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groups.go
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groups.go
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package main
import (
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"log"
"net/http"
"time"
"github.com/go-chi/chi"
"github.com/go-chi/render"
)
// Group desc
// https://stackoverflow.com/questions/37657772/how-to-build-dynamic-structure-in-golang
type Group struct {
GroupName string `json:"group_name"`
LdapGroupName string `json:"ldap_group_name"`
CustomProperties map[string]string `json:"custom_properties"`
LeaseTime int `json:"lease_time"`
CreateTime int64 `json:"create_time"`
CreateBy string `json:"create_by"`
}
// GroupDB desc
type GroupDB struct {
id int64
GroupName string
LdapGroupName string
CustomProperties string
LeaseTime int
CreateTime int64
CreateBy string
}
func (s *server) CreateGroup(w http.ResponseWriter, r *http.Request) {
// Get ldap group name from URL
lg := chi.URLParam(r, "LDAPGroupName")
var LDAPUser, err = s.getLDAPUser(r)
// Check ldap user
if !LDAPUser.Admin || err != nil {
error := ErrorForbidden()
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
}
// Create group struct
var g Group
// Unmarshal body and check for errors
b, err := ioutil.ReadAll(r.Body)
if err != nil {
error := ErrorValidation()
error.AddMessage("body", "Cannot read body")
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
}
err = json.Unmarshal(b, &g)
if err != nil {
error := ErrorValidation()
error.AddMessage("body", "Cannot parse JSON")
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
}
// Set LDAP group name
g.LdapGroupName = lg
// Chech matching LDAP group exits and user has access
lcheck, err := s.lc.CheckLDAPGroup(g.LdapGroupName, LDAPUser.Username)
if err != nil {
error := ErrorLDAPConn()
error.AddMessage("ldap", fmt.Sprintf("LDAP backend: %s", err))
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
} else if !lcheck.exists {
error := ErrorAssetNotFound()
error.AddMessage("ldap_group_name", "LDAP group does not exist")
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
} else if !lcheck.authorized {
error := ErrorForbidden()
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
}
if validErrs := g.validateCreateGroup(s); len(validErrs.GetMessages()) > 0 {
render.Status(r, validErrs.StatusCode)
render.JSON(w, r, validErrs)
return
}
// Check if already exists
groupAlreadyExists, _ := s.GetGroup(g.GroupName)
if groupAlreadyExists.GroupName != "" {
error := ErrorAssetAlreadyExists()
error.AddMessage("group_name", "Group already exists")
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
}
g.CreateTime = time.Now().Unix()
g.CreateBy = LDAPUser.Username
cstring, err := json.Marshal(g.CustomProperties) // take user input and create string
// Check for null and set empty array instead
if string(cstring) == "null" {
cstring = []byte("{}")
}
insert, err := s.db.Prepare("INSERT INTO groups (group_name, ldap_group_name, lease_time, custom_properties, deleted, create_by, create_time) values(?,?,?,?,?,?,?)")
if err != nil {
// handle this error better than this
log.Printf("ERROR: preparing insert statement %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
// Use group name as LDAP group name
_, err = insert.Exec(g.GroupName, g.LdapGroupName, g.LeaseTime, cstring, 0, g.CreateBy, g.CreateTime)
if err != nil {
// handle this error better than this
log.Printf("ERROR: Inserting into DB %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
render.Status(r, 201)
render.JSON(w, r, g)
return
}
func (g *Group) validateCreateGroup(s *server) ErrorAPI {
err := ErrorValidation()
// check if the title empty
if g.GroupName == "" {
err.AddMessage("group_name", "The group_name field is required!")
}
if len(g.GroupName) < 2 || len(g.GroupName) > 120 {
err.AddMessage("group_name", "The group_name field must be between 2-120 chars!")
}
// check if the title empty
if g.LeaseTime == 0 {
err.AddMessage("lease_time", "The lease_time field is required!")
}
// check the title field is between 3 to 120 chars
if g.LeaseTime < 60 || g.LeaseTime > 20160 {
err.AddMessage("lease_time", "The lease_time field must be between 1h (60) and 1y (20160)")
}
return err
}
func (g *Group) validateUpdateGroup(s *server) ErrorAPI {
err := ErrorValidation()
if g.GroupName != "" && (len(g.GroupName) < 2 || len(g.GroupName) > 120) {
err.AddMessage("group_name", "The group_name field must be between 2-120 chars!")
}
// check the title field is between 3 to 120 chars
if g.LeaseTime > 0 && (g.LeaseTime < 60 || g.LeaseTime > 20160) {
err.AddMessage("lease_time", "The lease_time field must be between 1h (60) and 1y (20160)")
}
return err
}
// GetGroup - returns group from db
func (s *server) GetGroup(groupName string) (GroupDB, error) {
sqlStatement := `SELECT id, ldap_group_name, lease_time, custom_properties, create_time, create_by FROM groups WHERE deleted=0 AND group_name=$1;`
row := s.db.QueryRow(sqlStatement, groupName)
var id int64
var ldapGroupName string
var leaseTime int
var customProperties string
var createTime int64
var createBy string
switch err := row.Scan(&id, &ldapGroupName, &leaseTime, &customProperties, &createTime, &createBy); err {
case nil:
return GroupDB{
id: id,
GroupName: groupName,
LdapGroupName: ldapGroupName,
LeaseTime: leaseTime,
CustomProperties: customProperties,
CreateTime: createTime,
CreateBy: createBy,
}, nil
}
return GroupDB{}, errors.New("No group was found")
}
func (s *server) GetAllGroups(w http.ResponseWriter, r *http.Request) {
var groups []Group
rows, err := s.db.Query("SELECT group_name, ldap_group_name, lease_time, custom_properties, create_time, create_by FROM groups WHERE deleted=0 ORDER BY ldap_group_name, group_name;")
if err != nil {
// handle this error better than this
log.Printf("ERROR: connecting to DB: %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
for rows.Next() {
var c map[string]string
var groupName string
var ldapGroupName string
var leaseTime int
var customProperties string
var createTime int64
var createBy string
err = rows.Scan(&groupName, &ldapGroupName, &leaseTime, &customProperties, &createTime, &createBy)
if err != nil {
// handle this error better than this
log.Printf("ERROR: looping through DB rows: %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
err = json.Unmarshal([]byte(customProperties), &c)
if err != nil {
log.Printf("Error with custom properties: %+v", c)
error := ErrorValidation()
error.AddMessage("body", "Cannot parse JSON from DB")
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
}
groups = append(groups, Group{
GroupName: groupName,
LdapGroupName: ldapGroupName,
LeaseTime: leaseTime,
CustomProperties: c,
CreateTime: createTime,
CreateBy: createBy,
})
}
// get any error encountered during iteration
err = rows.Err()
if err != nil {
// handle this error better than this
log.Printf("ERROR: handling DB rows: %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
render.JSON(w, r, groups)
return
}
func (s *server) UpdateGroup(w http.ResponseWriter, r *http.Request) {
var LDAPUser, err = s.getLDAPUser(r)
// Check ldap user
if !LDAPUser.Admin || err != nil {
render.Status(r, 403)
render.JSON(w, r, nil)
return
}
gdb, err := s.GetGroup(chi.URLParam(r, "GroupName"))
if err != nil {
error := ErrorAssetNotFound()
error.AddMessage("asset", "Group was not found")
render.Status(r, 404)
render.JSON(w, r, error)
return
}
// Create group struct
var gpatch Group
// Unmarshal body and check for errors
b, err := ioutil.ReadAll(r.Body)
if err != nil {
error := ErrorValidation()
error.AddMessage("body", "Cannot read body")
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
}
err = json.Unmarshal(b, &gpatch)
if validErrs := gpatch.validateUpdateGroup(s); len(validErrs.GetMessages()) > 0 {
render.Status(r, validErrs.StatusCode)
render.JSON(w, r, validErrs)
return
}
// set group to deleted
update, err := s.db.Prepare("UPDATE groups SET group_name=$1, lease_time=$2, custom_properties=$3 WHERE id=$5 AND deleted=0;")
if err != nil {
log.Printf("Error: Could not prepare statement %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
// Update only fields that have changed
if gpatch.GroupName != "" && gpatch.GroupName != gdb.GroupName {
gdb.GroupName = gpatch.GroupName
}
if gpatch.LeaseTime != 0 && gpatch.LeaseTime != gdb.LeaseTime {
gdb.LeaseTime = gpatch.LeaseTime
}
// Create json string from patched object
cpstr, err := json.Marshal(gpatch.CustomProperties) // take user input and create string
if string(cpstr) != "null" && string(cpstr) != gdb.CustomProperties && len(gpatch.CustomProperties) > 0 {
gdb.CustomProperties = string(cpstr)
} else if string(cpstr) == "{}" {
gdb.CustomProperties = "{}"
}
_, err = update.Exec(gdb.GroupName, gdb.LeaseTime, gdb.CustomProperties, gdb.id)
if err != nil {
log.Printf("Could not update db: %s", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
// Create grpup return object
var gr Group
var c map[string]string
gr.GroupName = gdb.GroupName
gr.LdapGroupName = gdb.LdapGroupName
gr.LeaseTime = gdb.LeaseTime
err = json.Unmarshal([]byte(gdb.CustomProperties), &c)
gr.CustomProperties = c
gr.CreateBy = gdb.CreateBy
gr.CreateTime = gdb.CreateTime
render.Status(r, 200)
render.JSON(w, r, gr)
return
}
func (s *server) DeleteGroup(w http.ResponseWriter, r *http.Request) {
var LDAPUser, err = s.getLDAPUser(r)
// Check ldap user
if !LDAPUser.Admin || err != nil {
render.Status(r, 403)
render.JSON(w, r, nil)
return
}
g, err := s.GetGroup(chi.URLParam(r, "GroupName"))
if err != nil {
render.Status(r, 404)
render.JSON(w, r, nil)
return
}
// expire all users
err = s.ExpireUsersInGroup(g.id, LDAPUser.Username)
if err != nil {
log.Printf("Error: %s", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
// set group to deleted
update, err := s.db.Prepare("UPDATE groups SET deleted=1 WHERE id=$1;")
if err != nil {
log.Printf("Error: Could not prepare statement %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
_, err = update.Exec(g.id)
if err != nil {
log.Printf("Could not update db")
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
render.Status(r, 204)
render.JSON(w, r, nil)
return
}
func (s *server) GetAllGroupsInLDAPScope(w http.ResponseWriter, r *http.Request) {
lg := chi.URLParam(r, "LDAPGroupName")
var groups []Group
// Get all users in a specific group
rows, err := s.db.Query("SELECT groups.group_name, groups.ldap_group_name, groups.lease_time, groups.custom_properties, groups.create_time, groups.create_by FROM groups WHERE groups.deleted=0 AND groups.ldap_group_name=$1;", lg)
if err != nil {
// handle this error better than this
log.Printf("ERROR: connecting to DB: %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
for rows.Next() {
var c map[string]string
var groupName string
var ldapGroupName string
var LeaseTime int
var customProperties string
var createTime int64
var createBy string
err = rows.Scan(&groupName, &ldapGroupName, &LeaseTime, &customProperties, &createTime, &createBy)
if err != nil {
// handle this error better than this
log.Printf("ERROR: looping through DB rows: %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
err = json.Unmarshal([]byte(customProperties), &c)
if err != nil {
log.Printf("Error with custom properties: %+v", c)
error := ErrorValidation()
error.AddMessage("body", "Cannot parse JSON from DB")
render.Status(r, error.StatusCode)
render.JSON(w, r, error)
return
}
groups = append(groups, Group{
GroupName: groupName,
LdapGroupName: ldapGroupName,
CustomProperties: c,
LeaseTime: LeaseTime,
CreateTime: createTime,
CreateBy: createBy,
})
}
// get any error encountered during iteration
err = rows.Err()
if err != nil {
// handle this error better than this
log.Printf("ERROR: handling DB rows: %+v", err)
render.Status(r, 500)
render.JSON(w, r, nil)
return
}
render.Status(r, 200)
render.JSON(w, r, groups)
return
}