From 7cabdeb7ec84c7c0b3e9b907e19f4e240b7fc4ca Mon Sep 17 00:00:00 2001 From: Andrew Bartlett Date: Tue, 29 Mar 2005 08:24:03 +0000 Subject: r6113: Move GENSEC and the kerberos code out of libcli/auth, and into auth/gensec and auth/kerberos. This also pulls the kerberos configure code out of libads (which is otherwise dead), and into auth/kerberos/kerberos.m4 Andrew Bartlett (This used to be commit e074d63f3dcf4f84239a10879112ebaf1cfa6c4f) --- source4/auth/gensec/ntlmssp.c | 1322 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1322 insertions(+) create mode 100644 source4/auth/gensec/ntlmssp.c (limited to 'source4/auth/gensec/ntlmssp.c') diff --git a/source4/auth/gensec/ntlmssp.c b/source4/auth/gensec/ntlmssp.c new file mode 100644 index 0000000000..37374d9d39 --- /dev/null +++ b/source4/auth/gensec/ntlmssp.c @@ -0,0 +1,1322 @@ +/* + Unix SMB/Netbios implementation. + Version 3.0 + handle NLTMSSP, client server side parsing + + Copyright (C) Andrew Tridgell 2001 + Copyright (C) Andrew Bartlett 2001-2005 + + 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}, + {NTLMSSP_CLIENT, NTLMSSP_UNKNOWN, NULL}, + {NTLMSSP_SERVER, NTLMSSP_UNKNOWN, NULL} +}; + + +/** + * Print out the NTLMSSP flags for debugging + * @param neg_flags The flags from the packet + */ + +void debug_ntlmssp_flags(uint32_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 NTLMSSP state machine + * + * @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 Error, MORE_PROCESSING_REQUIRED if a reply is sent, + * or NT_STATUS_OK if the user is authenticated. + */ + +NTSTATUS ntlmssp_update(struct ntlmssp_state *ntlmssp_state, + TALLOC_CTX *out_mem_ctx, + const DATA_BLOB in, DATA_BLOB *out) +{ + 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; ntlmssp_callbacks[i].fn; i++) { + if (ntlmssp_callbacks[i].role == ntlmssp_state->role + && ntlmssp_callbacks[i].ntlmssp_command == ntlmssp_command + && ntlmssp_callbacks[i].fn) { + return ntlmssp_callbacks[i].fn(ntlmssp_state, out_mem_ctx, input, out); + } + } + + DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n", + ntlmssp_state->role, ntlmssp_command)); + + return NT_STATUS_INVALID_PARAMETER; +} + +/** + * Return the NTLMSSP master session key + * + * @param ntlmssp_state NTLMSSP State + */ + +NTSTATUS ntlmssp_session_key(struct ntlmssp_state *ntlmssp_state, + DATA_BLOB *session_key) +{ + if (!ntlmssp_state->session_key.data) { + return NT_STATUS_NO_USER_SESSION_KEY; + } + *session_key = ntlmssp_state->session_key; + + return NT_STATUS_OK; +} + +/** + * End an NTLMSSP state machine + * + * @param ntlmssp_state NTLMSSP State, free()ed by this function + */ + +void ntlmssp_end(struct ntlmssp_state **ntlmssp_state) +{ + (*ntlmssp_state)->ref_count--; + + if ((*ntlmssp_state)->ref_count == 0) { + talloc_free(*ntlmssp_state); + } + + *ntlmssp_state = NULL; + return; +} + +/** + * Determine correct target name flags for reply, given server role + * and negotiated flags + * + * @param ntlmssp_state NTLMSSP State + * @param neg_flags The flags from the packet + * @param chal_flags The flags to be set in the reply packet + * @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; +} + +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; +} + -- cgit