/* 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 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "auth/ntlmssp/ntlmssp.h" #include "auth/ntlmssp/msrpc_parse.h" #include "lib/crypto/crypto.h" #include "system/filesys.h" #include "libcli/auth/libcli_auth.h" #include "auth/credentials/credentials.h" #include "auth/gensec/gensec.h" #include "auth/auth.h" #include "param/param.h" /** * Set a username on an NTLMSSP context - ensures it is talloc()ed * */ static NTSTATUS ntlmssp_set_username(struct gensec_ntlmssp_state *gensec_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; } gensec_ntlmssp_state->user = talloc_strdup(gensec_ntlmssp_state, user); if (!gensec_ntlmssp_state->user) { return NT_STATUS_NO_MEMORY; } return NT_STATUS_OK; } /** * Set a domain on an NTLMSSP context - ensures it is talloc()ed * */ static NTSTATUS ntlmssp_set_domain(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *domain) { gensec_ntlmssp_state->domain = talloc_strdup(gensec_ntlmssp_state, domain); if (!gensec_ntlmssp_state->domain) { return NT_STATUS_NO_MEMORY; } return NT_STATUS_OK; } /** * Set a workstation on an NTLMSSP context - ensures it is talloc()ed * */ static NTSTATUS ntlmssp_set_workstation(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *workstation) { gensec_ntlmssp_state->workstation = talloc_strdup(gensec_ntlmssp_state, workstation); if (!gensec_ntlmssp_state->workstation) { return NT_STATUS_NO_MEMORY; } return NT_STATUS_OK; } /** * Determine correct target name flags for reply, given server role * and negotiated flags * * @param gensec_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 gensec_ntlmssp_state *gensec_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 (gensec_ntlmssp_state->server_role == ROLE_STANDALONE) { *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER; return gensec_ntlmssp_state->server_name; } else { *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN; return gensec_ntlmssp_state->domain; }; } else { return ""; } } /** * Next state function for the Negotiate packet * * @param gensec_security GENSEC state * @param out_mem_ctx Memory context for *out * @param in The request, as a DATA_BLOB. reply.data must be NULL * @param out The reply, as an allocated DATA_BLOB, caller to free. * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required. */ NTSTATUS ntlmssp_server_negotiate(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx, const DATA_BLOB in, DATA_BLOB *out) { struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data; DATA_BLOB struct_blob; char dnsname[MAXHOSTNAMELEN], dnsdomname[MAXHOSTNAMELEN]; const char *p; uint32_t neg_flags = 0; uint32_t ntlmssp_command, chal_flags; 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 ((in.length < 16) || !msrpc_parse(out_mem_ctx, lp_iconv_convenience(gensec_security->lp_ctx), &in, "Cdd", "NTLMSSP", &ntlmssp_command, &neg_flags)) { DEBUG(1, ("ntlmssp_server_negotiate: failed to parse " "NTLMSSP Negotiate of length %u:\n", (unsigned int)in.length )); dump_data(2, in.data, in.length); return NT_STATUS_INVALID_PARAMETER; } debug_ntlmssp_flags(neg_flags); } ntlmssp_handle_neg_flags(gensec_ntlmssp_state, neg_flags, gensec_ntlmssp_state->allow_lm_key); /* Ask our caller what challenge they would like in the packet */ cryptkey = gensec_ntlmssp_state->get_challenge(gensec_ntlmssp_state); /* Check if we may set the challenge */ if (!gensec_ntlmssp_state->may_set_challenge(gensec_ntlmssp_state)) { gensec_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 = gensec_ntlmssp_state->neg_flags; /* get the right name to fill in as 'target' */ target_name = ntlmssp_target_name(gensec_ntlmssp_state, neg_flags, &chal_flags); if (target_name == NULL) return NT_STATUS_INVALID_PARAMETER; gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8); gensec_ntlmssp_state->internal_chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8); dnsname[0] = '\0'; if (gethostname(dnsname, sizeof(dnsname)) == -1) { DEBUG(0,("gethostname failed\n")); return NT_STATUS_UNSUCCESSFUL; } /* This should be a 'netbios domain -> DNS domain' mapping */ p = strchr(dnsname, '.'); if (p != NULL) { safe_strcpy(dnsdomname, p+1, sizeof(dnsdomname)); strlower_m(dnsdomname); } else { dnsdomname[0] = '\0'; } /* 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, lp_iconv_convenience(gensec_security->lp_ctx), &struct_blob, "aaaaa", NTLMSSP_NAME_TYPE_DOMAIN, target_name, NTLMSSP_NAME_TYPE_SERVER, gensec_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 (gensec_ntlmssp_state->unicode) { gen_string = "CdUdbddB"; } else { gen_string = "CdAdbddB"; } msrpc_gen(out_mem_ctx, lp_iconv_convenience(gensec_security->lp_ctx), out, gen_string, "NTLMSSP", NTLMSSP_CHALLENGE, target_name, chal_flags, cryptkey, 8, 0, 0, struct_blob.data, struct_blob.length); } gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH; return NT_STATUS_MORE_PROCESSING_REQUIRED; } /** * Next state function for the Authenticate packet * * @param gensec_ntlmssp_state NTLMSSP State * @param request The request, as a DATA_BLOB * @return Errors or NT_STATUS_OK. */ static NTSTATUS ntlmssp_server_preauth(struct gensec_ntlmssp_state *gensec_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 (gensec_ntlmssp_state->unicode) { parse_string = "CdBBUUUBd"; } else { parse_string = "CdBBAAABd"; } /* zero these out */ data_blob_free(&gensec_ntlmssp_state->lm_resp); data_blob_free(&gensec_ntlmssp_state->nt_resp); data_blob_free(&gensec_ntlmssp_state->encrypted_session_key); gensec_ntlmssp_state->user = NULL; gensec_ntlmssp_state->domain = NULL; gensec_ntlmssp_state->workstation = NULL; /* now the NTLMSSP encoded auth hashes */ if (!msrpc_parse(gensec_ntlmssp_state, lp_iconv_convenience(gensec_ntlmssp_state->gensec_security->lp_ctx), &request, parse_string, "NTLMSSP", &ntlmssp_command, &gensec_ntlmssp_state->lm_resp, &gensec_ntlmssp_state->nt_resp, &domain, &user, &workstation, &gensec_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(&gensec_ntlmssp_state->encrypted_session_key); auth_flags = 0; /* Try again with a shorter string (Win9X truncates this packet) */ if (gensec_ntlmssp_state->unicode) { parse_string = "CdBBUUU"; } else { parse_string = "CdBBAAA"; } /* now the NTLMSSP encoded auth hashes */ if (!msrpc_parse(gensec_ntlmssp_state, lp_iconv_convenience(gensec_ntlmssp_state->gensec_security->lp_ctx), &request, parse_string, "NTLMSSP", &ntlmssp_command, &gensec_ntlmssp_state->lm_resp, &gensec_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(gensec_ntlmssp_state, auth_flags, gensec_ntlmssp_state->allow_lm_key); if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(gensec_ntlmssp_state, domain))) { /* zero this out */ data_blob_free(&gensec_ntlmssp_state->encrypted_session_key); return nt_status; } if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(gensec_ntlmssp_state, user))) { /* zero this out */ data_blob_free(&gensec_ntlmssp_state->encrypted_session_key); return nt_status; } if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(gensec_ntlmssp_state, workstation))) { /* zero this out */ data_blob_free(&gensec_ntlmssp_state->encrypted_session_key); return nt_status; } DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n", gensec_ntlmssp_state->user, gensec_ntlmssp_state->domain, gensec_ntlmssp_state->workstation, (unsigned long)gensec_ntlmssp_state->lm_resp.length, (unsigned long)gensec_ntlmssp_state->nt_resp.length)); #if 0 file_save("nthash1.dat", &gensec_ntlmssp_state->nt_resp.data, &gensec_ntlmssp_state->nt_resp.length); file_save("lmhash1.dat", &gensec_ntlmssp_state->lm_resp.data, &gensec_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 (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) { if (gensec_ntlmssp_state->nt_resp.length == 24 && gensec_ntlmssp_state->lm_resp.length == 24) { struct MD5Context md5_session_nonce_ctx; SMB_ASSERT(gensec_ntlmssp_state->internal_chal.data && gensec_ntlmssp_state->internal_chal.length == 8); gensec_ntlmssp_state->doing_ntlm2 = true; memcpy(gensec_ntlmssp_state->crypt.ntlm2.session_nonce, gensec_ntlmssp_state->internal_chal.data, 8); memcpy(&gensec_ntlmssp_state->crypt.ntlm2.session_nonce[8], gensec_ntlmssp_state->lm_resp.data, 8); MD5Init(&md5_session_nonce_ctx); MD5Update(&md5_session_nonce_ctx, gensec_ntlmssp_state->crypt.ntlm2.session_nonce, 16); MD5Final(session_nonce_hash, &md5_session_nonce_ctx); gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state, session_nonce_hash, 8); /* LM response is no longer useful, zero it out */ data_blob_free(&gensec_ntlmssp_state->lm_resp); /* We changed the effective challenge - set it */ if (!NT_STATUS_IS_OK(nt_status = gensec_ntlmssp_state->set_challenge(gensec_ntlmssp_state, &gensec_ntlmssp_state->chal))) { /* zero this out */ data_blob_free(&gensec_ntlmssp_state->encrypted_session_key); return nt_status; } /* LM Key is incompatible... */ gensec_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 gensec_ntlmssp_state NTLMSSP State * @return Errors or NT_STATUS_OK. */ static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key) { struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data; 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 (gensec_ntlmssp_state->doing_ntlm2) { if (user_session_key && user_session_key->data && user_session_key->length == 16) { session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16); hmac_md5(user_session_key->data, gensec_ntlmssp_state->crypt.ntlm2.session_nonce, sizeof(gensec_ntlmssp_state->crypt.ntlm2.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 ((gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) /* Ensure we can never get here on NTLMv2 */ && (gensec_ntlmssp_state->nt_resp.length == 0 || gensec_ntlmssp_state->nt_resp.length == 24)) { if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) { if (gensec_ntlmssp_state->lm_resp.data && gensec_ntlmssp_state->lm_resp.length == 24) { session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16); SMBsesskeygen_lm_sess_key(lm_session_key->data, gensec_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(gensec_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 */ gensec_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 */ gensec_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 */ gensec_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 */ gensec_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 (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) { if (!gensec_ntlmssp_state->encrypted_session_key.data || gensec_ntlmssp_state->encrypted_session_key.length != 16) { data_blob_free(&gensec_ntlmssp_state->encrypted_session_key); DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n", (unsigned)gensec_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", (unsigned)session_key.length)); gensec_ntlmssp_state->session_key = session_key; } else { dump_data_pw("KEY_EXCH session key (enc):\n", gensec_ntlmssp_state->encrypted_session_key.data, gensec_ntlmssp_state->encrypted_session_key.length); arcfour_crypt(gensec_ntlmssp_state->encrypted_session_key.data, session_key.data, gensec_ntlmssp_state->encrypted_session_key.length); gensec_ntlmssp_state->session_key = data_blob_talloc(gensec_ntlmssp_state, gensec_ntlmssp_state->encrypted_session_key.data, gensec_ntlmssp_state->encrypted_session_key.length); dump_data_pw("KEY_EXCH session key:\n", gensec_ntlmssp_state->encrypted_session_key.data, gensec_ntlmssp_state->encrypted_session_key.length); } } else { gensec_ntlmssp_state->session_key = session_key; } /* keep the session key around on the new context */ talloc_steal(gensec_ntlmssp_state, session_key.data); if ((gensec_security->want_features & GENSEC_FEATURE_SIGN) || (gensec_security->want_features & GENSEC_FEATURE_SEAL)) { nt_status = ntlmssp_sign_init(gensec_ntlmssp_state); } else { nt_status = NT_STATUS_OK; } data_blob_free(&gensec_ntlmssp_state->encrypted_session_key); /* allow arbitarily many authentications, but watch that this will cause a memory leak, until the gensec_ntlmssp_state is shutdown */ if (gensec_ntlmssp_state->server_multiple_authentications) { gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH; } else { gensec_ntlmssp_state->expected_state = NTLMSSP_DONE; } return nt_status; } /** * Next state function for the Authenticate packet * * @param gensec_security GENSEC state * @param out_mem_ctx Memory context for *out * @param in The request, as a DATA_BLOB. reply.data must be NULL * @param out The reply, as an allocated DATA_BLOB, caller to free. * @return Errors or NT_STATUS_OK if authentication sucessful */ NTSTATUS ntlmssp_server_auth(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx, const DATA_BLOB in, DATA_BLOB *out) { struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data; DATA_BLOB user_session_key = data_blob(NULL, 0); DATA_BLOB lm_session_key = data_blob(NULL, 0); NTSTATUS nt_status; TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx); if (!mem_ctx) { return NT_STATUS_NO_MEMORY; } /* zero the outbound NTLMSSP packet */ *out = data_blob_talloc(out_mem_ctx, NULL, 0); if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(gensec_ntlmssp_state, in))) { talloc_free(mem_ctx); 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 = gensec_ntlmssp_state->check_password(gensec_ntlmssp_state, mem_ctx, &user_session_key, &lm_session_key))) { talloc_free(mem_ctx); return nt_status; } if (gensec_security->want_features & (GENSEC_FEATURE_SIGN|GENSEC_FEATURE_SEAL|GENSEC_FEATURE_SESSION_KEY)) { nt_status = ntlmssp_server_postauth(gensec_security, &user_session_key, &lm_session_key); talloc_free(mem_ctx); return nt_status; } else { gensec_ntlmssp_state->session_key = data_blob(NULL, 0); talloc_free(mem_ctx); 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 gensec_ntlmssp_state *gensec_ntlmssp_state) { 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 gensec_ntlmssp_state *gensec_ntlmssp_state) { 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 gensec_ntlmssp_state *gensec_ntlmssp_state, DATA_BLOB *challenge) { NTSTATUS nt_status; 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 gensec_ntlmssp_state *gensec_ntlmssp_state, TALLOC_CTX *mem_ctx, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key) { NTSTATUS nt_status; struct auth_usersupplied_info *user_info = talloc(mem_ctx, struct auth_usersupplied_info); if (!user_info) { return NT_STATUS_NO_MEMORY; } user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT; user_info->flags = 0; user_info->mapped_state = false; user_info->client.account_name = gensec_ntlmssp_state->user; user_info->client.domain_name = gensec_ntlmssp_state->domain; user_info->workstation_name = gensec_ntlmssp_state->workstation; user_info->remote_host = gensec_get_peer_addr(gensec_ntlmssp_state->gensec_security); user_info->password_state = AUTH_PASSWORD_RESPONSE; user_info->password.response.lanman = gensec_ntlmssp_state->lm_resp; user_info->password.response.lanman.data = talloc_steal(user_info, gensec_ntlmssp_state->lm_resp.data); user_info->password.response.nt = gensec_ntlmssp_state->nt_resp; user_info->password.response.nt.data = talloc_steal(user_info, gensec_ntlmssp_state->nt_resp.data); nt_status = auth_check_password(gensec_ntlmssp_state->auth_context, mem_ctx, user_info, &gensec_ntlmssp_state->server_info); talloc_free(user_info); NT_STATUS_NOT_OK_RETURN(nt_status); talloc_steal(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info); if (gensec_ntlmssp_state->server_info->user_session_key.length) { DEBUG(10, ("Got NT session key of length %u\n", (unsigned)gensec_ntlmssp_state->server_info->user_session_key.length)); if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->user_session_key.data)) { return NT_STATUS_NO_MEMORY; } *user_session_key = gensec_ntlmssp_state->server_info->user_session_key; } if (gensec_ntlmssp_state->server_info->lm_session_key.length) { DEBUG(10, ("Got LM session key of length %u\n", (unsigned)gensec_ntlmssp_state->server_info->lm_session_key.length)); if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->lm_session_key.data)) { return NT_STATUS_NO_MEMORY; } *lm_session_key = gensec_ntlmssp_state->server_info->lm_session_key; } return nt_status; } /** * 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 = (struct gensec_ntlmssp_state *)gensec_security->private_data; nt_status = auth_generate_session_info(gensec_ntlmssp_state, gensec_security->lp_ctx, 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->session_key.data, gensec_ntlmssp_state->session_key.length); return NT_STATUS_OK; } /** * Start NTLMSSP on the server side * */ NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security) { NTSTATUS nt_status; struct gensec_ntlmssp_state *gensec_ntlmssp_state; nt_status = gensec_ntlmssp_start(gensec_security); NT_STATUS_NOT_OK_RETURN(nt_status); gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data; gensec_ntlmssp_state->role = NTLMSSP_SERVER; gensec_ntlmssp_state->workstation = NULL; gensec_ntlmssp_state->server_name = lp_netbios_name(gensec_security->lp_ctx); gensec_ntlmssp_state->domain = lp_workgroup(gensec_security->lp_ctx); gensec_ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE; gensec_ntlmssp_state->allow_lm_key = (lp_lanman_auth(gensec_security->lp_ctx) && lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "allow_lm_key", false)); gensec_ntlmssp_state->server_multiple_authentications = false; gensec_ntlmssp_state->neg_flags = NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_UNKNOWN_02000000; gensec_ntlmssp_state->lm_resp = data_blob(NULL, 0); gensec_ntlmssp_state->nt_resp = data_blob(NULL, 0); gensec_ntlmssp_state->encrypted_session_key = data_blob(NULL, 0); if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "128bit", true)) { gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128; } if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "56bit", true)) { gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56; } if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "keyexchange", true)) { gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH; } if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "alwayssign", true)) { gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; } if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "ntlm2", true)) { gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2; } if (gensec_security->want_features & GENSEC_FEATURE_SIGN) { gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN; } if (gensec_security->want_features & GENSEC_FEATURE_SEAL) { gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL; } nt_status = auth_context_create(gensec_ntlmssp_state, gensec_security->event_ctx, gensec_security->msg_ctx, gensec_security->lp_ctx, &gensec_ntlmssp_state->auth_context); NT_STATUS_NOT_OK_RETURN(nt_status); gensec_ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge; gensec_ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge; gensec_ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge; gensec_ntlmssp_state->check_password = auth_ntlmssp_check_password; gensec_ntlmssp_state->server_role = lp_server_role(gensec_security->lp_ctx); return NT_STATUS_OK; }