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authorAndrew Tridgell <tridge@samba.org>2011-09-29 17:44:28 +1000
committerAndrew Tridgell <tridge@samba.org>2011-10-04 15:08:57 +1100
commit71f3a25ff7ff5866c77f580daa4814ca985167ce (patch)
tree3f60f275e30bdb96008ca8a302ec9b13e0cc549c /source4/auth
parent0c944d07dc534694729a1ae85d3f28206c6c0c40 (diff)
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s4-auth: rework map_user_info() to use cracknames
to properly support multi-domain forests we need to determine if an incoming username is part of a known forest domain or not. To do this for all possible SPN forms, we need to use CrackNames. This changes map_user_info() to use CrackNames if a SAM context is available, and asks the CrackNames services to parse the incoming username and domain into a NT4 form, which can then be used in the SAM. Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
Diffstat (limited to 'source4/auth')
-rw-r--r--source4/auth/ntlm/auth.c2
-rw-r--r--source4/auth/ntlm/auth_util.c226
2 files changed, 215 insertions, 13 deletions
diff --git a/source4/auth/ntlm/auth.c b/source4/auth/ntlm/auth.c
index 74e97cfd7d..69cbff6e9a 100644
--- a/source4/auth/ntlm/auth.c
+++ b/source4/auth/ntlm/auth.c
@@ -251,7 +251,7 @@ _PUBLIC_ struct tevent_req *auth_check_password_send(TALLOC_CTX *mem_ctx,
state->user_info = user_info;
if (!user_info->mapped_state) {
- nt_status = map_user_info(req, lpcfg_workgroup(auth_ctx->lp_ctx),
+ nt_status = map_user_info(auth_ctx->sam_ctx, req, lpcfg_workgroup(auth_ctx->lp_ctx),
user_info, &user_info_tmp);
if (tevent_req_nterror(req, nt_status)) {
return tevent_req_post(req, ev);
diff --git a/source4/auth/ntlm/auth_util.c b/source4/auth/ntlm/auth_util.c
index c19b5cfd42..16977fa00a 100644
--- a/source4/auth/ntlm/auth_util.c
+++ b/source4/auth/ntlm/auth_util.c
@@ -26,6 +26,8 @@
#include "libcli/auth/libcli_auth.h"
#include "param/param.h"
#include "auth/ntlm/auth_proto.h"
+#include "librpc/gen_ndr/drsuapi.h"
+#include "dsdb/samdb/samdb.h"
/* this default function can be used by mostly all backends
* which don't want to set a challenge
@@ -39,54 +41,254 @@ NTSTATUS auth_get_challenge_not_implemented(struct auth_method_context *ctx, TAL
/****************************************************************************
Create an auth_usersupplied_data structure after appropriate mapping.
****************************************************************************/
+static NTSTATUS map_user_info_cracknames(struct ldb_context *sam_ctx,
+ TALLOC_CTX *mem_ctx,
+ const char *default_domain,
+ const struct auth_usersupplied_info *user_info,
+ struct auth_usersupplied_info **user_info_mapped)
+{
+ char *domain;
+ char *account_name;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ WERROR werr;
+ struct drsuapi_DsNameInfo1 info1;
+
+ DEBUG(5,("map_user_info_cracknames: 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(tmp_ctx, user_info->client.account_name);
+ if (!account_name) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* use cracknames to work out what domain is being
+ asked for */
+ if (strchr_m(user_info->client.account_name, '@') != NULL) {
+ werr = DsCrackNameOneName(sam_ctx, tmp_ctx, 0,
+ DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
+ DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
+ user_info->client.account_name,
+ &info1);
+ if (!W_ERROR_IS_OK(werr)) {
+ DEBUG(2,("map_user_info: Failed cracknames of account '%s'\n",
+ user_info->client.account_name));
+ talloc_free(tmp_ctx);
+ return werror_to_ntstatus(werr);
+ }
+ switch (info1.status) {
+ case DRSUAPI_DS_NAME_STATUS_OK:
+ break;
+ case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
+ DEBUG(2,("map_user_info: Cracknames of account '%s' -> NOT_FOUND\n",
+ user_info->client.account_name));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
+ DEBUG(2,("map_user_info: Cracknames of account '%s' -> DOMAIN_ONLY\n",
+ user_info->client.account_name));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
+ DEBUG(2,("map_user_info: Cracknames of account '%s' -> NOT_UNIQUE\n",
+ user_info->client.account_name));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
+ DEBUG(2,("map_user_info: Cracknames of account '%s' -> RESOLVE_ERROR\n",
+ user_info->client.account_name));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ default:
+ DEBUG(2,("map_user_info: Cracknames of account '%s' -> unknown error %u\n",
+ user_info->client.account_name, info1.status));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ }
+ /* info1.result_name is in DOMAIN\username
+ * form, which we need to split up into the
+ * user_info_mapped structure
+ */
+ domain = talloc_strdup(tmp_ctx, info1.result_name);
+ if (domain == NULL) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+ account_name = strchr_m(domain, '\\');
+ if (account_name == NULL) {
+ DEBUG(2,("map_user_info: Cracknames of account '%s' gave invalid result '%s'\n",
+ user_info->client.account_name, info1.result_name));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ }
+ *account_name = 0;
+ account_name = talloc_strdup(tmp_ctx, account_name+1);
+ if (account_name == NULL) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+ } else {
+ char *domain_name;
+ if (user_info->client.domain_name && *user_info->client.domain_name) {
+ domain_name = talloc_asprintf(tmp_ctx, "%s\\", user_info->client.domain_name);
+ } else {
+ domain_name = talloc_strdup(tmp_ctx, default_domain);
+ }
+ if (domain_name == NULL) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+ werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
+ DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
+ DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
+ domain_name,
+ &info1);
+ if (!W_ERROR_IS_OK(werr)) {
+ DEBUG(2,("map_user_info: Failed cracknames of domain '%s'\n",
+ domain_name));
+ talloc_free(tmp_ctx);
+ return werror_to_ntstatus(werr);
+ }
+
+ /* we use the account_name as-is, but get the
+ * domain name from cracknames if possible */
+ account_name = talloc_strdup(mem_ctx, user_info->client.account_name);
+ if (account_name == NULL) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ switch (info1.status) {
+ case DRSUAPI_DS_NAME_STATUS_OK:
+ case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
+ domain = talloc_strdup(tmp_ctx, info1.result_name);
+ if (domain == NULL) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (domain[strlen_m(domain)-1] == '\\') {
+ domain[strlen_m(domain)-1] = 0;
+ }
+ break;
+ case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
+ /* the domain is unknown - use the
+ default domain */
+ domain = talloc_strdup(tmp_ctx, default_domain);
+ break;
+ case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
+ DEBUG(2,("map_user_info: Cracknames of domain '%s' -> NOT_UNIQUE\n",
+ domain_name));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
+ DEBUG(2,("map_user_info: Cracknames of domain '%s' -> RESOLVE_ERROR\n",
+ domain_name));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ default:
+ DEBUG(2,("map_user_info: Cracknames of account '%s' -> unknown error %u\n",
+ domain_name, info1.status));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ }
+ /* domain and account_name are filled in above */
+ }
-NTSTATUS map_user_info(TALLOC_CTX *mem_ctx,
+ *user_info_mapped = talloc_zero(mem_ctx, struct auth_usersupplied_info);
+ if (!*user_info_mapped) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (!talloc_reference(*user_info_mapped, user_info)) {
+ talloc_free(tmp_ctx);
+ 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(tmp_ctx);
+ 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 map_user_info(struct ldb_context *sam_ctx,
+ 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 *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));
+ TALLOC_CTX *tmp_ctx;
+
+ if (sam_ctx != NULL) {
+ /* if possible, use cracknames to parse the
+ domain/account */
+ return map_user_info_cracknames(sam_ctx, mem_ctx, default_domain, user_info, user_info_mapped);
+ }
+
+ DEBUG(0,("map_user_info: Mapping user [%s]\\[%s] from workstation [%s] default_domain=%s\n",
+ user_info->client.domain_name, user_info->client.account_name, user_info->workstation_name,
+ default_domain));
- account_name = talloc_strdup(mem_ctx, user_info->client.account_name);
+ tmp_ctx = talloc_new(mem_ctx);
+
+ account_name = talloc_strdup(tmp_ctx, user_info->client.account_name);
if (!account_name) {
+ talloc_free(tmp_ctx);
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. */
+ /* 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 */
+ /* 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;
+ domain = talloc_strdup(tmp_ctx, user_info->client.domain_name);
} else if (strchr_m(user_info->client.account_name, '@')) {
d = strchr_m(account_name, '@');
if (!d) {
+ talloc_free(tmp_ctx);
return NT_STATUS_INTERNAL_ERROR;
}
d[0] = '\0';
d++;
domain = d;
} else {
- domain = default_domain;
+ domain = talloc_strdup(tmp_ctx, default_domain);
}
+ if (domain == NULL) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
*user_info_mapped = talloc_zero(mem_ctx, struct auth_usersupplied_info);
if (!*user_info_mapped) {
+ talloc_free(tmp_ctx);
return NT_STATUS_NO_MEMORY;
}
if (!talloc_reference(*user_info_mapped, user_info)) {
+ talloc_free(tmp_ctx);
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);
+ talloc_free(tmp_ctx);
if (!(*user_info_mapped)->mapped.domain_name
|| !(*user_info_mapped)->mapped.account_name) {
return NT_STATUS_NO_MEMORY;