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-rw-r--r--source4/auth/ntlm/auth_util.c260
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diff --git a/source4/auth/ntlm/auth_util.c b/source4/auth/ntlm/auth_util.c
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+++ b/source4/auth/ntlm/auth_util.c
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+/*
+ Unix SMB/CIFS implementation.
+ Authentication utility functions
+ Copyright (C) Andrew Tridgell 1992-1998
+ Copyright (C) Andrew Bartlett 2001
+ Copyright (C) Jeremy Allison 2000-2001
+ Copyright (C) Rafal Szczesniak 2002
+ 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/auth.h"
+#include "libcli/security/security.h"
+#include "libcli/auth/libcli_auth.h"
+#include "dsdb/samdb/samdb.h"
+#include "auth/credentials/credentials.h"
+#include "param/param.h"
+
+/* this default function can be used by mostly all backends
+ * which don't want to set a challenge
+ */
+NTSTATUS auth_get_challenge_not_implemented(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, DATA_BLOB *challenge)
+{
+ /* we don't want to set a challenge */
+ return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+/****************************************************************************
+ Create an auth_usersupplied_data structure after appropriate mapping.
+****************************************************************************/
+
+NTSTATUS map_user_info(TALLOC_CTX *mem_ctx,
+ const char *default_domain,
+ const struct auth_usersupplied_info *user_info,
+ struct auth_usersupplied_info **user_info_mapped)
+{
+ const char *domain;
+ char *account_name;
+ char *d;
+ DEBUG(5,("map_user_info: Mapping user [%s]\\[%s] from workstation [%s]\n",
+ user_info->client.domain_name, user_info->client.account_name, user_info->workstation_name));
+
+ account_name = talloc_strdup(mem_ctx, user_info->client.account_name);
+ if (!account_name) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* don't allow "" as a domain, fixes a Win9X bug
+ where it doesn't supply a domain for logon script
+ 'net use' commands. */
+
+ /* Split user@realm names into user and realm components. This is TODO to fix with proper userprincipalname support */
+ if (user_info->client.domain_name && *user_info->client.domain_name) {
+ domain = user_info->client.domain_name;
+ } else if (strchr_m(user_info->client.account_name, '@')) {
+ d = strchr_m(account_name, '@');
+ if (!d) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ d[0] = '\0';
+ d++;
+ domain = d;
+ } else {
+ domain = default_domain;
+ }
+
+ *user_info_mapped = talloc(mem_ctx, struct auth_usersupplied_info);
+ if (!*user_info_mapped) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (!talloc_reference(*user_info_mapped, user_info)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ **user_info_mapped = *user_info;
+ (*user_info_mapped)->mapped_state = true;
+ (*user_info_mapped)->mapped.domain_name = talloc_strdup(*user_info_mapped, domain);
+ (*user_info_mapped)->mapped.account_name = talloc_strdup(*user_info_mapped, account_name);
+ talloc_free(account_name);
+ if (!(*user_info_mapped)->mapped.domain_name
+ || !(*user_info_mapped)->mapped.account_name) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ return NT_STATUS_OK;
+}
+
+/****************************************************************************
+ Create an auth_usersupplied_data structure after appropriate mapping.
+****************************************************************************/
+
+NTSTATUS encrypt_user_info(TALLOC_CTX *mem_ctx, struct auth_context *auth_context,
+ enum auth_password_state to_state,
+ const struct auth_usersupplied_info *user_info_in,
+ const struct auth_usersupplied_info **user_info_encrypted)
+{
+ NTSTATUS nt_status;
+ struct auth_usersupplied_info *user_info_temp;
+ switch (to_state) {
+ case AUTH_PASSWORD_RESPONSE:
+ switch (user_info_in->password_state) {
+ case AUTH_PASSWORD_PLAIN:
+ {
+ const struct auth_usersupplied_info *user_info_temp2;
+ nt_status = encrypt_user_info(mem_ctx, auth_context,
+ AUTH_PASSWORD_HASH,
+ user_info_in, &user_info_temp2);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+ user_info_in = user_info_temp2;
+ /* fall through */
+ }
+ case AUTH_PASSWORD_HASH:
+ {
+ const uint8_t *challenge;
+ DATA_BLOB chall_blob;
+ user_info_temp = talloc(mem_ctx, struct auth_usersupplied_info);
+ if (!user_info_temp) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (!talloc_reference(user_info_temp, user_info_in)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ *user_info_temp = *user_info_in;
+ user_info_temp->mapped_state = to_state;
+
+ nt_status = auth_get_challenge(auth_context, &challenge);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+
+ chall_blob = data_blob_talloc(mem_ctx, challenge, 8);
+ if (lp_client_ntlmv2_auth(auth_context->lp_ctx)) {
+ DATA_BLOB names_blob = NTLMv2_generate_names_blob(mem_ctx, lp_iconv_convenience(auth_context->lp_ctx), lp_netbios_name(auth_context->lp_ctx), lp_workgroup(auth_context->lp_ctx));
+ DATA_BLOB lmv2_response, ntlmv2_response, lmv2_session_key, ntlmv2_session_key;
+
+ if (!SMBNTLMv2encrypt_hash(user_info_temp,
+ user_info_in->client.account_name,
+ user_info_in->client.domain_name,
+ user_info_in->password.hash.nt->hash, &chall_blob,
+ &names_blob,
+ &lmv2_response, &ntlmv2_response,
+ &lmv2_session_key, &ntlmv2_session_key)) {
+ data_blob_free(&names_blob);
+ return NT_STATUS_NO_MEMORY;
+ }
+ data_blob_free(&names_blob);
+ user_info_temp->password.response.lanman = lmv2_response;
+ user_info_temp->password.response.nt = ntlmv2_response;
+
+ data_blob_free(&lmv2_session_key);
+ data_blob_free(&ntlmv2_session_key);
+ } else {
+ DATA_BLOB blob = data_blob_talloc(mem_ctx, NULL, 24);
+ SMBOWFencrypt(user_info_in->password.hash.nt->hash, challenge, blob.data);
+
+ user_info_temp->password.response.nt = blob;
+ if (lp_client_lanman_auth(auth_context->lp_ctx) && user_info_in->password.hash.lanman) {
+ DATA_BLOB lm_blob = data_blob_talloc(mem_ctx, NULL, 24);
+ SMBOWFencrypt(user_info_in->password.hash.lanman->hash, challenge, blob.data);
+ user_info_temp->password.response.lanman = lm_blob;
+ } else {
+ /* if not sending the LM password, send the NT password twice */
+ user_info_temp->password.response.lanman = user_info_temp->password.response.nt;
+ }
+ }
+
+ user_info_in = user_info_temp;
+ /* fall through */
+ }
+ case AUTH_PASSWORD_RESPONSE:
+ *user_info_encrypted = user_info_in;
+ }
+ break;
+ case AUTH_PASSWORD_HASH:
+ {
+ switch (user_info_in->password_state) {
+ case AUTH_PASSWORD_PLAIN:
+ {
+ struct samr_Password lanman;
+ struct samr_Password nt;
+
+ user_info_temp = talloc(mem_ctx, struct auth_usersupplied_info);
+ if (!user_info_temp) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (!talloc_reference(user_info_temp, user_info_in)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ *user_info_temp = *user_info_in;
+ user_info_temp->mapped_state = to_state;
+
+ if (E_deshash(user_info_in->password.plaintext, lanman.hash)) {
+ user_info_temp->password.hash.lanman = talloc(user_info_temp,
+ struct samr_Password);
+ *user_info_temp->password.hash.lanman = lanman;
+ } else {
+ user_info_temp->password.hash.lanman = NULL;
+ }
+
+ E_md4hash(user_info_in->password.plaintext, nt.hash);
+ user_info_temp->password.hash.nt = talloc(user_info_temp,
+ struct samr_Password);
+ *user_info_temp->password.hash.nt = nt;
+
+ user_info_in = user_info_temp;
+ /* fall through */
+ }
+ case AUTH_PASSWORD_HASH:
+ *user_info_encrypted = user_info_in;
+ break;
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ break;
+ }
+ break;
+ }
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+/**
+ * Squash an NT_STATUS in line with security requirements.
+ * In an attempt to avoid giving the whole game away when users
+ * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
+ * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
+ * (session setups in particular).
+ *
+ * @param nt_status NTSTATUS input for squashing.
+ * @return the 'squashed' nt_status
+ **/
+_PUBLIC_ NTSTATUS auth_nt_status_squash(NTSTATUS nt_status)
+{
+ if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
+ /* Match WinXP and don't give the game away */
+ return NT_STATUS_LOGON_FAILURE;
+ } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
+ /* Match WinXP and don't give the game away */
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ return nt_status;
+}
generated by cgit (git 2.34.1) at 2024-07-20 05:41:29 +0000