+++ /dev/null
-/*
- Unix SMB/Netbios implementation.
- Version 3.0
- handle NLTMSSP, server side
-
- Copyright (C) Andrew Tridgell 2001
- Copyright (C) Andrew Bartlett 2001-2010
- Copyright (C) Stefan Metzmacher 2005
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "../auth/ntlmssp/ntlmssp.h"
-#include "../auth/ntlmssp/ntlmssp_private.h"
-#include "../libcli/auth/libcli_auth.h"
-#include "../librpc/gen_ndr/ndr_ntlmssp.h"
-#include "../auth/ntlmssp/ntlmssp_ndr.h"
-#include "../lib/crypto/md5.h"
-#include "../lib/crypto/arcfour.h"
-#include "../lib/crypto/hmacmd5.h"
-#include "../nsswitch/libwbclient/wbclient.h"
-
-static NTSTATUS ntlmssp3_client_initial(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- DATA_BLOB reply, DATA_BLOB *next_request);
-static NTSTATUS ntlmssp3_client_challenge(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx, /* Unused at this time */
- const DATA_BLOB reply, DATA_BLOB *next_request);
-/**
- * Callbacks for NTLMSSP - for both client and server operating modes
- *
- */
-
-static const struct ntlmssp_callbacks {
- enum ntlmssp_role role;
- enum ntlmssp_message_type ntlmssp_command;
- NTSTATUS (*fn)(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- DATA_BLOB in, DATA_BLOB *out);
-} ntlmssp_callbacks[] = {
- {NTLMSSP_CLIENT, NTLMSSP_INITIAL, ntlmssp3_client_initial},
- {NTLMSSP_CLIENT, NTLMSSP_CHALLENGE, ntlmssp3_client_challenge},
- {NTLMSSP_CLIENT, NTLMSSP_UNKNOWN, NULL},
- {NTLMSSP_SERVER, NTLMSSP_UNKNOWN, NULL}
-};
-
-/**
- * Set a username on an NTLMSSP context - ensures it is talloc()ed
- *
- */
-
-NTSTATUS ntlmssp_set_username(struct ntlmssp_state *ntlmssp_state, const char *user)
-{
- ntlmssp_state->user = talloc_strdup(ntlmssp_state, user ? user : "" );
- if (!ntlmssp_state->user) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Converts a password to the hashes on an NTLMSSP context.
- *
- */
-NTSTATUS ntlmssp_set_password(struct ntlmssp_state *ntlmssp_state, const char *password)
-{
- uint8_t lm_hash[16];
- uint8_t nt_hash[16];
-
- TALLOC_FREE(ntlmssp_state->lm_hash);
- TALLOC_FREE(ntlmssp_state->nt_hash);
-
- if (password == NULL) {
- return NT_STATUS_OK;
- }
-
- if (E_deshash(password, lm_hash)) {
- ntlmssp_state->lm_hash = (uint8_t *)
- talloc_memdup(ntlmssp_state, lm_hash, 16);
- if (!ntlmssp_state->lm_hash) {
- return NT_STATUS_NO_MEMORY;
- }
- }
-
- E_md4hash(password, nt_hash);
-
- ntlmssp_state->nt_hash = (uint8_t *)
- talloc_memdup(ntlmssp_state, nt_hash, 16);
- if (!ntlmssp_state->nt_hash) {
- TALLOC_FREE(ntlmssp_state->lm_hash);
- return NT_STATUS_NO_MEMORY;
- }
-
- return NT_STATUS_OK;
-}
-
-NTSTATUS ntlmssp_set_password_hash(struct ntlmssp_state *state,
- const char *pwhash)
-{
- char nt_hash[16];
- size_t converted;
-
- converted = strhex_to_str(
- nt_hash, sizeof(nt_hash), pwhash, strlen(pwhash));
- if (converted != sizeof(nt_hash)) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- TALLOC_FREE(state->lm_hash);
- TALLOC_FREE(state->nt_hash);
-
- state->nt_hash = (uint8_t *)talloc_memdup(state, nt_hash, 16);
- if (!state->nt_hash) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Set a domain on an NTLMSSP context - ensures it is talloc()ed
- *
- */
-NTSTATUS ntlmssp_set_domain(struct ntlmssp_state *ntlmssp_state, const char *domain)
-{
- ntlmssp_state->domain = talloc_strdup(ntlmssp_state,
- domain ? domain : "" );
- if (!ntlmssp_state->domain) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Request features for the NTLMSSP negotiation
- *
- * @param ntlmssp_state NTLMSSP state
- * @param feature_list List of space separated features requested from NTLMSSP.
- */
-void ntlmssp_want_feature_list(struct ntlmssp_state *ntlmssp_state, char *feature_list)
-{
- /*
- * We need to set this to allow a later SetPassword
- * via the SAMR pipe to succeed. Strange.... We could
- * also add NTLMSSP_NEGOTIATE_SEAL here. JRA.
- */
- if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, True)) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
- }
- if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, True)) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
- }
- if(in_list("NTLMSSP_FEATURE_SEAL", feature_list, True)) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
- }
- if (in_list("NTLMSSP_FEATURE_CCACHE", feature_list, true)) {
- ntlmssp_state->use_ccache = true;
- }
-}
-
-/**
- * Request a feature for the NTLMSSP negotiation
- *
- * @param ntlmssp_state NTLMSSP state
- * @param feature Bit flag specifying the requested feature
- */
-void ntlmssp_want_feature(struct ntlmssp_state *ntlmssp_state, uint32_t feature)
-{
- /* As per JRA's comment above */
- if (feature & NTLMSSP_FEATURE_SESSION_KEY) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
- }
- if (feature & NTLMSSP_FEATURE_SIGN) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
- }
- if (feature & NTLMSSP_FEATURE_SEAL) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
- }
- if (feature & NTLMSSP_FEATURE_CCACHE) {
- ntlmssp_state->use_ccache = true;
- }
-}
-
-/**
- * Next state function for the NTLMSSP state machine
- *
- * @param ntlmssp_state NTLMSSP State
- * @param in The packet in from the NTLMSSP partner, as a DATA_BLOB
- * @param out The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
- */
-
-NTSTATUS ntlmssp_update(struct ntlmssp_state *ntlmssp_state,
- const DATA_BLOB input, DATA_BLOB *out)
-{
- uint32_t ntlmssp_command;
- int i;
-
- if (ntlmssp_state->expected_state == NTLMSSP_DONE) {
- /* Called update after negotiations finished. */
- DEBUG(1, ("Called NTLMSSP after state machine was 'done'\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- *out = data_blob_null;
-
- if (!input.length) {
- switch (ntlmssp_state->role) {
- case NTLMSSP_CLIENT:
- ntlmssp_command = NTLMSSP_INITIAL;
- break;
- case NTLMSSP_SERVER:
- /* 'datagram' mode - no neg packet */
- ntlmssp_command = NTLMSSP_NEGOTIATE;
- break;
- default:
- DEBUG(1, ("Invalid role: %d\n", ntlmssp_state->role));
- return NT_STATUS_INVALID_PARAMETER;
- }
- } else {
- if (!msrpc_parse(ntlmssp_state, &input, "Cd",
- "NTLMSSP",
- &ntlmssp_command)) {
- DEBUG(1, ("Failed to parse NTLMSSP packet, could not extract NTLMSSP command\n"));
- dump_data(2, input.data, input.length);
- return NT_STATUS_INVALID_PARAMETER;
- }
- }
-
- if (ntlmssp_command != ntlmssp_state->expected_state) {
- DEBUG(1, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- for (i=0; ntlmssp_callbacks[i].fn; i++) {
- if (ntlmssp_callbacks[i].role == ntlmssp_state->role
- && ntlmssp_callbacks[i].ntlmssp_command == ntlmssp_command) {
- return ntlmssp_callbacks[i].fn(ntlmssp_state, ntlmssp_state, input, out);
- }
- }
-
- DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
- ntlmssp_state->role, ntlmssp_command));
-
- return NT_STATUS_INVALID_PARAMETER;
-}
-
-/*********************************************************************
- Client side NTLMSSP
-*********************************************************************/
-
-/**
- * Next state function for the Initial packet
- *
- * @param ntlmssp_state NTLMSSP State
- * @param request The request, as a DATA_BLOB. reply.data must be NULL
- * @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors or NT_STATUS_OK.
- */
-
-static NTSTATUS ntlmssp3_client_initial(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- DATA_BLOB in, DATA_BLOB *out)
-{
- const char *domain = ntlmssp_state->client.netbios_domain;
- const char *workstation = ntlmssp_state->client.netbios_name;
- NTSTATUS status;
-
- /* These don't really matter in the initial packet, so don't panic if they are not set */
- if (!domain) {
- domain = "";
- }
-
- if (!workstation) {
- workstation = "";
- }
-
- if (ntlmssp_state->unicode) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
- } else {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
- }
-
- if (ntlmssp_state->use_ntlmv2) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
- }
-
- /* generate the ntlmssp negotiate packet */
- status = msrpc_gen(out_mem_ctx,
- out, "CddAA",
- "NTLMSSP",
- NTLMSSP_NEGOTIATE,
- ntlmssp_state->neg_flags,
- domain,
- workstation);
-
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("ntlmssp_client_initial: failed to generate "
- "ntlmssp negotiate packet\n"));
- return status;
- }
-
- if (DEBUGLEVEL >= 10) {
- struct NEGOTIATE_MESSAGE *negotiate = talloc(
- talloc_tos(), struct NEGOTIATE_MESSAGE);
- if (negotiate != NULL) {
- status = ntlmssp_pull_NEGOTIATE_MESSAGE(
- out, negotiate, negotiate);
- if (NT_STATUS_IS_OK(status)) {
- NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
- negotiate);
- }
- TALLOC_FREE(negotiate);
- }
- }
-
- ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
-
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
-}
-
-bool ntlmssp_is_anonymous(struct ntlmssp_state *ntlmssp_state)
-{
- const char *user = ntlmssp_state->user;
-
- if (user == NULL) {
- return true;
- }
-
- if (strlen(user) == 0) {
- return true;
- }
-
- return false;
-}
-
-/**
- * Next state function for the Challenge Packet. Generate an auth packet.
- *
- * @param ntlmssp_state NTLMSSP State
- * @param request The request, as a DATA_BLOB. reply.data must be NULL
- * @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors or NT_STATUS_OK.
- */
-
-static NTSTATUS ntlmssp3_client_challenge(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx, /* Unused at this time */
- const DATA_BLOB reply, DATA_BLOB *next_request)
-{
- uint32_t chal_flags, ntlmssp_command, unkn1 = 0, unkn2 = 0;
- DATA_BLOB server_domain_blob;
- DATA_BLOB challenge_blob;
- DATA_BLOB struct_blob = data_blob_null;
- char *server_domain;
- const char *chal_parse_string;
- const char *chal_parse_string_short = NULL;
- const char *auth_gen_string;
- DATA_BLOB lm_response = data_blob_null;
- DATA_BLOB nt_response = data_blob_null;
- DATA_BLOB session_key = data_blob_null;
- DATA_BLOB encrypted_session_key = data_blob_null;
- NTSTATUS nt_status = NT_STATUS_OK;
- bool anon = ntlmssp_is_anonymous(ntlmssp_state);
-
- if (!anon && ntlmssp_state->use_ccache) {
- struct wbcCredentialCacheParams params;
- struct wbcCredentialCacheInfo *info = NULL;
- struct wbcAuthErrorInfo *error = NULL;
- struct wbcNamedBlob auth_blob;
- struct wbcBlob *wbc_next = NULL;
- struct wbcBlob *wbc_session_key = NULL;
- wbcErr wbc_status;
- int i;
-
- /*
- * We need to set the netbios name or we are not able to connect
- * a Windows DC.
- */
- if (ntlmssp_state->server.netbios_domain == NULL ||
- ntlmssp_state->server.netbios_domain[0] == '\0') {
- ntlmssp_state->server.netbios_domain = ntlmssp_state->domain;
- }
-
- params.account_name = ntlmssp_state->user;
- params.domain_name = ntlmssp_state->domain;
- params.level = WBC_CREDENTIAL_CACHE_LEVEL_NTLMSSP;
-
- auth_blob.name = "challenge_blob";
- auth_blob.flags = 0;
- auth_blob.blob.data = reply.data;
- auth_blob.blob.length = reply.length;
- params.num_blobs = 1;
- params.blobs = &auth_blob;
-
- wbc_status = wbcCredentialCache(¶ms, &info, &error);
- wbcFreeMemory(error);
- if (!WBC_ERROR_IS_OK(wbc_status)) {
- goto noccache;
- }
-
- for (i=0; i<info->num_blobs; i++) {
- if (strequal(info->blobs[i].name, "auth_blob")) {
- wbc_next = &info->blobs[i].blob;
- }
- if (strequal(info->blobs[i].name, "session_key")) {
- wbc_session_key = &info->blobs[i].blob;
- }
- }
- if ((wbc_next == NULL) || (wbc_session_key == NULL)) {
- wbcFreeMemory(info);
- goto noccache;
- }
-
- *next_request = data_blob_talloc(ntlmssp_state,
- wbc_next->data,
- wbc_next->length);
- ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state,
- wbc_session_key->data,
- wbc_session_key->length);
-
- wbcFreeMemory(info);
- goto done;
- }
-
-noccache:
-
- if (!msrpc_parse(ntlmssp_state, &reply, "CdBd",
- "NTLMSSP",
- &ntlmssp_command,
- &server_domain_blob,
- &chal_flags)) {
- DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
- dump_data(2, reply.data, reply.length);
-
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (DEBUGLEVEL >= 10) {
- struct CHALLENGE_MESSAGE *challenge = talloc(
- talloc_tos(), struct CHALLENGE_MESSAGE);
- if (challenge != NULL) {
- NTSTATUS status;
- challenge->NegotiateFlags = chal_flags;
- status = ntlmssp_pull_CHALLENGE_MESSAGE(
- &reply, challenge, challenge);
- if (NT_STATUS_IS_OK(status)) {
- NDR_PRINT_DEBUG(CHALLENGE_MESSAGE,
- challenge);
- }
- TALLOC_FREE(challenge);
- }
- }
-
- data_blob_free(&server_domain_blob);
-
- DEBUG(3, ("Got challenge flags:\n"));
- debug_ntlmssp_flags(chal_flags);
-
- ntlmssp_handle_neg_flags(ntlmssp_state, chal_flags, lp_client_lanman_auth());
-
- if (ntlmssp_state->unicode) {
- if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
- chal_parse_string = "CdUdbddB";
- } else {
- chal_parse_string = "CdUdbdd";
- chal_parse_string_short = "CdUdb";
- }
- auth_gen_string = "CdBBUUUBd";
- } else {
- if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
- chal_parse_string = "CdAdbddB";
- } else {
- chal_parse_string = "CdAdbdd";
- chal_parse_string_short = "CdAdb";
- }
-
- auth_gen_string = "CdBBAAABd";
- }
-
- DEBUG(3, ("NTLMSSP: Set final flags:\n"));
- debug_ntlmssp_flags(ntlmssp_state->neg_flags);
-
- if (!msrpc_parse(ntlmssp_state, &reply, chal_parse_string,
- "NTLMSSP",
- &ntlmssp_command,
- &server_domain,
- &chal_flags,
- &challenge_blob, 8,
- &unkn1, &unkn2,
- &struct_blob)) {
-
- bool ok = false;
-
- DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
-
- if (chal_parse_string_short != NULL) {
- /*
- * In the case where NTLMSSP_NEGOTIATE_TARGET_INFO
- * is not used, some NTLMSSP servers don't return
- * the unused unkn1 and unkn2 fields.
- * See bug:
- * https://bugzilla.samba.org/show_bug.cgi?id=10016
- * for packet traces.
- * Try and parse again without them.
- */
- ok = msrpc_parse(ntlmssp_state, &reply,
- chal_parse_string_short,
- "NTLMSSP",
- &ntlmssp_command,
- &server_domain,
- &chal_flags,
- &challenge_blob, 8);
- if (!ok) {
- DEBUG(1, ("Failed to short parse "
- "the NTLMSSP Challenge: (#2)\n"));
- }
- }
-
- if (!ok) {
- dump_data(2, reply.data, reply.length);
- return NT_STATUS_INVALID_PARAMETER;
- }
- }
-
- if (chal_flags & NTLMSSP_TARGET_TYPE_SERVER) {
- ntlmssp_state->server.is_standalone = true;
- } else {
- ntlmssp_state->server.is_standalone = false;
- }
- /* TODO: parse struct_blob and fill in the rest */
- ntlmssp_state->server.netbios_name = "";
- ntlmssp_state->server.netbios_domain = server_domain;
- ntlmssp_state->server.dns_name = "";
- ntlmssp_state->server.dns_domain = "";
-
- if (challenge_blob.length != 8) {
- data_blob_free(&struct_blob);
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (anon || !ntlmssp_state->nt_hash) {
- static const uint8_t zeros[16] = {0, };
- /* do nothing - blobs are zero length */
-
- /* session key is all zeros */
- session_key = data_blob_talloc(ntlmssp_state, zeros, 16);
-
- /* not doing NLTM2 without a password */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
- } else if (ntlmssp_state->use_ntlmv2) {
- if (!struct_blob.length) {
- /* be lazy, match win2k - we can't do NTLMv2 without it */
- DEBUG(1, ("Server did not provide 'target information', required for NTLMv2\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- /* TODO: if the remote server is standalone, then we should replace 'domain'
- with the server name as supplied above */
-
- if (!SMBNTLMv2encrypt_hash(ntlmssp_state,
- ntlmssp_state->user,
- ntlmssp_state->domain,
- ntlmssp_state->nt_hash, &challenge_blob,
- &struct_blob,
- &lm_response, &nt_response, NULL,
- &session_key)) {
- data_blob_free(&challenge_blob);
- data_blob_free(&struct_blob);
- return NT_STATUS_NO_MEMORY;
- }
- } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- MD5_CTX md5_session_nonce_ctx;
- uint8_t session_nonce[16];
- uint8_t session_nonce_hash[16];
- uint8_t user_session_key[16];
-
- lm_response = data_blob_talloc(ntlmssp_state, NULL, 24);
- generate_random_buffer(lm_response.data, 8);
- memset(lm_response.data+8, 0, 16);
-
- memcpy(session_nonce, challenge_blob.data, 8);
- memcpy(&session_nonce[8], lm_response.data, 8);
-
- MD5Init(&md5_session_nonce_ctx);
- MD5Update(&md5_session_nonce_ctx, challenge_blob.data, 8);
- MD5Update(&md5_session_nonce_ctx, lm_response.data, 8);
- MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
-
- DEBUG(5, ("NTLMSSP challenge set by NTLM2\n"));
- DEBUG(5, ("challenge is: \n"));
- dump_data(5, session_nonce_hash, 8);
-
- nt_response = data_blob_talloc(ntlmssp_state, NULL, 24);
- SMBNTencrypt_hash(ntlmssp_state->nt_hash,
- session_nonce_hash,
- nt_response.data);
-
- session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
-
- SMBsesskeygen_ntv1(ntlmssp_state->nt_hash, user_session_key);
- hmac_md5(user_session_key, session_nonce, sizeof(session_nonce), session_key.data);
- dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
- } else {
- /* lanman auth is insecure, it may be disabled */
- if (lp_client_lanman_auth() && ntlmssp_state->lm_hash) {
- lm_response = data_blob_talloc(ntlmssp_state,
- NULL, 24);
- SMBencrypt_hash(ntlmssp_state->lm_hash,challenge_blob.data,
- lm_response.data);
- }
-
- nt_response = data_blob_talloc(ntlmssp_state, NULL, 24);
- SMBNTencrypt_hash(ntlmssp_state->nt_hash,challenge_blob.data,
- nt_response.data);
-
- session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
- if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
- && lp_client_lanman_auth() && ntlmssp_state->lm_hash) {
- SMBsesskeygen_lm_sess_key(ntlmssp_state->lm_hash, lm_response.data,
- session_key.data);
- dump_data_pw("LM session key\n", session_key.data, session_key.length);
- } else {
- SMBsesskeygen_ntv1(ntlmssp_state->nt_hash, session_key.data);
- dump_data_pw("NT session key:\n", session_key.data, session_key.length);
- }
- }
- data_blob_free(&struct_blob);
-
- /* Key exchange encryptes a new client-generated session key with
- the password-derived key */
- if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
- /* Make up a new session key */
- uint8_t client_session_key[16];
- generate_random_buffer(client_session_key, sizeof(client_session_key));
-
- /* Encrypt the new session key with the old one */
- encrypted_session_key = data_blob(client_session_key, sizeof(client_session_key));
- dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
- arcfour_crypt_blob(encrypted_session_key.data, encrypted_session_key.length, &session_key);
- dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
-
- /* Mark the new session key as the 'real' session key */
- data_blob_free(&session_key);
- session_key = data_blob_talloc(ntlmssp_state,
- client_session_key,
- sizeof(client_session_key));
- }
-
- /* this generates the actual auth packet */
- nt_status = msrpc_gen(ntlmssp_state, next_request, auth_gen_string,
- "NTLMSSP",
- NTLMSSP_AUTH,
- lm_response.data, lm_response.length,
- nt_response.data, nt_response.length,
- ntlmssp_state->domain,
- ntlmssp_state->user,
- ntlmssp_state->client.netbios_name,
- encrypted_session_key.data, encrypted_session_key.length,
- ntlmssp_state->neg_flags);
-
- if (!NT_STATUS_IS_OK(nt_status)) {
- return NT_STATUS_NO_MEMORY;
- }
-
- if (DEBUGLEVEL >= 10) {
- struct AUTHENTICATE_MESSAGE *authenticate = talloc(
- talloc_tos(), struct AUTHENTICATE_MESSAGE);
- if (authenticate != NULL) {
- NTSTATUS status;
- authenticate->NegotiateFlags =
- ntlmssp_state->neg_flags;
- status = ntlmssp_pull_AUTHENTICATE_MESSAGE(
- next_request, authenticate, authenticate);
- if (NT_STATUS_IS_OK(status)) {
- NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE,
- authenticate);
- }
- TALLOC_FREE(authenticate);
- }
- }
-
- data_blob_free(&encrypted_session_key);
-
- data_blob_free(&ntlmssp_state->chal);
-
- ntlmssp_state->session_key = session_key;
-
- ntlmssp_state->chal = challenge_blob;
- ntlmssp_state->lm_resp = lm_response;
- ntlmssp_state->nt_resp = nt_response;
-
-done:
-
- ntlmssp_state->expected_state = NTLMSSP_DONE;
-
- if (!NT_STATUS_IS_OK(nt_status = ntlmssp_sign_init(ntlmssp_state))) {
- DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n", nt_errstr(nt_status)));
- }
-
- return nt_status;
-}
-
-NTSTATUS ntlmssp_client_start(TALLOC_CTX *mem_ctx,
- const char *netbios_name,
- const char *netbios_domain,
- bool use_ntlmv2,
- struct ntlmssp_state **_ntlmssp_state)
-{
- struct ntlmssp_state *ntlmssp_state;
-
- if (!netbios_name) {
- netbios_name = "";
- }
-
- if (!netbios_domain) {
- netbios_domain = "";
- }
-
- ntlmssp_state = talloc_zero(mem_ctx, struct ntlmssp_state);
- if (!ntlmssp_state) {
- return NT_STATUS_NO_MEMORY;
- }
-
- ntlmssp_state->role = NTLMSSP_CLIENT;
-
- ntlmssp_state->unicode = True;
-
- ntlmssp_state->use_ntlmv2 = use_ntlmv2;
-
- ntlmssp_state->expected_state = NTLMSSP_INITIAL;
-
- ntlmssp_state->neg_flags =
- NTLMSSP_NEGOTIATE_128 |
- NTLMSSP_NEGOTIATE_ALWAYS_SIGN |
- NTLMSSP_NEGOTIATE_NTLM |
- NTLMSSP_NEGOTIATE_NTLM2 |
- NTLMSSP_NEGOTIATE_KEY_EXCH |
- NTLMSSP_REQUEST_TARGET;
-
- ntlmssp_state->client.netbios_name = talloc_strdup(ntlmssp_state, netbios_name);
- if (!ntlmssp_state->client.netbios_name) {
- talloc_free(ntlmssp_state);
- return NT_STATUS_NO_MEMORY;
- }
- ntlmssp_state->client.netbios_domain = talloc_strdup(ntlmssp_state, netbios_domain);
- if (!ntlmssp_state->client.netbios_domain) {
- talloc_free(ntlmssp_state);
- return NT_STATUS_NO_MEMORY;
- }
-
- *_ntlmssp_state = ntlmssp_state;
- return NT_STATUS_OK;
-}
git.samba.org / samba.git / commitdiff