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// Copyright 2015 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package privilege
import (
"crypto/tls"
"github.com/pingcap/parser/auth"
"github.com/pingcap/parser/mysql"
"github.com/pingcap/tidb/sessionctx"
"github.com/pingcap/tidb/types"
)
type keyType int
func (k keyType) String() string {
return "privilege-key"
}
// Manager is the interface for providing privilege related operations.
type Manager interface {
// ShowGrants shows granted privileges for user.
ShowGrants(ctx sessionctx.Context, user *auth.UserIdentity, roles []*auth.RoleIdentity) ([]string, error)
// GetEncodedPassword shows the encoded password for user.
GetEncodedPassword(user, host string) string
// RequestVerification verifies user privilege for the request.
// If table is "", only check global/db scope privileges.
// If table is not "", check global/db/table scope privileges.
// priv should be a defined constant like CreatePriv, if pass AllPrivMask to priv,
// this means any privilege would be OK.
RequestVerification(activeRole []*auth.RoleIdentity, db, table, column string, priv mysql.PrivilegeType) bool
// RequestVerificationWithUser verifies specific user privilege for the request.
RequestVerificationWithUser(db, table, column string, priv mysql.PrivilegeType, user *auth.UserIdentity) bool
// ConnectionVerification verifies user privilege for connection.
ConnectionVerification(user, host string, auth, salt []byte, tlsState *tls.ConnectionState) (string, string, bool)
// GetAuthWithoutVerification uses to get auth name without verification.
GetAuthWithoutVerification(user, host string) (string, string, bool)
// DBIsVisible returns true is the database is visible to current user.
DBIsVisible(activeRole []*auth.RoleIdentity, db string) bool
// UserPrivilegesTable provide data for INFORMATION_SCHEMA.USERS_PRIVILEGE table.
UserPrivilegesTable() [][]types.Datum
// ActiveRoles active roles for current session.
// The first illegal role will be returned.
ActiveRoles(ctx sessionctx.Context, roleList []*auth.RoleIdentity) (bool, string)
// FindEdge find if there is an edge between role and user.
FindEdge(ctx sessionctx.Context, role *auth.RoleIdentity, user *auth.UserIdentity) bool
// GetDefaultRoles returns all default roles for certain user.
GetDefaultRoles(user, host string) []*auth.RoleIdentity
// GetAllRoles return all roles of user.
GetAllRoles(user, host string) []*auth.RoleIdentity
}
const key keyType = 0
// BindPrivilegeManager binds Manager to context.
func BindPrivilegeManager(ctx sessionctx.Context, pc Manager) {
ctx.SetValue(key, pc)
}
// GetPrivilegeManager gets Checker from context.
func GetPrivilegeManager(ctx sessionctx.Context) Manager {
if v, ok := ctx.Value(key).(Manager); ok {
return v
}
return nil
}