diff options
| -rw-r--r-- | source4/auth/auth.h | 1 | ||||
| -rw-r--r-- | source4/auth/gensec/gensec.mk | 15 | ||||
| -rw-r--r-- | source4/auth/gensec/ntlmssp.c | 1605 | ||||
| -rw-r--r-- | source4/auth/ntlmssp/ntlmssp.c | 442 | ||||
| -rw-r--r-- | source4/auth/ntlmssp/ntlmssp.h (renamed from source4/auth/gensec/ntlmssp.h) | 0 | ||||
| -rw-r--r-- | source4/auth/ntlmssp/ntlmssp.mk | 14 | ||||
| -rw-r--r-- | source4/auth/ntlmssp/ntlmssp_client.c | 445 | ||||
| -rw-r--r-- | source4/auth/ntlmssp/ntlmssp_parse.c (renamed from source4/auth/gensec/ntlmssp_parse.c) | 0 | ||||
| -rw-r--r-- | source4/auth/ntlmssp/ntlmssp_server.c | 765 | ||||
| -rw-r--r-- | source4/auth/ntlmssp/ntlmssp_sign.c (renamed from source4/auth/gensec/ntlmssp_sign.c) | 1 | ||||
| -rw-r--r-- | source4/build/smb_build/main.pm | 1 | ||||
| -rw-r--r-- | source4/torture/auth/ntlmssp.c | 1 |
12 files changed, 1670 insertions, 1620 deletions
diff --git a/source4/auth/auth.h b/source4/auth/auth.h index a9f6b8eac5..f64017832d 100644 --- a/source4/auth/auth.h +++ b/source4/auth/auth.h @@ -22,7 +22,6 @@ #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" diff --git a/source4/auth/gensec/gensec.mk b/source4/auth/gensec/gensec.mk index 7b5fa7ae36..02823fc11f 100644 --- a/source4/auth/gensec/gensec.mk +++ b/source4/auth/gensec/gensec.mk @@ -50,19 +50,6 @@ ADD_OBJ_FILES = \ ################################################ ################################################ -# 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] SUBSYSTEM = GENSEC @@ -71,7 +58,7 @@ INIT_OBJ_FILES = auth/gensec/schannel.o ADD_OBJ_FILES = \ auth/gensec/schannel_sign.o REQUIRED_SUBSYSTEMS = AUTH SCHANNELDB -# End MODULE gensec_ntlmssp +# End MODULE gensec_schannel ################################################ ################################################ diff --git a/source4/auth/gensec/ntlmssp.c b/source4/auth/gensec/ntlmssp.c deleted file mode 100644 index 5b40a412bd..0000000000 --- a/source4/auth/gensec/ntlmssp.c +++ /dev/null @@ -1,1605 +0,0 @@ -/* - 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; -} diff --git a/source4/auth/ntlmssp/ntlmssp.c b/source4/auth/ntlmssp/ntlmssp.c new file mode 100644 index 0000000000..d0bd98419e --- /dev/null +++ b/source4/auth/ntlmssp/ntlmssp.c @@ -0,0 +1,442 @@ +/* + 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; +} diff --git a/source4/auth/gensec/ntlmssp.h b/source4/auth/ntlmssp/ntlmssp.h index 0fe04a7c0f..0fe04a7c0f 100644 --- a/source4/auth/gensec/ntlmssp.h +++ b/source4/auth/ntlmssp/ntlmssp.h diff --git a/source4/auth/ntlmssp/ntlmssp.mk b/source4/auth/ntlmssp/ntlmssp.mk new file mode 100644 index 0000000000..551c211d71 --- /dev/null +++ b/source4/auth/ntlmssp/ntlmssp.mk @@ -0,0 +1,14 @@ +################################################ +# 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 +################################################ diff --git a/source4/auth/ntlmssp/ntlmssp_client.c b/source4/auth/ntlmssp/ntlmssp_client.c new file mode 100644 index 0000000000..bbde1d954b --- /dev/null +++ b/source4/auth/ntlmssp/ntlmssp_client.c @@ -0,0 +1,445 @@ +/* + 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; +} + diff --git a/source4/auth/gensec/ntlmssp_parse.c b/source4/auth/ntlmssp/ntlmssp_parse.c index 42546cb130..42546cb130 100644 --- a/source4/auth/gensec/ntlmssp_parse.c +++ b/source4/auth/ntlmssp/ntlmssp_parse.c diff --git a/source4/auth/ntlmssp/ntlmssp_server.c b/source4/auth/ntlmssp/ntlmssp_server.c new file mode 100644 index 0000000000..d1e97aeb1f --- /dev/null +++ b/source4/auth/ntlmssp/ntlmssp_server.c @@ -0,0 +1,765 @@ +/* + 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; +} diff --git a/source4/auth/gensec/ntlmssp_sign.c b/source4/auth/ntlmssp/ntlmssp_sign.c index dba3dbee29..222cb3e607 100644 --- a/source4/auth/gensec/ntlmssp_sign.c +++ b/source4/auth/ntlmssp/ntlmssp_sign.c @@ -22,6 +22,7 @@ #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" diff --git a/source4/build/smb_build/main.pm b/source4/build/smb_build/main.pm index e42e15b1f8..3598d49f29 100644 --- a/source4/build/smb_build/main.pm +++ b/source4/build/smb_build/main.pm @@ -47,6 +47,7 @@ sub smb_build_main($) "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", diff --git a/source4/torture/auth/ntlmssp.c b/source4/torture/auth/ntlmssp.c index 6fb07914dd..a29f99757c 100644 --- a/source4/torture/auth/ntlmssp.c +++ b/source4/torture/auth/ntlmssp.c @@ -20,6 +20,7 @@ #include "includes.h" #include "auth/auth.h" +#include "auth/ntlmssp/ntlmssp.h" #include "lib/cmdline/popt_common.h" BOOL torture_ntlmssp_self_check(void) |