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Moved cruft out of smb.h into ntdomain.h where it belongs. dc struct

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now in pipe struct (where used) rather than user_struct.
Secured machine account password changing in srv_netlog_nt.c - ensure
that only the given machine can change its own password. May need to
free this up later for NT admin tools, but this is a fail-safe secure
position for now.
Jeremy.
This commit is contained in:
Jeremy Allison 0001-01-01 00:00:00 +00:00
parent be9933ce35
commit 46b12f2275
6 changed files with 77 additions and 134 deletions
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33
source/include/ntdomain.h
View File

@ -24,7 +24,6 @@
#ifndef _NT_DOMAIN_H /* _NT_DOMAIN_H */ #ifndef _NT_DOMAIN_H /* _NT_DOMAIN_H */
#define _NT_DOMAIN_H #define _NT_DOMAIN_H
/* dce/rpc support */ /* dce/rpc support */
#include "rpc_dce.h" #include "rpc_dce.h"
@ -137,21 +136,6 @@ typedef struct _input_data {
prs_struct data; prs_struct data;
} input_data; } input_data;
struct msrpc_state
{
fstring pipe_name;
struct user_creds usr;
struct ntdom_info nt;
int fd;
BOOL redirect;
BOOL initialised;
char *inbuf;
char *outbuf;
uint32 pid;
};
/* /*
* Handle database - stored per pipe. * Handle database - stored per pipe.
*/ */
@ -173,12 +157,26 @@ struct handle_list {
size_t count; size_t count;
}; };
/* Domain controller authentication protocol info */
struct dcinfo
{
DOM_CHAL clnt_chal; /* Initial challenge received from client */
DOM_CHAL srv_chal; /* Initial server challenge */
DOM_CRED clnt_cred; /* Last client credential */
DOM_CRED srv_cred; /* Last server credential */
uchar sess_key[8]; /* Session key */
uchar md4pw[16]; /* md4(machine password) */
fstring mach_acct; /* Machine name we've authenticated. */
};
typedef struct pipes_struct typedef struct pipes_struct
{ {
struct pipes_struct *next, *prev; struct pipes_struct *next, *prev;
int pnum; int pnum;
connection_struct *conn; connection_struct *conn;
uint16 vuid; uint16 vuid; /* points to the unauthenticated user that opened this pipe. */
BOOL open; /* open connection */ BOOL open; /* open connection */
uint16 device_state; uint16 device_state;
uint16 priority; uint16 priority;
@ -194,6 +192,7 @@ typedef struct pipes_struct
unsigned char challenge[8]; unsigned char challenge[8];
unsigned char ntlmssp_hash[258]; unsigned char ntlmssp_hash[258];
uint32 ntlmssp_seq_num; uint32 ntlmssp_seq_num;
struct dcinfo dc; /* Keeps the creds data. */
/* /*
* Windows user info. * Windows user info.

32
source/include/proto.h
View File

@ -159,38 +159,6 @@ BOOL message_send_all(TDB_CONTEXT *conn_tdb, int msg_type, void *buf, size_t len
int ms_fnmatch(char *pattern, char *string); int ms_fnmatch(char *pattern, char *string);
/*The following definitions come from lib/msrpc-client.c */
BOOL receive_msrpc(int fd, prs_struct *data, unsigned int timeout);
BOOL msrpc_send(int fd, prs_struct *ps);
BOOL msrpc_receive(int fd, prs_struct *ps);
BOOL msrpc_connect(struct msrpc_state *msrpc, const char *pipe_name);
void msrpc_init_creds(struct msrpc_state *msrpc, const struct user_creds *usr);
void msrpc_close_socket(struct msrpc_state *msrpc);
void msrpc_sockopt(struct msrpc_state *msrpc, char *options);
BOOL msrpc_connect_auth(struct msrpc_state *msrpc,
uint32 pid,
const char* pipename,
const struct user_creds *usr);
struct msrpc_state *msrpc_initialise(struct msrpc_state *msrpc, uint32 pid);
void msrpc_shutdown(struct msrpc_state *msrpc);
BOOL msrpc_establish_connection(struct msrpc_state *msrpc,
const char *pipe_name);
/*The following definitions come from lib/msrpc_use.c */
void init_msrpc_use(void);
void free_msrpc_use(void);
struct msrpc_state *msrpc_use_add(const char* pipe_name,
uint32 pid,
struct user_creds *usr_creds,
BOOL redir);
BOOL msrpc_use_del(const char* pipe_name,
const struct user_creds *usr_creds,
BOOL force_close,
BOOL *connection_closed);
void msrpc_net_use_enum(uint32 *num_cons, struct use_info ***use);
/*The following definitions come from lib/pidfile.c */ /*The following definitions come from lib/pidfile.c */
pid_t pidfile_pid(char *name); pid_t pidfile_pid(char *name);

13
source/include/rpc_misc.h
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@ -247,6 +247,19 @@ typedef struct log_info
} DOM_LOG_INFO; } DOM_LOG_INFO;
/* DOM_CHAL - challenge info */
typedef struct chal_info
{
uchar data[8]; /* credentials */
} DOM_CHAL;
/* DOM_CREDs - timestamped client or server credentials */
typedef struct cred_info
{
DOM_CHAL challenge; /* credentials */
UTIME timestamp; /* credential time-stamp */
} DOM_CRED;
/* DOM_CLNT_INFO - client info */ /* DOM_CLNT_INFO - client info */
typedef struct clnt_info typedef struct clnt_info
{ {

45
source/include/smb.h
View File

@ -425,25 +425,12 @@ typedef struct domain_grp_member_info
} DOMAIN_GRP_MEMBER; } DOMAIN_GRP_MEMBER;
/* DOM_CHAL - challenge info */
typedef struct chal_info
{
uchar data[8]; /* credentials */
} DOM_CHAL;
/* 32 bit time (sec) since 01jan1970 - cifs6.txt, section 3.5, page 30 */ /* 32 bit time (sec) since 01jan1970 - cifs6.txt, section 3.5, page 30 */
typedef struct time_info typedef struct time_info
{ {
uint32 time; uint32 time;
} UTIME; } UTIME;
/* DOM_CREDs - timestamped client or server credentials */
typedef struct cred_info
{
DOM_CHAL challenge; /* credentials */
UTIME timestamp; /* credential time-stamp */
} DOM_CRED;
/* Structure used when SMBwritebmpx is active */ /* Structure used when SMBwritebmpx is active */
typedef struct typedef struct
{ {
@ -581,19 +568,6 @@ struct current_user
#define EXCLUSIVE_BREAK_SENT 1 #define EXCLUSIVE_BREAK_SENT 1
#define LEVEL_II_BREAK_SENT 2 #define LEVEL_II_BREAK_SENT 2
/* Domain controller authentication protocol info */
struct dcinfo
{
DOM_CHAL clnt_chal; /* Initial challenge received from client */
DOM_CHAL srv_chal; /* Initial server challenge */
DOM_CRED clnt_cred; /* Last client credential */
DOM_CRED srv_cred; /* Last server credential */
uchar sess_key[8]; /* Session key */
uchar md4pw[16]; /* md4(machine password) */
};
typedef struct { typedef struct {
fstring smb_name; /* user name from the client */ fstring smb_name; /* user name from the client */
fstring unix_name; /* unix user name of a validated user */ fstring unix_name; /* unix user name of a validated user */
@ -1600,21 +1574,6 @@ struct pwd_info
uchar sess_key[16]; uchar sess_key[16];
}; };
struct ntdom_info
{
unsigned char sess_key[16]; /* Current session key. */
unsigned char ntlmssp_hash[258]; /* ntlmssp data. */
uint32 ntlmssp_cli_flgs; /* ntlmssp client flags */
uint32 ntlmssp_srv_flgs; /* ntlmssp server flags */
uint32 ntlmssp_seq_num; /* ntlmssp sequence number */
DOM_CRED clnt_cred; /* Client credential. */
int max_recv_frag;
int max_xmit_frag;
vuser_key key;
};
/* /*
* Network Computing Architechture Context Name Named Pipe * Network Computing Architechture Context Name Named Pipe
* See MSDN docs for more information * See MSDN docs for more information
@ -1648,10 +1607,6 @@ typedef struct user_struct
gid_t *groups; gid_t *groups;
NT_USER_TOKEN *nt_user_token; NT_USER_TOKEN *nt_user_token;
/* per-user authentication information on NT RPCs */
/* lkclXXXX - THIS SHOULD NOT BE HERE! */
struct dcinfo dc;
} user_struct; } user_struct;
#include "ntdomain.h" #include "ntdomain.h"

86
source/rpc_server/srv_netlog_nt.c
View File

@ -150,6 +150,8 @@ static BOOL get_md4pw(char *md4pw, char *mach_acct)
} }
#endif /* 0 */ #endif /* 0 */
/* JRA. This is ok as it is only used for generating the challenge. */
become_root(); become_root();
sampass = pdb_getsampwnam(mach_acct); sampass = pdb_getsampwnam(mach_acct);
unbecome_root(); unbecome_root();
@ -175,10 +177,9 @@ uint32 _net_req_chal(pipes_struct *p, NET_Q_REQ_CHAL *q_u, NET_R_REQ_CHAL *r_u)
{ {
uint32 status = NT_STATUS_NOPROBLEMO; uint32 status = NT_STATUS_NOPROBLEMO;
fstring mach_acct; fstring mach_acct;
user_struct *vuser;
if ((vuser = get_valid_user_struct(p->vuid)) == NULL) if (!get_valid_user_struct(p->vuid))
return False; return NT_STATUS_NO_SUCH_USER;
fstrcpy(mach_acct, dos_unistrn2(q_u->uni_logon_clnt.buffer, fstrcpy(mach_acct, dos_unistrn2(q_u->uni_logon_clnt.buffer,
q_u->uni_logon_clnt.uni_str_len)); q_u->uni_logon_clnt.uni_str_len));
@ -186,29 +187,33 @@ uint32 _net_req_chal(pipes_struct *p, NET_Q_REQ_CHAL *q_u, NET_R_REQ_CHAL *r_u)
strlower(mach_acct); strlower(mach_acct);
fstrcat(mach_acct, "$"); fstrcat(mach_acct, "$");
if (get_md4pw((char *)vuser->dc.md4pw, mach_acct)) { if (get_md4pw((char *)p->dc.md4pw, mach_acct)) {
/* copy the client credentials */ /* copy the client credentials */
memcpy(vuser->dc.clnt_chal.data , q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data)); memcpy(p->dc.clnt_chal.data , q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
memcpy(vuser->dc.clnt_cred.challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data)); memcpy(p->dc.clnt_cred.challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
/* create a server challenge for the client */ /* create a server challenge for the client */
/* Set these to random values. */ /* Set these to random values. */
generate_random_buffer(vuser->dc.srv_chal.data, 8, False); generate_random_buffer(p->dc.srv_chal.data, 8, False);
memcpy(vuser->dc.srv_cred.challenge.data, vuser->dc.srv_chal.data, 8); memcpy(p->dc.srv_cred.challenge.data, p->dc.srv_chal.data, 8);
memset((char *)vuser->dc.sess_key, '\0', sizeof(vuser->dc.sess_key)); memset((char *)p->dc.sess_key, '\0', sizeof(p->dc.sess_key));
/* from client / server challenges and md4 password, generate sess key */ /* from client / server challenges and md4 password, generate sess key */
cred_session_key(&vuser->dc.clnt_chal, &vuser->dc.srv_chal, cred_session_key(&p->dc.clnt_chal, &p->dc.srv_chal,
(char *)vuser->dc.md4pw, vuser->dc.sess_key); (char *)p->dc.md4pw, p->dc.sess_key);
/* Save the machine account name. */
fstrcpy(p->dc.mach_acct, mach_acct);
} else { } else {
/* lkclXXXX take a guess at a good error message to return :-) */ /* lkclXXXX take a guess at a good error message to return :-) */
status = NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT; status = NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
} }
/* set up the LSA REQUEST CHALLENGE response */ /* set up the LSA REQUEST CHALLENGE response */
init_net_r_req_chal(r_u, &vuser->dc.srv_chal, status); init_net_r_req_chal(r_u, &p->dc.srv_chal, status);
return r_u->status; return r_u->status;
} }
@ -223,22 +228,21 @@ uint32 _net_auth_2(pipes_struct *p, NET_Q_AUTH_2 *q_u, NET_R_AUTH_2 *r_u)
DOM_CHAL srv_cred; DOM_CHAL srv_cred;
UTIME srv_time; UTIME srv_time;
NEG_FLAGS srv_flgs; NEG_FLAGS srv_flgs;
user_struct *vuser;
if ((vuser = get_valid_user_struct(p->vuid)) == NULL) if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER; return NT_STATUS_NO_SUCH_USER;
srv_time.time = 0; srv_time.time = 0;
/* check that the client credentials are valid */ /* check that the client credentials are valid */
if (cred_assert(&q_u->clnt_chal, vuser->dc.sess_key, &vuser->dc.clnt_cred.challenge, srv_time)) { if (cred_assert(&q_u->clnt_chal, p->dc.sess_key, &p->dc.clnt_cred.challenge, srv_time)) {
/* create server challenge for inclusion in the reply */ /* create server challenge for inclusion in the reply */
cred_create(vuser->dc.sess_key, &vuser->dc.srv_cred.challenge, srv_time, &srv_cred); cred_create(p->dc.sess_key, &p->dc.srv_cred.challenge, srv_time, &srv_cred);
/* copy the received client credentials for use next time */ /* copy the received client credentials for use next time */
memcpy(vuser->dc.clnt_cred.challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data)); memcpy(p->dc.clnt_cred.challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
memcpy(vuser->dc.srv_cred .challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data)); memcpy(p->dc.srv_cred .challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
} else { } else {
status = NT_STATUS_ACCESS_DENIED; status = NT_STATUS_ACCESS_DENIED;
} }
@ -257,24 +261,22 @@ uint32 _net_auth_2(pipes_struct *p, NET_Q_AUTH_2 *q_u, NET_R_AUTH_2 *r_u)
uint32 _net_srv_pwset(pipes_struct *p, NET_Q_SRV_PWSET *q_u, NET_R_SRV_PWSET *r_u) uint32 _net_srv_pwset(pipes_struct *p, NET_Q_SRV_PWSET *q_u, NET_R_SRV_PWSET *r_u)
{ {
uint16 vuid = p->vuid;
uint32 status = NT_STATUS_WRONG_PASSWORD; uint32 status = NT_STATUS_WRONG_PASSWORD;
DOM_CRED srv_cred; DOM_CRED srv_cred;
pstring mach_acct; pstring mach_acct;
SAM_ACCOUNT *sampass; SAM_ACCOUNT *sampass;
BOOL ret = False; BOOL ret = False;
user_struct *vuser;
unsigned char pwd[16]; unsigned char pwd[16];
int i; int i;
if ((vuser = get_valid_user_struct(vuid)) == NULL) if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER; return NT_STATUS_NO_SUCH_USER;
/* checks and updates credentials. creates reply credentials */ /* checks and updates credentials. creates reply credentials */
if (!deal_with_creds(vuser->dc.sess_key, &vuser->dc.clnt_cred, &q_u->clnt_id.cred, &srv_cred)) if (!deal_with_creds(p->dc.sess_key, &p->dc.clnt_cred, &q_u->clnt_id.cred, &srv_cred))
return NT_STATUS_INVALID_HANDLE; return NT_STATUS_INVALID_HANDLE;
memcpy(&vuser->dc.srv_cred, &vuser->dc.clnt_cred, sizeof(vuser->dc.clnt_cred)); memcpy(&p->dc.srv_cred, &p->dc.clnt_cred, sizeof(p->dc.clnt_cred));
DEBUG(5,("_net_srv_pwset: %d\n", __LINE__)); DEBUG(5,("_net_srv_pwset: %d\n", __LINE__));
@ -287,15 +289,27 @@ uint32 _net_srv_pwset(pipes_struct *p, NET_Q_SRV_PWSET *q_u, NET_R_SRV_PWSET *r_
sampass = pdb_getsampwnam(mach_acct); sampass = pdb_getsampwnam(mach_acct);
unbecome_root(); unbecome_root();
if (sampass == NULL) /* Ensure the account exists and is a machine account. */
if (sampass == NULL || !(pdb_get_acct_ctrl(sampass) & ACB_WSTRUST))
return NT_STATUS_NO_SUCH_USER; return NT_STATUS_NO_SUCH_USER;
/*
* Check the machine account name we're changing is the same
* as the one we've authenticated from. This prevents arbitrary
* machines changing other machine account passwords.
*/
if (!strequal(mach_acct, p->dc.mach_acct))
return NT_STATUS_ACCESS_DENIED;
DEBUG(100,("Server password set : new given value was :\n")); DEBUG(100,("Server password set : new given value was :\n"));
for(i = 0; i < 16; i++) for(i = 0; i < 16; i++)
DEBUG(100,("%02X ", q_u->pwd[i])); DEBUG(100,("%02X ", q_u->pwd[i]));
DEBUG(100,("\n")); DEBUG(100,("\n"));
cred_hash3( pwd, q_u->pwd, vuser->dc.sess_key, 0); cred_hash3( pwd, q_u->pwd, p->dc.sess_key, 0);
/* lies! nt and lm passwords are _not_ the same: don't care */ /* lies! nt and lm passwords are _not_ the same: don't care */
pdb_set_lanman_passwd (sampass, pwd); pdb_set_lanman_passwd (sampass, pwd);
@ -324,17 +338,15 @@ uint32 _net_sam_logoff(pipes_struct *p, NET_Q_SAM_LOGOFF *q_u, NET_R_SAM_LOGOFF
{ {
DOM_CRED srv_cred; DOM_CRED srv_cred;
user_struct *vuser; if (!get_valid_user_struct(p->vuid))
if ((vuser = get_valid_user_struct(p->vuid)) == NULL)
return NT_STATUS_NO_SUCH_USER; return NT_STATUS_NO_SUCH_USER;
/* checks and updates credentials. creates reply credentials */ /* checks and updates credentials. creates reply credentials */
if (!deal_with_creds(vuser->dc.sess_key, &vuser->dc.clnt_cred, if (!deal_with_creds(p->dc.sess_key, &p->dc.clnt_cred,
&q_u->sam_id.client.cred, &srv_cred)) &q_u->sam_id.client.cred, &srv_cred))
return NT_STATUS_INVALID_HANDLE; return NT_STATUS_INVALID_HANDLE;
memcpy(&vuser->dc.srv_cred, &vuser->dc.clnt_cred, sizeof(vuser->dc.clnt_cred)); memcpy(&p->dc.srv_cred, &p->dc.clnt_cred, sizeof(p->dc.clnt_cred));
/* XXXX maybe we want to say 'no', reject the client's credentials */ /* XXXX maybe we want to say 'no', reject the client's credentials */
r_u->buffer_creds = 1; /* yes, we have valid server credentials */ r_u->buffer_creds = 1; /* yes, we have valid server credentials */
@ -349,7 +361,7 @@ uint32 _net_sam_logoff(pipes_struct *p, NET_Q_SAM_LOGOFF *q_u, NET_R_SAM_LOGOFF
net_login_interactive: net_login_interactive:
*************************************************************************/ *************************************************************************/
static uint32 net_login_interactive(NET_ID_INFO_1 *id1, SAM_ACCOUNT *sampass, user_struct *vuser) static uint32 net_login_interactive(NET_ID_INFO_1 *id1, SAM_ACCOUNT *sampass, pipes_struct *p)
{ {
uint32 status = 0x0; uint32 status = 0x0;
@ -358,7 +370,7 @@ static uint32 net_login_interactive(NET_ID_INFO_1 *id1, SAM_ACCOUNT *sampass, us
unsigned char key[16]; unsigned char key[16];
memset(key, 0, 16); memset(key, 0, 16);
memcpy(key, vuser->dc.sess_key, 8); memcpy(key, p->dc.sess_key, 8);
memcpy(lm_pwd, id1->lm_owf.data, 16); memcpy(lm_pwd, id1->lm_owf.data, 16);
memcpy(nt_pwd, id1->nt_owf.data, 16); memcpy(nt_pwd, id1->nt_owf.data, 16);
@ -444,28 +456,26 @@ static uint32 net_login_network(NET_ID_INFO_2 *id2, SAM_ACCOUNT *sampass)
uint32 _net_sam_logon(pipes_struct *p, NET_Q_SAM_LOGON *q_u, NET_R_SAM_LOGON *r_u) uint32 _net_sam_logon(pipes_struct *p, NET_Q_SAM_LOGON *q_u, NET_R_SAM_LOGON *r_u)
{ {
uint32 status = NT_STATUS_NOPROBLEMO; uint32 status = NT_STATUS_NOPROBLEMO;
uint16 vuid = p->vuid;
NET_USER_INFO_3 *usr_info = NULL; NET_USER_INFO_3 *usr_info = NULL;
DOM_CRED srv_cred; DOM_CRED srv_cred;
SAM_ACCOUNT *sampass = NULL; SAM_ACCOUNT *sampass = NULL;
uint16 acct_ctrl; uint16 acct_ctrl;
UNISTR2 *uni_samlogon_user = NULL; UNISTR2 *uni_samlogon_user = NULL;
fstring nt_username; fstring nt_username;
user_struct *vuser = NULL;
usr_info = (NET_USER_INFO_3 *)talloc(p->mem_ctx, sizeof(NET_USER_INFO_3)); usr_info = (NET_USER_INFO_3 *)talloc(p->mem_ctx, sizeof(NET_USER_INFO_3));
if (!usr_info) if (!usr_info)
return NT_STATUS_NO_MEMORY; return NT_STATUS_NO_MEMORY;
ZERO_STRUCTP(usr_info); ZERO_STRUCTP(usr_info);
if ((vuser = get_valid_user_struct(vuid)) == NULL) if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER; return NT_STATUS_NO_SUCH_USER;
/* checks and updates credentials. creates reply credentials */ /* checks and updates credentials. creates reply credentials */
if (!deal_with_creds(vuser->dc.sess_key, &vuser->dc.clnt_cred, &q_u->sam_id.client.cred, &srv_cred)) if (!deal_with_creds(p->dc.sess_key, &p->dc.clnt_cred, &q_u->sam_id.client.cred, &srv_cred))
return NT_STATUS_INVALID_HANDLE; return NT_STATUS_INVALID_HANDLE;
else else
memcpy(&vuser->dc.srv_cred, &vuser->dc.clnt_cred, sizeof(vuser->dc.clnt_cred)); memcpy(&p->dc.srv_cred, &p->dc.clnt_cred, sizeof(p->dc.clnt_cred));
/* find the username */ /* find the username */
@ -516,7 +526,7 @@ uint32 _net_sam_logon(pipes_struct *p, NET_Q_SAM_LOGON *q_u, NET_R_SAM_LOGON *r_
switch (q_u->sam_id.logon_level) { switch (q_u->sam_id.logon_level) {
case INTERACTIVE_LOGON_TYPE: case INTERACTIVE_LOGON_TYPE:
/* interactive login. */ /* interactive login. */
status = net_login_interactive(&q_u->sam_id.ctr->auth.id1, sampass, vuser); status = net_login_interactive(&q_u->sam_id.ctr->auth.id1, sampass, p);
break; break;
case NET_LOGON_TYPE: case NET_LOGON_TYPE:
/* network login. lm challenge and 24 byte responses */ /* network login. lm challenge and 24 byte responses */

2
source/smbd/password.c
View File

@ -313,8 +313,6 @@ uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name,
} }
} }
memset(&vuser->dc, '\0', sizeof(vuser->dc));
return vuser->vuid; return vuser->vuid;
} }