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Make early protocol auth mechanism generic, and add SRP

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Adds everything needed for SRP (and everything works too),
but still deactivated, as protocol v25 init packets aren't final yet.
Can be activated by changing the LATEST_PROTOCOL_VERSION header to 25
inside networkprotocol.h.
This commit is contained in:
est31 2015-04-12 04:49:13 +02:00
parent 181f7baa45
commit 82e35edff5
25 changed files with 3351 additions and 309 deletions
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4
build/android/jni/Android.mk
View File

@ -208,6 +208,7 @@ LOCAL_SRC_FILES := \
jni/src/version.cpp \
jni/src/voxel.cpp \
jni/src/voxelalgorithms.cpp \
jni/src/util/auth.cpp \
jni/src/util/base64.cpp \
jni/src/util/directiontables.cpp \
jni/src/util/numeric.cpp \
@ -215,6 +216,7 @@ LOCAL_SRC_FILES := \
jni/src/util/serialize.cpp \
jni/src/util/sha1.cpp \
jni/src/util/string.cpp \
jni/src/util/srp.cpp \
jni/src/util/timetaker.cpp \
jni/src/unittest/test.cpp \
jni/src/unittest/test_collision.cpp \
@ -243,6 +245,8 @@ LOCAL_SRC_FILES := \
jni/src/client/clientlauncher.cpp \
jni/src/client/tile.cpp
# intentionally kept out (we already build openssl itself): jni/src/util/sha256.c
# Network
LOCAL_SRC_FILES += \
jni/src/network/connection.cpp \

114
src/client.cpp
View File

@ -22,10 +22,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include <sstream>
#include <IFileSystem.h>
#include "jthread/jmutexautolock.h"
#include "util/auth.h"
#include "util/directiontables.h"
#include "util/pointedthing.h"
#include "util/serialize.h"
#include "util/string.h"
#include "util/srp.h"
#include "client.h"
#include "network/clientopcodes.h"
#include "filesys.h"
@ -255,6 +257,8 @@ Client::Client(
m_highlighted_pos(0,0,0),
m_map_seed(0),
m_password(password),
m_chosen_auth_mech(AUTH_MECHANISM_NONE),
m_auth_data(NULL),
m_access_denied(false),
m_itemdef_received(false),
m_nodedef_received(false),
@ -404,10 +408,13 @@ void Client::step(float dtime)
memset(pName, 0, PLAYERNAME_SIZE * sizeof(char));
memset(pPassword, 0, PASSWORD_SIZE * sizeof(char));
std::string hashed_password = translatePassword(myplayer->getName(), m_password);
snprintf(pName, PLAYERNAME_SIZE, "%s", myplayer->getName());
snprintf(pPassword, PASSWORD_SIZE, "%s", m_password.c_str());
snprintf(pPassword, PASSWORD_SIZE, "%s", hashed_password.c_str());
sendLegacyInit(pName, pPassword);
if (LATEST_PROTOCOL_VERSION >= 25)
sendInit(myplayer->getName());
}
// Not connected, return
@ -943,6 +950,39 @@ void Client::interact(u8 action, const PointedThing& pointed)
Send(&pkt);
}
void Client::deleteAuthData()
{
if (!m_auth_data)
return;
switch (m_chosen_auth_mech) {
case AUTH_MECHANISM_FIRST_SRP:
break;
case AUTH_MECHANISM_SRP:
case AUTH_MECHANISM_LEGACY_PASSWORD:
srp_user_delete((SRPUser *) m_auth_data);
m_auth_data = NULL;
break;
case AUTH_MECHANISM_NONE:
break;
}
}
AuthMechanism Client::choseAuthMech(const u32 mechs)
{
if (mechs & AUTH_MECHANISM_SRP)
return AUTH_MECHANISM_SRP;
if (mechs & AUTH_MECHANISM_FIRST_SRP)
return AUTH_MECHANISM_FIRST_SRP;
if (mechs & AUTH_MECHANISM_LEGACY_PASSWORD)
return AUTH_MECHANISM_LEGACY_PASSWORD;
return AUTH_MECHANISM_NONE;
}
void Client::sendLegacyInit(const char* playerName, const char* playerPassword)
{
NetworkPacket pkt(TOSERVER_INIT_LEGACY,
@ -956,6 +996,70 @@ void Client::sendLegacyInit(const char* playerName, const char* playerPassword)
Send(&pkt);
}
void Client::sendInit(const std::string &playerName)
{
NetworkPacket pkt(TOSERVER_INIT, 1 + 2 + 2 + (1 + playerName.size()));
// TODO (later) actually send supported compression modes
pkt << (u8) SER_FMT_VER_HIGHEST_READ << (u8) 42;
pkt << (u16) CLIENT_PROTOCOL_VERSION_MIN << (u16) CLIENT_PROTOCOL_VERSION_MAX;
pkt << playerName;
Send(&pkt);
}
void Client::startAuth(AuthMechanism chosen_auth_mechanism)
{
m_chosen_auth_mech = chosen_auth_mechanism;
switch (chosen_auth_mechanism) {
case AUTH_MECHANISM_FIRST_SRP: {
// send srp verifier to server
NetworkPacket resp_pkt(TOSERVER_FIRST_SRP, 0);
char *salt, *bytes_v;
std::size_t len_salt, len_v;
salt = NULL;
getSRPVerifier(getPlayerName(), m_password,
&salt, &len_salt, &bytes_v, &len_v);
resp_pkt
<< std::string((char*)salt, len_salt)
<< std::string((char*)bytes_v, len_v)
<< (u8)((m_password == "") ? 1 : 0);
free(salt);
free(bytes_v);
Send(&resp_pkt);
break;
}
case AUTH_MECHANISM_SRP:
case AUTH_MECHANISM_LEGACY_PASSWORD: {
u8 based_on = 1;
if (chosen_auth_mechanism == AUTH_MECHANISM_LEGACY_PASSWORD) {
m_password = translatePassword(getPlayerName(), m_password);
based_on = 0;
}
std::string playername_u = lowercase(getPlayerName());
m_auth_data = srp_user_new(SRP_SHA256, SRP_NG_2048,
getPlayerName().c_str(), playername_u.c_str(),
(const unsigned char *) m_password.c_str(),
m_password.length(), NULL, NULL);
char *bytes_A = 0;
size_t len_A = 0;
srp_user_start_authentication((struct SRPUser *) m_auth_data,
NULL, NULL, 0, (unsigned char **) &bytes_A, &len_A);
NetworkPacket resp_pkt(TOSERVER_SRP_BYTES_A, 0);
resp_pkt << std::string(bytes_A, len_A) << based_on;
free(bytes_A);
Send(&resp_pkt);
break;
}
case AUTH_MECHANISM_NONE:
break; // not handled in this method
}
}
void Client::sendDeletedBlocks(std::vector<v3s16> &blocks)
{
NetworkPacket pkt(TOSERVER_DELETEDBLOCKS, 1 + sizeof(v3s16) * blocks.size());
@ -1070,6 +1174,12 @@ void Client::sendChangePassword(const std::string &oldpassword,
return;
std::string playername = player->getName();
if (m_proto_ver >= 25) {
// get into sudo mode and then send new password to server
m_password = oldpassword;
m_new_password = newpassword;
startAuth(choseAuthMech(m_sudo_auth_methods));
} else {
std::string oldpwd = translatePassword(playername, oldpassword);
std::string newpwd = translatePassword(playername, newpassword);
@ -1082,9 +1192,9 @@ void Client::sendChangePassword(const std::string &oldpassword,
for (u8 i = 0; i < PASSWORD_SIZE; i++) {
pkt << (u8) (i < newpwd.length() ? newpwd[i] : 0);
}
Send(&pkt);
}
}
void Client::sendDamage(u8 damage)

29
src/client.h
View File

@ -351,6 +351,8 @@ public:
void handleCommand_Deprecated(NetworkPacket* pkt);
void handleCommand_Hello(NetworkPacket* pkt);
void handleCommand_AuthAccept(NetworkPacket* pkt);
void handleCommand_AcceptSudoMode(NetworkPacket* pkt);
void handleCommand_DenySudoMode(NetworkPacket* pkt);
void handleCommand_InitLegacy(NetworkPacket* pkt);
void handleCommand_AccessDenied(NetworkPacket* pkt);
void handleCommand_RemoveNode(NetworkPacket* pkt);
@ -391,6 +393,7 @@ public:
void handleCommand_OverrideDayNightRatio(NetworkPacket* pkt);
void handleCommand_LocalPlayerAnimations(NetworkPacket* pkt);
void handleCommand_EyeOffset(NetworkPacket* pkt);
void handleCommand_SrpBytesSandB(NetworkPacket* pkt);
void ProcessData(NetworkPacket *pkt);
@ -542,11 +545,21 @@ private:
// Send the item number 'item' as player item to the server
void sendPlayerItem(u16 item);
void deleteAuthData();
// helper method shared with clientpackethandler
static AuthMechanism choseAuthMech(const u32 mechs);
void sendLegacyInit(const char* playerName, const char* playerPassword);
void sendInit(const std::string &playerName);
void startAuth(AuthMechanism chosen_auth_mechanism);
void sendDeletedBlocks(std::vector<v3s16> &blocks);
void sendGotBlocks(v3s16 block);
void sendRemovedSounds(std::vector<s32> &soundList);
// Helper function
inline std::string getPlayerName()
{ return m_env.getLocalPlayer()->getName(); }
float m_packetcounter_timer;
float m_connection_reinit_timer;
float m_avg_rtt_timer;
@ -569,6 +582,8 @@ private:
IrrlichtDevice *m_device;
// Server serialization version
u8 m_server_ser_ver;
// Used version of the protocol with server
u8 m_proto_ver;
u16 m_playeritem;
bool m_inventory_updated;
Inventory *m_inventory_from_server;
@ -584,9 +599,23 @@ private:
//s32 m_daynight_i;
//u32 m_daynight_ratio;
std::queue<std::wstring> m_chat_queue;
// The authentication methods we can use to enter sudo mode (=change password)
u32 m_sudo_auth_methods;
// The seed returned by the server in TOCLIENT_INIT is stored here
u64 m_map_seed;
// Auth data
std::string m_playername;
std::string m_password;
// If set, this will be sent (and cleared) upon a TOCLIENT_ACCEPT_SUDO_MODE
std::string m_new_password;
// Usable by auth mechanisms.
AuthMechanism m_chosen_auth_mech;
void * m_auth_data;
bool m_access_denied;
std::string m_access_denied_reason;
std::queue<ClientEvent> m_client_event_queue;

2
src/client/clientlauncher.cpp
View File

@ -392,7 +392,7 @@ bool ClientLauncher::launch_game(std::string &error_message,
else
playername = menudata.name;
password = translatePassword(playername, menudata.password);
password = menudata.password;
g_settings->set("name", playername);

63
src/clientiface.cpp
View File

@ -31,6 +31,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "emerge.h"
#include "serverobject.h" // TODO this is used for cleanup of only
#include "log.h"
#include "util/srp.h"
const char *ClientInterface::statenames[] = {
"Invalid",
@ -427,10 +428,12 @@ void RemoteClient::notifyEvent(ClientStateEvent event)
//intentionally do nothing
break;
case CS_Created:
switch(event)
{
case CSE_Init:
m_state = CS_InitSent;
switch (event) {
case CSE_Hello:
m_state = CS_HelloSent;
break;
case CSE_InitLegacy:
m_state = CS_AwaitingInit2;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
@ -447,7 +450,32 @@ void RemoteClient::notifyEvent(ClientStateEvent event)
case CS_Denied:
/* don't do anything if in denied state */
break;
case CS_InitSent:
case CS_HelloSent:
switch(event)
{
case CSE_AuthAccept:
m_state = CS_AwaitingInit2;
if ((chosen_mech == AUTH_MECHANISM_SRP)
|| (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
srp_verifier_delete((SRPVerifier *) auth_data);
chosen_mech = AUTH_MECHANISM_NONE;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SetDenied:
m_state = CS_Denied;
if ((chosen_mech == AUTH_MECHANISM_SRP)
|| (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
srp_verifier_delete((SRPVerifier *) auth_data);
chosen_mech = AUTH_MECHANISM_NONE;
break;
default:
myerror << "HelloSent: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
}
break;
case CS_AwaitingInit2:
switch(event)
{
case CSE_GotInit2:
@ -514,6 +542,13 @@ void RemoteClient::notifyEvent(ClientStateEvent event)
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SudoSuccess:
m_state = CS_SudoMode;
if ((chosen_mech == AUTH_MECHANISM_SRP)
|| (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
srp_verifier_delete((SRPVerifier *) auth_data);
chosen_mech = AUTH_MECHANISM_NONE;
break;
/* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
default:
myerror << "Active: Invalid client state transition! " << event;
@ -521,6 +556,24 @@ void RemoteClient::notifyEvent(ClientStateEvent event)
break;
}
break;
case CS_SudoMode:
switch(event)
{
case CSE_SetDenied:
m_state = CS_Denied;
break;
case CSE_Disconnect:
m_state = CS_Disconnecting;
break;
case CSE_SudoLeave:
m_state = CS_Active;
break;
default:
myerror << "Active: Invalid client state transition! " << event;
throw ClientStateError(myerror.str());
break;
}
break;
case CS_Disconnecting:
/* we are already disconnecting */
break;

164
src/clientiface.h
View File

@ -47,40 +47,43 @@ class EmergeManager;
| Created |
| |
\-----------------/
|
|
+-----------------------------+ invalid playername, password
|IN: | or denied by mod
| TOSERVER_INIT |------------------------------
+-----------------------------+ |
| |
| Auth ok |
| |
+-----------------------------+ |
|OUT: | |
| TOCLIENT_INIT | |
+-----------------------------+ |
| |
| depending of the incoming packet
+---------------------------------------
v |
/-----------------\ |
| | |
| InitSent | |
| | |
\-----------------/ +------------------
+-----------------------------+ +-----------------------------+
|IN: | |IN: |
| TOSERVER_INIT_LEGACY |----- | TOSERVER_INIT | invalid playername,
+-----------------------------+ | +-----------------------------+ password (for _LEGACY),
| | | or denied by mod
| Auth ok -------------------+---------------------------------
| | |
+-----------------------------+ +-----------------------------+ |
|IN: | |OUT: | |
| TOSERVER_INIT2 | | TOCLIENT_ACCESS_DENIED | |
|OUT: | |OUT: | |
| TOCLIENT_INIT_LEGACY | | TOCLIENT_HELLO | |
+-----------------------------+ +-----------------------------+ |
| | |
| | |
v v |
/-----------------\ /-----------------\ |
| | | | |
| InitDone | | Denied | |
| | | | |
\-----------------/ \-----------------/ |
| |
+-----------------------------+ |
| AwaitingInit2 |<--------- | HelloSent | |
| | | | | |
\-----------------/ | \-----------------/ |
| | | |
+-----------------------------+ | *-----------------------------* Auth fails |
|IN: | | |Authentication, depending on |-----------------+
| TOSERVER_INIT2 | | | packet sent by client | |
+-----------------------------+ | *-----------------------------* |
| | | |
| | | Authentication |
v | | successful |
/-----------------\ | v |
| | | +-----------------------------+ |
| InitDone | | |OUT: | |
| | | | TOCLIENT_AUTH_ACCEPT | |
\-----------------/ | +-----------------------------+ |
| | | |
+-----------------------------+ --------------------- |
|OUT: | |
| TOCLIENT_MOVEMENT | |
| TOCLIENT_ITEMDEF | |
@ -91,7 +94,7 @@ class EmergeManager;
+-----------------------------+ |
| |
| |
| ----------------------------------- |
| ----------------------------- |
v | | |
/-----------------\ v |
| | +-----------------------------+ |
@ -100,43 +103,63 @@ class EmergeManager;
\-----------------/ | TOSERVER_RECEIVED_MEDIA | |
| +-----------------------------+ |
| ^ | |
| ----------------------------------- |
| ----------------------------- |
| |
+-----------------------------+ |
|IN: | |
| TOSERVER_CLIENT_READY | |
+-----------------------------+ |
| async |
v mod action |
+-----------------------------+ (ban,kick) |
|OUT: | |
| TOCLIENT_MOVE_PLAYER | |
| TOCLIENT_PRIVILEGES | |
| TOCLIENT_INVENTORY_FORMSPEC | |
| UpdateCrafting | |
| TOCLIENT_INVENTORY | |
| TOCLIENT_HP (opt) | |
+-----------------------------+ --------------------------------+
|IN: | | |
| TOSERVER_CLIENT_READY | v |
+-----------------------------+ +-------------------------------+ |
| |OUT: | |
v | TOCLIENT_ACCESS_DENIED_LEGAGY | |
+-----------------------------+ +-------------------------------+ |
|OUT: | | |
| TOCLIENT_MOVE_PLAYER | v |
| TOCLIENT_PRIVILEGES | /-----------------\ |
| TOCLIENT_INVENTORY_FORMSPEC | | | |
| UpdateCrafting | | Denied | |
| TOCLIENT_INVENTORY | | | |
| TOCLIENT_HP (opt) | \-----------------/ |
| TOCLIENT_BREATH | |
| TOCLIENT_DEATHSCREEN | |
+-----------------------------+ |
| |
v |
/-----------------\ |
| |------------------------------------------------------
| Active |
| |----------------------------------
\-----------------/ timeout |
| +-----------------------------+
| |OUT: |
| | TOCLIENT_DISCONNECT |
| +-----------------------------+
| |
/-----------------\ async mod action (ban, kick) |
| |---------------------------------------------------------------
---->| Active |
| | |----------------------------------------------
| \-----------------/ timeout |
| | | +-----------------------------+
| | | |OUT: |
| | | | TOCLIENT_DISCONNECT |
| | | +-----------------------------+
| | | |
| | | v
| | +-----------------------------+ /-----------------\
| | |IN: | | |
| | | TOSERVER_DISCONNECT |------------------->| Disconnecting |
| | +-----------------------------+ | |
| | \-----------------/
| | any auth packet which was
| | allowed in TOCLIENT_AUTH_ACCEPT
| v
+-----------------------------+ /-----------------\
|IN: | | |
| TOSERVER_DISCONNECT |------------------->| Disconnecting |
+-----------------------------+ | |
\-----------------/
| *-----------------------------* Auth +-------------------------------+
| |Authentication, depending on | succeeds |OUT: |
| | packet sent by client |---------->| TOCLIENT_ACCEPT_SUDO_MODE |
| *-----------------------------* +-------------------------------+
| | |
| | Auth fails /-----------------\
| v | |
| +-------------------------------+ | SudoMode |
| |OUT: | | |
| | TOCLIENT_DENY_SUDO_MODE | \-----------------/
| +-------------------------------+ |
| | v
| | +-----------------------------+
| | sets password accordingly |IN: |
-------------------+-------------------------------| TOSERVER_FIRST_SRP |
+-----------------------------+
*/
namespace con {
class Connection;
@ -150,19 +173,25 @@ enum ClientState
CS_Disconnecting,
CS_Denied,
CS_Created,
CS_InitSent,
CS_AwaitingInit2,
CS_HelloSent,
CS_InitDone,
CS_DefinitionsSent,
CS_Active
CS_Active,
CS_SudoMode
};
enum ClientStateEvent
{
CSE_Init,
CSE_Hello,
CSE_AuthAccept,
CSE_InitLegacy,
CSE_GotInit2,
CSE_SetDenied,
CSE_SetDefinitionsSent,
CSE_SetClientReady,
CSE_SudoSuccess,
CSE_SudoLeave,
CSE_Disconnect
};
@ -201,10 +230,24 @@ public:
//
u16 net_proto_version;
/* Authentication information */
std::string enc_pwd;
AuthMechanism chosen_mech;
void * auth_data;
u32 allowed_auth_mechs;
u32 allowed_sudo_mechs;
bool isSudoMechAllowed(AuthMechanism mech)
{ return allowed_sudo_mechs & mech; }
bool isMechAllowed(AuthMechanism mech)
{ return allowed_auth_mechs & mech; }
RemoteClient():
peer_id(PEER_ID_INEXISTENT),
serialization_version(SER_FMT_VER_INVALID),
net_proto_version(0),
chosen_mech(AUTH_MECHANISM_NONE),
auth_data(NULL),
m_time_from_building(9999),
m_pending_serialization_version(SER_FMT_VER_INVALID),
m_state(CS_Created),
@ -303,7 +346,6 @@ public:
/* get uptime */
u32 uptime();
/* set version information */
void setVersionInfo(u8 major, u8 minor, u8 patch, std::string full) {
m_version_major = major;

38
src/network/clientopcodes.cpp
View File

@ -28,8 +28,8 @@ const ToClientCommandHandler toClientCommandTable[TOCLIENT_NUM_MSG_TYPES] =
null_command_handler, // 0x01
{ "TOCLIENT_HELLO", TOCLIENT_STATE_NOT_CONNECTED, &Client::handleCommand_Hello }, // 0x02
{ "TOCLIENT_AUTH_ACCEPT", TOCLIENT_STATE_NOT_CONNECTED, &Client::handleCommand_AuthAccept }, // 0x03
null_command_handler, // 0x04
null_command_handler, // 0x05
{ "TOCLIENT_ACCEPT_SUDO_MODE", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_AcceptSudoMode}, // 0x04
{ "TOCLIENT_DENY_SUDO_MODE", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_DenySudoMode}, // 0x05
null_command_handler, // 0x06
null_command_handler, // 0x07
null_command_handler, // 0x08
@ -108,6 +108,19 @@ const ToClientCommandHandler toClientCommandTable[TOCLIENT_NUM_MSG_TYPES] =
{ "TOCLIENT_LOCAL_PLAYER_ANIMATIONS", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_LocalPlayerAnimations }, // 0x51
{ "TOCLIENT_EYE_OFFSET", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_EyeOffset }, // 0x52
{ "TOCLIENT_DELETE_PARTICLESPAWNER", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_DeleteParticleSpawner }, // 0x53
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
null_command_handler,
{ "TOCLIENT_SRP_BYTES_S_B", TOCLIENT_STATE_NOT_CONNECTED, &Client::handleCommand_SrpBytesSandB }, // 0x60
};
const static ServerCommandFactory null_command_factory = { "TOSERVER_NULL", 0, false };
@ -116,7 +129,7 @@ const ServerCommandFactory serverCommandFactoryTable[TOSERVER_NUM_MSG_TYPES] =
{
null_command_factory, // 0x00
null_command_factory, // 0x01
null_command_factory, // 0x02
{ "TOSERVER_INIT", 1, false }, // 0x02
null_command_factory, // 0x03
null_command_factory, // 0x04
null_command_factory, // 0x05
@ -129,7 +142,7 @@ const ServerCommandFactory serverCommandFactoryTable[TOSERVER_NUM_MSG_TYPES] =
null_command_factory, // 0x0c
null_command_factory, // 0x0d
null_command_factory, // 0x0e
{ "TOSERVER_INIT", 1, false }, // 0x0F
null_command_factory, // 0x0F
{ "TOSERVER_INIT_LEGACY", 1, false }, // 0x10
{ "TOSERVER_INIT2", 1, true }, // 0x11
null_command_factory, // 0x12
@ -175,11 +188,26 @@ const ServerCommandFactory serverCommandFactoryTable[TOSERVER_NUM_MSG_TYPES] =
{ "TOSERVER_REMOVED_SOUNDS", 1, true }, // 0x3a
{ "TOSERVER_NODEMETA_FIELDS", 0, true }, // 0x3b
{ "TOSERVER_INVENTORY_FIELDS", 0, true }, // 0x3c
{ "TOSERVER_PASSWORD", 0, true }, // 0x3d
null_command_factory, // 0x3d
null_command_factory, // 0x3e
null_command_factory, // 0x3f
{ "TOSERVER_REQUEST_MEDIA", 1, true }, // 0x40
{ "TOSERVER_RECEIVED_MEDIA", 1, true }, // 0x41
{ "TOSERVER_BREATH", 0, true }, // 0x42
{ "TOSERVER_CLIENT_READY", 0, true }, // 0x43
null_command_factory, // 0x44
null_command_factory, // 0x45
null_command_factory, // 0x46
null_command_factory, // 0x47
null_command_factory, // 0x48
null_command_factory, // 0x49
null_command_factory, // 0x4a
null_command_factory, // 0x4b
null_command_factory, // 0x4c
null_command_factory, // 0x4d
null_command_factory, // 0x4e
null_command_factory, // 0x4f
{ "TOSERVER_FIRST_SRP", 1, true }, // 0x50
{ "TOSERVER_SRP_BYTES_A", 1, true }, // 0x51
{ "TOSERVER_SRP_BYTES_M", 1, true }, // 0x52
};

99
src/network/clientpackethandler.cpp
View File

@ -30,6 +30,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "strfnd.h"
#include "network/clientopcodes.h"
#include "util/serialize.h"
#include "util/srp.h"
void Client::handleCommand_Deprecated(NetworkPacket* pkt)
{
@ -44,10 +45,16 @@ void Client::handleCommand_Hello(NetworkPacket* pkt)
return;
u8 deployed;
*pkt >> deployed;
u32 auth_mechs;
std::string username_legacy; // for case insensitivity
*pkt >> deployed >> auth_mechs >> username_legacy;
// Chose an auth method we support
AuthMechanism chosen_auth_mechanism = choseAuthMech(auth_mechs);
infostream << "Client: TOCLIENT_HELLO received with "
"deployed=" << ((int)deployed & 0xff) << std::endl;
"deployed=" << ((int)deployed & 0xff) << ", auth_mechs="
<< auth_mechs << ", chosen=" << chosen_auth_mechanism << std::endl;
if (!ser_ver_supported(deployed)) {
infostream << "Client: TOCLIENT_HELLO: Server sent "
@ -56,14 +63,43 @@ void Client::handleCommand_Hello(NetworkPacket* pkt)
}
m_server_ser_ver = deployed;
m_proto_ver = deployed;
//TODO verify that username_legacy matches sent username, only
// differs in casing (make both uppercase and compare)
// This is only neccessary though when we actually want to add casing support
if (m_chosen_auth_mech != AUTH_MECHANISM_NONE) {
// we recieved a TOCLIENT_HELLO while auth was already going on
errorstream << "Client: TOCLIENT_HELLO while auth was already going on"
<< "(chosen_mech=" << m_chosen_auth_mech << ")." << std::endl;
if ((m_chosen_auth_mech == AUTH_MECHANISM_SRP)
|| (m_chosen_auth_mech == AUTH_MECHANISM_LEGACY_PASSWORD)) {
srp_user_delete((SRPUser *) m_auth_data);
m_auth_data = 0;
}
}
// Authenticate using that method, or abort if there wasn't any method found
if (chosen_auth_mechanism != AUTH_MECHANISM_NONE) {
startAuth(chosen_auth_mechanism);
} else {
m_chosen_auth_mech = AUTH_MECHANISM_NONE;
m_access_denied = true;
m_access_denied_reason = "Unknown";
m_con.Disconnect();
}
// @ TODO auth to server
}
void Client::handleCommand_AuthAccept(NetworkPacket* pkt)
{
m_chosen_auth_mech = AUTH_MECHANISM_NONE;
deleteAuthData();
v3f playerpos;
*pkt >> playerpos >> m_map_seed >> m_recommended_send_interval;
*pkt >> playerpos >> m_map_seed >> m_recommended_send_interval
>> m_sudo_auth_methods;
playerpos -= v3f(0, BS / 2, 0);
@ -82,7 +118,28 @@ void Client::handleCommand_AuthAccept(NetworkPacket* pkt)
m_state = LC_Init;
}
void Client::handleCommand_AcceptSudoMode(NetworkPacket* pkt)
{
m_chosen_auth_mech = AUTH_MECHANISM_NONE;
deleteAuthData();
m_password = m_new_password;
verbosestream << "Client: Recieved TOCLIENT_ACCEPT_SUDO_MODE." << std::endl;
// send packet to actually set the password
startAuth(AUTH_MECHANISM_FIRST_SRP);
// reset again
m_chosen_auth_mech = AUTH_MECHANISM_NONE;
}
void Client::handleCommand_DenySudoMode(NetworkPacket* pkt)
{
m_chat_queue.push(L"Password change denied. Password NOT changed.");
// reset everything and be sad
deleteAuthData();
m_chosen_auth_mech = AUTH_MECHANISM_NONE;
}
void Client::handleCommand_InitLegacy(NetworkPacket* pkt)
{
if (pkt->getSize() < 1)
@ -101,6 +158,7 @@ void Client::handleCommand_InitLegacy(NetworkPacket* pkt)
}
m_server_ser_ver = deployed;
m_proto_ver = deployed;
// Get player position
v3s16 playerpos_s16(0, BS * 2 + BS * 20, 0);
@ -1105,3 +1163,36 @@ void Client::handleCommand_EyeOffset(NetworkPacket* pkt)
*pkt >> player->eye_offset_first >> player->eye_offset_third;
}
void Client::handleCommand_SrpBytesSandB(NetworkPacket* pkt)
{
if ((m_chosen_auth_mech != AUTH_MECHANISM_LEGACY_PASSWORD)
&& (m_chosen_auth_mech != AUTH_MECHANISM_SRP)) {
errorstream << "Client: Recieved SRP S_B login message,"
<< " but wasn't supposed to (chosen_mech="
<< m_chosen_auth_mech << ")." << std::endl;
return;
}
char *bytes_M = 0;
size_t len_M = 0;
SRPUser *usr = (SRPUser *) m_auth_data;
std::string s;
std::string B;
*pkt >> s >> B;
infostream << "Client: Recieved TOCLIENT_SRP_BYTES_S_B." << std::endl;
srp_user_process_challenge(usr, (const unsigned char *) s.c_str(), s.size(),
(const unsigned char *) B.c_str(), B.size(),
(unsigned char **) &bytes_M, &len_M);
if ( !bytes_M ) {
errorstream << "Client: SRP-6a S_B safety check violation!" << std::endl;
return;
}
NetworkPacket resp_pkt(TOSERVER_SRP_BYTES_M, 0);
resp_pkt << std::string(bytes_M, len_M);
Send(&resp_pkt);
}

4
src/network/networkpacket.h
View File

@ -41,8 +41,10 @@ public:
u16 getPeerId() { return m_peer_id; }
u16 getCommand() { return m_command; }
// Data extractors
// Returns a c-string without copying.
// A better name for this would be getRawString()
char* getString(u32 from_offset);
// major difference to putCString(): doesn't write len into the buffer
void putRawString(const char* src, u32 len);
NetworkPacket& operator>>(std::string& dst);

122
src/network/networkprotocol.h
View File

@ -120,11 +120,15 @@ with this program; if not, write to the Free Software Foundation, Inc.,
permit translation
Add TOCLIENT_DELETE_PARTICLESPAWNER (0x53), fixing the u16 read and
reading u32
Add TOSERVER_INIT new opcode (0x02) for client presentation to server
Add TOSERVER_AUTH new opcode (0x03) for client authentication
Add new opcode TOSERVER_INIT for client presentation to server
Add new opcodes TOSERVER_FIRST_SRP, TOSERVER_SRP_BYTES_A,
TOSERVER_SRP_BYTES_M, TOCLIENT_SRP_BYTES_S_B
for the three supported auth mechanisms around srp
Add new opcodes TOCLIENT_ACCEPT_SUDO_MODE and TOCLIENT_DENY_SUDO_MODE
for sudo mode handling (auth mech generic way of changing password).
Add TOCLIENT_HELLO for presenting server to client after client
presentation
Add TOCLIENT_AUTH_ACCEPT to accept connexion from client
Add TOCLIENT_AUTH_ACCEPT to accept connection from client
*/
#define LATEST_PROTOCOL_VERSION 24
@ -151,14 +155,31 @@ with this program; if not, write to the Free Software Foundation, Inc.,
enum ToClientCommand
{
TOCLIENT_HELLO = 0x02,
TOCLIENT_AUTH_ACCEPT = 0x03,
TOCLIENT_ACCESS_DENIED = 0x0A,
/*
u16 command
u16 reason_length
wstring reason
*/
Sent after TOSERVER_INIT.
u8 deployed version
u32 supported auth methods
std::string username that should be used for legacy hash (for proper casing)
*/
TOCLIENT_AUTH_ACCEPT = 0x03,
/*
Message from server to accept auth.
v3s16 player's position + v3f(0,BS/2,0) floatToInt'd
u64 map seed
f1000 recommended send interval
u32 : supported auth methods for sudo mode
(where the user can change their password)
*/
TOCLIENT_ACCEPT_SUDO_MODE = 0x04,
/*
Sent to client to show it is in sudo mode now.
*/
TOCLIENT_DENY_SUDO_MODE = 0x05,
/*
Signals client that sudo mode auth failed.
*/
TOCLIENT_INIT_LEGACY = 0x10,
/*
Server's reply to TOSERVER_INIT.
@ -173,7 +194,11 @@ enum ToClientCommand
NOTE: The position in here is deprecated; position is
explicitly sent afterwards
*/
TOCLIENT_ACCESS_DENIED = 0x0A,
/*
u8 reason
std::string custom reason (if reason == SERVER_ACCESSDENIED_CUSTOM_STRING)
*/
TOCLIENT_BLOCKDATA = 0x20, //TODO: Multiple blocks
TOCLIENT_ADDNODE = 0x21,
/*
@ -589,7 +614,16 @@ enum ToClientCommand
u32 id
*/
TOCLIENT_NUM_MSG_TYPES = 0x54,
TOCLIENT_SRP_BYTES_S_B = 0x60,
/*
Belonging to AUTH_MECHANISM_LEGACY_PASSWORD and AUTH_MECHANISM_SRP.
u16 command
std::string bytes_s
std::string bytes_B
*/
TOCLIENT_NUM_MSG_TYPES = 0x61,
};
enum ToServerCommand
@ -598,18 +632,11 @@ enum ToServerCommand
/*
Sent first after connected.
[0] u16 TOSERVER_INIT
[2] u8 SER_FMT_VER_HIGHEST_READ
[3] u8 compression_modes
*/
TOSERVER_AUTH = 0x03,
/*
Sent first after presentation (INIT).
[0] std::string player_name
[0+*] std::string password (new in some version)
[0+*+*] u16 minimum supported network protocol version (added sometime)
[0+*+*+2] u16 maximum supported network protocol version (added later than the previous one)
[4] u16 minimum supported network protocol version
[6] u16 maximum supported network protocol version
[8] std::string player name
*/
TOSERVER_INIT_LEGACY = 0x10,
@ -817,15 +844,6 @@ enum ToServerCommand
u8[len] field value
*/
TOSERVER_PASSWORD = 0x3d,
/*
Sent to change password.
[0] u16 TOSERVER_PASSWORD
[2] std::string old password
[2+*] std::string new password
*/
TOSERVER_REQUEST_MEDIA = 0x40,
/*
u16 command
@ -857,7 +875,49 @@ enum ToServerCommand
u8[len] full_version_string
*/
TOSERVER_NUM_MSG_TYPES = 0x44,
TOSERVER_FIRST_SRP = 0x50,
/*
Belonging to AUTH_MECHANISM_FIRST_SRP.
std::string srp salt
std::string srp verification key
u8 is_empty (=1 if password is empty, 0 otherwise)
*/
TOSERVER_SRP_BYTES_A = 0x51,
/*
Belonging to AUTH_MECHANISM_LEGACY_PASSWORD and AUTH_MECHANISM_SRP,
depending on current_login_based_on.
std::string bytes_A
u8 current_login_based_on : on which version of the password's
hash this login is based on (0 legacy hash,
or 1 directly the password)
*/
TOSERVER_SRP_BYTES_M = 0x52,
/*
Belonging to AUTH_MECHANISM_LEGACY_PASSWORD and AUTH_MECHANISM_SRP.
std::string bytes_M
*/
TOSERVER_NUM_MSG_TYPES = 0x53,
};
enum AuthMechanism
{
// reserved
AUTH_MECHANISM_NONE = 0,
// SRP based on the legacy hash
AUTH_MECHANISM_LEGACY_PASSWORD = 1 << 0,
// SRP based on the srp verification key
AUTH_MECHANISM_SRP = 1 << 1,
// Establishes a srp verification key, for first login and password changing
AUTH_MECHANISM_FIRST_SRP = 1 << 2,
};
enum AccessDeniedCode {

38
src/network/serveropcodes.cpp
View File

@ -27,7 +27,7 @@ const ToServerCommandHandler toServerCommandTable[TOSERVER_NUM_MSG_TYPES] =
null_command_handler, // 0x00 (never use this)
null_command_handler, // 0x01
{ "TOSERVER_INIT", TOSERVER_STATE_NOT_CONNECTED, &Server::handleCommand_Init }, // 0x02
{ "TOSERVER_AUTH", TOSERVER_STATE_NOT_CONNECTED, &Server::handleCommand_Auth }, // 0x03
null_command_handler, // 0x03
null_command_handler, // 0x04
null_command_handler, // 0x05
null_command_handler, // 0x06
@ -85,13 +85,28 @@ const ToServerCommandHandler toServerCommandTable[TOSERVER_NUM_MSG_TYPES] =
{ "TOSERVER_REMOVED_SOUNDS", TOSERVER_STATE_INGAME, &Server::handleCommand_RemovedSounds }, // 0x3a
{ "TOSERVER_NODEMETA_FIELDS", TOSERVER_STATE_INGAME, &Server::handleCommand_NodeMetaFields }, // 0x3b
{ "TOSERVER_INVENTORY_FIELDS", TOSERVER_STATE_INGAME, &Server::handleCommand_InventoryFields }, // 0x3c
{ "TOSERVER_PASSWORD", TOSERVER_STATE_INGAME, &Server::handleCommand_Password }, // 0x3d
null_command_handler, // 0x3d
null_command_handler, // 0x3e
null_command_handler, // 0x3f
{ "TOSERVER_REQUEST_MEDIA", TOSERVER_STATE_STARTUP, &Server::handleCommand_RequestMedia }, // 0x40
{ "TOSERVER_RECEIVED_MEDIA", TOSERVER_STATE_STARTUP, &Server::handleCommand_ReceivedMedia }, // 0x41
{ "TOSERVER_BREATH", TOSERVER_STATE_INGAME, &Server::handleCommand_Breath }, // 0x42
{ "TOSERVER_CLIENT_READY", TOSERVER_STATE_STARTUP, &Server::handleCommand_ClientReady }, // 0x43
null_command_handler, // 0x44
null_command_handler, // 0x45
null_command_handler, // 0x46
null_command_handler, // 0x47
null_command_handler, // 0x48
null_command_handler, // 0x49
null_command_handler, // 0x4a
null_command_handler, // 0x4b
null_command_handler, // 0x4c
null_command_handler, // 0x4d
null_command_handler, // 0x4e
null_command_handler, // 0x4f
{ "TOSERVER_FIRST_SRP", TOSERVER_STATE_NOT_CONNECTED, &Server::handleCommand_FirstSrp }, // 0x50
{ "TOSERVER_SRP_BYTES_A", TOSERVER_STATE_NOT_CONNECTED, &Server::handleCommand_SrpBytesA }, // 0x51
{ "TOSERVER_SRP_BYTES_M", TOSERVER_STATE_NOT_CONNECTED, &Server::handleCommand_SrpBytesM }, // 0x52
};
const static ClientCommandFactory null_command_factory = { "TOCLIENT_NULL", 0, false };
@ -100,10 +115,10 @@ const ClientCommandFactory clientCommandFactoryTable[TOCLIENT_NUM_MSG_TYPES] =
{
null_command_factory, // 0x00
null_command_factory, // 0x01
{ "TOCLIENT_HELLO", 0, true }, // 0x02
null_command_factory, // 0x02
{ "TOCLIENT_AUTH_ACCEPT", 0, true }, // 0x03
null_command_factory, // 0x04
null_command_factory, // 0x05
{ "TOCLIENT_ACCEPT_SUDO_MODE", 0, true }, // 0x04
{ "TOCLIENT_DENY_SUDO_MODE", 0, true }, // 0x05
null_command_factory, // 0x06
null_command_factory, // 0x07
null_command_factory, // 0x08
@ -182,4 +197,17 @@ const ClientCommandFactory clientCommandFactoryTable[TOCLIENT_NUM_MSG_TYPES] =
{ "TOCLIENT_LOCAL_PLAYER_ANIMATIONS", 0, true }, // 0x51
{ "TOCLIENT_EYE_OFFSET", 0, true }, // 0x52
{ "TOCLIENT_DELETE_PARTICLESPAWNER", 0, true }, // 0x53
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
null_command_factory,
{ "TOSERVER_SRP_BYTES_S_B", 0, true }, // 0x60
};

436
src/network/serverpackethandler.cpp
View File

@ -32,9 +32,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "version.h"
#include "network/networkprotocol.h"
#include "network/serveropcodes.h"
#include "util/auth.h"
#include "util/base64.h"
#include "util/pointedthing.h"
#include "util/serialize.h"
#include "util/srp.h"
void Server::handleCommand_Deprecated(NetworkPacket* pkt)
{
@ -92,13 +94,14 @@ void Server::handleCommand_Init(NetworkPacket* pkt)
u8 compression_modes;
u16 min_net_proto_version = 0;
u16 max_net_proto_version;
std::string playerName;
*pkt >> client_max >> compression_modes >> min_net_proto_version
>> max_net_proto_version;
>> max_net_proto_version >> playerName;
u8 our_max = SER_FMT_VER_HIGHEST_READ;
// Use the highest version supported by both
int deployed = std::min(client_max, our_max);
u8 deployed = std::min(client_max, our_max);
// If it's lower than the lowest supported, give up.
if (deployed < SER_FMT_VER_LOWEST)
deployed = SER_FMT_VER_INVALID;
@ -137,7 +140,7 @@ void Server::handleCommand_Init(NetworkPacket* pkt)
client->net_proto_version = net_proto_version;
// On this handler protocol version 25 is required
// On this handler at least protocol version 25 is required
if (net_proto_version < 25 ||
net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
@ -156,36 +159,9 @@ void Server::handleCommand_Init(NetworkPacket* pkt)
}
}
// @TODO: check if we support same modes, but not required now
client->setSupportedCompressionModes(compression_modes);
m_clients.event(pkt->getPeerId(), CSE_Init);
}
void Server::handleCommand_Auth(NetworkPacket* pkt)
{
std::string addr_s;
try {
Address address = getPeerAddress(pkt->getPeerId());
addr_s = address.serializeString();
}
catch (con::PeerNotFoundException &e) {
/*
* no peer for this packet found
* most common reason is peer timeout, e.g. peer didn't
* respond for some time, your server was overloaded or
* things like that.
Validate player name
*/
infostream << "Server::ProcessData(): Canceling: peer "
<< pkt->getPeerId() << " not found" << std::endl;
return;
}
std::string playerName, playerPassword;
*pkt >> playerName >> playerPassword;
const char* playername = playerName.c_str();
if (playerName.size() > PLAYERNAME_SIZE) {
@ -202,6 +178,11 @@ void Server::handleCommand_Auth(NetworkPacket* pkt)
return;
}
m_clients.setPlayerName(pkt->getPeerId(), playername);
//TODO (later) case insensitivity
std::string legacyPlayerNameCasing = playerName;
if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) {
actionstream << "Server: Player with the name \"singleplayer\" "
<< "tried to connect from " << addr_s << std::endl;
@ -222,23 +203,9 @@ void Server::handleCommand_Auth(NetworkPacket* pkt)
}
}
if (playerPassword.size() > PASSWORD_SIZE) {
actionstream << "Server: Player with an too long password "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
return;
}
infostream << "Server: New connection: \"" << playerName << "\" from "
<< addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
if(!base64_is_valid(playerPassword)){
actionstream << "Server: " << playerName
<< " supplied invalid password hash" << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
return;
}
// Enforce user limit.
// Don't enforce for users that have some admin right
if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
@ -247,76 +214,74 @@ void Server::handleCommand_Auth(NetworkPacket* pkt)
!checkPriv(playername, "privs") &&
!checkPriv(playername, "password") &&
playername != g_settings->get("name")) {
actionstream << "Server: " << playername << " tried to join, but there"
<< " are already max_users="
actionstream << "Server: " << playername << " tried to join from "
<< addr_s << ", but there" << " are already max_users="
<< g_settings->getU16("max_users") << " players." << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_TOO_MANY_USERS);
return;
}
std::string checkpwd; // Password hash to check against
bool has_auth = m_script->getAuth(playername, &checkpwd, NULL);
/*
Compose auth methods for answer
*/
std::string encpwd; // encrypted Password field for the user
bool has_auth = m_script->getAuth(playername, &encpwd, NULL);
u32 auth_mechs = 0;
// If no authentication info exists for user, create it
if (!has_auth) {
if (!isSingleplayer() &&
g_settings->getBool("disallow_empty_password") &&
playerPassword.empty()) {
actionstream << "Server: " << playerName
<< " supplied empty password" << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_EMPTY_PASSWORD);
return;
}
std::string raw_default_password =
g_settings->get("default_password");
std::string initial_password =
translatePassword(playername, raw_default_password);
client->chosen_mech = AUTH_MECHANISM_NONE;
// If default_password is empty, allow any initial password
if (raw_default_password.length() == 0)
initial_password = playerPassword.c_str();
m_script->createAuth(playername, initial_password);
}
has_auth = m_script->getAuth(playername, &checkpwd, NULL);
if(!has_auth) {
actionstream << "Server: " << playerName << " cannot be authenticated"
<< " (auth handler does not work?)" << std::endl;
if (has_auth) {
std::vector<std::string> pwd_components = str_split(encpwd, '#');
if (pwd_components.size() == 4) {
if (pwd_components[1] == "1") { // 1 means srp
auth_mechs |= AUTH_MECHANISM_SRP;
client->enc_pwd = encpwd;
} else {
actionstream << "User " << playername
<< " tried to log in, but password field"
<< " was invalid (unknown mechcode)." << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
return;
}
if(playerPassword.c_str() != checkpwd) {
actionstream << "Server: " << playerName << " supplied wrong password"
<< std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
} else if (base64_is_valid(encpwd)) {
auth_mechs |= AUTH_MECHANISM_LEGACY_PASSWORD;
client->enc_pwd = encpwd;
} else {
actionstream << "User " << playername
<< " tried to log in, but password field"
<< " was invalid (invalid base64)." << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
return;
}
RemotePlayer *player =
static_cast<RemotePlayer*>(m_env->getPlayer(playername));
if (player && player->peer_id != 0) {
errorstream << "Server: " << playername << ": Failed to emerge player"
<< " (player allocated to an another client)" << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_ALREADY_CONNECTED);
} else {
std::string default_password = g_settings->get("default_password");
if (default_password.length() == 0) {
auth_mechs |= AUTH_MECHANISM_FIRST_SRP;
} else {
// Take care of default passwords.
client->enc_pwd = getSRPVerifier(playerName, default_password);
auth_mechs |= AUTH_MECHANISM_SRP;
}
}
m_clients.setPlayerName(pkt->getPeerId(), playername);
/*
Answer with a TOCLIENT_INIT
Answer with a TOCLIENT_HELLO
*/
NetworkPacket resp_pkt(TOCLIENT_AUTH_ACCEPT, 1 + 6 + 8 + 4, pkt->getPeerId());
verbosestream << "Sending TOCLIENT_HELLO with auth method field: "
<< auth_mechs << std::endl;
resp_pkt << v3f(0,0,0) << (u64) m_env->getServerMap().getSeed()
<< g_settings->getFloat("dedicated_server_step");
NetworkPacket resp_pkt(TOCLIENT_HELLO, 1 + 4
+ legacyPlayerNameCasing.size(), pkt->getPeerId());
resp_pkt << deployed << auth_mechs << legacyPlayerNameCasing;
Send(&resp_pkt);
m_clients.event(pkt->getPeerId(), CSE_Init);
client->allowed_auth_mechs = auth_mechs;
client->setSupportedCompressionModes(compression_modes);
m_clients.event(pkt->getPeerId(), CSE_Hello);
}
void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
@ -354,7 +319,7 @@ void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
return;
}
verbosestream << "Server: Got TOSERVER_INIT from " << addr_s << " (peer_id="
verbosestream << "Server: Got TOSERVER_INIT_LEGACY from " << addr_s << " (peer_id="
<< pkt->getPeerId() << ")" << std::endl;
// Do not allow multiple players in simple singleplayer mode.
@ -422,6 +387,10 @@ void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
net_proto_version = max_net_proto_version;
}
// The client will send up to date init packet, ignore this one
if (net_proto_version >= 25)
return;
verbosestream << "Server: " << addr_s << ": Protocol version: min: "
<< min_net_proto_version << ", max: " << max_net_proto_version
<< ", chosen: " << net_proto_version << std::endl;
@ -624,7 +593,7 @@ void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
<< g_settings->getFloat("dedicated_server_step");
Send(&resp_pkt);
m_clients.event(pkt->getPeerId(), CSE_Init);
m_clients.event(pkt->getPeerId(), CSE_InitLegacy);
}
void Server::handleCommand_Init2(NetworkPacket* pkt)
@ -1223,20 +1192,21 @@ void Server::handleCommand_Breath(NetworkPacket* pkt)
void Server::handleCommand_Password(NetworkPacket* pkt)
{
if ((pkt->getCommand() == TOSERVER_PASSWORD && pkt->getSize() < 4) ||
pkt->getSize() != PASSWORD_SIZE * 2)
if (pkt->getSize() != PASSWORD_SIZE * 2)
return;
std::string oldpwd;
std::string newpwd;
if (pkt->getCommand() == TOSERVER_PASSWORD) {
*pkt >> oldpwd >> newpwd;
// Deny for clients using the new protocol
RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
if (client->net_proto_version >= 25) {
infostream << "Server::handleCommand_Password(): Denying change: "
<< " Client protocol version for peer_id=" << pkt->getPeerId()
<< " too new!" << std::endl;
return;
}
// 13/03/15
// Protocol v24 compat. Please remove in 1 year after
// client convergence to 0.4.13/0.5.x
else {
for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
char c = pkt->getChar(i);
if (c == 0)
@ -1250,7 +1220,6 @@ void Server::handleCommand_Password(NetworkPacket* pkt)
break;
newpwd += c;
}
}
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
@ -1848,3 +1817,258 @@ void Server::handleCommand_InventoryFields(NetworkPacket* pkt)
m_script->on_playerReceiveFields(playersao, formname, fields);
}
void Server::handleCommand_FirstSrp(NetworkPacket* pkt)
{
RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
ClientState cstate = client->getState();
std::string playername = client->getName();
std::string salt;
std::string verification_key;
std::string addr_s = getPeerAddress(pkt->getPeerId()).serializeString();
u8 is_empty;
*pkt >> salt >> verification_key >> is_empty;
verbosestream << "Server: Got TOSERVER_FIRST_SRP from " << addr_s
<< ", with is_empty= " << is_empty << std::endl;
// Either this packet is sent because the user is new or to change the password
if (cstate == CS_HelloSent) {
if (!client->isMechAllowed(AUTH_MECHANISM_FIRST_SRP)) {
actionstream << "Server: Client from " << addr_s
<< " tried to set password without being "
<< "authenticated, or the username being new." << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
return;
}
if (!isSingleplayer() &&
g_settings->getBool("disallow_empty_password") &&
is_empty == 1) {
actionstream << "Server: " << playername
<< " supplied empty password from " << addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_EMPTY_PASSWORD);
return;
}
std::string initial_ver_key;
std::string raw_default_password = g_settings->get("default_password");
// If default_password is empty, allow any initial password
if (raw_default_password.length() == 0) {
initial_ver_key = encodeSRPVerifier(verification_key, salt);
} else {
initial_ver_key = getSRPVerifier(playername, raw_default_password);
}
m_script->createAuth(playername, initial_ver_key);
acceptAuth(pkt->getPeerId(), false);
} else {
if (cstate < CS_SudoMode) {
infostream << "Server::ProcessData(): Ignoring TOSERVER_FIRST_SRP from "
<< addr_s << ": " << "Client has wrong state " << cstate << "."
<< std::endl;
return;
}
m_clients.event(pkt->getPeerId(), CSE_SudoLeave);
std::string pw_db_field = encodeSRPVerifier(verification_key, salt);
bool success = m_script->setPassword(playername, pw_db_field);
if (success) {
actionstream << playername << " changes password" << std::endl;
SendChatMessage(pkt->getPeerId(), L"Password change successful.");
} else {
actionstream << playername << " tries to change password but "
<< "it fails" << std::endl;
SendChatMessage(pkt->getPeerId(), L"Password change failed or unavailable.");
}
}
}
void Server::handleCommand_SrpBytesA(NetworkPacket* pkt)
{
RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
ClientState cstate = client->getState();
bool wantSudo = (cstate == CS_Active);
if (!((cstate == CS_HelloSent) || (cstate == CS_Active))) {
actionstream << "Server: got SRP _A packet in wrong state "
<< cstate << " from "
<< getPeerAddress(pkt->getPeerId()).serializeString()
<< ". Ignoring." << std::endl;
return;
}
if (client->chosen_mech != AUTH_MECHANISM_NONE) {
actionstream << "Server: got SRP _A packet, while auth"
<< "is already going on with mech " << client->chosen_mech
<< " from " << getPeerAddress(pkt->getPeerId()).serializeString()
<< " (wantSudo=" << wantSudo << "). Ignoring." << std::endl;
if (wantSudo) {
DenySudoAccess(pkt->getPeerId());
return;
} else {
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
return;
}
}
std::string bytes_A;
u8 based_on;
*pkt >> bytes_A >> based_on;
infostream << "Server: TOSERVER_SRP_BYTES_A received with "
<< "based_on=" << int(based_on) << " and len_A="
<< bytes_A.length() << "." << std::endl;
AuthMechanism chosen = (based_on == 0) ?
AUTH_MECHANISM_LEGACY_PASSWORD : AUTH_MECHANISM_SRP;
if (wantSudo) {
if (!client->isSudoMechAllowed(chosen)) {
actionstream << "Server: Player \"" << client->getName()
<< "\" at " << getPeerAddress(pkt->getPeerId()).serializeString()
<< " tried to change password using unallowed mech "
<< chosen << "." << std::endl;
DenySudoAccess(pkt->getPeerId());
return;
}
} else {
if (!client->isMechAllowed(chosen)) {
actionstream << "Server: Client tried to authenticate from "
<< getPeerAddress(pkt->getPeerId()).serializeString()
<< " using unallowed mech " << chosen << "." << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
return;
}
}
client->chosen_mech = chosen;
std::string bytes_s;
std::string bytes_v;
if (based_on == 0) {
char *p_bytes_s = 0;
size_t len_s = 0;
char *p_bytes_v = 0;
size_t len_v = 0;
getSRPVerifier(client->getName(), client->enc_pwd,
&p_bytes_s, &len_s,
&p_bytes_v, &len_v);
bytes_s = std::string(p_bytes_s, len_s);
bytes_v = std::string(p_bytes_v, len_v);
free(p_bytes_s);
free(p_bytes_v);
} else if (!decodeSRPVerifier(client->enc_pwd, &bytes_s, &bytes_v)) {
// Non-base64 errors should have been catched in the init handler
actionstream << "Server: User " << client->getName()
<< " tried to log in, but srp verifier field"
<< " was invalid (most likely invalid base64)." << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
return;
}
char *bytes_B = 0;
size_t len_B = 0;
client->auth_data = srp_verifier_new(SRP_SHA256, SRP_NG_2048,
client->getName().c_str(),
(const unsigned char *) bytes_s.c_str(), bytes_s.size(),
(const unsigned char *) bytes_v.c_str(), bytes_v.size(),
(const unsigned char *) bytes_A.c_str(), bytes_A.size(),
NULL, 0,
(unsigned char **) &bytes_B, &len_B, NULL, NULL);
if (!bytes_B) {
actionstream << "Server: User " << client->getName()
<< " tried to log in, SRP-6a safety check violated in _A handler."
<< std::endl;
if (wantSudo) {
DenySudoAccess(pkt->getPeerId());
return;
} else {
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
return;
}
}
NetworkPacket resp_pkt(TOCLIENT_SRP_BYTES_S_B, 0, pkt->getPeerId());
resp_pkt << bytes_s << std::string(bytes_B, len_B);
Send(&resp_pkt);
}
void Server::handleCommand_SrpBytesM(NetworkPacket* pkt)
{
RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
ClientState cstate = client->getState();
bool wantSudo = (cstate == CS_Active);
verbosestream << "Server: Recieved TOCLIENT_SRP_BYTES_M." << std::endl;
if (!((cstate == CS_HelloSent) || (cstate == CS_Active))) {
actionstream << "Server: got SRP _M packet in wrong state "
<< cstate << " from "
<< getPeerAddress(pkt->getPeerId()).serializeString()
<< ". Ignoring." << std::endl;
return;
}
if ((client->chosen_mech != AUTH_MECHANISM_SRP)
&& (client->chosen_mech != AUTH_MECHANISM_LEGACY_PASSWORD)) {
actionstream << "Server: got SRP _M packet, while auth"
<< "is going on with mech " << client->chosen_mech
<< " from " << getPeerAddress(pkt->getPeerId()).serializeString()
<< " (wantSudo=" << wantSudo << "). Denying." << std::endl;
if (wantSudo) {
DenySudoAccess(pkt->getPeerId());
return;
} else {
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
return;
}
}
std::string bytes_M;
*pkt >> bytes_M;
if (srp_verifier_get_session_key_length((SRPVerifier *) client->auth_data)
!= bytes_M.size()) {
actionstream << "Server: User " << client->getName()
<< " at " << getPeerAddress(pkt->getPeerId()).serializeString()
<< " sent bytes_M with invalid length " << bytes_M.size() << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
return;
}
unsigned char *bytes_HAMK = 0;
srp_verifier_verify_session((SRPVerifier *) client->auth_data,
(unsigned char *)bytes_M.c_str(), &bytes_HAMK);
if (!bytes_HAMK) {
if (wantSudo) {
actionstream << "Server: User " << client->getName()
<< " at " << getPeerAddress(pkt->getPeerId()).serializeString()
<< " tried to change their password, but supplied wrong"
<< " (SRP) password for authentication." << std::endl;
DenySudoAccess(pkt->getPeerId());
return;
} else {
actionstream << "Server: User " << client->getName()
<< " at " << getPeerAddress(pkt->getPeerId()).serializeString()
<< " supplied wrong (SRP) password from address "
<< getPeerAddress(pkt->getPeerId()).serializeString()
<< "." << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
return;
}
}
acceptAuth(pkt->getPeerId(), wantSudo);
}

1
src/script/lua_api/l_util.cpp
View File

@ -30,6 +30,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "tool.h"
#include "filesys.h"
#include "settings.h"
#include "util/auth.h"
// debug(...)
// Writes a line to dstream

38
src/server.cpp
View File

@ -2537,6 +2537,13 @@ void Server::RespawnPlayer(u16 peer_id)
playersao->setPos(pos);
}
}
void Server::DenySudoAccess(u16 peer_id)
{
DSTACK(__FUNCTION_NAME);
NetworkPacket pkt(TOCLIENT_DENY_SUDO_MODE, 0, peer_id);
Send(&pkt);
}
void Server::DenyAccess(u16 peer_id, AccessDeniedCode reason, const std::string &custom_reason)
{
@ -2558,6 +2565,37 @@ void Server::DenyAccess_Legacy(u16 peer_id, const std::wstring &reason)
m_con.DisconnectPeer(peer_id);
}
void Server::acceptAuth(u16 peer_id, bool forSudoMode)
{
DSTACK(__FUNCTION_NAME);
if (!forSudoMode) {
RemoteClient* client = getClient(peer_id, CS_Invalid);
NetworkPacket resp_pkt(TOCLIENT_AUTH_ACCEPT, 1 + 6 + 8 + 4, peer_id);
// Right now, the auth mechs don't change between login and sudo mode.
u32 sudo_auth_mechs = client->allowed_auth_mechs;
client->allowed_sudo_mechs = sudo_auth_mechs;
resp_pkt << v3f(0,0,0) << (u64) m_env->getServerMap().getSeed()
<< g_settings->getFloat("dedicated_server_step")
<< sudo_auth_mechs;
Send(&resp_pkt);
m_clients.event(peer_id, CSE_AuthAccept);
} else {
NetworkPacket resp_pkt(TOCLIENT_ACCEPT_SUDO_MODE, 1 + 6 + 8 + 4, peer_id);
// We only support SRP right now
u32 sudo_auth_mechs = AUTH_MECHANISM_FIRST_SRP;
resp_pkt << sudo_auth_mechs;
Send(&resp_pkt);
m_clients.event(peer_id, CSE_SudoSuccess);
}
}
void Server::DeleteClient(u16 peer_id, ClientDeletionReason reason)
{
DSTACK(__FUNCTION_NAME);

6
src/server.h
View File

@ -193,7 +193,6 @@ public:
void handleCommand_Null(NetworkPacket* pkt) {};
void handleCommand_Deprecated(NetworkPacket* pkt);
void handleCommand_Init(NetworkPacket* pkt);
void handleCommand_Auth(NetworkPacket* pkt);
void handleCommand_Init_Legacy(NetworkPacket* pkt);
void handleCommand_Init2(NetworkPacket* pkt);
void handleCommand_RequestMedia(NetworkPacket* pkt);
@ -213,6 +212,9 @@ public:
void handleCommand_RemovedSounds(NetworkPacket* pkt);
void handleCommand_NodeMetaFields(NetworkPacket* pkt);
void handleCommand_InventoryFields(NetworkPacket* pkt);
void handleCommand_FirstSrp(NetworkPacket* pkt);
void handleCommand_SrpBytesA(NetworkPacket* pkt);
void handleCommand_SrpBytesM(NetworkPacket* pkt);
void ProcessData(NetworkPacket *pkt);
@ -360,7 +362,9 @@ public:
void peerAdded(con::Peer *peer);
void deletingPeer(con::Peer *peer, bool timeout);
void DenySudoAccess(u16 peer_id);
void DenyAccess(u16 peer_id, AccessDeniedCode reason, const std::string &custom_reason="");
void acceptAuth(u16 peer_id, bool forSudoMode);
void DenyAccess_Legacy(u16 peer_id, const std::wstring &reason);
bool getClientConInfo(u16 peer_id, con::rtt_stat_type type,float* retval);
bool getClientInfo(u16 peer_id,ClientState* state, u32* uptime,

3
src/util/CMakeLists.txt
View File

@ -1,11 +1,14 @@
set(UTIL_SRCS
${CMAKE_CURRENT_SOURCE_DIR}/auth.cpp
${CMAKE_CURRENT_SOURCE_DIR}/base64.cpp
${CMAKE_CURRENT_SOURCE_DIR}/directiontables.cpp
${CMAKE_CURRENT_SOURCE_DIR}/numeric.cpp
${CMAKE_CURRENT_SOURCE_DIR}/pointedthing.cpp
${CMAKE_CURRENT_SOURCE_DIR}/serialize.cpp
${CMAKE_CURRENT_SOURCE_DIR}/sha1.cpp
${CMAKE_CURRENT_SOURCE_DIR}/sha256.c
${CMAKE_CURRENT_SOURCE_DIR}/string.cpp
${CMAKE_CURRENT_SOURCE_DIR}/srp.cpp
${CMAKE_CURRENT_SOURCE_DIR}/timetaker.cpp
PARENT_SCOPE)

126
src/util/auth.cpp Normal file
View File

@ -0,0 +1,126 @@
/*
Minetest
Copyright (C) 2015 est31 <MTest31@outlook.com>
This program 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 program 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 program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <algorithm>
#include <string>
#include "auth.h"
#include "base64.h"
#include "sha1.h"
#include "srp.h"
#include "string.h"
// Get an sha-1 hash of the player's name combined with
// the password entered. That's what the server uses as
// their password. (Exception : if the password field is
// blank, we send a blank password - this is for backwards
// compatibility with password-less players).
std::string translatePassword(const std::string &name,
const std::string &password)
{
if (password.length() == 0)
return "";
std::string slt = name + password;
SHA1 sha1;
sha1.addBytes(slt.c_str(), slt.length());
unsigned char *digest = sha1.getDigest();
std::string pwd = base64_encode(digest, 20);
free(digest);
return pwd;
}
void getSRPVerifier(const std::string &name,
const std::string &password, char **salt, size_t *salt_len,
char **bytes_v, size_t *len_v)
{
std::string n_name = lowercase(name);
srp_create_salted_verification_key(SRP_SHA256, SRP_NG_2048,
n_name.c_str(), (const unsigned char *)password.c_str(),
password.size(), (unsigned char **)salt, salt_len,
(unsigned char **)bytes_v, len_v, NULL, NULL);
}
// Get a db-ready SRP verifier
// The salt param is only modifyable by this method so that you can free it
// if it was allocated. You shouldn't use it for other purposes, as you will
// need the contents of salt_len too.
inline static std::string getSRPVerifier(const std::string &name,
const std::string &password, char ** salt, size_t salt_len)
{
char * bytes_v = NULL;
size_t len_v;
getSRPVerifier(name, password, salt, &salt_len,
&bytes_v, &len_v);
std::string ret_val = encodeSRPVerifier(std::string(bytes_v, len_v),
std::string(*salt, salt_len));
free(bytes_v);
return ret_val;
}
// Get a db-ready SRP verifier
std::string getSRPVerifier(const std::string &name,
const std::string &password)
{
char * salt = NULL;
std::string ret_val = getSRPVerifier(name,
password, &salt, 0);
free(salt);
return ret_val;
}
// Get a db-ready SRP verifier
std::string getSRPVerifier(const std::string &name,
const std::string &password, const std::string &salt)
{
// The implementation won't change the salt if its set,
// therefore we can cast.
char *salt_cstr = (char *)salt.c_str();
return getSRPVerifier(name, password,
&salt_cstr, salt.size());
}
// Make a SRP verifier db-ready
std::string encodeSRPVerifier(const std::string &verifier,
const std::string &salt)
{
std::ostringstream ret_str;
ret_str << "#1#"
<< base64_encode((unsigned char*) salt.c_str(), salt.size()) << "#"
<< base64_encode((unsigned char*) verifier.c_str(), verifier.size());
return ret_str.str();
}
bool decodeSRPVerifier(const std::string &enc_pwd,
std::string *salt, std::string *bytes_v)
{
std::vector<std::string> pwd_components = str_split(enc_pwd, '#');
if ((pwd_components.size() != 4)
|| (pwd_components[1] != "1") // 1 means srp
|| !base64_is_valid(pwd_components[2])
|| !base64_is_valid(pwd_components[3]))
return false;
std::string salt_str = base64_decode(pwd_components[2]);
std::string bytes_v_str = base64_decode(pwd_components[3]);
*salt = salt_str;
*bytes_v = bytes_v_str;
return true;
}

37
src/util/auth.h Normal file
View File

@ -0,0 +1,37 @@
/*
Minetest
Copyright (C) 2015 est31 <MTest31@outlook.com>
This program 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 program 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 program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef AUTH_H
#define AUTH_H
std::string translatePassword(const std::string &name,
const std::string &password);
void getSRPVerifier(const std::string &name,
const std::string &password, char **salt, size_t *salt_len,
char **bytes_v, size_t *len_v);
std::string getSRPVerifier(const std::string &name,
const std::string &password);
std::string getSRPVerifier(const std::string &name,
const std::string &password, const std::string &salt);
std::string encodeSRPVerifier(const std::string &verifier,
const std::string &salt);
bool decodeSRPVerifier(const std::string &enc_pwd,
std::string *salt, std::string *bytes_v);
#endif

428
src/util/md32_common.h Normal file
View File

@ -0,0 +1,428 @@
/* md32_common.h file used by sha256 implementation */
/* ====================================================================
* Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
*/
/*-
* This is a generic 32 bit "collector" for message digest algorithms.
* Whenever needed it collects input character stream into chunks of
* 32 bit values and invokes a block function that performs actual hash
* calculations.
*
* Porting guide.
*
* Obligatory macros:
*
* DATA_ORDER_IS_BIG_ENDIAN or DATA_ORDER_IS_LITTLE_ENDIAN
* this macro defines byte order of input stream.
* HASH_CBLOCK
* size of a unit chunk HASH_BLOCK operates on.
* HASH_LONG
* has to be at lest 32 bit wide, if it's wider, then
* HASH_LONG_LOG2 *has to* be defined along
* HASH_CTX
* context structure that at least contains following
* members:
* typedef struct {
* ...
* HASH_LONG Nl,Nh;
* either {
* HASH_LONG data[HASH_LBLOCK];
* unsigned char data[HASH_CBLOCK];
* };
* unsigned int num;
* ...
* } HASH_CTX;
* data[] vector is expected to be zeroed upon first call to
* HASH_UPDATE.
* HASH_UPDATE
* name of "Update" function, implemented here.
* HASH_TRANSFORM
* name of "Transform" function, implemented here.
* HASH_FINAL
* name of "Final" function, implemented here.
* HASH_BLOCK_DATA_ORDER
* name of "block" function capable of treating *unaligned* input
* message in original (data) byte order, implemented externally.
* HASH_MAKE_STRING
* macro convering context variables to an ASCII hash string.
*
* MD5 example:
*
* #define DATA_ORDER_IS_LITTLE_ENDIAN
*
* #define HASH_LONG MD5_LONG
* #define HASH_LONG_LOG2 MD5_LONG_LOG2
* #define HASH_CTX MD5_CTX
* #define HASH_CBLOCK MD5_CBLOCK
* #define HASH_UPDATE MD5_Update
* #define HASH_TRANSFORM MD5_Transform
* #define HASH_FINAL MD5_Final
* #define HASH_BLOCK_DATA_ORDER md5_block_data_order
*
* <appro@fy.chalmers.se>
*/
#if !defined(DATA_ORDER_IS_BIG_ENDIAN) && !defined(DATA_ORDER_IS_LITTLE_ENDIAN)
# error "DATA_ORDER must be defined!"
#endif
#ifndef HASH_CBLOCK
# error "HASH_CBLOCK must be defined!"
#endif
#ifndef HASH_LONG
# error "HASH_LONG must be defined!"
#endif
#ifndef HASH_CTX
# error "HASH_CTX must be defined!"
#endif
#ifndef HASH_UPDATE
# error "HASH_UPDATE must be defined!"
#endif
#ifndef HASH_TRANSFORM
# error "HASH_TRANSFORM must be defined!"
#endif
#ifndef HASH_FINAL
# error "HASH_FINAL must be defined!"
#endif
#ifndef HASH_BLOCK_DATA_ORDER
# error "HASH_BLOCK_DATA_ORDER must be defined!"
#endif
/*
* Engage compiler specific rotate intrinsic function if available.
*/
#undef ROTATE
#ifndef PEDANTIC
# if defined(_MSC_VER)
# define ROTATE(a,n) _lrotl(a,n)
# elif defined(__ICC)
# define ROTATE(a,n) _rotl(a,n)
# elif defined(__MWERKS__)
# if defined(__POWERPC__)
# define ROTATE(a,n) __rlwinm(a,n,0,31)
# elif defined(__MC68K__)
/* Motorola specific tweak. <appro@fy.chalmers.se> */
# define ROTATE(a,n) ( n<24 ? __rol(a,n) : __ror(a,32-n) )
# else
# define ROTATE(a,n) __rol(a,n)
# endif
# elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
/*
* Some GNU C inline assembler templates. Note that these are
* rotates by *constant* number of bits! But that's exactly
* what we need here...
* <appro@fy.chalmers.se>
*/
# if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
# define ROTATE(a,n) ({ register unsigned int ret; \
asm ( \
"roll %1,%0" \
: "=r"(ret) \
: "I"(n), "0"((unsigned int)(a)) \
: "cc"); \
ret; \
})
# elif defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
defined(__powerpc) || defined(__ppc__) || defined(__powerpc64__)
# define ROTATE(a,n) ({ register unsigned int ret; \
asm ( \
"rlwinm %0,%1,%2,0,31" \
: "=r"(ret) \
: "r"(a), "I"(n)); \
ret; \
})
# elif defined(__s390x__)
# define ROTATE(a,n) ({ register unsigned int ret; \
asm ("rll %0,%1,%2" \
: "=r"(ret) \
: "r"(a), "I"(n)); \
ret; \
})
# endif
# endif
#endif /* PEDANTIC */
#ifndef ROTATE
# define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
#endif
#if defined(DATA_ORDER_IS_BIG_ENDIAN)
# ifndef PEDANTIC
# if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
# if ((defined(__i386) || defined(__i386__)) && !defined(I386_ONLY)) || \
(defined(__x86_64) || defined(__x86_64__))
# if !defined(B_ENDIAN)
/*
* This gives ~30-40% performance improvement in SHA-256 compiled
* with gcc [on P4]. Well, first macro to be frank. We can pull
* this trick on x86* platforms only, because these CPUs can fetch
* unaligned data without raising an exception.
*/
# define HOST_c2l(c,l) ({ unsigned int r=*((const unsigned int *)(c)); \
asm ("bswapl %0":"=r"(r):"0"(r)); \
(c)+=4; (l)=r; })
# define HOST_l2c(l,c) ({ unsigned int r=(l); \
asm ("bswapl %0":"=r"(r):"0"(r)); \
*((unsigned int *)(c))=r; (c)+=4; r; })
# endif
# elif defined(__aarch64__)
# if defined(__BYTE_ORDER__)
# if defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__
# define HOST_c2l(c,l) ({ unsigned int r; \
asm ("rev %w0,%w1" \
:"=r"(r) \
:"r"(*((const unsigned int *)(c))));\
(c)+=4; (l)=r; })
# define HOST_l2c(l,c) ({ unsigned int r; \
asm ("rev %w0,%w1" \
:"=r"(r) \
:"r"((unsigned int)(l)));\
*((unsigned int *)(c))=r; (c)+=4; r; })
# elif defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__==__ORDER_BIG_ENDIAN__
# define HOST_c2l(c,l) ((l)=*((const unsigned int *)(c)), (c)+=4, (l))
# define HOST_l2c(l,c) (*((unsigned int *)(c))=(l), (c)+=4, (l))
# endif
# endif
# endif
# endif
# if defined(__s390__) || defined(__s390x__)
# define HOST_c2l(c,l) ((l)=*((const unsigned int *)(c)), (c)+=4, (l))
# define HOST_l2c(l,c) (*((unsigned int *)(c))=(l), (c)+=4, (l))
# endif
# endif
# ifndef HOST_c2l
# define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++)))<<24), \
l|=(((unsigned long)(*((c)++)))<<16), \
l|=(((unsigned long)(*((c)++)))<< 8), \
l|=(((unsigned long)(*((c)++))) ) )
# endif
# ifndef HOST_l2c
# define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
*((c)++)=(unsigned char)(((l) )&0xff), \
l)
# endif
#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
# ifndef PEDANTIC
# if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
# if defined(__s390x__)
# define HOST_c2l(c,l) ({ asm ("lrv %0,%1" \
:"=d"(l) :"m"(*(const unsigned int *)(c)));\
(c)+=4; (l); })
# define HOST_l2c(l,c) ({ asm ("strv %1,%0" \
:"=m"(*(unsigned int *)(c)) :"d"(l));\
(c)+=4; (l); })
# endif
# endif
# if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
# ifndef B_ENDIAN
/* See comment in DATA_ORDER_IS_BIG_ENDIAN section. */
# define HOST_c2l(c,l) ((l)=*((const unsigned int *)(c)), (c)+=4, l)
# define HOST_l2c(l,c) (*((unsigned int *)(c))=(l), (c)+=4, l)
# endif
# endif
# endif
# ifndef HOST_c2l
# define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++))) ), \
l|=(((unsigned long)(*((c)++)))<< 8), \
l|=(((unsigned long)(*((c)++)))<<16), \
l|=(((unsigned long)(*((c)++)))<<24) )
# endif
# ifndef HOST_l2c
# define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
*((c)++)=(unsigned char)(((l)>>24)&0xff), \
l)
# endif
#endif
/*
* Time for some action:-)
*/
int HASH_UPDATE(HASH_CTX *c, const void *data_, size_t len)
{
const unsigned char *data = data_;
unsigned char *p;
HASH_LONG l;
size_t n;
if (len == 0)
return 1;
l = (c->Nl + (((HASH_LONG) len) << 3)) & 0xffffffffUL;
/*
* 95-05-24 eay Fixed a bug with the overflow handling, thanks to Wei Dai
* <weidai@eskimo.com> for pointing it out.
*/
if (l < c->Nl) /* overflow */
c->Nh++;
c->Nh += (HASH_LONG) (len >> 29); /* might cause compiler warning on
* 16-bit */
c->Nl = l;
n = c->num;
if (n != 0) {
p = (unsigned char *)c->data;
if (len >= HASH_CBLOCK || len + n >= HASH_CBLOCK) {
memcpy(p + n, data, HASH_CBLOCK - n);
HASH_BLOCK_DATA_ORDER(c, p, 1);
n = HASH_CBLOCK - n;
data += n;
len -= n;
c->num = 0;
memset(p, 0, HASH_CBLOCK); /* keep it zeroed */
} else {
memcpy(p + n, data, len);
c->num += (unsigned int)len;
return 1;
}
}
n = len / HASH_CBLOCK;
if (n > 0) {
HASH_BLOCK_DATA_ORDER(c, data, n);
n *= HASH_CBLOCK;
data += n;
len -= n;
}
if (len != 0) {
p = (unsigned char *)c->data;
c->num = (unsigned int)len;
memcpy(p, data, len);
}
return 1;
}
void HASH_TRANSFORM(HASH_CTX *c, const unsigned char *data)
{
HASH_BLOCK_DATA_ORDER(c, data, 1);
}
int HASH_FINAL(unsigned char *md, HASH_CTX *c)
{
unsigned char *p = (unsigned char *)c->data;
size_t n = c->num;
p[n] = 0x80; /* there is always room for one */
n++;
if (n > (HASH_CBLOCK - 8)) {
memset(p + n, 0, HASH_CBLOCK - n);
n = 0;
HASH_BLOCK_DATA_ORDER(c, p, 1);
}
memset(p + n, 0, HASH_CBLOCK - 8 - n);
p += HASH_CBLOCK - 8;
#if defined(DATA_ORDER_IS_BIG_ENDIAN)
(void)HOST_l2c(c->Nh, p);
(void)HOST_l2c(c->Nl, p);
#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
(void)HOST_l2c(c->Nl, p);
(void)HOST_l2c(c->Nh, p);
#endif
p -= HASH_CBLOCK;
HASH_BLOCK_DATA_ORDER(c, p, 1);
c->num = 0;
memset(p, 0, HASH_CBLOCK);
#ifndef HASH_MAKE_STRING
# error "HASH_MAKE_STRING must be defined!"
#else
HASH_MAKE_STRING(c, md);
#endif
return 1;
}
#ifndef MD32_REG_T
# if defined(__alpha) || defined(__sparcv9) || defined(__mips)
# define MD32_REG_T long
/*
* This comment was originaly written for MD5, which is why it
* discusses A-D. But it basically applies to all 32-bit digests,
* which is why it was moved to common header file.
*
* In case you wonder why A-D are declared as long and not
* as MD5_LONG. Doing so results in slight performance
* boost on LP64 architectures. The catch is we don't
* really care if 32 MSBs of a 64-bit register get polluted
* with eventual overflows as we *save* only 32 LSBs in
* *either* case. Now declaring 'em long excuses the compiler
* from keeping 32 MSBs zeroed resulting in 13% performance
* improvement under SPARC Solaris7/64 and 5% under AlphaLinux.
* Well, to be honest it should say that this *prevents*
* performance degradation.
* <appro@fy.chalmers.se>
*/
# else
/*
* Above is not absolute and there are LP64 compilers that
* generate better code if MD32_REG_T is defined int. The above
* pre-processor condition reflects the circumstances under which
* the conclusion was made and is subject to further extension.
* <appro@fy.chalmers.se>
*/
# define MD32_REG_T int
# endif
#endif

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/* crypto/sha/sha.h */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#ifndef HEADER_SHA_H
# define HEADER_SHA_H
# include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
# if defined(OPENSSL_NO_SHA) || (defined(OPENSSL_NO_SHA0) && defined(OPENSSL_NO_SHA1))
# error SHA is disabled.
# endif
# if defined(OPENSSL_FIPS)
# define FIPS_SHA_SIZE_T size_t
# endif
/*
Compat stuff from OpenSSL land
*/
/* crypto.h */
# define fips_md_init(alg) fips_md_init_ctx(alg, alg)
# define fips_md_init_ctx(alg, cx) \
int alg##_Init(cx##_CTX *c)
# define fips_cipher_abort(alg) while(0)
/*-
* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
* ! SHA_LONG has to be at least 32 bits wide. If it's wider, then !
* ! SHA_LONG_LOG2 has to be defined along. !
* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*/
# if defined(__LP32__)
# define SHA_LONG unsigned long
# elif defined(__ILP64__)
# define SHA_LONG unsigned long
# define SHA_LONG_LOG2 3
# else
# define SHA_LONG unsigned int
# endif
# define SHA_LBLOCK 16
# define SHA_CBLOCK (SHA_LBLOCK*4)/* SHA treats input data as a
* contiguous array of 32 bit wide
* big-endian values. */
# define SHA_LAST_BLOCK (SHA_CBLOCK-8)
# define SHA_DIGEST_LENGTH 20
typedef struct SHAstate_st {
SHA_LONG h0, h1, h2, h3, h4;
SHA_LONG Nl, Nh;
SHA_LONG data[SHA_LBLOCK];
unsigned int num;
} SHA_CTX;
# define SHA256_CBLOCK (SHA_LBLOCK*4)/* SHA-256 treats input data as a
* contiguous array of 32 bit wide
* big-endian values. */
# define SHA224_DIGEST_LENGTH 28
# define SHA256_DIGEST_LENGTH 32
typedef struct SHA256state_st {
SHA_LONG h[8];
SHA_LONG Nl, Nh;
SHA_LONG data[SHA_LBLOCK];
unsigned int num, md_len;
} SHA256_CTX;
# ifndef OPENSSL_NO_SHA256
# ifdef OPENSSL_FIPS
int private_SHA224_Init(SHA256_CTX *c);
int private_SHA256_Init(SHA256_CTX *c);
# endif
int SHA224_Init(SHA256_CTX *c);
int SHA224_Update(SHA256_CTX *c, const void *data, size_t len);
int SHA224_Final(unsigned char *md, SHA256_CTX *c);
unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md);
int SHA256_Init(SHA256_CTX *c);
int SHA256_Update(SHA256_CTX *c, const void *data, size_t len);
int SHA256_Final(unsigned char *md, SHA256_CTX *c);
unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md);
void SHA256_Transform(SHA256_CTX *c, const unsigned char *data);
# endif
# define SHA384_DIGEST_LENGTH 48
# define SHA512_DIGEST_LENGTH 64
#ifdef __cplusplus
}
#endif
#endif

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/* crypto/sha/sha256.c */
/* ====================================================================
* Copyright (c) 2004 The OpenSSL Project. All rights reserved
* according to the OpenSSL license [found in ../../LICENSE].
* ====================================================================
*/
# include <stdlib.h>
# include <string.h>
# include <util/sha2.h>
# define OPENSSL_VERSION_TEXT "OpenSSL 1.0.2a 19 Mar 2015"
# define OPENSSL_VERSION_PTEXT " part of " OPENSSL_VERSION_TEXT
const char SHA256_version[] = "SHA-256" OPENSSL_VERSION_PTEXT;
/* mem_clr.c */
unsigned char cleanse_ctr = 0;
void OPENSSL_cleanse(void *ptr, size_t len)
{
unsigned char *p = ptr;
size_t loop = len, ctr = cleanse_ctr;
while (loop--) {
*(p++) = (unsigned char)ctr;
ctr += (17 + ((size_t)p & 0xF));
}
p = memchr(ptr, (unsigned char)ctr, len);
if (p)
ctr += (63 + (size_t)p);
cleanse_ctr = (unsigned char)ctr;
}
# define fips_md_init(alg) fips_md_init_ctx(alg, alg)
# define fips_md_init_ctx(alg, cx) \
int alg##_Init(cx##_CTX *c)
# define fips_cipher_abort(alg) while(0)
fips_md_init_ctx(SHA224, SHA256)
{
memset(c, 0, sizeof(*c));
c->h[0] = 0xc1059ed8UL;
c->h[1] = 0x367cd507UL;
c->h[2] = 0x3070dd17UL;
c->h[3] = 0xf70e5939UL;
c->h[4] = 0xffc00b31UL;
c->h[5] = 0x68581511UL;
c->h[6] = 0x64f98fa7UL;
c->h[7] = 0xbefa4fa4UL;
c->md_len = SHA224_DIGEST_LENGTH;
return 1;
}
fips_md_init(SHA256)
{
memset(c, 0, sizeof(*c));
c->h[0] = 0x6a09e667UL;
c->h[1] = 0xbb67ae85UL;
c->h[2] = 0x3c6ef372UL;
c->h[3] = 0xa54ff53aUL;
c->h[4] = 0x510e527fUL;
c->h[5] = 0x9b05688cUL;
c->h[6] = 0x1f83d9abUL;
c->h[7] = 0x5be0cd19UL;
c->md_len = SHA256_DIGEST_LENGTH;
return 1;
}
unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md)
{
SHA256_CTX c;
static unsigned char m[SHA224_DIGEST_LENGTH];
if (md == NULL)
md = m;
SHA224_Init(&c);
SHA256_Update(&c, d, n);
SHA256_Final(md, &c);
OPENSSL_cleanse(&c, sizeof(c));
return (md);
}
unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md)
{
SHA256_CTX c;
static unsigned char m[SHA256_DIGEST_LENGTH];
if (md == NULL)
md = m;
SHA256_Init(&c);
SHA256_Update(&c, d, n);
SHA256_Final(md, &c);
OPENSSL_cleanse(&c, sizeof(c));
return (md);
}
int SHA224_Update(SHA256_CTX *c, const void *data, size_t len)
{
return SHA256_Update(c, data, len);
}
int SHA224_Final(unsigned char *md, SHA256_CTX *c)
{
return SHA256_Final(md, c);
}
# define DATA_ORDER_IS_BIG_ENDIAN
# define HASH_LONG SHA_LONG
# define HASH_CTX SHA256_CTX
# define HASH_CBLOCK SHA_CBLOCK
/*
* Note that FIPS180-2 discusses "Truncation of the Hash Function Output."
* default: case below covers for it. It's not clear however if it's
* permitted to truncate to amount of bytes not divisible by 4. I bet not,
* but if it is, then default: case shall be extended. For reference.
* Idea behind separate cases for pre-defined lenghts is to let the
* compiler decide if it's appropriate to unroll small loops.
*/
# define HASH_MAKE_STRING(c,s) do { \
unsigned long ll; \
unsigned int nn; \
switch ((c)->md_len) \
{ case SHA224_DIGEST_LENGTH: \
for (nn=0;nn<SHA224_DIGEST_LENGTH/4;nn++) \
{ ll=(c)->h[nn]; (void)HOST_l2c(ll,(s)); } \
break; \
case SHA256_DIGEST_LENGTH: \
for (nn=0;nn<SHA256_DIGEST_LENGTH/4;nn++) \
{ ll=(c)->h[nn]; (void)HOST_l2c(ll,(s)); } \
break; \
default: \
if ((c)->md_len > SHA256_DIGEST_LENGTH) \
return 0; \
for (nn=0;nn<(c)->md_len/4;nn++) \
{ ll=(c)->h[nn]; (void)HOST_l2c(ll,(s)); } \
break; \
} \
} while (0)
# define HASH_UPDATE SHA256_Update
# define HASH_TRANSFORM SHA256_Transform
# define HASH_FINAL SHA256_Final
# define HASH_BLOCK_DATA_ORDER sha256_block_data_order
# ifndef SHA256_ASM
static
# endif
void sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num);
# include "md32_common.h"
# ifndef SHA256_ASM
static const SHA_LONG K256[64] = {
0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
};
/*
* FIPS specification refers to right rotations, while our ROTATE macro
* is left one. This is why you might notice that rotation coefficients
* differ from those observed in FIPS document by 32-N...
*/
# define Sigma0(x) (ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10))
# define Sigma1(x) (ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7))
# define sigma0(x) (ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3))
# define sigma1(x) (ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10))
# define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
# define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
# ifdef OPENSSL_SMALL_FOOTPRINT
static void sha256_block_data_order(SHA256_CTX *ctx, const void *in,
size_t num)
{
unsigned MD32_REG_T a, b, c, d, e, f, g, h, s0, s1, T1, T2;
SHA_LONG X[16], l;
int i;
const unsigned char *data = in;
while (num--) {
a = ctx->h[0];
b = ctx->h[1];
c = ctx->h[2];
d = ctx->h[3];
e = ctx->h[4];
f = ctx->h[5];
g = ctx->h[6];
h = ctx->h[7];
for (i = 0; i < 16; i++) {
HOST_c2l(data, l);
T1 = X[i] = l;
T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i];
T2 = Sigma0(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
}
for (; i < 64; i++) {
s0 = X[(i + 1) & 0x0f];
s0 = sigma0(s0);
s1 = X[(i + 14) & 0x0f];
s1 = sigma1(s1);
T1 = X[i & 0xf] += s0 + s1 + X[(i + 9) & 0xf];
T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i];
T2 = Sigma0(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
}
ctx->h[0] += a;
ctx->h[1] += b;
ctx->h[2] += c;
ctx->h[3] += d;
ctx->h[4] += e;
ctx->h[5] += f;
ctx->h[6] += g;
ctx->h[7] += h;
}
}
# else
# define ROUND_00_15(i,a,b,c,d,e,f,g,h) do { \
T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i]; \
h = Sigma0(a) + Maj(a,b,c); \
d += T1; h += T1; } while (0)
# define ROUND_16_63(i,a,b,c,d,e,f,g,h,X) do { \
s0 = X[(i+1)&0x0f]; s0 = sigma0(s0); \
s1 = X[(i+14)&0x0f]; s1 = sigma1(s1); \
T1 = X[(i)&0x0f] += s0 + s1 + X[(i+9)&0x0f]; \
ROUND_00_15(i,a,b,c,d,e,f,g,h); } while (0)
static void sha256_block_data_order(SHA256_CTX *ctx, const void *in,
size_t num)
{
unsigned MD32_REG_T a, b, c, d, e, f, g, h, s0, s1, T1;
SHA_LONG X[16];
int i;
const unsigned char *data = in;
const union {
long one;
char little;
} is_endian = {
1
};
while (num--) {
a = ctx->h[0];
b = ctx->h[1];
c = ctx->h[2];
d = ctx->h[3];
e = ctx->h[4];
f = ctx->h[5];
g = ctx->h[6];
h = ctx->h[7];
if (!is_endian.little && sizeof(SHA_LONG) == 4
&& ((size_t)in % 4) == 0) {
const SHA_LONG *W = (const SHA_LONG *)data;
T1 = X[0] = W[0];
ROUND_00_15(0, a, b, c, d, e, f, g, h);
T1 = X[1] = W[1];
ROUND_00_15(1, h, a, b, c, d, e, f, g);
T1 = X[2] = W[2];
ROUND_00_15(2, g, h, a, b, c, d, e, f);
T1 = X[3] = W[3];
ROUND_00_15(3, f, g, h, a, b, c, d, e);
T1 = X[4] = W[4];
ROUND_00_15(4, e, f, g, h, a, b, c, d);
T1 = X[5] = W[5];
ROUND_00_15(5, d, e, f, g, h, a, b, c);
T1 = X[6] = W[6];
ROUND_00_15(6, c, d, e, f, g, h, a, b);
T1 = X[7] = W[7];
ROUND_00_15(7, b, c, d, e, f, g, h, a);
T1 = X[8] = W[8];
ROUND_00_15(8, a, b, c, d, e, f, g, h);
T1 = X[9] = W[9];
ROUND_00_15(9, h, a, b, c, d, e, f, g);
T1 = X[10] = W[10];
ROUND_00_15(10, g, h, a, b, c, d, e, f);
T1 = X[11] = W[11];
ROUND_00_15(11, f, g, h, a, b, c, d, e);
T1 = X[12] = W[12];
ROUND_00_15(12, e, f, g, h, a, b, c, d);
T1 = X[13] = W[13];
ROUND_00_15(13, d, e, f, g, h, a, b, c);
T1 = X[14] = W[14];
ROUND_00_15(14, c, d, e, f, g, h, a, b);
T1 = X[15] = W[15];
ROUND_00_15(15, b, c, d, e, f, g, h, a);
data += SHA256_CBLOCK;
} else {
SHA_LONG l;
HOST_c2l(data, l);
T1 = X[0] = l;
ROUND_00_15(0, a, b, c, d, e, f, g, h);
HOST_c2l(data, l);
T1 = X[1] = l;
ROUND_00_15(1, h, a, b, c, d, e, f, g);
HOST_c2l(data, l);
T1 = X[2] = l;
ROUND_00_15(2, g, h, a, b, c, d, e, f);
HOST_c2l(data, l);
T1 = X[3] = l;
ROUND_00_15(3, f, g, h, a, b, c, d, e);
HOST_c2l(data, l);
T1 = X[4] = l;
ROUND_00_15(4, e, f, g, h, a, b, c, d);
HOST_c2l(data, l);
T1 = X[5] = l;
ROUND_00_15(5, d, e, f, g, h, a, b, c);
HOST_c2l(data, l);
T1 = X[6] = l;
ROUND_00_15(6, c, d, e, f, g, h, a, b);
HOST_c2l(data, l);
T1 = X[7] = l;
ROUND_00_15(7, b, c, d, e, f, g, h, a);
HOST_c2l(data, l);
T1 = X[8] = l;
ROUND_00_15(8, a, b, c, d, e, f, g, h);
HOST_c2l(data, l);
T1 = X[9] = l;
ROUND_00_15(9, h, a, b, c, d, e, f, g);
HOST_c2l(data, l);
T1 = X[10] = l;
ROUND_00_15(10, g, h, a, b, c, d, e, f);
HOST_c2l(data, l);
T1 = X[11] = l;
ROUND_00_15(11, f, g, h, a, b, c, d, e);
HOST_c2l(data, l);
T1 = X[12] = l;
ROUND_00_15(12, e, f, g, h, a, b, c, d);
HOST_c2l(data, l);
T1 = X[13] = l;
ROUND_00_15(13, d, e, f, g, h, a, b, c);
HOST_c2l(data, l);
T1 = X[14] = l;
ROUND_00_15(14, c, d, e, f, g, h, a, b);
HOST_c2l(data, l);
T1 = X[15] = l;
ROUND_00_15(15, b, c, d, e, f, g, h, a);
}
for (i = 16; i < 64; i += 8) {
ROUND_16_63(i + 0, a, b, c, d, e, f, g, h, X);
ROUND_16_63(i + 1, h, a, b, c, d, e, f, g, X);
ROUND_16_63(i + 2, g, h, a, b, c, d, e, f, X);
ROUND_16_63(i + 3, f, g, h, a, b, c, d, e, X);
ROUND_16_63(i + 4, e, f, g, h, a, b, c, d, X);
ROUND_16_63(i + 5, d, e, f, g, h, a, b, c, X);
ROUND_16_63(i + 6, c, d, e, f, g, h, a, b, X);
ROUND_16_63(i + 7, b, c, d, e, f, g, h, a, X);
}
ctx->h[0] += a;
ctx->h[1] += b;
ctx->h[2] += c;
ctx->h[3] += d;
ctx->h[4] += e;
ctx->h[5] += f;
ctx->h[6] += g;
ctx->h[7] += h;
}
}
# endif
# endif /* SHA256_ASM */

1029
src/util/srp.cpp Normal file
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File diff suppressed because it is too large Load Diff

171
src/util/srp.h Normal file
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@ -0,0 +1,171 @@
/*
* Secure Remote Password 6a implementation
* https://github.com/est31/csrp-gmp
*
* The MIT License (MIT)
*
* Copyright (c) 2010, 2013 Tom Cocagne, 2015 est31 <MTest31@outlook.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
/*
*
* Purpose: This is a direct implementation of the Secure Remote Password
* Protocol version 6a as described by
* http://srp.stanford.edu/design.html
*
* Author: tom.cocagne@gmail.com (Tom Cocagne)
*
* Dependencies: LibGMP
*
* Usage: Refer to test_srp.c for a demonstration
*
* Notes:
* This library allows multiple combinations of hashing algorithms and
* prime number constants. For authentication to succeed, the hash and
* prime number constants must match between
* srp_create_salted_verification_key(), srp_user_new(),
* and srp_verifier_new(). A recommended approach is to determine the
* desired level of security for an application and globally define the
* hash and prime number constants to the predetermined values.
*
* As one might suspect, more bits means more security. As one might also
* suspect, more bits also means more processing time. The test_srp.c
* program can be easily modified to profile various combinations of
* hash & prime number pairings.
*/
#ifndef SRP_H
#define SRP_H
struct SRPVerifier;
struct SRPUser;
typedef enum
{
SRP_NG_1024,
SRP_NG_2048,
SRP_NG_4096,
SRP_NG_8192,
SRP_NG_CUSTOM
} SRP_NGType;
typedef enum
{
/*SRP_SHA1,*/
/*SRP_SHA224,*/
SRP_SHA256,
/*SRP_SHA384,
SRP_SHA512*/
} SRP_HashAlgorithm;
/* Out: bytes_v, len_v
*
* The caller is responsible for freeing the memory allocated for bytes_v
*
* The n_hex and g_hex parameters should be 0 unless SRP_NG_CUSTOM is used for ng_type.
* If provided, they must contain ASCII text of the hexidecimal notation.
*
* If bytes_s == NULL, it is filled with random data. The caller is responsible for freeing.
*/
void srp_create_salted_verification_key( SRP_HashAlgorithm alg,
SRP_NGType ng_type, const char *username_for_verifier,
const unsigned char *password, size_t len_password,
unsigned char **bytes_s, size_t *len_s,
unsigned char **bytes_v, size_t *len_v,
const char * n_hex, const char *g_hex );
/* Out: bytes_B, len_B.
*
* On failure, bytes_B will be set to NULL and len_B will be set to 0
*
* The n_hex and g_hex parameters should be 0 unless SRP_NG_CUSTOM is used for ng_type
*
* If bytes_b == NULL, random data is used for b.
*/
struct SRPVerifier* srp_verifier_new(SRP_HashAlgorithm alg, SRP_NGType ng_type,
const char *username,
const unsigned char *bytes_s, size_t len_s,
const unsigned char *bytes_v, size_t len_v,
const unsigned char *bytes_A, size_t len_A,
const unsigned char *bytes_b, size_t len_b,
unsigned char** bytes_B, size_t *len_B,
const char* n_hex, const char* g_hex);
void srp_verifier_delete( struct SRPVerifier* ver );
int srp_verifier_is_authenticated( struct SRPVerifier* ver );
const char * srp_verifier_get_username( struct SRPVerifier* ver );
/* key_length may be null */
const unsigned char* srp_verifier_get_session_key( struct SRPVerifier* ver,
size_t *key_length );
size_t srp_verifier_get_session_key_length(struct SRPVerifier* ver);
/* user_M must be exactly srp_verifier_get_session_key_length() bytes in size */
void srp_verifier_verify_session( struct SRPVerifier* ver,
const unsigned char* user_M, unsigned char** bytes_HAMK );
/*******************************************************************************/
/* The n_hex and g_hex parameters should be 0 unless SRP_NG_CUSTOM is used for ng_type */
struct SRPUser *srp_user_new(SRP_HashAlgorithm alg, SRP_NGType ng_type,
const char *username, const char *username_for_verifier,
const unsigned char *bytes_password, size_t len_password,
const char *n_hex, const char *g_hex);
void srp_user_delete(struct SRPUser * usr);
int srp_user_is_authenticated(struct SRPUser * usr);
const char* srp_user_get_username(struct SRPUser * usr);
/* key_length may be null */
const unsigned char* srp_user_get_session_key(struct SRPUser* usr, size_t* key_length);
size_t srp_user_get_session_key_length(struct SRPUser* usr);
/* Output: username, bytes_A, len_A. If you don't want it get written, set username to NULL.
* If bytes_a == NULL, random data is used for a. */
void srp_user_start_authentication(struct SRPUser* usr, char** username,
const unsigned char* bytes_a, size_t len_a,
unsigned char** bytes_A, size_t* len_A);
/* Output: bytes_M, len_M (len_M may be null and will always be
* srp_user_get_session_key_length() bytes in size) */
void srp_user_process_challenge(struct SRPUser *usr,
const unsigned char *bytes_s, size_t len_s,
const unsigned char *bytes_B, size_t len_B,
unsigned char **bytes_M, size_t *len_M);
/* bytes_HAMK must be exactly srp_user_get_session_key_length() bytes in size */
void srp_user_verify_session(struct SRPUser* usr, const unsigned char* bytes_HAMK);
#endif /* Include Guard */

23
src/util/string.cpp
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@ -22,12 +22,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "numeric.h"
#include "log.h"
#include "sha1.h"
#include "base64.h"
#include "hex.h"
#include "../porting.h"
#include <algorithm>
#include <sstream>
#include <iomanip>
#include <map>
@ -176,26 +173,6 @@ std::string wide_to_narrow(const std::wstring &wcs)
#endif
// Get an sha-1 hash of the player's name combined with
// the password entered. That's what the server uses as
// their password. (Exception : if the password field is
// blank, we send a blank password - this is for backwards
// compatibility with password-less players).
std::string translatePassword(const std::string &playername,
const std::string &password)
{
if (password.length() == 0)
return "";
std::string slt = playername + password;
SHA1 sha1;
sha1.addBytes(slt.c_str(), slt.length());
unsigned char *digest = sha1.getDigest();
std::string pwd = base64_encode(digest, 20);
free(digest);
return pwd;
}
std::string urlencode(std::string str)
{
// Encodes non-unreserved URI characters by a percent sign

3
src/util/string.h
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@ -43,8 +43,7 @@ wchar_t *narrow_to_wide_c(const char *str);
std::wstring narrow_to_wide(const std::string &mbs);
std::string wide_to_narrow(const std::wstring &wcs);
std::string translatePassword(const std::string &playername,
const std::string &password);
std::string urlencode(std::string str);
std::string urldecode(std::string str);
u32 readFlagString(std::string str, const FlagDesc *flagdesc, u32 *flagmask);