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pydioWrapperMiddlewares.go
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pydioWrapperMiddlewares.go
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package dex
import (
"context"
"encoding/json"
"fmt"
"strconv"
"github.com/coreos/dex/connector"
"github.com/micro/go-micro/errors"
"go.uber.org/zap"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/micro"
"github.com/pydio/cells/common/proto/idm"
"github.com/pydio/cells/common/utils/permissions"
)
// WrapperConnectorOperation holds all necessary information to perform auth actions using the middleware pattern.
type WrapperConnectorOperation struct {
OperationType string
Scopes connector.Scopes
Login string
Password string
LoginError bool
ValidUsername string
AuthSource string
User *idm.User
Identity connector.Identity
}
type WrapperConnectorProvider func(ctx context.Context, in *WrapperConnectorOperation) (*WrapperConnectorOperation, error)
type WrapperConnectorMiddleware func(wrapperConnector WrapperConnectorProvider) WrapperConnectorProvider
var (
wrapperMiddlewares = make(map[string][]WrapperConnectorMiddleware)
)
// RegisterWrapperConnectorMiddleware appends a new connector middleware to the array of already existing middleware for this operation.
func RegisterWrapperConnectorMiddleware(operation string, middleware WrapperConnectorMiddleware) {
wrapperMiddlewares[operation] = append(wrapperMiddlewares[operation], middleware)
}
// ApplyWrapperConnectorMiddlewares effectively calls each middleware that have been registered for this operation.
func ApplyWrapperConnectorMiddlewares(ctx context.Context, in *WrapperConnectorOperation, coreProvider WrapperConnectorProvider) (*WrapperConnectorOperation, error) {
var p WrapperConnectorProvider
if coreProvider == nil {
p = func(ctx context.Context, in *WrapperConnectorOperation) (*WrapperConnectorOperation, error) {
return in, nil
}
} else {
p = coreProvider
}
if middlewares, ok := wrapperMiddlewares[in.OperationType]; ok {
for _, m := range middlewares {
p = m(p)
}
}
return p(ctx, in)
}
// WrapWithIdmUser retrieves an IDM user with her login and adds it to the current operation.
func WrapWithIdmUser(middleware WrapperConnectorProvider) WrapperConnectorProvider {
return func(ctx context.Context, op *WrapperConnectorOperation) (*WrapperConnectorOperation, error) {
var e error
op, e = middleware(ctx, op)
if e != nil {
return op, e
}
if op.ValidUsername != "" {
u, er := permissions.SearchUniqueUser(ctx, op.ValidUsername, "")
if e != nil {
return op, er
}
op.User = u
return op, nil
}
return op, e
}
}
// WrapWithPolicyCheck checks policies for the current user and updates passed operation.
func WrapWithPolicyCheck(middleware WrapperConnectorProvider) WrapperConnectorProvider {
return func(ctx context.Context, op *WrapperConnectorOperation) (*WrapperConnectorOperation, error) {
var e error
op, e = middleware(ctx, op)
if e != nil || op.User == nil {
return op, e
}
user := op.User
cli := idm.NewPolicyEngineServiceClient(common.SERVICE_GRPC_NAMESPACE_+common.SERVICE_POLICY, defaults.NewClient())
policyContext := make(map[string]string)
permissions.PolicyContextFromMetadata(policyContext, ctx)
subjects := permissions.PolicyRequestSubjectsFromUser(user)
// Check all subjects, if one has deny return false
policyRequest := &idm.PolicyEngineRequest{
Subjects: subjects,
Resource: "oidc",
Action: "login",
Context: policyContext,
}
if resp, err := cli.IsAllowed(ctx, policyRequest); err != nil || resp.Allowed == false {
log.Auditer(ctx).Error(
"Policy denied login to ["+user.Login+"]",
log.GetAuditId(common.AUDIT_LOGIN_POLICY_DENIAL),
zap.String(common.KEY_USER_UUID, user.Uuid),
zap.Any(common.KEY_POLICY_REQUEST, policyRequest),
zap.Error(err),
)
log.Logger(ctx).Error("policy denies login for request", zap.Any(common.KEY_POLICY_REQUEST, policyRequest), zap.Error(err))
return op, errors.Unauthorized(common.SERVICE_USER, "User "+user.Login+" is not authorized to log in")
}
return op, nil
}
}
// WrapWithUserLocks manages lock after too many fail attemps. It also reset the counter on login success.
func WrapWithUserLocks(middleware WrapperConnectorProvider) WrapperConnectorProvider {
return func(ctx context.Context, op *WrapperConnectorOperation) (*WrapperConnectorOperation, error) {
var opE error
op, opE = middleware(ctx, op)
// User loaded - Additional checks *even* after successful login
if user := op.User; user != nil {
// Insure user has not been locked out
if permissions.IsUserLocked(user) {
log.Auditer(ctx).Error(
"Locked user ["+user.Login+"] tried to log in.",
log.GetAuditId(common.AUDIT_LOGIN_POLICY_DENIAL),
zap.String(common.KEY_USER_UUID, user.Uuid),
)
log.Logger(ctx).Error("lock denies login for "+user.Login, zap.Error(fmt.Errorf("blocked login")))
return op, errors.Unauthorized(common.SERVICE_USER, "User "+user.Login+" has been blocked. Contact your sysadmin.")
}
// Reset failed connections
if user.Attributes != nil {
if _, ok := user.Attributes["failedConnections"]; ok {
log.Logger(ctx).Info("[WrapWithUserLocks] Resetting user failedConnections", user.ZapLogin())
userClient := idm.NewUserServiceClient(common.SERVICE_GRPC_NAMESPACE_+common.SERVICE_USER, defaults.NewClient())
delete(user.Attributes, "failedConnections")
userClient.CreateUser(ctx, &idm.CreateUserRequest{User: user})
}
}
}
// Failed login - increment failed attemps
if opE != nil && op.LoginError {
const maxFailedLogins = 10
if u, e := permissions.SearchUniqueUser(ctx, op.Login, ""); e == nil && u != nil {
// double check if user was already locked to reduce work load
if permissions.IsUserLocked(u) {
msg := fmt.Sprintf("locked user %s is still trying to connect", u.GetLogin())
log.Logger(ctx).Warn(msg, u.ZapLogin())
return op, opE
}
var failedInt int64
if u.Attributes == nil {
u.Attributes = make(map[string]string)
}
if failed, ok := u.Attributes["failedConnections"]; ok {
failedInt, _ = strconv.ParseInt(failed, 10, 32)
}
failedInt++
u.Attributes["failedConnections"] = fmt.Sprintf("%d", failedInt)
if failedInt >= maxFailedLogins {
// Set lock via attributes
var locks []string
if l, ok := u.Attributes["locks"]; ok {
var existingLocks []string
if e := json.Unmarshal([]byte(l), &existingLocks); e == nil {
for _, lock := range existingLocks {
if lock != "logout" {
locks = append(locks, lock)
}
}
}
}
locks = append(locks, "logout")
data, _ := json.Marshal(locks)
u.Attributes["locks"] = string(data)
msg := fmt.Sprintf("Locked user [%s] after %d failed connections", u.GetLogin(), maxFailedLogins)
log.Logger(ctx).Error(msg, u.ZapLogin())
log.Auditer(ctx).Error(
msg,
log.GetAuditId(common.AUDIT_LOCK_USER),
u.ZapLogin(),
zap.String(common.KEY_USER_UUID, u.GetUuid()),
)
}
log.Logger(ctx).Debug(fmt.Sprintf("[WrapWithUserLocks] Updating failed connection number for user [%s]", u.GetLogin()), u.ZapLogin())
userClient := idm.NewUserServiceClient(common.SERVICE_GRPC_NAMESPACE_+common.SERVICE_USER, defaults.NewClient())
if _, e := userClient.CreateUser(ctx, &idm.CreateUserRequest{User: u}); e != nil {
log.Logger(ctx).Error("could not store failedConnection for user", zap.Error(e))
}
}
}
return op, opE
}
}
// WrapWithIdentity converts the op.User to an identity and stores it in the current operation.
func WrapWithIdentity(middleware WrapperConnectorProvider) WrapperConnectorProvider {
return func(ctx context.Context, op *WrapperConnectorOperation) (*WrapperConnectorOperation, error) {
if op.OperationType == "Refresh" && op.Identity.Username != "" {
op.ValidUsername = op.Identity.Username
}
var e error
op, e = middleware(ctx, op)
log.Logger(ctx).Debug("[WrapWithIdentity]", zap.Any("op", op), zap.Error(e))
if e != nil || op.User == nil {
return op, e
}
op.Identity = ConvertUserApiToIdentity(op.User, op.AuthSource)
return op, nil
}
}