From a6ac8f680062069b2821214f5b74cc96673ee4ca Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Wed, 26 Aug 2015 12:09:06 -0600 Subject: clean up --- src/nslcd_proto/.gitignore | 6 + src/nslcd_proto/Makefile | 31 +++ src/nslcd_proto/enumerator@T.got | 26 ++ src/nslcd_proto/func_handlerequest.go.sh | 54 ++++ src/nslcd_proto/io.go | 149 ++++++++++ src/nslcd_proto/nslcd_h.go | 449 +++++++++++++++++++++++++++++++ src/nslcd_proto/struct_backend.go.sh | 10 + src/nslcd_proto/util.go | 62 +++++ 8 files changed, 787 insertions(+) create mode 100644 src/nslcd_proto/.gitignore create mode 100644 src/nslcd_proto/Makefile create mode 100644 src/nslcd_proto/enumerator@T.got create mode 100755 src/nslcd_proto/func_handlerequest.go.sh create mode 100644 src/nslcd_proto/io.go create mode 100644 src/nslcd_proto/nslcd_h.go create mode 100755 src/nslcd_proto/struct_backend.go.sh create mode 100644 src/nslcd_proto/util.go (limited to 'src/nslcd_proto') diff --git a/src/nslcd_proto/.gitignore b/src/nslcd_proto/.gitignore new file mode 100644 index 0000000..8a88ae3 --- /dev/null +++ b/src/nslcd_proto/.gitignore @@ -0,0 +1,6 @@ +/struct_backend.go +/func_handlerequest.go +/requests.txt +/responses.txt +/enumerator-list.mk +*@*.go diff --git a/src/nslcd_proto/Makefile b/src/nslcd_proto/Makefile new file mode 100644 index 0000000..2014bdd --- /dev/null +++ b/src/nslcd_proto/Makefile @@ -0,0 +1,31 @@ +all: struct_backend.go func_handlerequest.go +.PHONY: all + +clean: + rm -f -- struct_backend.go func_handlerequest.go enumerator@*.go + rm -f -- enumerator-list.mk requests.txt responses.txt +.PHONY: clean + +ifeq (,$(filter clean,$(MAKECMDGOALS))) +-include enumerator-list.mk +endif + +enumerator@%.go: enumerator@T.got + < $< sed 's//$*/g' > $@ + +enumerator-list.mk: responses.txt Makefile + < $< sed -rn 's/.*/all: enumerator@&.go/p' > $@ + +requests.txt: nslcd_h.go Makefile + < $< grep -Eo 'Request_([^_ ]+)(_\S+)?' | sed 's/^Request_//' > $@ +responses.txt: struct_backend.go Makefile + < $< sed -rn 's/.* (\S+)_Enumerator$$/\1/p' | sort -u > $@ + +%.go: %.go.sh + ./$^ > $@ + +struct_backend.go: requests.txt +func_handlerequest.go: requests.txt + +.DELETE_ON_ERROR: +.SECONDARY: diff --git a/src/nslcd_proto/enumerator@T.got b/src/nslcd_proto/enumerator@T.got new file mode 100644 index 0000000..88c3603 --- /dev/null +++ b/src/nslcd_proto/enumerator@T.got @@ -0,0 +1,26 @@ +// -*- Mode: Go -*- +package nslcd_proto + +type _Enumerator interface { + GetNext() (n , err error) + GenericGetNext() (n interface{}, err error) +} + +type _List struct { + dat [] + i int +} + +func New__List(ary []) *_List { + return &_List{ary, 0} +} + +func (o *_List) GetNext() (n , err error) { + n = o.dat[o.i] + err = nil + o.i++ + return +} +func (o *_List) GenericGetNext() (n interface{}, err error) { + return o.GetNext() +} diff --git a/src/nslcd_proto/func_handlerequest.go.sh b/src/nslcd_proto/func_handlerequest.go.sh new file mode 100755 index 0000000..0f0c686 --- /dev/null +++ b/src/nslcd_proto/func_handlerequest.go.sh @@ -0,0 +1,54 @@ +#!/usr/bin/env bash +# -*- Mode: Go -*- +requests=$1 +cat < +import "C" + +type NslcdObject interface { + NslcdWrite(fd io.Writer) +} +type NslcdObjectPtr interface { + NslcdRead(fd io.Reader) +} + +func write(fd io.Writer, data interface{}) { + switch data := data.(type) { + // basic data types + case []byte: + _, err := fd.Write(data) + if err != nil { + panic(err) + } + case int32: + err := binary.Write(fd, binary.BigEndian, data) + if err != nil { + panic(err) + } + case NslcdObject: + data.NslcdWrite(fd) + // composite datatypes + case string: + write(fd, int32(len(data))) + write(fd, []byte(data)) + case []string: + write(fd, int32(len(data))) + for _, item := range data { + write(fd, item) + } + case net.IP: + var af int32 = -1 + switch len(data) { + case net.IPv4len: + af = C.AF_INET + case net.IPv6len: + af = C.AF_INET6 + } + var bytes []byte + if af < 0 { + bytes = make([]byte, 0) + } else { + bytes = data + } + write(fd, af) + write(fd, int32(len(bytes))) + write(fd, bytes) + case []net.IP: + write(fd, int32(len(data))) + for _, item := range data { + write(fd, item) + } + default: + v := reflect.ValueOf(data) + switch v.Kind() { + case reflect.Struct: + for i, n := 0, v.NumField(); i < n; i++ { + write(fd, v.Field(i).Interface()) + } + default: + panic("Invalid structure for NSLCD protocol data") + } + } + panic("not reached") +} + +func read(fd io.Reader, data interface{}) { + switch data := data.(type) { + // basic data types + case *[]byte: + _, err := fd.Read(*data) + if err != nil { + panic(err) + } + case *int32: + err := binary.Read(fd, binary.BigEndian, data) + if err != nil { + panic(err) + } + case NslcdObjectPtr: + data.NslcdRead(fd) + // composite datatypes + case *string: + var len int32 + read(fd, &len) + buf := make([]byte, len) + read(fd, &buf) + *data = string(buf) + case *[]string: + var num int32 + read(fd, &num) + *data = make([]string, num) + for i := 0; i < int(num); i++ { + read(fd, &((*data)[i])) + } + case *net.IP: + var af int32 + read(fd, &af) + var _len int32 + switch af { + case C.AF_INET: + _len = net.IPv4len + case C.AF_INET6: + _len = net.IPv6len + default: + panic(NslcdError(fmt.Sprintf("incorrect address family specified: %d", af))) + } + var len int32 + read(fd, &len) + if len != _len { + panic(NslcdError(fmt.Sprintf("address length incorrect: %d", len))) + } + buf := make([]byte, len) + read(fd, &buf) + *data = buf + case *[]net.IP: + var num int32 + read(fd, &num) + *data = make([]net.IP, num) + for i := 0; i < int(num); i++ { + read(fd, &((*data)[i])) + } + default: + v := reflect.ValueOf(data) + switch v.Kind() { + case reflect.Struct: + for i, n := 0, v.NumField(); i < n; i++ { + read(fd, v.Field(i).Interface()) + } + default: + panic("Invalid structure for NSLCD protocol data") + } + } + panic("not reached") +} diff --git a/src/nslcd_proto/nslcd_h.go b/src/nslcd_proto/nslcd_h.go new file mode 100644 index 0000000..56c1316 --- /dev/null +++ b/src/nslcd_proto/nslcd_h.go @@ -0,0 +1,449 @@ +// This file is based heavily on nslcd.h from nss-pam-ldapd +/* + nslcd.h - file describing client/server protocol + + Copyright (C) 2006 West Consulting + Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012, 2013 Arthur de Jong + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + 02110-1301 USA +*/ + +package nslcd_proto + +import ( + "fmt" + "io" + "net" +) + +type void struct{} + +/* + The protocol used between the nslcd client and server is a simple binary + protocol. It is request/response based where the client initiates a + connection, does a single request and closes the connection again. Any + mangled or not understood messages will be silently ignored by the server. + + A request looks like: + INT32 NSLCD_VERSION + INT32 NSLCD_ACTION_* + [request parameters if any] + A response looks like: + INT32 NSLCD_VERSION + INT32 NSLCD_ACTION_* (the original request type) + [result(s)] + INT32 NSLCD_RESULT_END + A single result entry looks like: + NSLCD_RESULT_BEGIN int32 + [result value(s)] + If a response would return multiple values (e.g. for NSLCD_ACTION_*_ALL + functions) each return value will be preceded by a NSLCD_RESULT_BEGIN + value. After the last returned result the server sends + NSLCD_RESULT_END. If some error occurs (e.g. LDAP server unavailable, + error in the request, etc) the server terminates the connection to signal + an error condition (breaking the protocol). + + These are the available basic data types: + INT32 - 32-bit integer value + TYPE - a typed field that is transferred using sizeof() + STRING - a string length (32bit) followed by the string value (not + null-terminted) the string itself is assumed to be UTF-8 + STRINGLIST - a 32-bit number noting the number of strings followed by + the strings one at a time + + Furthermore the ADDRESS compound data type is defined as: + INT32 type of address: e.g. AF_INET or AF_INET6 + INT32 lenght of address + RAW the address itself + With the ADDRESSLIST using the same construct as with STRINGLIST. + + The protocol uses network byte order for all types. +*/ +// These basic data types are implemented in `io.go` + +/* The current version of the protocol. This protocol should only be + updated with major backwards-incompatible changes. */ +const NSLCD_VERSION int32 = 0x00000002 + +/* Get a NSLCD configuration option. There is one request parameter: */ +type Request_Config_Get struct { + Key int32 +} +/* the result value is: */ +type Config struct { + Value string /* interpretation depending on request */ +} +const NSLCD_ACTION_CONFIG_GET int32 = 0x00010001 + +const ( + /* return the message, if any, that is presented to the user when password + modification through PAM is prohibited */ + NSLCD_CONFIG_PAM_PASSWORD_PROHIBIT_MESSAGE int32 = 1 +) + +/* Email alias (/etc/aliases) NSS requests. The result values for a + single entry are: */ +type Alias struct { + Name string + Recipients []string +} +const NSLCD_ACTION_ALIAS_BYNAME int32 = 0x00020001; type Request_Alias_ByName string +const NSLCD_ACTION_ALIAS_ALL int32 = 0x00020008; type Request_Alias_All void + +/* Ethernet address/name mapping NSS requests. The result values for a + single entry are: */ +type Ether struct { + Name string + Address [6]byte +} +const NSLCD_ACTION_ETHER_BYNAME int32 = 0x00030001; type Request_Ether_ByName string +const NSLCD_ACTION_ETHER_BYETHER int32 = 0x00030002; type Request_Ether_ByEther [6]byte +const NSLCD_ACTION_ETHER_ALL int32 = 0x00030008; type Request_Ether_All void + +/* Group and group membership related NSS requests. The result values + for a single entry are: */ +type Group struct { + Name string + Password string + ID int32 + Members []string +} +/* (note that the BYMEMER call returns an emtpy members list) */ +const NSLCD_ACTION_GROUP_BYNAME int32 = 0x00040001; type Request_Group_ByName string +const NSLCD_ACTION_GROUP_BYGID int32 = 0x00040002; type Request_Group_ByGid int32 +const NSLCD_ACTION_GROUP_BYMEMBER int32 = 0x00040006; type Request_Group_ByMember string +const NSLCD_ACTION_GROUP_ALL int32 = 0x00040008; type Request_Group_All void + +/* Hostname (/etc/hosts) lookup NSS requests. The result values + for an entry are: */ +type Host struct { + Name string + Aliases []string + Addresses []net.IP +} +const NSLCD_ACTION_HOST_BYNAME int32 = 0x00050001; type Request_Host_ByName string +const NSLCD_ACTION_HOST_BYADDR int32 = 0x00050002; type Request_Host_ByAddr net.IP +const NSLCD_ACTION_HOST_ALL int32 = 0x00050008; type Request_Host_All void + +/* Netgroup NSS result entries contain a number of parts. A result entry + starts with: + STRING netgroup name + followed by zero or more references to other netgroups or netgroup + triples. A reference to another netgroup looks like: + INT32 NSLCD_NETGROUP_TYPE_NETGROUP + STRING other netgroup name + A a netgroup triple looks like: + INT32 NSLCD_NETGROUP_TYPE_TRIPLE + STRING host + STRING user + STRING domain + A netgroup result entry is terminated by: + INT32 NSLCD_NETGROUP_TYPE_END + */ +type Netgroup_Netgroup struct { + Name string +} +type Netgroup_Triple struct { + Host string + User string + Domain string +} +type Netgroup_PartList []interface{} +func (data Netgroup_PartList) NslcdWrite(fd io.Writer) { + for _, part := range data { + var t int32 = -1 + switch part.(type) { + case Netgroup_Netgroup: t = NSLCD_NETGROUP_TYPE_NETGROUP + case Netgroup_Triple: t = NSLCD_NETGROUP_TYPE_TRIPLE + } + if t < 0 { + panic("unrecognized netgroup type") + } + write(fd, t) + write(fd, part) + } + write(fd, NSLCD_NETGROUP_TYPE_END) +} +func (data *Netgroup_PartList) NslcdRead(fd io.Reader) { + *data = make([]interface{}, 0) + for { + var t int32 + var v interface{} + read(fd, &t) + switch t { + case NSLCD_NETGROUP_TYPE_NETGROUP: + v = Netgroup_Netgroup{} + case NSLCD_NETGROUP_TYPE_TRIPLE: + v = Netgroup_Triple{} + case NSLCD_NETGROUP_TYPE_END: + return + default: + panic(NslcdError(fmt.Sprintf("unrecognized netgroup type: %#08x", t))) + } + read(fd, &v) + *data = append(*data, v) + } +} +var _ NslcdObject = Netgroup_PartList{} +var _ NslcdObjectPtr = &Netgroup_PartList{} +type Netgroup struct { + Name string + Parts Netgroup_PartList +} +const NSLCD_ACTION_NETGROUP_BYNAME int32 = 0x00060001; type Request_Netgroup_ByName string +const NSLCD_ACTION_NETGROUP_ALL int32 = 0x00060008; type Request_Netgroup_All void +const ( + NSLCD_NETGROUP_TYPE_NETGROUP int32 = 1 + NSLCD_NETGROUP_TYPE_TRIPLE int32 = 2 + NSLCD_NETGROUP_TYPE_END int32 = 3 +) + +/* Network name (/etc/networks) NSS requests. Result values for a single + entry are: */ +type Network struct { + Name string + Aliases []string + Addresses []net.IP +} +const NSLCD_ACTION_NETWORK_BYNAME int32 = 0x00070001; type Request_Network_ByName string +const NSLCD_ACTION_NETWORK_BYADDR int32 = 0x00070002; type Request_Network_ByAddr net.IP +const NSLCD_ACTION_NETWORK_ALL int32 = 0x00070008; type Request_Network_All void + +/* User account (/etc/passwd) NSS requests. Result values are: */ +type Passwd struct { + Name string + Password string + UID int32 + GID int32 + GECOS string + HomeDir string + Shell string +} +const NSLCD_ACTION_PASSWD_BYNAME int32 = 0x00080001; type Request_Passwd_ByName string +const NSLCD_ACTION_PASSWD_BYUID int32 = 0x00080002; type Request_Passwd_ByUID int32 +const NSLCD_ACTION_PASSWD_ALL int32 = 0x00080008; type Request_Passwd_All void + +/* Protocol information requests. Result values are: */ +type Protocol struct { + Name string + Aliases []string + Number int32 +} +const NSLCD_ACTION_PROTOCOL_BYNAME int32 = 0x00090001; type Request_Protocol_ByName string +const NSLCD_ACTION_PROTOCOL_BYNUMBER int32 = 0x00090002; type Request_Protocol_ByNumber int32 +const NSLCD_ACTION_PROTOCOL_ALL int32 = 0x00090008; type Request_Protocol_All void + +/* RPC information requests. Result values are: */ +type RPC struct { + Name string + Aliases []string + Number int32 +} +const NSLCD_ACTION_RPC_BYNAME int32 = 0x000a0001; type Request_RPC_ByName string +const NSLCD_ACTION_RPC_BYNUMBER int32 = 0x000a0002; type Request_RPC_ByNumber int32 +const NSLCD_ACTION_RPC_ALL int32 = 0x000a0008; type Request_RPC_All void + +/* Service (/etc/services) information requests. The BYNAME and BYNUMBER + requests contain an extra protocol string in the request which, if not + blank, will filter the services by this protocol. Result values are: */ +type Service struct { + Name string + Aliases []string + PortNumber int32 + Protocol string +} +const NSLCD_ACTION_SERVICE_BYNAME int32 = 0x000b0001; type Request_Service_ByName string +const NSLCD_ACTION_SERVICE_BYNUMBER int32 = 0x000b0002; type Request_Service_ByNumber int32 +const NSLCD_ACTION_SERVICE_ALL int32 = 0x000b0008; type Request_Service_All void + +/* Extended user account (/etc/shadow) information requests. Result + values for a single entry are: */ +type Shadow struct { + Name string + Password string + LastChangeDate int32 + MinDays int32 + MaxDays int32 + WarnDays int32 + InactDays int32 + ExpireDate int32 + Flag int32 +} +const NSLCD_ACTION_SHADOW_BYNAME int32 = 0x000c0001; type Request_Shadow_ByName string +const NSLCD_ACTION_SHADOW_ALL int32 = 0x000c0008; type Request_Shadow_All void + +/* PAM-related requests. The request parameters for all these requests + begin with: */ +type PAM_Base struct { + UserName string + ServiceName string + RUser string + RHost string + TTY string +} +/* If the user is not known in LDAP no result may be returned (immediately + return NSLCD_RESULT_END instead of a PAM error code). */ + +/* PAM authentication check request. The extra request values are: */ +type Request_PAM_Authentication struct { + Base PAM_Base + Password string +} +/* and the result value consists of: */ +type PAM_Authentication struct { + AuthenticationResult int32 + UserName string + AuthorizationResult int32 + AuthorizationError string +} +/* If the username is empty in this request an attempt is made to + authenticate as the administrator (set using rootpwmoddn). + Some authorisation checks are already done during authentication so the + response also includes authorisation information. */ +const NSLCD_ACTION_PAM_AUTHENTICATION int32 = 0x000d0001 + +/* PAM authorisation check request. The result value consists of: */ +type PAM_Authorization struct { + Result int32 + Error string +} +/* The authentication check may have already returned some authorisation + information. The authorisation error message, if supplied, will be used + by the PAM module instead of a message that is generated by the PAM + module itself. */ +const NSLCD_ACTION_PAM_AUTHORIZATION int32 = 0x000d0002; type Request_PAM_Authorization void + +/* PAM session open request. The result value consists of: */ +type PAM_SessionOpen struct { + SessionID string +} +/* This session id may be used to close this session with. */ +const NSLCD_ACTION_PAM_SESSIONOPEN int32 = 0x000d0003; type Request_PAM_SessionOpen void + +/* PAM session close request. This request has the following + extra request value: */ +type Request_PAM_SessionClose struct { + SessionID string +} +/* and this calls only returns an empty response value. */ +type PAM_SessionClose void +const NSLCD_ACTION_PAM_SESSIONCLOSE int32 = 0x000d0004 + +/* PAM password modification request. This requests has the following extra + request values: */ +type Request_PAM_PwMod struct { + AsRoot int32 /* 0=oldpasswd is user passwd, 1=oldpasswd is root passwd */ + OldPassword string + NewPassword string +} +/* and returns the result values: */ +type PAM_PwMod struct { + Result int32 + Error string +} +const NSLCD_ACTION_PAM_PWMOD int32 = 0x000d0005 + +/* User information change request. This request allows one to change + their full name and other information. The request parameters for this + request are: + STRING user name + INT32 asroot: 0=passwd is user passwd, 1=passwd is root passwd + STRING password + followed by one or more of the below, terminated by NSLCD_USERMOD_END + INT32 NSLCD_USERMOD_* + STRING new value + the response consists of one or more of the entries below, terminated + by NSLCD_USERMOD_END: + INT32 NSLCD_USERMOD_* + STRING response + (if the response is blank, the change went OK, otherwise the string + contains an error message) + */ +type UserMod_Item struct { + Key int32 + Value string +} +type UserMod_ItemList []UserMod_Item +func (data UserMod_ItemList) NslcdWrite(fd io.Writer) { + for _, item := range data { + write(fd, item) + } + write(fd, NSLCD_USERMOD_END) +} +func (data *UserMod_ItemList) NslcdRead(fd io.Reader) { + *data = make([]UserMod_Item, 0) + for { + var t int32 + read(fd, &t) + if t == NSLCD_USERMOD_END { + return + } + var v UserMod_Item + read(fd, &v) + *data = append(*data, v) + } +} +var _ NslcdObject = UserMod_ItemList{} +var _ NslcdObjectPtr = &UserMod_ItemList{} +type Request_UserMod struct { + UserName string + AsRoot int32 + Password string + Items UserMod_ItemList +} +type UserMod struct { + Items []UserMod_Item +} +const NSLCD_ACTION_USERMOD int32 = 0x000e0001 + +/* These are the possible values for the NSLCD_ACTION_USERMOD operation + above. */ +const ( + NSLCD_USERMOD_END int32 = 0 /* end of change values */ + NSLCD_USERMOD_RESULT int32 = 1 /* global result value */ + NSLCD_USERMOD_FULLNAME int32 = 2 /* full name */ + NSLCD_USERMOD_ROOMNUMBER int32 = 3 /* room number */ + NSLCD_USERMOD_WORKPHONE int32 = 4 /* office phone number */ + NSLCD_USERMOD_HOMEPHONE int32 = 5 /* home phone number */ + NSLCD_USERMOD_OTHER int32 = 6 /* other info */ + NSLCD_USERMOD_HOMEDIR int32 = 7 /* home directory */ + NSLCD_USERMOD_SHELL int32 = 8 /* login shell */ +) + +/* Request result codes. */ +const ( + NSLCD_RESULT_BEGIN int32 = 1 + NSLCD_RESULT_END int32 = 2 +) + +/* Partial list of PAM result codes. */ +const ( + NSLCD_PAM_SUCCESS int32 = 0 /* everything ok */ + NSLCD_PAM_PERM_DENIED int32 = 6 /* Permission denied */ + NSLCD_PAM_AUTH_ERR int32 = 7 /* Authc failure */ + NSLCD_PAM_CRED_INSUFFICIENT int32 = 8 /* Cannot access authc data */ + NSLCD_PAM_AUTHINFO_UNAVAIL int32 = 9 /* Cannot retrieve authc info */ + NSLCD_PAM_USER_UNKNOWN int32 = 10 /* User not known */ + NSLCD_PAM_MAXTRIES int32 = 11 /* Retry limit reached */ + NSLCD_PAM_NEW_AUTHTOK_REQD int32 = 12 /* Password expired */ + NSLCD_PAM_ACCT_EXPIRED int32 = 13 /* Account expired */ + NSLCD_PAM_SESSION_ERR int32 = 14 /* Cannot make/remove session record */ + NSLCD_PAM_AUTHTOK_ERR int32 = 20 /* Authentication token manipulation error */ + NSLCD_PAM_AUTHTOK_DISABLE_AGING int32 = 23 /* Password aging disabled */ + NSLCD_PAM_IGNORE int32 = 25 /* Ignore module */ + NSLCD_PAM_ABORT int32 = 26 /* Fatal error */ + NSLCD_PAM_AUTHTOK_EXPIRED int32 = 27 /* authentication token has expired */ +) diff --git a/src/nslcd_proto/struct_backend.go.sh b/src/nslcd_proto/struct_backend.go.sh new file mode 100755 index 0000000..792ae84 --- /dev/null +++ b/src/nslcd_proto/struct_backend.go.sh @@ -0,0 +1,10 @@ +#!/usr/bin/env bash +requests=$1 +cat <