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security.go
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security.go
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// Copyright 2018 Project Harbor Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package filter
import (
"context"
"fmt"
"net/http"
"regexp"
beegoctx "github.com/astaxie/beego/context"
"github.com/docker/distribution/reference"
"github.com/goharbor/harbor/src/common/models"
secstore "github.com/goharbor/harbor/src/common/secret"
"github.com/goharbor/harbor/src/common/security"
admr "github.com/goharbor/harbor/src/common/security/admiral"
"github.com/goharbor/harbor/src/common/security/admiral/authcontext"
"github.com/goharbor/harbor/src/common/security/local"
"github.com/goharbor/harbor/src/common/security/secret"
"github.com/goharbor/harbor/src/common/utils/log"
"github.com/goharbor/harbor/src/core/auth"
"github.com/goharbor/harbor/src/core/config"
"github.com/goharbor/harbor/src/core/promgr"
"github.com/goharbor/harbor/src/core/promgr/pmsdriver/admiral"
)
// ContextValueKey for content value
type ContextValueKey string
type pathMethod struct {
path string
method string
}
const (
// SecurCtxKey is context value key for security context
SecurCtxKey ContextValueKey = "harbor_security_context"
// PmKey is context value key for the project manager
PmKey ContextValueKey = "harbor_project_manager"
)
var (
reqCtxModifiers []ReqCtxModifier
// basic auth request context modifier only takes effect on the patterns
// in the slice
basicAuthReqPatterns = []*pathMethod{
// create project
{
path: "/api/projects",
method: http.MethodPost,
},
// token service
{
path: "/service/token",
method: http.MethodGet,
},
// delete repository
{
path: "/api/repositories/" + reference.NameRegexp.String(),
method: http.MethodDelete,
},
// delete tag
{
path: "/api/repositories/" + reference.NameRegexp.String() + "/tags/" + reference.TagRegexp.String(),
method: http.MethodDelete,
},
}
)
// Init ReqCtxMofiers list
func Init() {
// integration with admiral
if config.WithAdmiral() {
reqCtxModifiers = []ReqCtxModifier{
&secretReqCtxModifier{config.SecretStore},
&tokenReqCtxModifier{},
&basicAuthReqCtxModifier{},
&unauthorizedReqCtxModifier{}}
return
}
// standalone
reqCtxModifiers = []ReqCtxModifier{
&secretReqCtxModifier{config.SecretStore},
&basicAuthReqCtxModifier{},
&sessionReqCtxModifier{},
&unauthorizedReqCtxModifier{}}
}
// SecurityFilter authenticates the request and passes a security context
// and a project manager with it which can be used to do some authN & authZ
func SecurityFilter(ctx *beegoctx.Context) {
if ctx == nil {
return
}
req := ctx.Request
if req == nil {
return
}
// add security context and project manager to request context
for _, modifier := range reqCtxModifiers {
if modifier.Modify(ctx) {
break
}
}
}
// ReqCtxModifier modifies the context of request
type ReqCtxModifier interface {
Modify(*beegoctx.Context) bool
}
type secretReqCtxModifier struct {
store *secstore.Store
}
func (s *secretReqCtxModifier) Modify(ctx *beegoctx.Context) bool {
scrt := secstore.FromRequest(ctx.Request)
if len(scrt) == 0 {
return false
}
log.Debug("got secret from request")
log.Debug("using global project manager")
pm := config.GlobalProjectMgr
log.Debug("creating a secret security context...")
securCtx := secret.NewSecurityContext(scrt, s.store)
setSecurCtxAndPM(ctx.Request, securCtx, pm)
return true
}
type basicAuthReqCtxModifier struct{}
func (b *basicAuthReqCtxModifier) Modify(ctx *beegoctx.Context) bool {
username, password, ok := ctx.Request.BasicAuth()
if !ok {
return false
}
log.Debug("got user information via basic auth")
// integration with admiral
if config.WithAdmiral() {
// Can't get a token from Admiral's login API, we can only
// create a project manager with the token of the solution user.
// That way may cause some wrong permission promotion in some API
// calls, so we just handle the requests which are necessary
match := false
var err error
path := ctx.Request.URL.Path
for _, pattern := range basicAuthReqPatterns {
match, err = regexp.MatchString(pattern.path, path)
if err != nil {
log.Errorf("failed to match %s with pattern %s", path, pattern)
continue
}
if match {
break
}
}
if !match {
log.Debugf("basic auth is not supported for request %s %s, skip",
ctx.Request.Method, ctx.Request.URL.Path)
return false
}
token, err := config.TokenReader.ReadToken()
if err != nil {
log.Errorf("failed to read solution user token: %v", err)
return false
}
authCtx, err := authcontext.Login(config.AdmiralClient,
config.AdmiralEndpoint(), username, password, token)
if err != nil {
log.Errorf("failed to authenticate %s: %v", username, err)
return false
}
log.Debug("using global project manager...")
pm := config.GlobalProjectMgr
log.Debug("creating admiral security context...")
securCtx := admr.NewSecurityContext(authCtx, pm)
setSecurCtxAndPM(ctx.Request, securCtx, pm)
return true
}
// standalone
user, err := auth.Login(models.AuthModel{
Principal: username,
Password: password,
})
if err != nil {
log.Errorf("failed to authenticate %s: %v", username, err)
return false
}
if user == nil {
log.Debug("basic auth user is nil")
return false
}
log.Debug("using local database project manager")
pm := config.GlobalProjectMgr
log.Debug("creating local database security context...")
securCtx := local.NewSecurityContext(user, pm)
setSecurCtxAndPM(ctx.Request, securCtx, pm)
return true
}
type sessionReqCtxModifier struct{}
func (s *sessionReqCtxModifier) Modify(ctx *beegoctx.Context) bool {
var user models.User
userInterface := ctx.Input.Session("user")
if userInterface == nil {
log.Debug("can not get user information from session")
return false
}
log.Debug("got user information from session")
user, ok := userInterface.(models.User)
if !ok {
log.Info("can not get user information from session")
return false
}
log.Debug("Getting user %+v", user)
log.Debug("using local database project manager")
pm := config.GlobalProjectMgr
log.Debug("creating local database security context...")
securCtx := local.NewSecurityContext(&user, pm)
setSecurCtxAndPM(ctx.Request, securCtx, pm)
return true
}
type tokenReqCtxModifier struct{}
func (t *tokenReqCtxModifier) Modify(ctx *beegoctx.Context) bool {
token := ctx.Request.Header.Get(authcontext.AuthTokenHeader)
if len(token) == 0 {
return false
}
log.Debug("got token from request")
authContext, err := authcontext.GetAuthCtx(config.AdmiralClient,
config.AdmiralEndpoint(), token)
if err != nil {
log.Errorf("failed to get auth context: %v", err)
return false
}
log.Debug("creating PMS project manager...")
driver := admiral.NewDriver(config.AdmiralClient,
config.AdmiralEndpoint(), &admiral.RawTokenReader{
Token: token,
})
pm := promgr.NewDefaultProjectManager(driver, false)
log.Debug("creating admiral security context...")
securCtx := admr.NewSecurityContext(authContext, pm)
setSecurCtxAndPM(ctx.Request, securCtx, pm)
return true
}
// use this one as the last modifier in the modifier list for unauthorized request
type unauthorizedReqCtxModifier struct{}
func (u *unauthorizedReqCtxModifier) Modify(ctx *beegoctx.Context) bool {
log.Debug("user information is nil")
var securCtx security.Context
var pm promgr.ProjectManager
if config.WithAdmiral() {
// integration with admiral
log.Debug("creating PMS project manager...")
driver := admiral.NewDriver(config.AdmiralClient,
config.AdmiralEndpoint(), nil)
pm = promgr.NewDefaultProjectManager(driver, false)
log.Debug("creating admiral security context...")
securCtx = admr.NewSecurityContext(nil, pm)
} else {
// standalone
log.Debug("using local database project manager")
pm = config.GlobalProjectMgr
log.Debug("creating local database security context...")
securCtx = local.NewSecurityContext(nil, pm)
}
setSecurCtxAndPM(ctx.Request, securCtx, pm)
return true
}
func setSecurCtxAndPM(req *http.Request, ctx security.Context, pm promgr.ProjectManager) {
addToReqContext(req, SecurCtxKey, ctx)
addToReqContext(req, PmKey, pm)
}
func addToReqContext(req *http.Request, key, value interface{}) {
*req = *(req.WithContext(context.WithValue(req.Context(), key, value)))
}
// GetSecurityContext tries to get security context from request and returns it
func GetSecurityContext(req *http.Request) (security.Context, error) {
if req == nil {
return nil, fmt.Errorf("request is nil")
}
ctx := req.Context().Value(SecurCtxKey)
if ctx == nil {
return nil, fmt.Errorf("the security context got from request is nil")
}
c, ok := ctx.(security.Context)
if !ok {
return nil, fmt.Errorf("the variable got from request is not security context type")
}
return c, nil
}
// GetProjectManager tries to get project manager from request and returns it
func GetProjectManager(req *http.Request) (promgr.ProjectManager, error) {
if req == nil {
return nil, fmt.Errorf("request is nil")
}
pm := req.Context().Value(PmKey)
if pm == nil {
return nil, fmt.Errorf("the project manager got from request is nil")
}
p, ok := pm.(promgr.ProjectManager)
if !ok {
return nil, fmt.Errorf("the variable got from request is not project manager type")
}
return p, nil
}