glib2/gnutls-hmac.patch

From afb5735506e2ed1c638a8c916aa3748bf0615f32 Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Fri, 7 Jun 2019 18:44:43 +0000
Subject: [PATCH 1/2] ghmac: Split off wrapper functions into ghmac-utils.c

Prep for adding a GnuTLS HMAC implementation; these are just
utility functions that call the "core" API.
---
 glib/ghmac-utils.c | 145 +++++++++++++++++++++++++++++++++++++++++++++
 glib/ghmac.c       | 112 ----------------------------------
 glib/meson.build   |   1 +
 3 files changed, 146 insertions(+), 112 deletions(-)
 create mode 100644 glib/ghmac-utils.c

diff --git a/glib/ghmac-utils.c b/glib/ghmac-utils.c
new file mode 100644
index 000000000..a17359ff1
--- /dev/null
+++ b/glib/ghmac-utils.c
@@ -0,0 +1,145 @@
+/* ghmac.h - data hashing functions
+ *
+ * Copyright (C) 2011  Collabora Ltd.
+ * Copyright (C) 2019  Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include "ghmac.h"
+
+#include "glib/galloca.h"
+#include "gatomic.h"
+#include "gslice.h"
+#include "gmem.h"
+#include "gstrfuncs.h"
+#include "gtestutils.h"
+#include "gtypes.h"
+#include "glibintl.h"
+
+/**
+ * g_compute_hmac_for_data:
+ * @digest_type: a #GChecksumType to use for the HMAC
+ * @key: (array length=key_len): the key to use in the HMAC
+ * @key_len: the length of the key
+ * @data: (array length=length): binary blob to compute the HMAC of
+ * @length: length of @data
+ *
+ * Computes the HMAC for a binary @data of @length. This is a
+ * convenience wrapper for g_hmac_new(), g_hmac_get_string()
+ * and g_hmac_unref().
+ *
+ * The hexadecimal string returned will be in lower case.
+ *
+ * Returns: the HMAC of the binary data as a string in hexadecimal.
+ *   The returned string should be freed with g_free() when done using it.
+ *
+ * Since: 2.30
+ */
+gchar *
+g_compute_hmac_for_data (GChecksumType  digest_type,
+                         const guchar  *key,
+                         gsize          key_len,
+                         const guchar  *data,
+                         gsize          length)
+{
+  GHmac *hmac;
+  gchar *retval;
+
+  g_return_val_if_fail (length == 0 || data != NULL, NULL);
+
+  hmac = g_hmac_new (digest_type, key, key_len);
+  if (!hmac)
+    return NULL;
+
+  g_hmac_update (hmac, data, length);
+  retval = g_strdup (g_hmac_get_string (hmac));
+  g_hmac_unref (hmac);
+
+  return retval;
+}
+
+/**
+ * g_compute_hmac_for_bytes:
+ * @digest_type: a #GChecksumType to use for the HMAC
+ * @key: the key to use in the HMAC
+ * @data: binary blob to compute the HMAC of
+ *
+ * Computes the HMAC for a binary @data. This is a
+ * convenience wrapper for g_hmac_new(), g_hmac_get_string()
+ * and g_hmac_unref().
+ *
+ * The hexadecimal string returned will be in lower case.
+ *
+ * Returns: the HMAC of the binary data as a string in hexadecimal.
+ *   The returned string should be freed with g_free() when done using it.
+ *
+ * Since: 2.50
+ */
+gchar *
+g_compute_hmac_for_bytes (GChecksumType  digest_type,
+                          GBytes        *key,
+                          GBytes        *data)
+{
+  gconstpointer byte_data;
+  gsize length;
+  gconstpointer key_data;
+  gsize key_len;
+
+  g_return_val_if_fail (data != NULL, NULL);
+  g_return_val_if_fail (key != NULL, NULL);
+
+  byte_data = g_bytes_get_data (data, &length);
+  key_data = g_bytes_get_data (key, &key_len);
+  return g_compute_hmac_for_data (digest_type, key_data, key_len, byte_data, length);
+}
+
+
+/**
+ * g_compute_hmac_for_string:
+ * @digest_type: a #GChecksumType to use for the HMAC
+ * @key: (array length=key_len): the key to use in the HMAC
+ * @key_len: the length of the key
+ * @str: the string to compute the HMAC for
+ * @length: the length of the string, or -1 if the string is nul-terminated
+ *
+ * Computes the HMAC for a string.
+ *
+ * The hexadecimal string returned will be in lower case.
+ *
+ * Returns: the HMAC as a hexadecimal string.
+ *     The returned string should be freed with g_free()
+ *     when done using it.
+ *
+ * Since: 2.30
+ */
+gchar *
+g_compute_hmac_for_string (GChecksumType  digest_type,
+                           const guchar  *key,
+                           gsize          key_len,
+                           const gchar   *str,
+                           gssize         length)
+{
+  g_return_val_if_fail (length == 0 || str != NULL, NULL);
+
+  if (length < 0)
+    length = strlen (str);
+
+  return g_compute_hmac_for_data (digest_type, key, key_len,
+                                  (const guchar *) str, length);
+}
diff --git a/glib/ghmac.c b/glib/ghmac.c
index 49fd272f0..4f181f21f 100644
--- a/glib/ghmac.c
+++ b/glib/ghmac.c
@@ -329,115 +329,3 @@ g_hmac_get_digest (GHmac  *hmac,
   g_checksum_update (hmac->digesto, buffer, len);
   g_checksum_get_digest (hmac->digesto, buffer, digest_len);
 }
-
-/**
- * g_compute_hmac_for_data:
- * @digest_type: a #GChecksumType to use for the HMAC
- * @key: (array length=key_len): the key to use in the HMAC
- * @key_len: the length of the key
- * @data: (array length=length): binary blob to compute the HMAC of
- * @length: length of @data
- *
- * Computes the HMAC for a binary @data of @length. This is a
- * convenience wrapper for g_hmac_new(), g_hmac_get_string()
- * and g_hmac_unref().
- *
- * The hexadecimal string returned will be in lower case.
- *
- * Returns: the HMAC of the binary data as a string in hexadecimal.
- *   The returned string should be freed with g_free() when done using it.
- *
- * Since: 2.30
- */
-gchar *
-g_compute_hmac_for_data (GChecksumType  digest_type,
-                         const guchar  *key,
-                         gsize          key_len,
-                         const guchar  *data,
-                         gsize          length)
-{
-  GHmac *hmac;
-  gchar *retval;
-
-  g_return_val_if_fail (length == 0 || data != NULL, NULL);
-
-  hmac = g_hmac_new (digest_type, key, key_len);
-  if (!hmac)
-    return NULL;
-
-  g_hmac_update (hmac, data, length);
-  retval = g_strdup (g_hmac_get_string (hmac));
-  g_hmac_unref (hmac);
-
-  return retval;
-}
-
-/**
- * g_compute_hmac_for_bytes:
- * @digest_type: a #GChecksumType to use for the HMAC
- * @key: the key to use in the HMAC
- * @data: binary blob to compute the HMAC of
- *
- * Computes the HMAC for a binary @data. This is a
- * convenience wrapper for g_hmac_new(), g_hmac_get_string()
- * and g_hmac_unref().
- *
- * The hexadecimal string returned will be in lower case.
- *
- * Returns: the HMAC of the binary data as a string in hexadecimal.
- *   The returned string should be freed with g_free() when done using it.
- *
- * Since: 2.50
- */
-gchar *
-g_compute_hmac_for_bytes (GChecksumType  digest_type,
-                          GBytes        *key,
-                          GBytes        *data)
-{
-  gconstpointer byte_data;
-  gsize length;
-  gconstpointer key_data;
-  gsize key_len;
-
-  g_return_val_if_fail (data != NULL, NULL);
-  g_return_val_if_fail (key != NULL, NULL);
-
-  byte_data = g_bytes_get_data (data, &length);
-  key_data = g_bytes_get_data (key, &key_len);
-  return g_compute_hmac_for_data (digest_type, key_data, key_len, byte_data, length);
-}
-
-
-/**
- * g_compute_hmac_for_string:
- * @digest_type: a #GChecksumType to use for the HMAC
- * @key: (array length=key_len): the key to use in the HMAC
- * @key_len: the length of the key
- * @str: the string to compute the HMAC for
- * @length: the length of the string, or -1 if the string is nul-terminated
- *
- * Computes the HMAC for a string.
- *
- * The hexadecimal string returned will be in lower case.
- *
- * Returns: the HMAC as a hexadecimal string.
- *     The returned string should be freed with g_free()
- *     when done using it.
- *
- * Since: 2.30
- */
-gchar *
-g_compute_hmac_for_string (GChecksumType  digest_type,
-                           const guchar  *key,
-                           gsize          key_len,
-                           const gchar   *str,
-                           gssize         length)
-{
-  g_return_val_if_fail (length == 0 || str != NULL, NULL);
-
-  if (length < 0)
-    length = strlen (str);
-
-  return g_compute_hmac_for_data (digest_type, key, key_len,
-                                  (const guchar *) str, length);
-}
diff --git a/glib/meson.build b/glib/meson.build
index aaf40a218..b3bf067c7 100644
--- a/glib/meson.build
+++ b/glib/meson.build
@@ -253,6 +253,7 @@ glib_sources = files(
   'ggettext.c',
   'ghash.c',
   'ghmac.c',
+  'ghmac-utils.c',
   'ghook.c',
   'ghostutils.c',
   'giochannel.c',
-- 
2.28.0


From 703e63f9d8b3ea4f26f41f0d2287b301025a73cc Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Fri, 7 Jun 2019 19:36:54 +0000
Subject: [PATCH 2/2] Add a gnutls backend for GHmac

For RHEL we want apps to use FIPS-certified crypto libraries,
and HMAC apparently counts as "keyed" and hence needs to
be validated.

Bug: https://bugzilla.redhat.com/show_bug.cgi?id=1630260
Replaces: https://gitlab.gnome.org/GNOME/glib/merge_requests/897

This is a build-time option that backs the GHmac API with GnuTLS.
Most distributors ship glib-networking built with GnuTLS, and
most apps use glib-networking, so this isn't a net-new library
in most cases.

mcatanzaro note: I've updated Colin's original patch to implement
g_hmac_copy() using gnutls_hmac_copy(), which didn't exist when Colin
developed this patch.
---
 glib/gchecksum.c        |   9 ++-
 glib/gchecksumprivate.h |  32 ++++++++
 glib/ghmac-gnutls.c     | 164 ++++++++++++++++++++++++++++++++++++++++
 glib/ghmac.c            |   3 +
 glib/meson.build        |  10 ++-
 meson.build             |   7 ++
 meson_options.txt       |   5 ++
 7 files changed, 224 insertions(+), 6 deletions(-)
 create mode 100644 glib/gchecksumprivate.h
 create mode 100644 glib/ghmac-gnutls.c

diff --git a/glib/gchecksum.c b/glib/gchecksum.c
index f8a3f9ab8..b391a6264 100644
--- a/glib/gchecksum.c
+++ b/glib/gchecksum.c
@@ -20,7 +20,7 @@
 
 #include <string.h>
 
-#include "gchecksum.h"
+#include "gchecksumprivate.h"
 
 #include "gslice.h"
 #include "gmem.h"
@@ -173,9 +173,9 @@ sha_byte_reverse (guint32 *buffer,
 }
 #endif /* G_BYTE_ORDER == G_BIG_ENDIAN */
 
-static gchar *
-digest_to_string (guint8 *digest,
-                  gsize   digest_len)
+gchar *
+gchecksum_digest_to_string (guint8 *digest,
+                            gsize   digest_len)
 {
   gsize i, len = digest_len * 2;
   gchar *retval;
@@ -194,6 +194,7 @@ digest_to_string (guint8 *digest,
 
   return retval;
 }
+#define digest_to_string gchecksum_digest_to_string
 
 /*
  * MD5 Checksum
diff --git a/glib/gchecksumprivate.h b/glib/gchecksumprivate.h
new file mode 100644
index 000000000..86c7a3b61
--- /dev/null
+++ b/glib/gchecksumprivate.h
@@ -0,0 +1,32 @@
+/* gstdioprivate.h - Private GLib stdio functions
+ *
+ * Copyright 2017 Руслан Ижбулатов
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __G_CHECKSUMPRIVATE_H__
+#define __G_CHECKSUMPRIVATE_H__
+
+#include "gchecksum.h"
+
+G_BEGIN_DECLS
+
+gchar *
+gchecksum_digest_to_string (guint8 *digest,
+                            gsize   digest_len);
+
+G_END_DECLS
+
+#endif
\ No newline at end of file
diff --git a/glib/ghmac-gnutls.c b/glib/ghmac-gnutls.c
new file mode 100644
index 000000000..f1a74a849
--- /dev/null
+++ b/glib/ghmac-gnutls.c
@@ -0,0 +1,164 @@
+/* ghmac.h - data hashing functions
+ *
+ * Copyright (C) 2011  Collabora Ltd.
+ * Copyright (C) 2019  Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <gnutls/crypto.h>
+
+#include "ghmac.h"
+
+#include "glib/galloca.h"
+#include "gatomic.h"
+#include "gslice.h"
+#include "gmem.h"
+#include "gstrfuncs.h"
+#include "gchecksumprivate.h"
+#include "gtestutils.h"
+#include "gtypes.h"
+#include "glibintl.h"
+
+#ifndef HAVE_GNUTLS
+#error "build configuration error"
+#endif
+
+struct _GHmac
+{
+  int ref_count;
+  GChecksumType digest_type;
+  gnutls_hmac_hd_t hmac;
+  gchar *digest_str;
+};
+
+GHmac *
+g_hmac_new (GChecksumType  digest_type,
+            const guchar  *key,
+            gsize          key_len)
+{
+  gnutls_mac_algorithm_t algo;
+  GHmac *hmac = g_slice_new0 (GHmac);
+  hmac->ref_count = 1;
+  hmac->digest_type = digest_type;  
+
+  switch (digest_type)
+    {
+    case G_CHECKSUM_MD5:
+      algo = GNUTLS_MAC_MD5;
+      break;
+    case G_CHECKSUM_SHA1:
+      algo = GNUTLS_MAC_SHA1;
+      break;
+    case G_CHECKSUM_SHA256:
+      algo = GNUTLS_MAC_SHA256;
+      break;
+    case G_CHECKSUM_SHA384:
+      algo = GNUTLS_MAC_SHA384;
+      break;
+    case G_CHECKSUM_SHA512:
+      algo = GNUTLS_MAC_SHA512;
+      break;
+    default:
+      g_return_val_if_reached (NULL);
+    }
+
+  gnutls_hmac_init (&hmac->hmac, algo, key, key_len);
+
+  return hmac;
+}
+
+GHmac *
+g_hmac_copy (const GHmac *hmac)
+{
+  GHmac *copy;
+
+  g_return_val_if_fail (hmac != NULL, NULL);
+
+  copy = g_slice_new0 (GHmac);
+  copy->ref_count = 1;
+  copy->digest_type = hmac->digest_type;
+  copy->hmac = gnutls_hmac_copy (hmac->hmac);
+
+  return copy;
+}
+
+GHmac *
+g_hmac_ref (GHmac *hmac)
+{
+  g_return_val_if_fail (hmac != NULL, NULL);
+
+  g_atomic_int_inc (&hmac->ref_count);
+
+  return hmac;
+}
+
+void
+g_hmac_unref (GHmac *hmac)
+{
+  g_return_if_fail (hmac != NULL);
+
+  if (g_atomic_int_dec_and_test (&hmac->ref_count))
+    {
+      gnutls_hmac_deinit (hmac->hmac, NULL);
+      g_free (hmac->digest_str);
+      g_slice_free (GHmac, hmac);
+    }
+}
+
+
+void
+g_hmac_update (GHmac        *hmac,
+               const guchar *data,
+               gssize        length)
+{
+  g_return_if_fail (hmac != NULL);
+  g_return_if_fail (length == 0 || data != NULL);
+
+  gnutls_hmac (hmac->hmac, data, length);
+}
+
+const gchar *
+g_hmac_get_string (GHmac *hmac)
+{
+  guint8 *buffer;
+  gsize digest_len;
+
+  g_return_val_if_fail (hmac != NULL, NULL);
+
+  if (hmac->digest_str)
+    return hmac->digest_str;
+
+  digest_len = g_checksum_type_get_length (hmac->digest_type);
+  buffer = g_alloca (digest_len);
+
+  gnutls_hmac_output (hmac->hmac, buffer);
+  hmac->digest_str = gchecksum_digest_to_string (buffer, digest_len);
+  return hmac->digest_str;
+}
+
+
+void
+g_hmac_get_digest (GHmac  *hmac,
+                   guint8 *buffer,
+                   gsize  *digest_len)
+{
+  g_return_if_fail (hmac != NULL);
+
+  gnutls_hmac_output (hmac->hmac, buffer);
+  *digest_len = g_checksum_type_get_length (hmac->digest_type);
+}
diff --git a/glib/ghmac.c b/glib/ghmac.c
index 4f181f21f..c62d9ce4e 100644
--- a/glib/ghmac.c
+++ b/glib/ghmac.c
@@ -33,6 +33,9 @@
 #include "gtypes.h"
 #include "glibintl.h"
 
+#ifdef HAVE_GNUTLS
+#error "build configuration error"
+#endif
 
 /**
  * SECTION:hmac
diff --git a/glib/meson.build b/glib/meson.build
index b3bf067c7..3cdc3b573 100644
--- a/glib/meson.build
+++ b/glib/meson.build
@@ -252,7 +252,6 @@ glib_sources = files(
   'gfileutils.c',
   'ggettext.c',
   'ghash.c',
-  'ghmac.c',
   'ghmac-utils.c',
   'ghook.c',
   'ghostutils.c',
@@ -308,6 +307,7 @@ glib_sources = files(
   'guriprivate.h',
   'gutils.c',
   'gutilsprivate.h',
+  'gchecksumprivate.h',
   'guuid.c',
   'gvariant.c',
   'gvariant-core.c',
@@ -352,6 +352,12 @@ else
   glib_dtrace_hdr = []
 endif
 
+if get_option('gnutls')
+  glib_sources += files('ghmac-gnutls.c')
+else
+  glib_sources += files('ghmac.c')
+endif
+
 pcre_static_args = []
 
 if use_pcre_static_flag
@@ -378,7 +384,7 @@ libglib = library('glib-2.0',
   # intl.lib is not compatible with SAFESEH
   link_args : [noseh_link_args, glib_link_flags, win32_ldflags],
   include_directories : configinc,
-  dependencies : pcre_deps + [thread_dep, librt] + libintl_deps + libiconv + platform_deps + gnulib_libm_dependency + [libsysprof_capture_dep],
+  dependencies : pcre_deps + libgnutls_dep + [thread_dep, librt] + libintl_deps + libiconv + platform_deps + gnulib_libm_dependency + [libsysprof_capture_dep],
   c_args : glib_c_args,
   objc_args : glib_c_args,
 )
diff --git a/meson.build b/meson.build
index e0b308a25..70dd5355e 100644
--- a/meson.build
+++ b/meson.build
@@ -2056,6 +2056,13 @@ if host_system == 'linux'
   glib_conf.set('HAVE_LIBMOUNT', libmount_dep.found())
 endif
 
+# gnutls is used optionally by ghmac
+libgnutls_dep = []
+if get_option('gnutls')
+  libgnutls_dep = [dependency('gnutls', version : '>=3.6.9', required : true)]
+  glib_conf.set('HAVE_GNUTLS', 1)
+endif
+
 if host_system == 'windows'
   winsock2 = cc.find_library('ws2_32')
 endif
diff --git a/meson_options.txt b/meson_options.txt
index af9645eda..2c4b2c37e 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -34,6 +34,11 @@ option('libmount',
        value : 'auto',
        description : 'build with libmount support')
 
+option('gnutls',
+       type : 'boolean',
+       value : false,
+       description : 'build with gnutls support')
+
 option('internal_pcre',
        type : 'boolean',
        value : false,
-- 
2.28.0