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dex_token_handler.go
178 lines (165 loc) · 4.79 KB
/
dex_token_handler.go
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package server
import (
"bytes"
"context"
"encoding/base64"
"encoding/json"
"net/http"
"strings"
"go.uber.org/zap"
"github.com/pachyderm/pachyderm/v2/src/internal/determined"
"github.com/pachyderm/pachyderm/v2/src/internal/errors"
"github.com/pachyderm/pachyderm/v2/src/internal/log"
)
type tokenResp struct {
IDToken string `json:"id_token"`
}
type idToken struct {
Email string `json:"email"`
EmailVerified bool `json:"email_verified"`
Groups []string `json:"groups"`
}
func (w *dexWeb) idTokenHandler(next http.Handler) http.HandlerFunc {
return func(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
rrw := &recordResponseWriter{
rw: rw,
b: new(bytes.Buffer),
}
next.ServeHTTP(rrw, r)
if rrw.statusCode >= 400 {
log.Error(ctx, "skip provisioning during login", zap.Int("statusCode", rrw.statusCode))
return
}
ps, err := w.provisioners(ctx)
if err != nil {
log.Error(ctx, "failed to collect user provisioners", zap.Error(err))
return
}
if len(ps) == 0 {
return
}
token, err := idTokenFromBytes(ctx, rrw.b.Bytes())
if err != nil {
log.Error(ctx, "failed to extract ID token from bytes", zap.Error(err))
return
}
if token.Email == "" {
log.Error(ctx, "failed to find email claim in ID token", zap.Error(err))
return
}
for _, p := range ps {
defer p.close()
u := &user{name: token.Email}
if _, err := p.findUser(ctx, token.Email); err != nil {
if !errors.As(err, &errNotFound{}) {
log.Error(ctx, "failed to find user", zap.Error(err),
zap.String("user", token.Email))
return
}
if _, err := p.createUser(ctx, &user{name: token.Email}); err != nil {
log.Error(ctx, "failed to provision user", zap.Error(err),
zap.String("user", token.Email))
return
}
log.Info(ctx, "determined user provisioned", zap.String("email", token.Email))
} else {
log.Info(ctx, "determined user exists", zap.String("email", token.Email))
}
var gs []*group
for _, grp := range token.Groups {
g, err := p.findGroup(ctx, grp)
if err != nil {
if !errors.As(err, &errNotFound{}) {
log.Error(ctx, "failed to find group", zap.Error(err),
zap.String("group", grp))
return
}
if _, err := p.createGroup(ctx, &group{name: grp}); err != nil {
log.Error(ctx, "failed to provision group", zap.Error(err),
zap.String("group", grp))
return
}
log.Info(ctx, "created determined group", zap.String("group", grp))
} else {
log.Info(ctx, "determined group exists", zap.String("group", grp))
}
gs = append(gs, g)
}
if err := p.setUserGroups(ctx, u, gs); err != nil {
log.Error(ctx, "failed to set user groups", zap.Error(err),
zap.String("user", token.Email),
zap.Any("groups", token.Groups))
return
}
}
}
}
func idTokenFromBytes(ctx context.Context, b []byte) (*idToken, error) {
resp := &tokenResp{}
if err := json.Unmarshal(b, resp); err != nil {
msg := "failed to unmarshal /token response"
log.Error(ctx, msg, zap.Error(err))
return nil, errors.Wrap(err, msg)
}
tok, err := base64.RawStdEncoding.DecodeString(jwtPayload(resp.IDToken))
if err != nil {
msg := "failed to base64 decode ID token"
log.Error(ctx, msg, zap.Error(err),
zap.String("token", resp.IDToken))
return nil, errors.Wrap(err, msg)
}
token := new(idToken)
if err := json.Unmarshal(tok, token); err != nil {
msg := "failed to unmarshal /token response"
log.Error(ctx, msg, zap.Error(err))
return nil, errors.Wrap(err, msg)
}
return token, nil
}
type recordResponseWriter struct {
b *bytes.Buffer
rw http.ResponseWriter
statusCode int
}
func (rrw *recordResponseWriter) Write(b []byte) (int, error) {
i, err := rrw.rw.Write(b)
if err != nil {
return i, errors.Wrap(err, "write to response writer")
}
_, err = rrw.b.Write(b)
return i, errors.Wrap(err, "write to buffered response writer")
}
func (rrw *recordResponseWriter) Header() http.Header {
return rrw.rw.Header()
}
func (rrw *recordResponseWriter) WriteHeader(statusCode int) {
rrw.rw.WriteHeader(statusCode)
if rrw.statusCode != 0 {
rrw.statusCode = statusCode
}
}
func (w *dexWeb) provisioners(ctx context.Context) ([]provisioner, error) {
var ps []provisioner
if w.env.Config.DeterminedURL != "" {
d, err := newDeterminedProvisioner(ctx, determined.Config{
MasterURL: w.env.Config.DeterminedURL,
Username: w.env.Config.DeterminedUsername,
Password: w.env.Config.DeterminedPassword,
TLS: w.env.Config.DeterminedTLS,
})
if err != nil {
log.Error(ctx, "failed to instantiate determined user provisioner", zap.Error(err))
return nil, err
}
ps = append(ps, d)
}
return ps, nil
}
func jwtPayload(jwt string) string {
parts := strings.Split(jwt, ".")
if len(parts) > 1 {
return parts[1]
}
return ""
}