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Remove spaces between dn components, use warnings when necessary

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This commit is contained in:
Alex 2020-02-02 13:51:47 +01:00
parent 4c037dcb94
commit 0c801e02d5
5 changed files with 59 additions and 37 deletions
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2
bottin.hcl.example
View file

@ -12,7 +12,7 @@ job "directory" {
task "server" { task "server" {
driver = "docker" driver = "docker"
config { config {
image = "lxpz/bottin_amd64:5" image = "lxpz/bottin_amd64:6"
readonly_rootfs = true readonly_rootfs = true
port_map { port_map {
ldap_port = 389 ldap_port = 389

9
main.go
View file

@ -377,7 +377,14 @@ func (server *Server) objectExists(dn string) (bool, error) {
return len(data) > 0, nil return len(data) > 0, nil
} }
func (server *Server) checkSuffix(dn string, allow_extend bool) (string, error) { func (server *Server) checkDN(dn string, allow_extend bool) (string, error) {
// 1. Canonicalize: remove spaces between things
dn, err := canonicalDN(dn)
if err != nil {
return "", err
}
// 2. Check suffix (add it if allow_extend is set)
suffix := server.config.Suffix suffix := server.config.Suffix
if len(dn) < len(suffix) { if len(dn) < len(suffix) {
if dn != suffix[len(suffix)-len(dn):] || !allow_extend { if dn != suffix[len(suffix)-len(dn):] || !allow_extend {

16
read.go
View file

@ -24,11 +24,10 @@ func (server *Server) handleCompare(s ldap.UserState, w ldap.ResponseWriter, m *
} }
func (server *Server) handleCompareInternal(state *State, r *message.CompareRequest) (int, error) { func (server *Server) handleCompareInternal(state *State, r *message.CompareRequest) (int, error) {
dn := string(r.Entry())
attr := string(r.Ava().AttributeDesc()) attr := string(r.Ava().AttributeDesc())
expected := string(r.Ava().AssertionValue()) expected := string(r.Ava().AssertionValue())
_, err := server.checkSuffix(dn, false) dn, err := server.checkDN(string(r.Entry()), false)
if err != nil { if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err return ldap.LDAPResultInvalidDNSyntax, err
} }
@ -81,21 +80,22 @@ func (server *Server) handleSearch(s ldap.UserState, w ldap.ResponseWriter, m *l
func (server *Server) handleSearchInternal(state *State, w ldap.ResponseWriter, r *message.SearchRequest) (int, error) { func (server *Server) handleSearchInternal(state *State, w ldap.ResponseWriter, r *message.SearchRequest) (int, error) {
baseObject, err := server.checkDN(string(r.BaseObject()), true)
if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err
}
server.logger.Tracef("-- SEARCH REQUEST: --") server.logger.Tracef("-- SEARCH REQUEST: --")
server.logger.Tracef("Request BaseDn=%s", r.BaseObject()) server.logger.Tracef("Request BaseDn=%s", baseObject)
server.logger.Tracef("Request Filter=%s", r.Filter()) server.logger.Tracef("Request Filter=%s", r.Filter())
server.logger.Tracef("Request FilterString=%s", r.FilterString()) server.logger.Tracef("Request FilterString=%s", r.FilterString())
server.logger.Tracef("Request Attributes=%s", r.Attributes()) server.logger.Tracef("Request Attributes=%s", r.Attributes())
server.logger.Tracef("Request TimeLimit=%d", r.TimeLimit().Int()) server.logger.Tracef("Request TimeLimit=%d", r.TimeLimit().Int())
if !server.config.Acl.Check(&state.login, "read", string(r.BaseObject()), []string{}) { if !server.config.Acl.Check(&state.login, "read", baseObject, []string{}) {
return ldap.LDAPResultInsufficientAccessRights, fmt.Errorf("Please specify a base object on which you have read rights") return ldap.LDAPResultInsufficientAccessRights, fmt.Errorf("Please specify a base object on which you have read rights")
} }
baseObject, err := server.checkSuffix(string(r.BaseObject()), true)
if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err
}
basePath, err := dnToConsul(baseObject) basePath, err := dnToConsul(baseObject)
if err != nil { if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err return ldap.LDAPResultInvalidDNSyntax, err

20
util.go
View file

@ -98,13 +98,29 @@ func parseDN(dn string) ([]DNComponent, error) {
return nil, fmt.Errorf("Wrong DN component: %s (expected type=value)", rdn) return nil, fmt.Errorf("Wrong DN component: %s (expected type=value)", rdn)
} }
ret = append(ret, DNComponent{ ret = append(ret, DNComponent{
Type: splits[0], Type: strings.TrimSpace(splits[0]),
Value: splits[1], Value: strings.TrimSpace(splits[1]),
}) })
} }
return ret, nil return ret, nil
} }
func canonicalDN(dn string) (string, error) {
path, err := parseDN(dn)
if err != nil {
return "", err
}
ret := ""
for _, c := range path {
if ret != "" {
ret = ret + ","
}
ret = ret + c.Type + "=" + c.Value
}
return ret, nil
}
func checkRestrictedAttr(attr string) error { func checkRestrictedAttr(attr string) error {
RESTRICTED_ATTRS := []string{ RESTRICTED_ATTRS := []string{
ATTR_MEMBEROF, ATTR_MEMBEROF,

49
write.go
View file

@ -29,9 +29,7 @@ func (server *Server) handleAdd(s ldap.UserState, w ldap.ResponseWriter, m *ldap
} }
func (server *Server) handleAddInternal(state *State, r *message.AddRequest) (int, error) { func (server *Server) handleAddInternal(state *State, r *message.AddRequest) (int, error) {
dn := string(r.Entry()) dn, err := server.checkDN(string(r.Entry()), false)
_, err := server.checkSuffix(dn, false)
if err != nil { if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err return ldap.LDAPResultInvalidDNSyntax, err
} }
@ -80,18 +78,18 @@ func (server *Server) handleAddInternal(state *State, r *message.AddRequest) (in
if strings.EqualFold(key, ATTR_MEMBER) { if strings.EqualFold(key, ATTR_MEMBER) {
members = vals_str members = vals_str
for _, member := range members { for _, member := range members {
_, err := server.checkSuffix(member, false) member_canonical, err := server.checkDN(member, false)
if err != nil { if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err return ldap.LDAPResultInvalidDNSyntax, err
} }
exists, err = server.objectExists(member) exists, err = server.objectExists(member_canonical)
if err != nil { if err != nil {
return ldap.LDAPResultOperationsError, err return ldap.LDAPResultOperationsError, err
} }
if !exists { if !exists {
return ldap.LDAPResultNoSuchObject, fmt.Errorf( return ldap.LDAPResultNoSuchObject, fmt.Errorf(
"Cannot add %s to members, it does not exist!", "Cannot add %s to members, it does not exist!",
member) member_canonical)
} }
} }
} }
@ -103,7 +101,7 @@ func (server *Server) handleAddInternal(state *State, r *message.AddRequest) (in
entry[ATTR_ENTRYUUID] = []string{genUuid()} entry[ATTR_ENTRYUUID] = []string{genUuid()}
entry[dnSplit[0].Type] = []string{dnSplit[0].Value} entry[dnSplit[0].Type] = []string{dnSplit[0].Value}
// Add our intem in the DB // Add our item in the DB
err = server.addElements(dn, entry) err = server.addElements(dn, entry)
if err != nil { if err != nil {
return ldap.LDAPResultOperationsError, err return ldap.LDAPResultOperationsError, err
@ -116,7 +114,7 @@ func (server *Server) handleAddInternal(state *State, r *message.AddRequest) (in
for _, member := range members { for _, member := range members {
memberGroups, err := server.getAttribute(member, ATTR_MEMBEROF) memberGroups, err := server.getAttribute(member, ATTR_MEMBEROF)
if err != nil { if err != nil {
server.logger.Printf("Could not add %s to memberOf of %s: %s", dn, member, err) server.logger.Warnf("Could not add %s to memberOf of %s: %s", dn, member, err)
continue continue
} }
if memberGroups == nil { if memberGroups == nil {
@ -127,7 +125,7 @@ func (server *Server) handleAddInternal(state *State, r *message.AddRequest) (in
for _, mb := range memberGroups { for _, mb := range memberGroups {
if mb == dn { if mb == dn {
alreadyMember = true alreadyMember = true
server.logger.Printf("Warning: inconsistency detected, %s was memberOf %s at a time when it didn't exist!", server.logger.Warnf("Warning: inconsistency detected, %s was memberOf %s at a time when it didn't exist!",
member, dn) member, dn)
break break
} }
@ -139,7 +137,7 @@ func (server *Server) handleAddInternal(state *State, r *message.AddRequest) (in
ATTR_MEMBEROF: memberGroups, ATTR_MEMBEROF: memberGroups,
}) })
if err != nil { if err != nil {
server.logger.Printf("Could not add %s to memberOf of %s: %s", dn, member, err) server.logger.Warnf("Could not add %s to memberOf of %s: %s", dn, member, err)
} }
} }
} }
@ -169,9 +167,7 @@ func (server *Server) handleDelete(s ldap.UserState, w ldap.ResponseWriter, m *l
} }
func (server *Server) handleDeleteInternal(state *State, r *message.DelRequest) (int, error) { func (server *Server) handleDeleteInternal(state *State, r *message.DelRequest) (int, error) {
dn := string(*r) dn, err := server.checkDN(string(*r), false)
_, err := server.checkSuffix(dn, false)
if err != nil { if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err return ldap.LDAPResultInvalidDNSyntax, err
} }
@ -229,7 +225,7 @@ func (server *Server) handleDeleteInternal(state *State, r *message.DelRequest)
for _, group := range memberOf { for _, group := range memberOf {
groupMembers, err := server.getAttribute(group, ATTR_MEMBER) groupMembers, err := server.getAttribute(group, ATTR_MEMBER)
if err != nil { if err != nil {
server.logger.Printf("Could not remove %s from members of %s: %s", dn, group, err) server.logger.Warnf("Could not remove %s from members of %s: %s", dn, group, err)
continue continue
} }
@ -244,7 +240,7 @@ func (server *Server) handleDeleteInternal(state *State, r *message.DelRequest)
ATTR_MEMBER: newMembers, ATTR_MEMBER: newMembers,
}) })
if err != nil { if err != nil {
server.logger.Printf("Could not remove %s from members of %s: %s", dn, group, err) server.logger.Warnf("Could not remove %s from members of %s: %s", dn, group, err)
} }
} }
} }
@ -254,7 +250,7 @@ func (server *Server) handleDeleteInternal(state *State, r *message.DelRequest)
for _, member := range memberList { for _, member := range memberList {
memberOf, err := server.getAttribute(member, ATTR_MEMBEROF) memberOf, err := server.getAttribute(member, ATTR_MEMBEROF)
if err != nil || memberOf == nil { if err != nil || memberOf == nil {
server.logger.Printf("Could not remove %s from memberOf of %s: %s", dn, member, err) server.logger.Warnf("Could not remove %s from memberOf of %s: %s", dn, member, err)
continue continue
} }
@ -269,7 +265,7 @@ func (server *Server) handleDeleteInternal(state *State, r *message.DelRequest)
ATTR_MEMBEROF: newMemberOf, ATTR_MEMBEROF: newMemberOf,
}) })
if err != nil { if err != nil {
server.logger.Printf("Could not remove %s from memberOf of %s: %s", dn, member, err) server.logger.Warnf("Could not remove %s from memberOf of %s: %s", dn, member, err)
} }
} }
} }
@ -298,9 +294,7 @@ func (server *Server) handleModify(s ldap.UserState, w ldap.ResponseWriter, m *l
} }
func (server *Server) handleModifyInternal(state *State, r *message.ModifyRequest) (int, error) { func (server *Server) handleModifyInternal(state *State, r *message.ModifyRequest) (int, error) {
dn := string(r.Object()) dn, err := server.checkDN(string(r.Object()), false)
_, err := server.checkSuffix(dn, false)
if err != nil { if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err return ldap.LDAPResultInvalidDNSyntax, err
} }
@ -447,7 +441,11 @@ func (server *Server) handleModifyInternal(state *State, r *message.ModifyReques
} }
// Check that added members actually exist // Check that added members actually exist
for _, addMem := range addMembers { for i := range addMembers {
addMem, err := server.checkDN(addMembers[i], false)
if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err
}
exists, err := server.objectExists(addMem) exists, err := server.objectExists(addMem)
if err != nil { if err != nil {
return ldap.LDAPResultOperationsError, err return ldap.LDAPResultOperationsError, err
@ -456,6 +454,7 @@ func (server *Server) handleModifyInternal(state *State, r *message.ModifyReques
return ldap.LDAPResultNoSuchObject, fmt.Errorf( return ldap.LDAPResultNoSuchObject, fmt.Errorf(
"Cannot add member %s, it does not exist", addMem) "Cannot add member %s, it does not exist", addMem)
} }
addMembers[i] = addMem
} }
newEntry[ATTR_MODIFIERSNAME] = []string{state.login.user} newEntry[ATTR_MODIFIERSNAME] = []string{state.login.user}
@ -470,7 +469,7 @@ func (server *Server) handleModifyInternal(state *State, r *message.ModifyReques
for _, addMem := range addMembers { for _, addMem := range addMembers {
memberOf, err := server.getAttribute(addMem, ATTR_MEMBEROF) memberOf, err := server.getAttribute(addMem, ATTR_MEMBEROF)
if err != nil { if err != nil {
server.logger.Printf("Could not add %s to memberOf of %s: %s", dn, addMem, err) server.logger.Warnf("Could not add %s to memberOf of %s: %s", dn, addMem, err)
continue continue
} }
if memberOf == nil { if memberOf == nil {
@ -490,7 +489,7 @@ func (server *Server) handleModifyInternal(state *State, r *message.ModifyReques
ATTR_MEMBEROF: memberOf, ATTR_MEMBEROF: memberOf,
}) })
if err != nil { if err != nil {
server.logger.Printf("Could not add %s to memberOf of %s: %s", dn, addMem, err) server.logger.Warnf("Could not add %s to memberOf of %s: %s", dn, addMem, err)
} }
} }
} }
@ -498,7 +497,7 @@ func (server *Server) handleModifyInternal(state *State, r *message.ModifyReques
for _, delMem := range delMembers { for _, delMem := range delMembers {
memberOf, err := server.getAttribute(delMem, ATTR_MEMBEROF) memberOf, err := server.getAttribute(delMem, ATTR_MEMBEROF)
if err != nil { if err != nil {
server.logger.Printf("Could not remove %s from memberOf of %s: %s", dn, delMem, err) server.logger.Warnf("Could not remove %s from memberOf of %s: %s", dn, delMem, err)
continue continue
} }
if memberOf == nil { if memberOf == nil {
@ -513,7 +512,7 @@ func (server *Server) handleModifyInternal(state *State, r *message.ModifyReques
err = server.addElements(delMem, Entry{ATTR_MEMBEROF: newMemberOf}) err = server.addElements(delMem, Entry{ATTR_MEMBEROF: newMemberOf})
if err != nil { if err != nil {
server.logger.Printf("Could not remove %s from memberOf of %s: %s", dn, delMem, err) server.logger.Warnf("Could not remove %s from memberOf of %s: %s", dn, delMem, err)
} }
} }