#ifndef _SAMBA_AUTH_H
#define _SAMBA_AUTH_H
-#include "auth/gensec/ntlmssp.h"
#include "libcli/auth/credentials.h"
#include "auth/gensec/gensec.h"
#include "auth/gensec/spnego.h"
# End MODULE gensec_spnego
################################################
-################################################
-# Start MODULE gensec_ntlmssp
-[MODULE::gensec_ntlmssp]
-SUBSYSTEM = GENSEC
-INIT_FUNCTION = gensec_ntlmssp_init
-INIT_OBJ_FILES = auth/gensec/ntlmssp.o
-ADD_OBJ_FILES = \
- auth/gensec/ntlmssp_parse.o \
- auth/gensec/ntlmssp_sign.o
-REQUIRED_SUBSYSTEMS = AUTH
-# End MODULE gensec_ntlmssp
-################################################
-
################################################
# Start MODULE gensec_schannel
[MODULE::gensec_schannel]
ADD_OBJ_FILES = \
auth/gensec/schannel_sign.o
REQUIRED_SUBSYSTEMS = AUTH SCHANNELDB
-# End MODULE gensec_ntlmssp
+# End MODULE gensec_schannel
################################################
################################################
+++ /dev/null
-/*
- Unix SMB/Netbios implementation.
- Version 3.0
- handle NLTMSSP, client server side parsing
-
- Copyright (C) Andrew Tridgell 2001
- Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
- 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 2 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include "includes.h"
-#include "auth/auth.h"
-#include "lib/crypto/crypto.h"
-#include "pstring.h"
-
-static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- DATA_BLOB in, DATA_BLOB *out);
-static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out);
-static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out);
-static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out);
-
-/**
- * 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, ntlmssp_client_initial},
- {NTLMSSP_SERVER, NTLMSSP_NEGOTIATE, ntlmssp_server_negotiate},
- {NTLMSSP_CLIENT, NTLMSSP_CHALLENGE, ntlmssp_client_challenge},
- {NTLMSSP_SERVER, NTLMSSP_AUTH, ntlmssp_server_auth},
-};
-
-
-/**
- * Print out the NTLMSSP flags for debugging
- * @param neg_flags The flags from the packet
- */
-
-void debug_ntlmssp_flags(uint32_t neg_flags)
-{
- DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
-
- if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_UNICODE\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_OEM)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM\n"));
- if (neg_flags & NTLMSSP_REQUEST_TARGET)
- DEBUGADD(4, (" NTLMSSP_REQUEST_TARGET\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_SIGN)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SIGN\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_SEAL)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SEAL\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_LM_KEY\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NETWARE)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NETWARE\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NTLM)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NTLM\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_ALWAYS_SIGN\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NTLM2\n"));
- if (neg_flags & NTLMSSP_CHAL_TARGET_INFO)
- DEBUGADD(4, (" NTLMSSP_CHAL_TARGET_INFO\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_128)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_128\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_KEY_EXCH\n"));
-}
-
-/**
- * Default challenge generation code.
- *
- */
-
-static const uint8_t *get_challenge(const struct ntlmssp_state *ntlmssp_state)
-{
- uint8_t *chal = talloc_size(ntlmssp_state, 8);
- generate_random_buffer(chal, 8);
-
- return chal;
-}
-
-/**
- * Default 'we can set the challenge to anything we like' implementation
- *
- */
-
-static BOOL may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
-{
- return True;
-}
-
-/**
- * Default 'we can set the challenge to anything we like' implementation
- *
- * Does not actually do anything, as the value is always in the structure anyway.
- *
- */
-
-static NTSTATUS set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
-{
- SMB_ASSERT(challenge->length == 8);
- return NT_STATUS_OK;
-}
-
-/**
- * Set a username on an NTLMSSP context - ensures it is talloc()ed
- *
- */
-
-NTSTATUS ntlmssp_set_username(struct ntlmssp_state *ntlmssp_state, const char *user)
-{
- if (!user) {
- /* it should be at least "" */
- DEBUG(1, ("NTLMSSP failed to set username - cannot accept NULL username\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
- ntlmssp_state->user = talloc_strdup(ntlmssp_state, user);
- if (!ntlmssp_state->user) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Set a password on an NTLMSSP context - ensures it is talloc()ed
- *
- */
-NTSTATUS ntlmssp_set_password(struct ntlmssp_state *ntlmssp_state, const char *password)
-{
- if (!password) {
- ntlmssp_state->password = NULL;
- } else {
- ntlmssp_state->password = talloc_strdup(ntlmssp_state, password);
- if (!ntlmssp_state->password) {
- 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);
- if (!ntlmssp_state->domain) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
- *
- */
-NTSTATUS ntlmssp_set_workstation(struct ntlmssp_state *ntlmssp_state, const char *workstation)
-{
- ntlmssp_state->workstation = talloc_strdup(ntlmssp_state, workstation);
- if (!ntlmssp_state->workstation) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Store a DATA_BLOB containing an NTLMSSP response, for use later.
- * This copies the data blob
- */
-
-NTSTATUS ntlmssp_store_response(struct ntlmssp_state *ntlmssp_state,
- DATA_BLOB response)
-{
- ntlmssp_state->stored_response = data_blob_talloc(ntlmssp_state,
- response.data, response.length);
- return NT_STATUS_OK;
-}
-
-/**
- * Next state function for the wrapped NTLMSSP state machine
- *
- * @param gensec_security GENSEC state, initialised to NTLMSSP
- * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
- * @param in The request, as a DATA_BLOB
- * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
- * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
- * or NT_STATUS_OK if the user is authenticated.
- */
-
-static NTSTATUS gensec_ntlmssp_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out)
-{
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
- struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp_state->ntlmssp_state;
- NTSTATUS status;
-
- DATA_BLOB input;
- uint32_t ntlmssp_command;
- int i;
-
- *out = data_blob(NULL, 0);
-
- if (ntlmssp_state->expected_state == NTLMSSP_DONE) {
- return NT_STATUS_OK;
- }
-
- if (!out_mem_ctx) {
- /* if the caller doesn't want to manage/own the memory,
- we can put it on our context */
- out_mem_ctx = ntlmssp_state;
- }
-
- if (!in.length && ntlmssp_state->stored_response.length) {
- input = ntlmssp_state->stored_response;
-
- /* we only want to read the stored response once - overwrite it */
- ntlmssp_state->stored_response = data_blob(NULL, 0);
- } else {
- input = in;
- }
-
- 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;
- }
- } 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; i < ARRAY_SIZE(ntlmssp_callbacks); i++) {
- if (ntlmssp_callbacks[i].role == ntlmssp_state->role
- && ntlmssp_callbacks[i].ntlmssp_command == ntlmssp_command) {
- status = ntlmssp_callbacks[i].fn(ntlmssp_state, out_mem_ctx, input, out);
- break;
- }
- }
-
- if (i == ARRAY_SIZE(ntlmssp_callbacks)) {
-
- DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
- ntlmssp_state->role, ntlmssp_command));
-
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- gensec_ntlmssp_state->have_features = 0;
-
- if (gensec_ntlmssp_state->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
- gensec_ntlmssp_state->have_features |= GENSEC_FEATURE_SIGN;
- }
-
- if (gensec_ntlmssp_state->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
- gensec_ntlmssp_state->have_features |= GENSEC_FEATURE_SEAL;
- }
-
- if (gensec_ntlmssp_state->ntlmssp_state->session_key.data) {
- gensec_ntlmssp_state->have_features |= GENSEC_FEATURE_SESSION_KEY;
- }
-
- return status;
-}
-
-/**
- * Return the NTLMSSP master session key
- *
- * @param ntlmssp_state NTLMSSP State
- */
-
-NTSTATUS gensec_ntlmssp_session_key(struct gensec_security *gensec_security,
- DATA_BLOB *session_key)
-{
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
- struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp_state->ntlmssp_state;
-
- if (!ntlmssp_state->session_key.data) {
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
- *session_key = ntlmssp_state->session_key;
-
- return NT_STATUS_OK;
-}
-
-/**
- * Determine correct target name flags for reply, given server role
- * and negotiated flags
- *
- * @param ntlmssp_state NTLMSSP State
- * @param neg_flags The flags from the packet
- * @param chal_flags The flags to be set in the reply packet
- * @return The 'target name' string.
- */
-
-static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
- uint32_t neg_flags, uint32_t *chal_flags)
-{
- if (neg_flags & NTLMSSP_REQUEST_TARGET) {
- *chal_flags |= NTLMSSP_CHAL_TARGET_INFO;
- *chal_flags |= NTLMSSP_REQUEST_TARGET;
- if (ntlmssp_state->server_role == ROLE_STANDALONE) {
- *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
- return ntlmssp_state->server_name;
- } else {
- *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
- return ntlmssp_state->get_domain();
- };
- } else {
- return "";
- }
-}
-
-static void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
- uint32_t neg_flags, BOOL allow_lm) {
- if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
- ntlmssp_state->unicode = True;
- } else {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
- ntlmssp_state->unicode = False;
- }
-
- if ((neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) && allow_lm && !ntlmssp_state->use_ntlmv2) {
- /* other end forcing us to use LM */
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
- } else {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
- }
-
- if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
- }
-
- if (!(neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SIGN;
- }
-
- if (!(neg_flags & NTLMSSP_NEGOTIATE_SEAL)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SEAL;
- }
-
- if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
- }
-
- if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
- if (neg_flags & NTLMSSP_NEGOTIATE_56) {
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
- }
- }
-
- if (!(neg_flags & NTLMSSP_NEGOTIATE_56)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_56;
- }
-
- if (!(neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
- }
-
- if ((neg_flags & NTLMSSP_REQUEST_TARGET)) {
- ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
- }
-
-}
-
-/**
- Weaken NTLMSSP keys to cope with down-level clients and servers.
-
- We probably should have some parameters to control this, but as
- it only occours for LM_KEY connections, and this is controlled
- by the client lanman auth/lanman auth parameters, it isn't too bad.
-*/
-
-static void ntlmssp_weaken_keys(struct ntlmssp_state *ntlmssp_state) {
- /* Key weakening not performed on the master key for NTLM2
- and does not occour for NTLM1. Therefore we only need
- to do this for the LM_KEY.
- */
-
- if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
- if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_128) {
-
- } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_56) {
- ntlmssp_state->session_key.data[7] = 0xa0;
- } else { /* forty bits */
- ntlmssp_state->session_key.data[5] = 0xe5;
- ntlmssp_state->session_key.data[6] = 0x38;
- ntlmssp_state->session_key.data[7] = 0xb0;
- }
- ntlmssp_state->session_key.length = 8;
- }
-}
-
-/**
- * Next state function for the Negotiate packet
- *
- * @param ntlmssp_state NTLMSSP State
- * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
- * @param in The request, as a DATA_BLOB
- * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
- * @return Errors or MORE_PROCESSING_REQUIRED if a reply is sent.
- */
-
-static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out)
-{
- DATA_BLOB struct_blob;
- fstring dnsname, dnsdomname;
- uint32_t neg_flags = 0;
- uint32_t ntlmssp_command, chal_flags;
- char *cliname=NULL, *domname=NULL;
- const uint8_t *cryptkey;
- const char *target_name;
-
- /* parse the NTLMSSP packet */
-#if 0
- file_save("ntlmssp_negotiate.dat", request.data, request.length);
-#endif
-
- if (in.length) {
- if (!msrpc_parse(ntlmssp_state,
- &in, "CddAA",
- "NTLMSSP",
- &ntlmssp_command,
- &neg_flags,
- &cliname,
- &domname)) {
- DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP:\n"));
- dump_data(2, in.data, in.length);
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- debug_ntlmssp_flags(neg_flags);
- }
-
- ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, ntlmssp_state->allow_lm_key);
-
- /* Ask our caller what challenge they would like in the packet */
- cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
-
- /* Check if we may set the challenge */
- if (!ntlmssp_state->may_set_challenge(ntlmssp_state)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
- }
-
- /* The flags we send back are not just the negotiated flags,
- * they are also 'what is in this packet'. Therfore, we
- * operate on 'chal_flags' from here on
- */
-
- chal_flags = ntlmssp_state->neg_flags;
-
- /* get the right name to fill in as 'target' */
- target_name = ntlmssp_target_name(ntlmssp_state,
- neg_flags, &chal_flags);
- if (target_name == NULL)
- return NT_STATUS_INVALID_PARAMETER;
-
- ntlmssp_state->chal = data_blob_talloc(ntlmssp_state, cryptkey, 8);
- ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state, cryptkey, 8);
-
- /* This should be a 'netbios domain -> DNS domain' mapping */
- dnsdomname[0] = '\0';
- get_mydomname(dnsdomname);
- strlower_m(dnsdomname);
-
- dnsname[0] = '\0';
- get_myfullname(dnsname);
-
- /* This creates the 'blob' of names that appears at the end of the packet */
- if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
- {
- const char *target_name_dns = "";
- if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
- target_name_dns = dnsdomname;
- } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
- target_name_dns = dnsname;
- }
-
- msrpc_gen(out_mem_ctx,
- &struct_blob, "aaaaa",
- NTLMSSP_NAME_TYPE_DOMAIN, target_name,
- NTLMSSP_NAME_TYPE_SERVER, ntlmssp_state->server_name,
- NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
- NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
- 0, "");
- } else {
- struct_blob = data_blob(NULL, 0);
- }
-
- {
- /* Marshel the packet in the right format, be it unicode or ASCII */
- const char *gen_string;
- if (ntlmssp_state->unicode) {
- gen_string = "CdUdbddB";
- } else {
- gen_string = "CdAdbddB";
- }
-
- msrpc_gen(out_mem_ctx,
- out, gen_string,
- "NTLMSSP",
- NTLMSSP_CHALLENGE,
- target_name,
- chal_flags,
- cryptkey, 8,
- 0, 0,
- struct_blob.data, struct_blob.length);
- }
-
- ntlmssp_state->expected_state = NTLMSSP_AUTH;
-
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
-}
-
-/**
- * Next state function for the Authenticate packet
- *
- * @param ntlmssp_state NTLMSSP State
- * @param request The request, as a DATA_BLOB
- * @return Errors or NT_STATUS_OK.
- */
-
-static NTSTATUS ntlmssp_server_preauth(struct ntlmssp_state *ntlmssp_state,
- const DATA_BLOB request)
-{
- uint32_t ntlmssp_command, auth_flags;
- NTSTATUS nt_status;
-
- uint8_t session_nonce_hash[16];
-
- const char *parse_string;
- char *domain = NULL;
- char *user = NULL;
- char *workstation = NULL;
-
-#if 0
- file_save("ntlmssp_auth.dat", request.data, request.length);
-#endif
-
- if (ntlmssp_state->unicode) {
- parse_string = "CdBBUUUBd";
- } else {
- parse_string = "CdBBAAABd";
- }
-
- /* zero these out */
- data_blob_free(&ntlmssp_state->lm_resp);
- data_blob_free(&ntlmssp_state->nt_resp);
-
- ntlmssp_state->user = NULL;
- ntlmssp_state->domain = NULL;
- ntlmssp_state->workstation = NULL;
-
- /* now the NTLMSSP encoded auth hashes */
- if (!msrpc_parse(ntlmssp_state,
- &request, parse_string,
- "NTLMSSP",
- &ntlmssp_command,
- &ntlmssp_state->lm_resp,
- &ntlmssp_state->nt_resp,
- &domain,
- &user,
- &workstation,
- &ntlmssp_state->encrypted_session_key,
- &auth_flags)) {
- DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
- dump_data(10, request.data, request.length);
-
- /* zero this out */
- data_blob_free(&ntlmssp_state->encrypted_session_key);
- auth_flags = 0;
-
- /* Try again with a shorter string (Win9X truncates this packet) */
- if (ntlmssp_state->unicode) {
- parse_string = "CdBBUUU";
- } else {
- parse_string = "CdBBAAA";
- }
-
- /* now the NTLMSSP encoded auth hashes */
- if (!msrpc_parse(ntlmssp_state,
- &request, parse_string,
- "NTLMSSP",
- &ntlmssp_command,
- &ntlmssp_state->lm_resp,
- &ntlmssp_state->nt_resp,
- &domain,
- &user,
- &workstation)) {
- DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
- dump_data(2, request.data, request.length);
-
- return NT_STATUS_INVALID_PARAMETER;
- }
- }
-
- if (auth_flags)
- ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, ntlmssp_state->allow_lm_key);
-
- if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
- /* zero this out */
- data_blob_free(&ntlmssp_state->encrypted_session_key);
- return nt_status;
- }
-
- if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
- /* zero this out */
- data_blob_free(&ntlmssp_state->encrypted_session_key);
- return nt_status;
- }
-
- if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(ntlmssp_state, workstation))) {
- /* zero this out */
- data_blob_free(&ntlmssp_state->encrypted_session_key);
- return nt_status;
- }
-
- DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
- ntlmssp_state->user, ntlmssp_state->domain, ntlmssp_state->workstation, (unsigned long)ntlmssp_state->lm_resp.length, (unsigned long)ntlmssp_state->nt_resp.length));
-
-#if 0
- file_save("nthash1.dat", &ntlmssp_state->nt_resp.data, &ntlmssp_state->nt_resp.length);
- file_save("lmhash1.dat", &ntlmssp_state->lm_resp.data, &ntlmssp_state->lm_resp.length);
-#endif
-
- /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
- client challenge
-
- However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
- */
- if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
- struct MD5Context md5_session_nonce_ctx;
- SMB_ASSERT(ntlmssp_state->internal_chal.data
- && ntlmssp_state->internal_chal.length == 8);
-
- ntlmssp_state->doing_ntlm2 = True;
-
- memcpy(ntlmssp_state->session_nonce, ntlmssp_state->internal_chal.data, 8);
- memcpy(&ntlmssp_state->session_nonce[8], ntlmssp_state->lm_resp.data, 8);
-
- MD5Init(&md5_session_nonce_ctx);
- MD5Update(&md5_session_nonce_ctx, ntlmssp_state->session_nonce, 16);
- MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
-
- ntlmssp_state->chal = data_blob_talloc(ntlmssp_state,
- session_nonce_hash, 8);
-
- /* LM response is no longer useful, zero it out */
- data_blob_free(&ntlmssp_state->lm_resp);
-
- /* We changed the effective challenge - set it */
- if (!NT_STATUS_IS_OK(nt_status =
- ntlmssp_state->set_challenge(ntlmssp_state,
- &ntlmssp_state->chal))) {
- /* zero this out */
- data_blob_free(&ntlmssp_state->encrypted_session_key);
- return nt_status;
- }
-
- /* LM Key is incompatible... */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
- }
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Next state function for the Authenticate packet
- * (after authentication - figures out the session keys etc)
- *
- * @param ntlmssp_state NTLMSSP State
- * @return Errors or NT_STATUS_OK.
- */
-
-static NTSTATUS ntlmssp_server_postauth(struct ntlmssp_state *ntlmssp_state,
- DATA_BLOB *user_session_key,
- DATA_BLOB *lm_session_key)
-{
- NTSTATUS nt_status;
- DATA_BLOB session_key = data_blob(NULL, 0);
-
- if (user_session_key)
- dump_data_pw("USER session key:\n", user_session_key->data, user_session_key->length);
-
- if (lm_session_key)
- dump_data_pw("LM first-8:\n", lm_session_key->data, lm_session_key->length);
-
- /* Handle the different session key derivation for NTLM2 */
- if (ntlmssp_state->doing_ntlm2) {
- if (user_session_key && user_session_key->data && user_session_key->length == 16) {
- session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
- hmac_md5(user_session_key->data, ntlmssp_state->session_nonce,
- sizeof(ntlmssp_state->session_nonce), session_key.data);
- DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
- dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
-
- } else {
- DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
- session_key = data_blob(NULL, 0);
- }
- } else if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
- /* Ensure we can never get here on NTLMv2 */
- && (ntlmssp_state->nt_resp.length == 0 || ntlmssp_state->nt_resp.length == 24)) {
-
- if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) {
- if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
- session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
- SMBsesskeygen_lm_sess_key(lm_session_key->data, ntlmssp_state->lm_resp.data,
- session_key.data);
- DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
- dump_data_pw("LM session key:\n", session_key.data, session_key.length);
- } else {
-
- /* When there is no LM response, just use zeros */
- static const uint8_t zeros[24];
- session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
- SMBsesskeygen_lm_sess_key(zeros, zeros,
- session_key.data);
- DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
- dump_data_pw("LM session key:\n", session_key.data, session_key.length);
- }
- } else {
- /* LM Key not selected */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
-
- DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
- session_key = data_blob(NULL, 0);
- }
-
- } else if (user_session_key && user_session_key->data) {
- session_key = *user_session_key;
- DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
- dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
-
- /* LM Key not selected */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
-
- } else if (lm_session_key && lm_session_key->data) {
- /* Very weird to have LM key, but no user session key, but anyway.. */
- session_key = *lm_session_key;
- DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
- dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
-
- /* LM Key not selected */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
-
- } else {
- DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
- session_key = data_blob(NULL, 0);
-
- /* LM Key not selected */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
- }
-
- /* With KEY_EXCH, the client supplies the proposed session key,
- but encrypts it with the long-term key */
- if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
- if (!ntlmssp_state->encrypted_session_key.data
- || ntlmssp_state->encrypted_session_key.length != 16) {
- data_blob_free(&ntlmssp_state->encrypted_session_key);
- DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
- ntlmssp_state->encrypted_session_key.length));
- return NT_STATUS_INVALID_PARAMETER;
- } else if (!session_key.data || session_key.length != 16) {
- DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
- session_key.length));
- ntlmssp_state->session_key = session_key;
- } else {
- dump_data_pw("KEY_EXCH session key (enc):\n",
- ntlmssp_state->encrypted_session_key.data,
- ntlmssp_state->encrypted_session_key.length);
- arcfour_crypt(ntlmssp_state->encrypted_session_key.data,
- session_key.data,
- ntlmssp_state->encrypted_session_key.length);
- ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state,
- ntlmssp_state->encrypted_session_key.data,
- ntlmssp_state->encrypted_session_key.length);
- dump_data_pw("KEY_EXCH session key:\n", ntlmssp_state->encrypted_session_key.data,
- ntlmssp_state->encrypted_session_key.length);
- }
- } else {
- ntlmssp_state->session_key = session_key;
- }
-
- /* The server might need us to use a partial-strength session key */
- ntlmssp_weaken_keys(ntlmssp_state);
-
- nt_status = ntlmssp_sign_init(ntlmssp_state);
-
- data_blob_free(&ntlmssp_state->encrypted_session_key);
-
- /* allow arbitarily many authentications, but watch that this will cause a
- memory leak, until the ntlmssp_state is shutdown
- */
-
- if (ntlmssp_state->server_multiple_authentications) {
- ntlmssp_state->expected_state = NTLMSSP_AUTH;
- } else {
- ntlmssp_state->expected_state = NTLMSSP_DONE;
- }
-
- return nt_status;
-}
-
-
-/**
- * Next state function for the Authenticate packet
- *
- * @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.
- */
-
-static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out)
-{
- DATA_BLOB user_session_key = data_blob(NULL, 0);
- DATA_BLOB lm_session_key = data_blob(NULL, 0);
- NTSTATUS nt_status;
-
- /* zero the outbound NTLMSSP packet */
- *out = data_blob_talloc(out_mem_ctx, NULL, 0);
-
- if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(ntlmssp_state, in))) {
- return nt_status;
- }
-
- /*
- * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
- * is required (by "ntlm auth = no" and "lm auth = no" being set in the
- * smb.conf file) and no NTLMv2 response was sent then the password check
- * will fail here. JRA.
- */
-
- /* Finally, actually ask if the password is OK */
-
- if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state,
- &user_session_key, &lm_session_key))) {
- return nt_status;
- }
-
- if (ntlmssp_state->server_use_session_keys) {
- return ntlmssp_server_postauth(ntlmssp_state, &user_session_key, &lm_session_key);
- } else {
- ntlmssp_state->session_key = data_blob(NULL, 0);
- return NT_STATUS_OK;
- }
-}
-
-/**
- * Create an NTLMSSP state machine
- *
- * @param ntlmssp_state NTLMSSP State, allocated by this function
- */
-
-NTSTATUS ntlmssp_server_start(TALLOC_CTX *mem_ctx, struct ntlmssp_state **ntlmssp_state)
-{
- *ntlmssp_state = talloc(mem_ctx, struct ntlmssp_state);
- if (!*ntlmssp_state) {
- DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
- return NT_STATUS_NO_MEMORY;
- }
- ZERO_STRUCTP(*ntlmssp_state);
-
- (*ntlmssp_state)->role = NTLMSSP_SERVER;
-
- (*ntlmssp_state)->get_challenge = get_challenge;
- (*ntlmssp_state)->set_challenge = set_challenge;
- (*ntlmssp_state)->may_set_challenge = may_set_challenge;
-
- (*ntlmssp_state)->workstation = NULL;
- (*ntlmssp_state)->server_name = lp_netbios_name();
-
- (*ntlmssp_state)->get_domain = lp_workgroup;
- (*ntlmssp_state)->server_role = ROLE_DOMAIN_MEMBER; /* a good default */
-
- (*ntlmssp_state)->expected_state = NTLMSSP_NEGOTIATE;
-
- (*ntlmssp_state)->allow_lm_key = (lp_lanman_auth()
- && lp_parm_bool(-1, "ntlmssp_server", "allow_lm_key", False));
-
- (*ntlmssp_state)->server_use_session_keys = True;
- (*ntlmssp_state)->server_multiple_authentications = False;
-
- (*ntlmssp_state)->ref_count = 1;
-
- (*ntlmssp_state)->neg_flags =
- NTLMSSP_NEGOTIATE_NTLM;
-
- if (lp_parm_bool(-1, "ntlmssp_server", "128bit", True)) {
- (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_128;
- }
-
- if (lp_parm_bool(-1, "ntlmssp_server", "keyexchange", True)) {
- (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
- }
-
- if (lp_parm_bool(-1, "ntlmssp_server", "ntlm2", True)) {
- (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
- }
-
- return NT_STATUS_OK;
-}
-
-/*********************************************************************
- Client side NTLMSSP
-*********************************************************************/
-
-/**
- * Next state function for the Initial packet
- *
- * @param ntlmssp_state NTLMSSP State
- * @param out_mem_ctx The DATA_BLOB *out will be allocated on this context
- * @param in The request, as a DATA_BLOB. reply.data must be NULL
- * @param out The reply, as an talloc()ed DATA_BLOB, on out_mem_ctx
- * @return Errors or NT_STATUS_OK.
- */
-
-static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- DATA_BLOB in, DATA_BLOB *out)
-{
- 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 */
- msrpc_gen(out_mem_ctx,
- out, "CddAA",
- "NTLMSSP",
- NTLMSSP_NEGOTIATE,
- ntlmssp_state->neg_flags,
- ntlmssp_state->get_domain(),
- ntlmssp_state->workstation);
-
- ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
-
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
-}
-
-/**
- * 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 ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
- TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out)
-{
- uint32_t chal_flags, ntlmssp_command, unkn1, unkn2;
- DATA_BLOB server_domain_blob;
- DATA_BLOB challenge_blob;
- DATA_BLOB struct_blob = data_blob(NULL, 0);
- char *server_domain;
- const char *chal_parse_string;
- const char *auth_gen_string;
- uint8_t lm_hash[16];
- DATA_BLOB lm_response = data_blob(NULL, 0);
- DATA_BLOB nt_response = data_blob(NULL, 0);
- DATA_BLOB session_key = data_blob(NULL, 0);
- DATA_BLOB lm_session_key = data_blob(NULL, 0);
- DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
- NTSTATUS nt_status;
-
- if (!msrpc_parse(ntlmssp_state,
- &in, "CdBd",
- "NTLMSSP",
- &ntlmssp_command,
- &server_domain_blob,
- &chal_flags)) {
- DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
- dump_data(2, in.data, in.length);
-
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- 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, ntlmssp_state->allow_lm_key);
-
- if (ntlmssp_state->unicode) {
- if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
- chal_parse_string = "CdUdbddB";
- } else {
- chal_parse_string = "CdUdbdd";
- }
- auth_gen_string = "CdBBUUUBd";
- } else {
- if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
- chal_parse_string = "CdAdbddB";
- } else {
- chal_parse_string = "CdAdbdd";
- }
-
- auth_gen_string = "CdBBAAABd";
- }
-
- DEBUG(3, ("NTLMSSP: Set final flags:\n"));
- debug_ntlmssp_flags(ntlmssp_state->neg_flags);
-
- if (!msrpc_parse(ntlmssp_state,
- &in, chal_parse_string,
- "NTLMSSP",
- &ntlmssp_command,
- &server_domain,
- &chal_flags,
- &challenge_blob, 8,
- &unkn1, &unkn2,
- &struct_blob)) {
- DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
- dump_data(2, in.data, in.length);
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- ntlmssp_state->server_domain = server_domain;
-
- if (challenge_blob.length != 8) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (!ntlmssp_state->password) {
- static const uint8_t zeros[16];
- /* do nothing - blobs are zero length */
-
- /* session key is all zeros */
- session_key = data_blob_talloc(ntlmssp_state, zeros, 16);
- lm_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(ntlmssp_state->user,
- ntlmssp_state->domain,
- ntlmssp_state->password, &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;
- }
-
- /* LM Key is incompatible... */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
-
- } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- struct MD5Context md5_session_nonce_ctx;
- uint8_t nt_hash[16];
- uint8_t session_nonce[16];
- uint8_t session_nonce_hash[16];
- uint8_t user_session_key[16];
- E_md4hash(ntlmssp_state->password, nt_hash);
-
- 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(ntlmssp_state->password,
- session_nonce_hash,
- nt_response.data);
-
- session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
-
- SMBsesskeygen_ntv1(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);
-
- /* LM Key is incompatible... */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
- } else {
- uint8_t nt_hash[16];
-
- if (ntlmssp_state->use_nt_response) {
- nt_response = data_blob_talloc(ntlmssp_state, NULL, 24);
- SMBNTencrypt(ntlmssp_state->password,challenge_blob.data,
- nt_response.data);
- E_md4hash(ntlmssp_state->password, nt_hash);
- session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
- SMBsesskeygen_ntv1(nt_hash, session_key.data);
- dump_data_pw("NT session key:\n", session_key.data, session_key.length);
- }
-
- /* lanman auth is insecure, it may be disabled */
- if (lp_client_lanman_auth()) {
- lm_response = data_blob_talloc(ntlmssp_state, NULL, 24);
- if (!SMBencrypt(ntlmssp_state->password,challenge_blob.data,
- lm_response.data)) {
- /* If the LM password was too long (and therefore the LM hash being
- of the first 14 chars only), don't send it */
- data_blob_free(&lm_response);
-
- /* LM Key is incompatible with 'long' passwords */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
- } else {
- E_deshash(ntlmssp_state->password, lm_hash);
- lm_session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
- memcpy(lm_session_key.data, lm_hash, 8);
- memset(&lm_session_key.data[8], '\0', 8);
-
- if (!ntlmssp_state->use_nt_response) {
- session_key = lm_session_key;
- }
- }
- } else {
- /* LM Key is incompatible... */
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
- }
- }
-
- if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
- && lp_client_lanman_auth() && lm_session_key.length == 16) {
- DATA_BLOB new_session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
- if (lm_response.length == 24) {
- SMBsesskeygen_lm_sess_key(lm_session_key.data, lm_response.data,
- new_session_key.data);
- } else {
- static const uint8_t zeros[24];
- SMBsesskeygen_lm_sess_key(lm_session_key.data, zeros,
- new_session_key.data);
- }
- new_session_key.length = 16;
- session_key = new_session_key;
- dump_data_pw("LM session key\n", session_key.data, session_key.length);
- }
-
-
- /* 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_talloc(ntlmssp_state,
- 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(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
- 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 */
- session_key = data_blob_talloc(ntlmssp_state, client_session_key, sizeof(client_session_key));
- }
-
- /* this generates the actual auth packet */
- if (!msrpc_gen(out_mem_ctx,
- out, 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->workstation,
- encrypted_session_key.data, encrypted_session_key.length,
- ntlmssp_state->neg_flags)) {
-
- return NT_STATUS_NO_MEMORY;
- }
-
- ntlmssp_state->session_key = session_key;
-
- /* The client might be using 56 or 40 bit weakened keys */
- ntlmssp_weaken_keys(ntlmssp_state);
-
- ntlmssp_state->chal = challenge_blob;
- ntlmssp_state->lm_resp = lm_response;
- ntlmssp_state->nt_resp = nt_response;
-
- ntlmssp_state->expected_state = NTLMSSP_DONE;
-
- nt_status = ntlmssp_sign_init(ntlmssp_state);
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n",
- nt_errstr(nt_status)));
- return nt_status;
- }
-
- return nt_status;
-}
-
-static NTSTATUS ntlmssp_client_start(TALLOC_CTX *mem_ctx, struct ntlmssp_state **ntlmssp_state)
-{
- *ntlmssp_state = talloc(mem_ctx, struct ntlmssp_state);
- if (!*ntlmssp_state) {
- DEBUG(0,("ntlmssp_client_start: talloc failed!\n"));
- return NT_STATUS_NO_MEMORY;
- }
- ZERO_STRUCTP(*ntlmssp_state);
-
- (*ntlmssp_state)->role = NTLMSSP_CLIENT;
-
- (*ntlmssp_state)->workstation = lp_netbios_name();
- (*ntlmssp_state)->get_domain = lp_workgroup;
-
- (*ntlmssp_state)->unicode = lp_parm_bool(-1, "ntlmssp_client", "unicode", True);
-
- (*ntlmssp_state)->use_nt_response = lp_parm_bool(-1, "ntlmssp_client", "send_nt_reponse", True);
-
- (*ntlmssp_state)->allow_lm_key = (lp_lanman_auth()
- && lp_parm_bool(-1, "ntlmssp_client", "allow_lm_key", False));
-
- (*ntlmssp_state)->use_ntlmv2 = lp_client_ntlmv2_auth();
-
- (*ntlmssp_state)->expected_state = NTLMSSP_INITIAL;
-
- (*ntlmssp_state)->ref_count = 1;
-
- (*ntlmssp_state)->neg_flags =
- NTLMSSP_NEGOTIATE_NTLM |
- NTLMSSP_REQUEST_TARGET;
-
- if (lp_parm_bool(-1, "ntlmssp_client", "128bit", True)) {
- (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_128;
- }
-
- if (lp_parm_bool(-1, "ntlmssp_client", "keyexchange", True)) {
- (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
- }
-
- if (lp_parm_bool(-1, "ntlmssp_client", "ntlm2", True)) {
- (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
- } else {
- /* apparently we can't do ntlmv2 if we don't do ntlm2 */
- (*ntlmssp_state)->use_ntlmv2 = False;
- }
-
- return NT_STATUS_OK;
-}
-
-/**
- * Return the challenge as determined by the authentication subsystem
- * @return an 8 byte random challenge
- */
-
-static const uint8_t *auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state)
-{
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = ntlmssp_state->auth_context;
- NTSTATUS status;
- const uint8_t *chal;
-
- status = auth_get_challenge(gensec_ntlmssp_state->auth_context, &chal);
- if (!NT_STATUS_IS_OK(status)) {
- return NULL;
- }
-
- return chal;
-}
-
-/**
- * Some authentication methods 'fix' the challenge, so we may not be able to set it
- *
- * @return If the effective challenge used by the auth subsystem may be modified
- */
-static BOOL auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
-{
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = ntlmssp_state->auth_context;
-
- return auth_challenge_may_be_modified(gensec_ntlmssp_state->auth_context);
-}
-
-/**
- * NTLM2 authentication modifies the effective challenge,
- * @param challenge The new challenge value
- */
-static NTSTATUS auth_ntlmssp_set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
-{
- NTSTATUS nt_status;
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = ntlmssp_state->auth_context;
- struct auth_context *auth_context = gensec_ntlmssp_state->auth_context;
- const uint8_t *chal;
-
- if (challenge->length != 8) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- chal = challenge->data;
-
- nt_status = auth_context_set_challenge(auth_context, chal, "NTLMSSP callback (NTLM2)");
-
- return nt_status;
-}
-
-/**
- * Check the password on an NTLMSSP login.
- *
- * Return the session keys used on the connection.
- */
-
-static NTSTATUS auth_ntlmssp_check_password(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
-{
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = ntlmssp_state->auth_context;
- struct auth_usersupplied_info *user_info = NULL;
- NTSTATUS nt_status;
-
- nt_status = make_user_info_map(ntlmssp_state,
- gensec_ntlmssp_state->ntlmssp_state->user,
- gensec_ntlmssp_state->ntlmssp_state->domain,
- gensec_ntlmssp_state->ntlmssp_state->workstation,
- gensec_ntlmssp_state->ntlmssp_state->lm_resp.data ? &gensec_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
- gensec_ntlmssp_state->ntlmssp_state->nt_resp.data ? &gensec_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
- NULL, NULL, NULL, True,
- &user_info);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- nt_status = auth_check_password(gensec_ntlmssp_state->auth_context, gensec_ntlmssp_state,
- user_info, &gensec_ntlmssp_state->server_info);
- talloc_free(user_info);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- if (gensec_ntlmssp_state->server_info->user_session_key.length) {
- DEBUG(10, ("Got NT session key of length %u\n", gensec_ntlmssp_state->server_info->user_session_key.length));
- *user_session_key = data_blob_talloc(ntlmssp_state,
- gensec_ntlmssp_state->server_info->user_session_key.data,
- gensec_ntlmssp_state->server_info->user_session_key.length);
- }
- if (gensec_ntlmssp_state->server_info->lm_session_key.length) {
- DEBUG(10, ("Got LM session key of length %u\n", gensec_ntlmssp_state->server_info->lm_session_key.length));
- *lm_session_key = data_blob_talloc(ntlmssp_state,
- gensec_ntlmssp_state->server_info->lm_session_key.data,
- gensec_ntlmssp_state->server_info->lm_session_key.length);
- }
- return nt_status;
-}
-
-static NTSTATUS gensec_ntlmssp_start(struct gensec_security *gensec_security)
-{
- struct gensec_ntlmssp_state *gensec_ntlmssp_state;
-
- gensec_ntlmssp_state = talloc(gensec_security, struct gensec_ntlmssp_state);
- if (!gensec_ntlmssp_state) {
- return NT_STATUS_NO_MEMORY;
- }
-
- gensec_ntlmssp_state->ntlmssp_state = NULL;
- gensec_ntlmssp_state->auth_context = NULL;
- gensec_ntlmssp_state->server_info = NULL;
- gensec_ntlmssp_state->have_features = 0;
-
- gensec_security->private_data = gensec_ntlmssp_state;
- return NT_STATUS_OK;
-}
-
-static NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
-{
- NTSTATUS nt_status;
- struct ntlmssp_state *ntlmssp_state;
- struct gensec_ntlmssp_state *gensec_ntlmssp_state;
-
- nt_status = gensec_ntlmssp_start(gensec_security);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- gensec_ntlmssp_state = gensec_security->private_data;
-
- nt_status = ntlmssp_server_start(gensec_ntlmssp_state, &gensec_ntlmssp_state->ntlmssp_state);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
- gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
- }
- if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
- gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
- }
-
- nt_status = auth_context_create(gensec_ntlmssp_state, lp_auth_methods(), &gensec_ntlmssp_state->auth_context);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- ntlmssp_state = gensec_ntlmssp_state->ntlmssp_state;
- ntlmssp_state->auth_context = gensec_ntlmssp_state;
- ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
- ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
- ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
- ntlmssp_state->check_password = auth_ntlmssp_check_password;
- ntlmssp_state->server_role = lp_server_role();
-
- return NT_STATUS_OK;
-}
-
-static NTSTATUS gensec_ntlmssp_client_start(struct gensec_security *gensec_security)
-{
- struct gensec_ntlmssp_state *gensec_ntlmssp_state;
- const char *password = NULL;
- NTSTATUS nt_status;
-
- nt_status = gensec_ntlmssp_start(gensec_security);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- gensec_ntlmssp_state = gensec_security->private_data;
- nt_status = ntlmssp_client_start(gensec_ntlmssp_state,
- &gensec_ntlmssp_state->ntlmssp_state);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
- /*
- * 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.
- *
- * Without this, Windows will not create the master key
- * that it thinks is only used for NTLMSSP signing and
- * sealing. (It is actually pulled out and used directly)
- */
- gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
- }
- if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
- gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
- }
- if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
- gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
- }
-
- nt_status = ntlmssp_set_domain(gensec_ntlmssp_state->ntlmssp_state,
- cli_credentials_get_domain(gensec_security->credentials));
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- nt_status = ntlmssp_set_username(gensec_ntlmssp_state->ntlmssp_state,
- cli_credentials_get_username(gensec_security->credentials));
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- password = cli_credentials_get_password(gensec_security->credentials);
-
- nt_status = ntlmssp_set_password(gensec_ntlmssp_state->ntlmssp_state, password);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- nt_status = ntlmssp_set_workstation(gensec_ntlmssp_state->ntlmssp_state,
- cli_credentials_get_workstation(gensec_security->credentials));
-
- gensec_security->private_data = gensec_ntlmssp_state;
-
- return NT_STATUS_OK;
-}
-
-/**
- * Return the credentials of a logged on user, including session keys
- * etc.
- *
- * Only valid after a successful authentication
- *
- * May only be called once per authentication.
- *
- */
-
-static NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
- struct auth_session_info **session_info)
-{
- NTSTATUS nt_status;
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
-
- nt_status = auth_generate_session_info(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info, session_info);
- NT_STATUS_NOT_OK_RETURN(nt_status);
-
- (*session_info)->session_key = data_blob_talloc(*session_info,
- gensec_ntlmssp_state->ntlmssp_state->session_key.data,
- gensec_ntlmssp_state->ntlmssp_state->session_key.length);
-
- return NT_STATUS_OK;
-}
-
-static BOOL gensec_ntlmssp_have_feature(struct gensec_security *gensec_security,
- uint32_t feature)
-{
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
- if (gensec_ntlmssp_state->have_features & feature) {
- return True;
- }
-
- return False;
-}
-
-static const struct gensec_security_ops gensec_ntlmssp_security_ops = {
- .name = "ntlmssp",
- .sasl_name = "NTLM",
- .auth_type = DCERPC_AUTH_TYPE_NTLMSSP,
- .oid = GENSEC_OID_NTLMSSP,
- .client_start = gensec_ntlmssp_client_start,
- .server_start = gensec_ntlmssp_server_start,
- .update = gensec_ntlmssp_update,
- .sig_size = gensec_ntlmssp_sig_size,
- .sign_packet = gensec_ntlmssp_sign_packet,
- .check_packet = gensec_ntlmssp_check_packet,
- .seal_packet = gensec_ntlmssp_seal_packet,
- .unseal_packet = gensec_ntlmssp_unseal_packet,
- .wrap = gensec_ntlmssp_wrap,
- .unwrap = gensec_ntlmssp_unwrap,
- .session_key = gensec_ntlmssp_session_key,
- .session_info = gensec_ntlmssp_session_info,
- .have_feature = gensec_ntlmssp_have_feature,
- .enabled = True
-};
-
-
-NTSTATUS gensec_ntlmssp_init(void)
-{
- NTSTATUS ret;
- ret = gensec_register(&gensec_ntlmssp_security_ops);
- if (!NT_STATUS_IS_OK(ret)) {
- DEBUG(0,("Failed to register '%s' gensec backend!\n",
- gensec_ntlmssp_security_ops.name));
- return ret;
- }
-
- return ret;
-}
--- /dev/null
+/*
+ Unix SMB/Netbios implementation.
+ Version 3.0
+ handle NLTMSSP, client server side parsing
+
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "auth/auth.h"
+#include "lib/crypto/crypto.h"
+#include "auth/ntlmssp/ntlmssp.h"
+
+/**
+ * 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, ntlmssp_client_initial},
+ {NTLMSSP_SERVER, NTLMSSP_NEGOTIATE, ntlmssp_server_negotiate},
+ {NTLMSSP_CLIENT, NTLMSSP_CHALLENGE, ntlmssp_client_challenge},
+ {NTLMSSP_SERVER, NTLMSSP_AUTH, ntlmssp_server_auth},
+};
+
+
+/**
+ * Print out the NTLMSSP flags for debugging
+ * @param neg_flags The flags from the packet
+ */
+
+void debug_ntlmssp_flags(uint32_t neg_flags)
+{
+ DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
+
+ if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_UNICODE\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_OEM)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM\n"));
+ if (neg_flags & NTLMSSP_REQUEST_TARGET)
+ DEBUGADD(4, (" NTLMSSP_REQUEST_TARGET\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_SIGN)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SIGN\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_SEAL)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SEAL\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_LM_KEY\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_NETWARE)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NETWARE\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_NTLM)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NTLM\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_ALWAYS_SIGN\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NTLM2\n"));
+ if (neg_flags & NTLMSSP_CHAL_TARGET_INFO)
+ DEBUGADD(4, (" NTLMSSP_CHAL_TARGET_INFO\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_128)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_128\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_KEY_EXCH\n"));
+}
+
+/**
+ * Set a username on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+
+NTSTATUS ntlmssp_set_username(struct ntlmssp_state *ntlmssp_state, const char *user)
+{
+ if (!user) {
+ /* it should be at least "" */
+ DEBUG(1, ("NTLMSSP failed to set username - cannot accept NULL username\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ ntlmssp_state->user = talloc_strdup(ntlmssp_state, user);
+ if (!ntlmssp_state->user) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Set a password on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+NTSTATUS ntlmssp_set_password(struct ntlmssp_state *ntlmssp_state, const char *password)
+{
+ if (!password) {
+ ntlmssp_state->password = NULL;
+ } else {
+ ntlmssp_state->password = talloc_strdup(ntlmssp_state, password);
+ if (!ntlmssp_state->password) {
+ 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);
+ if (!ntlmssp_state->domain) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+NTSTATUS ntlmssp_set_workstation(struct ntlmssp_state *ntlmssp_state, const char *workstation)
+{
+ ntlmssp_state->workstation = talloc_strdup(ntlmssp_state, workstation);
+ if (!ntlmssp_state->workstation) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Store a DATA_BLOB containing an NTLMSSP response, for use later.
+ * This copies the data blob
+ */
+
+NTSTATUS ntlmssp_store_response(struct ntlmssp_state *ntlmssp_state,
+ DATA_BLOB response)
+{
+ ntlmssp_state->stored_response = data_blob_talloc(ntlmssp_state,
+ response.data, response.length);
+ return NT_STATUS_OK;
+}
+
+/**
+ * Next state function for the wrapped NTLMSSP state machine
+ *
+ * @param gensec_security GENSEC state, initialised to NTLMSSP
+ * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
+ * @param in The request, as a DATA_BLOB
+ * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
+ * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
+ * or NT_STATUS_OK if the user is authenticated.
+ */
+
+static NTSTATUS gensec_ntlmssp_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
+ const DATA_BLOB in, DATA_BLOB *out)
+{
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
+ struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp_state->ntlmssp_state;
+ NTSTATUS status;
+
+ DATA_BLOB input;
+ uint32_t ntlmssp_command;
+ int i;
+
+ *out = data_blob(NULL, 0);
+
+ if (ntlmssp_state->expected_state == NTLMSSP_DONE) {
+ return NT_STATUS_OK;
+ }
+
+ if (!out_mem_ctx) {
+ /* if the caller doesn't want to manage/own the memory,
+ we can put it on our context */
+ out_mem_ctx = ntlmssp_state;
+ }
+
+ if (!in.length && ntlmssp_state->stored_response.length) {
+ input = ntlmssp_state->stored_response;
+
+ /* we only want to read the stored response once - overwrite it */
+ ntlmssp_state->stored_response = data_blob(NULL, 0);
+ } else {
+ input = in;
+ }
+
+ 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;
+ }
+ } 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; i < ARRAY_SIZE(ntlmssp_callbacks); i++) {
+ if (ntlmssp_callbacks[i].role == ntlmssp_state->role
+ && ntlmssp_callbacks[i].ntlmssp_command == ntlmssp_command) {
+ status = ntlmssp_callbacks[i].fn(ntlmssp_state, out_mem_ctx, input, out);
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(ntlmssp_callbacks)) {
+
+ DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
+ ntlmssp_state->role, ntlmssp_command));
+
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ gensec_ntlmssp_state->have_features = 0;
+
+ if (gensec_ntlmssp_state->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
+ gensec_ntlmssp_state->have_features |= GENSEC_FEATURE_SIGN;
+ }
+
+ if (gensec_ntlmssp_state->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
+ gensec_ntlmssp_state->have_features |= GENSEC_FEATURE_SEAL;
+ }
+
+ if (gensec_ntlmssp_state->ntlmssp_state->session_key.data) {
+ gensec_ntlmssp_state->have_features |= GENSEC_FEATURE_SESSION_KEY;
+ }
+
+ return status;
+}
+
+/**
+ * Return the NTLMSSP master session key
+ *
+ * @param ntlmssp_state NTLMSSP State
+ */
+
+NTSTATUS gensec_ntlmssp_session_key(struct gensec_security *gensec_security,
+ DATA_BLOB *session_key)
+{
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
+ struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp_state->ntlmssp_state;
+
+ if (!ntlmssp_state->session_key.data) {
+ return NT_STATUS_NO_USER_SESSION_KEY;
+ }
+ *session_key = ntlmssp_state->session_key;
+
+ return NT_STATUS_OK;
+}
+
+void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
+ uint32_t neg_flags, BOOL allow_lm)
+{
+ if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
+ ntlmssp_state->unicode = True;
+ } else {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
+ ntlmssp_state->unicode = False;
+ }
+
+ if ((neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) && allow_lm && !ntlmssp_state->use_ntlmv2) {
+ /* other end forcing us to use LM */
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
+ } else {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ }
+
+ if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SIGN;
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_SEAL)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SEAL;
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
+ if (neg_flags & NTLMSSP_NEGOTIATE_56) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
+ }
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_56)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_56;
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
+ }
+
+ if ((neg_flags & NTLMSSP_REQUEST_TARGET)) {
+ ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
+ }
+
+}
+
+/**
+ Weaken NTLMSSP keys to cope with down-level clients and servers.
+
+ We probably should have some parameters to control this, but as
+ it only occours for LM_KEY connections, and this is controlled
+ by the client lanman auth/lanman auth parameters, it isn't too bad.
+*/
+
+void ntlmssp_weaken_keys(struct ntlmssp_state *ntlmssp_state)
+{
+ /* Key weakening not performed on the master key for NTLM2
+ and does not occour for NTLM1. Therefore we only need
+ to do this for the LM_KEY.
+ */
+
+ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
+ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_128) {
+
+ } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_56) {
+ ntlmssp_state->session_key.data[7] = 0xa0;
+ } else { /* forty bits */
+ ntlmssp_state->session_key.data[5] = 0xe5;
+ ntlmssp_state->session_key.data[6] = 0x38;
+ ntlmssp_state->session_key.data[7] = 0xb0;
+ }
+ ntlmssp_state->session_key.length = 8;
+ }
+}
+
+static BOOL gensec_ntlmssp_have_feature(struct gensec_security *gensec_security,
+ uint32_t feature)
+{
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
+ if (gensec_ntlmssp_state->have_features & feature) {
+ return True;
+ }
+
+ return False;
+}
+
+NTSTATUS gensec_ntlmssp_start(struct gensec_security *gensec_security)
+{
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state;
+
+ gensec_ntlmssp_state = talloc(gensec_security, struct gensec_ntlmssp_state);
+ if (!gensec_ntlmssp_state) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ gensec_ntlmssp_state->ntlmssp_state = NULL;
+ gensec_ntlmssp_state->auth_context = NULL;
+ gensec_ntlmssp_state->server_info = NULL;
+ gensec_ntlmssp_state->have_features = 0;
+
+ gensec_security->private_data = gensec_ntlmssp_state;
+ return NT_STATUS_OK;
+}
+
+static const struct gensec_security_ops gensec_ntlmssp_security_ops = {
+ .name = "ntlmssp",
+ .sasl_name = "NTLM",
+ .auth_type = DCERPC_AUTH_TYPE_NTLMSSP,
+ .oid = GENSEC_OID_NTLMSSP,
+ .client_start = gensec_ntlmssp_client_start,
+ .server_start = gensec_ntlmssp_server_start,
+ .update = gensec_ntlmssp_update,
+ .sig_size = gensec_ntlmssp_sig_size,
+ .sign_packet = gensec_ntlmssp_sign_packet,
+ .check_packet = gensec_ntlmssp_check_packet,
+ .seal_packet = gensec_ntlmssp_seal_packet,
+ .unseal_packet = gensec_ntlmssp_unseal_packet,
+ .wrap = gensec_ntlmssp_wrap,
+ .unwrap = gensec_ntlmssp_unwrap,
+ .session_key = gensec_ntlmssp_session_key,
+ .session_info = gensec_ntlmssp_session_info,
+ .have_feature = gensec_ntlmssp_have_feature,
+ .enabled = True
+};
+
+
+NTSTATUS gensec_ntlmssp_init(void)
+{
+ NTSTATUS ret;
+ ret = gensec_register(&gensec_ntlmssp_security_ops);
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(0,("Failed to register '%s' gensec backend!\n",
+ gensec_ntlmssp_security_ops.name));
+ return ret;
+ }
+
+ return ret;
+}
--- /dev/null
+################################################
+# Start MODULE gensec_ntlmssp
+[MODULE::gensec_ntlmssp]
+SUBSYSTEM = GENSEC
+INIT_FUNCTION = gensec_ntlmssp_init
+INIT_OBJ_FILES = auth/ntlmssp/ntlmssp.o
+ADD_OBJ_FILES = \
+ auth/ntlmssp/ntlmssp_parse.o \
+ auth/ntlmssp/ntlmssp_sign.o \
+ auth/ntlmssp/ntlmssp_client.o \
+ auth/ntlmssp/ntlmssp_server.o
+REQUIRED_SUBSYSTEMS = AUTH
+# End MODULE gensec_ntlmssp
+################################################
--- /dev/null
+/*
+ Unix SMB/Netbios implementation.
+ Version 3.0
+ handle NLTMSSP, client server side parsing
+
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "auth/auth.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "lib/crypto/crypto.h"
+
+/*********************************************************************
+ Client side NTLMSSP
+*********************************************************************/
+
+/**
+ * Next state function for the Initial packet
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param out_mem_ctx The DATA_BLOB *out will be allocated on this context
+ * @param in The request, as a DATA_BLOB. reply.data must be NULL
+ * @param out The reply, as an talloc()ed DATA_BLOB, on out_mem_ctx
+ * @return Errors or NT_STATUS_OK.
+ */
+
+NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB in, DATA_BLOB *out)
+{
+ 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 */
+ msrpc_gen(out_mem_ctx,
+ out, "CddAA",
+ "NTLMSSP",
+ NTLMSSP_NEGOTIATE,
+ ntlmssp_state->neg_flags,
+ ntlmssp_state->get_domain(),
+ ntlmssp_state->workstation);
+
+ ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
+
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+}
+
+/**
+ * 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.
+ */
+
+NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
+ TALLOC_CTX *out_mem_ctx,
+ const DATA_BLOB in, DATA_BLOB *out)
+{
+ uint32_t chal_flags, ntlmssp_command, unkn1, unkn2;
+ DATA_BLOB server_domain_blob;
+ DATA_BLOB challenge_blob;
+ DATA_BLOB struct_blob = data_blob(NULL, 0);
+ char *server_domain;
+ const char *chal_parse_string;
+ const char *auth_gen_string;
+ uint8_t lm_hash[16];
+ DATA_BLOB lm_response = data_blob(NULL, 0);
+ DATA_BLOB nt_response = data_blob(NULL, 0);
+ DATA_BLOB session_key = data_blob(NULL, 0);
+ DATA_BLOB lm_session_key = data_blob(NULL, 0);
+ DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
+ NTSTATUS nt_status;
+
+ if (!msrpc_parse(ntlmssp_state,
+ &in, "CdBd",
+ "NTLMSSP",
+ &ntlmssp_command,
+ &server_domain_blob,
+ &chal_flags)) {
+ DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
+ dump_data(2, in.data, in.length);
+
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ 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, ntlmssp_state->allow_lm_key);
+
+ if (ntlmssp_state->unicode) {
+ if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
+ chal_parse_string = "CdUdbddB";
+ } else {
+ chal_parse_string = "CdUdbdd";
+ }
+ auth_gen_string = "CdBBUUUBd";
+ } else {
+ if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
+ chal_parse_string = "CdAdbddB";
+ } else {
+ chal_parse_string = "CdAdbdd";
+ }
+
+ auth_gen_string = "CdBBAAABd";
+ }
+
+ DEBUG(3, ("NTLMSSP: Set final flags:\n"));
+ debug_ntlmssp_flags(ntlmssp_state->neg_flags);
+
+ if (!msrpc_parse(ntlmssp_state,
+ &in, chal_parse_string,
+ "NTLMSSP",
+ &ntlmssp_command,
+ &server_domain,
+ &chal_flags,
+ &challenge_blob, 8,
+ &unkn1, &unkn2,
+ &struct_blob)) {
+ DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
+ dump_data(2, in.data, in.length);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ ntlmssp_state->server_domain = server_domain;
+
+ if (challenge_blob.length != 8) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (!ntlmssp_state->password) {
+ static const uint8_t zeros[16];
+ /* do nothing - blobs are zero length */
+
+ /* session key is all zeros */
+ session_key = data_blob_talloc(ntlmssp_state, zeros, 16);
+ lm_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(ntlmssp_state->user,
+ ntlmssp_state->domain,
+ ntlmssp_state->password, &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;
+ }
+
+ /* LM Key is incompatible... */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+
+ } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+ struct MD5Context md5_session_nonce_ctx;
+ uint8_t nt_hash[16];
+ uint8_t session_nonce[16];
+ uint8_t session_nonce_hash[16];
+ uint8_t user_session_key[16];
+ E_md4hash(ntlmssp_state->password, nt_hash);
+
+ 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(ntlmssp_state->password,
+ session_nonce_hash,
+ nt_response.data);
+
+ session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+
+ SMBsesskeygen_ntv1(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);
+
+ /* LM Key is incompatible... */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ } else {
+ uint8_t nt_hash[16];
+
+ if (ntlmssp_state->use_nt_response) {
+ nt_response = data_blob_talloc(ntlmssp_state, NULL, 24);
+ SMBNTencrypt(ntlmssp_state->password,challenge_blob.data,
+ nt_response.data);
+ E_md4hash(ntlmssp_state->password, nt_hash);
+ session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+ SMBsesskeygen_ntv1(nt_hash, session_key.data);
+ dump_data_pw("NT session key:\n", session_key.data, session_key.length);
+ }
+
+ /* lanman auth is insecure, it may be disabled */
+ if (lp_client_lanman_auth()) {
+ lm_response = data_blob_talloc(ntlmssp_state, NULL, 24);
+ if (!SMBencrypt(ntlmssp_state->password,challenge_blob.data,
+ lm_response.data)) {
+ /* If the LM password was too long (and therefore the LM hash being
+ of the first 14 chars only), don't send it */
+ data_blob_free(&lm_response);
+
+ /* LM Key is incompatible with 'long' passwords */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ } else {
+ E_deshash(ntlmssp_state->password, lm_hash);
+ lm_session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+ memcpy(lm_session_key.data, lm_hash, 8);
+ memset(&lm_session_key.data[8], '\0', 8);
+
+ if (!ntlmssp_state->use_nt_response) {
+ session_key = lm_session_key;
+ }
+ }
+ } else {
+ /* LM Key is incompatible... */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ }
+ }
+
+ if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
+ && lp_client_lanman_auth() && lm_session_key.length == 16) {
+ DATA_BLOB new_session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+ if (lm_response.length == 24) {
+ SMBsesskeygen_lm_sess_key(lm_session_key.data, lm_response.data,
+ new_session_key.data);
+ } else {
+ static const uint8_t zeros[24];
+ SMBsesskeygen_lm_sess_key(lm_session_key.data, zeros,
+ new_session_key.data);
+ }
+ new_session_key.length = 16;
+ session_key = new_session_key;
+ dump_data_pw("LM session key\n", session_key.data, session_key.length);
+ }
+
+
+ /* 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_talloc(ntlmssp_state,
+ 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(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
+ 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 */
+ session_key = data_blob_talloc(ntlmssp_state, client_session_key, sizeof(client_session_key));
+ }
+
+ /* this generates the actual auth packet */
+ if (!msrpc_gen(out_mem_ctx,
+ out, 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->workstation,
+ encrypted_session_key.data, encrypted_session_key.length,
+ ntlmssp_state->neg_flags)) {
+
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ ntlmssp_state->session_key = session_key;
+
+ /* The client might be using 56 or 40 bit weakened keys */
+ ntlmssp_weaken_keys(ntlmssp_state);
+
+ ntlmssp_state->chal = challenge_blob;
+ ntlmssp_state->lm_resp = lm_response;
+ ntlmssp_state->nt_resp = nt_response;
+
+ ntlmssp_state->expected_state = NTLMSSP_DONE;
+
+ nt_status = ntlmssp_sign_init(ntlmssp_state);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n",
+ nt_errstr(nt_status)));
+ return nt_status;
+ }
+
+ return nt_status;
+}
+
+static NTSTATUS ntlmssp_client_start(TALLOC_CTX *mem_ctx, struct ntlmssp_state **ntlmssp_state)
+{
+ *ntlmssp_state = talloc(mem_ctx, struct ntlmssp_state);
+ if (!*ntlmssp_state) {
+ DEBUG(0,("ntlmssp_client_start: talloc failed!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+ ZERO_STRUCTP(*ntlmssp_state);
+
+ (*ntlmssp_state)->role = NTLMSSP_CLIENT;
+
+ (*ntlmssp_state)->workstation = lp_netbios_name();
+ (*ntlmssp_state)->get_domain = lp_workgroup;
+
+ (*ntlmssp_state)->unicode = lp_parm_bool(-1, "ntlmssp_client", "unicode", True);
+
+ (*ntlmssp_state)->use_nt_response = lp_parm_bool(-1, "ntlmssp_client", "send_nt_reponse", True);
+
+ (*ntlmssp_state)->allow_lm_key = (lp_lanman_auth()
+ && lp_parm_bool(-1, "ntlmssp_client", "allow_lm_key", False));
+
+ (*ntlmssp_state)->use_ntlmv2 = lp_client_ntlmv2_auth();
+
+ (*ntlmssp_state)->expected_state = NTLMSSP_INITIAL;
+
+ (*ntlmssp_state)->ref_count = 1;
+
+ (*ntlmssp_state)->neg_flags =
+ NTLMSSP_NEGOTIATE_NTLM |
+ NTLMSSP_REQUEST_TARGET;
+
+ if (lp_parm_bool(-1, "ntlmssp_client", "128bit", True)) {
+ (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_128;
+ }
+
+ if (lp_parm_bool(-1, "ntlmssp_client", "keyexchange", True)) {
+ (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
+ }
+
+ if (lp_parm_bool(-1, "ntlmssp_client", "ntlm2", True)) {
+ (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
+ } else {
+ /* apparently we can't do ntlmv2 if we don't do ntlm2 */
+ (*ntlmssp_state)->use_ntlmv2 = False;
+ }
+
+ return NT_STATUS_OK;
+}
+
+NTSTATUS gensec_ntlmssp_client_start(struct gensec_security *gensec_security)
+{
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state;
+ const char *password = NULL;
+ NTSTATUS nt_status;
+
+ nt_status = gensec_ntlmssp_start(gensec_security);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ gensec_ntlmssp_state = gensec_security->private_data;
+ nt_status = ntlmssp_client_start(gensec_ntlmssp_state,
+ &gensec_ntlmssp_state->ntlmssp_state);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
+ /*
+ * 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.
+ *
+ * Without this, Windows will not create the master key
+ * that it thinks is only used for NTLMSSP signing and
+ * sealing. (It is actually pulled out and used directly)
+ */
+ gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
+ gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
+ gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
+ }
+
+ nt_status = ntlmssp_set_domain(gensec_ntlmssp_state->ntlmssp_state,
+ cli_credentials_get_domain(gensec_security->credentials));
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ nt_status = ntlmssp_set_username(gensec_ntlmssp_state->ntlmssp_state,
+ cli_credentials_get_username(gensec_security->credentials));
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ password = cli_credentials_get_password(gensec_security->credentials);
+
+ nt_status = ntlmssp_set_password(gensec_ntlmssp_state->ntlmssp_state, password);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ nt_status = ntlmssp_set_workstation(gensec_ntlmssp_state->ntlmssp_state,
+ cli_credentials_get_workstation(gensec_security->credentials));
+
+ gensec_security->private_data = gensec_ntlmssp_state;
+
+ return NT_STATUS_OK;
+}
+
--- /dev/null
+/*
+ Unix SMB/Netbios implementation.
+ Version 3.0
+ handle NLTMSSP, client server side parsing
+
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "auth/auth.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "lib/crypto/crypto.h"
+#include "pstring.h"
+
+/**
+ * Default challenge generation code.
+ *
+ */
+
+static const uint8_t *get_challenge(const struct ntlmssp_state *ntlmssp_state)
+{
+ uint8_t *chal = talloc_size(ntlmssp_state, 8);
+ generate_random_buffer(chal, 8);
+
+ return chal;
+}
+
+/**
+ * Default 'we can set the challenge to anything we like' implementation
+ *
+ */
+
+static BOOL may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
+{
+ return True;
+}
+
+/**
+ * Default 'we can set the challenge to anything we like' implementation
+ *
+ * Does not actually do anything, as the value is always in the structure anyway.
+ *
+ */
+
+static NTSTATUS set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
+{
+ SMB_ASSERT(challenge->length == 8);
+ return NT_STATUS_OK;
+}
+
+/**
+ * Determine correct target name flags for reply, given server role
+ * and negotiated flags
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param neg_flags The flags from the packet
+ * @param chal_flags The flags to be set in the reply packet
+ * @return The 'target name' string.
+ */
+
+static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
+ uint32_t neg_flags, uint32_t *chal_flags)
+{
+ if (neg_flags & NTLMSSP_REQUEST_TARGET) {
+ *chal_flags |= NTLMSSP_CHAL_TARGET_INFO;
+ *chal_flags |= NTLMSSP_REQUEST_TARGET;
+ if (ntlmssp_state->server_role == ROLE_STANDALONE) {
+ *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
+ return ntlmssp_state->server_name;
+ } else {
+ *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
+ return ntlmssp_state->get_domain();
+ };
+ } else {
+ return "";
+ }
+}
+
+/**
+ * Next state function for the Negotiate packet
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
+ * @param in The request, as a DATA_BLOB
+ * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
+ * @return Errors or MORE_PROCESSING_REQUIRED if a reply is sent.
+ */
+
+NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
+ TALLOC_CTX *out_mem_ctx,
+ const DATA_BLOB in, DATA_BLOB *out)
+{
+ DATA_BLOB struct_blob;
+ fstring dnsname, dnsdomname;
+ uint32_t neg_flags = 0;
+ uint32_t ntlmssp_command, chal_flags;
+ char *cliname=NULL, *domname=NULL;
+ const uint8_t *cryptkey;
+ const char *target_name;
+
+ /* parse the NTLMSSP packet */
+#if 0
+ file_save("ntlmssp_negotiate.dat", request.data, request.length);
+#endif
+
+ if (in.length) {
+ if (!msrpc_parse(ntlmssp_state,
+ &in, "CddAA",
+ "NTLMSSP",
+ &ntlmssp_command,
+ &neg_flags,
+ &cliname,
+ &domname)) {
+ DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP:\n"));
+ dump_data(2, in.data, in.length);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ debug_ntlmssp_flags(neg_flags);
+ }
+
+ ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, ntlmssp_state->allow_lm_key);
+
+ /* Ask our caller what challenge they would like in the packet */
+ cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
+
+ /* Check if we may set the challenge */
+ if (!ntlmssp_state->may_set_challenge(ntlmssp_state)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
+ }
+
+ /* The flags we send back are not just the negotiated flags,
+ * they are also 'what is in this packet'. Therfore, we
+ * operate on 'chal_flags' from here on
+ */
+
+ chal_flags = ntlmssp_state->neg_flags;
+
+ /* get the right name to fill in as 'target' */
+ target_name = ntlmssp_target_name(ntlmssp_state,
+ neg_flags, &chal_flags);
+ if (target_name == NULL)
+ return NT_STATUS_INVALID_PARAMETER;
+
+ ntlmssp_state->chal = data_blob_talloc(ntlmssp_state, cryptkey, 8);
+ ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state, cryptkey, 8);
+
+ /* This should be a 'netbios domain -> DNS domain' mapping */
+ dnsdomname[0] = '\0';
+ get_mydomname(dnsdomname);
+ strlower_m(dnsdomname);
+
+ dnsname[0] = '\0';
+ get_myfullname(dnsname);
+
+ /* This creates the 'blob' of names that appears at the end of the packet */
+ if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
+ {
+ const char *target_name_dns = "";
+ if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
+ target_name_dns = dnsdomname;
+ } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
+ target_name_dns = dnsname;
+ }
+
+ msrpc_gen(out_mem_ctx,
+ &struct_blob, "aaaaa",
+ NTLMSSP_NAME_TYPE_DOMAIN, target_name,
+ NTLMSSP_NAME_TYPE_SERVER, ntlmssp_state->server_name,
+ NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
+ NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
+ 0, "");
+ } else {
+ struct_blob = data_blob(NULL, 0);
+ }
+
+ {
+ /* Marshel the packet in the right format, be it unicode or ASCII */
+ const char *gen_string;
+ if (ntlmssp_state->unicode) {
+ gen_string = "CdUdbddB";
+ } else {
+ gen_string = "CdAdbddB";
+ }
+
+ msrpc_gen(out_mem_ctx,
+ out, gen_string,
+ "NTLMSSP",
+ NTLMSSP_CHALLENGE,
+ target_name,
+ chal_flags,
+ cryptkey, 8,
+ 0, 0,
+ struct_blob.data, struct_blob.length);
+ }
+
+ ntlmssp_state->expected_state = NTLMSSP_AUTH;
+
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+}
+
+/**
+ * Next state function for the Authenticate packet
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param request The request, as a DATA_BLOB
+ * @return Errors or NT_STATUS_OK.
+ */
+
+static NTSTATUS ntlmssp_server_preauth(struct ntlmssp_state *ntlmssp_state,
+ const DATA_BLOB request)
+{
+ uint32_t ntlmssp_command, auth_flags;
+ NTSTATUS nt_status;
+
+ uint8_t session_nonce_hash[16];
+
+ const char *parse_string;
+ char *domain = NULL;
+ char *user = NULL;
+ char *workstation = NULL;
+
+#if 0
+ file_save("ntlmssp_auth.dat", request.data, request.length);
+#endif
+
+ if (ntlmssp_state->unicode) {
+ parse_string = "CdBBUUUBd";
+ } else {
+ parse_string = "CdBBAAABd";
+ }
+
+ /* zero these out */
+ data_blob_free(&ntlmssp_state->lm_resp);
+ data_blob_free(&ntlmssp_state->nt_resp);
+
+ ntlmssp_state->user = NULL;
+ ntlmssp_state->domain = NULL;
+ ntlmssp_state->workstation = NULL;
+
+ /* now the NTLMSSP encoded auth hashes */
+ if (!msrpc_parse(ntlmssp_state,
+ &request, parse_string,
+ "NTLMSSP",
+ &ntlmssp_command,
+ &ntlmssp_state->lm_resp,
+ &ntlmssp_state->nt_resp,
+ &domain,
+ &user,
+ &workstation,
+ &ntlmssp_state->encrypted_session_key,
+ &auth_flags)) {
+ DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
+ dump_data(10, request.data, request.length);
+
+ /* zero this out */
+ data_blob_free(&ntlmssp_state->encrypted_session_key);
+ auth_flags = 0;
+
+ /* Try again with a shorter string (Win9X truncates this packet) */
+ if (ntlmssp_state->unicode) {
+ parse_string = "CdBBUUU";
+ } else {
+ parse_string = "CdBBAAA";
+ }
+
+ /* now the NTLMSSP encoded auth hashes */
+ if (!msrpc_parse(ntlmssp_state,
+ &request, parse_string,
+ "NTLMSSP",
+ &ntlmssp_command,
+ &ntlmssp_state->lm_resp,
+ &ntlmssp_state->nt_resp,
+ &domain,
+ &user,
+ &workstation)) {
+ DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
+ dump_data(2, request.data, request.length);
+
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ }
+
+ if (auth_flags)
+ ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, ntlmssp_state->allow_lm_key);
+
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
+ /* zero this out */
+ data_blob_free(&ntlmssp_state->encrypted_session_key);
+ return nt_status;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
+ /* zero this out */
+ data_blob_free(&ntlmssp_state->encrypted_session_key);
+ return nt_status;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(ntlmssp_state, workstation))) {
+ /* zero this out */
+ data_blob_free(&ntlmssp_state->encrypted_session_key);
+ return nt_status;
+ }
+
+ DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
+ ntlmssp_state->user, ntlmssp_state->domain, ntlmssp_state->workstation, (unsigned long)ntlmssp_state->lm_resp.length, (unsigned long)ntlmssp_state->nt_resp.length));
+
+#if 0
+ file_save("nthash1.dat", &ntlmssp_state->nt_resp.data, &ntlmssp_state->nt_resp.length);
+ file_save("lmhash1.dat", &ntlmssp_state->lm_resp.data, &ntlmssp_state->lm_resp.length);
+#endif
+
+ /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
+ client challenge
+
+ However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
+ */
+ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+ if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
+ struct MD5Context md5_session_nonce_ctx;
+ SMB_ASSERT(ntlmssp_state->internal_chal.data
+ && ntlmssp_state->internal_chal.length == 8);
+
+ ntlmssp_state->doing_ntlm2 = True;
+
+ memcpy(ntlmssp_state->session_nonce, ntlmssp_state->internal_chal.data, 8);
+ memcpy(&ntlmssp_state->session_nonce[8], ntlmssp_state->lm_resp.data, 8);
+
+ MD5Init(&md5_session_nonce_ctx);
+ MD5Update(&md5_session_nonce_ctx, ntlmssp_state->session_nonce, 16);
+ MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
+
+ ntlmssp_state->chal = data_blob_talloc(ntlmssp_state,
+ session_nonce_hash, 8);
+
+ /* LM response is no longer useful, zero it out */
+ data_blob_free(&ntlmssp_state->lm_resp);
+
+ /* We changed the effective challenge - set it */
+ if (!NT_STATUS_IS_OK(nt_status =
+ ntlmssp_state->set_challenge(ntlmssp_state,
+ &ntlmssp_state->chal))) {
+ /* zero this out */
+ data_blob_free(&ntlmssp_state->encrypted_session_key);
+ return nt_status;
+ }
+
+ /* LM Key is incompatible... */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ }
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Next state function for the Authenticate packet
+ * (after authentication - figures out the session keys etc)
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @return Errors or NT_STATUS_OK.
+ */
+
+static NTSTATUS ntlmssp_server_postauth(struct ntlmssp_state *ntlmssp_state,
+ DATA_BLOB *user_session_key,
+ DATA_BLOB *lm_session_key)
+{
+ NTSTATUS nt_status;
+ DATA_BLOB session_key = data_blob(NULL, 0);
+
+ if (user_session_key)
+ dump_data_pw("USER session key:\n", user_session_key->data, user_session_key->length);
+
+ if (lm_session_key)
+ dump_data_pw("LM first-8:\n", lm_session_key->data, lm_session_key->length);
+
+ /* Handle the different session key derivation for NTLM2 */
+ if (ntlmssp_state->doing_ntlm2) {
+ if (user_session_key && user_session_key->data && user_session_key->length == 16) {
+ session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+ hmac_md5(user_session_key->data, ntlmssp_state->session_nonce,
+ sizeof(ntlmssp_state->session_nonce), session_key.data);
+ DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
+ dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
+
+ } else {
+ DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
+ session_key = data_blob(NULL, 0);
+ }
+ } else if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
+ /* Ensure we can never get here on NTLMv2 */
+ && (ntlmssp_state->nt_resp.length == 0 || ntlmssp_state->nt_resp.length == 24)) {
+
+ if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) {
+ if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
+ session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+ SMBsesskeygen_lm_sess_key(lm_session_key->data, ntlmssp_state->lm_resp.data,
+ session_key.data);
+ DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
+ dump_data_pw("LM session key:\n", session_key.data, session_key.length);
+ } else {
+
+ /* When there is no LM response, just use zeros */
+ static const uint8_t zeros[24];
+ session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+ SMBsesskeygen_lm_sess_key(zeros, zeros,
+ session_key.data);
+ DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
+ dump_data_pw("LM session key:\n", session_key.data, session_key.length);
+ }
+ } else {
+ /* LM Key not selected */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+
+ DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
+ session_key = data_blob(NULL, 0);
+ }
+
+ } else if (user_session_key && user_session_key->data) {
+ session_key = *user_session_key;
+ DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
+ dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
+
+ /* LM Key not selected */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+
+ } else if (lm_session_key && lm_session_key->data) {
+ /* Very weird to have LM key, but no user session key, but anyway.. */
+ session_key = *lm_session_key;
+ DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
+ dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
+
+ /* LM Key not selected */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+
+ } else {
+ DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
+ session_key = data_blob(NULL, 0);
+
+ /* LM Key not selected */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ }
+
+ /* With KEY_EXCH, the client supplies the proposed session key,
+ but encrypts it with the long-term key */
+ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
+ if (!ntlmssp_state->encrypted_session_key.data
+ || ntlmssp_state->encrypted_session_key.length != 16) {
+ data_blob_free(&ntlmssp_state->encrypted_session_key);
+ DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
+ ntlmssp_state->encrypted_session_key.length));
+ return NT_STATUS_INVALID_PARAMETER;
+ } else if (!session_key.data || session_key.length != 16) {
+ DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
+ session_key.length));
+ ntlmssp_state->session_key = session_key;
+ } else {
+ dump_data_pw("KEY_EXCH session key (enc):\n",
+ ntlmssp_state->encrypted_session_key.data,
+ ntlmssp_state->encrypted_session_key.length);
+ arcfour_crypt(ntlmssp_state->encrypted_session_key.data,
+ session_key.data,
+ ntlmssp_state->encrypted_session_key.length);
+ ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state,
+ ntlmssp_state->encrypted_session_key.data,
+ ntlmssp_state->encrypted_session_key.length);
+ dump_data_pw("KEY_EXCH session key:\n", ntlmssp_state->encrypted_session_key.data,
+ ntlmssp_state->encrypted_session_key.length);
+ }
+ } else {
+ ntlmssp_state->session_key = session_key;
+ }
+
+ /* The server might need us to use a partial-strength session key */
+ ntlmssp_weaken_keys(ntlmssp_state);
+
+ nt_status = ntlmssp_sign_init(ntlmssp_state);
+
+ data_blob_free(&ntlmssp_state->encrypted_session_key);
+
+ /* allow arbitarily many authentications, but watch that this will cause a
+ memory leak, until the ntlmssp_state is shutdown
+ */
+
+ if (ntlmssp_state->server_multiple_authentications) {
+ ntlmssp_state->expected_state = NTLMSSP_AUTH;
+ } else {
+ ntlmssp_state->expected_state = NTLMSSP_DONE;
+ }
+
+ return nt_status;
+}
+
+
+/**
+ * Next state function for the Authenticate packet
+ *
+ * @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_server_auth(struct ntlmssp_state *ntlmssp_state,
+ TALLOC_CTX *out_mem_ctx,
+ const DATA_BLOB in, DATA_BLOB *out)
+{
+ DATA_BLOB user_session_key = data_blob(NULL, 0);
+ DATA_BLOB lm_session_key = data_blob(NULL, 0);
+ NTSTATUS nt_status;
+
+ /* zero the outbound NTLMSSP packet */
+ *out = data_blob_talloc(out_mem_ctx, NULL, 0);
+
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(ntlmssp_state, in))) {
+ return nt_status;
+ }
+
+ /*
+ * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
+ * is required (by "ntlm auth = no" and "lm auth = no" being set in the
+ * smb.conf file) and no NTLMv2 response was sent then the password check
+ * will fail here. JRA.
+ */
+
+ /* Finally, actually ask if the password is OK */
+
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state,
+ &user_session_key, &lm_session_key))) {
+ return nt_status;
+ }
+
+ if (ntlmssp_state->server_use_session_keys) {
+ return ntlmssp_server_postauth(ntlmssp_state, &user_session_key, &lm_session_key);
+ } else {
+ ntlmssp_state->session_key = data_blob(NULL, 0);
+ return NT_STATUS_OK;
+ }
+}
+
+/**
+ * Create an NTLMSSP state machine
+ *
+ * @param ntlmssp_state NTLMSSP State, allocated by this function
+ */
+
+static NTSTATUS ntlmssp_server_start(TALLOC_CTX *mem_ctx, struct ntlmssp_state **ntlmssp_state)
+{
+ *ntlmssp_state = talloc(mem_ctx, struct ntlmssp_state);
+ if (!*ntlmssp_state) {
+ DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+ ZERO_STRUCTP(*ntlmssp_state);
+
+ (*ntlmssp_state)->role = NTLMSSP_SERVER;
+
+ (*ntlmssp_state)->get_challenge = get_challenge;
+ (*ntlmssp_state)->set_challenge = set_challenge;
+ (*ntlmssp_state)->may_set_challenge = may_set_challenge;
+
+ (*ntlmssp_state)->workstation = NULL;
+ (*ntlmssp_state)->server_name = lp_netbios_name();
+
+ (*ntlmssp_state)->get_domain = lp_workgroup;
+ (*ntlmssp_state)->server_role = ROLE_DOMAIN_MEMBER; /* a good default */
+
+ (*ntlmssp_state)->expected_state = NTLMSSP_NEGOTIATE;
+
+ (*ntlmssp_state)->allow_lm_key = (lp_lanman_auth()
+ && lp_parm_bool(-1, "ntlmssp_server", "allow_lm_key", False));
+
+ (*ntlmssp_state)->server_use_session_keys = True;
+ (*ntlmssp_state)->server_multiple_authentications = False;
+
+ (*ntlmssp_state)->ref_count = 1;
+
+ (*ntlmssp_state)->neg_flags =
+ NTLMSSP_NEGOTIATE_NTLM;
+
+ if (lp_parm_bool(-1, "ntlmssp_server", "128bit", True)) {
+ (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_128;
+ }
+
+ if (lp_parm_bool(-1, "ntlmssp_server", "keyexchange", True)) {
+ (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
+ }
+
+ if (lp_parm_bool(-1, "ntlmssp_server", "ntlm2", True)) {
+ (*ntlmssp_state)->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
+ }
+
+ return NT_STATUS_OK;
+}
+
+/**
+ * Return the challenge as determined by the authentication subsystem
+ * @return an 8 byte random challenge
+ */
+
+static const uint8_t *auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state)
+{
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state = ntlmssp_state->auth_context;
+ NTSTATUS status;
+ const uint8_t *chal;
+
+ status = auth_get_challenge(gensec_ntlmssp_state->auth_context, &chal);
+ if (!NT_STATUS_IS_OK(status)) {
+ return NULL;
+ }
+
+ return chal;
+}
+
+/**
+ * Some authentication methods 'fix' the challenge, so we may not be able to set it
+ *
+ * @return If the effective challenge used by the auth subsystem may be modified
+ */
+static BOOL auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
+{
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state = ntlmssp_state->auth_context;
+
+ return auth_challenge_may_be_modified(gensec_ntlmssp_state->auth_context);
+}
+
+/**
+ * NTLM2 authentication modifies the effective challenge,
+ * @param challenge The new challenge value
+ */
+static NTSTATUS auth_ntlmssp_set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
+{
+ NTSTATUS nt_status;
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state = ntlmssp_state->auth_context;
+ struct auth_context *auth_context = gensec_ntlmssp_state->auth_context;
+ const uint8_t *chal;
+
+ if (challenge->length != 8) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ chal = challenge->data;
+
+ nt_status = auth_context_set_challenge(auth_context, chal, "NTLMSSP callback (NTLM2)");
+
+ return nt_status;
+}
+
+/**
+ * Check the password on an NTLMSSP login.
+ *
+ * Return the session keys used on the connection.
+ */
+
+static NTSTATUS auth_ntlmssp_check_password(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
+{
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state = ntlmssp_state->auth_context;
+ struct auth_usersupplied_info *user_info = NULL;
+ NTSTATUS nt_status;
+
+ nt_status = make_user_info_map(ntlmssp_state,
+ gensec_ntlmssp_state->ntlmssp_state->user,
+ gensec_ntlmssp_state->ntlmssp_state->domain,
+ gensec_ntlmssp_state->ntlmssp_state->workstation,
+ gensec_ntlmssp_state->ntlmssp_state->lm_resp.data ? &gensec_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
+ gensec_ntlmssp_state->ntlmssp_state->nt_resp.data ? &gensec_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
+ NULL, NULL, NULL, True,
+ &user_info);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ nt_status = auth_check_password(gensec_ntlmssp_state->auth_context, gensec_ntlmssp_state,
+ user_info, &gensec_ntlmssp_state->server_info);
+ talloc_free(user_info);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ if (gensec_ntlmssp_state->server_info->user_session_key.length) {
+ DEBUG(10, ("Got NT session key of length %u\n", gensec_ntlmssp_state->server_info->user_session_key.length));
+ *user_session_key = data_blob_talloc(ntlmssp_state,
+ gensec_ntlmssp_state->server_info->user_session_key.data,
+ gensec_ntlmssp_state->server_info->user_session_key.length);
+ }
+ if (gensec_ntlmssp_state->server_info->lm_session_key.length) {
+ DEBUG(10, ("Got LM session key of length %u\n", gensec_ntlmssp_state->server_info->lm_session_key.length));
+ *lm_session_key = data_blob_talloc(ntlmssp_state,
+ gensec_ntlmssp_state->server_info->lm_session_key.data,
+ gensec_ntlmssp_state->server_info->lm_session_key.length);
+ }
+ return nt_status;
+}
+
+NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
+{
+ NTSTATUS nt_status;
+ struct ntlmssp_state *ntlmssp_state;
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state;
+
+ nt_status = gensec_ntlmssp_start(gensec_security);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ gensec_ntlmssp_state = gensec_security->private_data;
+
+ nt_status = ntlmssp_server_start(gensec_ntlmssp_state, &gensec_ntlmssp_state->ntlmssp_state);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
+ gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
+ gensec_ntlmssp_state->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
+ }
+
+ nt_status = auth_context_create(gensec_ntlmssp_state, lp_auth_methods(), &gensec_ntlmssp_state->auth_context);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ ntlmssp_state = gensec_ntlmssp_state->ntlmssp_state;
+ ntlmssp_state->auth_context = gensec_ntlmssp_state;
+ ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
+ ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
+ ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
+ ntlmssp_state->check_password = auth_ntlmssp_check_password;
+ ntlmssp_state->server_role = lp_server_role();
+
+ return NT_STATUS_OK;
+}
+
+/**
+ * Return the credentials of a logged on user, including session keys
+ * etc.
+ *
+ * Only valid after a successful authentication
+ *
+ * May only be called once per authentication.
+ *
+ */
+
+NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
+ struct auth_session_info **session_info)
+{
+ NTSTATUS nt_status;
+ struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
+
+ nt_status = auth_generate_session_info(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info, session_info);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ (*session_info)->session_key = data_blob_talloc(*session_info,
+ gensec_ntlmssp_state->ntlmssp_state->session_key.data,
+ gensec_ntlmssp_state->ntlmssp_state->session_key.length);
+
+ return NT_STATUS_OK;
+}
#include "includes.h"
#include "auth/auth.h"
+#include "auth/ntlmssp/ntlmssp.h"
#include "lib/crypto/crypto.h"
#define CLI_SIGN "session key to client-to-server signing key magic constant"
"nbt_server/config.mk",
"auth/gensec/gensec.mk",
"auth/kerberos/kerberos.mk",
+ "auth/ntlmssp/ntlmssp.mk",
"libcli/auth/config.mk",
"libcli/ldap/config.mk",
"libcli/config.mk",
#include "includes.h"
#include "auth/auth.h"
+#include "auth/ntlmssp/ntlmssp.h"
#include "lib/cmdline/popt_common.h"
BOOL torture_ntlmssp_self_check(void)
git.samba.org / ab / samba.git / .git / commitdiff