MapClaims)
|
||||
|
||||
var sub *string
|
||||
if s, ok := claims["sub"]; ok && s != nil {
|
||||
ss, ok := s.(string)
|
||||
if !ok {
|
||||
return nil, nil, nil,
|
||||
errors.New("invalid 'sub' field")
|
||||
}
|
||||
sub = &ss
|
||||
}
|
||||
|
||||
var aud []string
|
||||
if a, ok := claims["aud"]; ok && a != nil {
|
||||
switch a := a.(type) {
|
||||
case string:
|
||||
aud = []string{a}
|
||||
case []interface{}:
|
||||
aud, ok = toStringArray(a)
|
||||
if !ok {
|
||||
return nil, nil, nil,
|
||||
errors.New("invalid 'aud' field")
|
||||
}
|
||||
default:
|
||||
return nil, nil, nil,
|
||||
errors.New("invalid 'aud' field")
|
||||
}
|
||||
}
|
||||
|
||||
var perms []string
|
||||
if p, ok := claims["permissions"]; ok && p != nil {
|
||||
pp, ok := p.([]interface{})
|
||||
if !ok {
|
||||
return nil, nil, nil,
|
||||
errors.New("invalid 'permissions' field")
|
||||
}
|
||||
perms, ok = toStringArray(pp)
|
||||
if !ok {
|
||||
return nil, nil, nil,
|
||||
errors.New("invalid 'permissions' field")
|
||||
}
|
||||
}
|
||||
return sub, aud, perms, nil
|
||||
func Parse(token string, keys []map[string]interface{}) (Token, error) {
|
||||
return parseJWT(token, keys)
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue