-/*
+/*
Unix SMB/Netbios implementation.
Version 3.0
handle NLTMSSP, server side
Copyright (C) Andrew Tridgell 2001
Copyright (C) Andrew Bartlett 2001-2003
+ Copyright (C) Andrew Bartlett 2005 (Updated from gensec).
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "../librpc/gen_ndr/ndr_ntlmssp.h"
+#include "../libcli/auth/ntlmssp_ndr.h"
+
+static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
+ DATA_BLOB reply, DATA_BLOB *next_request);
+static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
+ const DATA_BLOB in, DATA_BLOB *out);
+static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
+ const DATA_BLOB reply, DATA_BLOB *next_request);
+static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
+ const DATA_BLOB request, DATA_BLOB *reply);
/**
- * Print out the NTLMSSP flags for debugging
+ * Callbacks for NTLMSSP - for both client and server operating modes
+ *
+ */
+
+static const struct ntlmssp_callbacks {
+ enum NTLMSSP_ROLE role;
+ enum NTLM_MESSAGE_TYPE ntlmssp_command;
+ NTSTATUS (*fn)(struct ntlmssp_state *ntlmssp_state,
+ 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},
+ {NTLMSSP_CLIENT, NTLMSSP_UNKNOWN, NULL},
+ {NTLMSSP_SERVER, NTLMSSP_UNKNOWN, NULL}
+};
+
+
+/**
+ * Print out the NTLMSSP flags for debugging
* @param neg_flags The flags from the packet
*/
void debug_ntlmssp_flags(uint32 neg_flags)
{
DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
-
- if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE)
+
+ if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_UNICODE\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_OEM)
+ if (neg_flags & NTLMSSP_NEGOTIATE_OEM)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM\n"));
- if (neg_flags & NTLMSSP_REQUEST_TARGET)
+ if (neg_flags & NTLMSSP_REQUEST_TARGET)
DEBUGADD(4, (" NTLMSSP_REQUEST_TARGET\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_SIGN)
+ if (neg_flags & NTLMSSP_NEGOTIATE_SIGN)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SIGN\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_SEAL)
+ if (neg_flags & NTLMSSP_NEGOTIATE_SEAL)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SEAL\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
+ if (neg_flags & NTLMSSP_NEGOTIATE_DATAGRAM)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_DATAGRAM\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_LM_KEY\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NETWARE)
+ if (neg_flags & NTLMSSP_NEGOTIATE_NETWARE)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NETWARE\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NTLM)
+ 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)
+ if (neg_flags & NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_OEM_WORKSTATION_SUPPLIED)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM_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)
+ if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_ALWAYS_SIGN\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
+ if (neg_flags & NTLMSSP_REQUEST_NON_NT_SESSION_KEY)
+ DEBUGADD(4, (" NTLMSSP_REQUEST_NON_NT_SESSION_KEY\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)
+ if (neg_flags & NTLMSSP_NEGOTIATE_TARGET_INFO)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_TARGET_INFO\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_VERSION)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_VERSION\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_128)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_128\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)
+ if (neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)
DEBUGADD(4, (" NTLMSSP_NEGOTIATE_KEY_EXCH\n"));
+ if (neg_flags & NTLMSSP_NEGOTIATE_56)
+ DEBUGADD(4, (" NTLMSSP_NEGOTIATE_56\n"));
}
/**
* Default challenge generation code.
*
*/
-
-static const uint8 *get_challenge(struct ntlmssp_state *ntlmssp_state)
+
+static void get_challenge(const struct ntlmssp_state *ntlmssp_state,
+ uint8_t chal[8])
+{
+ generate_random_buffer(chal, 8);
+}
+
+/**
+ * Default 'we can set the challenge to anything we like' implementation
+ *
+ */
+
+static bool may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
{
- static uchar chal[8];
- generate_random_buffer(chal, sizeof(chal), False);
+ return True;
+}
- return chal;
+/**
+ * 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
+ * Set a username on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+
+NTSTATUS ntlmssp_set_username(NTLMSSP_STATE *ntlmssp_state, const char *user)
+{
+ ntlmssp_state->user = talloc_strdup(ntlmssp_state, user ? user : "" );
+ if (!ntlmssp_state->user) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Store NT and LM hashes on an NTLMSSP context - ensures they are talloc()ed
+ *
+ */
+NTSTATUS ntlmssp_set_hashes(NTLMSSP_STATE *ntlmssp_state,
+ const unsigned char lm_hash[16],
+ const unsigned char nt_hash[16])
+{
+ ntlmssp_state->lm_hash = (unsigned char *)
+ TALLOC_MEMDUP(ntlmssp_state, lm_hash, 16);
+ ntlmssp_state->nt_hash = (unsigned char *)
+ TALLOC_MEMDUP(ntlmssp_state, nt_hash, 16);
+ if (!ntlmssp_state->lm_hash || !ntlmssp_state->nt_hash) {
+ TALLOC_FREE(ntlmssp_state->lm_hash);
+ TALLOC_FREE(ntlmssp_state->nt_hash);
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Converts a password to the hashes on an NTLMSSP context.
+ *
+ */
+NTSTATUS ntlmssp_set_password(NTLMSSP_STATE *ntlmssp_state, const char *password)
+{
+ if (!password) {
+ ntlmssp_state->lm_hash = NULL;
+ ntlmssp_state->nt_hash = NULL;
+ } else {
+ unsigned char lm_hash[16];
+ unsigned char nt_hash[16];
+
+ E_deshash(password, lm_hash);
+ E_md4hash(password, nt_hash);
+ return ntlmssp_set_hashes(ntlmssp_state, lm_hash, nt_hash);
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Set a domain on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+NTSTATUS ntlmssp_set_domain(NTLMSSP_STATE *ntlmssp_state, const char *domain)
+{
+ ntlmssp_state->domain = talloc_strdup(ntlmssp_state,
+ domain ? domain : "" );
+ if (!ntlmssp_state->domain) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+NTSTATUS ntlmssp_set_workstation(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(NTLMSSP_STATE *ntlmssp_state,
+ DATA_BLOB response)
+{
+ ntlmssp_state->stored_response = data_blob_talloc(ntlmssp_state,
+ response.data,
+ response.length);
+ return NT_STATUS_OK;
+}
+
+/**
+ * Request features for the NTLMSSP negotiation
+ *
+ * @param ntlmssp_state NTLMSSP state
+ * @param feature_list List of space seperated features requested from NTLMSSP.
+ */
+void ntlmssp_want_feature_list(NTLMSSP_STATE *ntlmssp_state, char *feature_list)
+{
+ /*
+ * We need to set this to allow a later SetPassword
+ * via the SAMR pipe to succeed. Strange.... We could
+ * also add NTLMSSP_NEGOTIATE_SEAL here. JRA.
+ */
+ if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, True)) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+ }
+ if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, True)) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+ }
+ if(in_list("NTLMSSP_FEATURE_SEAL", feature_list, True)) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
+ }
+}
+
+/**
+ * Request a feature for the NTLMSSP negotiation
+ *
+ * @param ntlmssp_state NTLMSSP state
+ * @param feature Bit flag specifying the requested feature
+ */
+void ntlmssp_want_feature(NTLMSSP_STATE *ntlmssp_state, uint32 feature)
+{
+ /* As per JRA's comment above */
+ if (feature & NTLMSSP_FEATURE_SESSION_KEY) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+ }
+ if (feature & NTLMSSP_FEATURE_SIGN) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+ }
+ if (feature & NTLMSSP_FEATURE_SEAL) {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
+ }
+}
+
+/**
+ * Next state function for the NTLMSSP state machine
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param in The packet in from the NTLMSSP partner, as a DATA_BLOB
+ * @param out The reply, as an allocated DATA_BLOB, caller to free.
+ * @return Errors, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
+ */
+
+NTSTATUS ntlmssp_update(NTLMSSP_STATE *ntlmssp_state,
+ const DATA_BLOB in, DATA_BLOB *out)
+{
+ DATA_BLOB input;
+ uint32 ntlmssp_command;
+ int i;
+
+ if (ntlmssp_state->expected_state == NTLMSSP_DONE) {
+ /* Called update after negotiations finished. */
+ DEBUG(1, ("Called NTLMSSP after state machine was 'done'\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ *out = data_blob_null;
+
+ if (!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;
+ } 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; ntlmssp_callbacks[i].fn; i++) {
+ if (ntlmssp_callbacks[i].role == ntlmssp_state->role
+ && ntlmssp_callbacks[i].ntlmssp_command == ntlmssp_command) {
+ return ntlmssp_callbacks[i].fn(ntlmssp_state, input, out);
+ }
+ }
+
+ DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
+ ntlmssp_state->role, ntlmssp_command));
+
+ return NT_STATUS_INVALID_PARAMETER;
+}
+
+/**
+ * End an NTLMSSP state machine
+ *
+ * @param ntlmssp_state NTLMSSP State, free()ed by this function
+ */
+
+void ntlmssp_end(NTLMSSP_STATE **ntlmssp_state)
+{
+ (*ntlmssp_state)->ref_count--;
+
+ if ((*ntlmssp_state)->ref_count == 0) {
+ data_blob_free(&(*ntlmssp_state)->chal);
+ data_blob_free(&(*ntlmssp_state)->lm_resp);
+ data_blob_free(&(*ntlmssp_state)->nt_resp);
+ TALLOC_FREE(*ntlmssp_state);
+ }
+
+ *ntlmssp_state = NULL;
+ return;
+}
+
+/**
+ * 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
*/
static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
- uint32 neg_flags, uint32 *chal_flags)
+ uint32 neg_flags, uint32 *chal_flags)
{
if (neg_flags & NTLMSSP_REQUEST_TARGET) {
- *chal_flags |= NTLMSSP_CHAL_TARGET_INFO;
+ *chal_flags |= NTLMSSP_NEGOTIATE_TARGET_INFO;
*chal_flags |= NTLMSSP_REQUEST_TARGET;
if (ntlmssp_state->server_role == ROLE_STANDALONE) {
*chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
}
}
+static void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
+ uint32 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) {
+ /* other end forcing us to use LM */
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
+ ntlmssp_state->use_ntlmv2 = False;
+ } 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_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_KEY_EXCH)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
+ }
+
+ 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;
+ }
+
+ /* Woop Woop - unknown flag for Windows compatibility...
+ What does this really do ? JRA. */
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_VERSION)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_VERSION;
+ }
+
+ 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.
+*/
+
+DATA_BLOB ntlmssp_weaken_keys(NTLMSSP_STATE *ntlmssp_state, TALLOC_CTX *mem_ctx)
+{
+ DATA_BLOB weakened_key = data_blob_talloc(mem_ctx,
+ ntlmssp_state->session_key.data,
+ ntlmssp_state->session_key.length);
+
+ /* Nothing to weaken. We certainly don't want to 'extend' the length... */
+ if (weakened_key.length < 16) {
+ /* perhaps there was no key? */
+ return weakened_key;
+ }
+
+ /* 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) {
+ /* LM key doesn't support 128 bit crypto, so this is
+ * the best we can do. If you negotiate 128 bit, but
+ * not 56, you end up with 40 bit... */
+ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_56) {
+ weakened_key.data[7] = 0xa0;
+ } else { /* forty bits */
+ weakened_key.data[5] = 0xe5;
+ weakened_key.data[6] = 0x38;
+ weakened_key.data[7] = 0xb0;
+ }
+ weakened_key.length = 8;
+ }
+ return weakened_key;
+}
+
/**
* Next state function for the Negotiate packet
- *
+ *
* @param ntlmssp_state NTLMSSP State
* @param request The request, as a DATA_BLOB
* @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors or MORE_PROCESSING_REQUIRED if a reply is sent.
+ * @return Errors or MORE_PROCESSING_REQUIRED if a reply is sent.
*/
static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
- const DATA_BLOB request, DATA_BLOB *reply)
+ const DATA_BLOB request, DATA_BLOB *reply)
{
DATA_BLOB struct_blob;
- fstring dnsname, dnsdomname;
+ const char *dnsname;
+ char *dnsdomname = NULL;
uint32 neg_flags = 0;
uint32 ntlmssp_command, chal_flags;
- char *cliname=NULL, *domname=NULL;
- const uint8 *cryptkey;
+ uint8_t cryptkey[8];
const char *target_name;
+ struct NEGOTIATE_MESSAGE negotiate;
+ struct CHALLENGE_MESSAGE challenge;
/* parse the NTLMSSP packet */
#if 0
#endif
if (request.length) {
- if (!msrpc_parse(&request, "CddAA",
- "NTLMSSP",
- &ntlmssp_command,
- &neg_flags,
- &cliname,
- &domname)) {
- DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP:\n"));
+ if ((request.length < 16) || !msrpc_parse(ntlmssp_state, &request, "Cdd",
+ "NTLMSSP",
+ &ntlmssp_command,
+ &neg_flags)) {
+ DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP Negotiate of length %u\n",
+ (unsigned int)request.length));
dump_data(2, request.data, request.length);
return NT_STATUS_INVALID_PARAMETER;
}
-
- SAFE_FREE(cliname);
- SAFE_FREE(domname);
-
debug_ntlmssp_flags(neg_flags);
+
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_NEGOTIATE_MESSAGE(&request,
+ ntlmssp_state,
+ NULL,
+ &negotiate)))
+ {
+ NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE, &negotiate);
+ }
+ }
}
-
- cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
- data_blob_free(&ntlmssp_state->chal);
- ntlmssp_state->chal = data_blob(cryptkey, 8);
-
- /* Give them the challenge. For now, ignore neg_flags and just
- return the flags we want. Obviously this is not correct */
-
- chal_flags =
- NTLMSSP_NEGOTIATE_128 |
- NTLMSSP_NEGOTIATE_NTLM;
-
- if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
- chal_flags |= NTLMSSP_NEGOTIATE_UNICODE;
- ntlmssp_state->unicode = True;
- } else {
- chal_flags |= NTLMSSP_NEGOTIATE_OEM;
+ ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, lp_lanman_auth());
+
+ /* Ask our caller what challenge they would like in the packet */
+ ntlmssp_state->get_challenge(ntlmssp_state, cryptkey);
+
+ /* Check if we may set the challenge */
+ if (!ntlmssp_state->may_set_challenge(ntlmssp_state)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
}
- target_name = ntlmssp_target_name(ntlmssp_state,
- neg_flags, &chal_flags);
+ /* 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);
+ dnsdomname = get_mydnsdomname(ntlmssp_state);
+ if (!dnsdomname) {
+ dnsdomname = talloc_strdup(ntlmssp_state, "");
+ }
+ if (!dnsdomname) {
+ return NT_STATUS_NO_MEMORY;
+ }
strlower_m(dnsdomname);
-
- dnsname[0] = '\0';
- get_myfullname(dnsname);
- strlower_m(dnsname);
-
- 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(&struct_blob, "aaaaa",
- ntlmssp_state->unicode, NTLMSSP_NAME_TYPE_DOMAIN, target_name,
- ntlmssp_state->unicode, NTLMSSP_NAME_TYPE_SERVER, ntlmssp_state->get_global_myname(),
- ntlmssp_state->unicode, NTLMSSP_NAME_TYPE_DOMAIN_DNS, target_name_dns,
- ntlmssp_state->unicode, NTLMSSP_NAME_TYPE_SERVER_DNS, dnsdomname,
- ntlmssp_state->unicode, 0, "");
+ dnsname = get_mydnsfullname();
+ if (!dnsname) {
+ dnsname = "";
+ }
+
+ /* This creates the 'blob' of names that appears at the end of the packet */
+ if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO)
+ {
+ msrpc_gen(ntlmssp_state, &struct_blob, "aaaaa",
+ MsvAvNbDomainName, target_name,
+ MsvAvNbComputerName, ntlmssp_state->get_global_myname(),
+ MsvAvDnsDomainName, dnsdomname,
+ MsvAvDnsComputerName, dnsname,
+ MsvAvEOL, "");
} else {
- struct_blob = data_blob(NULL, 0);
+ struct_blob = data_blob_null;
}
{
+ /* 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(reply, gen_string,
- "NTLMSSP",
+
+ msrpc_gen(ntlmssp_state, reply, gen_string,
+ "NTLMSSP",
NTLMSSP_CHALLENGE,
target_name,
chal_flags,
cryptkey, 8,
0, 0,
struct_blob.data, struct_blob.length);
+
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_CHALLENGE_MESSAGE(reply,
+ ntlmssp_state,
+ NULL,
+ &challenge)))
+ {
+ NDR_PRINT_DEBUG(CHALLENGE_MESSAGE, &challenge);
+ }
+ }
}
-
+
data_blob_free(&struct_blob);
ntlmssp_state->expected_state = NTLMSSP_AUTH;
/**
* Next state function for the Authenticate packet
- *
+ *
* @param ntlmssp_state NTLMSSP State
* @param request The request, as a DATA_BLOB
* @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors or NT_STATUS_OK.
+ * @return Errors or NT_STATUS_OK.
*/
static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
- const DATA_BLOB request, DATA_BLOB *reply)
+ const DATA_BLOB request, DATA_BLOB *reply)
{
- DATA_BLOB sess_key;
- uint32 ntlmssp_command, neg_flags;
- NTSTATUS nt_status;
+ DATA_BLOB encrypted_session_key = data_blob_null;
+ DATA_BLOB user_session_key = data_blob_null;
+ DATA_BLOB lm_session_key = data_blob_null;
+ DATA_BLOB session_key = data_blob_null;
+ uint32 ntlmssp_command, auth_flags;
+ NTSTATUS nt_status = NT_STATUS_OK;
+ struct AUTHENTICATE_MESSAGE authenticate;
+
+ /* used by NTLM2 */
+ bool doing_ntlm2 = False;
+
+ uchar session_nonce[16];
+ uchar session_nonce_hash[16];
const char *parse_string;
/* parse the NTLMSSP packet */
+ *reply = data_blob_null;
+
#if 0
file_save("ntlmssp_auth.dat", request.data, request.length);
#endif
data_blob_free(&ntlmssp_state->lm_resp);
data_blob_free(&ntlmssp_state->nt_resp);
- SAFE_FREE(ntlmssp_state->user);
- SAFE_FREE(ntlmssp_state->domain);
- SAFE_FREE(ntlmssp_state->workstation);
+ ntlmssp_state->user = NULL;
+ ntlmssp_state->domain = NULL;
+ ntlmssp_state->workstation = NULL;
/* now the NTLMSSP encoded auth hashes */
- if (!msrpc_parse(&request, parse_string,
- "NTLMSSP",
- &ntlmssp_command,
+ if (!msrpc_parse(ntlmssp_state, &request, parse_string,
+ "NTLMSSP",
+ &ntlmssp_command,
&ntlmssp_state->lm_resp,
&ntlmssp_state->nt_resp,
- &ntlmssp_state->domain,
- &ntlmssp_state->user,
+ &ntlmssp_state->domain,
+ &ntlmssp_state->user,
&ntlmssp_state->workstation,
- &sess_key,
- &neg_flags)) {
- DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
- dump_data(2, request.data, request.length);
- return NT_STATUS_INVALID_PARAMETER;
+ &encrypted_session_key,
+ &auth_flags)) {
+ 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,
+ &ntlmssp_state->domain,
+ &ntlmssp_state->user,
+ &ntlmssp_state->workstation)) {
+ DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP (tried both formats):\n"));
+ dump_data(2, request.data, request.length);
+
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ }
+
+ if (auth_flags)
+ ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, lp_lanman_auth());
+
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_AUTHENTICATE_MESSAGE(&request,
+ ntlmssp_state,
+ NULL,
+ &authenticate)))
+ {
+ NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE, &authenticate);
+ }
}
- data_blob_free(&sess_key);
-
- DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%d len2=%d\n",
- ntlmssp_state->user, ntlmssp_state->domain, ntlmssp_state->workstation, ntlmssp_state->lm_resp.length, ntlmssp_state->nt_resp.length));
+ 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
- nt_status = ntlmssp_state->check_password(ntlmssp_state);
-
- *reply = data_blob(NULL, 0);
+ /* 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);
+
+ doing_ntlm2 = True;
+
+ memcpy(session_nonce, ntlmssp_state->internal_chal.data, 8);
+ memcpy(&session_nonce[8], ntlmssp_state->lm_resp.data, 8);
+
+ MD5Init(&md5_session_nonce_ctx);
+ MD5Update(&md5_session_nonce_ctx, 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 */
+ 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))) {
+ data_blob_free(&encrypted_session_key);
+ return nt_status;
+ }
+
+ /* LM Key is incompatible. */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ }
+ }
+
+ /*
+ * 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))) {
+ data_blob_free(&encrypted_session_key);
+ return nt_status;
+ }
+
+ dump_data_pw("NT session key:\n", user_session_key.data, user_session_key.length);
+ dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length);
+
+ /* Handle the different session key derivation for NTLM2 */
+ if (doing_ntlm2) {
+ if (user_session_key.data && user_session_key.length == 16) {
+ session_key = data_blob_talloc(ntlmssp_state,
+ NULL, 16);
+ hmac_md5(user_session_key.data, session_nonce,
+ sizeof(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;
+ }
+ } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
+ if (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);
+ if (session_key.data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ 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"));
+ } else {
+ uint8 zeros[24];
+ ZERO_STRUCT(zeros);
+ session_key = data_blob_talloc(
+ ntlmssp_state, NULL, 16);
+ if (session_key.data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ SMBsesskeygen_lm_sess_key(
+ lm_session_key.data, zeros,
+ session_key.data);
+ }
+ dump_data_pw("LM session key:\n", session_key.data,
+ session_key.length);
+ } else {
+ DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
+ session_key = data_blob_null;
+ }
+ } else if (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);
+ } else if (lm_session_key.data) {
+ 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);
+ } else {
+ DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
+ session_key = data_blob_null;
+ }
+
+ /* 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 (!encrypted_session_key.data || encrypted_session_key.length != 16) {
+ data_blob_free(&encrypted_session_key);
+ DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
+ (unsigned int)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",
+ (unsigned int)session_key.length));
+ ntlmssp_state->session_key = session_key;
+ } else {
+ dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
+ arcfour_crypt_blob(encrypted_session_key.data,
+ encrypted_session_key.length,
+ &session_key);
+ ntlmssp_state->session_key = data_blob_talloc(
+ ntlmssp_state, encrypted_session_key.data,
+ encrypted_session_key.length);
+ dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data,
+ encrypted_session_key.length);
+ }
+ } else {
+ ntlmssp_state->session_key = session_key;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ ntlmssp_state->session_key = data_blob_null;
+ } else if (ntlmssp_state->session_key.length) {
+ nt_status = ntlmssp_sign_init(ntlmssp_state);
+ }
+
+ data_blob_free(&encrypted_session_key);
+
+ /* Only one authentication allowed per server state. */
+ ntlmssp_state->expected_state = NTLMSSP_DONE;
return nt_status;
}
/**
* Create an NTLMSSP state machine
- *
+ *
* @param ntlmssp_state NTLMSSP State, allocated by this function
*/
NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state)
{
- TALLOC_CTX *mem_ctx;
-
- mem_ctx = talloc_init("NTLMSSP context");
-
- *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state));
+ *ntlmssp_state = TALLOC_ZERO_P(NULL, NTLMSSP_STATE);
if (!*ntlmssp_state) {
DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
- talloc_destroy(mem_ctx);
+ talloc_destroy(*ntlmssp_state);
return NT_STATUS_NO_MEMORY;
}
- (*ntlmssp_state)->mem_ctx = mem_ctx;
+ (*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)->get_global_myname = global_myname;
(*ntlmssp_state)->get_domain = lp_workgroup;
(*ntlmssp_state)->expected_state = NTLMSSP_NEGOTIATE;
- return NT_STATUS_OK;
-}
-
-/**
- * End an NTLMSSP state machine
- *
- * @param ntlmssp_state NTLMSSP State, free()ed by this function
- */
-
-NTSTATUS ntlmssp_server_end(NTLMSSP_STATE **ntlmssp_state)
-{
- TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx;
-
- data_blob_free(&(*ntlmssp_state)->chal);
- data_blob_free(&(*ntlmssp_state)->lm_resp);
- data_blob_free(&(*ntlmssp_state)->nt_resp);
+ (*ntlmssp_state)->ref_count = 1;
- SAFE_FREE((*ntlmssp_state)->user);
- SAFE_FREE((*ntlmssp_state)->domain);
- SAFE_FREE((*ntlmssp_state)->workstation);
+ (*ntlmssp_state)->neg_flags =
+ NTLMSSP_NEGOTIATE_128 |
+ NTLMSSP_NEGOTIATE_56 |
+ NTLMSSP_NEGOTIATE_VERSION |
+ NTLMSSP_NEGOTIATE_ALWAYS_SIGN |
+ NTLMSSP_NEGOTIATE_NTLM |
+ NTLMSSP_NEGOTIATE_NTLM2 |
+ NTLMSSP_NEGOTIATE_KEY_EXCH |
+ NTLMSSP_NEGOTIATE_SIGN |
+ NTLMSSP_NEGOTIATE_SEAL;
- talloc_destroy(mem_ctx);
- *ntlmssp_state = NULL;
return NT_STATUS_OK;
}
-/**
- * Next state function for the NTLMSSP state machine
- *
- * @param ntlmssp_state NTLMSSP State
- * @param request The request, as a DATA_BLOB
- * @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
- */
-
-NTSTATUS ntlmssp_server_update(NTLMSSP_STATE *ntlmssp_state,
- const DATA_BLOB request, DATA_BLOB *reply)
-{
- uint32 ntlmssp_command;
- *reply = data_blob(NULL, 0);
-
- if (request.length) {
- if (!msrpc_parse(&request, "Cd",
- "NTLMSSP",
- &ntlmssp_command)) {
- return NT_STATUS_INVALID_PARAMETER;
- }
- } else {
- /* 'datagram' mode - no neg packet */
- ntlmssp_command = NTLMSSP_NEGOTIATE;
- }
-
- 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;
- }
-
- if (ntlmssp_command == NTLMSSP_NEGOTIATE) {
- return ntlmssp_server_negotiate(ntlmssp_state, request, reply);
- } else if (ntlmssp_command == NTLMSSP_AUTH) {
- return ntlmssp_server_auth(ntlmssp_state, request, reply);
- } else {
- DEBUG(1, ("unknown NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
- return NT_STATUS_INVALID_PARAMETER;
- }
-}
-
/*********************************************************************
Client side NTLMSSP
*********************************************************************/
/**
* Next state function for the Initial packet
- *
+ *
* @param ntlmssp_state NTLMSSP State
* @param request The request, as a DATA_BLOB. reply.data must be NULL
* @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors or NT_STATUS_OK.
+ * @return Errors or NT_STATUS_OK.
*/
-static NTSTATUS ntlmssp_client_initial(struct ntlmssp_client_state *ntlmssp_state,
- DATA_BLOB reply, DATA_BLOB *next_request)
+static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
+ DATA_BLOB reply, DATA_BLOB *next_request)
{
+ struct NEGOTIATE_MESSAGE negotiate;
+
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(next_request, "CddAA",
+ msrpc_gen(ntlmssp_state, next_request, "CddAA",
"NTLMSSP",
NTLMSSP_NEGOTIATE,
ntlmssp_state->neg_flags,
- ntlmssp_state->get_domain(),
+ ntlmssp_state->get_domain(),
ntlmssp_state->get_global_myname());
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_NEGOTIATE_MESSAGE(next_request,
+ ntlmssp_state,
+ NULL,
+ &negotiate)))
+ {
+ NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE, &negotiate);
+ }
+ }
+
+ 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.
+ * @return Errors or NT_STATUS_OK.
*/
-static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_state,
- const DATA_BLOB reply, DATA_BLOB *next_request)
+static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
+ const DATA_BLOB reply, DATA_BLOB *next_request)
{
uint32 chal_flags, ntlmssp_command, unkn1, unkn2;
DATA_BLOB server_domain_blob;
DATA_BLOB challenge_blob;
- DATA_BLOB struct_blob = data_blob(NULL, 0);
+ DATA_BLOB struct_blob = data_blob_null;
char *server_domain;
const char *chal_parse_string;
const char *auth_gen_string;
- DATA_BLOB lm_response = data_blob(NULL, 0);
- DATA_BLOB nt_response = data_blob(NULL, 0);
- DATA_BLOB session_key = data_blob(NULL, 0);
- uint8 datagram_sess_key[16];
- size_t datagram_sess_key_len;
-
-#if 0 /* until we know what flag to tigger it on */
- generate_random_buffer(datagram_sess_key, sizeof(datagram_sess_key), False);
- datagram_sess_key_len = sizeof(datagram_sess_key);
-#else
- ZERO_STRUCT(datagram_sess_key);
- datagram_sess_key_len = 0;
-#endif
-
- if (!msrpc_parse(&reply, "CdBd",
+ DATA_BLOB lm_response = data_blob_null;
+ DATA_BLOB nt_response = data_blob_null;
+ DATA_BLOB session_key = data_blob_null;
+ DATA_BLOB encrypted_session_key = data_blob_null;
+ NTSTATUS nt_status = NT_STATUS_OK;
+ struct CHALLENGE_MESSAGE challenge;
+ struct AUTHENTICATE_MESSAGE authenticate;
+
+ if (!msrpc_parse(ntlmssp_state, &reply, "CdBd",
"NTLMSSP",
- &ntlmssp_command,
+ &ntlmssp_command,
&server_domain_blob,
&chal_flags)) {
DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
return NT_STATUS_INVALID_PARAMETER;
}
-
+
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_CHALLENGE_MESSAGE(&reply,
+ ntlmssp_state,
+ NULL,
+ &challenge)))
+ {
+ NDR_PRINT_DEBUG(CHALLENGE_MESSAGE, &challenge);
+ }
+ }
+
data_blob_free(&server_domain_blob);
DEBUG(3, ("Got challenge flags:\n"));
debug_ntlmssp_flags(chal_flags);
- if (chal_flags & NTLMSSP_NEGOTIATE_UNICODE) {
- if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
+ ntlmssp_handle_neg_flags(ntlmssp_state, chal_flags, lp_client_lanman_auth());
+
+ if (ntlmssp_state->unicode) {
+ if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
chal_parse_string = "CdUdbddB";
} else {
chal_parse_string = "CdUdbdd";
}
auth_gen_string = "CdBBUUUBd";
- ntlmssp_state->unicode = True;
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
- } else if (chal_flags & NTLMSSP_NEGOTIATE_OEM) {
- if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
+ } else {
+ if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
chal_parse_string = "CdAdbddB";
} else {
chal_parse_string = "CdAdbdd";
}
- auth_gen_string = "CdBBAAABd";
- ntlmssp_state->unicode = False;
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
- } else {
- return NT_STATUS_INVALID_PARAMETER;
- }
- if (chal_flags & NTLMSSP_NEGOTIATE_LM_KEY && lp_client_lanman_auth()) {
- /* server forcing us to use LM */
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
- ntlmssp_state->use_ntlmv2 = False;
- } else {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
- }
-
- if (!(chal_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
- }
-
- if (!(chal_flags & NTLMSSP_NEGOTIATE_128)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
+ auth_gen_string = "CdBBAAABd";
}
DEBUG(3, ("NTLMSSP: Set final flags:\n"));
debug_ntlmssp_flags(ntlmssp_state->neg_flags);
- if (!msrpc_parse(&reply, chal_parse_string,
+ if (!msrpc_parse(ntlmssp_state, &reply, chal_parse_string,
"NTLMSSP",
- &ntlmssp_command,
+ &ntlmssp_command,
&server_domain,
&chal_flags,
&challenge_blob, 8,
return NT_STATUS_INVALID_PARAMETER;
}
- SAFE_FREE(server_domain);
+ ntlmssp_state->server_domain = server_domain;
+
if (challenge_blob.length != 8) {
data_blob_free(&struct_blob);
return NT_STATUS_INVALID_PARAMETER;
}
- if (ntlmssp_state->use_ntlmv2) {
+ if (!ntlmssp_state->nt_hash || !ntlmssp_state->lm_hash) {
+ uchar zeros[16];
+ /* do nothing - blobs are zero length */
+ ZERO_STRUCT(zeros);
+
+ /* session key is all zeros */
+ session_key = data_blob_talloc(ntlmssp_state, zeros, 16);
+
+ /* not doing NLTM2 without a password */
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
+ } else if (ntlmssp_state->use_ntlmv2) {
if (!struct_blob.length) {
/* be lazy, match win2k - we can't do NTLMv2 without it */
+ DEBUG(1, ("Server did not provide 'target information', required for NTLMv2\n"));
return NT_STATUS_INVALID_PARAMETER;
}
/* TODO: if the remote server is standalone, then we should replace 'domain'
with the server name as supplied above */
-
- if (!SMBNTLMv2encrypt(ntlmssp_state->user,
- ntlmssp_state->domain,
- ntlmssp_state->password, &challenge_blob,
- &struct_blob,
- &lm_response, &nt_response, &session_key)) {
+
+ if (!SMBNTLMv2encrypt_hash(ntlmssp_state,
+ ntlmssp_state->user,
+ ntlmssp_state->domain,
+ ntlmssp_state->nt_hash, &challenge_blob,
+ &struct_blob,
+ &lm_response, &nt_response, NULL,
+ &session_key)) {
data_blob_free(&challenge_blob);
data_blob_free(&struct_blob);
return NT_STATUS_NO_MEMORY;
}
+ } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+ struct MD5Context md5_session_nonce_ctx;
+ uchar session_nonce[16];
+ uchar session_nonce_hash[16];
+ uchar user_session_key[16];
+
+ lm_response = data_blob_talloc(ntlmssp_state, NULL, 24);
+ generate_random_buffer(lm_response.data, 8);
+ memset(lm_response.data+8, 0, 16);
+
+ memcpy(session_nonce, challenge_blob.data, 8);
+ memcpy(&session_nonce[8], lm_response.data, 8);
+
+ MD5Init(&md5_session_nonce_ctx);
+ MD5Update(&md5_session_nonce_ctx, challenge_blob.data, 8);
+ MD5Update(&md5_session_nonce_ctx, lm_response.data, 8);
+ MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
+
+ DEBUG(5, ("NTLMSSP challenge set by NTLM2\n"));
+ DEBUG(5, ("challenge is: \n"));
+ dump_data(5, session_nonce_hash, 8);
+
+ nt_response = data_blob_talloc(ntlmssp_state, NULL, 24);
+ SMBNTencrypt_hash(ntlmssp_state->nt_hash,
+ session_nonce_hash,
+ nt_response.data);
+
+ session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+
+ SMBsesskeygen_ntv1(ntlmssp_state->nt_hash, user_session_key);
+ hmac_md5(user_session_key, session_nonce, sizeof(session_nonce), session_key.data);
+ dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
} else {
- uchar lm_hash[16];
- uchar nt_hash[16];
- E_deshash(ntlmssp_state->password, lm_hash);
- E_md4hash(ntlmssp_state->password, nt_hash);
-
/* lanman auth is insecure, it may be disabled */
if (lp_client_lanman_auth()) {
- lm_response = data_blob(NULL, 24);
- SMBencrypt(ntlmssp_state->password,challenge_blob.data,
+ lm_response = data_blob_talloc(ntlmssp_state,
+ NULL, 24);
+ SMBencrypt_hash(ntlmssp_state->lm_hash,challenge_blob.data,
lm_response.data);
}
-
- nt_response = data_blob(NULL, 24);
- SMBNTencrypt(ntlmssp_state->password,challenge_blob.data,
+
+ nt_response = data_blob_talloc(ntlmssp_state, NULL, 24);
+ SMBNTencrypt_hash(ntlmssp_state->nt_hash,challenge_blob.data,
nt_response.data);
- session_key = data_blob(NULL, 16);
- if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
- && lp_client_lanman_auth()) {
- SMBsesskeygen_lmv1(lm_hash, lm_response.data,
- session_key.data);
+ session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
+ if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
+ && lp_client_lanman_auth()) {
+ SMBsesskeygen_lm_sess_key(ntlmssp_state->lm_hash, lm_response.data,
+ session_key.data);
+ dump_data_pw("LM session key\n", session_key.data, session_key.length);
} else {
- SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
+ SMBsesskeygen_ntv1(ntlmssp_state->nt_hash, session_key.data);
+ dump_data_pw("NT session key:\n", session_key.data, session_key.length);
}
}
data_blob_free(&struct_blob);
+ /* Key exchange encryptes a new client-generated session key with
+ the password-derived key */
+ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
+ /* Make up a new session key */
+ uint8 client_session_key[16];
+ generate_random_buffer(client_session_key, sizeof(client_session_key));
+
+ /* Encrypt the new session key with the old one */
+ encrypted_session_key = data_blob(client_session_key, sizeof(client_session_key));
+ dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
+ arcfour_crypt_blob(encrypted_session_key.data, encrypted_session_key.length, &session_key);
+ dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
+
+ /* Mark the new session key as the 'real' session key */
+ data_blob_free(&session_key);
+ session_key = data_blob_talloc(ntlmssp_state,
+ client_session_key,
+ sizeof(client_session_key));
+ }
+
/* this generates the actual auth packet */
- if (!msrpc_gen(next_request, auth_gen_string,
- "NTLMSSP",
- NTLMSSP_AUTH,
+ if (!msrpc_gen(ntlmssp_state, next_request, auth_gen_string,
+ "NTLMSSP",
+ NTLMSSP_AUTH,
lm_response.data, lm_response.length,
nt_response.data, nt_response.length,
- ntlmssp_state->domain,
- ntlmssp_state->user,
- ntlmssp_state->get_global_myname(),
- datagram_sess_key, datagram_sess_key_len,
+ ntlmssp_state->domain,
+ ntlmssp_state->user,
+ ntlmssp_state->get_global_myname(),
+ encrypted_session_key.data, encrypted_session_key.length,
ntlmssp_state->neg_flags)) {
-
- data_blob_free(&lm_response);
- data_blob_free(&nt_response);
- data_blob_free(&session_key);
+
return NT_STATUS_NO_MEMORY;
}
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_AUTHENTICATE_MESSAGE(next_request,
+ ntlmssp_state,
+ NULL,
+ &authenticate)))
+ {
+ NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE, &authenticate);
+ }
+ }
+
+ data_blob_free(&encrypted_session_key);
+
data_blob_free(&ntlmssp_state->chal);
- data_blob_free(&ntlmssp_state->lm_resp);
- data_blob_free(&ntlmssp_state->nt_resp);
- data_blob_free(&ntlmssp_state->session_key);
+
+ ntlmssp_state->session_key = session_key;
ntlmssp_state->chal = challenge_blob;
ntlmssp_state->lm_resp = lm_response;
ntlmssp_state->nt_resp = nt_response;
- ntlmssp_state->session_key = session_key;
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ ntlmssp_state->expected_state = NTLMSSP_DONE;
+
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_sign_init(ntlmssp_state))) {
+ DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n", nt_errstr(nt_status)));
+ }
+
+ return nt_status;
}
-NTSTATUS ntlmssp_client_start(NTLMSSP_CLIENT_STATE **ntlmssp_state)
+NTSTATUS ntlmssp_client_start(NTLMSSP_STATE **ntlmssp_state)
{
- TALLOC_CTX *mem_ctx;
-
- mem_ctx = talloc_init("NTLMSSP Client context");
-
- *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state));
+ *ntlmssp_state = TALLOC_ZERO_P(NULL, NTLMSSP_STATE);
if (!*ntlmssp_state) {
- DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
- talloc_destroy(mem_ctx);
+ DEBUG(0,("ntlmssp_client_start: talloc failed!\n"));
+ talloc_destroy(*ntlmssp_state);
return NT_STATUS_NO_MEMORY;
}
- (*ntlmssp_state)->mem_ctx = mem_ctx;
+ (*ntlmssp_state)->role = NTLMSSP_CLIENT;
(*ntlmssp_state)->get_global_myname = global_myname;
(*ntlmssp_state)->get_domain = lp_workgroup;
(*ntlmssp_state)->use_ntlmv2 = lp_client_ntlmv2_auth();
- (*ntlmssp_state)->neg_flags =
- NTLMSSP_NEGOTIATE_128 |
- NTLMSSP_NEGOTIATE_NTLM |
- NTLMSSP_REQUEST_TARGET;
+ (*ntlmssp_state)->expected_state = NTLMSSP_INITIAL;
(*ntlmssp_state)->ref_count = 1;
- return NT_STATUS_OK;
-}
-
-NTSTATUS ntlmssp_client_end(NTLMSSP_CLIENT_STATE **ntlmssp_state)
-{
- TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx;
-
- (*ntlmssp_state)->ref_count--;
-
- if ((*ntlmssp_state)->ref_count == 0) {
- data_blob_free(&(*ntlmssp_state)->chal);
- data_blob_free(&(*ntlmssp_state)->lm_resp);
- data_blob_free(&(*ntlmssp_state)->nt_resp);
- data_blob_free(&(*ntlmssp_state)->session_key);
- data_blob_free(&(*ntlmssp_state)->stored_response);
- talloc_destroy(mem_ctx);
- }
-
- *ntlmssp_state = NULL;
- return NT_STATUS_OK;
-}
-
-NTSTATUS ntlmssp_client_update(NTLMSSP_CLIENT_STATE *ntlmssp_state,
- DATA_BLOB reply, DATA_BLOB *next_request)
-{
- NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
- uint32 ntlmssp_command;
- *next_request = data_blob(NULL, 0);
-
- if (!reply.length) {
- /* If there is a cached reply, use it - otherwise this is the first packet */
- if (!ntlmssp_state->stored_response.length) {
- return ntlmssp_client_initial(ntlmssp_state, reply, next_request);
- }
-
- reply = ntlmssp_state->stored_response;
- }
-
- if (!msrpc_parse(&reply, "Cd",
- "NTLMSSP",
- &ntlmssp_command)) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (ntlmssp_command == NTLMSSP_CHALLENGE) {
- nt_status = ntlmssp_client_challenge(ntlmssp_state, reply, next_request);
- }
- if (ntlmssp_state->stored_response.length) {
- data_blob_free(&ntlmssp_state->stored_response);
- }
- return nt_status;
-}
-
-NTSTATUS ntlmssp_set_username(NTLMSSP_CLIENT_STATE *ntlmssp_state, const char *user)
-{
- ntlmssp_state->user = talloc_strdup(ntlmssp_state->mem_ctx, user);
- if (!ntlmssp_state->user) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-NTSTATUS ntlmssp_set_password(NTLMSSP_CLIENT_STATE *ntlmssp_state, const char *password)
-{
- ntlmssp_state->password = talloc_strdup(ntlmssp_state->mem_ctx, password);
- if (!ntlmssp_state->password) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-NTSTATUS ntlmssp_set_domain(NTLMSSP_CLIENT_STATE *ntlmssp_state, const char *domain)
-{
- ntlmssp_state->domain = talloc_strdup(ntlmssp_state->mem_ctx, domain);
- if (!ntlmssp_state->domain) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Store a DATA_BLOB containing an NTLMSSP response, for use later.
- * This 'keeps' the data blob - the caller must *not* free it.
- */
+ (*ntlmssp_state)->neg_flags =
+ NTLMSSP_NEGOTIATE_128 |
+ NTLMSSP_NEGOTIATE_ALWAYS_SIGN |
+ NTLMSSP_NEGOTIATE_NTLM |
+ NTLMSSP_NEGOTIATE_NTLM2 |
+ NTLMSSP_NEGOTIATE_KEY_EXCH |
+ NTLMSSP_REQUEST_TARGET;
-NTSTATUS ntlmssp_client_store_response(NTLMSSP_CLIENT_STATE *ntlmssp_state,
- DATA_BLOB response)
-{
- data_blob_free(&ntlmssp_state->stored_response);
- ntlmssp_state->stored_response = response;
return NT_STATUS_OK;
}
git.samba.org / ira / wip.git / blobdiff