diff options
Diffstat (limited to 'source3/smbd/auth_util.c')
| -rw-r--r-- | source3/smbd/auth_util.c | 564 |
1 files changed, 543 insertions, 21 deletions
diff --git a/source3/smbd/auth_util.c b/source3/smbd/auth_util.c index d3b9aa7001..297c482af5 100644 --- a/source3/smbd/auth_util.c +++ b/source3/smbd/auth_util.c @@ -25,6 +25,8 @@ /* Data to do lanman1/2 password challenge. */ static unsigned char saved_challenge[8]; static BOOL challenge_sent=False; +extern fstring remote_machine; +extern pstring global_myname; /******************************************************************* Get the next challenge value - no repeats. @@ -64,7 +66,7 @@ BOOL last_challenge(unsigned char *challenge) Create a UNIX user on demand. ****************************************************************************/ -static int smb_create_user(char *unix_user, char *homedir) +static int smb_create_user(const char *unix_user, const char *homedir) { pstring add_script; int ret; @@ -100,40 +102,560 @@ static int smb_delete_user(char *unix_user) Add and Delete UNIX users on demand, based on NTSTATUS codes. ****************************************************************************/ -void smb_user_control(char *unix_user, NTSTATUS nt_status) +void smb_user_control(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info, NTSTATUS nt_status) { struct passwd *pwd=NULL; if (NT_STATUS_IS_OK(nt_status)) { - /* - * User validated ok against Domain controller. - * If the admin wants us to try and create a UNIX - * user on the fly, do so. - */ - if(lp_adduser_script() && !(pwd = smb_getpwnam(unix_user,True))) - smb_create_user(unix_user, NULL); - - if(lp_adduser_script() && pwd) { - SMB_STRUCT_STAT st; + if (!(server_info->sam_fill_level & SAM_FILL_UNIX)) { + /* - * Also call smb_create_user if the users home directory - * doesn't exist. Used with winbindd to allow the script to - * create the home directory for a user mapped with winbindd. + * User validated ok against Domain controller. + * If the admin wants us to try and create a UNIX + * user on the fly, do so. */ + + if(lp_adduser_script() && !(pwd = Get_Pwnam(user_info->internal_username.str))) { + smb_create_user(user_info->internal_username.str, NULL); + } + } else { + if(lp_adduser_script()) { + SMB_STRUCT_STAT st; + const char *home_dir = pdb_get_homedir(server_info->sam_account); + /* + * Also call smb_create_user if the users home directory + * doesn't exist. Used with winbindd to allow the script to + * create the home directory for a user mapped with winbindd. + */ - if (pwd->pw_dir && (sys_stat(pwd->pw_dir, &st) == -1) && (errno == ENOENT)) - smb_create_user(unix_user, pwd->pw_dir); + if (home_dir && + (sys_stat(home_dir, &st) == -1) && (errno == ENOENT)) { + smb_create_user(user_info->internal_username.str, home_dir); + } + } } - - } else if (NT_STATUS_V(nt_status) == NT_STATUS_V(NT_STATUS_NO_SUCH_USER)) { + } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) { /* * User failed to validate ok against Domain controller. * If the failure was "user doesn't exist" and admin * wants us to try and delete that UNIX user on the fly, * do so. */ - if(lp_deluser_script() && smb_getpwnam(unix_user,True)) - smb_delete_user(unix_user); + if (lp_deluser_script()) { + smb_delete_user(user_info->internal_username.str); + } + } +} + +/**************************************************************************** + Create an auth_usersupplied_data structure +****************************************************************************/ + +BOOL make_user_info(auth_usersupplied_info **user_info, + char *smb_name, char *internal_username, + char *client_domain, char *domain, + char *wksta_name, DATA_BLOB sec_blob, + DATA_BLOB lm_pwd, DATA_BLOB nt_pwd, + DATA_BLOB plaintext, + uint32 ntlmssp_flags, BOOL encrypted) +{ + + DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name)); + + *user_info = malloc(sizeof(**user_info)); + if (!user_info) { + DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info))); + return False; + } + + ZERO_STRUCTP(*user_info); + + DEBUG(5,("makeing strings for %s's user_info struct\n", internal_username)); + + (*user_info)->smb_name.str = strdup(smb_name); + if ((*user_info)->smb_name.str) { + (*user_info)->smb_name.len = strlen(smb_name); + } else { + free_user_info(user_info); + return False; + } + + (*user_info)->internal_username.str = strdup(internal_username); + if ((*user_info)->internal_username.str) { + (*user_info)->internal_username.len = strlen(internal_username); + } else { + free_user_info(user_info); + return False; + } + + (*user_info)->domain.str = strdup(domain); + if ((*user_info)->domain.str) { + (*user_info)->domain.len = strlen(domain); + } else { + free_user_info(user_info); + return False; + } + + (*user_info)->client_domain.str = strdup(client_domain); + if ((*user_info)->client_domain.str) { + (*user_info)->client_domain.len = strlen(client_domain); + } else { + free_user_info(user_info); + return False; + } + + (*user_info)->wksta_name.str = strdup(wksta_name); + if ((*user_info)->wksta_name.str) { + (*user_info)->wksta_name.len = strlen(wksta_name); + } else { + free_user_info(user_info); + return False; } + + DEBUG(5,("makeing blobs for %s's user_info struct\n", internal_username)); + + (*user_info)->sec_blob = data_blob(sec_blob.data, sec_blob.length); + (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length); + (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length); + (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length); + + (*user_info)->encrypted = encrypted; + (*user_info)->ntlmssp_flags = ntlmssp_flags; + + DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name)); + + return True; } + +/**************************************************************************** + Create an auth_usersupplied_data structure after appropriate mapping. +****************************************************************************/ + +BOOL make_user_info_map(auth_usersupplied_info **user_info, + char *smb_name, + char *client_domain, + char *wksta_name, DATA_BLOB sec_blob, + DATA_BLOB lm_pwd, DATA_BLOB nt_pwd, + DATA_BLOB plaintext, + uint32 ntlmssp_flags, BOOL encrypted) +{ + char *domain; + fstring internal_username; + fstrcpy(internal_username, smb_name); + map_username(internal_username); + + if (lp_allow_trusted_domains()) { + domain = client_domain; + } else { + domain = lp_workgroup(); + } + + return make_user_info(user_info, + smb_name, internal_username, + client_domain, domain, + wksta_name, sec_blob, + lm_pwd, nt_pwd, + plaintext, + ntlmssp_flags, encrypted); + +} + +/**************************************************************************** + Create an auth_usersupplied_data, making the DATA_BLOBs here. + Decrupt and encrypt the passwords. +****************************************************************************/ + +BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info, + char *smb_name, + char *client_domain, + char *wksta_name, uchar chal[8], + uchar *lm_network_pwd, int lm_pwd_len, + uchar *nt_network_pwd, int nt_pwd_len) +{ + BOOL ret; + DATA_BLOB sec_blob = data_blob(chal, sizeof(chal)); + DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len); + DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len); + DATA_BLOB plaintext_blob = data_blob(NULL, 0); + uint32 ntlmssp_flags = 0; + + if (lm_pwd_len) + ntlmssp_flags |= NTLMSSP_NEGOTIATE_OEM; + if (nt_pwd_len) + ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM; + + ret = make_user_info_map(user_info, + smb_name, client_domain, + wksta_name, sec_blob, + nt_blob, lm_blob, + plaintext_blob, + ntlmssp_flags, True); + + data_blob_free(&lm_blob); + data_blob_free(&nt_blob); + return ret; +} + +/**************************************************************************** + Create an auth_usersupplied_data, making the DATA_BLOBs here. + Decrupt and encrypt the passwords. +****************************************************************************/ + +BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info, + char *smb_name, + char *client_domain, + char *wksta_name, + uchar *lm_interactive_pwd, int lm_pwd_len, + uchar *nt_interactive_pwd, int nt_pwd_len, + uchar *dc_sess_key) +{ + char nt_pwd[16]; + char lm_pwd[16]; + unsigned char local_lm_response[24]; + unsigned char local_nt_response[24]; + unsigned char key[16]; + uint8 chal[8]; + uint32 ntlmssp_flags = 0; + + generate_random_buffer(chal, 8, False); + + memset(key, 0, 16); + memcpy(key, dc_sess_key, 8); + + memcpy(lm_pwd, lm_interactive_pwd, 16); + memcpy(nt_pwd, nt_interactive_pwd, 16); + +#ifdef DEBUG_PASSWORD + DEBUG(100,("key:")); + dump_data(100, (char *)key, 16); + + DEBUG(100,("lm owf password:")); + dump_data(100, lm_pwd, 16); + + DEBUG(100,("nt owf password:")); + dump_data(100, nt_pwd, 16); +#endif + + SamOEMhash((uchar *)lm_pwd, key, 16); + SamOEMhash((uchar *)nt_pwd, key, 16); + +#ifdef DEBUG_PASSWORD + DEBUG(100,("decrypt of lm owf password:")); + dump_data(100, lm_pwd, 16); + + DEBUG(100,("decrypt of nt owf password:")); + dump_data(100, nt_pwd, 16); +#endif + + generate_random_buffer(chal, 8, False); + SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response); + SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response); + + /* Password info parinoia */ + ZERO_STRUCT(lm_pwd); + ZERO_STRUCT(nt_pwd); + ZERO_STRUCT(key); + + { + BOOL ret; + DATA_BLOB sec_blob = data_blob(chal, sizeof(chal)); + DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response)); + DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response)); + DATA_BLOB plaintext_blob = data_blob(NULL, 0); + + ntlmssp_flags = NTLMSSP_NEGOTIATE_OEM | NTLMSSP_NEGOTIATE_NTLM; + ret = make_user_info_map(user_info, + smb_name, client_domain, + wksta_name, sec_blob, + local_nt_blob, + local_lm_blob, + plaintext_blob, + ntlmssp_flags, True); + + data_blob_free(&local_lm_blob); + data_blob_free(&local_nt_blob); + return ret; + } +} + +/**************************************************************************** + Create an auth_usersupplied_data structure +****************************************************************************/ + +BOOL make_user_info_for_winbind(auth_usersupplied_info **user_info, + char *username, + char *domain, + char *password) +{ + unsigned char local_lm_response[24]; + unsigned char local_nt_response[24]; + char chal[8]; + DATA_BLOB local_lm_blob; + DATA_BLOB local_nt_blob; + DATA_BLOB plaintext_blob; + uint32 ntlmssp_flags = 0; + + /* + * Not encrypted - do so. + */ + + DEBUG(5,("pass_check_smb: User passwords not in encrypted format.\n")); + + generate_random_buffer(chal, 8, False); + + if (*password) { + SMBencrypt( (uchar *)password, chal, local_lm_response); + + /* This encrypts the lm_pwd feild, which actualy contains the password + rather than the nt_pwd field becouse that contains nothing */ + + /* WATCH OUT. This doesn't work if the incoming password is incorrectly cased. + We might want to add a check here and only do an LM in that case */ + + SMBNTencrypt((uchar *)password, chal, local_nt_response); + + local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response)); + local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response)); + plaintext_blob = data_blob(password, strlen(password)+1); + if ((!local_lm_blob.data) || (!local_nt_blob.data)|| (!plaintext_blob.data)) { + data_blob_free(&local_lm_blob); + data_blob_free(&local_nt_blob); + data_blob_clear_free(&plaintext_blob); + return False; + } + ntlmssp_flags = NTLMSSP_NEGOTIATE_OEM | NTLMSSP_NEGOTIATE_NTLM; + } else { + local_lm_blob = data_blob(NULL, 0); + local_nt_blob = data_blob(NULL, 0); + plaintext_blob = data_blob(NULL, 0); + } + + { + BOOL ret; + DATA_BLOB sec_blob = data_blob(chal, sizeof(chal)); + + if (!sec_blob.data) { + return False; + } + + ret = make_user_info(user_info, + username, username, + domain, domain, + global_myname, sec_blob, + local_nt_blob, + local_lm_blob, + plaintext_blob, + ntlmssp_flags, False); + + data_blob_free(&local_lm_blob); + data_blob_free(&local_nt_blob); + data_blob_clear_free(&plaintext_blob); + return ret; + } +} + +/**************************************************************************** + Create an auth_usersupplied_data, making the DATA_BLOBs here. + Decrupt and encrypt the passwords. +****************************************************************************/ + +BOOL make_user_info_winbind_crap(auth_usersupplied_info **user_info, + char *smb_name, + char *client_domain, + uchar chal[8], + uchar *lm_network_pwd, int lm_pwd_len, + uchar *nt_network_pwd, int nt_pwd_len) +{ + BOOL ret; + DATA_BLOB sec_blob = data_blob(chal, sizeof(chal)); + DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len); + DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len); + DATA_BLOB plaintext_blob = data_blob(NULL, 0); + uint32 ntlmssp_flags = 0; + + if (lm_pwd_len) + ntlmssp_flags |= NTLMSSP_NEGOTIATE_OEM; + if (nt_pwd_len) + ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM; + + ret = make_user_info(user_info, + smb_name, smb_name, + client_domain, client_domain, + global_myname, sec_blob, + nt_blob, lm_blob, + plaintext_blob, + ntlmssp_flags, True); + + data_blob_free(&lm_blob); + data_blob_free(&nt_blob); + return ret; +} + +/**************************************************************************** + Create an auth_usersupplied_data structure +****************************************************************************/ + +BOOL make_user_info_for_reply(auth_usersupplied_info **user_info, + char *smb_name, + char *client_domain, + DATA_BLOB lm_resp, DATA_BLOB nt_resp, + DATA_BLOB plaintext_password, + BOOL encrypted) +{ + uchar chal[8]; + + DATA_BLOB local_lm_blob; + DATA_BLOB local_nt_blob; + DATA_BLOB sec_blob; + BOOL ret = False; + uint32 ntlmssp_flags = 0; + + if (encrypted) { + DATA_BLOB no_plaintext_blob = data_blob(NULL, 0); + if (!last_challenge(chal)) { + DEBUG(0,("Encrypted login but no challange set!\n")); + return False; + } + sec_blob = data_blob(chal, 8); + + if (lm_resp.length == 24) { + ntlmssp_flags |= NTLMSSP_NEGOTIATE_OEM; + } + if (nt_resp.length == 0) { + } else if (nt_resp.length == 24) { + ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM; + } else { + ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM2; + } + + return make_user_info_map(user_info, smb_name, + client_domain, + remote_machine, sec_blob, + lm_resp, + nt_resp, + no_plaintext_blob, + ntlmssp_flags, encrypted); + } + + generate_random_buffer(chal, 8, False); + + sec_blob = data_blob(chal, 8); + + /* + * Not encrypted - do so. + */ + + DEBUG(5,("pass_check_smb: User passwords not in encrypted format.\n")); + + if (plaintext_password.data) { + unsigned char local_lm_response[24]; + + SMBencrypt( (uchar *)plaintext_password.data, chal, local_lm_response); + local_lm_blob = data_blob(local_lm_response, 24); + + /* We can't do an NT hash here, as the password needs to be case insensitive */ + local_nt_blob = data_blob(NULL, 0); + + ntlmssp_flags = NTLMSSP_NEGOTIATE_OEM; + } else { + local_lm_blob = data_blob(NULL, 0); + local_nt_blob = data_blob(NULL, 0); + } + + ret = make_user_info_map(user_info, smb_name, + client_domain, + remote_machine, + sec_blob, + local_lm_blob, + local_nt_blob, + plaintext_password, + ntlmssp_flags, encrypted); + + data_blob_free(&local_lm_blob); + return ret; +} + +BOOL make_server_info(auth_serversupplied_info **server_info) +{ + *server_info = malloc(sizeof(**server_info)); + if (!*server_info) { + DEBUG(0,("make_server_info_sam: malloc failed!\n")); + return False; + } + ZERO_STRUCTP(*server_info); + return True; +} + +BOOL make_server_info_sam(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass) +{ + if (!make_server_info(server_info)) { + return False; + } + + (*server_info)->sam_fill_level = SAM_FILL_ALL; + (*server_info)->sam_account = sampass; + + DEBUG(5,("make_server_info_sam: made sever info for user %s\n", + pdb_get_username((*server_info)->sam_account))); + return True; +} + +BOOL make_server_info_pw(auth_serversupplied_info **server_info, struct passwd *pwd) +{ + SAM_ACCOUNT *sampass = NULL; + if (!pdb_init_sam_pw(&sampass, pwd)) { + return False; + } + return make_server_info_sam(server_info, sampass); +} + +void free_user_info(auth_usersupplied_info **user_info) +{ + DEBUG(5,("attempting to free (and zero) a user_info structure\n")); + if (*user_info != NULL) { + if ((*user_info)->smb_name.str) { + DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str)); + } + SAFE_FREE((*user_info)->smb_name.str); + SAFE_FREE((*user_info)->internal_username.str); + SAFE_FREE((*user_info)->client_domain.str); + SAFE_FREE((*user_info)->domain.str); + data_blob_free(&(*user_info)->sec_blob); + data_blob_free(&(*user_info)->lm_resp); + data_blob_free(&(*user_info)->nt_resp); + SAFE_FREE((*user_info)->interactive_password); + data_blob_clear_free(&(*user_info)->plaintext_password); + ZERO_STRUCT(**user_info); + } + SAFE_FREE(*user_info); +} + +/*************************************************************************** + Clear out a server_info struct that has been allocated +***************************************************************************/ +void free_server_info(auth_serversupplied_info **server_info) +{ + if (*server_info != NULL) { + pdb_free_sam(&(*server_info)->sam_account); + + /* call pam_end here, unless we know we are keeping it */ + SAFE_FREE((*server_info)->group_rids); + + ZERO_STRUCT(**server_info); + } + SAFE_FREE(*server_info); +} + +/*************************************************************************** + Make a server_info struct for a guest user +***************************************************************************/ +void make_server_info_guest(auth_serversupplied_info **server_info) +{ + struct passwd *pass = sys_getpwnam(lp_guestaccount(-1)); + + if (pass) { + make_server_info_pw(server_info, pass); + } +} + |