s4-gensec: Move parsing of the PAC blob and creating the session_info into auth
[ddiss/samba.git] / source4 / auth / ntlm / auth.c
index 46fd8877d2227ed8180c9dfb1013a189199bb1c1..d2f1d88508e41a296e582ae897325df9fdfeaaf9 100644 (file)
 #include "auth/ntlm/auth_proto.h"
 #include "param/param.h"
 #include "dsdb/samdb/samdb.h"
-
+#include "libcli/wbclient/wbclient.h"
+#include "lib/util/samba_modules.h"
+#include "auth/credentials/credentials.h"
+#include "system/kerberos.h"
+#include "auth/kerberos/kerberos.h"
+#include "auth/kerberos/kerberos_util.h"
+
+static NTSTATUS auth_generate_session_info_wrapper(TALLOC_CTX *mem_ctx,
+                                                  struct auth4_context *auth_context,
+                                                  struct auth_user_info_dc *user_info_dc,
+                                                  uint32_t session_info_flags,
+                                                  struct auth_session_info **session_info);
 
 /***************************************************************************
  Set a fixed challenge
 ***************************************************************************/
-_PUBLIC_ NTSTATUS auth_context_set_challenge(struct auth_context *auth_ctx, const uint8_t chal[8], const char *set_by) 
+_PUBLIC_ NTSTATUS auth_context_set_challenge(struct auth4_context *auth_ctx, const uint8_t chal[8], const char *set_by) 
 {
        auth_ctx->challenge.set_by = talloc_strdup(auth_ctx, set_by);
        NT_STATUS_HAVE_NO_MEMORY(auth_ctx->challenge.set_by);
@@ -45,7 +56,7 @@ _PUBLIC_ NTSTATUS auth_context_set_challenge(struct auth_context *auth_ctx, cons
 /***************************************************************************
  Set a fixed challenge
 ***************************************************************************/
-_PUBLIC_ bool auth_challenge_may_be_modified(struct auth_context *auth_ctx)
+_PUBLIC_ bool auth_challenge_may_be_modified(struct auth4_context *auth_ctx)
 {
        return auth_ctx->challenge.may_be_modified;
 }
@@ -54,7 +65,7 @@ _PUBLIC_ bool auth_challenge_may_be_modified(struct auth_context *auth_ctx)
  Try to get a challenge out of the various authentication modules.
  Returns a const char of length 8 bytes.
 ****************************************************************************/
-_PUBLIC_ NTSTATUS auth_get_challenge(struct auth_context *auth_ctx, uint8_t chal[8])
+_PUBLIC_ NTSTATUS auth_get_challenge(struct auth4_context *auth_ctx, uint8_t chal[8])
 {
        NTSTATUS nt_status;
        struct auth_method_context *method;
@@ -103,31 +114,39 @@ PAC isn't available, and for tokenGroups in the DSDB stack.
 
  Supply either a principal or a DN
 ****************************************************************************/
-_PUBLIC_ NTSTATUS auth_get_server_info_principal(TALLOC_CTX *mem_ctx, 
-                                                struct auth_context *auth_ctx,
-                                                const char *principal,
-                                                struct ldb_dn *user_dn,
-                                                struct auth_serversupplied_info **server_info)
+static NTSTATUS auth_generate_session_info_principal(struct auth4_context *auth_ctx,
+                                                 TALLOC_CTX *mem_ctx,
+                                                 const char *principal,
+                                                 struct ldb_dn *user_dn,
+                                                  uint32_t session_info_flags,
+                                                  struct auth_session_info **session_info)
 {
        NTSTATUS nt_status;
        struct auth_method_context *method;
+       struct auth_user_info_dc *user_info_dc;
 
        for (method = auth_ctx->methods; method; method = method->next) {
-               if (!method->ops->get_server_info_principal) {
+               if (!method->ops->get_user_info_dc_principal) {
                        continue;
                }
 
-               nt_status = method->ops->get_server_info_principal(mem_ctx, auth_ctx, principal, user_dn, server_info);
+               nt_status = method->ops->get_user_info_dc_principal(mem_ctx, auth_ctx, principal, user_dn, &user_info_dc);
                if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NOT_IMPLEMENTED)) {
                        continue;
                }
+               if (!NT_STATUS_IS_OK(nt_status)) {
+                       return nt_status;
+               }
 
-               NT_STATUS_NOT_OK_RETURN(nt_status);
+               nt_status = auth_generate_session_info_wrapper(mem_ctx, auth_ctx,
+                                                              user_info_dc,
+                                                              session_info_flags, session_info);
+               talloc_free(user_info_dc);
 
-               break;
+               return nt_status;
        }
 
-       return NT_STATUS_OK;
+       return NT_STATUS_NOT_IMPLEMENTED;
 }
 
 /**
@@ -135,9 +154,9 @@ _PUBLIC_ NTSTATUS auth_get_server_info_principal(TALLOC_CTX *mem_ctx,
  * (sync version)
  *
  * Check a user's password, as given in the user_info struct and return various
- * interesting details in the server_info struct.
+ * interesting details in the user_info_dc struct.
  *
- * The return value takes precedence over the contents of the server_info 
+ * The return value takes precedence over the contents of the user_info_dc
  * struct.  When the return is other than NT_STATUS_OK the contents 
  * of that structure is undefined.
  *
@@ -148,19 +167,19 @@ _PUBLIC_ NTSTATUS auth_get_server_info_principal(TALLOC_CTX *mem_ctx,
  *
  * @param user_info Contains the user supplied components, including the passwords.
  *
- * @param mem_ctx The parent memory context for the server_info structure
+ * @param mem_ctx The parent memory context for the user_info_dc structure
  *
- * @param server_info If successful, contains information about the authentication, 
+ * @param user_info_dc If successful, contains information about the authentication,
  *                    including a SAM_ACCOUNT struct describing the user.
  *
  * @return An NTSTATUS with NT_STATUS_OK or an appropriate error.
  *
  **/
 
-_PUBLIC_ NTSTATUS auth_check_password(struct auth_context *auth_ctx,
+_PUBLIC_ NTSTATUS auth_check_password(struct auth4_context *auth_ctx,
                             TALLOC_CTX *mem_ctx,
                             const struct auth_usersupplied_info *user_info, 
-                            struct auth_serversupplied_info **server_info)
+                            struct auth_user_info_dc **user_info_dc)
 {
        struct tevent_req *subreq;
        struct tevent_context *ev;
@@ -183,16 +202,16 @@ _PUBLIC_ NTSTATUS auth_check_password(struct auth_context *auth_ctx,
                return NT_STATUS_INTERNAL_ERROR;
        }
 
-       status = auth_check_password_recv(subreq, mem_ctx, server_info);
+       status = auth_check_password_recv(subreq, mem_ctx, user_info_dc);
        TALLOC_FREE(subreq);
 
        return status;
 }
 
 struct auth_check_password_state {
-       struct auth_context *auth_ctx;
+       struct auth4_context *auth_ctx;
        const struct auth_usersupplied_info *user_info;
-       struct auth_serversupplied_info *server_info;
+       struct auth_user_info_dc *user_info_dc;
        struct auth_method_context *method;
 };
 
@@ -204,9 +223,9 @@ static void auth_check_password_async_trigger(struct tevent_context *ev,
  * async send hook
  *
  * Check a user's password, as given in the user_info struct and return various
- * interesting details in the server_info struct.
+ * interesting details in the user_info_dc struct.
  *
- * The return value takes precedence over the contents of the server_info 
+ * The return value takes precedence over the contents of the user_info_dc
  * struct.  When the return is other than NT_STATUS_OK the contents 
  * of that structure is undefined.
  *
@@ -227,7 +246,7 @@ static void auth_check_password_async_trigger(struct tevent_context *ev,
 
 _PUBLIC_ struct tevent_req *auth_check_password_send(TALLOC_CTX *mem_ctx,
                                struct tevent_context *ev,
-                               struct auth_context *auth_ctx,
+                               struct auth4_context *auth_ctx,
                                const struct auth_usersupplied_info *user_info)
 {
        struct tevent_req *req;
@@ -253,7 +272,7 @@ _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);
@@ -336,7 +355,7 @@ static void auth_check_password_async_trigger(struct tevent_context *ev,
                status = method->ops->check_password(method,
                                                     state,
                                                     state->user_info,
-                                                    &state->server_info);
+                                                    &state->user_info_dc);
                if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
                        /* the backend has handled the request */
                        break;
@@ -360,16 +379,16 @@ static void auth_check_password_async_trigger(struct tevent_context *ev,
  * Check a user's Plaintext, LM or NTLM password.
  * async receive function
  *
- * The return value takes precedence over the contents of the server_info 
+ * The return value takes precedence over the contents of the user_info_dc
  * struct.  When the return is other than NT_STATUS_OK the contents 
  * of that structure is undefined.
  *
  *
  * @param req The async request state
  *
- * @param mem_ctx The parent memory context for the server_info structure
+ * @param mem_ctx The parent memory context for the user_info_dc structure
  *
- * @param server_info If successful, contains information about the authentication, 
+ * @param user_info_dc If successful, contains information about the authentication,
  *                    including a SAM_ACCOUNT struct describing the user.
  *
  * @return An NTSTATUS with NT_STATUS_OK or an appropriate error.
@@ -378,7 +397,7 @@ static void auth_check_password_async_trigger(struct tevent_context *ev,
 
 _PUBLIC_ NTSTATUS auth_check_password_recv(struct tevent_req *req,
                                  TALLOC_CTX *mem_ctx,
-                                 struct auth_serversupplied_info **server_info)
+                                 struct auth_user_info_dc **user_info_dc)
 {
        struct auth_check_password_state *state =
                tevent_req_data(req, struct auth_check_password_state);
@@ -399,42 +418,118 @@ _PUBLIC_ NTSTATUS auth_check_password_recv(struct tevent_req *req,
        DEBUG(5,("auth_check_password_recv: "
                 "%s authentication for user [%s\\%s] succeeded\n",
                 state->method->ops->name,
-                state->server_info->domain_name,
-                state->server_info->account_name));
+                state->user_info_dc->info->domain_name,
+                state->user_info_dc->info->account_name));
 
-       *server_info = talloc_move(mem_ctx, &state->server_info);
+       *user_info_dc = talloc_move(mem_ctx, &state->user_info_dc);
 
        tevent_req_received(req);
        return NT_STATUS_OK;
 }
 
+ /* Wrapper because we don't want to expose all callers to needing to
+  * know that session_info is generated from the main ldb, and because
+  * we need to break a depenency loop between the DCE/RPC layer and the
+  * generation of unix tokens via IRPC */
+static NTSTATUS auth_generate_session_info_wrapper(TALLOC_CTX *mem_ctx,
+                                                  struct auth4_context *auth_context,
+                                                  struct auth_user_info_dc *user_info_dc,
+                                                  uint32_t session_info_flags,
+                                                  struct auth_session_info **session_info)
+{
+       NTSTATUS status = auth_generate_session_info(mem_ctx, auth_context->lp_ctx,
+                                                    auth_context->sam_ctx, user_info_dc,
+                                                    session_info_flags, session_info);
+       if (!NT_STATUS_IS_OK(status)) {
+               return status;
+       }
+
+       if ((session_info_flags & AUTH_SESSION_INFO_UNIX_TOKEN)
+           && NT_STATUS_IS_OK(status)) {
+               struct wbc_context *wbc_ctx = wbc_init(auth_context,
+                                                      auth_context->msg_ctx,
+                                                      auth_context->event_ctx);
+               if (!wbc_ctx) {
+                       TALLOC_FREE(*session_info);
+                       DEBUG(1, ("Cannot contact winbind to provide unix token\n"));
+                       return NT_STATUS_INVALID_SERVER_STATE;
+               }
+               status = auth_session_info_fill_unix(wbc_ctx, auth_context->lp_ctx,
+                                                    *session_info);
+               if (!NT_STATUS_IS_OK(status)) {
+                       TALLOC_FREE(*session_info);
+               }
+               TALLOC_FREE(wbc_ctx);
+       }
+       return status;
+}
+
+/* Wrapper because we don't want to expose all callers to needing to
+ * know anything about the PAC or auth subsystem internal structures
+ * before we output a struct auth session_info */
+static NTSTATUS auth_generate_session_info_pac(struct auth4_context *auth_ctx,
+                                              TALLOC_CTX *mem_ctx_out,
+                                              struct smb_krb5_context *smb_krb5_context,
+                                              DATA_BLOB *pac_blob,
+                                              const char *principal_name,
+                                              const struct tsocket_address *remote_address,
+                                              uint32_t session_info_flags,
+                                              struct auth_session_info **session_info)
+{
+       NTSTATUS status;
+       struct auth_user_info_dc *user_info_dc;
+       TALLOC_CTX *mem_ctx;
+
+       if (!pac_blob) {
+               return auth_generate_session_info_principal(auth_ctx, mem_ctx_out, principal_name,
+                                                      NULL, session_info_flags, session_info);
+       }
+
+       mem_ctx = talloc_named(mem_ctx_out, 0, "gensec_gssapi_session_info context");
+       NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
+
+       status = kerberos_pac_blob_to_user_info_dc(mem_ctx,
+                                                  *pac_blob,
+                                                  smb_krb5_context->krb5_context,
+                                                  &user_info_dc, NULL, NULL);
+       if (!NT_STATUS_IS_OK(status)) {
+               talloc_free(mem_ctx);
+               return status;
+       }
+
+       if (user_info_dc->info->authenticated) {
+               session_info_flags |= AUTH_SESSION_INFO_AUTHENTICATED;
+       }
+
+       status = auth_generate_session_info_wrapper(mem_ctx_out, auth_ctx,
+                                                   user_info_dc,
+                                                   session_info_flags, session_info);
+       talloc_free(mem_ctx);
+       return status;
+}
+
 /***************************************************************************
  Make a auth_info struct for the auth subsystem
  - Allow the caller to specify the methods to use, including optionally the SAM to use
 ***************************************************************************/
 _PUBLIC_ NTSTATUS auth_context_create_methods(TALLOC_CTX *mem_ctx, const char **methods, 
                                              struct tevent_context *ev,
-                                             struct messaging_context *msg,
+                                             struct imessaging_context *msg,
                                              struct loadparm_context *lp_ctx,
                                              struct ldb_context *sam_ctx,
-                                             struct auth_context **auth_ctx)
+                                             struct auth4_context **auth_ctx)
 {
        int i;
-       struct auth_context *ctx;
-
-       auth_init();
+       struct auth4_context *ctx;
 
-       if (!methods) {
-               DEBUG(0,("auth_context_create: No auth method list!?\n"));
-               return NT_STATUS_INTERNAL_ERROR;
-       }
+       auth4_init();
 
        if (!ev) {
                DEBUG(0,("auth_context_create: called with out event context\n"));
                return NT_STATUS_INTERNAL_ERROR;
        }
 
-       ctx = talloc(mem_ctx, struct auth_context);
+       ctx = talloc_zero(mem_ctx, struct auth4_context);
        NT_STATUS_HAVE_NO_MEMORY(ctx);
        ctx->challenge.set_by           = NULL;
        ctx->challenge.may_be_modified  = false;
@@ -450,7 +545,7 @@ _PUBLIC_ NTSTATUS auth_context_create_methods(TALLOC_CTX *mem_ctx, const char **
                ctx->sam_ctx = samdb_connect(ctx, ctx->event_ctx, ctx->lp_ctx, system_session(ctx->lp_ctx), 0);
        }
 
-       for (i=0; methods[i] ; i++) {
+       for (i=0; methods && methods[i] ; i++) {
                struct auth_method_context *method;
 
                method = talloc(ctx, struct auth_method_context);
@@ -467,37 +562,35 @@ _PUBLIC_ NTSTATUS auth_context_create_methods(TALLOC_CTX *mem_ctx, const char **
                DLIST_ADD_END(ctx->methods, method, struct auth_method_context *);
        }
 
-       if (!ctx->methods) {
-               return NT_STATUS_INTERNAL_ERROR;
-       }
-
        ctx->check_password = auth_check_password;
        ctx->get_challenge = auth_get_challenge;
        ctx->set_challenge = auth_context_set_challenge;
        ctx->challenge_may_be_modified = auth_challenge_may_be_modified;
-       ctx->get_server_info_principal = auth_get_server_info_principal;
-       ctx->generate_session_info = auth_generate_session_info;
+       ctx->generate_session_info = auth_generate_session_info_wrapper;
+       ctx->generate_session_info_pac = auth_generate_session_info_pac;
 
        *auth_ctx = ctx;
 
        return NT_STATUS_OK;
 }
 
-static const char **auth_methods_from_lp(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
+const char **auth_methods_from_lp(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
 {
-       const char **auth_methods = NULL;
+       char **auth_methods = NULL;
+
        switch (lpcfg_server_role(lp_ctx)) {
        case ROLE_STANDALONE:
-               auth_methods = lpcfg_parm_string_list(mem_ctx, lp_ctx, NULL, "auth methods", "standalone", NULL);
+               auth_methods = str_list_make(mem_ctx, "anonymous sam_ignoredomain", NULL);
                break;
        case ROLE_DOMAIN_MEMBER:
-               auth_methods = lpcfg_parm_string_list(mem_ctx, lp_ctx, NULL, "auth methods", "member server", NULL);
+               auth_methods = str_list_make(mem_ctx, "anonymous sam winbind", NULL);
                break;
-       case ROLE_DOMAIN_CONTROLLER:
-               auth_methods = lpcfg_parm_string_list(mem_ctx, lp_ctx, NULL, "auth methods", "domain controller", NULL);
+       case ROLE_DOMAIN_BDC:
+       case ROLE_DOMAIN_PDC:
+               auth_methods = str_list_make(mem_ctx, "anonymous sam_ignoredomain winbind", NULL);
                break;
        }
-       return auth_methods;
+       return (const char **) auth_methods;
 }
 
 /***************************************************************************
@@ -506,9 +599,9 @@ static const char **auth_methods_from_lp(TALLOC_CTX *mem_ctx, struct loadparm_co
 ***************************************************************************/
 _PUBLIC_ NTSTATUS auth_context_create(TALLOC_CTX *mem_ctx,
                             struct tevent_context *ev,
-                            struct messaging_context *msg,
+                            struct imessaging_context *msg,
                             struct loadparm_context *lp_ctx,
-                            struct auth_context **auth_ctx)
+                            struct auth4_context **auth_ctx)
 {
        NTSTATUS status;
        const char **auth_methods;
@@ -526,32 +619,6 @@ _PUBLIC_ NTSTATUS auth_context_create(TALLOC_CTX *mem_ctx,
        return status;
 }
 
-/* Create an auth context from an open LDB.
-
-   This allows us not to re-open the LDB when we need to do a some authentication logic (such as tokenGroups)
-
- */
-NTSTATUS auth_context_create_from_ldb(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, struct auth_context **auth_ctx)
-{
-       NTSTATUS status;
-       const char **auth_methods;
-       struct loadparm_context *lp_ctx = talloc_get_type_abort(ldb_get_opaque(ldb, "loadparm"), struct loadparm_context);
-       struct tevent_context *ev = ldb_get_event_context(ldb);
-
-       TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
-       if (!tmp_ctx) {
-               return NT_STATUS_NO_MEMORY;
-       }
-
-       auth_methods = auth_methods_from_lp(tmp_ctx, lp_ctx);
-       if (!auth_methods) {
-               return NT_STATUS_INVALID_PARAMETER;
-       }
-       status = auth_context_create_methods(mem_ctx, auth_methods, ev, NULL, lp_ctx, ldb, auth_ctx);
-       talloc_free(tmp_ctx);
-       return status;
-}
-
 /* the list of currently registered AUTH backends */
 static struct auth_backend {
        const struct auth_operations *ops;
@@ -618,28 +685,23 @@ const struct auth_operations *auth_backend_byname(const char *name)
 const struct auth_critical_sizes *auth_interface_version(void)
 {
        static const struct auth_critical_sizes critical_sizes = {
-               AUTH_INTERFACE_VERSION,
+               AUTH4_INTERFACE_VERSION,
                sizeof(struct auth_operations),
                sizeof(struct auth_method_context),
-               sizeof(struct auth_context),
+               sizeof(struct auth4_context),
                sizeof(struct auth_usersupplied_info),
-               sizeof(struct auth_serversupplied_info)
+               sizeof(struct auth_user_info_dc)
        };
 
        return &critical_sizes;
 }
 
-_PUBLIC_ NTSTATUS auth_init(void)
+_PUBLIC_ NTSTATUS auth4_init(void)
 {
        static bool initialized = false;
-       extern NTSTATUS auth_developer_init(void);
-       extern NTSTATUS auth_winbind_init(void);
-       extern NTSTATUS auth_anonymous_init(void);
-       extern NTSTATUS auth_unix_init(void);
-       extern NTSTATUS auth_sam_init(void);
-       extern NTSTATUS auth_server_init(void);
-
-       init_module_fn static_init[] = { STATIC_auth_MODULES };
+#define _MODULE_PROTO(init) extern NTSTATUS init(void);
+       STATIC_auth4_MODULES_PROTO;
+       init_module_fn static_init[] = { STATIC_auth4_MODULES };
        
        if (initialized) return NT_STATUS_OK;
        initialized = true;