Adding upstream version 3.38.2.1.upstream/3.38.2.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 201 insertions, 0 deletions

diff --git a/pam-extensions/gdm-pam-extensions.h b/pam-extensions/gdm-pam-extensions.h
new file mode 100644
index 0000000..cecb742
--- /dev/null
+++ b/pam-extensions/gdm-pam-extensions.h
@@ -0,0 +1,178 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+#ifndef GDM_PAM_EXTENSIONS_H
+#define GDM_PAM_EXTENSIONS_H
+
+#include <alloca.h>
+#include <endian.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <limits.h>
+
+#include <security/pam_appl.h>
+
+typedef struct {
+        uint32_t length;
+
+        unsigned char type;
+        unsigned char data[];
+} GdmPamExtensionMessage;
+
+#define GDM_PAM_EXTENSION_MESSAGE_FROM_PAM_MESSAGE(query) (GdmPamExtensionMessage *) (void *) query->msg
+#define GDM_PAM_EXTENSION_MESSAGE_TO_PAM_REPLY(msg) (char *) (void *) msg
+#define GDM_PAM_EXTENSION_MESSAGE_TO_BINARY_PROMPT_MESSAGE(extended_message, binary_message) \
+{ \
+        (binary_message)->msg_style = PAM_BINARY_PROMPT; \
+        (binary_message)->msg = (void *) extended_message; \
+}
+#define GDM_PAM_EXTENSION_MESSAGE_TRUNCATED(msg) be32toh(msg->length) < sizeof (GdmPamExtensionMessage)
+#define GDM_PAM_EXTENSION_MESSAGE_INVALID_TYPE(msg) \
+({ \
+        bool _invalid = true; \
+        int _n = -1; \
+        const char *_supported_extensions; \
+        _supported_extensions = getenv ("GDM_SUPPORTED_PAM_EXTENSIONS"); \
+        if (_supported_extensions != NULL) { \
+                const char *_p = _supported_extensions; \
+                while (*_p != '\0' && _n < UCHAR_MAX) { \
+                        size_t _length; \
+                        _length = strcspn (_p, " "); \
+                        if (_length > 0) \
+                                _n++; \
+                        _p += _length; \
+                        _length = strspn (_p, " "); \
+                        _p += _length; \
+                } \
+                if (_n >= msg->type) \
+                        _invalid = false; \
+        } \
+        _invalid; \
+})
+#define GDM_PAM_EXTENSION_MESSAGE_MATCH(msg, supported_extensions, name) (strcmp (supported_extensions[msg->type], name) == 0)
+
+/* environment block should be a statically allocated chunk of memory.  This is important because
+ * putenv() will leak otherwise (and setenv isn't thread safe)
+ */
+#define GDM_PAM_EXTENSION_ADVERTISE_SUPPORTED_EXTENSIONS(environment_block, supported_extensions) \
+{ \
+        size_t _size = 0; \
+        unsigned char _t, _num_chunks; \
+        char *_p; \
+        _p = environment_block; \
+        _p = stpncpy (_p, "GDM_SUPPORTED_PAM_EXTENSIONS", sizeof(environment_block)); \
+        *_p = '\0'; \
+        _size += strlen (_p); \
+        for (_t = 0; supported_extensions[_t] != NULL && _t < UCHAR_MAX; _t++) {\
+                size_t _next_chunk = strlen (supported_extensions[_t]) + strlen (" "); \
+                if (_size + _next_chunk >= sizeof (environment_block)) \
+                        break; \
+                _size += _next_chunk; \
+        }\
+        _num_chunks = _t; \
+        if (_t != 0) { \
+                _p = stpcpy (_p, "="); \
+                for (_t = 0; _t < _num_chunks; _t++) { \
+                        if (_t != 0) \
+                                _p = stpcpy (_p, " "); \
+                        _p = stpcpy (_p, supported_extensions[_t]); \
+                } \
+                *_p = '\0'; \
+                putenv (environment_block); \
+        } \
+}
+
+#define GDM_PAM_EXTENSION_LOOK_UP_TYPE(name, extension_type) \
+({ \
+        bool _supported = false; \
+        unsigned char _t = 0; \
+        const char *_supported_extensions; \
+        _supported_extensions = getenv ("GDM_SUPPORTED_PAM_EXTENSIONS"); \
+        if (_supported_extensions != NULL) { \
+                const char *_p = _supported_extensions; \
+                while (*_p != '\0') { \
+                        size_t _length; \
+                        _length = strcspn (_p, " "); \
+                        if (strncmp (_p, name, _length) == 0) { \
+                                _supported = true; \
+                                break; \
+                        } \
+                        _p += _length; \
+                        _length = strspn (_p, " "); \
+                        _p += _length; \
+                        if (_t >= UCHAR_MAX) { \
+                                break; \
+                        } \
+                        _t++; \
+                } \
+                if (_supported && extension_type != NULL) \
+                        *extension_type = _t; \
+        } \
+        _supported; \
+})
+
+#define GDM_PAM_EXTENSION_SUPPORTED(name) GDM_PAM_EXTENSION_LOOK_UP_TYPE(name, (unsigned char *) NULL)
+
+typedef struct {
+        const char *key;
+        const char *text;
+} GdmChoiceListItems;
+
+typedef struct {
+        size_t number_of_items;
+        GdmChoiceListItems items[];
+} GdmChoiceList;
+
+typedef struct {
+        GdmPamExtensionMessage header;
+
+        char *prompt_message;
+        GdmChoiceList list;
+} GdmPamExtensionChoiceListRequest;
+
+typedef struct {
+        GdmPamExtensionMessage header;
+
+        char *key;
+} GdmPamExtensionChoiceListResponse;
+
+#define GDM_PAM_EXTENSION_CHOICE_LIST "org.gnome.DisplayManager.UserVerifier.ChoiceList"
+
+#define GDM_CHOICE_LIST_SIZE(num_items) (offsetof(GdmChoiceList, items) + (num_items) * sizeof (GdmChoiceListItems))
+#define GDM_PAM_EXTENSION_CHOICE_LIST_REQUEST_SIZE(num_items) (offsetof(GdmPamExtensionChoiceListRequest, list) + GDM_CHOICE_LIST_SIZE((num_items)))
+#define GDM_PAM_EXTENSION_CHOICE_LIST_REQUEST_INIT(request, title, num_items) \
+{ \
+        int _n = num_items; \
+        GDM_PAM_EXTENSION_LOOK_UP_TYPE (GDM_PAM_EXTENSION_CHOICE_LIST, &request->header.type); \
+        request->header.length = htobe32 (GDM_PAM_EXTENSION_CHOICE_LIST_REQUEST_SIZE(_n)); \
+        request->prompt_message = title; \
+        request->list.number_of_items = _n; \
+}
+
+#define GDM_PAM_EXTENSION_CHOICE_LIST_RESPONSE_SIZE sizeof (GdmPamExtensionChoiceListResponse)
+#define GDM_PAM_EXTENSION_CHOICE_LIST_RESPONSE_INIT(response) \
+{ \
+        GDM_PAM_EXTENSION_LOOK_UP_TYPE (GDM_PAM_EXTENSION_CHOICE_LIST, &response->header.type); \
+        response->header.length = htobe32 (GDM_PAM_EXTENSION_CHOICE_LIST_RESPONSE_SIZE); \
+        response->key = NULL; \
+}
+#define GDM_PAM_EXTENSION_REPLY_TO_CHOICE_LIST_RESPONSE(reply) ((GdmPamExtensionChoiceListResponse *) (void *) reply->resp)
+
+#endif
diff --git a/pam-extensions/gdm-pam-extensions.pc.in b/pam-extensions/gdm-pam-extensions.pc.in
new file mode 100644
index 0000000..5fc64b0
--- /dev/null
+++ b/pam-extensions/gdm-pam-extensions.pc.in
@@ -0,0 +1,9 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: GDM PAM Extensions
+Description: Macros for custom protocols over PAM
+Version: @VERSION@
+Cflags: -I${includedir}/gdm
diff --git a/pam-extensions/meson.build b/pam-extensions/meson.build
new file mode 100644
index 0000000..4e7bc2e
--- /dev/null
+++ b/pam-extensions/meson.build
@@ -0,0 +1,14 @@
+if pam_extensions_supported
+  pkgconfig.generate(
+    name: 'GDM PAM Extensions',
+    description: 'Macros for custom protocols over PAM',
+    filebase: 'gdm-pam-extensions',
+    version: meson.project_version(),
+    subdirs: meson.project_name(),
+  )
+
+  pam_extensions_inc = include_directories('.')
+  install_headers('gdm-pam-extensions.h',
+    subdir: meson.project_name()
+  )
+endif